arg_parse.c

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00001 /*
00002  * Copyright (c) 2009 Lukas Mejdrech
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  *
00009  * - Redistributions of source code must retain the above copyright
00010  *   notice, this list of conditions and the following disclaimer.
00011  * - Redistributions in binary form must reproduce the above copyright
00012  *   notice, this list of conditions and the following disclaimer in the
00013  *   documentation and/or other materials provided with the distribution.
00014  * - The name of the author may not be used to endorse or promote products
00015  *   derived from this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
00018  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00019  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
00020  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
00021  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
00022  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00023  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00024  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00025  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
00026  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00027  */
00028 
00033 #include <arg_parse.h>
00034 #include <errno.h>
00035 #include <str.h>
00036 
00037 int arg_parse_short_long(const char *arg, const char *ashort, const char *along)
00038 {
00039         if (str_cmp(arg, ashort) == 0)
00040                 return 0;
00041         
00042         if (str_lcmp(arg, along, str_length(along)) == 0)
00043                 return str_length(along);
00044         
00045         return -1;
00046 }
00047 
00067 int arg_parse_int(int argc, char *argv[], int *index, int *value,
00068     int offset)
00069 {
00070         char *rest;
00071         
00072         if (offset)
00073                 *value = strtol(argv[*index] + offset, &rest, 10);
00074         else if ((*index) + 1 < argc) {
00075                 (*index)++;
00076                 *value = strtol(argv[*index], &rest, 10);
00077         } else
00078                 return ENOENT;
00079         
00080         if ((rest) && (*rest))
00081                 return EINVAL;
00082         
00083         return EOK;
00084 }
00085 
00107 int arg_parse_name_int(int argc, char *argv[], int *index, int *value,
00108     int offset, arg_parser parser)
00109 {
00110         char *arg;
00111         
00112         int ret = arg_parse_string(argc, argv, index, &arg, offset);
00113         if (ret != EOK)
00114                 return ret;
00115         
00116         return parser(arg, value);
00117 }
00118 
00137 int arg_parse_string(int argc, char **argv, int *index, char **value,
00138     int offset)
00139 {
00140         if (offset)
00141                 *value = argv[*index] + offset;
00142         else if ((*index) + 1 < argc) {
00143                 (*index)++;
00144                 *value = argv[*index];
00145         } else
00146                 return ENOENT;
00147         
00148         return EOK;
00149 }
00150 

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