4073 lines
110 KiB
C
4073 lines
110 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* tiny vi.c: A small 'vi' clone
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* Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com>
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*
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* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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*/
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/*
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* Things To Do:
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* EXINIT
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* $HOME/.exrc and ./.exrc
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* add magic to search /foo.*bar
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* add :help command
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* :map macros
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* if mark[] values were line numbers rather than pointers
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* it would be easier to change the mark when add/delete lines
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* More intelligence in refresh()
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* ":r !cmd" and "!cmd" to filter text through an external command
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* A true "undo" facility
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* An "ex" line oriented mode- maybe using "cmdedit"
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*/
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#include "libbb.h"
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/* the CRASHME code is unmaintained, and doesn't currently build */
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#define ENABLE_FEATURE_VI_CRASHME 0
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#if ENABLE_LOCALE_SUPPORT
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#if ENABLE_FEATURE_VI_8BIT
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#define Isprint(c) isprint(c)
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#else
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#define Isprint(c) (isprint(c) && (unsigned char)(c) < 0x7f)
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#endif
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#else
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/* 0x9b is Meta-ESC */
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#if ENABLE_FEATURE_VI_8BIT
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#define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b)
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#else
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#define Isprint(c) ((unsigned char)(c) >= ' ' && (unsigned char)(c) < 0x7f)
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#endif
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#endif
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enum {
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MAX_TABSTOP = 32, // sanity limit
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// User input len. Need not be extra big.
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// Lines in file being edited *can* be bigger than this.
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MAX_INPUT_LEN = 128,
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// Sanity limits. We have only one buffer of this size.
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MAX_SCR_COLS = CONFIG_FEATURE_VI_MAX_LEN,
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MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN,
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};
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// Misc. non-Ascii keys that report an escape sequence
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#define VI_K_UP (char)128 // cursor key Up
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#define VI_K_DOWN (char)129 // cursor key Down
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#define VI_K_RIGHT (char)130 // Cursor Key Right
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#define VI_K_LEFT (char)131 // cursor key Left
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#define VI_K_HOME (char)132 // Cursor Key Home
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#define VI_K_END (char)133 // Cursor Key End
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#define VI_K_INSERT (char)134 // Cursor Key Insert
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#define VI_K_DELETE (char)135 // Cursor Key Insert
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#define VI_K_PAGEUP (char)136 // Cursor Key Page Up
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#define VI_K_PAGEDOWN (char)137 // Cursor Key Page Down
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#define VI_K_FUN1 (char)138 // Function Key F1
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#define VI_K_FUN2 (char)139 // Function Key F2
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#define VI_K_FUN3 (char)140 // Function Key F3
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#define VI_K_FUN4 (char)141 // Function Key F4
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#define VI_K_FUN5 (char)142 // Function Key F5
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#define VI_K_FUN6 (char)143 // Function Key F6
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#define VI_K_FUN7 (char)144 // Function Key F7
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#define VI_K_FUN8 (char)145 // Function Key F8
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#define VI_K_FUN9 (char)146 // Function Key F9
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#define VI_K_FUN10 (char)147 // Function Key F10
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#define VI_K_FUN11 (char)148 // Function Key F11
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#define VI_K_FUN12 (char)149 // Function Key F12
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/* vt102 typical ESC sequence */
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/* terminal standout start/normal ESC sequence */
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static const char SOs[] ALIGN1 = "\033[7m";
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static const char SOn[] ALIGN1 = "\033[0m";
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/* terminal bell sequence */
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static const char bell[] ALIGN1 = "\007";
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/* Clear-end-of-line and Clear-end-of-screen ESC sequence */
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static const char Ceol[] ALIGN1 = "\033[0K";
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static const char Ceos[] ALIGN1 = "\033[0J";
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/* Cursor motion arbitrary destination ESC sequence */
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static const char CMrc[] ALIGN1 = "\033[%d;%dH";
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/* Cursor motion up and down ESC sequence */
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static const char CMup[] ALIGN1 = "\033[A";
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static const char CMdown[] ALIGN1 = "\n";
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enum {
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YANKONLY = FALSE,
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YANKDEL = TRUE,
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FORWARD = 1, // code depends on "1" for array index
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BACK = -1, // code depends on "-1" for array index
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LIMITED = 0, // how much of text[] in char_search
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FULL = 1, // how much of text[] in char_search
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S_BEFORE_WS = 1, // used in skip_thing() for moving "dot"
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S_TO_WS = 2, // used in skip_thing() for moving "dot"
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S_OVER_WS = 3, // used in skip_thing() for moving "dot"
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S_END_PUNCT = 4, // used in skip_thing() for moving "dot"
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S_END_ALNUM = 5, // used in skip_thing() for moving "dot"
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};
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/* vi.c expects chars to be unsigned. */
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/* busybox build system provides that, but it's better */
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/* to audit and fix the source */
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struct globals {
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/* many references - keep near the top of globals */
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char *text, *end; // pointers to the user data in memory
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char *dot; // where all the action takes place
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int text_size; // size of the allocated buffer
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/* the rest */
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smallint vi_setops;
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#define VI_AUTOINDENT 1
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#define VI_SHOWMATCH 2
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#define VI_IGNORECASE 4
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#define VI_ERR_METHOD 8
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#define autoindent (vi_setops & VI_AUTOINDENT)
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#define showmatch (vi_setops & VI_SHOWMATCH )
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#define ignorecase (vi_setops & VI_IGNORECASE)
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/* indicate error with beep or flash */
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#define err_method (vi_setops & VI_ERR_METHOD)
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#if ENABLE_FEATURE_VI_READONLY
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smallint readonly_mode;
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#define SET_READONLY_FILE(flags) ((flags) |= 0x01)
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#define SET_READONLY_MODE(flags) ((flags) |= 0x02)
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#define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe)
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#else
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#define SET_READONLY_FILE(flags) ((void)0)
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#define SET_READONLY_MODE(flags) ((void)0)
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#define UNSET_READONLY_FILE(flags) ((void)0)
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#endif
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smallint editing; // >0 while we are editing a file
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// [code audit says "can be 0 or 1 only"]
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smallint cmd_mode; // 0=command 1=insert 2=replace
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int file_modified; // buffer contents changed (counter, not flag!)
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int last_file_modified; // = -1;
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int fn_start; // index of first cmd line file name
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int save_argc; // how many file names on cmd line
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int cmdcnt; // repetition count
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unsigned rows, columns; // the terminal screen is this size
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int crow, ccol; // cursor is on Crow x Ccol
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int offset; // chars scrolled off the screen to the left
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int have_status_msg; // is default edit status needed?
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// [don't make smallint!]
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int last_status_cksum; // hash of current status line
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char *current_filename;
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char *screenbegin; // index into text[], of top line on the screen
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char *screen; // pointer to the virtual screen buffer
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int screensize; // and its size
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int tabstop;
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char erase_char; // the users erase character
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char last_input_char; // last char read from user
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char last_forward_char; // last char searched for with 'f'
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#if ENABLE_FEATURE_VI_DOT_CMD
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smallint adding2q; // are we currently adding user input to q
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int lmc_len; // length of last_modifying_cmd
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char *ioq, *ioq_start; // pointer to string for get_one_char to "read"
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#endif
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#if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
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int last_row; // where the cursor was last moved to
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#endif
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#if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
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int my_pid;
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#endif
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#if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
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char *modifying_cmds; // cmds that modify text[]
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#endif
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#if ENABLE_FEATURE_VI_SEARCH
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char *last_search_pattern; // last pattern from a '/' or '?' search
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#endif
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int chars_to_parse;
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/* former statics */
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#if ENABLE_FEATURE_VI_YANKMARK
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char *edit_file__cur_line;
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#endif
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int refresh__old_offset;
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int format_edit_status__tot;
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/* a few references only */
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#if ENABLE_FEATURE_VI_YANKMARK
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int YDreg, Ureg; // default delete register and orig line for "U"
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char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
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char *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
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char *context_start, *context_end;
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#endif
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#if ENABLE_FEATURE_VI_USE_SIGNALS
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sigjmp_buf restart; // catch_sig()
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#endif
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struct termios term_orig, term_vi; // remember what the cooked mode was
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#if ENABLE_FEATURE_VI_COLON
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char *initial_cmds[3]; // currently 2 entries, NULL terminated
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#endif
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// Should be just enough to hold a key sequence,
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// but CRASME mode uses it as generated command buffer too
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#if ENABLE_FEATURE_VI_CRASHME
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char readbuffer[128];
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#else
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char readbuffer[32];
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#endif
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#define STATUS_BUFFER_LEN 200
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char status_buffer[STATUS_BUFFER_LEN]; // messages to the user
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#if ENABLE_FEATURE_VI_DOT_CMD
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char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "."
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#endif
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char get_input_line__buf[MAX_INPUT_LEN]; /* former static */
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char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2];
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};
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#define G (*ptr_to_globals)
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#define text (G.text )
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#define text_size (G.text_size )
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#define end (G.end )
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#define dot (G.dot )
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#define reg (G.reg )
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#define vi_setops (G.vi_setops )
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#define editing (G.editing )
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#define cmd_mode (G.cmd_mode )
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#define file_modified (G.file_modified )
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#define last_file_modified (G.last_file_modified )
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#define fn_start (G.fn_start )
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#define save_argc (G.save_argc )
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#define cmdcnt (G.cmdcnt )
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#define rows (G.rows )
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#define columns (G.columns )
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#define crow (G.crow )
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#define ccol (G.ccol )
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#define offset (G.offset )
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#define status_buffer (G.status_buffer )
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#define have_status_msg (G.have_status_msg )
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#define last_status_cksum (G.last_status_cksum )
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#define current_filename (G.current_filename )
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#define screen (G.screen )
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#define screensize (G.screensize )
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#define screenbegin (G.screenbegin )
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#define tabstop (G.tabstop )
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#define erase_char (G.erase_char )
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#define last_input_char (G.last_input_char )
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#define last_forward_char (G.last_forward_char )
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#if ENABLE_FEATURE_VI_READONLY
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#define readonly_mode (G.readonly_mode )
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#else
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#define readonly_mode 0
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#endif
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#define adding2q (G.adding2q )
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#define lmc_len (G.lmc_len )
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#define ioq (G.ioq )
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#define ioq_start (G.ioq_start )
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#define last_row (G.last_row )
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#define my_pid (G.my_pid )
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#define modifying_cmds (G.modifying_cmds )
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#define last_search_pattern (G.last_search_pattern)
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#define chars_to_parse (G.chars_to_parse )
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#define edit_file__cur_line (G.edit_file__cur_line)
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#define refresh__old_offset (G.refresh__old_offset)
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#define format_edit_status__tot (G.format_edit_status__tot)
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#define YDreg (G.YDreg )
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#define Ureg (G.Ureg )
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#define mark (G.mark )
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#define context_start (G.context_start )
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#define context_end (G.context_end )
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#define restart (G.restart )
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#define term_orig (G.term_orig )
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#define term_vi (G.term_vi )
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#define initial_cmds (G.initial_cmds )
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#define readbuffer (G.readbuffer )
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#define scr_out_buf (G.scr_out_buf )
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#define last_modifying_cmd (G.last_modifying_cmd )
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#define get_input_line__buf (G.get_input_line__buf)
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#define INIT_G() do { \
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SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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last_file_modified = -1; \
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} while (0)
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static int init_text_buffer(char *); // init from file or create new
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static void edit_file(char *); // edit one file
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static void do_cmd(char); // execute a command
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static int next_tabstop(int);
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static void sync_cursor(char *, int *, int *); // synchronize the screen cursor to dot
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static char *begin_line(char *); // return pointer to cur line B-o-l
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static char *end_line(char *); // return pointer to cur line E-o-l
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static char *prev_line(char *); // return pointer to prev line B-o-l
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static char *next_line(char *); // return pointer to next line B-o-l
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static char *end_screen(void); // get pointer to last char on screen
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static int count_lines(char *, char *); // count line from start to stop
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static char *find_line(int); // find begining of line #li
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static char *move_to_col(char *, int); // move "p" to column l
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static void dot_left(void); // move dot left- dont leave line
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static void dot_right(void); // move dot right- dont leave line
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static void dot_begin(void); // move dot to B-o-l
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static void dot_end(void); // move dot to E-o-l
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static void dot_next(void); // move dot to next line B-o-l
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static void dot_prev(void); // move dot to prev line B-o-l
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static void dot_scroll(int, int); // move the screen up or down
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static void dot_skip_over_ws(void); // move dot pat WS
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static void dot_delete(void); // delete the char at 'dot'
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static char *bound_dot(char *); // make sure text[0] <= P < "end"
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static char *new_screen(int, int); // malloc virtual screen memory
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static char *char_insert(char *, char); // insert the char c at 'p'
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static char *stupid_insert(char *, char); // stupidly insert the char c at 'p'
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static int find_range(char **, char **, char); // return pointers for an object
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static int st_test(char *, int, int, char *); // helper for skip_thing()
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static char *skip_thing(char *, int, int, int); // skip some object
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static char *find_pair(char *, char); // find matching pair () [] {}
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static char *text_hole_delete(char *, char *); // at "p", delete a 'size' byte hole
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static char *text_hole_make(char *, int); // at "p", make a 'size' byte hole
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static char *yank_delete(char *, char *, int, int); // yank text[] into register then delete
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static void show_help(void); // display some help info
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static void rawmode(void); // set "raw" mode on tty
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static void cookmode(void); // return to "cooked" mode on tty
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// sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
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static int mysleep(int);
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static char readit(void); // read (maybe cursor) key from stdin
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static char get_one_char(void); // read 1 char from stdin
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static int file_size(const char *); // what is the byte size of "fn"
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#if ENABLE_FEATURE_VI_READONLY
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static int file_insert(const char *, char *, int);
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#else
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static int file_insert(const char *, char *);
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#endif
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static int file_write(char *, char *, char *);
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#if !ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
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#define place_cursor(a, b, optimize) place_cursor(a, b)
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#endif
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static void place_cursor(int, int, int);
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static void screen_erase(void);
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static void clear_to_eol(void);
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static void clear_to_eos(void);
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static void standout_start(void); // send "start reverse video" sequence
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static void standout_end(void); // send "end reverse video" sequence
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static void flash(int); // flash the terminal screen
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static void show_status_line(void); // put a message on the bottom line
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static void status_line(const char *, ...); // print to status buf
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static void status_line_bold(const char *, ...);
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static void not_implemented(const char *); // display "Not implemented" message
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static int format_edit_status(void); // format file status on status line
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static void redraw(int); // force a full screen refresh
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static char* format_line(char* /*, int*/);
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static void refresh(int); // update the terminal from screen[]
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static void Indicate_Error(void); // use flash or beep to indicate error
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#define indicate_error(c) Indicate_Error()
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static void Hit_Return(void);
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#if ENABLE_FEATURE_VI_SEARCH
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static char *char_search(char *, const char *, int, int); // search for pattern starting at p
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static int mycmp(const char *, const char *, int); // string cmp based in "ignorecase"
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#endif
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#if ENABLE_FEATURE_VI_COLON
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static char *get_one_address(char *, int *); // get colon addr, if present
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static char *get_address(char *, int *, int *); // get two colon addrs, if present
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static void colon(char *); // execute the "colon" mode cmds
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#endif
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#if ENABLE_FEATURE_VI_USE_SIGNALS
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static void winch_sig(int); // catch window size changes
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static void suspend_sig(int); // catch ctrl-Z
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static void catch_sig(int); // catch ctrl-C and alarm time-outs
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#endif
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#if ENABLE_FEATURE_VI_DOT_CMD
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static void start_new_cmd_q(char); // new queue for command
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static void end_cmd_q(void); // stop saving input chars
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#else
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#define end_cmd_q() ((void)0)
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#endif
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#if ENABLE_FEATURE_VI_SETOPTS
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static void showmatching(char *); // show the matching pair () [] {}
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#endif
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#if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME
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static char *string_insert(char *, char *); // insert the string at 'p'
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#endif
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#if ENABLE_FEATURE_VI_YANKMARK
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static char *text_yank(char *, char *, int); // save copy of "p" into a register
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static char what_reg(void); // what is letter of current YDreg
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static void check_context(char); // remember context for '' command
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#endif
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#if ENABLE_FEATURE_VI_CRASHME
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static void crash_dummy();
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static void crash_test();
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static int crashme = 0;
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#endif
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static void write1(const char *out)
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{
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fputs(out, stdout);
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}
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int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int vi_main(int argc, char **argv)
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{
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int c;
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INIT_G();
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#if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
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my_pid = getpid();
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#endif
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#if ENABLE_FEATURE_VI_CRASHME
|
|
srand((long) my_pid);
|
|
#endif
|
|
#ifdef NO_SUCH_APPLET_YET
|
|
/* If we aren't "vi", we are "view" */
|
|
if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) {
|
|
SET_READONLY_MODE(readonly_mode);
|
|
}
|
|
#endif
|
|
|
|
vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE;
|
|
#if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
|
|
modifying_cmds = (char *) "aAcCdDiIJoOpPrRsxX<>~"; // cmds modifying text[]
|
|
#endif
|
|
|
|
// 1- process $HOME/.exrc file (not inplemented yet)
|
|
// 2- process EXINIT variable from environment
|
|
// 3- process command line args
|
|
#if ENABLE_FEATURE_VI_COLON
|
|
{
|
|
char *p = getenv("EXINIT");
|
|
if (p && *p)
|
|
initial_cmds[0] = xstrndup(p, MAX_INPUT_LEN);
|
|
}
|
|
#endif
|
|
while ((c = getopt(argc, argv, "hCRH" USE_FEATURE_VI_COLON("c:"))) != -1) {
|
|
switch (c) {
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
case 'C':
|
|
crashme = 1;
|
|
break;
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_READONLY
|
|
case 'R': // Read-only flag
|
|
SET_READONLY_MODE(readonly_mode);
|
|
break;
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_COLON
|
|
case 'c': // cmd line vi command
|
|
if (*optarg)
|
|
initial_cmds[initial_cmds[0] != 0] = xstrndup(optarg, MAX_INPUT_LEN);
|
|
break;
|
|
#endif
|
|
case 'H':
|
|
show_help();
|
|
/* fall through */
|
|
default:
|
|
bb_show_usage();
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
// The argv array can be used by the ":next" and ":rewind" commands
|
|
// save optind.
