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First cleanup pass, from Rob Sullivan. More to be done...

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This commit is contained in:
Rob Landley 2005-09-18 00:58:49 +00:00
parent 07e42dc056
commit d57ae8b796
2 changed files with 109 additions and 147 deletions
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6
include/applets.h
View File

@ -356,12 +356,12 @@
#ifdef CONFIG_LENGTH #ifdef CONFIG_LENGTH
APPLET(length, length_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER) APPLET(length, length_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
#endif #endif
#ifdef CONFIG_FEATURE_INITRD
APPLET_NOUSAGE("linuxrc", init_main, _BB_DIR_ROOT, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_LESS #ifdef CONFIG_LESS
APPLET(less, less_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER) APPLET(less, less_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
#endif #endif
#ifdef CONFIG_FEATURE_INITRD
APPLET_NOUSAGE("linuxrc", init_main, _BB_DIR_ROOT, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_LN #ifdef CONFIG_LN
APPLET(ln, ln_main, _BB_DIR_BIN, _BB_SUID_NEVER) APPLET(ln, ln_main, _BB_DIR_BIN, _BB_SUID_NEVER)
#endif #endif

238
miscutils/less.c
View File

@ -89,8 +89,8 @@ static int height;
static int width; static int width;
static char **files; static char **files;
static char filename[256]; static char filename[256];
static char buffer[100][256]; static char **buffer;
static char *flines[MAXLINES]; static char **flines;
static int current_file = 1; static int current_file = 1;
static int line_pos; static int line_pos;
static int num_flines; static int num_flines;
@ -98,11 +98,12 @@ static int num_files = 1;
static int past_eof; static int past_eof;
/* Command line options */ /* Command line options */
static int E_FLAG; static unsigned long flags;
static int M_FLAG; #define FLAG_E 1
static int N_FLAG; #define FLAG_M (1<<1)
static int m_FLAG; #define FLAG_m (1<<2)
static int TILDE_FLAG; #define FLAG_N (1<<3)
#define FLAG_TILDE (1<<4)
/* This is needed so that program behaviour changes when input comes from /* This is needed so that program behaviour changes when input comes from
stdin */ stdin */
@ -139,7 +140,7 @@ static void set_tty_cooked(void) {
tcsetattr(0, TCSANOW, &term_orig); tcsetattr(0, TCSANOW, &term_orig);
} }
/* Set terminal input to raw mode */ /* Set terminal input to raw mode (taken from vi.c) */
static void set_tty_raw(void) { static void set_tty_raw(void) {
tcgetattr(0, &term_orig); tcgetattr(0, &term_orig);
term_vi = term_orig; term_vi = term_orig;
@ -234,6 +235,13 @@ static void data_readlines(void) {
fp = (inp_stdin) ? stdin : bb_xfopen(filename, "rt"); fp = (inp_stdin) ? stdin : bb_xfopen(filename, "rt");
/* First of all, we need to know the number of lines so that flines can be initialised. */
for (i = 0; (!feof(fp)) && (i <= MAXLINES); i++)
fgets(current_line, 256, fp);
rewind(fp);
/* Initialise fp */
flines = malloc(i * sizeof(char *));
for (i = 0; (!feof(fp)) && (i <= MAXLINES); i++) { for (i = 0; (!feof(fp)) && (i <= MAXLINES); i++) {
strcpy(current_line, ""); strcpy(current_line, "");
fgets(current_line, 256, fp); fgets(current_line, 256, fp);
@ -249,36 +257,17 @@ static void data_readlines(void) {
fclose(fp); fclose(fp);
