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|2001-10-08 Rodney Brown <rbrown64@csc.com.au>

Browse Source 
|
|       * editors/sed.c: Fix multiline [aic] commands. Make # an endline
|       comment for compatibility. Codespace reduction.
|       * tests/testcases: Cope with move to subdirectories.
|       * testsuite/sed/sed-aic-commands: Add.
|
|   text           data     bss     dec     hex filename
|   3772             16       0    3788     ecc editors/sed.o
|   4516             16       0    4532    11b4 editors/sed.o.bu
This commit is contained in:
Eric Andersen
2001-11-10 10:49:42 +00:00
parent e5d58c3dcc
commit c52a6b0f10
3 changed files with 244 additions and 95 deletions
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189
editors/sed.c
View File

@@ -61,41 +61,40 @@ static int be_quiet = 0;
struct sed_cmd {
/* GENERAL FIELDS */
char delimiter; /* The delimiter used to separate regexps */
/* Order by alignment requirements */
/* address storage */
int beg_line; /* 'sed 1p' 0 == no begining line, apply commands to all lines */
int end_line; /* 'sed 1,3p' 0 == no end line, use only beginning. -1 == $ */
regex_t *beg_match; /* sed -e '/match/cmd' */
regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */
/* the command */
char cmd; /* p,d,s (add more at your leisure :-) */
/* SUBSTITUTION COMMAND SPECIFIC FIELDS */
/* sed -e 's/sub_match/replace/' */
regex_t *sub_match;
char *replace;
/* EDIT COMMAND (a,i,c) SPECIFIC FIELDS */
char *editline;
/* FILE COMMAND (r) SPECIFIC FIELDS */
char *filename;
/* address storage */
int beg_line; /* 'sed 1p' 0 == no begining line, apply commands to all lines */
int end_line; /* 'sed 1,3p' 0 == no end line, use only beginning. -1 == $ */
/* SUBSTITUTION COMMAND SPECIFIC FIELDS */
unsigned int num_backrefs:4; /* how many back references (\1..\9) */
/* Note: GNU/POSIX sed does not save more than nine backrefs, so
* we only use 4 bits to hold the number */
unsigned int sub_g:1; /* sed -e 's/foo/bar/g' (global) */
unsigned int sub_p:2; /* sed -e 's/foo/bar/p' (print substitution) */
/* GENERAL FIELDS */
char delimiter; /* The delimiter used to separate regexps */
/* EDIT COMMAND (a,i,c) SPEICIFIC FIELDS */
char *editline;
/* FILE COMMAND (r) SPEICIFIC FIELDS */
char *filename;
/* the command */
char cmd; /* p,d,s (add more at your leisure :-) */
};
/* globals */
@@ -104,6 +103,8 @@ static int ncmds = 0; /* number of sed commands */
/*static char *cur_file = NULL;*/ /* file currently being processed XXX: do I need this? */
const char * const semicolon_whitespace = "; \n\r\t\v\0";
#ifdef CONFIG_FEATURE_CLEAN_UP
static void destroy_cmd_strs()
{
@@ -142,23 +143,24 @@ static void destroy_cmd_strs()
* expression delimiter (typically a forward * slash ('/')) not preceeded by
* a backslash ('\').