|
|
fn_start = optind; // remember first file name for :next and :rew
|
|
save_argc = argc;
|
|
|
|
//----- This is the main file handling loop --------------
|
|
if (optind >= argc) {
|
|
edit_file(0);
|
|
} else {
|
|
for (; optind < argc; optind++) {
|
|
edit_file(argv[optind]);
|
|
}
|
|
}
|
|
//-----------------------------------------------------------
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* read text from file or create an empty buf */
|
|
/* will also update current_filename */
|
|
static int init_text_buffer(char *fn)
|
|
{
|
|
int rc;
|
|
int size = file_size(fn); // file size. -1 means does not exist.
|
|
|
|
/* allocate/reallocate text buffer */
|
|
free(text);
|
|
text_size = size + 10240;
|
|
screenbegin = dot = end = text = xzalloc(text_size);
|
|
|
|
if (fn != current_filename) {
|
|
free(current_filename);
|
|
current_filename = xstrdup(fn);
|
|
}
|
|
if (size < 0) {
|
|
// file dont exist. Start empty buf with dummy line
|
|
char_insert(text, '\n');
|
|
rc = 0;
|
|
} else {
|
|
rc = file_insert(fn, text
|
|
USE_FEATURE_VI_READONLY(, 1));
|
|
}
|
|
file_modified = 0;
|
|
last_file_modified = -1;
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
/* init the marks. */
|
|
memset(mark, 0, sizeof(mark));
|
|
#endif
|
|
return rc;
|
|
}
|
|
|
|
static void edit_file(char *fn)
|
|
{
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
#define cur_line edit_file__cur_line
|
|
#endif
|
|
char c;
|
|
int size;
|
|
#if ENABLE_FEATURE_VI_USE_SIGNALS
|
|
int sig;
|
|
#endif
|
|
|
|
editing = 1; // 0 = exit, 1 = one file, 2 = multiple files
|
|
rawmode();
|
|
rows = 24;
|
|
columns = 80;
|
|
size = 0;
|
|
if (ENABLE_FEATURE_VI_WIN_RESIZE) {
|
|
get_terminal_width_height(0, &columns, &rows);
|
|
if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
|
|
if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
|
|
}
|
|
new_screen(rows, columns); // get memory for virtual screen
|
|
init_text_buffer(fn);
|
|
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
YDreg = 26; // default Yank/Delete reg
|
|
Ureg = 27; // hold orig line for "U" cmd
|
|
mark[26] = mark[27] = text; // init "previous context"
|
|
#endif
|
|
|
|
last_forward_char = last_input_char = '\0';
|
|
crow = 0;
|
|
ccol = 0;
|
|
|
|
#if ENABLE_FEATURE_VI_USE_SIGNALS
|
|
catch_sig(0);
|
|
signal(SIGWINCH, winch_sig);
|
|
signal(SIGTSTP, suspend_sig);
|
|
sig = sigsetjmp(restart, 1);
|
|
if (sig != 0) {
|
|
screenbegin = dot = text;
|
|
}
|
|
#endif
|
|
|
|
cmd_mode = 0; // 0=command 1=insert 2='R'eplace
|
|
cmdcnt = 0;
|
|
tabstop = 8;
|
|
offset = 0; // no horizontal offset
|
|
c = '\0';
|
|
#if ENABLE_FEATURE_VI_DOT_CMD
|
|
free(ioq_start);
|
|
ioq = ioq_start = NULL;
|
|
lmc_len = 0;
|
|
adding2q = 0;
|
|
#endif
|
|
|
|
#if ENABLE_FEATURE_VI_COLON
|
|
{
|
|
char *p, *q;
|
|
int n = 0;
|
|
|
|
while ((p = initial_cmds[n])) {
|
|
do {
|
|
q = p;
|
|
p = strchr(q, '\n');
|
|
if (p)
|
|
while (*p == '\n')
|
|
*p++ = '\0';
|
|
if (*q)
|
|
colon(q);
|
|
} while (p);
|
|
free(initial_cmds[n]);
|
|
initial_cmds[n] = NULL;
|
|
n++;
|
|
}
|
|
}
|
|
#endif
|
|
redraw(FALSE); // dont force every col re-draw
|
|
//------This is the main Vi cmd handling loop -----------------------
|
|
while (editing > 0) {
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
if (crashme > 0) {
|
|
if ((end - text) > 1) {
|
|
crash_dummy(); // generate a random command
|
|
} else {
|
|
crashme = 0;
|
|
dot = string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
|
|
refresh(FALSE);
|
|
}
|
|
}
|
|
#endif
|
|
last_input_char = c = get_one_char(); // get a cmd from user
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
// save a copy of the current line- for the 'U" command
|
|
if (begin_line(dot) != cur_line) {
|
|
cur_line = begin_line(dot);
|
|
text_yank(begin_line(dot), end_line(dot), Ureg);
|
|
}
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_DOT_CMD
|
|
// These are commands that change text[].
|
|
// Remember the input for the "." command
|
|
if (!adding2q && ioq_start == NULL
|
|
&& strchr(modifying_cmds, c)
|
|
) {
|
|
start_new_cmd_q(c);
|
|
}
|
|
#endif
|
|
do_cmd(c); // execute the user command
|
|
//
|
|
// poll to see if there is input already waiting. if we are
|
|
// not able to display output fast enough to keep up, skip
|
|
// the display update until we catch up with input.
|
|
if (mysleep(0) == 0) {
|
|
// no input pending- so update output
|
|
refresh(FALSE);
|
|
show_status_line();
|
|
}
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
if (crashme > 0)
|
|
crash_test(); // test editor variables
|
|
#endif
|
|
}
|
|
//-------------------------------------------------------------------
|
|
|
|
place_cursor(rows, 0, FALSE); // go to bottom of screen
|
|
clear_to_eol(); // Erase to end of line
|
|
cookmode();
|
|
#undef cur_line
|
|
}
|
|
|
|
//----- The Colon commands -------------------------------------
|
|
#if ENABLE_FEATURE_VI_COLON
|
|
static char *get_one_address(char *p, int *addr) // get colon addr, if present
|
|
{
|
|
int st;
|
|
char *q;
|
|
USE_FEATURE_VI_YANKMARK(char c;)
|
|
USE_FEATURE_VI_SEARCH(char *pat;)
|
|
|
|
*addr = -1; // assume no addr
|
|
if (*p == '.') { // the current line
|
|
p++;
|
|
q = begin_line(dot);
|
|
*addr = count_lines(text, q);
|
|
}
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
else if (*p == '\'') { // is this a mark addr
|
|
p++;
|
|
c = tolower(*p);
|
|
p++;
|
|
if (c >= 'a' && c <= 'z') {
|
|
// we have a mark
|
|
c = c - 'a';
|
|
q = mark[(unsigned char) c];
|
|
if (q != NULL) { // is mark valid
|
|
*addr = count_lines(text, q); // count lines
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_SEARCH
|
|
else if (*p == '/') { // a search pattern
|
|
q = strchrnul(++p, '/');
|
|
pat = xstrndup(p, q - p); // save copy of pattern
|
|
p = q;
|
|
if (*p == '/')
|
|
p++;
|
|
q = char_search(dot, pat, FORWARD, FULL);
|
|
if (q != NULL) {
|
|
*addr = count_lines(text, q);
|
|
}
|
|
free(pat);
|
|
}
|
|
#endif
|
|
else if (*p == '$') { // the last line in file
|
|
p++;
|
|
q = begin_line(end - 1);
|
|
*addr = count_lines(text, q);
|
|
} else if (isdigit(*p)) { // specific line number
|
|
sscanf(p, "%d%n", addr, &st);
|
|
p += st;
|
|
} else {
|
|
// unrecognised address - assume -1
|
|
*addr = -1;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static char *get_address(char *p, int *b, int *e) // get two colon addrs, if present
|
|
{
|
|
//----- get the address' i.e., 1,3 'a,'b -----
|
|
// get FIRST addr, if present
|
|
while (isblank(*p))
|
|
p++; // skip over leading spaces
|
|
if (*p == '%') { // alias for 1,$
|
|
p++;
|
|
*b = 1;
|
|
*e = count_lines(text, end-1);
|
|
goto ga0;
|
|
}
|
|
p = get_one_address(p, b);
|
|
while (isblank(*p))
|
|
p++;
|
|
if (*p == ',') { // is there a address separator
|
|
p++;
|
|
while (isblank(*p))
|
|
p++;
|
|
// get SECOND addr, if present
|
|
p = get_one_address(p, e);
|
|
}
|
|
ga0:
|
|
while (isblank(*p))
|
|
p++; // skip over trailing spaces
|
|
return p;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS
|
|
static void setops(const char *args, const char *opname, int flg_no,
|
|
const char *short_opname, int opt)
|
|
{
|
|
const char *a = args + flg_no;
|
|
int l = strlen(opname) - 1; /* opname have + ' ' */
|
|
|
|
if (strncasecmp(a, opname, l) == 0
|
|
|| strncasecmp(a, short_opname, 2) == 0
|
|
) {
|
|
if (flg_no)
|
|
vi_setops &= ~opt;
|
|
else
|
|
vi_setops |= opt;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// buf must be no longer than MAX_INPUT_LEN!
|
|
static void colon(char *buf)
|
|
{
|
|
char c, *orig_buf, *buf1, *q, *r;
|
|
char *fn, cmd[MAX_INPUT_LEN], args[MAX_INPUT_LEN];
|
|
int i, l, li, ch, b, e;
|
|
int useforce, forced = FALSE;
|
|
|
|
// :3154 // if (-e line 3154) goto it else stay put
|
|
// :4,33w! foo // write a portion of buffer to file "foo"
|
|
// :w // write all of buffer to current file
|
|
// :q // quit
|
|
// :q! // quit- dont care about modified file
|
|
// :'a,'z!sort -u // filter block through sort
|
|
// :'f // goto mark "f"
|
|
// :'fl // list literal the mark "f" line
|
|
// :.r bar // read file "bar" into buffer before dot
|
|
// :/123/,/abc/d // delete lines from "123" line to "abc" line
|
|
// :/xyz/ // goto the "xyz" line
|
|
// :s/find/replace/ // substitute pattern "find" with "replace"
|
|
// :!<cmd> // run <cmd> then return
|
|
//
|
|
|
|
if (!buf[0])
|
|
goto vc1;
|
|
if (*buf == ':')
|
|
buf++; // move past the ':'
|
|
|
|
li = ch = i = 0;
|
|
b = e = -1;
|
|
q = text; // assume 1,$ for the range
|
|
r = end - 1;
|
|
li = count_lines(text, end - 1);
|
|
fn = current_filename;
|
|
|
|
// look for optional address(es) :. :1 :1,9 :'q,'a :%
|
|
buf = get_address(buf, &b, &e);
|
|
|
|
// remember orig command line
|
|
orig_buf = buf;
|
|
|
|
// get the COMMAND into cmd[]
|
|
buf1 = cmd;
|
|
while (*buf != '\0') {
|
|
if (isspace(*buf))
|
|
break;
|
|
*buf1++ = *buf++;
|
|
}
|
|
*buf1 = '\0';
|
|
// get any ARGuments
|
|
while (isblank(*buf))
|
|
buf++;
|
|
strcpy(args, buf);
|
|
useforce = FALSE;
|
|
buf1 = last_char_is(cmd, '!');
|
|
if (buf1) {
|
|
useforce = TRUE;
|
|
*buf1 = '\0'; // get rid of !
|
|
}
|
|
if (b >= 0) {
|
|
// if there is only one addr, then the addr
|
|
// is the line number of the single line the
|
|
// user wants. So, reset the end
|
|
// pointer to point at end of the "b" line
|
|
q = find_line(b); // what line is #b
|
|
r = end_line(q);
|
|
li = 1;
|
|
}
|
|
if (e >= 0) {
|
|
// we were given two addrs. change the
|
|
// end pointer to the addr given by user.
|
|
r = find_line(e); // what line is #e
|
|
r = end_line(r);
|
|
li = e - b + 1;
|
|
}
|
|
// ------------ now look for the command ------------
|
|
i = strlen(cmd);
|
|
if (i == 0) { // :123CR goto line #123
|
|
if (b >= 0) {
|
|
dot = find_line(b); // what line is #b
|
|
dot_skip_over_ws();
|
|
}
|
|
}
|
|
#if ENABLE_FEATURE_ALLOW_EXEC
|
|
else if (strncmp(cmd, "!", 1) == 0) { // run a cmd
|
|
int retcode;
|
|
// :!ls run the <cmd>
|
|
place_cursor(rows - 1, 0, FALSE); // go to Status line
|
|
clear_to_eol(); // clear the line
|
|
cookmode();
|
|
retcode = system(orig_buf + 1); // run the cmd
|
|
if (retcode)
|
|
printf("\nshell returned %i\n\n", retcode);
|
|
rawmode();
|
|
Hit_Return(); // let user see results
|
|
}
|
|
#endif
|
|
else if (strncmp(cmd, "=", i) == 0) { // where is the address
|
|
if (b < 0) { // no addr given- use defaults
|
|
b = e = count_lines(text, dot);
|
|
}
|
|
status_line("%d", b);
|
|
} else if (strncasecmp(cmd, "delete", i) == 0) { // delete lines
|
|
if (b < 0) { // no addr given- use defaults
|
|
q = begin_line(dot); // assume .,. for the range
|
|
r = end_line(dot);
|
|
}
|
|
dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
|
|
dot_skip_over_ws();
|
|
} else if (strncasecmp(cmd, "edit", i) == 0) { // Edit a file
|
|
// don't edit, if the current file has been modified
|
|
if (file_modified && !useforce) {
|
|
status_line_bold("No write since last change (:edit! overrides)");
|
|
goto vc1;
|
|
}
|
|
if (args[0]) {
|
|
// the user supplied a file name
|
|
fn = args;
|
|
} else if (current_filename && current_filename[0]) {
|
|
// no user supplied name- use the current filename
|
|
// fn = current_filename; was set by default
|
|
} else {
|
|
// no user file name, no current name- punt
|
|
status_line_bold("No current filename");
|
|
goto vc1;
|
|
}
|
|
|
|
if (init_text_buffer(fn) < 0)
|
|
goto vc1;
|
|
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
|
|
free(reg[Ureg]); // free orig line reg- for 'U'
|
|
reg[Ureg]= 0;
|
|
}
|
|
if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
|
|
free(reg[YDreg]); // free default yank/delete register
|
|
reg[YDreg]= 0;
|
|
}
|
|
#endif
|
|
// how many lines in text[]?
|
|
li = count_lines(text, end - 1);
|
|
status_line("\"%s\"%s"
|
|
USE_FEATURE_VI_READONLY("%s")
|
|
" %dL, %dC", current_filename,
|
|
(file_size(fn) < 0 ? " [New file]" : ""),
|
|
USE_FEATURE_VI_READONLY(
|
|
((readonly_mode) ? " [Readonly]" : ""),
|
|
)
|
|
li, ch);
|
|
} else if (strncasecmp(cmd, "file", i) == 0) { // what File is this
|
|
if (b != -1 || e != -1) {
|
|
not_implemented("No address allowed on this command");
|
|
goto vc1;
|
|
}
|
|
if (args[0]) {
|
|
// user wants a new filename
|
|
free(current_filename);
|
|
current_filename = xstrdup(args);
|
|
} else {
|
|
// user wants file status info
|
|
last_status_cksum = 0; // force status update
|
|
}
|
|
} else if (strncasecmp(cmd, "features", i) == 0) { // what features are available
|
|
// print out values of all features
|
|
place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
|
|
clear_to_eol(); // clear the line
|
|
cookmode();
|
|
show_help();
|
|
rawmode();
|
|
Hit_Return();
|
|
} else if (strncasecmp(cmd, "list", i) == 0) { // literal print line
|
|
if (b < 0) { // no addr given- use defaults
|
|
q = begin_line(dot); // assume .,. for the range
|
|
r = end_line(dot);
|
|
}
|
|
place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
|
|
clear_to_eol(); // clear the line
|
|
puts("\r");
|
|
for (; q <= r; q++) {
|
|
int c_is_no_print;
|
|
|
|
c = *q;
|
|
c_is_no_print = (c & 0x80) && !Isprint(c);
|
|
if (c_is_no_print) {
|
|
c = '.';
|
|
standout_start();
|
|
}
|
|
if (c == '\n') {
|
|
write1("$\r");
|
|
} else if (c < ' ' || c == 127) {
|
|
bb_putchar('^');
|
|
if (c == 127)
|
|
c = '?';
|
|
else
|
|
c += '@';
|
|
}
|
|
bb_putchar(c);
|
|
if (c_is_no_print)
|
|
standout_end();
|
|
}
|
|
#if ENABLE_FEATURE_VI_SET
|
|
vc2:
|
|
#endif
|
|
Hit_Return();
|
|
} else if (strncasecmp(cmd, "quit", i) == 0 // Quit
|
|
|| strncasecmp(cmd, "next", i) == 0 // edit next file
|
|
) {
|
|
if (useforce) {
|
|
// force end of argv list
|
|
if (*cmd == 'q') {
|
|
optind = save_argc;
|
|
}
|
|
editing = 0;
|
|
goto vc1;
|
|
}
|
|
// don't exit if the file been modified
|
|
if (file_modified) {
|
|
status_line_bold("No write since last change (:%s! overrides)",
|
|
(*cmd == 'q' ? "quit" : "next"));
|
|
goto vc1;
|
|
}
|
|
// are there other file to edit
|
|
if (*cmd == 'q' && optind < save_argc - 1) {
|
|
status_line_bold("%d more file to edit", (save_argc - optind - 1));
|
|
goto vc1;
|
|
}
|
|
if (*cmd == 'n' && optind >= save_argc - 1) {
|
|
status_line_bold("No more files to edit");
|
|
goto vc1;
|
|
}
|
|
editing = 0;
|
|
} else if (strncasecmp(cmd, "read", i) == 0) { // read file into text[]
|
|
fn = args;
|
|
if (!fn[0]) {
|
|
status_line_bold("No filename given");
|
|
goto vc1;
|
|
}
|
|
if (b < 0) { // no addr given- use defaults
|
|
q = begin_line(dot); // assume "dot"
|
|
}
|
|
// read after current line- unless user said ":0r foo"
|
|
if (b != 0)
|
|
q = next_line(q);
|
|
ch = file_insert(fn, q USE_FEATURE_VI_READONLY(, 0));
|
|
if (ch < 0)
|
|
goto vc1; // nothing was inserted
|
|
// how many lines in text[]?