if (inp_stdin) inp = (inp_stdin) ? fopen(CURRENT_TTY, "r") : stdin;
inp = fopen(CURRENT_TTY, "r");
else
inp = stdin;
if (ea_inp_stdin) { if (ea_inp_stdin) {
fclose(inp); fclose(inp);
inp = fopen(CURRENT_TTY, "r"); inp = fopen(CURRENT_TTY, "r");
} }
if (N_FLAG) if (flags & FLAG_N)
add_linenumbers(); add_linenumbers();
} }
/* Free the file data */
static void free_flines(void) {
int i;
for (i = 0; i <= num_flines; i++)
free(flines[i]);
}
#ifdef CONFIG_FEATURE_LESS_FLAGS
/* Calculate the percentage the current line position is through the file */
static int calc_percent(void) {
return ((100 * (line_pos + height - 2) / num_flines) + 1);
}
#endif
/* Turn a percentage into a line number */ /* Turn a percentage into a line number */
static int reverse_percent(int percentage) { static int reverse_percent(int percentage) {
double linenum = percentage; double linenum = percentage;
@ -287,6 +276,13 @@ static int reverse_percent(int percentage) {
} }
#ifdef CONFIG_FEATURE_LESS_FLAGS #ifdef CONFIG_FEATURE_LESS_FLAGS
/* Interestingly, writing calc_percent as a function and not a prototype saves around 32 bytes
* on my build. */
static int calc_percent(void) {
return ((100 * (line_pos + height - 2) / num_flines) + 1);
}
/* Print a status line if -M was specified */ /* Print a status line if -M was specified */
static void m_status_print(void) { static void m_status_print(void) {
@ -342,9 +338,9 @@ static void status_print(void) {
/* Change the status if flags have been set */ /* Change the status if flags have been set */
#ifdef CONFIG_FEATURE_LESS_FLAGS #ifdef CONFIG_FEATURE_LESS_FLAGS
if (M_FLAG) if (flags & FLAG_M)
m_status_print(); m_status_print();
else if (m_FLAG) else if (flags & FLAG_m)
medium_status_print(); medium_status_print();
/* No flags set */ /* No flags set */
else { else {
@ -377,7 +373,6 @@ static void buffer_print(void) {
move_cursor(0,0); move_cursor(0,0);
for (i = 0; i < height - 1; i++) for (i = 0; i < height - 1; i++)
printf("%s", buffer[i]); printf("%s", buffer[i]);
status_print();
} }
else { else {
printf("%s", CLEAR); printf("%s", CLEAR);
@ -386,8 +381,9 @@ static void buffer_print(void) {
putchar('\n'); putchar('\n');
for (i = 0; i < height - 1; i++) for (i = 0; i < height - 1; i++)
printf("%s", buffer[i]); printf("%s", buffer[i]);
status_print();
} }
status_print();
} }
/* Initialise the buffer */ /* Initialise the buffer */
@ -395,18 +391,18 @@ static void buffer_init(void) {
int i; int i;
for (i = 0; i < (height - 1); i++) /* malloc the number of lines needed for the buffer */
memset(buffer[i], '\0', 256); buffer = xrealloc(buffer, height * sizeof(char *));
/* Fill the buffer until the end of the file or the /* Fill the buffer until the end of the file or the
end of the buffer is reached */ end of the buffer is reached */
for (i = 0; (i < (height - 1)) && (i <= num_flines); i++) { for (i = 0; (i < (height - 1)) && (i <= num_flines); i++) {
strcpy(buffer[i], flines[i]); buffer[i] = (char *) bb_xstrdup(flines[i]);
} }
/* If the buffer still isn't full, fill it with blank lines */ /* If the buffer still isn't full, fill it with blank lines */
for (; i < (height - 1); i++) { for (; i < (height - 1); i++) {
strcpy(buffer[i], ""); buffer[i] = "";
} }
} }
@ -419,7 +415,7 @@ static void buffer_down(int nlines) {
