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annotate lwlib/lw_cmdline.c @ 6:1e5e8ec406fb

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Various output cleanups for --help and --usage in lw_cmdline
author lost@l-w.ca
date Sat, 22 Jan 2011 09:31:43 -0700
parents 0e01d1343c02
children fdc11ef4115b
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1 /*
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2 lw_cmdline.c
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3
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4 Copyright © 2010 William Astle
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5
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6 This file is part of LWTOOLS.
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7
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8 LWTOOLS is free software: you can redistribute it and/or modify it under the
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9 terms of the GNU General Public License as published by the Free Software
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10 Foundation, either version 3 of the License, or (at your option) any later
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11 version.
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12
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13 This program is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 more details.
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17
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18 You should have received a copy of the GNU General Public License along with
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19 this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
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22 #include <stdio.h>
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23 #include <stdlib.h>
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24 #include <string.h>
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25
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26 #include "lw_alloc.h"
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27
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28 #define ___lw_cmdline_c_seen___
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29 #include "lw_cmdline.h"
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30
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31 #define DOCCOL 30
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32 #define LLEN 78
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33
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34 static struct lw_cmdline_options builtin[3] =
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35 {
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36 { "help", '?', 0, 0, "give this help list" },
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37 { "usage", 0, 0, 0, "give a short usage message" },
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38 { "version", 'V', 0, 0, "print program version" }
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39 };
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40
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41 static int cmpr(const void *e1, const void *e2)
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42 {
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43 struct lw_cmdline_options **o1, **o2;
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44 o1 = (struct lw_cmdline_options **)e1;
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45 o2 = (struct lw_cmdline_options **)e2;
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46
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47 return strcmp((*o1) -> name, (*o2) -> name);
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48 }
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49
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50 static int cmpr2(const void *e1, const void *e2)
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51 {
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52 struct lw_cmdline_options **o1, **o2;
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53 o1 = (struct lw_cmdline_options **)e1;
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54 o2 = (struct lw_cmdline_options **)e2;
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55
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56 if ((*o1) -> key < ((*o2) -> key))
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57 return -1;
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58 if ((*o1) -> key > ((*o2) -> key))
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59 return 1;
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60 return 0;
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61 }
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62
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63 static void lw_cmdline_usage(struct lw_cmdline_parser *parser, char *name)
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64 {
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65 struct lw_cmdline_options **slist, **llist;
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66 int nopt;
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67 int i;
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68 int t;
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69 int col;
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70
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71 for (nopt = 0; parser -> options[nopt].name; nopt++)
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72 /* do nothing */ ;
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73
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74 slist = lw_alloc(sizeof(struct lw_cmdline_options *) * (nopt + 3));
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75 llist = lw_alloc(sizeof(struct lw_cmdline_options *) * (nopt + 3));
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76
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77 for (i = 0; i < nopt; i++)
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78 {
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79 slist[i] = &(parser -> options[i]);
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80 llist[i] = &(parser -> options[i]);
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81 }
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82
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83 /* now sort the two lists */
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84 qsort(slist, nopt, sizeof(struct lw_cmdline_options *), cmpr2);
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85 qsort(llist, nopt, sizeof(struct lw_cmdline_options *), cmpr);
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86
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87 /* now append the automatic options */
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88 slist[nopt] = &(builtin[0]);
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89 slist[nopt + 1] = &(builtin[1]);
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90 slist[nopt + 2] = &(builtin[2]);
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91
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92 llist[nopt] = &(builtin[0]);
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93 llist[nopt + 1] = &(builtin[1]);
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94 llist[nopt + 2] = &(builtin[2]);
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95
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96 /* now show the usage message */
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97 printf("Usage: %s", name);
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98
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99 col = 7 + strlen(name);
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100
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101 /* print short options that take no args */
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102 t = 0;
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103 for (i = 0; i < nopt + 3; i++)
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104 {
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105 if (slist[i]->key > 0x20 && slist[i]->key < 0x7f)
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106 {