|
|
li = count_lines(q, q + ch - 1);
|
|
status_line("\"%s\""
|
|
USE_FEATURE_VI_READONLY("%s")
|
|
" %dL, %dC", fn,
|
|
USE_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),)
|
|
li, ch);
|
|
if (ch > 0) {
|
|
// if the insert is before "dot" then we need to update
|
|
if (q <= dot)
|
|
dot += ch;
|
|
file_modified++;
|
|
}
|
|
} else if (strncasecmp(cmd, "rewind", i) == 0) { // rewind cmd line args
|
|
if (file_modified && !useforce) {
|
|
status_line_bold("No write since last change (:rewind! overrides)");
|
|
} else {
|
|
// reset the filenames to edit
|
|
optind = fn_start - 1;
|
|
editing = 0;
|
|
}
|
|
#if ENABLE_FEATURE_VI_SET
|
|
} else if (strncasecmp(cmd, "set", i) == 0) { // set or clear features
|
|
#if ENABLE_FEATURE_VI_SETOPTS
|
|
char *argp;
|
|
#endif
|
|
i = 0; // offset into args
|
|
// only blank is regarded as args delmiter. What about tab '\t' ?
|
|
if (!args[0] || strcasecmp(args, "all") == 0) {
|
|
// print out values of all options
|
|
place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
|
|
clear_to_eol(); // clear the line
|
|
printf("----------------------------------------\r\n");
|
|
#if ENABLE_FEATURE_VI_SETOPTS
|
|
if (!autoindent)
|
|
printf("no");
|
|
printf("autoindent ");
|
|
if (!err_method)
|
|
printf("no");
|
|
printf("flash ");
|
|
if (!ignorecase)
|
|
printf("no");
|
|
printf("ignorecase ");
|
|
if (!showmatch)
|
|
printf("no");
|
|
printf("showmatch ");
|
|
printf("tabstop=%d ", tabstop);
|
|
#endif
|
|
printf("\r\n");
|
|
goto vc2;
|
|
}
|
|
#if ENABLE_FEATURE_VI_SETOPTS
|
|
argp = args;
|
|
while (*argp) {
|
|
if (strncasecmp(argp, "no", 2) == 0)
|
|
i = 2; // ":set noautoindent"
|
|
setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT);
|
|
setops(argp, "flash ", i, "fl", VI_ERR_METHOD);
|
|
setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE);
|
|
setops(argp, "showmatch ", i, "ic", VI_SHOWMATCH);
|
|
/* tabstopXXXX */
|
|
if (strncasecmp(argp + i, "tabstop=%d ", 7) == 0) {
|
|
sscanf(strchr(argp + i, '='), "tabstop=%d" + 7, &ch);
|
|
if (ch > 0 && ch <= MAX_TABSTOP)
|
|
tabstop = ch;
|
|
}
|
|
while (*argp && *argp != ' ')
|
|
argp++; // skip to arg delimiter (i.e. blank)
|
|
while (*argp && *argp == ' ')
|
|
argp++; // skip all delimiting blanks
|
|
}
|
|
#endif /* FEATURE_VI_SETOPTS */
|
|
#endif /* FEATURE_VI_SET */
|
|
#if ENABLE_FEATURE_VI_SEARCH
|
|
} else if (strncasecmp(cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern
|
|
char *ls, *F, *R;
|
|
int gflag;
|
|
|
|
// F points to the "find" pattern
|
|
// R points to the "replace" pattern
|
|
// replace the cmd line delimiters "/" with NULLs
|
|
gflag = 0; // global replace flag
|
|
c = orig_buf[1]; // what is the delimiter
|
|
F = orig_buf + 2; // start of "find"
|
|
R = strchr(F, c); // middle delimiter
|
|
if (!R) goto colon_s_fail;
|
|
*R++ = '\0'; // terminate "find"
|
|
buf1 = strchr(R, c);
|
|
if (!buf1) goto colon_s_fail;
|
|
*buf1++ = '\0'; // terminate "replace"
|
|
if (*buf1 == 'g') { // :s/foo/bar/g
|
|
buf1++;
|
|
gflag++; // turn on gflag
|
|
}
|
|
q = begin_line(q);
|
|
if (b < 0) { // maybe :s/foo/bar/
|
|
q = begin_line(dot); // start with cur line
|
|
b = count_lines(text, q); // cur line number
|
|
}
|
|
if (e < 0)
|
|
e = b; // maybe :.s/foo/bar/
|
|
for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
|
|
ls = q; // orig line start
|
|
vc4:
|
|
buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
|
|
if (buf1) {
|
|
// we found the "find" pattern - delete it
|
|
text_hole_delete(buf1, buf1 + strlen(F) - 1);
|
|
// inset the "replace" patern
|
|
string_insert(buf1, R); // insert the string
|
|
// check for "global" :s/foo/bar/g
|
|
if (gflag == 1) {
|
|
if ((buf1 + strlen(R)) < end_line(ls)) {
|
|
q = buf1 + strlen(R);
|
|
goto vc4; // don't let q move past cur line
|
|
}
|
|
}
|
|
}
|
|
q = next_line(ls);
|
|
}
|
|
#endif /* FEATURE_VI_SEARCH */
|
|
} else if (strncasecmp(cmd, "version", i) == 0) { // show software version
|
|
status_line(BB_VER " " BB_BT);
|
|
} else if (strncasecmp(cmd, "write", i) == 0 // write text to file
|
|
|| strncasecmp(cmd, "wq", i) == 0
|
|
|| strncasecmp(cmd, "wn", i) == 0
|
|
|| strncasecmp(cmd, "x", i) == 0
|
|
) {
|
|
// is there a file name to write to?
|
|
if (args[0]) {
|
|
fn = args;
|
|
}
|
|
#if ENABLE_FEATURE_VI_READONLY
|
|
if (readonly_mode && !useforce) {
|
|
status_line_bold("\"%s\" File is read only", fn);
|
|
goto vc3;
|
|
}
|
|
#endif
|
|
// how many lines in text[]?
|
|
li = count_lines(q, r);
|
|
ch = r - q + 1;
|
|
// see if file exists- if not, its just a new file request
|
|
if (useforce) {
|
|
// if "fn" is not write-able, chmod u+w
|
|
// sprintf(syscmd, "chmod u+w %s", fn);
|
|
// system(syscmd);
|
|
forced = TRUE;
|
|
}
|
|
l = file_write(fn, q, r);
|
|
if (useforce && forced) {
|
|
// chmod u-w
|
|
// sprintf(syscmd, "chmod u-w %s", fn);
|
|
// system(syscmd);
|
|
forced = FALSE;
|
|
}
|
|
if (l < 0) {
|
|
if (l == -1)
|
|
status_line_bold("\"%s\" %s", fn, strerror(errno));
|
|
} else {
|
|
status_line("\"%s\" %dL, %dC", fn, li, l);
|
|
if (q == text && r == end - 1 && l == ch) {
|
|
file_modified = 0;
|
|
last_file_modified = -1;
|
|
}
|
|
if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n' ||
|
|
cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N')
|
|
&& l == ch) {
|
|
editing = 0;
|
|
}
|
|
}
|
|
#if ENABLE_FEATURE_VI_READONLY
|
|
vc3:;
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
} else if (strncasecmp(cmd, "yank", i) == 0) { // yank lines
|
|
if (b < 0) { // no addr given- use defaults
|
|
q = begin_line(dot); // assume .,. for the range
|
|
r = end_line(dot);
|
|
}
|
|
text_yank(q, r, YDreg);
|
|
li = count_lines(q, r);
|
|
status_line("Yank %d lines (%d chars) into [%c]",
|
|
li, strlen(reg[YDreg]), what_reg());
|
|
#endif
|
|
} else {
|
|
// cmd unknown
|
|
not_implemented(cmd);
|
|
}
|
|
vc1:
|
|
dot = bound_dot(dot); // make sure "dot" is valid
|
|
return;
|
|
#if ENABLE_FEATURE_VI_SEARCH
|
|
colon_s_fail:
|
|
status_line(":s expression missing delimiters");
|
|
#endif
|
|
}
|
|
|
|
#endif /* FEATURE_VI_COLON */
|
|
|
|
static void Hit_Return(void)
|
|
{
|
|
char c;
|
|
|
|
standout_start();
|
|
write1("[Hit return to continue]");
|
|
standout_end();
|
|
while ((c = get_one_char()) != '\n' && c != '\r')
|
|
continue;
|
|
redraw(TRUE); // force redraw all
|
|
}
|
|
|
|
static int next_tabstop(int col)
|
|
{
|
|
return col + ((tabstop - 1) - (col % tabstop));
|
|
}
|
|
|
|
//----- Synchronize the cursor to Dot --------------------------
|
|
static void sync_cursor(char *d, int *row, int *col)
|
|
{
|
|
char *beg_cur; // begin and end of "d" line
|
|
char *tp;
|
|
int cnt, ro, co;
|
|
|
|
beg_cur = begin_line(d); // first char of cur line
|
|
|
|
if (beg_cur < screenbegin) {
|
|
// "d" is before top line on screen
|
|
// how many lines do we have to move
|
|
cnt = count_lines(beg_cur, screenbegin);
|
|
sc1:
|
|
screenbegin = beg_cur;
|
|
if (cnt > (rows - 1) / 2) {
|
|
// we moved too many lines. put "dot" in middle of screen
|
|
for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
|
|
screenbegin = prev_line(screenbegin);
|
|
}
|
|
}
|
|
} else {
|
|
char *end_scr; // begin and end of screen
|
|
end_scr = end_screen(); // last char of screen
|
|
if (beg_cur > end_scr) {
|
|
// "d" is after bottom line on screen
|
|
// how many lines do we have to move
|
|
cnt = count_lines(end_scr, beg_cur);
|
|
if (cnt > (rows - 1) / 2)
|
|
goto sc1; // too many lines
|
|
for (ro = 0; ro < cnt - 1; ro++) {
|
|
// move screen begin the same amount
|
|
screenbegin = next_line(screenbegin);
|
|
// now, move the end of screen
|
|
end_scr = next_line(end_scr);
|
|
end_scr = end_line(end_scr);
|
|
}
|
|
}
|
|
}
|
|
// "d" is on screen- find out which row
|
|
tp = screenbegin;
|
|
for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
|
|
if (tp == beg_cur)
|
|
break;
|
|
tp = next_line(tp);
|
|
}
|
|
|
|
// find out what col "d" is on
|
|
co = 0;
|
|
while (tp < d) { // drive "co" to correct column
|
|
if (*tp == '\n') //vda || *tp == '\0')
|
|
break;
|
|
if (*tp == '\t') {
|
|
// handle tabs like real vi
|
|
if (d == tp && cmd_mode) {
|
|
break;
|
|
}
|
|
co = next_tabstop(co);
|
|
} else if ((unsigned char)*tp < ' ' || *tp == 0x7f) {
|
|
co++; // display as ^X, use 2 columns
|
|
}
|
|
co++;
|
|
tp++;
|
|
}
|
|
|
|
// "co" is the column where "dot" is.
|
|
// The screen has "columns" columns.
|
|
// The currently displayed columns are 0+offset -- columns+ofset
|
|
// |-------------------------------------------------------------|
|
|
// ^ ^ ^
|
|
// offset | |------- columns ----------------|
|
|
//
|
|
// If "co" is already in this range then we do not have to adjust offset
|
|
// but, we do have to subtract the "offset" bias from "co".
|
|
// If "co" is outside this range then we have to change "offset".
|
|
// If the first char of a line is a tab the cursor will try to stay
|
|
// in column 7, but we have to set offset to 0.
|
|
|
|
if (co < 0 + offset) {
|
|
offset = co;
|
|
}
|
|
if (co >= columns + offset) {
|
|
offset = co - columns + 1;
|
|
}
|
|
// if the first char of the line is a tab, and "dot" is sitting on it
|
|
// force offset to 0.
|
|
if (d == beg_cur && *d == '\t') {
|
|
offset = 0;
|
|
}
|
|
co -= offset;
|
|
|
|
*row = ro;
|
|
*col = co;
|
|
}
|
|
|
|
//----- Text Movement Routines ---------------------------------
|
|
static char *begin_line(char *p) // return pointer to first char cur line
|
|
{
|
|
if (p > text) {
|
|
p = memrchr(text, '\n', p - text);
|
|
if (!p)
|
|
return text;
|
|
return p + 1;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static char *end_line(char *p) // return pointer to NL of cur line
|
|
{
|
|
if (p < end - 1) {
|
|
p = memchr(p, '\n', end - p - 1);
|
|
if (!p)
|
|
return end - 1;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static char *dollar_line(char *p) // return pointer to just before NL line
|
|
{
|
|
p = end_line(p);
|
|
// Try to stay off of the Newline
|
|
if (*p == '\n' && (p - begin_line(p)) > 0)
|
|
p--;
|
|
return p;
|
|
}
|
|
|
|
static char *prev_line(char *p) // return pointer first char prev line
|
|
{
|
|
p = begin_line(p); // goto begining of cur line
|
|
if (p > text && p[-1] == '\n')
|
|
p--; // step to prev line
|
|
p = begin_line(p); // goto begining of prev line
|
|
return p;
|
|
}
|
|
|
|
static char *next_line(char *p) // return pointer first char next line
|
|
{
|
|
p = end_line(p);
|
|
if (p < end - 1 && *p == '\n')
|
|
p++; // step to next line
|
|
return p;
|
|
}
|
|
|
|
//----- Text Information Routines ------------------------------
|
|
static char *end_screen(void)
|
|
{
|
|
char *q;
|
|
int cnt;
|
|
|
|
// find new bottom line
|
|
q = screenbegin;
|
|
for (cnt = 0; cnt < rows - 2; cnt++)
|
|
q = next_line(q);
|
|
q = end_line(q);
|
|
return q;
|
|
}
|
|
|
|
// count line from start to stop
|
|
static int count_lines(char *start, char *stop)
|
|
{
|
|
char *q;
|
|
int cnt;
|
|
|
|
if (stop < start) { // start and stop are backwards- reverse them
|
|
q = start;
|
|
start = stop;
|
|
stop = q;
|
|
}
|
|
cnt = 0;
|
|
stop = end_line(stop);
|
|
while (start <= stop && start <= end - 1) {
|
|
start = end_line(start);
|
|
if (*start == '\n')
|
|
cnt++;
|
|
start++;
|
|
}
|
|
return cnt;
|
|
}
|
|
|
|
static char *find_line(int li) // find begining of line #li
|
|
{
|
|
char *q;
|
|
|
|
for (q = text; li > 1; li--) {
|
|
q = next_line(q);
|
|
}
|
|
return q;
|
|
}
|
|
|
|
//----- Dot Movement Routines ----------------------------------
|
|
static void dot_left(void)
|
|
{
|
|
if (dot > text && dot[-1] != '\n')
|
|
dot--;
|
|
}
|
|
|
|
static void dot_right(void)
|
|
{
|
|
if (dot < end - 1 && *dot != '\n')
|
|
dot++;
|
|
}
|
|
|
|
static void dot_begin(void)
|
|
{
|
|
dot = begin_line(dot); // return pointer to first char cur line
|
|
}
|
|
|
|
static void dot_end(void)
|
|
{
|
|
dot = end_line(dot); // return pointer to last char cur line
|
|
}
|
|
|
|
static char *move_to_col(char *p, int l)
|
|
{
|
|
int co;
|
|
|
|
p = begin_line(p);
|
|
co = 0;
|
|
while (co < l && p < end) {
|
|
if (*p == '\n') //vda || *p == '\0')
|
|
break;
|
|
if (*p == '\t') {
|
|
co = next_tabstop(co);
|
|
} else if (*p < ' ' || *p == 127) {
|
|
co++; // display as ^X, use 2 columns
|
|
}
|
|
co++;
|
|
p++;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static void dot_next(void)
|
|
{
|
|
dot = next_line(dot);
|
|
}
|
|
|
|
static void dot_prev(void)
|
|
{
|
|
dot = prev_line(dot);
|
|
}
|
|
|
|
static void dot_scroll(int cnt, int dir)
|
|
{
|
|
char *q;
|
|
|
|
for (; cnt > 0; cnt--) {
|
|
if (dir < 0) {
|
|
// scroll Backwards
|
|
// ctrl-Y scroll up one line
|
|
screenbegin = prev_line(screenbegin);
|
|
} else {
|
|
// scroll Forwards
|
|
// ctrl-E scroll down one line
|
|
screenbegin = next_line(screenbegin);
|
|
}
|
|
}
|
|
// make sure "dot" stays on the screen so we dont scroll off
|
|
if (dot < screenbegin)
|
|
dot = screenbegin;
|
|
q = end_screen(); // find new bottom line
|
|
if (dot > q)
|
|
dot = begin_line(q); // is dot is below bottom line?
|
|
dot_skip_over_ws();
|
|
}
|
|
|
|
static void dot_skip_over_ws(void)
|
|
{
|
|
// skip WS
|
|
while (isspace(*dot) && *dot != '\n' && dot < end - 1)
|
|
dot++;
|
|
}
|
|
|
|
static void dot_delete(void) // delete the char at 'dot'
|
|
{
|
|
text_hole_delete(dot, dot);
|
|
}
|
|
|
|
static char *bound_dot(char *p) // make sure text[0] <= P < "end"
|
|
{
|
|
if (p >= end && end > text) {
|
|
p = end - 1;
|
|
indicate_error('1');
|
|
}
|
|
if (p < text) {
|
|
p = text;
|
|
indicate_error('2');
|
|
}
|
|
return p;
|
|
}
|
|
|
|
//----- Helper Utility Routines --------------------------------
|
|
|
|
//----------------------------------------------------------------
|
|
//----- Char Routines --------------------------------------------
|
|
/* Chars that are part of a word-
|
|
* 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
|
|
* Chars that are Not part of a word (stoppers)
|
|
* !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
|
|
* Chars that are WhiteSpace
|
|
* TAB NEWLINE VT FF RETURN SPACE
|
|
* DO NOT COUNT NEWLINE AS WHITESPACE
|
|
*/
|
|
|
|
static char *new_screen(int ro, int co)
|
|
{
|
|
int li;
|
|
|
|
free(screen);
|
|
screensize = ro * co + 8;
|
|
screen = xmalloc(screensize);
|
|
// initialize the new screen. assume this will be a empty file.