if (line_pos + (height - 3) + nlines < num_flines) { if (line_pos + (height - 3) + nlines < num_flines) {
line_pos += nlines; line_pos += nlines;
for (i = 0; i < (height - 1); i++) for (i = 0; i < (height - 1); i++)
strcpy(buffer[i], flines[line_pos + i]); buffer[i] = (char *) bb_xstrdup(flines[line_pos + i]);
} }
else { else {
/* As the number of lines requested was too large, we just move /* As the number of lines requested was too large, we just move
@ -427,12 +423,12 @@ static void buffer_down(int nlines) {
while (line_pos + (height - 3) + 1 < num_flines) { while (line_pos + (height - 3) + 1 < num_flines) {
line_pos += 1; line_pos += 1;
for (i = 0; i < (height - 1); i++) for (i = 0; i < (height - 1); i++)
strcpy(buffer[i], flines[line_pos + i]); buffer[i] = (char *) bb_xstrdup(flines[line_pos + i]);
} }
} }
/* We exit if the -E flag has been set */ /* We exit if the -E flag has been set */
if (E_FLAG && (line_pos + (height - 2) == num_flines)) if ((flags & FLAG_E) && (line_pos + (height - 2) == num_flines))
tless_exit(0); tless_exit(0);
} }
} }
@ -446,7 +442,7 @@ static void buffer_up(int nlines) {
if (line_pos - nlines >= 0) { if (line_pos - nlines >= 0) {
line_pos -= nlines; line_pos -= nlines;
for (i = 0; i < (height - 1); i++) for (i = 0; i < (height - 1); i++)
strcpy(buffer[i], flines[line_pos + i]); buffer[i] = (char *) bb_xstrdup(flines[line_pos + i]);
} }
else { else {
/* As the requested number of lines to move was too large, we /* As the requested number of lines to move was too large, we
@ -454,7 +450,7 @@ static void buffer_up(int nlines) {
while (line_pos != 0) { while (line_pos != 0) {
line_pos -= 1; line_pos -= 1;
for (i = 0; i < (height - 1); i++) for (i = 0; i < (height - 1); i++)
strcpy(buffer[i], flines[line_pos + i]); buffer[i] = (char *) bb_xstrdup(flines[line_pos + i]);
} }
} }
} }
@ -474,10 +470,10 @@ static void buffer_up(int nlines) {
is past the EOF */ is past the EOF */
for (i = 0; i < (height - 1); i++) { for (i = 0; i < (height - 1); i++) {
if (i < tilde_line - nlines + 1) if (i < tilde_line - nlines + 1)
strcpy(buffer[i], flines[line_pos + i]); buffer[i] = (char *) bb_xstrdup(flines[line_pos + i]);
else { else {
if (line_pos >= num_flines - height + 2) if (line_pos >= num_flines - height + 2)
strcpy(buffer[i], "~\n"); buffer[i] = "~\n";
} }
} }
} }
@ -496,15 +492,15 @@ static void buffer_line(int linenum) {
} }
else if (linenum < (num_flines - height - 2)) { else if (linenum < (num_flines - height - 2)) {
for (i = 0; i < (height - 1); i++) for (i = 0; i < (height - 1); i++)
strcpy(buffer[i], flines[linenum + i]); buffer[i] = (char *) bb_xstrdup(flines[linenum + i]);
line_pos = linenum; line_pos = linenum;
} }
else { else {
for (i = 0; i < (height - 1); i++) { for (i = 0; i < (height - 1); i++) {
if (linenum + i < num_flines + 2) if (linenum + i < num_flines + 2)
strcpy(buffer[i], flines[linenum + i]); buffer[i] = (char *) bb_xstrdup(flines[linenum + i]);
else else
strcpy(buffer[i], (TILDE_FLAG) ? "\n" : "~\n"); buffer[i] = (char *) bb_xstrdup((flags & FLAG_TILDE) ? "\n" : "~\n");
} }
line_pos = linenum; line_pos = linenum;
/* Set past_eof so buffer_down and buffer_up act differently */ /* Set past_eof so buffer_down and buffer_up act differently */
@ -512,6 +508,20 @@ static void buffer_line(int linenum) {
} }
} }
