| 1 | /* |
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| 2 | * neercs console-based window manager |
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| 3 | * Copyright (c) 2006 Sam Hocevar <sam@zoy.org> |
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| 4 | * 2008 Jean-Yves Lamoureux <jylam@lnxscene.org> |
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| 5 | * All Rights Reserved |
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| 6 | * |
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| 7 | * |
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| 8 | * $Id: mygetopt.c 3551 2009-07-10 14:46:54Z pterjan $ |
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| 9 | * |
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| 10 | * This program is free software. It comes without any warranty, to |
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| 11 | * the extent permitted by applicable law. You can redistribute it |
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| 12 | * and/or modify it under the terms of the Do What The Fuck You Want |
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| 13 | * To Public License, Version 2, as published by Sam Hocevar. See |
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| 14 | * http://sam.zoy.org/wtfpl/COPYING for more details. |
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| 15 | */ |
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| 16 | |
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| 17 | /* |
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| 18 | * mygetopt.c: getopt_long reimplementation |
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| 19 | */ |
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| 20 | |
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| 21 | #include "config.h" |
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| 22 | |
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| 23 | #include <stdio.h> |
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| 24 | #include <string.h> |
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| 25 | |
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| 26 | #include "caca_types.h" |
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| 27 | |
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| 28 | #include "mygetopt.h" |
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| 29 | |
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| 30 | int myoptind = 1; |
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| 31 | char *myoptarg = NULL; |
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| 32 | |
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| 33 | /* XXX: this getopt_long implementation should not be trusted for other |
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| 34 | * applications without any serious peer reviewing. It “just works” with |
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| 35 | * zzuf but may fail miserably in other programs. */ |
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| 36 | int mygetopt(int argc, char * const _argv[], const char *optstring, |
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| 37 | const struct myoption *longopts, int *longindex) |
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| 38 | { |
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| 39 | char **argv = (char **)(uintptr_t)_argv; |
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| 40 | char *flag; |
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| 41 | int i; |
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| 42 | |
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| 43 | if(myoptind >= argc) |
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| 44 | return -1; |
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| 45 | |
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| 46 | flag = argv[myoptind]; |
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| 47 | |
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| 48 | if(flag[0] == '-' && flag[1] != '-') |
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| 49 | { |
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| 50 | char *tmp; |
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| 51 | int ret = flag[1]; |
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| 52 | |
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| 53 | if(ret == '\0') |
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| 54 | return -1; |
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| 55 | |
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| 56 | tmp = strchr(optstring, ret); |
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| 57 | if(!tmp || ret == ':') |
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| 58 | return '?'; |
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| 59 | |
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| 60 | myoptind++; |
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| 61 | if(tmp[1] == ':') |
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| 62 | { |
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| 63 | if(flag[2] != '\0') |
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| 64 | myoptarg = flag + 2; |
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| 65 | else |
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| 66 | if(myoptind >= argc) |
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| 67 | { |
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| 68 | if(tmp[2] != ':') |
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| 69 | { |
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| 70 | fprintf(stderr, "%s: `%s' needs an argument\n", argv[0], flag); |
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| 71 | return -2; |
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| 72 | } |
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| 73 | } |
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| 74 | else |
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| 75 | myoptarg = argv[myoptind++]; |
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| 76 | return ret; |
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| 77 | } |
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| 78 | |
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| 79 | if(flag[2] != '\0') |
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| 80 | { |
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| 81 | flag[1] = '-'; |
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| 82 | myoptind--; |
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| 83 | argv[myoptind]++; |
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| 84 | } |
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| 85 | |
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| 86 | return ret; |
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| 87 | } |
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| 88 | |
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| 89 | if(flag[0] == '-' && flag[1] == '-') |
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| 90 | { |
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| 91 | if(flag[2] == '\0') |
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| 92 | return -1; |
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| 93 | |
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| 94 | for(i = 0; longopts[i].name; i++) |
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| 95 | { |
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| 96 | size_t l = strlen(longopts[i].name); |
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| 97 | |
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| 98 | if(strncmp(flag + 2, longopts[i].name, l)) |
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| 99 | continue; |
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| 100 | |
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| 101 | switch(flag[2 + l]) |
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| 102 | { |
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| 103 | case '=': |
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| 104 | if(!longopts[i].has_arg) |
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| 105 | goto bad_opt; |
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| 106 | if(longindex) |
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| 107 | *longindex = i; |
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| 108 | myoptind++; |
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| 109 | myoptarg = flag + 2 + l + 1; |
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| 110 | return longopts[i].val; |
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| 111 | case '\0': |
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| 112 | if(longindex) |
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| 113 | *longindex = i; |
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| 114 | myoptind++; |
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| 115 | if(longopts[i].has_arg) |
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| 116 | myoptarg = argv[myoptind++]; |
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| 117 | return longopts[i].val; |
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| 118 | default: |
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| 119 | break; |
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| 120 | } |
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| 121 | } |
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| 122 | bad_opt: |
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| 123 | fprintf(stderr, "%s: unrecognized option `%s'\n", argv[0], flag); |
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| 124 | return '?'; |
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| 125 | } |
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| 126 | |
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| 127 | return -1; |
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| 128 | } |
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| 129 | |
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