diff options
Diffstat (limited to 'strbuf.c')
| -rw-r--r-- | strbuf.c | 29 |
1 files changed, 18 insertions, 11 deletions
@@ -30,8 +30,10 @@ void strbuf_init(struct strbuf *sb, size_t hint) { sb->alloc = sb->len = 0; sb->buf = strbuf_slopbuf; - if (hint) + if (hint) { strbuf_grow(sb, hint); + sb->buf[0] = '\0'; + } } void strbuf_release(struct strbuf *sb) @@ -195,24 +197,29 @@ void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len) void strbuf_addf(struct strbuf *sb, const char *fmt, ...) { - int len; va_list ap; + va_start(ap, fmt); + strbuf_vaddf(sb, fmt, ap); + va_end(ap); +} + +void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap) +{ + int len; + va_list cp; 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); + va_copy(cp, ap); + len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp); + va_end(cp); if (len < 0) - die("your vsnprintf is broken"); + die("BUG: your vsnprintf is broken (returned %d)", len); if (len > strbuf_avail(sb)) { strbuf_grow(sb, len); - va_start(ap, fmt); len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap); - va_end(ap); - if (len > strbuf_avail(sb)) { - die("this should not happen, your snprintf is broken"); - } + if (len > strbuf_avail(sb)) + die("BUG: your vsnprintf is broken (insatiable)"); } strbuf_setlen(sb, sb->len + len); } |