/* Reinitialise everything for a new file - free the memory and start over */
static void reinitialise(void) {
int i;
for (i = 0; i <= num_flines; i++)
free(flines[i]);
free(flines);
data_readlines();
buffer_init();
buffer_print();
}
static void examine_file(void) { static void examine_file(void) {
int newline_offset; int newline_offset;
@ -531,52 +541,23 @@ static void examine_file(void) {
inp_stdin = 0; inp_stdin = 0;
ea_inp_stdin = 1; ea_inp_stdin = 1;
free_flines(); reinitialise();
data_readlines();
buffer_init();
buffer_print();
} }
/* This function changes the file currently being paged. direction can be one of the following:
static void next_file(void) { * -1: go back one file
if (current_file != num_files) { * 0: go to the first file
current_file++; * 1: go forward one file
*/
static void change_file (int direction) {
if (current_file != ((direction > 0) ? num_files : 1)) {
current_file = direction ? current_file + direction : 1;
strcpy(filename, files[current_file - 1]); strcpy(filename, files[current_file - 1]);
free_flines(); reinitialise();
data_readlines();
buffer_init();
buffer_print();
} }
else { else {
clear_line(); clear_line();
printf("%s%s%s", HIGHLIGHT, "No next file", NORMAL); printf("%s%s%s", HIGHLIGHT, (direction > 0) ? "No next file" : "No previous file", NORMAL);
}
}
static void previous_file(void) {
if (current_file != 1) {
current_file--;
strcpy(filename, files[current_file - 1]);
free_flines();
data_readlines();
buffer_init();
buffer_print();
}
else {
clear_line();
printf("%s%s%s", HIGHLIGHT, "No previous file", NORMAL);
}
}
static void first_file(void) {
if (current_file != 1) {
current_file = 1;
strcpy(filename, files[current_file - 1]);
free_flines();
data_readlines();
buffer_init();
buffer_print();
} }
} }
@ -585,14 +566,14 @@ static void remove_current_file(void) {
int i; int i;
if (current_file != 1) { if (current_file != 1) {
previous_file(); change_file(-1);
for (i = 3; i <= num_files; i++) for (i = 3; i <= num_files; i++)
files[i - 2] = files[i - 1]; files[i - 2] = files[i - 1];
num_files--; num_files--;
buffer_print(); buffer_print();
} }
else { else {
next_file(); change_file(1);
for (i = 2; i <= num_files; i++) for (i = 2; i <= num_files; i++)
files[i - 2] = files[i - 1]; files[i - 2] = files[i - 1];
num_files--; num_files--;
@ -624,16 +605,16 @@ static void colon_process(void) {
break; break;
#endif #endif
case 'n': case 'n':
next_file(); change_file(1);
break; break;
case 'p': case 'p':
previous_file(); change_file(-1);
break; break;
case 'q': case 'q':
tless_exit(0); tless_exit(0);
break; break;
case 'x': case 'x':
first_file(); change_file(0);
break; break;
default: default:
break; break;
@ -715,10 +696,7 @@ static void regex_process(void) {
/* Get the uncompiled regular expression from the user */ /* Get the uncompiled regular expression from the user */
clear_line(); clear_line();
if (match_backwards) putchar((match_backwards) ? '?' : '/');
printf("?");
else
printf("/");
scanf("%s", uncomp_regex); scanf("%s", uncomp_regex);
/* Compile the regex and check for errors */ /* Compile the regex and check for errors */
@ -728,7 +706,6 @@ static void regex_process(void) {
for (i = 0; i <= num_flines; i++) { for (i = 0; i <= num_flines; i++) {
