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Add s/foo/bar/: prefix for formats to substitute bar for foo.

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nicm
2015-11-18 14:13:55 +00:00
parent 64571368dc
commit 5a5b950e8b
2 changed files with 73 additions and 14 deletions
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80
format.c
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@@ -99,6 +99,7 @@ format_job_cmp(struct format_job *fj1, struct format_job *fj2)
#define FORMAT_TIMESTRING 0x1
#define FORMAT_BASENAME 0x2
#define FORMAT_DIRNAME 0x4
#define FORMAT_SUBSTITUTE 0x8
/* Entry in format tree. */
struct format_entry {
@@ -682,8 +683,9 @@ int
format_replace(struct format_tree *ft, const char *key, size_t keylen,
char **buf, size_t *len, size_t *off)
{
char *copy, *copy0, *endptr, *ptr, *saved, *trimmed, *value;
size_t valuelen;
char *copy, *copy0, *endptr, *ptr, *found, *new, *value;
char *from = NULL, *to = NULL;
size_t valuelen, newlen, fromlen, tolen, used;
u_long limit = 0;
int modifiers = 0, brackets;
@@ -721,6 +723,29 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
modifiers |= FORMAT_TIMESTRING;
copy += 2;
break;
case 's':
if (copy[1] != '/')
break;
from = copy + 2;
for (copy = from; *copy != '\0' && *copy != '/'; copy++)
/* nothing */;
if (copy[0] != '/' || copy == from) {
copy = copy0;
break;
}
copy[0] = '\0';
to = copy + 1;
for (copy = to; *copy != '\0' && *copy != '/'; copy++)
/* nothing */;
if (copy[0] != '/' || copy[1] != ':') {
copy = copy0;
break;
}
copy[0] = '\0';
modifiers |= FORMAT_SUBSTITUTE;
copy += 2;
break;
}
/*
@@ -734,7 +759,7 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
*ptr = '\0';
value = ptr + 1;
saved = format_find(ft, copy + 1, modifiers);
found = format_find(ft, copy + 1, modifiers);
brackets = 0;
for (ptr = ptr + 1; *ptr != '\0'; ptr++) {
@@ -748,29 +773,56 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
if (*ptr == '\0')
goto fail;
if (saved != NULL && *saved != '\0' &&
(saved[0] != '0' || saved[1] != '\0')) {
if (found != NULL && *found != '\0' &&
(found[0] != '0' || found[1] != '\0')) {
*ptr = '\0';
} else
value = ptr + 1;
value = format_expand(ft, value);
free(saved);
saved = value;
free(found);
} else {
saved = value = format_find(ft, copy, modifiers);
value = format_find(ft, copy, modifiers);
if (value == NULL)
saved = value = xstrdup("");
value = xstrdup("");
}
/* Perform substitution if any. */
if (modifiers & FORMAT_SUBSTITUTE) {
fromlen = strlen(from);
tolen = strlen(to);
newlen = strlen(value) + 1;
copy = new = xmalloc(newlen);
for (ptr = value; *ptr != '\0'; /* nothing */) {
if (strncmp(ptr, from, fromlen) != 0) {
*new++ = *ptr++;
continue;
}
used = new - copy;
newlen += tolen;
copy = xrealloc(copy, newlen);
new = copy + used;
memcpy(new, to, tolen);
new += tolen;
ptr += fromlen;
}
*new = '\0';
free(value);
value = copy;
}
/* Truncate the value if needed. */
if (limit != 0) {
value = trimmed = utf8_trimcstr(value, limit);
free(saved);
saved = trimmed;
new = utf8_trimcstr(value, limit);
free(value);
value = new;
}
valuelen = strlen(value);
/* Expand the buffer and copy in the value. */
valuelen = strlen(value);
while (*len - *off < valuelen + 1) {
*buf = xreallocarray(*buf, 2, *len);
*len *= 2;
@@ -778,7 +830,7 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
memcpy(*buf + *off, value, valuelen);
*off += valuelen;
free(saved);
free(value);
free(copy0);
return (0);