|
|
screen_erase();
|
|
// non-existent text[] lines start with a tilde (~).
|
|
for (li = 1; li < ro - 1; li++) {
|
|
screen[(li * co) + 0] = '~';
|
|
}
|
|
return screen;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_VI_SEARCH
|
|
static int mycmp(const char *s1, const char *s2, int len)
|
|
{
|
|
int i;
|
|
|
|
i = strncmp(s1, s2, len);
|
|
if (ENABLE_FEATURE_VI_SETOPTS && ignorecase) {
|
|
i = strncasecmp(s1, s2, len);
|
|
}
|
|
return i;
|
|
}
|
|
|
|
// search for pattern starting at p
|
|
static char *char_search(char *p, const char *pat, int dir, int range)
|
|
{
|
|
#ifndef REGEX_SEARCH
|
|
char *start, *stop;
|
|
int len;
|
|
|
|
len = strlen(pat);
|
|
if (dir == FORWARD) {
|
|
stop = end - 1; // assume range is p - end-1
|
|
if (range == LIMITED)
|
|
stop = next_line(p); // range is to next line
|
|
for (start = p; start < stop; start++) {
|
|
if (mycmp(start, pat, len) == 0) {
|
|
return start;
|
|
}
|
|
}
|
|
} else if (dir == BACK) {
|
|
stop = text; // assume range is text - p
|
|
if (range == LIMITED)
|
|
stop = prev_line(p); // range is to prev line
|
|
for (start = p - len; start >= stop; start--) {
|
|
if (mycmp(start, pat, len) == 0) {
|
|
return start;
|
|
}
|
|
}
|
|
}
|
|
// pattern not found
|
|
return NULL;
|
|
#else /* REGEX_SEARCH */
|
|
char *q;
|
|
struct re_pattern_buffer preg;
|
|
int i;
|
|
int size, range;
|
|
|
|
re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
|
|
preg.translate = 0;
|
|
preg.fastmap = 0;
|
|
preg.buffer = 0;
|
|
preg.allocated = 0;
|
|
|
|
// assume a LIMITED forward search
|
|
q = next_line(p);
|
|
q = end_line(q);
|
|
q = end - 1;
|
|
if (dir == BACK) {
|
|
q = prev_line(p);
|
|
q = text;
|
|
}
|
|
// count the number of chars to search over, forward or backward
|
|
size = q - p;
|
|
if (size < 0)
|
|
size = p - q;
|
|
// RANGE could be negative if we are searching backwards
|
|
range = q - p;
|
|
|
|
q = re_compile_pattern(pat, strlen(pat), &preg);
|
|
if (q != 0) {
|
|
// The pattern was not compiled
|
|
status_line_bold("bad search pattern: \"%s\": %s", pat, q);
|
|
i = 0; // return p if pattern not compiled
|
|
goto cs1;
|
|
}
|
|
|
|
q = p;
|
|
if (range < 0) {
|
|
q = p - size;
|
|
if (q < text)
|
|
q = text;
|
|
}
|
|
// search for the compiled pattern, preg, in p[]
|
|
// range < 0- search backward
|
|
// range > 0- search forward
|
|
// 0 < start < size
|
|
// re_search() < 0 not found or error
|
|
// re_search() > 0 index of found pattern
|
|
// struct pattern char int int int struct reg
|
|
// re_search (*pattern_buffer, *string, size, start, range, *regs)
|
|
i = re_search(&preg, q, size, 0, range, 0);
|
|
if (i == -1) {
|
|
p = 0;
|
|
i = 0; // return NULL if pattern not found
|
|
}
|
|
cs1:
|
|
if (dir == FORWARD) {
|
|
p = p + i;
|
|
} else {
|
|
p = p - i;
|
|
}
|
|
return p;
|
|
#endif /* REGEX_SEARCH */
|
|
}
|
|
#endif /* FEATURE_VI_SEARCH */
|
|
|
|
static char *char_insert(char *p, char c) // insert the char c at 'p'
|
|
{
|
|
if (c == 22) { // Is this an ctrl-V?
|
|
p = stupid_insert(p, '^'); // use ^ to indicate literal next
|
|
p--; // backup onto ^
|
|
refresh(FALSE); // show the ^
|
|
c = get_one_char();
|
|
*p = c;
|
|
p++;
|
|
file_modified++;
|
|
} else if (c == 27) { // Is this an ESC?
|
|
cmd_mode = 0;
|
|
cmdcnt = 0;
|
|
end_cmd_q(); // stop adding to q
|
|
last_status_cksum = 0; // force status update
|
|
if ((p[-1] != '\n') && (dot > text)) {
|
|
p--;
|
|
}
|
|
} else if (c == erase_char || c == 8 || c == 127) { // Is this a BS
|
|
// 123456789
|
|
if ((p[-1] != '\n') && (dot>text)) {
|
|
p--;
|
|
p = text_hole_delete(p, p); // shrink buffer 1 char
|
|
}
|
|
} else {
|
|
// insert a char into text[]
|
|
char *sp; // "save p"
|
|
|
|
if (c == 13)
|
|
c = '\n'; // translate \r to \n
|
|
sp = p; // remember addr of insert
|
|
p = stupid_insert(p, c); // insert the char
|
|
#if ENABLE_FEATURE_VI_SETOPTS
|
|
if (showmatch && strchr(")]}", *sp) != NULL) {
|
|
showmatching(sp);
|
|
}
|
|
if (autoindent && c == '\n') { // auto indent the new line
|
|
char *q;
|
|
|
|
q = prev_line(p); // use prev line as templet
|
|
for (; isblank(*q); q++) {
|
|
p = stupid_insert(p, *q); // insert the char
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static char *stupid_insert(char *p, char c) // stupidly insert the char c at 'p'
|
|
{
|
|
p = text_hole_make(p, 1);
|
|
*p = c;
|
|
//file_modified++; - done by text_hole_make()
|
|
return p + 1;
|
|
}
|
|
|
|
static int find_range(char **start, char **stop, char c)
|
|
{
|
|
char *save_dot, *p, *q, *t;
|
|
int cnt, multiline = 0;
|
|
|
|
save_dot = dot;
|
|
p = q = dot;
|
|
|
|
if (strchr("cdy><", c)) {
|
|
// these cmds operate on whole lines
|
|
p = q = begin_line(p);
|
|
for (cnt = 1; cnt < cmdcnt; cnt++) {
|
|
q = next_line(q);
|
|
}
|
|
q = end_line(q);
|
|
} else if (strchr("^%$0bBeEfth\b\177", c)) {
|
|
// These cmds operate on char positions
|
|
do_cmd(c); // execute movement cmd
|
|
q = dot;
|
|
} else if (strchr("wW", c)) {
|
|
do_cmd(c); // execute movement cmd
|
|
// if we are at the next word's first char
|
|
// step back one char
|
|
// but check the possibilities when it is true
|
|
if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0]))
|
|
|| (ispunct(dot[-1]) && !ispunct(dot[0]))
|
|
|| (isalnum(dot[-1]) && !isalnum(dot[0]))))
|
|
dot--; // move back off of next word
|
|
if (dot > text && *dot == '\n')
|
|
dot--; // stay off NL
|
|
q = dot;
|
|
} else if (strchr("H-k{", c)) {
|
|
// these operate on multi-lines backwards
|
|
q = end_line(dot); // find NL
|
|
do_cmd(c); // execute movement cmd
|
|
dot_begin();
|
|
p = dot;
|
|
} else if (strchr("L+j}\r\n", c)) {
|
|
// these operate on multi-lines forwards
|
|
p = begin_line(dot);
|
|
do_cmd(c); // execute movement cmd
|
|
dot_end(); // find NL
|
|
q = dot;
|
|
} else {
|
|
// nothing -- this causes any other values of c to
|
|
// represent the one-character range under the
|
|
// cursor. this is correct for ' ' and 'l', but
|
|
// perhaps no others.
|
|
//
|
|
}
|
|
if (q < p) {
|
|
t = q;
|
|
q = p;
|
|
p = t;
|
|
}
|
|
|
|
// backward char movements don't include start position
|
|
if (q > p && strchr("^0bBh\b\177", c)) q--;
|
|
|
|
multiline = 0;
|
|
for (t = p; t <= q; t++) {
|
|
if (*t == '\n') {
|
|
multiline = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
*start = p;
|
|
*stop = q;
|
|
dot = save_dot;
|
|
return multiline;
|
|
}
|
|
|
|
static int st_test(char *p, int type, int dir, char *tested)
|
|
{
|
|
char c, c0, ci;
|
|
int test, inc;
|
|
|
|
inc = dir;
|
|
c = c0 = p[0];
|
|
ci = p[inc];
|
|
test = 0;
|
|
|
|
if (type == S_BEFORE_WS) {
|
|
c = ci;
|
|
test = ((!isspace(c)) || c == '\n');
|
|
}
|
|
if (type == S_TO_WS) {
|
|
c = c0;
|
|
test = ((!isspace(c)) || c == '\n');
|
|
}
|
|
if (type == S_OVER_WS) {
|
|
c = c0;
|
|
test = ((isspace(c)));
|
|
}
|
|
if (type == S_END_PUNCT) {
|
|
c = ci;
|
|
test = ((ispunct(c)));
|
|
}
|
|
if (type == S_END_ALNUM) {
|
|
c = ci;
|
|
test = ((isalnum(c)) || c == '_');
|
|
}
|
|
*tested = c;
|
|
return test;
|
|
}
|
|
|
|
static char *skip_thing(char *p, int linecnt, int dir, int type)
|
|
{
|
|
char c;
|
|
|
|
while (st_test(p, type, dir, &c)) {
|
|
// make sure we limit search to correct number of lines
|
|
if (c == '\n' && --linecnt < 1)
|
|
break;
|
|
if (dir >= 0 && p >= end - 1)
|
|
break;
|
|
if (dir < 0 && p <= text)
|
|
break;
|
|
p += dir; // move to next char
|
|
}
|
|
return p;
|
|
}
|
|
|
|
// find matching char of pair () [] {}
|
|
static char *find_pair(char *p, const char c)
|
|
{
|
|
char match, *q;
|
|
int dir, level;
|
|
|
|
match = ')';
|
|
level = 1;
|
|
dir = 1; // assume forward
|
|
switch (c) {
|
|
case '(': match = ')'; break;
|
|
case '[': match = ']'; break;
|
|
case '{': match = '}'; break;
|
|
case ')': match = '('; dir = -1; break;
|
|
case ']': match = '['; dir = -1; break;
|
|
case '}': match = '{'; dir = -1; break;
|
|
}
|
|
for (q = p + dir; text <= q && q < end; q += dir) {
|
|
// look for match, count levels of pairs (( ))
|
|
if (*q == c)
|
|
level++; // increase pair levels
|
|
if (*q == match)
|
|
level--; // reduce pair level
|
|
if (level == 0)
|
|
break; // found matching pair
|
|
}
|
|
if (level != 0)
|
|
q = NULL; // indicate no match
|
|
return q;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_VI_SETOPTS
|
|
// show the matching char of a pair, () [] {}
|
|
static void showmatching(char *p)
|
|
{
|
|
char *q, *save_dot;
|
|
|
|
// we found half of a pair
|
|
q = find_pair(p, *p); // get loc of matching char
|
|
if (q == NULL) {
|
|
indicate_error('3'); // no matching char
|
|
} else {
|
|
// "q" now points to matching pair
|
|
save_dot = dot; // remember where we are
|
|
dot = q; // go to new loc
|
|
refresh(FALSE); // let the user see it
|
|
mysleep(40); // give user some time
|
|
dot = save_dot; // go back to old loc
|
|
refresh(FALSE);
|
|
}
|
|
}
|
|
#endif /* FEATURE_VI_SETOPTS */
|
|
|
|
// open a hole in text[]
|
|
static char *text_hole_make(char *p, int size) // at "p", make a 'size' byte hole
|
|
{
|
|
if (size <= 0)
|
|
return p;
|
|
end += size; // adjust the new END
|
|
if (end >= (text + text_size)) {
|
|
char *new_text;
|
|
text_size += end - (text + text_size) + 10240;
|
|
new_text = xrealloc(text, text_size);
|
|
screenbegin = new_text + (screenbegin - text);
|
|
dot = new_text + (dot - text);
|
|
end = new_text + (end - text);
|
|
p = new_text + (p - text);
|
|
text = new_text;
|
|
}
|
|
memset(p, ' ', size); // clear new hole
|
|
file_modified++;
|
|
return p;
|
|
}
|
|
|
|
// close a hole in text[]
|
|
static char *text_hole_delete(char *p, char *q) // delete "p" through "q", inclusive
|
|
{
|
|
char *src, *dest;
|
|
int cnt, hole_size;
|
|
|
|
// move forwards, from beginning
|
|
// assume p <= q
|
|
src = q + 1;
|
|
dest = p;
|
|
if (q < p) { // they are backward- swap them
|
|
src = p + 1;
|
|
dest = q;
|
|
}
|
|
hole_size = q - p + 1;
|
|
cnt = end - src;
|
|
if (src < text || src > end)
|
|
goto thd0;
|
|
if (dest < text || dest >= end)
|
|
goto thd0;
|
|
if (src >= end)
|
|
goto thd_atend; // just delete the end of the buffer
|
|
memmove(dest, src, cnt);
|
|
thd_atend:
|
|
end = end - hole_size; // adjust the new END
|
|
if (dest >= end)
|
|
dest = end - 1; // make sure dest in below end-1
|
|
if (end <= text)
|
|
dest = end = text; // keep pointers valid
|
|
file_modified++;
|
|
thd0:
|
|
return dest;
|
|
}
|
|
|
|
// copy text into register, then delete text.
|
|
// if dist <= 0, do not include, or go past, a NewLine
|
|
//
|
|
static char *yank_delete(char *start, char *stop, int dist, int yf)
|
|
{
|
|
char *p;
|
|
|
|
// make sure start <= stop
|
|
if (start > stop) {
|
|
// they are backwards, reverse them
|
|
p = start;
|
|
start = stop;
|
|
stop = p;
|
|
}
|
|
if (dist <= 0) {
|
|
// we cannot cross NL boundaries
|
|
p = start;
|
|
if (*p == '\n')
|
|
return p;
|
|
// dont go past a NewLine
|
|
for (; p + 1 <= stop; p++) {
|
|
if (p[1] == '\n') {
|
|
stop = p; // "stop" just before NewLine
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
p = start;
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
text_yank(start, stop, YDreg);
|
|
#endif
|
|
if (yf == YANKDEL) {
|
|
p = text_hole_delete(start, stop);
|
|
} // delete lines
|
|
return p;
|
|
}
|
|
|
|
static void show_help(void)
|
|
{
|
|
puts("These features are available:"
|
|
#if ENABLE_FEATURE_VI_SEARCH
|
|
"\n\tPattern searches with / and ?"
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_DOT_CMD
|
|
"\n\tLast command repeat with \'.\'"
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
"\n\tLine marking with 'x"
|
|
"\n\tNamed buffers with \"x"
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_READONLY
|
|
"\n\tReadonly if vi is called as \"view\""
|
|
"\n\tReadonly with -R command line arg"
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_SET
|
|
"\n\tSome colon mode commands with \':\'"
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_SETOPTS
|
|
"\n\tSettable options with \":set\""
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_USE_SIGNALS
|
|
"\n\tSignal catching- ^C"
|
|
"\n\tJob suspend and resume with ^Z"
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_WIN_RESIZE
|
|
"\n\tAdapt to window re-sizes"
|
|
#endif
|
|
);
|
|
}
|
|
|
|
#if ENABLE_FEATURE_VI_DOT_CMD
|
|
static void start_new_cmd_q(char c)
|
|
{
|
|
// get buffer for new cmd
|
|
// if there is a current cmd count put it in the buffer first
|
|
if (cmdcnt > 0)
|
|
lmc_len = sprintf(last_modifying_cmd, "%d%c", cmdcnt, c);
|
|
else { // just save char c onto queue
|
|
last_modifying_cmd[0] = c;
|
|
lmc_len = 1;
|
|
}
|
|
adding2q = 1;
|
|
}
|
|
|
|
static void end_cmd_q(void)
|
|
{
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
YDreg = 26; // go back to default Yank/Delete reg
|
|
#endif
|
|
adding2q = 0;
|
|
}
|
|
#endif /* FEATURE_VI_DOT_CMD */
|
|
|
|
#if ENABLE_FEATURE_VI_YANKMARK \
|
|
|| (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \
|
|
|| ENABLE_FEATURE_VI_CRASHME
|
|
static char *string_insert(char *p, char *s) // insert the string at 'p'
|
|
{
|
|
int cnt, i;
|
|
|
|
i = strlen(s);
|
|
text_hole_make(p, i);
|
|
strncpy(p, s, i);
|
|
for (cnt = 0; *s != '\0'; s++) {
|
|
if (*s == '\n')
|
|
cnt++;
|
|
}
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
status_line("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
|
|
#endif
|
|
return p;
|
|
}
|
|
#endif
|
|
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
static char *text_yank(char *p, char *q, int dest) // copy text into a register
|
|
{
|
|
char *t;
|
|
int cnt;
|
|
|
|
if (q < p) { // they are backwards- reverse them
|
|
t = q;
|
|
q = p;
|
|
p = t;
|
|
}
|
|
cnt = q - p + 1;
|
|
t = reg[dest];
|
|
free(t); // if already a yank register, free it
|
|
t = xmalloc(cnt + 1); // get a new register
|
|
memset(t, '\0', cnt + 1); // clear new text[]
|
|
strncpy(t, p, cnt); // copy text[] into bufer
|
|
reg[dest] = t;
|
|
return p;
|
|
}
|
|
|
|
static char what_reg(void)
|
|
{
|
|
char c;
|
|
|
|
c = 'D'; // default to D-reg
|
|
if (0 <= YDreg && YDreg <= 25)
|
|
c = 'a' + (char) YDreg;
|
|
if (YDreg == 26)
|
|
c = 'D';
|
|
if (YDreg == 27)
|
|
c = 'U';
|
|
return c;
|
|
}
|
|
|
|
static void check_context(char cmd)
|
|
{
|
|
// A context is defined to be "modifying text"
|
|
// Any modifying command establishes a new context.