strcpy(current_line, process_regex_on_line(flines[i], pattern)); strcpy(current_line, process_regex_on_line(flines[i], pattern));
flines[i] = (char *) bb_xstrndup(current_line, sizeof(char) * (strlen(current_line)+1)); flines[i] = (char *) bb_xstrndup(current_line, sizeof(char) * (strlen(current_line)+1));
if (match_found) { if (match_found) {
match_lines[j] = i; match_lines[j] = i;
j++; j++;
@ -803,40 +780,35 @@ static void number_process(int first_digit) {
switch (keypress) { switch (keypress) {
case KEY_DOWN: case 'z': case 'd': case 'e': case ' ': case '\015': case KEY_DOWN: case 'z': case 'd': case 'e': case ' ': case '\015':
buffer_down(num); buffer_down(num);
buffer_print();
break; break;
case KEY_UP: case 'b': case 'w': case 'y': case 'u': case KEY_UP: case 'b': case 'w': case 'y': case 'u':
buffer_up(num); buffer_up(num);
buffer_print();
break; break;
case 'g': case '<': case 'G': case '>': case 'g': case '<': case 'G': case '>':
if (num_flines >= height - 2) if (num_flines >= height - 2)
buffer_line(num - 1); buffer_line(num - 1);
buffer_print();
break; break;
case 'p': case '%': case 'p': case '%':
buffer_line(reverse_percent(num)); buffer_line(reverse_percent(num));
buffer_print();
break; break;
#ifdef CONFIG_FEATURE_LESS_REGEXP #ifdef CONFIG_FEATURE_LESS_REGEXP
case 'n': case 'n':
goto_match(match_pos + num - 1); goto_match(match_pos + num - 1);
buffer_print();
break; break;
case '/': case '/':
regex_process(); regex_process();
goto_match(num - 1); goto_match(num - 1);
buffer_print();
break; break;
case '?': case '?':
num_back_match = num; num_back_match = num;
search_backwards(); search_backwards();
buffer_print();
break; break;
#endif #endif
default: default:
break; break;
} }
buffer_print();
} }
#ifdef CONFIG_FEATURE_LESS_FLAGCS #ifdef CONFIG_FEATURE_LESS_FLAGCS
@ -845,21 +817,21 @@ static void flag_change(void) {
int keypress; int keypress;
clear_line(); clear_line();
printf("-"); putchar('-');
keypress = tless_getch(); keypress = tless_getch();
switch (keypress) { switch (keypress) {
case 'M': case 'M':
M_FLAG = !M_FLAG; flags &= ~FLAG_M;
break; break;
case 'm': case 'm':
m_FLAG = !m_FLAG; flags &= ~FLAG_m;
break; break;
case 'E': case 'E':
E_FLAG = !E_FLAG; flags &= ~FLAG_E;
break; break;
case '~': case '~':
TILDE_FLAG = !TILDE_FLAG; flags &= ~FLAG_TILDE;
break; break;
default: default:
break; break;
@ -872,24 +844,24 @@ static void show_flag_status(void) {
int flag_val; int flag_val;
clear_line(); clear_line();
printf("_"); putchar('_');
keypress = tless_getch(); keypress = tless_getch();
switch (keypress) { switch (keypress) {
case 'M': case 'M':
flag_val = M_FLAG; flag_val = flags & FLAG_M;
break; break;
case 'm': case 'm':
flag_val = m_FLAG; flag_val = flags & FLAG_m;
break; break;
case '~': case '~':
flag_val = TILDE_FLAG; flag_val = flags & FLAG_TILDE;
break; break;
case 'N': case 'N':
flag_val = N_FLAG; flag_val = flags & FLAG_N;
break; break;
case 'E': case 'E':
flag_val = E_FLAG; flag_val = flags & FLAG_E;
break; break;
default: default:
flag_val = 0; flag_val = 0;
@ -897,7 +869,7 @@ static void show_flag_status(void) {
} }
clear_line(); clear_line();
printf("%s%s%i%s", HIGHLIGHT, "The status of the flag is: ", flag_val != 0, NORMAL); printf("%s%s%i%s", HIGHLIGHT, "The status of the flag is: ", flag_val, NORMAL);
} }
#endif #endif
@ -967,22 +939,20 @@ static void goto_mark(void) {
