86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
/*
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* Copyright (c) 2018 Oticon A/S
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef _CMDLINE_COMMON_H
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#define _CMDLINE_COMMON_H
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#include <stdbool.h>
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define _MAX_LINE_WIDTH 100 /*Total width of the help message*/
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/* Horizontal alignment of the 2nd column of the help message */
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#define _LONG_HELP_ALIGN 30
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#define _MAXOPT_SWITCH_LEN 32 /* Maximum allowed length for a switch name */
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#define _MAXOPT_NAME_LEN 32 /* Maximum allowed length for a variable name */
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#define _HELP_SWITCH "[-h] [--h] [--help] [-?]"
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#define _HELP_DESCR "Display this help"
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#define _MAX_STRINGY_LEN (_MAXOPT_SWITCH_LEN + _MAXOPT_NAME_LEN + 2 + 1 + 2 + 1)
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/**
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* Prototype for a callback function when an option is found:
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* inputs:
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* argv: Whole argv[i] option as received in main
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* offset: Offset to the end of the option string
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* (including a possible ':' or '=')
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* If the option had a value, it would be placed in &argv[offset]
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*/
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typedef void (*option_found_callback_f)(char *argv, int offset);
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/*
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* Structure defining each command line option
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*/
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struct args_struct_t {
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/*
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* if manual is set cmd_args_parse*() will ignore it except for
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* displaying it the help messages and initializing <dest> to its
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* default
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*/
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bool manual;
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/* For help messages, should it be wrapped in "[]" */
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bool is_mandatory;
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/* It is just a switch: it does not have something to store after */
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bool is_switch;
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/* Option name we search for: --<option> */
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char *option;
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/*
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* Name of the option destination in the help messages:
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* "--<option>=<name>"
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*/
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char *name;
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/* Type of option (see cmd_read_option_value()) */
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char type;
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/* Pointer to where the read value will be stored (may be NULL) */
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void *dest;
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/* Optional callback to be called when the switch is found */
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option_found_callback_f call_when_found;
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/* Long description for the help messages */
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char *descript;
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};
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#define ARG_TABLE_ENDMARKER \
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{false, false, false, NULL, NULL, 0, NULL, NULL, NULL}
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int cmd_is_option(const char *arg, const char *option, int with_value);
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int cmd_is_help_option(const char *arg);
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void cmd_read_option_value(const char *str, void *dest, const char type,
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const char *option);
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void cmd_args_set_defaults(struct args_struct_t args_struct[]);
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bool cmd_parse_one_arg(char *argv, struct args_struct_t args_struct[]);
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void cmd_print_switches_help(struct args_struct_t args_struct[]);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _CMDLINE_COMMON_H */
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