![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
We were only indirectly and by luck getting types, etc needed for this file, fix it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-gr8ejvzm7ojk6zwpeplyx9zu@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
167 lines
3.1 KiB
C
167 lines
3.1 KiB
C
#include "debug.h"
|
|
#include "util.h"
|
|
#include <linux/kernel.h>
|
|
|
|
int prefixcmp(const char *str, const char *prefix)
|
|
{
|
|
for (; ; str++, prefix++)
|
|
if (!*prefix)
|
|
return 0;
|
|
else if (*str != *prefix)
|
|
return (unsigned char)*prefix - (unsigned char)*str;
|
|
}
|
|
|
|
/*
|
|
* Used as the default ->buf value, so that people can always assume
|
|
* buf is non NULL and ->buf is NUL terminated even for a freshly
|
|
* initialized strbuf.
|
|
*/
|
|
char strbuf_slopbuf[1];
|
|
|
|
int strbuf_init(struct strbuf *sb, ssize_t hint)
|
|
{
|
|
sb->alloc = sb->len = 0;
|
|
sb->buf = strbuf_slopbuf;
|
|
if (hint)
|
|
return strbuf_grow(sb, hint);
|
|
return 0;
|
|
}
|
|
|
|
void strbuf_release(struct strbuf *sb)
|
|
{
|
|
if (sb->alloc) {
|
|
zfree(&sb->buf);
|
|
strbuf_init(sb, 0);
|
|
}
|
|
}
|
|
|
|
char *strbuf_detach(struct strbuf *sb, size_t *sz)
|
|
{
|
|
char *res = sb->alloc ? sb->buf : NULL;
|
|
if (sz)
|
|
*sz = sb->len;
|
|
strbuf_init(sb, 0);
|
|
return res;
|
|
}
|
|
|
|
int strbuf_grow(struct strbuf *sb, size_t extra)
|
|
{
|
|
char *buf;
|
|
size_t nr = sb->len + extra + 1;
|
|
|
|
if (nr < sb->alloc)
|
|
return 0;
|
|
|
|
if (nr <= sb->len)
|
|
return -E2BIG;
|
|
|
|
if (alloc_nr(sb->alloc) > nr)
|
|
nr = alloc_nr(sb->alloc);
|
|
|
|
/*
|
|
* Note that sb->buf == strbuf_slopbuf if sb->alloc == 0, and it is
|
|
* a static variable. Thus we have to avoid passing it to realloc.
|
|
*/
|
|
buf = realloc(sb->alloc ? sb->buf : NULL, nr * sizeof(*buf));
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
sb->buf = buf;
|
|
sb->alloc = nr;
|
|
return 0;
|
|
}
|
|
|
|
int strbuf_addch(struct strbuf *sb, int c)
|
|
{
|
|
int ret = strbuf_grow(sb, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
sb->buf[sb->len++] = c;
|
|
sb->buf[sb->len] = '\0';
|
|
return 0;
|
|
}
|
|
|
|
int strbuf_add(struct strbuf *sb, const void *data, size_t len)
|
|
{
|
|
int ret = strbuf_grow(sb, len);
|
|
if (ret)
|
|
return ret;
|
|
|
|
memcpy(sb->buf + sb->len, data, len);
|
|
return strbuf_setlen(sb, sb->len + len);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
int strbuf_addf(struct strbuf *sb, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
int ret;
|
|
|
|
va_start(ap, fmt);
|
|
ret = strbuf_addv(sb, fmt, ap);
|
|
va_end(ap);
|
|
return ret;
|
|
}
|
|
|
|
ssize_t strbuf_read(struct strbuf *sb, int fd, ssize_t hint)
|
|
{
|
|
size_t oldlen = sb->len;
|
|
size_t oldalloc = sb->alloc;
|
|
int ret;
|
|
|
|
ret = strbuf_grow(sb, hint ? hint : 8192);
|
|
if (ret)
|
|
return ret;
|
|
|
|
for (;;) {
|
|
ssize_t cnt;
|
|
|
|
cnt = read(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
|
|
if (cnt < 0) {
|
|
if (oldalloc == 0)
|
|
strbuf_release(sb);
|
|
else
|
|
strbuf_setlen(sb, oldlen);
|
|
return cnt;
|
|
}
|
|
if (!cnt)
|
|
break;
|
|
sb->len += cnt;
|
|
ret = strbuf_grow(sb, 8192);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
sb->buf[sb->len] = '\0';
|
|
return sb->len - oldlen;
|
|
}
|