diff -r c4fd2813b127 -r d92eeb468dad misc/winutils/include/libavutil/eval.h --- a/misc/winutils/include/libavutil/eval.h Wed Jul 31 23:14:27 2019 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,113 +0,0 @@ -/* - * Copyright (c) 2002 Michael Niedermayer - * - * This file is part of Libav. - * - * Libav is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * Libav is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * simple arithmetic expression evaluator - */ - -#ifndef AVUTIL_EVAL_H -#define AVUTIL_EVAL_H - -#include "avutil.h" - -typedef struct AVExpr AVExpr; - -/** - * Parse and evaluate an expression. - * Note, this is significantly slower than av_expr_eval(). - * - * @param res a pointer to a double where is put the result value of - * the expression, or NAN in case of error - * @param s expression as a zero terminated string, for example "1+2^3+5*5+sin(2/3)" - * @param const_names NULL terminated array of zero terminated strings of constant identifiers, for example {"PI", "E", 0} - * @param const_values a zero terminated array of values for the identifiers from const_names - * @param func1_names NULL terminated array of zero terminated strings of funcs1 identifiers - * @param funcs1 NULL terminated array of function pointers for functions which take 1 argument - * @param func2_names NULL terminated array of zero terminated strings of funcs2 identifiers - * @param funcs2 NULL terminated array of function pointers for functions which take 2 arguments - * @param opaque a pointer which will be passed to all functions from funcs1 and funcs2 - * @param log_ctx parent logging context - * @return 0 in case of success, a negative value corresponding to an - * AVERROR code otherwise - */ -int av_expr_parse_and_eval(double *res, 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 an expression. - * - * @param expr a pointer where is put an AVExpr containing the parsed - * value in case of successful parsing, or NULL otherwise. - * The pointed to AVExpr must be freed with av_expr_free() by the user - * when it is not needed anymore. - * @param s expression as a zero terminated string, for example "1+2^3+5*5+sin(2/3)" - * @param const_names NULL terminated array of zero terminated strings of constant identifiers, for example {"PI", "E", 0} - * @param func1_names NULL terminated array of zero terminated strings of funcs1 identifiers - * @param funcs1 NULL terminated array of function pointers for functions which take 1 argument - * @param func2_names NULL terminated array of zero terminated strings of funcs2 identifiers - * @param funcs2 NULL terminated array of function pointers for functions which take 2 arguments - * @param log_ctx parent logging context - * @return 0 in case of success, a negative value corresponding to an - * AVERROR code otherwise - */ -int av_expr_parse(AVExpr **expr, const char *s, - const char * const *const_names, - const char * const *func1_names, double (* const *funcs1)(void *, double), - const char * const *func2_names, double (* const *funcs2)(void *, double, double), - int log_offset, void *log_ctx); - -/** - * Evaluate a previously parsed expression. - * - * @param const_values a zero terminated array of values for the identifiers from av_expr_parse() const_names - * @param opaque a pointer which will be passed to all functions from funcs1 and funcs2 - * @return the value of the expression - */ -double av_expr_eval(AVExpr *e, const double *const_values, void *opaque); - -/** - * Free a parsed expression previously created with av_expr_parse(). - */ -void av_expr_free(AVExpr *e); - -/** - * Parse the string in numstr and return its value as a double. If - * the string is empty, contains only whitespaces, or does not contain - * an initial substring that has the expected syntax for a - * floating-point number, no conversion is performed. In this case, - * returns a value of zero and the value returned in tail is the value - * of numstr. - * - * @param numstr a string representing a number, may contain one of - * the International System number postfixes, for example 'K', 'M', - * 'G'. If 'i' is appended after the postfix, powers of 2 are used - * instead of powers of 10. The 'B' postfix multiplies the value for - * 8, and can be appended after another postfix or used alone. This - * allows using for example 'KB', 'MiB', 'G' and 'B' as postfix. - * @param tail if non-NULL puts here the pointer to the char next - * after the last parsed character - */ -double av_strtod(const char *numstr, char **tail); - -#endif /* AVUTIL_EVAL_H */