1 | /* cmdline.c |
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2 | * Wrapper for GNU getopt which deals with standard options |
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3 | * Copyright (C) 1998-2001,2003 Olly Betts |
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4 | * |
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5 | * This program is free software; you can redistribute it and/or modify |
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6 | * it under the terms of the GNU General Public License as published by |
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7 | * the Free Software Foundation; either version 2 of the License, or |
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8 | * (at your option) any later version. |
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9 | * |
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10 | * This program is distributed in the hope that it will be useful, |
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | * GNU General Public License for more details. |
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14 | * |
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15 | * You should have received a copy of the GNU General Public License |
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16 | * along with this program; if not, write to the Free Software |
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17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 | */ |
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19 | |
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20 | #ifdef HAVE_CONFIG_H |
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21 | #include <config.h> |
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22 | #endif |
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23 | |
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24 | #include <ctype.h> |
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25 | #include <errno.h> |
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26 | #include <float.h> |
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27 | #include <stdio.h> |
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28 | #include <string.h> |
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29 | #include <limits.h> |
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30 | |
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31 | #include "getopt.h" |
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32 | |
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33 | #include "cmdline.h" |
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34 | #include "filename.h" |
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35 | |
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36 | #include "message.h" |
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37 | |
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38 | /* It might be useful to be able to disable all long options on small |
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39 | * platforms like pre-386 DOS and perhaps some PDAs... |
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40 | */ |
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41 | #if 0 |
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42 | # define getopt_long(ARGC, ARGV, STR, OPTS, PTR) getopt(ARGC, ARGV, STR) |
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43 | #endif |
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44 | |
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45 | /* |
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46 | * bad command line give: |
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47 | * <problem> |
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48 | * |
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49 | * <short syntax> |
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50 | * |
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51 | * --help gives: |
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52 | * <version> |
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53 | * |
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54 | * <short syntax> |
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55 | * |
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56 | * <table> |
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57 | * |
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58 | * <blurb> |
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59 | * |
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60 | * --version gives: |
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61 | * <version> |
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62 | */ |
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63 | |
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64 | /* |
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65 | * want to cope with optional/required parameters on long options |
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66 | * and also parameters on short options |
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67 | */ |
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68 | |
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69 | static const char newline_tabs[] = "\n\t\t\t\t"; |
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70 | |
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71 | static int argc; |
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72 | static char * const *argv; |
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73 | static const char *shortopts; |
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74 | static const struct option *longopts; |
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75 | static int *longind; |
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76 | static const struct help_msg *help; |
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77 | static int min_args, max_args; |
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78 | static const char *args_msg = NULL, *extra_msg = NULL; |
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79 | |
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80 | void |
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81 | cmdline_help(void) |
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82 | { |
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83 | while (help->opt) { |
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84 | const char *longopt = 0; |
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85 | int opt = help->opt; |
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86 | const struct option *o = 0; |
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87 | |
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88 | if (HLP_ISLONG(opt)) { |
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89 | o = longopts + HLP_DECODELONG(opt); |
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90 | longopt = o->name; |
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91 | opt = o->val; |
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92 | } |
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93 | |
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94 | if (isalnum(opt)) |
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95 | printf(" -%c%c", opt, longopt ? ',' : ' '); |
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96 | else |
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97 | fputs(" ", stdout); |
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98 | |
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99 | if (longopt) { |
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100 | int len = strlen(longopt); |
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101 | printf(" --%s", longopt); |
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102 | if (o && o->has_arg) { |
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103 | const char *p; |
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104 | len += len + 1; |
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105 | |
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106 | if (o->has_arg == optional_argument) { |
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107 | putchar('['); |
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108 | len += 2; |
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109 | } |
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110 | |
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111 | putchar('='); |
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112 | |
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113 | for (p = longopt; *p ; p++) putchar(toupper(*p)); |
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114 | |
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115 | if (o->has_arg == optional_argument) putchar(']'); |
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116 | } |
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117 | len = (len >> 3) + 2; |
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118 | if (len > 4) len = 0; |
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119 | fputs(newline_tabs + len, stdout); |
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120 | } else { |
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121 | fputs(newline_tabs + 1, stdout); |
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122 | } |
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123 | |
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124 | puts(help->msg); |
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125 | help++; |
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126 | } |
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127 | printf(" --help\t\t\t%s\n", msg(/*display this help and exit*/150)); |
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128 | printf(" --version\t\t\t%s\n", msg(/*output version information and exit*/151)); |
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129 | |
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130 | if (extra_msg) { |
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131 | putnl(); |
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132 | puts(extra_msg); |
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133 | } |
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134 | |
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135 | exit(0); |
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136 | } |
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137 | |
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138 | void |
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139 | cmdline_version(void) |
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140 | { |
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141 | printf("%s - "PRETTYPACKAGE" "VERSION"\n", msg_appname()); |
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142 | } |
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143 | |
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144 | void |
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145 | cmdline_syntax(void) |
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146 | { |
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147 | printf("\n%s: %s", msg(/*Syntax*/49), msg_appname()); |
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148 | if (help->opt) printf(" [%s]...", msg(/*OPTION*/153)); |