*/
static int index_of_next_unescaped_regexp_delim(struct sed_cmd *sed_cmd, const char *str, int idx)
static int index_of_next_unescaped_regexp_delim(const struct sed_cmd * const sed_cmd, const char *str, int idx)
{
int bracket = -1;
int escaped = 0;
char ch;
for ( ; str[idx]; idx++) {
for ( ; (ch = str[idx]); idx++) {
if (bracket != -1) {
if (str[idx] == ']' && !(bracket == idx - 1 ||
if (ch == ']' && !(bracket == idx - 1 ||
(bracket == idx - 2 && str[idx-1] == '^')))
bracket = -1;
} else if (escaped)
escaped = 0;
else if (str[idx] == '\\')
else if (ch == '\\')
escaped = 1;
else if (str[idx] == '[')
else if (ch == '[')
bracket = idx;
else if (str[idx] == sed_cmd->delimiter)
else if (ch == sed_cmd->delimiter)
return idx;
}
@@ -208,7 +210,7 @@ static int get_address(struct sed_cmd *sed_cmd, const char *str, int *linenum, r
return idx;
}
static int parse_subst_cmd(struct sed_cmd *sed_cmd, const char *substr)
static int parse_subst_cmd(struct sed_cmd * const sed_cmd, const char *substr)
{
int oldidx, cflags = REG_NEWLINE;
char *match;
@@ -271,7 +273,7 @@ static int parse_subst_cmd(struct sed_cmd *sed_cmd, const char *substr)
break;
default:
/* any whitespace or semicolon trailing after a s/// is ok */
if (strchr("; \t\v\n\r", substr[idx]))
if (strchr(semicolon_whitespace, substr[idx]))
goto out;
/* else */
error_msg_and_die("bad option in substitution expression");
@@ -287,6 +289,11 @@ out:
return idx;
}
static void move_back(char *str, int offset)
{
memmove(str, str + offset, strlen(str + offset) + 1);
}
static int parse_edit_cmd(struct sed_cmd *sed_cmd, const char *editstr)
{
int idx = 0;
@@ -334,8 +341,7 @@ static int parse_edit_cmd(struct sed_cmd *sed_cmd, const char *editstr)
}
}
/* move the newline over the '\' before it (effectively eats the '\') */
memmove(&ptr[idx], &ptr[idx+1], strlen(&ptr[idx+1]));
ptr[strlen(ptr)-1] = 0;
move_back(&ptr[idx], 1);
slashes_eaten++;
/* substitue \r for \n if needed */
if (ptr[idx] == '\r')
@@ -343,10 +349,6 @@ static int parse_edit_cmd(struct sed_cmd *sed_cmd, const char *editstr)
}
out:
/* this accounts for discrepancies between the modified string and the
* original string passed in to this function */
idx += slashes_eaten;
/* figure out if we need to add a newline */
if (ptr[idx-1] != '\n') {
ptr[idx] = '\n';
@@ -355,10 +357,13 @@ out:
/* terminate string */
ptr[idx]= 0;
/* adjust for opening 2 chars [aic]\ */
idx += 2;
return idx;
/* this accounts for discrepancies between the modified string and the
* original string passed in to this function */
/* adjust for opening 2 chars [aic]\ */
return idx + slashes_eaten + 2;
}
@@ -391,7 +396,7 @@ static int parse_file_cmd(struct sed_cmd *sed_cmd, const char *filecmdstr)
/* the first non-whitespace we get is a filename. the filename ends when we
* hit a normal sed command terminator or end of string */
filenamelen = strcspn(&filecmdstr[idx], "; \n\r\t\v\0");
filenamelen = strcspn(&filecmdstr[idx], semicolon_whitespace);
sed_cmd->filename = xmalloc(filenamelen + 1);
safe_strncpy(sed_cmd->filename, &filecmdstr[idx], filenamelen + 1);
@@ -399,7 +404,7 @@ static int parse_file_cmd(struct sed_cmd *sed_cmd, const char *filecmdstr)
}
static char *parse_cmd_str(struct sed_cmd *sed_cmd, const char *cmdstr)
static char *parse_cmd_str(struct sed_cmd * const sed_cmd, const char *const cmdstr)
{
int idx = 0;
@@ -424,7 +429,7 @@ static char *parse_cmd_str(struct sed_cmd *sed_cmd, const char *cmdstr)
/* if it was a single-letter command that takes no arguments (such as 'p'
* or 'd') all we need to do is increment the index past that command */
if (strchr("pd", cmdstr[idx])) {
if (strchr("pd", sed_cmd->cmd)) {
idx++;
}
/* handle (s)ubstitution command */
@@ -451,21 +456,21 @@ static char *parse_cmd_str(struct sed_cmd *sed_cmd, const char *cmdstr)
return (char *)&cmdstr[idx];
}
