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Introduce ff_eval2 which is equivalent to ff_eval but does not log anything.

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Instead, error messages are passed upward by means of a struct member variable.

Originally committed as revision 6348 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Panagiotis Issaris 2006-09-26 22:01:33 +00:00
parent a0403006f8
commit ae41e29b5b
1 changed files with 21 additions and 5 deletions
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26
libavcodec/eval.c
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@ -52,6 +52,7 @@ typedef struct Parser{
double (**func2)(void *, double a, double b); // NULL terminated
char **func2_name; // NULL terminated
void *opaque;
char **error;
} Parser;
extern double av_strtod(const char *name, char **tail);
@ -88,7 +89,7 @@ static double evalPrimary(Parser *p){
p->s= strchr(p->s, '(');
if(p->s==NULL){
av_log(NULL, AV_LOG_ERROR, "Parser: missing ( in \"%s\"\n", next);
*p->error = "missing (";
p->s= next;
return NAN;
}
@ -99,7 +100,7 @@ static double evalPrimary(Parser *p){
d2= evalExpression(p);
}
if(p->s[0] != ')'){
av_log(NULL, AV_LOG_ERROR, "Parser: missing ) in \"%s\"\n", next);
*p->error = "missing )";
return NAN;
}
p->s++; // ")"
@ -138,7 +139,7 @@ static double evalPrimary(Parser *p){
}
}
av_log(NULL, AV_LOG_ERROR, "Parser: unknown function in \"%s\"\n", next);
*p->error = "unknown function";
return NAN;
}
@ -185,10 +186,10 @@ static double evalExpression(Parser *p){
return ret;
}
double ff_eval(char *s, double *const_value, const char **const_name,
double ff_eval2(char *s, double *const_value, const char **const_name,
double (**func1)(void *, double), const char **func1_name,
double (**func2)(void *, double, double), char **func2_name,
void *opaque){
void *opaque, char **error){
Parser p;
p.stack_index=100;
@ -200,10 +201,25 @@ double ff_eval(char *s, double *const_value, const char **const_name,
p.func2 = func2;
p.func2_name = func2_name;
p.opaque = opaque;
p.error= error;
return evalExpression(&p);
}
#if LIBAVCODEC_VERSION_INT < ((51<<16)+(16<<8)+0)
attribute_deprecated double ff_eval(char *s, double *const_value, const char **const_name,
double (**func1)(void *, double), const char **func1_name,
double (**func2)(void *, double, double), char **func2_name,
void *opaque){
char *error=NULL;
double ret;
ret = ff_eval2(s, const_value, const_name, func1, func1_name, func2, func2_name, opaque, &error);
if (error)
av_log(NULL, AV_LOG_ERROR, "Error evaluating \"%s\": %s\n", s, error);
return ret;
}
#endif
#ifdef TEST
#undef printf
static double const_values[]={