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Add regular expression support for the format search, match and

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substitute modifiers.
This commit is contained in:
nicm
2019-06-13 19:46:00 +00:00
parent 7e6a26cc9d
commit 3e72e98e3b
6 changed files with 233 additions and 61 deletions
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108
format.c
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@ -23,6 +23,7 @@
#include <errno.h>
#include <fnmatch.h>
#include <libgen.h>
#include <regex.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
@ -1247,7 +1248,7 @@ format_build_modifiers(struct format_tree *ft, const char **s, u_int *count)
cp++;
/* Check single character modifiers with no arguments. */
if (strchr("lmCbdtqETSWP<>", cp[0]) != NULL &&
if (strchr("lbdtqETSWP<>", cp[0]) != NULL &&
format_is_end(cp[1])) {
format_add_modifier(&list, count, cp, 1, NULL, 0);
cp++;
@ -1268,7 +1269,7 @@ format_build_modifiers(struct format_tree *ft, const char **s, u_int *count)
}
/* Now try single character with arguments. */
if (strchr("s=", cp[0]) == NULL)
if (strchr("mCs=", cp[0]) == NULL)
break;
c = cp[0];
@ -1329,39 +1330,67 @@ format_build_modifiers(struct format_tree *ft, const char **s, u_int *count)
return list;
}
/* Match against an fnmatch(3) pattern or regular expression. */
static char *
format_match(struct format_modifier *fm, const char *pattern, const char *text)
{
const char *s = "";
regex_t r;
int flags = 0;
if (fm->argc >= 1)
s = fm->argv[0];
if (strchr(s, 'r') == NULL) {
if (strchr(s, 'i') != NULL)
flags |= FNM_CASEFOLD;
if (fnmatch(pattern, text, flags) != 0)
return (xstrdup("0"));
} else {
flags = REG_EXTENDED|REG_NOSUB;
if (strchr(s, 'i') != NULL)
flags |= REG_ICASE;
if (regcomp(&r, pattern, flags) != 0)
return (xstrdup("0"));
if (regexec(&r, text, 0, NULL, 0) != 0) {
regfree(&r);
return (xstrdup("0"));
}
regfree(&r);
}
return (xstrdup("1"));
}
/* Perform substitution in string. */
static char *
format_substitute(const char *source, const char *from, const char *to)
format_sub(struct format_modifier *fm, const char *text, const char *pattern,
const char *with)
{
char *copy, *new;
const char *cp;
size_t fromlen, tolen, newlen, used;
char *value;
int flags = REG_EXTENDED;
fromlen = strlen(from);
tolen = strlen(to);
if (fm->argc >= 3 && strchr(fm->argv[2], 'i') != NULL)
flags |= REG_ICASE;
value = regsub(pattern, with, text, flags);
if (value == NULL)
return (xstrdup(text));
return (value);
}
newlen = strlen(source) + 1;
copy = new = xmalloc(newlen);
/* Search inside pane. */
static char *
format_search(struct format_modifier *fm, struct window_pane *wp, const char *s)
{
int ignore = 0, regex = 0;
char *value;
for (cp = source; *cp != '\0'; /* nothing */) {
if (strncmp(cp, from, fromlen) != 0) {
*new++ = *cp++;
continue;
}
used = new - copy;
newlen += tolen;
copy = xrealloc(copy, newlen);
new = copy + used;
memcpy(new, to, tolen);
new += tolen;
cp += fromlen;
if (fm->argc >= 1) {
if (strchr(fm->argv[0], 'i') != NULL)
ignore = 1;
if (strchr(fm->argv[0], 'r') != NULL)
regex = 1;
}
*new = '\0';
return (copy);
xasprintf(&value, "%u", window_pane_search(wp, s, regex, ignore));
return (value);
}
/* Loop over sessions. */
@ -1506,11 +1535,10 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
char *copy0, *condition, *found, *new;
char *value, *left, *right;
size_t valuelen;
int modifiers = 0, limit = 0;
int modifiers = 0, limit = 0, j;
struct format_modifier *list, *fm, *cmp = NULL, *search = NULL;
struct format_modifier *sub = NULL;
u_int i, count;
int j;
/* Make a copy of the key. */
copy = copy0 = xstrndup(key, keylen);
@ -1537,18 +1565,18 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
search = fm;
break;
case 's':
if (fm->argc != 2)
if (fm->argc < 2)
break;
sub = fm;
break;
case '=':
if (fm->argc != 1 && fm->argc != 2)
if (fm->argc < 1)
break;
limit = strtonum(fm->argv[0], INT_MIN, INT_MAX,
&errptr);
if (errptr != NULL)
limit = 0;
if (fm->argc == 2 && fm->argv[1] != NULL)
if (fm->argc >= 2 && fm->argv[1] != NULL)
marker = fm->argv[1];
break;
case 'l':
@ -1619,7 +1647,7 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
value = xstrdup("0");
} else {
format_log(ft, "search '%s' pane %%%u", copy, wp->id);
xasprintf(&value, "%u", window_pane_search(wp, copy));
value = format_search(fm, wp, copy);
}
} else if (cmp != NULL) {
/* Comparison of left and right. */
@ -1671,12 +1699,8 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
value = xstrdup("1");
else
value = xstrdup("0");
} else if (strcmp(cmp->modifier, "m") == 0) {
if (fnmatch(left, right, 0) == 0)
value = xstrdup("1");
else
value = xstrdup("0");
}
} else if (strcmp(cmp->modifier, "m") == 0)
value = format_match(fm, left, right);
free(right);
free(left);
@ -1754,8 +1778,8 @@ done:
/* Perform substitution if any. */
if (sub != NULL) {
new = format_substitute(value, sub->argv[0], sub->argv[1]);
format_log(ft, "substituted '%s' to '%s: %s", sub->argv[0],
new = format_sub(sub, value, sub->argv[0], sub->argv[1]);
format_log(ft, "substituted '%s' to '%s': %s", sub->argv[0],
sub->argv[1], new);
free(value);
value = new;