static void add_cmd_str(const char *cmdstr)
static void add_cmd_str(const char * const cmdstr)
{
char *mystr = (char *)cmdstr;
do {
/* trim leading whitespace and semicolons */
memmove(mystr, &mystr[strspn(mystr, "; \n\r\t\v")], strlen(mystr));
move_back(mystr, strspn(mystr, semicolon_whitespace));
/* if we ate the whole thing, that means there was just trailing
* whitespace or a final / no-op semicolon. either way, get out */
if (strlen(mystr) == 0)
return;
/* if this is a comment, jump past it and keep going */
if (mystr[0] == '#') {
mystr = strpbrk(mystr, ";\n\r");
mystr = strpbrk(mystr, "\n\r");
continue;
}
/* grow the array */
@@ -503,23 +508,41 @@ static void load_cmd_file(char *filename)
}
}
struct pipeline {
char *buf;
int idx;
int len;
};
#define PIPE_MAGIC 0x7f
#define PIPE_GROW 64
#define pipeputc(c) \
void pipe_putc(struct pipeline *const pipeline, char c)
{
if (pipeline->buf[pipeline->idx] == PIPE_MAGIC) {
pipeline->buf =
xrealloc(pipeline->buf, pipeline->len + PIPE_GROW);
memset(pipeline->buf + pipeline->len, 0, PIPE_GROW);
pipeline->len += PIPE_GROW;
pipeline->buf[pipeline->len - 1] = PIPE_MAGIC;
}
pipeline->buf[pipeline->idx++] = (c);
}
#define pipeputc(c) pipe_putc(pipeline, c)
#if 0
{ if (pipeline[pipeline_idx] == PIPE_MAGIC) { \
pipeline = xrealloc(pipeline, pipeline_len+PIPE_GROW); \
memset(pipeline+pipeline_len, 0, PIPE_GROW); \
pipeline_len += PIPE_GROW; \
pipeline[pipeline_len-1] = PIPE_MAGIC; } \
pipeline[pipeline_idx++] = (c); }
#endif
static void print_subst_w_backrefs(const char *line, const char *replace,
regmatch_t *regmatch, char **pipeline_p, int *pipeline_idx_p,
int *pipeline_len_p, int matches)
regmatch_t *regmatch, struct pipeline *const pipeline, int matches)
{
char *pipeline = *pipeline_p;
int pipeline_idx = *pipeline_idx_p;
int pipeline_len = *pipeline_len_p;
int i;
/* go through the replacement string */
@@ -558,17 +581,13 @@ static void print_subst_w_backrefs(const char *line, const char *replace,
else
pipeputc(replace[i]);
}
*pipeline_p = pipeline;
*pipeline_idx_p = pipeline_idx;
*pipeline_len_p = pipeline_len;
}
static int do_subst_command(const struct sed_cmd *sed_cmd, char **line)
{
char *hackline = *line;
char *pipeline = 0;
int pipeline_idx = 0;
int pipeline_len = 0;
struct pipeline thepipe = { NULL, 0 , 0};
struct pipeline *const pipeline = &thepipe;
int altered = 0;
regmatch_t *regmatch = NULL;
@@ -581,11 +600,10 @@ static int do_subst_command(const struct sed_cmd *sed_cmd, char **line)
/* allocate more PIPE_GROW bytes
if replaced string is larger than original */
pipeline_len = strlen(hackline)+PIPE_GROW;
pipeline = xmalloc(pipeline_len);
memset(pipeline, 0, pipeline_len);
thepipe.len = strlen(hackline)+PIPE_GROW;
thepipe.buf = xcalloc(1, thepipe.len);
/* buffer magic */
pipeline[pipeline_len-1] = PIPE_MAGIC;
thepipe.buf[thepipe.len-1] = PIPE_MAGIC;
/* and now, as long as we've got a line to try matching and if we can match
* the search string, we make substitutions */
@@ -599,8 +617,7 @@ static int do_subst_command(const struct sed_cmd *sed_cmd, char **line)
/* then print the substitution string */
print_subst_w_backrefs(hackline, sed_cmd->replace, regmatch,
&pipeline, &pipeline_idx, &pipeline_len,
sed_cmd->num_backrefs);
pipeline, sed_cmd->num_backrefs);
/* advance past the match */
hackline += regmatch[0].rm_eo;
@@ -613,13 +630,13 @@ static int do_subst_command(const struct sed_cmd *sed_cmd, char **line)
}
for (; *hackline; hackline++) pipeputc(*hackline);
if (pipeline[pipeline_idx] == PIPE_MAGIC) pipeline[pipeline_idx] = 0;
if (thepipe.buf[thepipe.idx] == PIPE_MAGIC) thepipe.buf[thepipe.idx] = 0;
/* cleanup */
free(regmatch);
free(*line);
*line = pipeline;
*line = thepipe.buf;
return altered;
}
@@ -641,6 +658,7 @@ static void process_file(FILE *file)
/* for every line, go through all the commands */
for (i = 0; i < ncmds; i++) {