|
|
|
|
if (dot < context_start || dot > context_end) {
|
|
if (strchr(modifying_cmds, cmd) != NULL) {
|
|
// we are trying to modify text[]- make this the current context
|
|
mark[27] = mark[26]; // move cur to prev
|
|
mark[26] = dot; // move local to cur
|
|
context_start = prev_line(prev_line(dot));
|
|
context_end = next_line(next_line(dot));
|
|
//loiter= start_loiter= now;
|
|
}
|
|
}
|
|
}
|
|
|
|
static char *swap_context(char *p) // goto new context for '' command make this the current context
|
|
{
|
|
char *tmp;
|
|
|
|
// the current context is in mark[26]
|
|
// the previous context is in mark[27]
|
|
// only swap context if other context is valid
|
|
if (text <= mark[27] && mark[27] <= end - 1) {
|
|
tmp = mark[27];
|
|
mark[27] = mark[26];
|
|
mark[26] = tmp;
|
|
p = mark[26]; // where we are going- previous context
|
|
context_start = prev_line(prev_line(prev_line(p)));
|
|
context_end = next_line(next_line(next_line(p)));
|
|
}
|
|
return p;
|
|
}
|
|
#endif /* FEATURE_VI_YANKMARK */
|
|
|
|
//----- Set terminal attributes --------------------------------
|
|
static void rawmode(void)
|
|
{
|
|
tcgetattr(0, &term_orig);
|
|
term_vi = term_orig;
|
|
term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
|
|
term_vi.c_iflag &= (~IXON & ~ICRNL);
|
|
term_vi.c_oflag &= (~ONLCR);
|
|
term_vi.c_cc[VMIN] = 1;
|
|
term_vi.c_cc[VTIME] = 0;
|
|
erase_char = term_vi.c_cc[VERASE];
|
|
tcsetattr(0, TCSANOW, &term_vi);
|
|
}
|
|
|
|
static void cookmode(void)
|
|
{
|
|
fflush(stdout);
|
|
tcsetattr(0, TCSANOW, &term_orig);
|
|
}
|
|
|
|
//----- Come here when we get a window resize signal ---------
|
|
#if ENABLE_FEATURE_VI_USE_SIGNALS
|
|
static void winch_sig(int sig ATTRIBUTE_UNUSED)
|
|
{
|
|
// FIXME: do it in main loop!!!
|
|
signal(SIGWINCH, winch_sig);
|
|
if (ENABLE_FEATURE_VI_WIN_RESIZE) {
|
|
get_terminal_width_height(0, &columns, &rows);
|
|
if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
|
|
if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
|
|
}
|
|
new_screen(rows, columns); // get memory for virtual screen
|
|
redraw(TRUE); // re-draw the screen
|
|
}
|
|
|
|
//----- Come here when we get a continue signal -------------------
|
|
static void cont_sig(int sig ATTRIBUTE_UNUSED)
|
|
{
|
|
rawmode(); // terminal to "raw"
|
|
last_status_cksum = 0; // force status update
|
|
redraw(TRUE); // re-draw the screen
|
|
|
|
signal(SIGTSTP, suspend_sig);
|
|
signal(SIGCONT, SIG_DFL);
|
|
kill(my_pid, SIGCONT);
|
|
}
|
|
|
|
//----- Come here when we get a Suspend signal -------------------
|
|
static void suspend_sig(int sig ATTRIBUTE_UNUSED)
|
|
{
|
|
place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
|
|
clear_to_eol(); // Erase to end of line
|
|
cookmode(); // terminal to "cooked"
|
|
|
|
signal(SIGCONT, cont_sig);
|
|
signal(SIGTSTP, SIG_DFL);
|
|
kill(my_pid, SIGTSTP);
|
|
}
|
|
|
|
//----- Come here when we get a signal ---------------------------
|
|
static void catch_sig(int sig)
|
|
{
|
|
signal(SIGINT, catch_sig);
|
|
if (sig)
|
|
siglongjmp(restart, sig);
|
|
}
|
|
#endif /* FEATURE_VI_USE_SIGNALS */
|
|
|
|
static int mysleep(int hund) // sleep for 'h' 1/100 seconds
|
|
{
|
|
struct pollfd pfd[1];
|
|
|
|
pfd[0].fd = 0;
|
|
pfd[0].events = POLLIN;
|
|
return safe_poll(pfd, 1, hund*10) > 0;
|
|
}
|
|
|
|
//----- IO Routines --------------------------------------------
|
|
static char readit(void) // read (maybe cursor) key from stdin
|
|
{
|
|
char c;
|
|
int n;
|
|
struct esc_cmds {
|
|
const char seq[4];
|
|
char val;
|
|
};
|
|
|
|
static const struct esc_cmds esccmds[] = {
|
|
{"OA" , VI_K_UP }, // cursor key Up
|
|
{"OB" , VI_K_DOWN }, // cursor key Down
|
|
{"OC" , VI_K_RIGHT }, // Cursor Key Right
|
|
{"OD" , VI_K_LEFT }, // cursor key Left
|
|
{"OH" , VI_K_HOME }, // Cursor Key Home
|
|
{"OF" , VI_K_END }, // Cursor Key End
|
|
{"[A" , VI_K_UP }, // cursor key Up
|
|
{"[B" , VI_K_DOWN }, // cursor key Down
|
|
{"[C" , VI_K_RIGHT }, // Cursor Key Right
|
|
{"[D" , VI_K_LEFT }, // cursor key Left
|
|
{"[H" , VI_K_HOME }, // Cursor Key Home
|
|
{"[F" , VI_K_END }, // Cursor Key End
|
|
{"[1~" , VI_K_HOME }, // Cursor Key Home
|
|
{"[2~" , VI_K_INSERT }, // Cursor Key Insert
|
|
{"[3~" , VI_K_DELETE }, // Cursor Key Delete
|
|
{"[4~" , VI_K_END }, // Cursor Key End
|
|
{"[5~" , VI_K_PAGEUP }, // Cursor Key Page Up
|
|
{"[6~" , VI_K_PAGEDOWN}, // Cursor Key Page Down
|
|
{"OP" , VI_K_FUN1 }, // Function Key F1
|
|
{"OQ" , VI_K_FUN2 }, // Function Key F2
|
|
{"OR" , VI_K_FUN3 }, // Function Key F3
|
|
{"OS" , VI_K_FUN4 }, // Function Key F4
|
|
// careful: these have no terminating NUL!
|
|
{"[11~", VI_K_FUN1 }, // Function Key F1
|
|
{"[12~", VI_K_FUN2 }, // Function Key F2
|
|
{"[13~", VI_K_FUN3 }, // Function Key F3
|
|
{"[14~", VI_K_FUN4 }, // Function Key F4
|
|
{"[15~", VI_K_FUN5 }, // Function Key F5
|
|
{"[17~", VI_K_FUN6 }, // Function Key F6
|
|
{"[18~", VI_K_FUN7 }, // Function Key F7
|
|
{"[19~", VI_K_FUN8 }, // Function Key F8
|
|
{"[20~", VI_K_FUN9 }, // Function Key F9
|
|
{"[21~", VI_K_FUN10 }, // Function Key F10
|
|
{"[23~", VI_K_FUN11 }, // Function Key F11
|
|
{"[24~", VI_K_FUN12 }, // Function Key F12
|
|
};
|
|
enum { ESCCMDS_COUNT = ARRAY_SIZE(esccmds) };
|
|
|
|
fflush(stdout);
|
|
n = chars_to_parse;
|
|
// get input from User- are there already input chars in Q?
|
|
if (n <= 0) {
|
|
// the Q is empty, wait for a typed char
|
|
n = safe_read(STDIN_FILENO, readbuffer, sizeof(readbuffer));
|
|
if (n < 0) {
|
|
if (errno == EBADF || errno == EFAULT || errno == EINVAL
|
|
|| errno == EIO)
|
|
editing = 0; // want to exit
|
|
errno = 0;
|
|
}
|
|
if (n <= 0)
|
|
return 0; // error
|
|
if (readbuffer[0] == 27) {
|
|
// This is an ESC char. Is this Esc sequence?
|
|
// Could be bare Esc key. See if there are any
|
|
// more chars to read after the ESC. This would
|
|
// be a Function or Cursor Key sequence.
|
|
struct pollfd pfd[1];
|
|
pfd[0].fd = 0;
|
|
pfd[0].events = POLLIN;
|
|
// keep reading while there are input chars, and room in buffer
|
|
// for a complete ESC sequence (assuming 8 chars is enough)
|
|
while ((safe_poll(pfd, 1, 0) > 0)
|
|
&& ((size_t)n <= (sizeof(readbuffer) - 8))
|
|
) {
|
|
// read the rest of the ESC string
|
|
int r = safe_read(STDIN_FILENO, readbuffer + n, sizeof(readbuffer) - n);
|
|
if (r > 0)
|
|
n += r;
|
|
}
|
|
}
|
|
chars_to_parse = n;
|
|
}
|
|
c = readbuffer[0];
|
|
if (c == 27 && n > 1) {
|
|
// Maybe cursor or function key?
|
|
const struct esc_cmds *eindex;
|
|
|
|
for (eindex = esccmds; eindex < &esccmds[ESCCMDS_COUNT]; eindex++) {
|
|
int cnt = strnlen(eindex->seq, 4);
|
|
if (n <= cnt)
|
|
continue;
|
|
if (strncmp(eindex->seq, readbuffer + 1, cnt) != 0)
|
|
continue;
|
|
c = eindex->val; // magic char value
|
|
n = cnt + 1; // squeeze out the ESC sequence
|
|
goto found;
|
|
}
|
|
// defined ESC sequence not found
|
|
}
|
|
n = 1;
|
|
found:
|
|
// remove key sequence from Q
|
|
chars_to_parse -= n;
|
|
memmove(readbuffer, readbuffer + n, sizeof(readbuffer) - n);
|
|
return c;
|
|
}
|
|
|
|
//----- IO Routines --------------------------------------------
|
|
static char get_one_char(void)
|
|
{
|
|
char c;
|
|
|
|
#if ENABLE_FEATURE_VI_DOT_CMD
|
|
if (!adding2q) {
|
|
// we are not adding to the q.
|
|
// but, we may be reading from a q
|
|
if (ioq == 0) {
|
|
// there is no current q, read from STDIN
|
|
c = readit(); // get the users input
|
|
} else {
|
|
// there is a queue to get chars from first
|
|
c = *ioq++;
|
|
if (c == '\0') {
|
|
// the end of the q, read from STDIN
|
|
free(ioq_start);
|
|
ioq_start = ioq = 0;
|
|
c = readit(); // get the users input
|
|
}
|
|
}
|
|
} else {
|
|
// adding STDIN chars to q
|
|
c = readit(); // get the users input
|
|
if (lmc_len >= MAX_INPUT_LEN - 1) {
|
|
status_line_bold("last_modifying_cmd overrun");
|
|
} else {
|
|
// add new char to q
|
|
last_modifying_cmd[lmc_len++] = c;
|
|
}
|
|
}
|
|
#else
|
|
c = readit(); // get the users input
|
|
#endif /* FEATURE_VI_DOT_CMD */
|
|
return c;
|
|
}
|
|
|
|
// Get input line (uses "status line" area)
|
|
static char *get_input_line(const char *prompt)
|
|
{
|
|
// char [MAX_INPUT_LEN]
|
|
#define buf get_input_line__buf
|
|
|
|
char c;
|
|
int i;
|
|
|
|
strcpy(buf, prompt);
|
|
last_status_cksum = 0; // force status update
|
|
place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
|
|
clear_to_eol(); // clear the line
|
|
write1(prompt); // write out the :, /, or ? prompt
|
|
|
|
i = strlen(buf);
|
|
while (i < MAX_INPUT_LEN) {
|
|
c = get_one_char();
|
|
if (c == '\n' || c == '\r' || c == 27)
|
|
break; // this is end of input
|
|
if (c == erase_char || c == 8 || c == 127) {
|
|
// user wants to erase prev char
|
|
buf[--i] = '\0';
|
|
write1("\b \b"); // erase char on screen
|
|
if (i <= 0) // user backs up before b-o-l, exit
|
|
break;
|
|
} else {
|
|
buf[i] = c;
|
|
buf[++i] = '\0';
|
|
bb_putchar(c);
|
|
}
|
|
}
|
|
refresh(FALSE);
|
|
return buf;
|
|
#undef buf
|
|
}
|
|
|
|
static int file_size(const char *fn) // what is the byte size of "fn"
|
|
{
|
|
struct stat st_buf;
|
|
int cnt;
|
|
|
|
cnt = -1;
|
|
if (fn && fn[0] && stat(fn, &st_buf) == 0) // see if file exists
|
|
cnt = (int) st_buf.st_size;
|
|
return cnt;
|
|
}
|
|
|
|
static int file_insert(const char *fn, char *p
|
|
USE_FEATURE_VI_READONLY(, int update_ro_status))
|
|
{
|
|
int cnt = -1;
|
|
int fd, size;
|
|
struct stat statbuf;
|
|
|
|
/* Validate file */
|
|
if (stat(fn, &statbuf) < 0) {
|
|
status_line_bold("\"%s\" %s", fn, strerror(errno));
|
|
goto fi0;
|
|
}
|
|
if (!S_ISREG(statbuf.st_mode)) {
|
|
// This is not a regular file
|
|
status_line_bold("\"%s\" Not a regular file", fn);
|
|
goto fi0;
|
|
}
|
|
if (p < text || p > end) {
|
|
status_line_bold("Trying to insert file outside of memory");
|
|
goto fi0;
|
|
}
|
|
|
|
// read file to buffer
|
|
fd = open(fn, O_RDONLY);
|
|
if (fd < 0) {
|
|
status_line_bold("\"%s\" %s", fn, strerror(errno));
|
|
goto fi0;
|
|
}
|
|
size = statbuf.st_size;
|
|
p = text_hole_make(p, size);
|
|
cnt = safe_read(fd, p, size);
|
|
if (cnt < 0) {
|
|
status_line_bold("\"%s\" %s", fn, strerror(errno));
|
|
p = text_hole_delete(p, p + size - 1); // un-do buffer insert
|
|
} else if (cnt < size) {
|
|
// There was a partial read, shrink unused space text[]
|
|
p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
|
|
status_line_bold("cannot read all of file \"%s\"", fn);
|
|
}
|
|
if (cnt >= size)
|
|
file_modified++;
|
|
close(fd);
|
|
fi0:
|
|
#if ENABLE_FEATURE_VI_READONLY
|
|
if (update_ro_status
|
|
&& ((access(fn, W_OK) < 0) ||
|
|
/* root will always have access()
|
|
* so we check fileperms too */
|
|
!(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))
|
|
)
|
|
) {
|
|
SET_READONLY_FILE(readonly_mode);
|
|
}
|
|
#endif
|
|
return cnt;
|
|
}
|
|
|
|
static int file_write(char *fn, char *first, char *last)
|
|
{
|
|
int fd, cnt, charcnt;
|
|
|
|
if (fn == 0) {
|
|
status_line_bold("No current filename");
|
|
return -2;
|
|
}
|
|
charcnt = 0;
|
|
/* By popular request we do not open file with O_TRUNC,
|
|
* but instead ftruncate() it _after_ successful write.
|
|
* Might reduce amount of data lost on power fail etc.
|
|
*/
|
|
fd = open(fn, (O_WRONLY | O_CREAT), 0666);
|
|
if (fd < 0)
|
|
return -1;
|
|
cnt = last - first + 1;
|
|
charcnt = full_write(fd, first, cnt);
|
|
ftruncate(fd, charcnt);
|
|
if (charcnt == cnt) {
|
|
// good write
|
|
//file_modified = FALSE;
|
|
} else {
|
|
charcnt = 0;
|
|
}
|
|
close(fd);
|
|
return charcnt;
|
|
}
|
|
|
|
//----- Terminal Drawing ---------------------------------------
|
|
// The terminal is made up of 'rows' line of 'columns' columns.
|
|
// classically this would be 24 x 80.
|
|
// screen coordinates
|
|
// 0,0 ... 0,79
|
|
// 1,0 ... 1,79
|
|
// . ... .
|
|
// . ... .
|
|
// 22,0 ... 22,79
|
|
// 23,0 ... 23,79 <- status line
|
|
|
|
//----- Move the cursor to row x col (count from 0, not 1) -------
|
|
static void place_cursor(int row, int col, int optimize)
|
|
{
|
|
char cm1[sizeof(CMrc) + sizeof(int)*3 * 2];
|
|
char *cm;
|
|
|
|
if (row < 0) row = 0;
|
|
if (row >= rows) row = rows - 1;
|
|
if (col < 0) col = 0;
|
|
if (col >= columns) col = columns - 1;
|
|
|
|
//----- 1. Try the standard terminal ESC sequence
|
|
sprintf(cm1, CMrc, row + 1, col + 1);
|
|
cm = cm1;
|
|
|
|
#if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
|
|
if (optimize && col < 16) {
|
|
enum {
|
|
SZ_UP = sizeof(CMup),
|
|
SZ_DN = sizeof(CMdown),
|
|
SEQ_SIZE = SZ_UP > SZ_DN ? SZ_UP : SZ_DN,
|
|
};
|
|
char cm2[SEQ_SIZE * 5 + 32]; // bigger than worst case size
|
|
char *screenp;
|
|
int Rrow = last_row;
|
|
int diff = Rrow - row;
|
|
|
|
if (diff < -5 || diff > 5)
|
|
goto skip;
|
|
|
|
//----- find the minimum # of chars to move cursor -------------
|
|
//----- 2. Try moving with discreet chars (Newline, [back]space, ...)
