/*
* Copyright (c) 2009 Lukas Mejdrech
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @file
* Command-line arguments parsing functions
*/
#include <arg_parse.h>
#include <errno.h>
#include <str.h>
int arg_parse_short_long(const char *arg, const char *ashort, const char *along)
{
if (str_cmp(arg, ashort) == 0)
return 0;
if (str_lcmp(arg, along, str_length(along)) == 0)
return str_length(along);
return -1;
}
/** Parse the next argument as an integer.
*
* The actual argument is pointed by the index.
* Parse the offseted argument value if the offset is set
* or the next one if not.
*
* @param[in] argc The total number of arguments.
* @param[in] argv The arguments.
* @param[in,out] index The actual argument index. The index is incremented
* by the number of processed arguments.
* @param[out] value The parsed argument value.
* @param[in] offset The value offset in the actual argument. If not set,
* the next argument is parsed instead.
*
* @return EOK on success.
* @return ENOENT if the argument is missing.
* @return EINVAL if the argument is in wrong format.
*
*/
errno_t arg_parse_int(int argc, char *argv[], int *index, int *value,
int offset)
{
char *rest;
if (offset)
*value = strtol(argv[*index] + offset, &rest, 10);
else if ((*index) + 1 < argc) {
(*index)++;
*value = strtol(argv[*index], &rest, 10);
} else
return ENOENT;
if ((rest) && (*rest))
return EINVAL;
return EOK;
}
/** Parse the next named argument as an integral number.
*
* The actual argument is pointed by the index.
* Parse the offseted actual argument if the offset is set or the next
* one if not. Translate the argument using the parse_value function.
* Increment the actual index by the number of processed arguments.
*
* @param[in] argc The total number of arguments.
* @param[in] argv The arguments.
* @param[in,out] index The actual argument index. The index is
* incremented by the number of processed arguments.
* @param[out] value The parsed argument value.
* @param[in] offset The value offset in the actual argument. If not
* set, the next argument is parsed instead.
* @param[in] parse_value The translation function to parse the named value.
*
* @return EOK on success.
* @return ENOENT if the argument is missing.
* @return EINVAL if the argument name has not been found.
*
*/
errno_t arg_parse_name_int(int argc, char *argv[], int *index, int *value,
int offset, arg_parser parser)
{
char *arg;
errno_t ret = arg_parse_string(argc, argv, index, &arg, offset);
if (ret != EOK)
return ret;
return parser(arg, value);
}
/** Parse the next argument as a character string.
*
* The actual argument is pointed by the index.
* Parse the offseted actual argument value if the offset is set or the next
* one if not. Increment the actual index by the number of processed arguments.
*
* @param[in] argc The total number of arguments.
* @param[in] argv The arguments.
* @param[in,out] index The actual argument index. The index is
* incremented by the number of processed arguments.
* @param[out] value The parsed argument value.
* @param[in] offset The value offset in the actual argument. If not set,
* the next argument is parsed instead.
*
* @return EOK on success.
* @return ENOENT if the parameter is missing.
*
*/
errno_t arg_parse_string(int argc, char **argv, int *index, char **value,
int offset)
{
if (offset)
*value = argv[*index] + offset;
else if ((*index) + 1 < argc) {
(*index)++;
*value = argv[*index];
} else
return ENOENT;
return EOK;
}
/** @}
*/