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107 if (slist[i]->arg == NULL)
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108 {
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109 if (!t)
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110 {
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111 printf(" [-");
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112 t = 1;
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113 col += 3;
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114 }
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115 printf("%c", slist[i]->key);
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116 col++;
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117 }
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118 }
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119 }
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120 if (t)
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121 {
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122 col++;
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123 printf("]");
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124 }
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125
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126 /* print short options that take args */
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127 for (i = 0; i < nopt + 3; i++)
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128 {
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129 if (slist[i]->key > 0x20 && slist[i]->key < 0x7f && slist[i] -> arg)
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130 {
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131 if (slist[i]->flags & lw_cmdline_opt_optional)
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132 {
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133 t = 7 + strlen(slist[i] -> arg);
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134 if (col + t > LLEN)
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135 {
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136 printf("\n ");
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137 col = 7;
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138 }
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139 printf(" [-%c[%s]]", slist[i]->key, slist[i]->arg);
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140 col += t;
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141 }
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142 else
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143 {
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144 t = 6 + strlen(slist[i] -> arg);
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145 if (col + t > LLEN)
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146 {
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147 printf("\n ");
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148 col = 7;
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149 }
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150 printf(" [-%c %s]", slist[i]->key, slist[i]->arg);
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151 col += t;
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152 }
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153 }
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154 }
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155
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156 /* print long options */
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157 for (i = 0; i < nopt + 3; i++)
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158 {
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159 if (llist[i]->arg)
a4812d57ed13 Started implementing command line parsing in lwlib
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diff changeset
160 {
6
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diff changeset
161 t = strlen(llist[i] -> name) + 6 + strlen(llist[i] -> arg);
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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162 if (llist[i] -> flags & lw_cmdline_opt_optional)
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
163 t += 2;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
164 if (col + t > LLEN)
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
165 {
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
166 printf("\n ");
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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167 col = 7;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
168 }
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
169 printf(" [--%s%s=%s%s]",
4
a4812d57ed13 Started implementing command line parsing in lwlib
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diff changeset
170 llist[i] -> name,
a4812d57ed13 Started implementing command line parsing in lwlib
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171 (llist[i] -> flags & lw_cmdline_opt_optional) ? "[" : "",
a4812d57ed13 Started implementing command line parsing in lwlib
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diff changeset
172 llist[i] -> arg,
a4812d57ed13 Started implementing command line parsing in lwlib
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173 (llist[i] -> flags & lw_cmdline_opt_optional) ? "]" : "");
6
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
174 col += t;
4
a4812d57ed13 Started implementing command line parsing in lwlib
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diff changeset
175 }
a4812d57ed13 Started implementing command line parsing in lwlib
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diff changeset
176 else
a4812d57ed13 Started implementing command line parsing in lwlib
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diff changeset
177 {
6
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diff changeset
178 t = strlen(llist[i] -> name) + 5;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
179 if (col + t > LLEN)
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
180 {
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
181 printf("\n ");
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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182 col = 7;
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183 }
4
a4812d57ed13 Started implementing command line parsing in lwlib
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184 printf(" [--%s]", llist[i] -> name);
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185 col += t;
4
a4812d57ed13 Started implementing command line parsing in lwlib
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186 }
a4812d57ed13 Started implementing command line parsing in lwlib
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187 }
a4812d57ed13 Started implementing command line parsing in lwlib
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188
a4812d57ed13 Started implementing command line parsing in lwlib
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189 /* print "non option" text */
a4812d57ed13 Started implementing command line parsing in lwlib
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190 if (parser -> args_doc)
a4812d57ed13 Started implementing command line parsing in lwlib
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diff changeset
191 {
6
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diff changeset
192 if (col + strlen(parser -> args_doc) + 1 > LLEN)
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
193 {
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
194 printf("\n ");
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diff changeset
195 }
4
a4812d57ed13 Started implementing command line parsing in lwlib
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196 printf(" %s", parser -> args_doc);
a4812d57ed13 Started implementing command line parsing in lwlib
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197 }
a4812d57ed13 Started implementing command line parsing in lwlib
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198 printf("\n");
a4812d57ed13 Started implementing command line parsing in lwlib
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199
a4812d57ed13 Started implementing command line parsing in lwlib
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diff changeset
200 /* clean up scratch lists */
