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Allow nested format expansion.

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This commit is contained in:
nicm
2013-10-10 11:50:36 +00:00
parent 40811eb8d4
commit 2bf2f5d58e
1 changed files with 16 additions and 7 deletions
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23
format.c
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@@ -193,7 +193,7 @@ 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;
char *copy, *copy0, *endptr, *ptr, *saved;
const char *value;
size_t valuelen;
u_long limit = ULONG_MAX;
@@ -247,10 +247,13 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
goto fail;
value = ptr + 1;
}
saved = format_expand(ft, value);
value = saved;
} else {
value = format_find(ft, copy);
if (value == NULL)
value = "";
saved = NULL;
}
valuelen = strlen(value);
@@ -266,6 +269,7 @@ format_replace(struct format_tree *ft, const char *key, size_t keylen,
memcpy(*buf + *off, value, valuelen);
*off += valuelen;
free(saved);
free(copy0);
return (0);
@@ -278,10 +282,10 @@ fail:
char *
format_expand(struct format_tree *ft, const char *fmt)
{
char *buf, *ptr;
const char *s;
char *buf;
const char *ptr, *s;
size_t off, len, n;
int ch;
int ch, brackets;
len = 64;
buf = xmalloc(len);
@@ -299,11 +303,16 @@ format_expand(struct format_tree *ft, const char *fmt)
fmt++;
ch = (u_char) *fmt++;
switch (ch) {
case '{':
ptr = strchr(fmt, '}');
if (ptr == NULL)
brackets = 1;
for (ptr = fmt; *ptr != '\0'; ptr++) {
if (*ptr == '{')
brackets++;
if (*ptr == '}' && --brackets == 0)
break;
}
if (*ptr != '}' || brackets != 0)
break;
n = ptr - fmt;