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Code Issues Releases Wiki Activity

common: add mp_tag_str() utility function

This commit is contained in:
wm4 2016-01-11 14:35:56 +01:00
parent a1f949d3b8
commit 994459e4ce
2 changed files with 20 additions and 0 deletions
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17
common/common.c
View File

@ -23,6 +23,7 @@
#include "talloc.h"
#include "misc/bstr.h"
#include "misc/ctype.h"
#include "common/common.h"
#define appendf(ptr, ...) \
@ -258,3 +259,19 @@ char *mp_strerror_buf(char *buf, size_t buf_size, int errnum)
av_strerror(AVERROR(errnum), buf, buf_size);
return buf;
}
char *mp_tag_str_buf(char *buf, size_t buf_size, uint32_t tag)
{
if (buf_size < 1)
return buf;
buf[0] = '\0';
for (int n = 0; n < 4; n++) {
uint8_t val = (tag >> (n * 8)) & 0xFF;
if (mp_isalnum(val) || val == '_' || val == ' ') {
mp_snprintf_cat(buf, buf_size, "%c", val);
} else {
mp_snprintf_cat(buf, buf_size, "[%d]", val);
}
}
return buf;
}

3
common/common.h
View File

@ -90,4 +90,7 @@ bool mp_append_escaped_string(void *talloc_ctx, struct bstr *dst,
char *mp_strerror_buf(char *buf, size_t buf_size, int errnum);
#define mp_strerror(e) mp_strerror_buf((char[80]){0}, 80, e)
char *mp_tag_str_buf(char *buf, size_t buf_size, uint32_t tag);
#define mp_tag_str(t) mp_tag_str_buf((char[22]){0}, 22, t)
#endif /* MPLAYER_MPCOMMON_H */