a4812d57ed13 Started implementing command line parsing in lwlib
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201 lw_free(slist);
a4812d57ed13 Started implementing command line parsing in lwlib
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diff changeset
202 lw_free(llist);
a4812d57ed13 Started implementing command line parsing in lwlib
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diff changeset
203 }
a4812d57ed13 Started implementing command line parsing in lwlib
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204
5
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
205 static void lw_cmdline_help(struct lw_cmdline_parser *parser, char *name)
4
a4812d57ed13 Started implementing command line parsing in lwlib
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206 {
5
0e01d1343c02 Added basic --help routine to lw_cmdline
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207 struct lw_cmdline_options **llist;
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diff changeset
208 int nopt;
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
209 int i;
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
210 int t;
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
211 char *tstr;
6
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
212 int col = 0;
5
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
213
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
214 tstr = parser -> doc;
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
215 for (nopt = 0; parser -> options[nopt].name; nopt++)
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
216 /* do nothing */ ;
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
217
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
218 llist = lw_alloc(sizeof(struct lw_cmdline_options *) * (nopt + 3));
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
219
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
220 for (i = 0; i < nopt; i++)
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
221 {
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
222 llist[i] = &(parser -> options[i]);
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
223 }
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
224
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
225 /* now sort the list */
6
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
226 qsort(llist, nopt, sizeof(struct lw_cmdline_options *), cmpr);
5
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
227
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
228 /* now append the automatic options */
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
229 llist[nopt] = &(builtin[0]);
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
230 llist[nopt + 1] = &(builtin[1]);
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
231 llist[nopt + 2] = &(builtin[2]);
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
232
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
233 /* print brief usage */
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
234 printf("Usage: %s [OPTION...] %s\n", name, parser -> args_doc ? parser -> args_doc : "");
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
235 if (tstr)
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
236 {
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
237 while (*tstr && *tstr != '\v')
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
238 fputc(*tstr++, stdout);
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
239 if (*tstr)
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
240 tstr++;
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
241 }
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
242 fputc('\n', stdout);
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
243 fputc('\n', stdout);
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
244
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
245 /* display options - do it the naïve way for now */
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
246 for (i = 0; i < (nopt + 3); i++)
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
247 {
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
248 if (llist[i] -> key > 0x20 && llist[i] -> key < 0x7F)
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
249 {
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
250 printf(" -%c, ", llist[i] -> key);
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
251 }
0e01d1343c02 Added basic --help routine to lw_cmdline
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parents: 4
diff changeset
252 else
0e01d1343c02 Added basic --help routine to lw_cmdline
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parents: 4
diff changeset
253 {
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
254 printf(" ");
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
255 }
6
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
256 col = 8 + strlen(llist[i] -> name);
5
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
257
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
258 printf("--%s", llist[i] -> name);
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
259 if (llist[i] -> arg)
0e01d1343c02 Added basic --help routine to lw_cmdline
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parents: 4
diff changeset
260 {
0e01d1343c02 Added basic --help routine to lw_cmdline
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parents: 4
diff changeset
261 if (llist[i] -> flags & lw_cmdline_opt_optional)
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
262 {
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
263 printf("[=%s]", llist[i] -> arg);
6
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
264 col += 3 + strlen(llist[i] -> arg);
5
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
265 }
0e01d1343c02 Added basic --help routine to lw_cmdline
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parents: 4
diff changeset
266 else
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
267 {
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
268 printf("=%s", llist[i] -> arg);
6
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
269 col += 1 + strlen(llist[i] -> arg);
5
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
270 }
0e01d1343c02 Added basic --help routine to lw_cmdline
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parents: 4
diff changeset
271 }
0e01d1343c02 Added basic --help routine to lw_cmdline
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parents: 4
diff changeset
272 if (llist[i] -> doc)
0e01d1343c02 Added basic --help routine to lw_cmdline
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diff changeset
273 {
6
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
274 char *s = llist[i] -> doc;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
275 char *s2;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
276
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
277 while (*s && isspace(*s))
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
278 s++;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
279
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
280 if (col > DOCCOL)
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
281 {
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
282 fputc('\n', stdout);
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
283 col = 0;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
284 }
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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parents: 5
diff changeset
285 while (*s)
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
286 {
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
287 while (col < (DOCCOL - 1))
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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parents: 5
diff changeset
288 {
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
289 fputc(' ', stdout);
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
290 col++;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
291 }
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
292 for (s2 = s; *s2 && !isspace(*s2); s2++)
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
293 /* do nothing */ ;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
294 if ((col + (s2 - s) + 1) > LLEN && col >= DOCCOL)
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
295 {
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
