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145 lines
3.9 KiB
145 lines
3.9 KiB
/* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <math.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include "libavutil/libm.h" |
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#include "libavutil/timer.h" |
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#include "libavutil/eval.h" |
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static const double const_values[] = { |
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M_PI, |
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M_E, |
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0 |
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}; |
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static const char *const const_names[] = { |
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"PI", |
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"E", |
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0 |
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}; |
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int main(int argc, char **argv) |
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{ |
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int i; |
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double d; |
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const char *const *expr; |
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static const char *const exprs[] = { |
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"", |
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"1;2", |
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"-20", |
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"-PI", |
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"+PI", |
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"1+(5-2)^(3-1)+1/2+sin(PI)-max(-2.2,-3.1)", |
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"80G/80Gi", |
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"1k", |
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"1Gi", |
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"1gi", |
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"1GiFoo", |
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"1k+1k", |
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"1Gi*3foo", |
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"foo", |
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"foo(", |
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"foo()", |
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"foo)", |
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"sin", |
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"sin(", |
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"sin()", |
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"sin)", |
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"sin 10", |
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"sin(1,2,3)", |
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"sin(1 )", |
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"1", |
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"1foo", |
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"bar + PI + E + 100f*2 + foo", |
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"13k + 12f - foo(1, 2)", |
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"1gi", |
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"1Gi", |
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"st(0, 123)", |
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"st(1, 123); ld(1)", |
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"lte(0, 1)", |
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"lte(1, 1)", |
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"lte(1, 0)", |
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"lt(0, 1)", |
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"lt(1, 1)", |
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"gt(1, 0)", |
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"gt(2, 7)", |
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"gte(122, 122)", |
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/* compute 1+2+...+N */ |
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"st(0, 1); while(lte(ld(0), 100), st(1, ld(1)+ld(0));st(0, ld(0)+1)); ld(1)", |
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/* compute Fib(N) */ |
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"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)", |
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"while(0, 10)", |
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"st(0, 1); while(lte(ld(0),100), st(1, ld(1)+ld(0)); st(0, ld(0)+1))", |
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"isnan(1)", |
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"isnan(NAN)", |
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"isnan(INF)", |
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"isinf(1)", |
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"isinf(NAN)", |
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"isinf(INF)", |
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"floor(NAN)", |
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"floor(123.123)", |
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"floor(-123.123)", |
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"trunc(123.123)", |
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"trunc(-123.123)", |
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"ceil(123.123)", |
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"ceil(-123.123)", |
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"sqrt(1764)", |
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"isnan(sqrt(-1))", |
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"not(1)", |
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"not(NAN)", |
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"not(0)", |
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"6.0206dB", |
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"-3.0103dB", |
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NULL |
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}; |
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for (expr = exprs; *expr; expr++) { |
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printf("Evaluating '%s'\n", *expr); |
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av_expr_parse_and_eval(&d, *expr, |
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const_names, const_values, |
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NULL, NULL, NULL, NULL, NULL, 0, NULL); |
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if (isnan(d)) |
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printf("'%s' -> nan\n\n", *expr); |
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else |
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printf("'%s' -> %f\n\n", *expr, d); |
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} |
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av_expr_parse_and_eval(&d, "1+(5-2)^(3-1)+1/2+sin(PI)-max(-2.2,-3.1)", |
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const_names, const_values, |
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NULL, NULL, NULL, NULL, NULL, 0, NULL); |
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printf("%f == 12.7\n", d); |
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av_expr_parse_and_eval(&d, "80G/80Gi", |
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const_names, const_values, |
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NULL, NULL, NULL, NULL, NULL, 0, NULL); |
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printf("%f == 0.931322575\n", d); |
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if (argc > 1 && !strcmp(argv[1], "-t")) { |
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for (i = 0; i < 1050; i++) { |
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START_TIMER; |
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av_expr_parse_and_eval(&d, "1+(5-2)^(3-1)+1/2+sin(PI)-max(-2.2,-3.1)", |
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const_names, const_values, |
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NULL, NULL, NULL, NULL, NULL, 0, NULL); |
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STOP_TIMER("av_expr_parse_and_eval"); |
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} |
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} |
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return 0; |
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}
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