transmission/libtransmission/tr-getopt.h

68 lines
1.7 KiB
C

/*
* This file Copyright (C) 2008-2014 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
*/
#pragma once
#ifdef __cplusplus
extern "C" {
#endif
/**
* @addtogroup utils Utilities
* @{
*/
/** @brief Similar to optind, this is the current index into argv */
extern int tr_optind;
typedef struct tr_option
{
int val; /* the value to return from tr_getopt () */
const char * longName; /* --long-form */
const char * description; /* option's description for tr_getopt_usage () */
const char * shortName; /* short form */
int has_arg; /* 0 for no argument, 1 for argument */
const char * argName; /* argument's description for tr_getopt_usage () */
}
tr_option;
enum
{
/* all options have been processed */
TR_OPT_DONE = 0,
/* a syntax error was detected, such as a missing
* argument for an option that requires one */
TR_OPT_ERR = -1,
/* an unknown option was reached */
TR_OPT_UNK = -2
};
/**
* @brief similar to getopt ()
* @return TR_GETOPT_DONE, TR_GETOPT_ERR, TR_GETOPT_UNK, or the matching tr_option's `val' field
*/
int tr_getopt (const char * summary,
int argc,
const char * const * argv,
const tr_option * opts,
const char ** setme_optarg);
/** @brief prints the `Usage' help section to stdout */
void tr_getopt_usage (const char * appName,
const char * description,
const tr_option * opts);
#ifdef __cplusplus
} /* extern "C" */
#endif
/** @} */