296 /* next line */
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
297 fputc('\n', stdout);
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
298 col = 0;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
299 continue;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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diff changeset
300 }
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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parents: 5
diff changeset
301 col++;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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parents: 5
diff changeset
302 fputc(' ', stdout);
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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parents: 5
diff changeset
303 while (s != s2)
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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parents: 5
diff changeset
304 {
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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parents: 5
diff changeset
305 fputc(*s, stdout);
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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parents: 5
diff changeset
306 col++;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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parents: 5
diff changeset
307 s++;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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parents: 5
diff changeset
308 }
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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parents: 5
diff changeset
309 while (*s && isspace(*s))
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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parents: 5
diff changeset
310 s++;
1e5e8ec406fb Various output cleanups for --help and --usage in lw_cmdline
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parents: 5
diff changeset
311 }
5
0e01d1343c02 Added basic --help routine to lw_cmdline
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parents: 4
diff changeset
312 }
0e01d1343c02 Added basic --help routine to lw_cmdline
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parents: 4
diff changeset
313 fputc('\n', stdout);
0e01d1343c02 Added basic --help routine to lw_cmdline
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parents: 4
diff changeset
314 }
0e01d1343c02 Added basic --help routine to lw_cmdline
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parents: 4
diff changeset
315
0e01d1343c02 Added basic --help routine to lw_cmdline
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parents: 4
diff changeset
316 printf("\nMandatory or optional arguments to long options are also mandatory or optional\nfor any corresponding short options.\n");
0e01d1343c02 Added basic --help routine to lw_cmdline
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parents: 4
diff changeset
317
0e01d1343c02 Added basic --help routine to lw_cmdline
lost@l-w.ca
parents: 4
diff changeset
318 if (*tstr)
0e01d1343c02 Added basic --help routine to lw_cmdline
lost@l-w.ca
parents: 4
diff changeset
319 {
0e01d1343c02 Added basic --help routine to lw_cmdline
lost@l-w.ca
parents: 4
diff changeset
320 printf("\n%s\n", tstr);
0e01d1343c02 Added basic --help routine to lw_cmdline
lost@l-w.ca
parents: 4
diff changeset
321 }
0e01d1343c02 Added basic --help routine to lw_cmdline
lost@l-w.ca
parents: 4
diff changeset
322
0e01d1343c02 Added basic --help routine to lw_cmdline
lost@l-w.ca
parents: 4
diff changeset
323 /* clean up scratch lists */
0e01d1343c02 Added basic --help routine to lw_cmdline
lost@l-w.ca
parents: 4
diff changeset
324 lw_free(llist);
4
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
325 }
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
326
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
327 int lw_cmdline_parse(struct lw_cmdline_parser *parser, int argc, char **argv, unsigned flags, int *arg_index, void *input)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
328 {
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
329 int i, j, r;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
330 int firstarg;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
331 int nextarg;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
332 char *tstr;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
333 int cch;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
334
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
335 /* first, permute the argv array so that all option arguments are at the start */
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
336 for (i = 1, firstarg = 1; i < argc; i++)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
337 {
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
338 if (argv[i][0] == '-' && argv[i][1])
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
339 {
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
340 /* have an option arg */
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
341 if (firstarg == i)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
342 {
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
343 firstarg++;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
344 continue;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
345 }
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
346 tstr = argv[i];
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
347 for (j = i; j > firstarg; j--)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
348 {
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
349 argv[j] = argv[j - 1];
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
350 }
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
351 argv[firstarg] = tstr;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
352 firstarg++;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
353 if (argv[firstarg - 1][1] == '-' && argv[firstarg - 1][2] == 0)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
354 break;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
355 }
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
356 }
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
357
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
358 /* now start parsing options */
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
359 nextarg = firstarg;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
360 i = 1;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
361 cch = 0;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
362 while (i < firstarg)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
363 {
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
364 if (cch > 0 && argv[i][cch] == 0)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
365 {
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
366 i++;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
367 cch = 0;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
368 continue;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
369 }
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
370
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
371 if (cch > 0)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
372 goto shortopt;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
373
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
374 /* skip the "--" option */
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
375 if (argv[i][1] == '-' && argv[i][2] == 0)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
376 break;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
377
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
378 if (argv[i][1] == '-')
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
379 {
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
380 goto longopt;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
381 }
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
382
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
383 cch = 1;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
384 shortopt:
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
385 /* handle a short option here */
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
386
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
387 /* automatic options */
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
388 if (argv[i][cch] == '?')
