Mercurial > trustbridge > nss-cmake-static
annotate nspr/lib/libc/src/plgetopt.c @ 4:b513267f632f tip
Build DBM module
author | Andre Heinecke <andre.heinecke@intevation.de> |
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date | Tue, 05 Aug 2014 18:58:03 +0200 |
parents | 1e5118fa0cb1 |
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rev | line source |
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0
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
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2 /* This Source Code Form is subject to the terms of the Mozilla Public |
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this |
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
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5 |
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6 /* |
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7 ** File: plgetopt.c |
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8 ** Description: utilities to parse argc/argv |
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9 */ |
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10 |
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11 #include "prmem.h" |
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12 #include "prlog.h" |
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13 #include "prerror.h" |
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14 #include "plstr.h" |
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15 #include "plgetopt.h" |
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16 |
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17 #include <string.h> |
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18 |
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19 static char static_Nul = 0; |
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20 |
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21 struct PLOptionInternal |
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22 { |
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23 const char *options; /* client options list specification */ |
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24 PRIntn argc; /* original number of arguments */ |
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25 char **argv; /* vector of pointers to arguments */ |
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26 PRIntn xargc; /* which one we're processing now */ |
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27 const char *xargv; /* where within *argv[xargc] */ |
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28 PRIntn minus; /* do we already have the '-'? */ |
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29 const PLLongOpt *longOpts; /* Caller's array */ |
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30 PRBool endOfOpts; /* have reached a "--" argument */ |
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31 PRIntn optionsLen; /* is strlen(options) */ |
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32 }; |
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33 |
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34 /* |
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35 ** Create the state in which to parse the tokens. |
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36 ** |
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37 ** argc the sum of the number of options and their values |
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38 ** argv the options and their values |
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39 ** options vector of single character options w/ | w/o ': |
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40 */ |
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41 PR_IMPLEMENT(PLOptState*) PL_CreateOptState( |
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42 PRIntn argc, char **argv, const char *options) |
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43 { |
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44 return PL_CreateLongOptState( argc, argv, options, NULL); |
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45 } /* PL_CreateOptState */ |
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46 |
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47 PR_IMPLEMENT(PLOptState*) PL_CreateLongOptState( |
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48 PRIntn argc, char **argv, const char *options, |
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49 const PLLongOpt *longOpts) |
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50 { |
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51 PLOptState *opt = NULL; |
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52 PLOptionInternal *internal; |
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53 |
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54 if (NULL == options) |
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55 { |
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56 PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0); |
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57 return opt; |
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58 } |
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59 |
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60 opt = PR_NEWZAP(PLOptState); |
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61 if (NULL == opt) |
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62 { |
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63 PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0); |
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64 return opt; |
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65 } |
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66 |
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67 internal = PR_NEW(PLOptionInternal); |
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68 if (NULL == internal) |
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69 { |
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70 PR_DELETE(opt); |
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71 PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0); |
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72 return NULL; |
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73 } |
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74 |
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75 opt->option = 0; |
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76 opt->value = NULL; |
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77 opt->internal = internal; |
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78 opt->longOption = 0; |
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79 opt->longOptIndex = -1; |
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80 |
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81 internal->argc = argc; |
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82 internal->argv = argv; |
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83 internal->xargc = 0; |
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84 internal->xargv = &static_Nul; |
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85 internal->minus = 0; |
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86 internal->options = options; |
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87 internal->longOpts = longOpts; |
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88 internal->endOfOpts = PR_FALSE; |
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89 internal->optionsLen = PL_strlen(options); |
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90 |
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91 return opt; |
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92 } /* PL_CreateLongOptState */ |
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93 |
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94 /* |
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95 ** Destroy object created by CreateOptState() |
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96 */ |
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97 PR_IMPLEMENT(void) PL_DestroyOptState(PLOptState *opt) |
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98 { |
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99 PR_DELETE(opt->internal); |
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100 PR_DELETE(opt); |
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101 } /* PL_DestroyOptState */ |
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102 |
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103 PR_IMPLEMENT(PLOptStatus) PL_GetNextOpt(PLOptState *opt) |
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104 { |
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105 PLOptionInternal *internal = opt->internal; |
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106 |
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107 opt->longOption = 0; |
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108 opt->longOptIndex = -1; |
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109 /* |
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110 ** If the current xarg points to nul, advance to the next |
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111 ** element of the argv vector. If the vector index is equal |
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112 ** to argc, we're out of arguments, so return an EOL. |
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113 ** Note whether the first character of the new argument is |
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114 ** a '-' and skip by it if it is. |
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115 */ |
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116 while (0 == *internal->xargv) |
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117 { |
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118 internal->xargc += 1; |
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119 if (internal->xargc >= internal->argc) |
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120 { |
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121 opt->option = 0; |
