int fsck_error_function(struct object *obj, int type, const char *fmt, ...)
{
va_list ap;
int len;
struct strbuf sb = STRBUF_INIT;
strbuf_addf(&sb, "object %s:", obj->sha1?sha1_to_hex(obj->sha1):"(null)");
va_start(ap, fmt);
len = vsnprintf(sb.buf + sb.len, strbuf_avail(&sb), fmt, ap);
va_end(ap);
if (len < 0)
len = 0;
if (len >= strbuf_avail(&sb)) {
strbuf_grow(&sb, len + 2);
va_start(ap, fmt);
len = vsnprintf(sb.buf + sb.len, strbuf_avail(&sb), fmt, ap);
va_end(ap);
if (len >= strbuf_avail(&sb))
die("this should not happen, your snprintf is broken");
}
error("%s", sb.buf);
strbuf_release(&sb);
return 1;
}
void trace_printf(const char *fmt, ...)
{
struct strbuf buf;
va_list ap;
int fd, len, need_close = 0;
fd = get_trace_fd(&need_close);
if (!fd)
return;
set_try_to_free_routine(do_nothing); /* is never reset */
strbuf_init(&buf, 64);
va_start(ap, fmt);
len = vsnprintf(buf.buf, strbuf_avail(&buf), fmt, ap);
va_end(ap);
if (len >= strbuf_avail(&buf)) {
strbuf_grow(&buf, len - strbuf_avail(&buf) + 128);
va_start(ap, fmt);
len = vsnprintf(buf.buf, strbuf_avail(&buf), fmt, ap);
va_end(ap);
if (len >= strbuf_avail(&buf))
die("broken vsnprintf");
}
strbuf_setlen(&buf, len);
write_or_whine_pipe(fd, buf.buf, buf.len, err_msg);
strbuf_release(&buf);
if (need_close)
close(fd);
}
static void output(struct merge_options *o, int v, const char *fmt, ...)
{
int len;
va_list ap;
if (!show(o, v))
return;
strbuf_grow(&o->obuf, o->call_depth * 2 + 2);
memset(o->obuf.buf + o->obuf.len, ' ', o->call_depth * 2);
strbuf_setlen(&o->obuf, o->obuf.len + o->call_depth * 2);
va_start(ap, fmt);
len = vsnprintf(o->obuf.buf + o->obuf.len, strbuf_avail(&o->obuf), fmt, ap);
va_end(ap);
if (len < 0)
len = 0;
if (len >= strbuf_avail(&o->obuf)) {
strbuf_grow(&o->obuf, len + 2);
va_start(ap, fmt);
len = vsnprintf(o->obuf.buf + o->obuf.len, strbuf_avail(&o->obuf), fmt, ap);
va_end(ap);
if (len >= strbuf_avail(&o->obuf)) {
die("this should not happen, your snprintf is broken");
}
}
strbuf_setlen(&o->obuf, o->obuf.len + len);
strbuf_add(&o->obuf, "\n", 1);
if (!o->buffer_output)
flush_output(o);
}
static int strbuf_addv(struct strbuf *sb, const char *fmt, va_list ap)
{
int len, ret;
va_list ap_saved;
if (!strbuf_avail(sb)) {
ret = strbuf_grow(sb, 64);
if (ret)
return ret;
}
va_copy(ap_saved, ap);
len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
if (len < 0)
return len;
if (len > strbuf_avail(sb)) {
ret = strbuf_grow(sb, len);
if (ret)
return ret;
len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap_saved);
va_end(ap_saved);
if (len > strbuf_avail(sb)) {
pr_debug("this should not happen, your vsnprintf is broken");
return -EINVAL;
}
}
return strbuf_setlen(sb, sb->len + len);
}
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_copy(cp, ap);
len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp);
va_end(cp);
if (len < 0)
die("BUG: your vsnprintf is broken (returned %d)", len);
if (len > strbuf_avail(sb)) {
strbuf_grow(sb, len);
len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
if (len > strbuf_avail(sb))
die("BUG: your vsnprintf is broken (insatiable)");
}
strbuf_setlen(sb, sb->len + len);
}
void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
{
int len;
va_list ap;
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 > 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))
panic("this should not happen, your snprintf is broken");
}
strbuf_setlen(sb, sb->len + len);
}
int main() {
struct strbuf buffer;
strbuf_init(&buffer, 0);
strbuf_grow(&buffer, 100);
print(buffer);
strbuf_addchars(&buffer, 'a', 90);
print(buffer);
strbuf_insert(&buffer, 40, "prince dhaliwal", 15);
strbuf_fread(&buffer, 100, stdin);
print(buffer);
printf("%zd", strbuf_avail(&buffer));
strbuf_release(&buffer);
return 0;
}
int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
{
int ch;
if (feof(fp))
return EOF;
strbuf_reset(sb);
//flockfile(fp);
while ((ch = fgetc(fp)) != EOF) {
if (!strbuf_avail(sb))
strbuf_grow(sb, 1);
sb->buf[sb->len++] = ch;
if (ch == term)
break;
}
//funlockfile(fp);
if (ch == EOF && sb->len == 0)
return EOF;
sb->buf[sb->len] = '\0';
return 0;
}
