int main(void){
int i;
printf("%f == 12.7\n", ff_eval2("1+(5-2)^(3-1)+1/2+sin(PI)-max(-2.2,-3.1)", const_values, const_names, NULL, NULL, NULL, NULL, NULL, NULL));
printf("%f == 0.931322575\n", ff_eval2("80G/80Gi", const_values, const_names, NULL, NULL, NULL, NULL, NULL, NULL));
for(i=0; i<1050; i++){
START_TIMER
ff_eval2("1+(5-2)^(3-1)+1/2+sin(PI)-max(-2.2,-3.1)", const_values, const_names, NULL, NULL, NULL, NULL, NULL, NULL);
STOP_TIMER("ff_eval2")
}
return 0;
}
const AVOption *av_set_string(void *obj, const char *name, const char *val){
const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
if(o && o->offset==0 && o->type == FF_OPT_TYPE_CONST && o->unit){
return set_all_opt(obj, o->unit, o->default_val);
}
if(!o || !val || o->offset<=0)
return NULL;
if(o->type != FF_OPT_TYPE_STRING){
for(;;){
int i;
char buf[256];
int cmd=0;
double d;
char *error = NULL;
if(*val == '+' || *val == '-')
cmd= *(val++);
for(i=0; i<sizeof(buf)-1 && val[i] && val[i]!='+' && val[i]!='-'; i++)
buf[i]= val[i];
buf[i]=0;
val+= i;
d = ff_eval2(buf, const_values, const_names, NULL, NULL, NULL, NULL, NULL, &error);
if(isnan(d)) {
const AVOption *o_named= av_find_opt(obj, buf, o->unit, 0, 0);
if(o_named && o_named->type == FF_OPT_TYPE_CONST)
d= o_named->default_val;
else if(!strcmp(buf, "default")) d= o->default_val;
else if(!strcmp(buf, "max" )) d= o->max;
else if(!strcmp(buf, "min" )) d= o->min;
else if(!strcmp(buf, "none" )) d= 0;
else if(!strcmp(buf, "all" )) d= ~0;
else {
if (!error)
av_log(NULL, AV_LOG_ERROR, "Unable to parse option value \"%s\": %s\n", val, error);
return NULL;
}
}
if(o->type == FF_OPT_TYPE_FLAGS){
if (cmd=='+') d= av_get_int(obj, name, NULL) | (int64_t)d;
else if(cmd=='-') d= av_get_int(obj, name, NULL) &~(int64_t)d;
}else if(cmd=='-')
d= -d;
av_set_number(obj, name, d, 1, 1);
if(!*val)
return o;
}
return NULL;
}
memcpy(((uint8_t*)obj) + o->offset, val, sizeof(val));
return o;
}
const AVOption *av_set_string2(void *obj, const char *name, const char *val, int alloc){
const AVOption *o= av_find_opt(obj, name, NULL, 0, 0);
if(o && o->offset==0 && o->type == FF_OPT_TYPE_CONST && o->unit){
return set_all_opt(obj, o->unit, o->default_val);
}
if(!o || !val || o->offset<=0)
return NULL;
if(o->type == FF_OPT_TYPE_BINARY){
uint8_t **dst = (uint8_t **)(((uint8_t*)obj) + o->offset);
int *lendst = (int *)(dst + 1);
uint8_t *bin, *ptr;
int len = strlen(val);
av_freep(dst);
*lendst = 0;
if (len & 1) return NULL;
len /= 2;
ptr = bin = av_malloc(len);
while (*val) {
int a = hexchar2int(*val++);
int b = hexchar2int(*val++);
if (a < 0 || b < 0) {
av_free(bin);
return NULL;
}
*ptr++ = (a << 4) | b;
}
*dst = bin;
*lendst = len;
return o;
}
if(o->type != FF_OPT_TYPE_STRING){
int notfirst=0;
for(;;){
int i;
char buf[256];
int cmd=0;
double d;
const char *error = NULL;
if(*val == '+' || *val == '-')
cmd= *(val++);
for(i=0; i<sizeof(buf)-1 && val[i] && val[i]!='+' && val[i]!='-'; i++)
buf[i]= val[i];
buf[i]=0;
d = ff_eval2(buf, (double *)const_values, (const char **)const_names, NULL, NULL, NULL, NULL, NULL, &error);
if(isnan(d)) {
const AVOption *o_named= av_find_opt(obj, buf, o->unit, 0, 0);
if(o_named && o_named->type == FF_OPT_TYPE_CONST)
d= o_named->default_val;
else if(!strcmp(buf, "default")) d= o->default_val;
else if(!strcmp(buf, "max" )) d= o->max;
else if(!strcmp(buf, "min" )) d= o->min;
else if(!strcmp(buf, "none" )) d= 0;
else if(!strcmp(buf, "all" )) d= ~0;
else {
if (error)
av_log(NULL, AV_LOG_ERROR, "Unable to parse option value \"%s\": %s\n", val, error);
return NULL;
}
}
if(o->type == FF_OPT_TYPE_FLAGS){
if (cmd=='+') d= av_get_int(obj, name, NULL) | (int64_t)d;
else if(cmd=='-') d= av_get_int(obj, name, NULL) &~(int64_t)d;
}else{
if (cmd=='+') d= notfirst*av_get_double(obj, name, NULL) + d;
else if(cmd=='-') d= notfirst*av_get_double(obj, name, NULL) - d;
}
if (!av_set_number(obj, name, d, 1, 1))
return NULL;
val+= i;
if(!*val)
return o;
notfirst=1;
}
return NULL;
}
if(alloc){
av_free(*(void**)(((uint8_t*)obj) + o->offset));
val= av_strdup(val);
}
memcpy(((uint8_t*)obj) + o->offset, &val, sizeof(val));
return o;
}
