diff options
Diffstat (limited to 'strbuf.c')
| -rw-r--r-- | strbuf.c | 38 |
1 files changed, 35 insertions, 3 deletions
@@ -106,17 +106,25 @@ void strbuf_add(struct strbuf *sb, const void *data, size_t len) strbuf_setlen(sb, sb->len + len); } +void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len) +{ + strbuf_grow(sb, len); + memcpy(sb->buf + sb->len, sb->buf + pos, len); + strbuf_setlen(sb, sb->len + len); +} + void strbuf_addf(struct strbuf *sb, const char *fmt, ...) { int len; va_list ap; + if (!strbuf_avail(sb)) + strbuf_grow(sb, 64); va_start(ap, fmt); len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap); va_end(ap); - if (len < 0) { - len = 0; - } + if (len < 0) + die("your vsnprintf is broken"); if (len > strbuf_avail(sb)) { strbuf_grow(sb, len); va_start(ap, fmt); @@ -129,6 +137,30 @@ void strbuf_addf(struct strbuf *sb, const char *fmt, ...) strbuf_setlen(sb, sb->len + len); } +void strbuf_expand(struct strbuf *sb, const char *format, + const char **placeholders, expand_fn_t fn, void *context) +{ + for (;;) { + const char *percent, **p; + + percent = strchrnul(format, '%'); + strbuf_add(sb, format, percent - format); + if (!*percent) + break; + format = percent + 1; + + for (p = placeholders; *p; p++) { + if (!prefixcmp(format, *p)) + break; + } + if (*p) { + fn(sb, *p, context); + format += strlen(*p); + } else + strbuf_addch(sb, '%'); + } +} + size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f) { size_t res; |