clear_line(); clear_line();
printf("Go to mark: "); printf("Go to mark: ");
letter = tless_getch(); letter = tless_getch();
clear_line();
if (isalpha(letter)) { if (isalpha(letter)) {
for (i = 0; i <= num_marks; i++) for (i = 0; i <= num_marks; i++)
if (letter == mark_lines[i][0]) { if (letter == mark_lines[i][0]) {
buffer_line(mark_lines[i][1]); buffer_line(mark_lines[i][1]);
break; break;
} }
if ((num_marks == 14) && (letter != mark_lines[14][0])) { if ((num_marks == 14) && (letter != mark_lines[14][0]))
clear_line();
printf("%s%s%s", HIGHLIGHT, "Mark not set", NORMAL); printf("%s%s%s", HIGHLIGHT, "Mark not set", NORMAL);
} }
} else
else {
clear_line();
printf("%s%s%s", HIGHLIGHT, "Invalid mark letter", NORMAL); printf("%s%s%s", HIGHLIGHT, "Invalid mark letter", NORMAL);
} }
}
#endif #endif
@ -1014,10 +984,10 @@ static void match_right_bracket(char bracket) {
int bracket_line = -1; int bracket_line = -1;
int i; int i;
if (strchr(flines[line_pos], bracket) == NULL) {
clear_line(); clear_line();
if (strchr(flines[line_pos], bracket) == NULL)
printf("%s%s%s", HIGHLIGHT, "No bracket in top line", NORMAL); printf("%s%s%s", HIGHLIGHT, "No bracket in top line", NORMAL);
}
else { else {
for (i = line_pos + 1; i < num_flines; i++) { for (i = line_pos + 1; i < num_flines; i++) {
if (strchr(flines[i], opp_bracket(bracket)) != NULL) { if (strchr(flines[i], opp_bracket(bracket)) != NULL) {
@ -1026,10 +996,8 @@ static void match_right_bracket(char bracket) {
} }
} }
if (bracket_line == -1) { if (bracket_line == -1)
clear_line();
printf("%s%s%s", HIGHLIGHT, "No matching bracket found", NORMAL); printf("%s%s%s", HIGHLIGHT, "No matching bracket found", NORMAL);
}
buffer_line(bracket_line - height + 2); buffer_line(bracket_line - height + 2);
buffer_print(); buffer_print();
@ -1041,8 +1009,9 @@ static void match_left_bracket (char bracket) {
int bracket_line = -1; int bracket_line = -1;
int i; int i;
if (strchr(flines[line_pos + height - 2], bracket) == NULL) {
clear_line(); clear_line();
if (strchr(flines[line_pos + height - 2], bracket) == NULL) {
printf("%s%s%s", HIGHLIGHT, "No bracket in bottom line", NORMAL); printf("%s%s%s", HIGHLIGHT, "No bracket in bottom line", NORMAL);
printf("%s", flines[line_pos + height]); printf("%s", flines[line_pos + height]);
sleep(4); sleep(4);
@ -1055,10 +1024,8 @@ static void match_left_bracket (char bracket) {
} }
} }
if (bracket_line == -1) { if (bracket_line == -1)
clear_line();
printf("%s%s%s", HIGHLIGHT, "No matching bracket found", NORMAL); printf("%s%s%s", HIGHLIGHT, "No matching bracket found", NORMAL);
}
buffer_line(bracket_line); buffer_line(bracket_line);
buffer_print(); buffer_print();
@ -1174,21 +1141,16 @@ static void keypress_process(int keypress) {
default: default:
break; break;
} }
if (isdigit(keypress)) if (isdigit(keypress))
number_process(keypress); number_process(keypress);
} }
int less_main(int argc, char **argv) { int less_main(int argc, char **argv) {
unsigned long flags;
int keypress; int keypress;
flags = bb_getopt_ulflags(argc, argv, "EMNm~"); flags = bb_getopt_ulflags(argc, argv, "EMmN~");
E_FLAG = (flags & 1);
M_FLAG = (flags & 2);
N_FLAG = (flags & 4);
m_FLAG = (flags & 8);
TILDE_FLAG = (flags & 16);
argc -= optind; argc -= optind;
argv += optind; argv += optind;