40 int main(
int argc,
char **argv)
44 const char *
const *expr;
45 static const char *
const exprs[] = {
51 "1+(5-2)^(3-1)+1/2+sin(PI)-max(-2.2,-3.1)",
72 "bar + PI + E + 100f*2 + foo",
73 "13k + 12f - foo(1, 2)",
87 "st(0, 1); while(lte(ld(0), 100), st(1, ld(1)+ld(0));st(0, ld(0)+1)); ld(1)",
89 "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)",
91 "st(0, 1); while(lte(ld(0),100), st(1, ld(1)+ld(0)); st(0, ld(0)+1))",
120 "ifnot(1, NaN) + if(0, 1)",
124 "taylor(eq(mod(ld(1),4),1)-eq(mod(ld(1),4),3), PI/2, 1)",
125 "root(sin(ld(0))-1, 2)",
126 "root(sin(ld(0))+6+sin(ld(0)/12)-log(ld(0)), 100)",
127 "7000000B*random(0)",
131 "gcd(30,55)*print(min(9,1))",
135 "between(10, -3, 10)",
136 "between(-4, -2, -1)",
145 for (expr = exprs; *expr; expr++) {
146 printf(
"Evaluating '%s'\n", *expr);
151 printf(
"'%s' -> nan\n\n", *expr);
153 printf(
"'%s' -> %f\n\n", *expr, d);
155 printf(
"av_expr_parse_and_eval failed\n");
161 printf(
"%f == 12.7\n", d);
163 printf(
"av_expr_parse_and_eval failed\n");
167 printf(
"%f == 0.931322575\n", d);
169 printf(
"av_expr_parse_and_eval failed\n");
171 if (argc > 1 && !strcmp(argv[1],
"-t")) {
172 for (i = 0; i < 1050; i++) {
178 printf(
"av_expr_parse_and_eval failed\n");
high precision timer, useful to profile code
static const double const_values[]
int av_expr_parse_and_eval(double *d, const char *s, const char *const *const_names, const double *const_values, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), void *opaque, int log_offset, void *log_ctx)
Parse and evaluate an expression.
#define i(width, name, range_min, range_max)
int main(int argc, char **argv)
Replacements for frequently missing libm functions.
static const char *const const_names[]
simple arithmetic expression evaluator