39 double (*
const *
funcs1)(
void *,
double a);
41 double (*
const *
funcs2)(
void *,
double a,
double b);
79 d = strtod(numstr, &next);
82 if (*next >=
'E' && *next <=
'z') {
107 #define IS_IDENTIFIER_CHAR(c) ((c) - '0' <= 9U || (c) - 'a' <= 25U || (c) - 'A' <= 25U || (c) == '_')
109 static int strmatch(
const char *s,
const char *prefix)
112 for (i=0; prefix[i]; i++) {
113 if (prefix[i] != s[i])
return 0;
133 double (*
func2)(
void *, double, double);
165 case e_mod:
return e->
value * (d - floor(d/d2)*d2);
166 case e_max:
return e->
value * (d > d2 ? d : d2);
167 case e_min:
return e->
value * (d < d2 ? d : d2);
168 case e_eq:
return e->
value * (d == d2 ? 1.0 : 0.0);
169 case e_gt:
return e->
value * (d > d2 ? 1.0 : 0.0);
170 case e_gte:
return e->
value * (d >= d2 ? 1.0 : 0.0);
196 char *next = p->
s, *
s0 = p->
s;
223 p->
s= strchr(p->
s,
'(');
235 if (p->
s[0] !=
')') {
252 if (p->
s[0] !=
')') {
333 *sign= (*p->
s ==
'+') - (*p->
s ==
'-');
340 int sign, sign2, ret;
342 if ((ret =
parse_pow(&e0, p, &sign)) < 0)
347 if ((ret =
parse_pow(&e2, p, &sign2)) < 0) {
359 if (e0) e0->
value *= (sign|1);
371 while (p->
s[0]==
'*' || p->
s[0]==
'/') {
395 while (*p->
s ==
'+' || *p->
s ==
'-') {
423 while (*p->
s ==
';') {
467 const char *
const *func1_names,
double (*
const *
funcs1)(
void *,
double),
468 const char *
const *func2_names,
double (*
const *funcs2)(
void *,
double,
double),
469 int log_offset,
void *log_ctx)
482 if (!isspace(*s++)) *wp++ = s[-1];
525 const char *
const *const_names,
const double *
const_values,
526 const char *
const *func1_names,
double (*
const *
funcs1)(
void *,
double),
527 const char *
const *func2_names,
double (*
const *funcs2)(
void *,
double,
double),
528 void *opaque,
int log_offset,
void *log_ctx)
531 int ret =
av_expr_parse(&e, s, const_names, func1_names,
funcs1, func2_names, funcs2, log_offset, log_ctx);
539 return isnan(*d) ?
AVERROR(EINVAL) : 0;
546 static double const_values[] = {
552 static const char *const_names[] = {
558 int main(
int argc,
char **argv)
562 const char **expr, *exprs[] = {
568 "1+(5-2)^(3-1)+1/2+sin(PI)-max(-2.2,-3.1)",
589 "bar + PI + E + 100f*2 + foo",
590 "13k + 12f - foo(1, 2)",
596 "st(0, 1); while(lte(ld(0), 100), st(1, ld(1)+ld(0));st(0, ld(0)+1)); ld(1)",
598 "st(1, 1); st(2, 2); st(0, 1); while(lte(ld(0),10), st(3, ld(1)+ld(2)); st(1, ld(2)); st(2, ld(3)); st(0, ld(0)+1)); ld(3)",
600 "st(0, 1); while(lte(ld(0),100), st(1, ld(1)+ld(0)); st(0, ld(0)+1))",
618 for (expr = exprs; *expr; expr++) {
619 printf(
"Evaluating '%s'\n", *expr);
621 const_names, const_values,
623 printf(
"'%s' -> %f\n\n", *expr, d);
627 const_names, const_values,
629 printf(
"%f == 12.7\n", d);
631 const_names, const_values,
633 printf(
"%f == 0.931322575\n", d);
635 if (argc > 1 && !strcmp(argv[1],
"-t")) {
636 for (i = 0; i < 1050; i++) {
639 const_names, const_values,