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Make strmatch() return 1 only if the string compared against the 

prefix does not contain other characters which may belong to an
identifier.

This allows to distinguish for example to have different constants
with the same prefix (e.g. "foo" and "foobar").

Originally committed as revision 25626 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefano Sabatini 2010-11-01 09:34:21 +00:00
parent 2b59fbe9b1
commit 4cabef0a9d
2 changed files with 5 additions and 2 deletions
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2
libavutil/avutil.h
View File

@ -41,7 +41,7 @@
#define LIBAVUTIL_VERSION_MAJOR 50
#define LIBAVUTIL_VERSION_MINOR 32
#define LIBAVUTIL_VERSION_MICRO 4
#define LIBAVUTIL_VERSION_MICRO 5
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
LIBAVUTIL_VERSION_MINOR, \

5
libavutil/eval.c
View File

@ -103,13 +103,16 @@ double av_strtod(const char *numstr, char **tail)
return d;
}
#define IS_IDENTIFIER_CHAR(c) ((c) - '0' <= 9U || (c) - 'a' <= 25U || (c) - 'A' <= 25U || (c) == '_')
static int strmatch(const char *s, const char *prefix)
{
int i;
for (i=0; prefix[i]; i++) {
if (prefix[i] != s[i]) return 0;
}
return 1;
/* return 1 only if the s identifier is terminated */
return !IS_IDENTIFIER_CHAR(s[i]);
}
struct AVExpr {