|
|
cm2[0] = '\0';
|
|
|
|
// move to the correct row
|
|
while (row < Rrow) {
|
|
// the cursor has to move up
|
|
strcat(cm2, CMup);
|
|
Rrow--;
|
|
}
|
|
while (row > Rrow) {
|
|
// the cursor has to move down
|
|
strcat(cm2, CMdown);
|
|
Rrow++;
|
|
}
|
|
|
|
// now move to the correct column
|
|
strcat(cm2, "\r"); // start at col 0
|
|
// just send out orignal source char to get to correct place
|
|
screenp = &screen[row * columns]; // start of screen line
|
|
strncat(cm2, screenp, col);
|
|
|
|
// pick the shortest cursor motion to send out
|
|
if (strlen(cm2) < strlen(cm)) {
|
|
cm = cm2;
|
|
}
|
|
skip: ;
|
|
}
|
|
last_row = row;
|
|
#endif /* FEATURE_VI_OPTIMIZE_CURSOR */
|
|
write1(cm);
|
|
}
|
|
|
|
//----- Erase from cursor to end of line -----------------------
|
|
static void clear_to_eol(void)
|
|
{
|
|
write1(Ceol); // Erase from cursor to end of line
|
|
}
|
|
|
|
//----- Erase from cursor to end of screen -----------------------
|
|
static void clear_to_eos(void)
|
|
{
|
|
write1(Ceos); // Erase from cursor to end of screen
|
|
}
|
|
|
|
//----- Start standout mode ------------------------------------
|
|
static void standout_start(void) // send "start reverse video" sequence
|
|
{
|
|
write1(SOs); // Start reverse video mode
|
|
}
|
|
|
|
//----- End standout mode --------------------------------------
|
|
static void standout_end(void) // send "end reverse video" sequence
|
|
{
|
|
write1(SOn); // End reverse video mode
|
|
}
|
|
|
|
//----- Flash the screen --------------------------------------
|
|
static void flash(int h)
|
|
{
|
|
standout_start(); // send "start reverse video" sequence
|
|
redraw(TRUE);
|
|
mysleep(h);
|
|
standout_end(); // send "end reverse video" sequence
|
|
redraw(TRUE);
|
|
}
|
|
|
|
static void Indicate_Error(void)
|
|
{
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
if (crashme > 0)
|
|
return; // generate a random command
|
|
#endif
|
|
if (!err_method) {
|
|
write1(bell); // send out a bell character
|
|
} else {
|
|
flash(10);
|
|
}
|
|
}
|
|
|
|
//----- Screen[] Routines --------------------------------------
|
|
//----- Erase the Screen[] memory ------------------------------
|
|
static void screen_erase(void)
|
|
{
|
|
memset(screen, ' ', screensize); // clear new screen
|
|
}
|
|
|
|
static int bufsum(char *buf, int count)
|
|
{
|
|
int sum = 0;
|
|
char *e = buf + count;
|
|
|
|
while (buf < e)
|
|
sum += (unsigned char) *buf++;
|
|
return sum;
|
|
}
|
|
|
|
//----- Draw the status line at bottom of the screen -------------
|
|
static void show_status_line(void)
|
|
{
|
|
int cnt = 0, cksum = 0;
|
|
|
|
// either we already have an error or status message, or we
|
|
// create one.
|
|
if (!have_status_msg) {
|
|
cnt = format_edit_status();
|
|
cksum = bufsum(status_buffer, cnt);
|
|
}
|
|
if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
|
|
last_status_cksum = cksum; // remember if we have seen this line
|
|
place_cursor(rows - 1, 0, FALSE); // put cursor on status line
|
|
write1(status_buffer);
|
|
clear_to_eol();
|
|
if (have_status_msg) {
|
|
if (((int)strlen(status_buffer) - (have_status_msg - 1)) >
|
|
(columns - 1) ) {
|
|
have_status_msg = 0;
|
|
Hit_Return();
|
|
}
|
|
have_status_msg = 0;
|
|
}
|
|
place_cursor(crow, ccol, FALSE); // put cursor back in correct place
|
|
}
|
|
fflush(stdout);
|
|
}
|
|
|
|
//----- format the status buffer, the bottom line of screen ------
|
|
// format status buffer, with STANDOUT mode
|
|
static void status_line_bold(const char *format, ...)
|
|
{
|
|
va_list args;
|
|
|
|
va_start(args, format);
|
|
strcpy(status_buffer, SOs); // Terminal standout mode on
|
|
vsprintf(status_buffer + sizeof(SOs)-1, format, args);
|
|
strcat(status_buffer, SOn); // Terminal standout mode off
|
|
va_end(args);
|
|
|
|
have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2;
|
|
}
|
|
|
|
// format status buffer
|
|
static void status_line(const char *format, ...)
|
|
{
|
|
va_list args;
|
|
|
|
va_start(args, format);
|
|
vsprintf(status_buffer, format, args);
|
|
va_end(args);
|
|
|
|
have_status_msg = 1;
|
|
}
|
|
|
|
// copy s to buf, convert unprintable
|
|
static void print_literal(char *buf, const char *s)
|
|
{
|
|
unsigned char c;
|
|
char b[2];
|
|
|
|
b[1] = '\0';
|
|
buf[0] = '\0';
|
|
if (!s[0])
|
|
s = "(NULL)";
|
|
for (; *s; s++) {
|
|
int c_is_no_print;
|
|
|
|
c = *s;
|
|
c_is_no_print = (c & 0x80) && !Isprint(c);
|
|
if (c_is_no_print) {
|
|
strcat(buf, SOn);
|
|
c = '.';
|
|
}
|
|
if (c < ' ' || c == 127) {
|
|
strcat(buf, "^");
|
|
if (c == 127)
|
|
c = '?';
|
|
else
|
|
c += '@';
|
|
}
|
|
b[0] = c;
|
|
strcat(buf, b);
|
|
if (c_is_no_print)
|
|
strcat(buf, SOs);
|
|
if (*s == '\n')
|
|
strcat(buf, "$");
|
|
if (strlen(buf) > MAX_INPUT_LEN - 10) // paranoia
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void not_implemented(const char *s)
|
|
{
|
|
char buf[MAX_INPUT_LEN];
|
|
|
|
print_literal(buf, s);
|
|
status_line_bold("\'%s\' is not implemented", buf);
|
|
}
|
|
|
|
// show file status on status line
|
|
static int format_edit_status(void)
|
|
{
|
|
static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
|
|
|
|
#define tot format_edit_status__tot
|
|
|
|
int cur, percent, ret, trunc_at;
|
|
|
|
// file_modified is now a counter rather than a flag. this
|
|
// helps reduce the amount of line counting we need to do.
|
|
// (this will cause a mis-reporting of modified status
|
|
// once every MAXINT editing operations.)
|
|
|
|
// it would be nice to do a similar optimization here -- if
|
|
// we haven't done a motion that could have changed which line
|
|
// we're on, then we shouldn't have to do this count_lines()
|
|
cur = count_lines(text, dot);
|
|
|
|
// reduce counting -- the total lines can't have
|
|
// changed if we haven't done any edits.
|
|
if (file_modified != last_file_modified) {
|
|
tot = cur + count_lines(dot, end - 1) - 1;
|
|
last_file_modified = file_modified;
|
|
}
|
|
|
|
// current line percent
|
|
// ------------- ~~ ----------
|
|
// total lines 100
|
|
if (tot > 0) {
|
|
percent = (100 * cur) / tot;
|
|
} else {
|
|
cur = tot = 0;
|
|
percent = 100;
|
|
}
|
|
|
|
trunc_at = columns < STATUS_BUFFER_LEN-1 ?
|
|
columns : STATUS_BUFFER_LEN-1;
|
|
|
|
ret = snprintf(status_buffer, trunc_at+1,
|
|
#if ENABLE_FEATURE_VI_READONLY
|
|
"%c %s%s%s %d/%d %d%%",
|
|
#else
|
|
"%c %s%s %d/%d %d%%",
|
|
#endif
|
|
cmd_mode_indicator[cmd_mode & 3],
|
|
(current_filename != NULL ? current_filename : "No file"),
|
|
#if ENABLE_FEATURE_VI_READONLY
|
|
(readonly_mode ? " [Readonly]" : ""),
|
|
#endif
|
|
(file_modified ? " [Modified]" : ""),
|
|
cur, tot, percent);
|
|
|
|
if (ret >= 0 && ret < trunc_at)
|
|
return ret; /* it all fit */
|
|
|
|
return trunc_at; /* had to truncate */
|
|
#undef tot
|
|
}
|
|
|
|
//----- Force refresh of all Lines -----------------------------
|
|
static void redraw(int full_screen)
|
|
{
|
|
place_cursor(0, 0, FALSE); // put cursor in correct place
|
|
clear_to_eos(); // tell terminal to erase display
|
|
screen_erase(); // erase the internal screen buffer
|
|
last_status_cksum = 0; // force status update
|
|
refresh(full_screen); // this will redraw the entire display
|
|
show_status_line();
|
|
}
|
|
|
|
//----- Format a text[] line into a buffer ---------------------
|
|
static char* format_line(char *src /*, int li*/)
|
|
{
|
|
unsigned char c;
|
|
int co;
|
|
int ofs = offset;
|
|
char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2]
|
|
|
|
c = '~'; // char in col 0 in non-existent lines is '~'
|
|
co = 0;
|
|
while (co < columns + tabstop) {
|
|
// have we gone past the end?
|
|
if (src < end) {
|
|
c = *src++;
|
|
if (c == '\n')
|
|
break;
|
|
if ((c & 0x80) && !Isprint(c)) {
|
|
c = '.';
|
|
}
|
|
if (c < ' ' || c == 0x7f) {
|
|
if (c == '\t') {
|
|
c = ' ';
|
|
// co % 8 != 7
|
|
while ((co % tabstop) != (tabstop - 1)) {
|
|
dest[co++] = c;
|
|
}
|
|
} else {
|
|
dest[co++] = '^';
|
|
if (c == 0x7f)
|
|
c = '?';
|
|
else
|
|
c += '@'; // Ctrl-X -> 'X'
|
|
}
|
|
}
|
|
}
|
|
dest[co++] = c;
|
|
// discard scrolled-off-to-the-left portion,
|
|
// in tabstop-sized pieces
|
|
if (ofs >= tabstop && co >= tabstop) {
|
|
memmove(dest, dest + tabstop, co);
|
|
co -= tabstop;
|
|
ofs -= tabstop;
|
|
}
|
|
if (src >= end)
|
|
break;
|
|
}
|
|
// check "short line, gigantic offset" case
|
|
if (co < ofs)
|
|
ofs = co;
|
|
// discard last scrolled off part
|
|
co -= ofs;
|
|
dest += ofs;
|
|
// fill the rest with spaces
|
|
if (co < columns)
|
|
memset(&dest[co], ' ', columns - co);
|
|
return dest;
|
|
}
|
|
|
|
//----- Refresh the changed screen lines -----------------------
|
|
// Copy the source line from text[] into the buffer and note
|
|
// if the current screenline is different from the new buffer.
|
|
// If they differ then that line needs redrawing on the terminal.
|
|
//
|
|
static void refresh(int full_screen)
|
|
{
|
|
#define old_offset refresh__old_offset
|
|
|
|
int li, changed;
|
|
char *tp, *sp; // pointer into text[] and screen[]
|
|
|
|
if (ENABLE_FEATURE_VI_WIN_RESIZE) {
|
|
unsigned c = columns, r = rows;
|
|
get_terminal_width_height(0, &columns, &rows);
|
|
if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
|
|
if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
|
|
full_screen |= (c - columns) | (r - rows);
|
|
}
|
|
sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
|
|
tp = screenbegin; // index into text[] of top line
|
|
|
|
// compare text[] to screen[] and mark screen[] lines that need updating
|
|
for (li = 0; li < rows - 1; li++) {
|
|
int cs, ce; // column start & end
|
|
char *out_buf;
|
|
// format current text line
|
|
out_buf = format_line(tp /*, li*/);
|
|
|
|
// skip to the end of the current text[] line
|
|
if (tp < end) {
|
|
char *t = memchr(tp, '\n', end - tp);
|
|
if (!t) t = end - 1;
|
|
tp = t + 1;
|
|
}
|
|
|
|
// see if there are any changes between vitual screen and out_buf
|
|
changed = FALSE; // assume no change
|
|
cs = 0;
|
|
ce = columns - 1;
|
|
sp = &screen[li * columns]; // start of screen line
|
|
if (full_screen) {
|
|
// force re-draw of every single column from 0 - columns-1
|
|
goto re0;
|
|
}
|
|
// compare newly formatted buffer with virtual screen
|
|
// look forward for first difference between buf and screen
|
|
for (; cs <= ce; cs++) {
|
|
if (out_buf[cs] != sp[cs]) {
|
|
changed = TRUE; // mark for redraw
|
|
break;
|
|
}
|
|
}
|
|
|
|
// look backward for last difference between out_buf and screen
|
|
for (; ce >= cs; ce--) {
|
|
if (out_buf[ce] != sp[ce]) {
|
|
changed = TRUE; // mark for redraw
|
|
break;
|
|
}
|
|
}
|
|
// now, cs is index of first diff, and ce is index of last diff
|
|
|
|
// if horz offset has changed, force a redraw
|
|
if (offset != old_offset) {
|
|
re0:
|
|
changed = TRUE;
|
|
}
|
|
|
|
// make a sanity check of columns indexes
|
|
if (cs < 0) cs = 0;
|
|
if (ce > columns - 1) ce = columns - 1;
|
|
if (cs > ce) { cs = 0; ce = columns - 1; }
|
|
// is there a change between vitual screen and out_buf
|
|
if (changed) {
|
|
// copy changed part of buffer to virtual screen
|
|
memcpy(sp+cs, out_buf+cs, ce-cs+1);
|
|
|
|
// move cursor to column of first change
|
|
//if (offset != old_offset) {
|
|
// // place_cursor is still too stupid
|
|
// // to handle offsets correctly
|
|
// place_cursor(li, cs, FALSE);
|
|
//} else {
|
|
place_cursor(li, cs, TRUE);
|
|
//}
|
|
|
|
// write line out to terminal
|
|
fwrite(&sp[cs], ce - cs + 1, 1, stdout);
|
|
}
|
|
}
|
|
|
|
place_cursor(crow, ccol, TRUE);
|
|
|
|
old_offset = offset;
|
|
#undef old_offset
|
|
}
|
|
|
|
//---------------------------------------------------------------------
|
|
//----- the Ascii Chart -----------------------------------------------
|
|
//
|
|
// 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
|
|
// 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
|
|
// 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
|
|
// 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
|
|
// 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
|
|
// 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
|
|
// 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
|
|
// 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
|
|
// 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
|
|
// 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
|
|
// 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
|
|
// 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
|
|
// 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
|
|
// 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
|
|
// 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
|
|
// 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
|
|
//---------------------------------------------------------------------
|
|
|
|
//----- Execute a Vi Command -----------------------------------
|
|
static void do_cmd(char c)
|
|
{
|
|
const char *msg = msg; // for compiler
|
|
char c1, *p, *q, *save_dot;
|
|
char buf[12];
|
|
int dir = dir; // for compiler
|
|
int cnt, i, j;
|
|
|
|
// c1 = c; // quiet the compiler
|
|
// cnt = yf = 0; // quiet the compiler
|
|
// msg = p = q = save_dot = buf; // quiet the compiler
|
|
memset(buf, '\0', 12);
|
|
|
|
show_status_line();
|
|
|
|
/* if this is a cursor key, skip these checks */
|
|
switch (c) {
|
|
case VI_K_UP:
|
|
case VI_K_DOWN:
|
|
case VI_K_LEFT:
|
|
case VI_K_RIGHT:
|
|
case VI_K_HOME:
|
|
case VI_K_END:
|
|
case VI_K_PAGEUP:
|
|
case VI_K_PAGEDOWN:
|
|
goto key_cmd_mode;
|
|
}
|
|
|
|
if (cmd_mode == 2) {
|
|
// flip-flop Insert/Replace mode
|
|
if (c == VI_K_INSERT)
|
|
goto dc_i;
|
|
// we are 'R'eplacing the current *dot with new char
|
|
if (*dot == '\n') {
|
|
// don't Replace past E-o-l
|
|
cmd_mode = 1; // convert to insert
|
|
} else {
|
|
if (1 <= c || Isprint(c)) {
|
|
if (c != 27)
|
|
dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
|
|
dot = char_insert(dot, c); // insert new char
|
|
}
|
|
goto dc1;
|
|
}
|
|
}
|
|
if (cmd_mode == 1) {
|
|
// hitting "Insert" twice means "R" replace mode
|
|
if (c == VI_K_INSERT) goto dc5;
|
|
// insert the char c at "dot"
|
|
if (1 <= c || Isprint(c)) {
|
|
dot = char_insert(dot, c);
|
|
}
|
|
goto dc1;
|
|
}
|
|
|
|
key_cmd_mode:
|
|
switch (c) {
|
|
//case 0x01: // soh
|
|
//case 0x09: // ht
|
|
//case 0x0b: // vt
|
|
//case 0x0e: // so
|
|
//case 0x0f: // si
|
|
//case 0x10: // dle
|
|
//case 0x11: // dc1
|
|
//case 0x13: // dc3
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
case 0x14: // dc4 ctrl-T
|
|
crashme = (crashme == 0) ? 1 : 0;
|
|
break;
|
|
#endif
|
|
//case 0x16: // syn
|
|
//case 0x17: // etb
|
|
//case 0x18: // can
|
|
//case 0x1c: // fs
|
|
//case 0x1d: // gs
|
|
//case 0x1e: // rs
|
|
//case 0x1f: // us
|
|
//case '!': // !-
|
|
//case '#': // #-
|
|
//case '&': // &-
|
|
//case '(': // (-
|
|
//case ')': // )-
|
|
//case '*': // *-
|
|
//case '=': // =-
|
|
//case '@': // @-
|
|
//case 'F': // F-
|
|
//case 'K': // K-
|
|
//case 'Q': // Q-
|
|
//case 'S': // S-
|
|
//case 'T': // T-
|
|
//case 'V': // V-
|
|
//case '[': // [-
|
|
//case '\\': // \-
|
|
//case ']': // ]-
|
|
//case '_': // _-
|
|
//case '`': // `-
|
|
//case 'u': // u- FIXME- there is no undo
|
|
//case 'v': // v-
|
|
default: // unrecognised command
|
|
buf[0] = c;
|
|
buf[1] = '\0';
|
|
if (c < ' ') {
|
|
buf[0] = '^';
|
|
buf[1] = c + '@';
|
|
buf[2] = '\0';
|
|
}
|
|
not_implemented(buf);
|
|
end_cmd_q(); // stop adding to q
|
|
case 0x00: // nul- ignore
|
|
break;
|
|
case 2: // ctrl-B scroll up full screen
|
|
case VI_K_PAGEUP: // Cursor Key Page Up
|
|
dot_scroll(rows - 2, -1);
|
|
break;
|
|
case 4: // ctrl-D scroll down half screen
|
|
dot_scroll((rows - 2) / 2, 1);
|
|
break;
|
|
case 5: // ctrl-E scroll down one line
|
|
dot_scroll(1, 1);
|
|
break;
|
|
case 6: // ctrl-F scroll down full screen
|
|
case VI_K_PAGEDOWN: // Cursor Key Page Down
|
|
dot_scroll(rows - 2, 1);
|
|
break;
|
|
case 7: // ctrl-G show current status
|
|
last_status_cksum = 0; // force status update
|
|
break;
|
|
case 'h': // h- move left
|
|
case VI_K_LEFT: // cursor key Left
|
|
case 8: // ctrl-H- move left (This may be ERASE char)
|
|
case 0x7f: // DEL- move left (This may be ERASE char)
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
dot_left();
|
|
break;
|
|
case 10: // Newline ^J
|
|
case 'j': // j- goto next line, same col
|
|
case VI_K_DOWN: // cursor key Down
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
dot_next(); // go to next B-o-l
|
|
dot = move_to_col(dot, ccol + offset); // try stay in same col
|
|
break;
|
|
case 12: // ctrl-L force redraw whole screen
|
|
case 18: // ctrl-R force redraw
|
|
place_cursor(0, 0, FALSE); // put cursor in correct place
|
|
clear_to_eos(); // tel terminal to erase display
|
|
mysleep(10);
|
|
screen_erase(); // erase the internal screen buffer
|
|
last_status_cksum = 0; // force status update
|
|
refresh(TRUE); // this will redraw the entire display
|
|
break;
|
|
case 13: // Carriage Return ^M
|
|
case '+': // +- goto next line
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
dot_next();
|
|
dot_skip_over_ws();
|
|
break;
|
|
case 21: // ctrl-U scroll up half screen
|
|
dot_scroll((rows - 2) / 2, -1);
|
|
break;
|
|
case 25: // ctrl-Y scroll up one line
|
|
dot_scroll(1, -1);
|
|
break;
|
|
case 27: // esc
|
|
if (cmd_mode == 0)
|
|
indicate_error(c);
|
|
cmd_mode = 0; // stop insrting
|
|
end_cmd_q();
|
|
last_status_cksum = 0; // force status update
|
|
break;
|
|
case ' ': // move right
|
|
case 'l': // move right
|
|
case VI_K_RIGHT: // Cursor Key Right
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
dot_right();
|
|
break;
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
case '"': // "- name a register to use for Delete/Yank
|
|
c1 = get_one_char();
|
|
c1 = tolower(c1);
|
|
if (islower(c1)) {
|
|
YDreg = c1 - 'a';
|
|
} else {
|
|
indicate_error(c);
|
|
}
|
|
break;
|
|
case '\'': // '- goto a specific mark
|
|
c1 = get_one_char();
|
|
c1 = tolower(c1);
|
|
if (islower(c1)) {
|
|
c1 = c1 - 'a';
|
|
// get the b-o-l
|
|
q = mark[(unsigned char) c1];
|
|
if (text <= q && q < end) {
|
|
dot = q;
|
|
dot_begin(); // go to B-o-l
|
|
dot_skip_over_ws();
|
|
}
|
|
} else if (c1 == '\'') { // goto previous context
|
|
dot = swap_context(dot); // swap current and previous context
|
|
dot_begin(); // go to B-o-l
|
|
dot_skip_over_ws();
|
|
} else {
|
|
indicate_error(c);
|
|
}
|
|
break;
|
|
case 'm': // m- Mark a line
|
|
// this is really stupid. If there are any inserts or deletes
|
|
// between text[0] and dot then this mark will not point to the
|
|
// correct location! It could be off by many lines!