struct sed_cmd *sed_cmd = &sed_cmds[i];
/*
@@ -648,13 +666,13 @@ static void process_file(FILE *file)
*/
if (
/* no range necessary */
(sed_cmds[i].beg_line == 0 && sed_cmds[i].end_line == 0 &&
sed_cmds[i].beg_match == NULL &&
sed_cmds[i].end_match == NULL) ||
(sed_cmd->beg_line == 0 && sed_cmd->end_line == 0 &&
sed_cmd->beg_match == NULL &&
sed_cmd->end_match == NULL) ||
/* this line number is the first address we're looking for */
(sed_cmds[i].beg_line && (sed_cmds[i].beg_line == linenum)) ||
(sed_cmd->beg_line && (sed_cmd->beg_line == linenum)) ||
/* this line matches our first address regex */
(sed_cmds[i].beg_match && (regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0)) ||
(sed_cmd->beg_match && (regexec(sed_cmd->beg_match, line, 0, NULL, 0) == 0)) ||
/* we are currently within the beginning & ending address range */
still_in_range
) {
@@ -662,7 +680,7 @@ static void process_file(FILE *file)
/*
* actual sedding
*/
switch (sed_cmds[i].cmd) {
switch (sed_cmd->cmd) {
case 'p':
puts(line);
@@ -693,17 +711,17 @@ static void process_file(FILE *file)
/* if the user specified that they didn't want anything printed (i.e., a -n
* flag and no 'p' flag after the s///), then there's really no point doing
* anything here. */
if (be_quiet && !sed_cmds[i].sub_p)
if (be_quiet && !sed_cmd->sub_p)
break;
/* we print the line once, unless we were told to be quiet */
if (!be_quiet)
altered |= do_subst_command(&sed_cmds[i], &line);
altered |= do_subst_command(sed_cmd, &line);
/* we also print the line if we were given the 'p' flag
* (this is quite possibly the second printing) */
if (sed_cmds[i].sub_p)
altered |= do_subst_command(&sed_cmds[i], &line);
if (sed_cmd->sub_p)
altered |= do_subst_command(sed_cmd, &line);
if (altered && (i+1 >= ncmds || sed_cmds[i+1].cmd != 's'))
puts(line);
@@ -711,27 +729,24 @@ static void process_file(FILE *file)
case 'a':
puts(line);
fputs(sed_cmds[i].editline, stdout);
fputs(sed_cmd->editline, stdout);
altered++;
break;
case 'i':
fputs(sed_cmds[i].editline, stdout);
fputs(sed_cmd->editline, stdout);
break;
case 'c':
/* single-address case */
if (sed_cmds[i].end_match == NULL && sed_cmds[i].end_line == 0) {
fputs(sed_cmds[i].editline, stdout);
}
if ((sed_cmd->end_match == NULL && sed_cmd->end_line == 0)
/* multi-address case */
else {
/* matching text */
if (sed_cmds[i].end_match && (regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0))
fputs(sed_cmds[i].editline, stdout);
/* matching line numbers */
if (sed_cmds[i].end_line > 0 && sed_cmds[i].end_line == linenum)
fputs(sed_cmds[i].editline, stdout);
/* - matching text */
|| (sed_cmd->end_match && (regexec(sed_cmd->end_match, line, 0, NULL, 0) == 0))
/* - matching line numbers */
|| (sed_cmd->end_line > 0 && sed_cmd->end_line == linenum))
{
fputs(sed_cmd->editline, stdout);
}
altered++;
@@ -740,7 +755,7 @@ static void process_file(FILE *file)
case 'r': {
FILE *outfile;
puts(line);
outfile = fopen(sed_cmds[i].filename, "r");
outfile = fopen(sed_cmd->filename, "r");
if (outfile)
print_file(outfile);
/* else if we couldn't open the output file,
@@ -755,14 +770,14 @@ static void process_file(FILE *file)
*/
if (
/* this is a single-address command or... */
(sed_cmds[i].end_line == 0 && sed_cmds[i].end_match == NULL) || (
(sed_cmd->end_line == 0 && sed_cmd->end_match == NULL) || (
/* we were in the middle of our address range (this
* isn't the first time through) and.. */
(still_in_range == 1) && (
/* this line number is the last address we're looking for or... */
(sed_cmds[i].end_line && (sed_cmds[i].end_line == linenum)) ||
(sed_cmd->end_line && (sed_cmd->end_line == linenum)) ||
/* this line matches our last address regex */
(sed_cmds[i].end_match && (regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0))
(sed_cmd->end_match && (regexec(sed_cmd->end_match, line, 0, NULL, 0) == 0))
)
)
) {