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149 | if (args_msg) { |
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150 | putchar(' '); |
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151 | puts(args_msg); |
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152 | return; |
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153 | } |
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154 | if (min_args) { |
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155 | int i = min_args; |
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156 | while (i--) printf(" %s", msg(/*FILE*/124)); |
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157 | } |
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158 | if (max_args == -1) { |
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159 | if (!min_args) printf(" [%s]", msg(/*FILE*/124)); |
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160 | fputs("...", stdout); |
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161 | } else if (max_args > min_args) { |
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162 | int i = max_args - min_args; |
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163 | while (i--) printf(" [%s]", msg(/*FILE*/124)); |
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164 | } |
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165 | putnl(); |
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166 | } |
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167 | |
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168 | static void |
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169 | syntax_and_help_pointer(void) |
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170 | { |
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171 | cmdline_syntax(); |
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172 | fprintf(stderr, msg(/*Try `%s --help' for more information. */157), |
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173 | msg_appname()); |
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174 | exit(1); |
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175 | } |
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176 | |
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177 | static void |
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178 | moan_and_die(int msgno) |
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179 | { |
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180 | fprintf(stderr, "%s: ", msg_appname()); |
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181 | fprintf(stderr, msg(msgno), optarg); |
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182 | fputnl(stderr); |
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183 | cmdline_syntax(); |
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184 | exit(1); |
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185 | } |
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186 | |
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187 | void |
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188 | cmdline_too_few_args(void) |
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189 | { |
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190 | fprintf(stderr, "%s: %s\n", msg_appname(), msg(/*too few arguments*/122)); |
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191 | syntax_and_help_pointer(); |
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192 | } |
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193 | |
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194 | void |
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195 | cmdline_too_many_args(void) |
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196 | { |
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197 | fprintf(stderr, "%s: %s\n", msg_appname(), msg(/*too many arguments*/123)); |
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198 | syntax_and_help_pointer(); |
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199 | } |
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200 | |
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201 | void |
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202 | cmdline_set_syntax_message(const char *args, const char *extra) |
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203 | { |
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204 | args_msg = args; |
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205 | extra_msg = extra; |
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206 | } |
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207 | |
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208 | int |
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209 | cmdline_int_arg(void) |
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210 | { |
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211 | long result; |
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212 | char *endptr; |
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213 | |
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214 | errno = 0; |
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215 | |
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216 | result = strtol(optarg, &endptr, 10); |
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217 | |
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218 | if (errno == ERANGE || result > INT_MAX || result < INT_MIN) { |
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219 | moan_and_die(/*numeric argument `%s' out of range*/185); |
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220 | } else if (*optarg == '\0' || *endptr != '\0') { |
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221 | moan_and_die(/*argument `%s' not an integer*/186); |
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222 | } |
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223 | |
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224 | return (int)result; |
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225 | } |
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226 | |
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227 | double |
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228 | cmdline_double_arg(void) |
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229 | { |
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230 | double result; |
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231 | char *endptr; |
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232 | |
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233 | errno = 0; |
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234 | |
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235 | result = strtod(optarg, &endptr); |
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236 | |
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237 | if (errno == ERANGE) { |
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238 | moan_and_die(/*numeric argument `%s' out of range*/185); |
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239 | } else if (*optarg == '\0' || *endptr != '\0') { |
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240 | moan_and_die(/*argument `%s' not a number*/187); |
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241 | } |
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242 | |
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243 | return result; |
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244 | } |
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245 | |
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246 | void |
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247 | cmdline_init(int argc_, char *const *argv_, const char *shortopts_, |
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248 | const struct option *longopts_, int *longind_, |
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249 | const struct help_msg *help_, |
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250 | int min_args_, int max_args_) |
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251 | { |
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252 | argc = argc_; |
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253 | argv = argv_; |
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254 | shortopts = shortopts_; |
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255 | longopts = longopts_; |
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256 | longind = longind_; |
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257 | help = help_; |
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258 | min_args = min_args_; |
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259 | max_args = max_args_; |
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260 | } |
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261 | |
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262 | int |
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263 | cmdline_getopt(void) |
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264 | { |
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265 | int opt = getopt_long(argc, argv, shortopts, longopts, longind); |
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266 | |
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267 | switch (opt) { |
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268 | case EOF: |
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269 | /* check valid # of args given - if not give syntax message */ |
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270 | if (argc - optind < min_args) { |
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271 | cmdline_too_few_args(); |
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272 | } else if (max_args >= 0 && argc - optind > max_args) { |
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273 | cmdline_too_many_args(); |
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274 | } |
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275 | break; |
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276 | case ':': /* parameter missing */ |
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277 | case '?': /* unknown opt, ambiguous match, or extraneous param */ |
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278 | /* getopt displays a message for us */ |
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279 | syntax_and_help_pointer(); |
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280 | break; |
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281 | case HLP_VERSION: /* --version */ |
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282 | cmdline_version(); |
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283 | exit(0); |
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284 | case HLP_HELP: /* --help */ |
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285 | cmdline_version(); |
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286 | cmdline_syntax(); |
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287 | putchar('\n'); |
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288 | cmdline_help(); |
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289 | exit(0); |
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290 | } |
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291 | return opt; |
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292 | } |
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