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122 opt->value = NULL; |
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123 return PL_OPT_EOL; |
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124 } |
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125 internal->xargv = internal->argv[internal->xargc]; |
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126 internal->minus = 0; |
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127 if (!internal->endOfOpts && ('-' == *internal->xargv)) |
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128 { |
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129 internal->minus++; |
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130 internal->xargv++; /* and consume */ |
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131 if ('-' == *internal->xargv && internal->longOpts) |
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132 { |
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133 internal->minus++; |
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134 internal->xargv++; |
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135 if (0 == *internal->xargv) |
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136 { |
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137 internal->endOfOpts = PR_TRUE; |
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138 } |
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139 } |
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140 } |
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141 } |
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142 |
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143 /* |
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144 ** If we already have a '-' or '--' in hand, xargv points to the next |
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145 ** option. See if we can find a match in the list of possible |
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146 ** options supplied. |
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147 */ |
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148 if (internal->minus == 2) |
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149 { |
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150 char * foundEqual = strchr(internal->xargv,'='); |
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151 PRIntn optNameLen = foundEqual ? (foundEqual - internal->xargv) : |
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152 strlen(internal->xargv); |
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153 const PLLongOpt *longOpt = internal->longOpts; |
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154 PLOptStatus result = PL_OPT_BAD; |
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155 |
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156 opt->option = 0; |
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157 opt->value = NULL; |
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158 |
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159 for (; longOpt->longOptName; ++longOpt) |
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160 { |
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161 if (strncmp(longOpt->longOptName, internal->xargv, optNameLen)) |
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162 continue; /* not a possible match */ |
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163 if (strlen(longOpt->longOptName) != optNameLen) |
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164 continue; /* not a match */ |
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165 /* option name match */ |
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166 opt->longOptIndex = longOpt - internal->longOpts; |
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167 opt->longOption = longOpt->longOption; |
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168 /* value is part of the current argv[] element if = was found */ |
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169 /* note: this sets value even for long options that do not |
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170 * require option if specified as --long=value */ |
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171 if (foundEqual) |
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172 { |
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173 opt->value = foundEqual + 1; |
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174 } |
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175 else if (longOpt->valueRequired) |
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176 { |
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177 /* value is the next argv[] element, if any */ |
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178 if (internal->xargc + 1 < internal->argc) |
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179 { |
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180 opt->value = internal->argv[++(internal->xargc)]; |
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181 } |
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182 /* missing value */ |
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183 else |
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184 { |
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185 break; /* return PL_OPT_BAD */ |
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186 } |
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187 } |
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188 result = PL_OPT_OK; |
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189 break; |
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190 } |
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191 internal->xargv = &static_Nul; /* consume this */ |
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192 return result; |
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193 } |
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194 if (internal->minus) |
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195 { |
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196 PRIntn cop; |
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197 PRIntn eoo = internal->optionsLen; |
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198 for (cop = 0; cop < eoo; ++cop) |
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199 { |
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200 if (internal->options[cop] == *internal->xargv) |
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201 { |
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202 opt->option = *internal->xargv++; |
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203 opt->longOption = opt->option & 0xff; |
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204 /* |
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205 ** if options indicates that there's an associated |
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206 ** value, it must be provided, either as part of this |
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207 ** argv[] element or as the next one |
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208 */ |
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209 if (':' == internal->options[cop + 1]) |
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210 { |
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211 /* value is part of the current argv[] element */ |
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212 if (0 != *internal->xargv) |
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213 { |
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214 opt->value = internal->xargv; |
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215 } |
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216 /* value is the next argv[] element, if any */ |
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217 else if (internal->xargc + 1 < internal->argc) |
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218 { |
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219 opt->value = internal->argv[++(internal->xargc)]; |
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220 } |
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221 /* missing value */ |
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222 else |
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223 { |
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224 return PL_OPT_BAD; |
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225 } |
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226 |
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227 internal->xargv = &static_Nul; |
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228 internal->minus = 0; |
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229 } |
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230 else |
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231 opt->value = NULL; |
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232 return PL_OPT_OK; |
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233 } |
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234 } |
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235 internal->xargv += 1; /* consume that option */ |
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236 return PL_OPT_BAD; |
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237 } |
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238 |
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239 /* |
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240 ** No '-', so it must be a standalone value. The option is nul. |
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241 */ |
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242 opt->value = internal->argv[internal->xargc]; |
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243 internal->xargv = &static_Nul; |
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244 opt->option = 0; |
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245 return PL_OPT_OK; |
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246 } /* PL_GetNextOpt */ |
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247 |
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248 /* plgetopt.c */ |