|
|
// Well..., at least its quick and dirty.
|
|
c1 = get_one_char();
|
|
c1 = tolower(c1);
|
|
if (islower(c1)) {
|
|
c1 = c1 - 'a';
|
|
// remember the line
|
|
mark[(int) c1] = dot;
|
|
} else {
|
|
indicate_error(c);
|
|
}
|
|
break;
|
|
case 'P': // P- Put register before
|
|
case 'p': // p- put register after
|
|
p = reg[YDreg];
|
|
if (p == 0) {
|
|
status_line_bold("Nothing in register %c", what_reg());
|
|
break;
|
|
}
|
|
// are we putting whole lines or strings
|
|
if (strchr(p, '\n') != NULL) {
|
|
if (c == 'P') {
|
|
dot_begin(); // putting lines- Put above
|
|
}
|
|
if (c == 'p') {
|
|
// are we putting after very last line?
|
|
if (end_line(dot) == (end - 1)) {
|
|
dot = end; // force dot to end of text[]
|
|
} else {
|
|
dot_next(); // next line, then put before
|
|
}
|
|
}
|
|
} else {
|
|
if (c == 'p')
|
|
dot_right(); // move to right, can move to NL
|
|
}
|
|
dot = string_insert(dot, p); // insert the string
|
|
end_cmd_q(); // stop adding to q
|
|
break;
|
|
case 'U': // U- Undo; replace current line with original version
|
|
if (reg[Ureg] != 0) {
|
|
p = begin_line(dot);
|
|
q = end_line(dot);
|
|
p = text_hole_delete(p, q); // delete cur line
|
|
p = string_insert(p, reg[Ureg]); // insert orig line
|
|
dot = p;
|
|
dot_skip_over_ws();
|
|
}
|
|
break;
|
|
#endif /* FEATURE_VI_YANKMARK */
|
|
case '$': // $- goto end of line
|
|
case VI_K_END: // Cursor Key End
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
dot = end_line(dot);
|
|
break;
|
|
case '%': // %- find matching char of pair () [] {}
|
|
for (q = dot; q < end && *q != '\n'; q++) {
|
|
if (strchr("()[]{}", *q) != NULL) {
|
|
// we found half of a pair
|
|
p = find_pair(q, *q);
|
|
if (p == NULL) {
|
|
indicate_error(c);
|
|
} else {
|
|
dot = p;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (*q == '\n')
|
|
indicate_error(c);
|
|
break;
|
|
case 'f': // f- forward to a user specified char
|
|
last_forward_char = get_one_char(); // get the search char
|
|
//
|
|
// dont separate these two commands. 'f' depends on ';'
|
|
//
|
|
//**** fall through to ... ';'
|
|
case ';': // ;- look at rest of line for last forward char
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(';');
|
|
} // repeat cnt
|
|
if (last_forward_char == 0)
|
|
break;
|
|
q = dot + 1;
|
|
while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
|
|
q++;
|
|
}
|
|
if (*q == last_forward_char)
|
|
dot = q;
|
|
break;
|
|
case ',': // repeat latest 'f' in opposite direction
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(',');
|
|
} // repeat cnt
|
|
if (last_forward_char == 0)
|
|
break;
|
|
q = dot - 1;
|
|
while (q >= text && *q != '\n' && *q != last_forward_char) {
|
|
q--;
|
|
}
|
|
if (q >= text && *q == last_forward_char)
|
|
dot = q;
|
|
break;
|
|
|
|
case '-': // -- goto prev line
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
dot_prev();
|
|
dot_skip_over_ws();
|
|
break;
|
|
#if ENABLE_FEATURE_VI_DOT_CMD
|
|
case '.': // .- repeat the last modifying command
|
|
// Stuff the last_modifying_cmd back into stdin
|
|
// and let it be re-executed.
|
|
if (lmc_len > 0) {
|
|
last_modifying_cmd[lmc_len] = 0;
|
|
ioq = ioq_start = xstrdup(last_modifying_cmd);
|
|
}
|
|
break;
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_SEARCH
|
|
case '?': // /- search for a pattern
|
|
case '/': // /- search for a pattern
|
|
buf[0] = c;
|
|
buf[1] = '\0';
|
|
q = get_input_line(buf); // get input line- use "status line"
|
|
if (q[0] && !q[1]) {
|
|
if (last_search_pattern[0])
|
|
last_search_pattern[0] = c;
|
|
goto dc3; // if no pat re-use old pat
|
|
}
|
|
if (q[0]) { // strlen(q) > 1: new pat- save it and find
|
|
// there is a new pat
|
|
free(last_search_pattern);
|
|
last_search_pattern = xstrdup(q);
|
|
goto dc3; // now find the pattern
|
|
}
|
|
// user changed mind and erased the "/"- do nothing
|
|
break;
|
|
case 'N': // N- backward search for last pattern
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
dir = BACK; // assume BACKWARD search
|
|
p = dot - 1;
|
|
if (last_search_pattern[0] == '?') {
|
|
dir = FORWARD;
|
|
p = dot + 1;
|
|
}
|
|
goto dc4; // now search for pattern
|
|
break;
|
|
case 'n': // n- repeat search for last pattern
|
|
// search rest of text[] starting at next char
|
|
// if search fails return orignal "p" not the "p+1" address
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
dc3:
|
|
if (last_search_pattern == 0) {
|
|
msg = "No previous regular expression";
|
|
goto dc2;
|
|
}
|
|
if (last_search_pattern[0] == '/') {
|
|
dir = FORWARD; // assume FORWARD search
|
|
p = dot + 1;
|
|
}
|
|
if (last_search_pattern[0] == '?') {
|
|
dir = BACK;
|
|
p = dot - 1;
|
|
}
|
|
dc4:
|
|
q = char_search(p, last_search_pattern + 1, dir, FULL);
|
|
if (q != NULL) {
|
|
dot = q; // good search, update "dot"
|
|
msg = "";
|
|
goto dc2;
|
|
}
|
|
// no pattern found between "dot" and "end"- continue at top
|
|
p = text;
|
|
if (dir == BACK) {
|
|
p = end - 1;
|
|
}
|
|
q = char_search(p, last_search_pattern + 1, dir, FULL);
|
|
if (q != NULL) { // found something
|
|
dot = q; // found new pattern- goto it
|
|
msg = "search hit BOTTOM, continuing at TOP";
|
|
if (dir == BACK) {
|
|
msg = "search hit TOP, continuing at BOTTOM";
|
|
}
|
|
} else {
|
|
msg = "Pattern not found";
|
|
}
|
|
dc2:
|
|
if (*msg)
|
|
status_line_bold("%s", msg);
|
|
break;
|
|
case '{': // {- move backward paragraph
|
|
q = char_search(dot, "\n\n", BACK, FULL);
|
|
if (q != NULL) { // found blank line
|
|
dot = next_line(q); // move to next blank line
|
|
}
|
|
break;
|
|
case '}': // }- move forward paragraph
|
|
q = char_search(dot, "\n\n", FORWARD, FULL);
|
|
if (q != NULL) { // found blank line
|
|
dot = next_line(q); // move to next blank line
|
|
}
|
|
break;
|
|
#endif /* FEATURE_VI_SEARCH */
|
|
case '0': // 0- goto begining of line
|
|
case '1': // 1-
|
|
case '2': // 2-
|
|
case '3': // 3-
|
|
case '4': // 4-
|
|
case '5': // 5-
|
|
case '6': // 6-
|
|
case '7': // 7-
|
|
case '8': // 8-
|
|
case '9': // 9-
|
|
if (c == '0' && cmdcnt < 1) {
|
|
dot_begin(); // this was a standalone zero
|
|
} else {
|
|
cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
|
|
}
|
|
break;
|
|
case ':': // :- the colon mode commands
|
|
p = get_input_line(":"); // get input line- use "status line"
|
|
#if ENABLE_FEATURE_VI_COLON
|
|
colon(p); // execute the command
|
|
#else
|
|
if (*p == ':')
|
|
p++; // move past the ':'
|
|
cnt = strlen(p);
|
|
if (cnt <= 0)
|
|
break;
|
|
if (strncasecmp(p, "quit", cnt) == 0
|
|
|| strncasecmp(p, "q!", cnt) == 0 // delete lines
|
|
) {
|
|
if (file_modified && p[1] != '!') {
|
|
status_line_bold("No write since last change (:quit! overrides)");
|
|
} else {
|
|
editing = 0;
|
|
}
|
|
} else if (strncasecmp(p, "write", cnt) == 0
|
|
|| strncasecmp(p, "wq", cnt) == 0
|
|
|| strncasecmp(p, "wn", cnt) == 0
|
|
|| strncasecmp(p, "x", cnt) == 0
|
|
) {
|
|
cnt = file_write(current_filename, text, end - 1);
|
|
if (cnt < 0) {
|
|
if (cnt == -1)
|
|
status_line_bold("Write error: %s", strerror(errno));
|
|
} else {
|
|
file_modified = 0;
|
|
last_file_modified = -1;
|
|
status_line("\"%s\" %dL, %dC", current_filename, count_lines(text, end - 1), cnt);
|
|
if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
|
|
|| p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
|
|
) {
|
|
editing = 0;
|
|
}
|
|
}
|
|
} else if (strncasecmp(p, "file", cnt) == 0) {
|
|
last_status_cksum = 0; // force status update
|
|
} else if (sscanf(p, "%d", &j) > 0) {
|
|
dot = find_line(j); // go to line # j
|
|
dot_skip_over_ws();
|
|
} else { // unrecognised cmd
|
|
not_implemented(p);
|
|
}
|
|
#endif /* !FEATURE_VI_COLON */
|
|
break;
|
|
case '<': // <- Left shift something
|
|
case '>': // >- Right shift something
|
|
cnt = count_lines(text, dot); // remember what line we are on
|
|
c1 = get_one_char(); // get the type of thing to delete
|
|
find_range(&p, &q, c1);
|
|
yank_delete(p, q, 1, YANKONLY); // save copy before change
|
|
p = begin_line(p);
|
|
q = end_line(q);
|
|
i = count_lines(p, q); // # of lines we are shifting
|
|
for ( ; i > 0; i--, p = next_line(p)) {
|
|
if (c == '<') {
|
|
// shift left- remove tab or 8 spaces
|
|
if (*p == '\t') {
|
|
// shrink buffer 1 char
|
|
text_hole_delete(p, p);
|
|
} else if (*p == ' ') {
|
|
// we should be calculating columns, not just SPACE
|
|
for (j = 0; *p == ' ' && j < tabstop; j++) {
|
|
text_hole_delete(p, p);
|
|
}
|
|
}
|
|
} else if (c == '>') {
|
|
// shift right -- add tab or 8 spaces
|
|
char_insert(p, '\t');
|
|
}
|
|
}
|
|
dot = find_line(cnt); // what line were we on
|
|
dot_skip_over_ws();
|
|
end_cmd_q(); // stop adding to q
|
|
break;
|
|
case 'A': // A- append at e-o-l
|
|
dot_end(); // go to e-o-l
|
|
//**** fall through to ... 'a'
|
|
case 'a': // a- append after current char
|
|
if (*dot != '\n')
|
|
dot++;
|
|
goto dc_i;
|
|
break;
|
|
case 'B': // B- back a blank-delimited Word
|
|
case 'E': // E- end of a blank-delimited word
|
|
case 'W': // W- forward a blank-delimited word
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
dir = FORWARD;
|
|
if (c == 'B')
|
|
dir = BACK;
|
|
if (c == 'W' || isspace(dot[dir])) {
|
|
dot = skip_thing(dot, 1, dir, S_TO_WS);
|
|
dot = skip_thing(dot, 2, dir, S_OVER_WS);
|
|
}
|
|
if (c != 'W')
|
|
dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
|
|
break;
|
|
case 'C': // C- Change to e-o-l
|
|
case 'D': // D- delete to e-o-l
|
|
save_dot = dot;
|
|
dot = dollar_line(dot); // move to before NL
|
|
// copy text into a register and delete
|
|
dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
|
|
if (c == 'C')
|
|
goto dc_i; // start inserting
|
|
#if ENABLE_FEATURE_VI_DOT_CMD
|
|
if (c == 'D')
|
|
end_cmd_q(); // stop adding to q
|
|
#endif
|
|
break;
|
|
case 'g': // 'gg' goto a line number (from vim)
|
|
// (default to first line in file)
|
|
c1 = get_one_char();
|
|
if (c1 != 'g') {
|
|
buf[0] = 'g';
|
|
buf[1] = c1;
|
|
buf[2] = '\0';
|
|
not_implemented(buf);
|
|
break;
|
|
}
|
|
if (cmdcnt == 0)
|
|
cmdcnt = 1;
|
|
/* fall through */
|
|
case 'G': // G- goto to a line number (default= E-O-F)
|
|
dot = end - 1; // assume E-O-F
|
|
if (cmdcnt > 0) {
|
|
dot = find_line(cmdcnt); // what line is #cmdcnt
|
|
}
|
|
dot_skip_over_ws();
|
|
break;
|
|
case 'H': // H- goto top line on screen
|
|
dot = screenbegin;
|
|
if (cmdcnt > (rows - 1)) {
|
|
cmdcnt = (rows - 1);
|
|
}
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd('+');
|
|
} // repeat cnt
|
|
dot_skip_over_ws();
|
|
break;
|
|
case 'I': // I- insert before first non-blank
|
|
dot_begin(); // 0
|
|
dot_skip_over_ws();
|
|
//**** fall through to ... 'i'
|
|
case 'i': // i- insert before current char
|
|
case VI_K_INSERT: // Cursor Key Insert
|
|
dc_i:
|
|
cmd_mode = 1; // start insrting
|
|
break;
|
|
case 'J': // J- join current and next lines together
|
|
if (cmdcnt-- > 2) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
dot_end(); // move to NL
|
|
if (dot < end - 1) { // make sure not last char in text[]
|
|
*dot++ = ' '; // replace NL with space
|
|
file_modified++;
|
|
while (isblank(*dot)) { // delete leading WS
|
|
dot_delete();
|
|
}
|
|
}
|
|
end_cmd_q(); // stop adding to q
|
|
break;
|
|
case 'L': // L- goto bottom line on screen
|
|
dot = end_screen();
|
|
if (cmdcnt > (rows - 1)) {
|
|
cmdcnt = (rows - 1);
|
|
}
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd('-');
|
|
} // repeat cnt
|
|
dot_begin();
|
|
dot_skip_over_ws();
|
|
break;
|
|
case 'M': // M- goto middle line on screen
|
|
dot = screenbegin;
|
|
for (cnt = 0; cnt < (rows-1) / 2; cnt++)
|
|
dot = next_line(dot);
|
|
break;
|
|
case 'O': // O- open a empty line above
|
|
// 0i\n ESC -i
|
|
p = begin_line(dot);
|
|
if (p[-1] == '\n') {
|
|
dot_prev();
|
|
case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
|
|
dot_end();
|
|
dot = char_insert(dot, '\n');
|
|
} else {
|
|
dot_begin(); // 0
|
|
dot = char_insert(dot, '\n'); // i\n ESC
|
|
dot_prev(); // -
|
|
}
|
|
goto dc_i;
|
|
break;
|
|
case 'R': // R- continuous Replace char
|
|
dc5:
|
|
cmd_mode = 2;
|
|
break;
|
|
case VI_K_DELETE:
|
|
c = 'x';
|
|
// fall through
|
|
case 'X': // X- delete char before dot
|
|
case 'x': // x- delete the current char
|
|
case 's': // s- substitute the current char
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
dir = 0;
|
|
if (c == 'X')
|
|
dir = -1;
|
|
if (dot[dir] != '\n') {
|
|
if (c == 'X')
|
|
dot--; // delete prev char
|
|
dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
|
|
}
|
|
if (c == 's')
|
|
goto dc_i; // start insrting
|
|
end_cmd_q(); // stop adding to q
|
|
break;
|
|
case 'Z': // Z- if modified, {write}; exit
|
|
// ZZ means to save file (if necessary), then exit
|
|
c1 = get_one_char();
|
|
if (c1 != 'Z') {
|
|
indicate_error(c);
|
|
break;
|
|
}
|
|
if (file_modified) {
|
|
if (ENABLE_FEATURE_VI_READONLY && readonly_mode) {
|
|
status_line_bold("\"%s\" File is read only", current_filename);
|
|
break;
|
|
}
|
|
cnt = file_write(current_filename, text, end - 1);
|
|
if (cnt < 0) {
|
|
if (cnt == -1)
|
|
status_line_bold("Write error: %s", strerror(errno));
|
|
} else if (cnt == (end - 1 - text + 1)) {
|
|
editing = 0;
|
|
}
|
|
} else {
|
|
editing = 0;
|
|
}
|
|
break;
|
|
case '^': // ^- move to first non-blank on line
|
|
dot_begin();
|
|
dot_skip_over_ws();
|
|
break;
|
|
case 'b': // b- back a word
|
|
case 'e': // e- end of word
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
