79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/*
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* Copyright (c) 2020, Alliance for Open Media. All rights reserved.
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#ifndef AOM_COMMON_ARGS_HELPER_H_
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#define AOM_COMMON_ARGS_HELPER_H_
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#include "aom/aom_encoder.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Maximum length of the error messages for the helper functions.
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#define ARG_ERR_MSG_MAX_LEN 200
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struct arg {
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char **argv;
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const char *name;
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const char *val;
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unsigned int argv_step;
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const struct arg_def *def;
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};
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struct arg_enum_list {
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const char *name;
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int val;
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};
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#define ARG_ENUM_LIST_END \
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{ 0 }
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typedef struct arg_def {
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const char *short_name;
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const char *long_name;
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int has_val; // 0: The argument must not have a value.
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// 1: The argument must have a value.
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// -1: The argument may or may not have a value.
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const char *desc;
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const struct arg_enum_list *enums;
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} arg_def_t;
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#define ARG_DEF(s, l, v, d) \
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{ s, l, v, d, NULL }
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#define ARG_DEF_ENUM(s, l, v, d, e) \
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{ s, l, v, d, e }
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#define ARG_DEF_LIST_END \
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{ 0 }
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/*
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* The helper functions below all take an optional parameter err_msg for
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* error reporting. When err_msg is not NULL (must point to a buffer
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* which is at least ARG_ERR_MSG_MAX_LEN bytes long), a related error message is
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* stored in it if an error occurs. It will be set to an empty string if no
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* error occurs.
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*/
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int arg_match_helper(struct arg *arg_, const struct arg_def *def, char **argv,
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char *err_msg);
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// Note: arg_match_helper() must be called before invoking these functions.
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unsigned int arg_parse_uint_helper(const struct arg *arg, char *err_msg);
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int arg_parse_int_helper(const struct arg *arg, char *err_msg);
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struct aom_rational arg_parse_rational_helper(const struct arg *arg,
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char *err_msg);
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int arg_parse_enum_helper(const struct arg *arg, char *err_msg);
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int arg_parse_enum_or_int_helper(const struct arg *arg, char *err_msg);
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int arg_parse_list_helper(const struct arg *arg, int *list, int n,
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char *err_msg);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // AOM_COMMON_ARGS_HELPER_H_
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