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
389 goto do_help;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
390 if (argv[i][cch] == 'V')
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
391 goto do_version;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
392 /* look up key */
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
393 for (j = 0; parser -> options[j].name; j++)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
394 if (parser -> options[j].key == argv[i][cch])
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
395 break;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
396 cch++;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
397 tstr = argv[i] + cch;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
398 if (!*tstr)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
399 {
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
400 if (nextarg < argc)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
401 tstr = argv[nextarg];
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
402 else
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
403 tstr = NULL;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
404 }
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
405 goto common;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
406
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
407 longopt:
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
408 if (strcmp(argv[i], "--help") == 0)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
409 goto do_help;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
410 if (strcmp(argv[i], "--usage") == 0)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
411 goto do_usage;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
412 if (strcmp(argv[i], "--version") == 0)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
413 goto do_version;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
414 /* look up name */
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
415
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
416 for (j = 2; argv[i][j] && argv[i][j] != '='; j++)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
417 /* do nothing */ ;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
418 tstr = lw_alloc(j - 1);
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
419 strncpy(tstr, argv[i] + 2, j - 2);
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
420 tstr[j - 1] = 0;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
421 if (argv[i][j] == '=')
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
422 j++;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
423 cch = j;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
424
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
425 for (j = 0; parser -> options[j].name; j++)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
426 {
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
427 if (strcmp(parser -> options[j].name, tstr) == 0)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
428 break;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
429 }
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
430 lw_free(tstr);
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
431 tstr = argv[i] + cch;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
432 cch = 0;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
433
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
434 common:
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
435 /* j will be the offset into the option table when we get here */
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
436 /* cch will be zero and tstr will point to the arg if it's a long option */
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
437 /* cch will be > 0 and tstr points to the theoretical option, either within */
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
438 /* this string or "nextarg" */
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
439 if (parser -> options[j].name == NULL)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
440 {
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
441 fprintf(stderr, "Unknown option. See %s --usage.\n", argv[0]);
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
442 exit(1);
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
443 }
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
444 if (parser -> options[j].arg)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
445 {
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
446 if (tstr && cch && argv[i][cch] == 0)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
447 nextarg++;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
448
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
449 if (!*tstr)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
450 tstr = NULL;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
451
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
452 if (!tstr && (parser -> options[j].flags & lw_cmdline_opt_optional) == 0)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
453 {
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
454 fprintf(stderr, "Option %s requires argument.\n", parser -> options[j].name);
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
455 }
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
456 }
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
457 r = (*(parser -> parser))(parser -> options[j].key, tstr, input);
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
458 if (r != 0)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
459 return r;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
460 }
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
461 /* handle non-option args */
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
462 if (arg_index)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
463 *arg_index = nextarg;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
464 for (i = nextarg; i < argc; i++)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
465 {
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
466 r = (*(parser -> parser))(lw_cmdline_key_arg, argv[i], input);
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
467 if (r != 0)
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
468 return r;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
469 }
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
470 r = (*(parser -> parser))(lw_cmdline_key_end, NULL, input);
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
471 return r;
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
472
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
473 do_help:
5
0e01d1343c02 Added basic --help routine to lw_cmdline
lost@l-w.ca
parents: 4
diff changeset
474 lw_cmdline_help(parser, argv[0]);
4
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
475 exit(0);
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
476
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
477 do_version:
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
478 printf("%s\n", parser -> program_version);
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
479 exit(0);
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
480
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
481 do_usage:
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
482 lw_cmdline_usage(parser, argv[0]);
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
483 exit(0);
a4812d57ed13 Started implementing command line parsing in lwlib
lost@l-w.ca
parents:
diff changeset
484 }