transmission/libtransmission/tr-getopt.h

74 lines
1.9 KiB
C

/*
* This file Copyright (C) Mnemosyne LLC
*
* This file is licensed by the GPL version 2. Works owned by the
* Transmission project are granted a special exemption to clause 2(b)
* so that the bulk of its code can remain under the MIT license.
* This exemption does not extend to derived works not owned by
* the Transmission project.
*
* $Id$
*/
#ifndef TR_GETOPT_H
#define TR_GETOPT_H
#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 ** 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
/** @} */
#endif /* TR_GETOPT_H */