dir = FORWARD;
|
|
if (c == 'b')
|
|
dir = BACK;
|
|
if ((dot + dir) < text || (dot + dir) > end - 1)
|
|
break;
|
|
dot += dir;
|
|
if (isspace(*dot)) {
|
|
dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
|
|
}
|
|
if (isalnum(*dot) || *dot == '_') {
|
|
dot = skip_thing(dot, 1, dir, S_END_ALNUM);
|
|
} else if (ispunct(*dot)) {
|
|
dot = skip_thing(dot, 1, dir, S_END_PUNCT);
|
|
}
|
|
break;
|
|
case 'c': // c- change something
|
|
case 'd': // d- delete something
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
case 'y': // y- yank something
|
|
case 'Y': // Y- Yank a line
|
|
#endif
|
|
{
|
|
int yf, ml, whole = 0;
|
|
yf = YANKDEL; // assume either "c" or "d"
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
if (c == 'y' || c == 'Y')
|
|
yf = YANKONLY;
|
|
#endif
|
|
c1 = 'y';
|
|
if (c != 'Y')
|
|
c1 = get_one_char(); // get the type of thing to delete
|
|
// determine range, and whether it spans lines
|
|
ml = find_range(&p, &q, c1);
|
|
if (c1 == 27) { // ESC- user changed mind and wants out
|
|
c = c1 = 27; // Escape- do nothing
|
|
} else if (strchr("wW", c1)) {
|
|
if (c == 'c') {
|
|
// don't include trailing WS as part of word
|
|
while (isblank(*q)) {
|
|
if (q <= text || q[-1] == '\n')
|
|
break;
|
|
q--;
|
|
}
|
|
}
|
|
dot = yank_delete(p, q, ml, yf); // delete word
|
|
} else if (strchr("^0bBeEft%$ lh\b\177", c1)) {
|
|
// partial line copy text into a register and delete
|
|
dot = yank_delete(p, q, ml, yf); // delete word
|
|
} else if (strchr("cdykjHL+-{}\r\n", c1)) {
|
|
// whole line copy text into a register and delete
|
|
dot = yank_delete(p, q, ml, yf); // delete lines
|
|
whole = 1;
|
|
} else {
|
|
// could not recognize object
|
|
c = c1 = 27; // error-
|
|
ml = 0;
|
|
indicate_error(c);
|
|
}
|
|
if (ml && whole) {
|
|
if (c == 'c') {
|
|
dot = char_insert(dot, '\n');
|
|
// on the last line of file don't move to prev line
|
|
if (whole && dot != (end-1)) {
|
|
dot_prev();
|
|
}
|
|
} else if (c == 'd') {
|
|
dot_begin();
|
|
dot_skip_over_ws();
|
|
}
|
|
}
|
|
if (c1 != 27) {
|
|
// if CHANGING, not deleting, start inserting after the delete
|
|
if (c == 'c') {
|
|
strcpy(buf, "Change");
|
|
goto dc_i; // start inserting
|
|
}
|
|
if (c == 'd') {
|
|
strcpy(buf, "Delete");
|
|
}
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
if (c == 'y' || c == 'Y') {
|
|
strcpy(buf, "Yank");
|
|
}
|
|
p = reg[YDreg];
|
|
q = p + strlen(p);
|
|
for (cnt = 0; p <= q; p++) {
|
|
if (*p == '\n')
|
|
cnt++;
|
|
}
|
|
status_line("%s %d lines (%d chars) using [%c]",
|
|
buf, cnt, strlen(reg[YDreg]), what_reg());
|
|
#endif
|
|
end_cmd_q(); // stop adding to q
|
|
}
|
|
}
|
|
break;
|
|
case 'k': // k- goto prev line, same col
|
|
case VI_K_UP: // cursor key Up
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
dot_prev();
|
|
dot = move_to_col(dot, ccol + offset); // try stay in same col
|
|
break;
|
|
case 'r': // r- replace the current char with user input
|
|
c1 = get_one_char(); // get the replacement char
|
|
if (*dot != '\n') {
|
|
*dot = c1;
|
|
file_modified++;
|
|
}
|
|
end_cmd_q(); // stop adding to q
|
|
break;
|
|
case 't': // t- move to char prior to next x
|
|
last_forward_char = get_one_char();
|
|
do_cmd(';');
|
|
if (*dot == last_forward_char)
|
|
dot_left();
|
|
last_forward_char= 0;
|
|
break;
|
|
case 'w': // w- forward a word
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
|
|
dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
|
|
} else if (ispunct(*dot)) { // we are on PUNCT
|
|
dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
|
|
}
|
|
if (dot < end - 1)
|
|
dot++; // move over word
|
|
if (isspace(*dot)) {
|
|
dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
|
|
}
|
|
break;
|
|
case 'z': // z-
|
|
c1 = get_one_char(); // get the replacement char
|
|
cnt = 0;
|
|
if (c1 == '.')
|
|
cnt = (rows - 2) / 2; // put dot at center
|
|
if (c1 == '-')
|
|
cnt = rows - 2; // put dot at bottom
|
|
screenbegin = begin_line(dot); // start dot at top
|
|
dot_scroll(cnt, -1);
|
|
break;
|
|
case '|': // |- move to column "cmdcnt"
|
|
dot = move_to_col(dot, cmdcnt - 1); // try to move to column
|
|
break;
|
|
case '~': // ~- flip the case of letters a-z -> A-Z
|
|
if (cmdcnt-- > 1) {
|
|
do_cmd(c);
|
|
} // repeat cnt
|
|
if (islower(*dot)) {
|
|
*dot = toupper(*dot);
|
|
file_modified++;
|
|
} else if (isupper(*dot)) {
|
|
*dot = tolower(*dot);
|
|
file_modified++;
|
|
}
|
|
dot_right();
|
|
end_cmd_q(); // stop adding to q
|
|
break;
|
|
//----- The Cursor and Function Keys -----------------------------
|
|
case VI_K_HOME: // Cursor Key Home
|
|
dot_begin();
|
|
break;
|
|
// The Fn keys could point to do_macro which could translate them
|
|
case VI_K_FUN1: // Function Key F1
|
|
case VI_K_FUN2: // Function Key F2
|
|
case VI_K_FUN3: // Function Key F3
|
|
case VI_K_FUN4: // Function Key F4
|
|
case VI_K_FUN5: // Function Key F5
|
|
case VI_K_FUN6: // Function Key F6
|
|
case VI_K_FUN7: // Function Key F7
|
|
case VI_K_FUN8: // Function Key F8
|
|
case VI_K_FUN9: // Function Key F9
|
|
case VI_K_FUN10: // Function Key F10
|
|
case VI_K_FUN11: // Function Key F11
|
|
case VI_K_FUN12: // Function Key F12
|
|
break;
|
|
}
|
|
|
|
dc1:
|
|
// if text[] just became empty, add back an empty line
|
|
if (end == text) {
|
|
char_insert(text, '\n'); // start empty buf with dummy line
|
|
dot = text;
|
|
}
|
|
// it is OK for dot to exactly equal to end, otherwise check dot validity
|
|
if (dot != end) {
|
|
dot = bound_dot(dot); // make sure "dot" is valid
|
|
}
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
check_context(c); // update the current context
|
|
#endif
|
|
|
|
if (!isdigit(c))
|
|
cmdcnt = 0; // cmd was not a number, reset cmdcnt
|
|
cnt = dot - begin_line(dot);
|
|
// Try to stay off of the Newline
|
|
if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
|
|
dot--;
|
|
}
|
|
|
|
/* NB! the CRASHME code is unmaintained, and doesn't currently build */
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
static int totalcmds = 0;
|
|
static int Mp = 85; // Movement command Probability
|
|
static int Np = 90; // Non-movement command Probability
|
|
static int Dp = 96; // Delete command Probability
|
|
static int Ip = 97; // Insert command Probability
|
|
static int Yp = 98; // Yank command Probability
|
|
static int Pp = 99; // Put command Probability
|
|
static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
|
|
static const char chars[20] = "\t012345 abcdABCD-=.$";
|
|
static const char *const words[20] = {
|
|
"this", "is", "a", "test",
|
|
"broadcast", "the", "emergency", "of",
|
|
"system", "quick", "brown", "fox",
|
|
"jumped", "over", "lazy", "dogs",
|
|
"back", "January", "Febuary", "March"
|
|
};
|
|
static const char *const lines[20] = {
|
|
"You should have received a copy of the GNU General Public License\n",
|
|
"char c, cm, *cmd, *cmd1;\n",
|
|
"generate a command by percentages\n",
|
|
"Numbers may be typed as a prefix to some commands.\n",
|
|
"Quit, discarding changes!\n",
|
|
"Forced write, if permission originally not valid.\n",
|
|
"In general, any ex or ed command (such as substitute or delete).\n",
|
|
"I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
|
|
"Please get w/ me and I will go over it with you.\n",
|
|
"The following is a list of scheduled, committed changes.\n",
|
|
"1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
|
|
"Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
|
|
"Any question about transactions please contact Sterling Huxley.\n",
|
|
"I will try to get back to you by Friday, December 31.\n",
|
|
"This Change will be implemented on Friday.\n",
|
|
"Let me know if you have problems accessing this;\n",
|
|
"Sterling Huxley recently added you to the access list.\n",
|
|
"Would you like to go to lunch?\n",
|
|
"The last command will be automatically run.\n",
|
|
"This is too much english for a computer geek.\n",
|
|
};
|
|
static char *multilines[20] = {
|
|
"You should have received a copy of the GNU General Public License\n",
|
|
"char c, cm, *cmd, *cmd1;\n",
|
|
"generate a command by percentages\n",
|
|
"Numbers may be typed as a prefix to some commands.\n",
|
|
"Quit, discarding changes!\n",
|
|
"Forced write, if permission originally not valid.\n",
|
|
"In general, any ex or ed command (such as substitute or delete).\n",
|
|
"I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
|
|
"Please get w/ me and I will go over it with you.\n",
|
|
"The following is a list of scheduled, committed changes.\n",
|
|
"1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
|
|
"Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
|
|
"Any question about transactions please contact Sterling Huxley.\n",
|
|
"I will try to get back to you by Friday, December 31.\n",
|
|
"This Change will be implemented on Friday.\n",
|
|
"Let me know if you have problems accessing this;\n",
|
|
"Sterling Huxley recently added you to the access list.\n",
|
|
"Would you like to go to lunch?\n",
|
|
"The last command will be automatically run.\n",
|
|
"This is too much english for a computer geek.\n",
|
|
};
|
|
|
|
// create a random command to execute
|
|
static void crash_dummy()
|
|
{
|
|
static int sleeptime; // how long to pause between commands
|
|
char c, cm, *cmd, *cmd1;
|
|
int i, cnt, thing, rbi, startrbi, percent;
|
|
|
|
// "dot" movement commands
|
|
cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
|
|
|
|
// is there already a command running?
|
|
if (chars_to_parse > 0)
|
|
goto cd1;
|
|
cd0:
|
|
startrbi = rbi = 0;
|
|
sleeptime = 0; // how long to pause between commands
|
|
memset(readbuffer, '\0', sizeof(readbuffer));
|
|
// generate a command by percentages
|
|
percent = (int) lrand48() % 100; // get a number from 0-99
|
|
if (percent < Mp) { // Movement commands
|
|
// available commands
|
|
cmd = cmd1;
|
|
M++;
|
|
} else if (percent < Np) { // non-movement commands
|
|
cmd = "mz<>\'\""; // available commands
|
|
N++;
|
|
} else if (percent < Dp) { // Delete commands
|
|
cmd = "dx"; // available commands
|
|
D++;
|
|
} else if (percent < Ip) { // Inset commands
|
|
cmd = "iIaAsrJ"; // available commands
|
|
I++;
|
|
} else if (percent < Yp) { // Yank commands
|
|
cmd = "yY"; // available commands
|
|
Y++;
|
|
} else if (percent < Pp) { // Put commands
|
|
cmd = "pP"; // available commands
|
|
P++;
|
|
} else {
|
|
// We do not know how to handle this command, try again
|
|
U++;
|
|
goto cd0;
|
|
}
|
|
// randomly pick one of the available cmds from "cmd[]"
|
|
i = (int) lrand48() % strlen(cmd);
|
|
cm = cmd[i];
|
|
if (strchr(":\024", cm))
|
|
goto cd0; // dont allow colon or ctrl-T commands
|
|
readbuffer[rbi++] = cm; // put cmd into input buffer
|
|
|
|
// now we have the command-
|
|
// there are 1, 2, and multi char commands
|
|
// find out which and generate the rest of command as necessary
|
|
if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
|
|
cmd1 = " \n\r0$^-+wWeEbBhjklHL";
|
|
if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
|
|
cmd1 = "abcdefghijklmnopqrstuvwxyz";
|
|
}
|
|
thing = (int) lrand48() % strlen(cmd1); // pick a movement command
|
|
c = cmd1[thing];
|
|
readbuffer[rbi++] = c; // add movement to input buffer
|
|
}
|
|
if (strchr("iIaAsc", cm)) { // multi-char commands
|
|
if (cm == 'c') {
|
|
// change some thing
|
|
thing = (int) lrand48() % strlen(cmd1); // pick a movement command
|
|
c = cmd1[thing];
|
|
readbuffer[rbi++] = c; // add movement to input buffer
|
|
}
|
|
thing = (int) lrand48() % 4; // what thing to insert
|
|
cnt = (int) lrand48() % 10; // how many to insert
|
|
for (i = 0; i < cnt; i++) {
|
|
if (thing == 0) { // insert chars
|
|
readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
|
|
} else if (thing == 1) { // insert words
|
|
strcat(readbuffer, words[(int) lrand48() % 20]);
|
|
strcat(readbuffer, " ");
|
|
sleeptime = 0; // how fast to type
|
|
} else if (thing == 2) { // insert lines
|
|
strcat(readbuffer, lines[(int) lrand48() % 20]);
|
|
sleeptime = 0; // how fast to type
|
|
} else { // insert multi-lines
|
|
strcat(readbuffer, multilines[(int) lrand48() % 20]);
|
|
sleeptime = 0; // how fast to type
|
|
}
|
|
}
|
|
strcat(readbuffer, "\033");
|
|
}
|
|
chars_to_parse = strlen(readbuffer);
|
|
cd1:
|
|
totalcmds++;
|
|
if (sleeptime > 0)
|
|
mysleep(sleeptime); // sleep 1/100 sec
|
|
}
|
|
|
|
// test to see if there are any errors
|
|
static void crash_test()
|
|
{
|
|
static time_t oldtim;
|
|
|
|
time_t tim;
|
|
char d[2], msg[80];
|
|
|
|
msg[0] = '\0';
|
|
if (end < text) {
|
|
strcat(msg, "end<text ");
|
|
}
|
|
if (end > textend) {
|
|
strcat(msg, "end>textend ");
|
|
}
|
|
if (dot < text) {
|
|
strcat(msg, "dot<text ");
|
|
}
|
|
if (dot > end) {
|
|
strcat(msg, "dot>end ");
|
|
}
|
|
if (screenbegin < text) {
|
|
strcat(msg, "screenbegin<text ");
|
|
}
|
|
if (screenbegin > end - 1) {
|
|
strcat(msg, "screenbegin>end-1 ");
|
|
}
|
|
|
|
if (msg[0]) {
|
|
printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
|
|
totalcmds, last_input_char, msg, SOs, SOn);
|
|
fflush(stdout);
|
|
while (safe_read(STDIN_FILENO, d, 1) > 0) {
|
|
if (d[0] == '\n' || d[0] == '\r')
|
|
break;
|
|
}
|
|
}
|
|
tim = time(NULL);
|
|
if (tim >= (oldtim + 3)) {
|
|
sprintf(status_buffer,
|
|
"Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
|
|
totalcmds, M, N, I, D, Y, P, U, end - text + 1);
|
|
oldtim = tim;
|
|
}
|
|
}
|
|
#endif
|