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annotate packages/language/c/libc/i18n/current/src/locale.cxx @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
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children ac086aa3217e
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1 //========================================================================
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2 //
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3 // locale.cxx
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4 //
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5 // Implementation of ISO C internationalisation (i18n) locales
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6 //
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7 //========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): jlarmour
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35 // Contributors:
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36 // Date: 2000-04-18
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37 // Purpose:
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38 // Description:
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39 // Usage:
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40 //
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41 //####DESCRIPTIONEND####
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42 //
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43 //========================================================================
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44
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45 // CONFIGURATION
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46
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47 #include <pkgconf/libc_i18n.h> // Configuration header
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48
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49 // INCLUDES
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50
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51 #include <cyg/infra/cyg_type.h> // Common type definitions and support
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52 #include <cyg/infra/cyg_trac.h> // Common tracing support
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53 #include <cyg/infra/cyg_ass.h> // Common assertion support
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54 #include <locale.h> // struct lconv
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55 #include <string.h> // several string functions
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56 #include <limits.h> // CHAR_MAX
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57
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58 // TYPE DEFINITIONS
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59
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60 // define a type to encapsulate the locale. In time this will get much
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61 // richer and complete
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62
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63 typedef struct {
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64
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65 const char *name;
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66 struct lconv numdata;
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67
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68 } Cyg_libc_locale_t;
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69
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70
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71 // CONSTANTS
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72
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73 // define the "C" locale
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74 static const Cyg_libc_locale_t
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75 C_locale = { "C",
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76 { ".", "", "", "", "", "", "", "", "", "",
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77 CHAR_MAX, CHAR_MAX, CHAR_MAX, CHAR_MAX, CHAR_MAX, CHAR_MAX,
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78 CHAR_MAX, CHAR_MAX
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79 }
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80 };
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81
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82 // only one locale now, but leave room for expansion
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83 static const Cyg_libc_locale_t *all_locales[] = { &C_locale };
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84
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85 // GLOBALS
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86
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87 // the current locales. Our default is the C locale
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88 static const Cyg_libc_locale_t *current_collate_locale = &C_locale;
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89 static const Cyg_libc_locale_t *current_ctype_locale = &C_locale;
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90 static const Cyg_libc_locale_t *current_monetary_locale = &C_locale;
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91 static const Cyg_libc_locale_t *current_numeric_locale = &C_locale;
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92 static const Cyg_libc_locale_t *current_time_locale = &C_locale;
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93
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94 // FUNCTIONS
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95
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96 static const Cyg_libc_locale_t *
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97 find_locale_data( const char *locale_str, cyg_ucount32 checklen )
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98 {
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99 CYG_REPORT_FUNCNAMETYPE( "find_locale_data", "returning %08x" );
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100 CYG_REPORT_FUNCARG1( "locale_str=%s", locale_str );
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101
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102 const Cyg_libc_locale_t *temp_locale, *curr_locale=NULL;
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103 cyg_ucount32 i;
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104
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105 // is it "" i.e. use the default?
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106 if (*locale_str=='\0') {
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107 curr_locale = &C_locale;
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108 CYG_REPORT_RETVAL( curr_locale );
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109 return curr_locale;
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110 } // if
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111
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112 for (i=0; i<sizeof(all_locales)/sizeof(Cyg_libc_locale_t *); i++ ) {
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113
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114 temp_locale = all_locales[i];
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115
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116 if ( !strncmp(temp_locale->name, locale_str, checklen) )
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117 curr_locale = temp_locale;
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118 } // for
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119
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120 CYG_REPORT_RETVAL( curr_locale );
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121 return curr_locale;
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122 } // find_locale_data()
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123
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124
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125 externC char *
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126 setlocale( int category, const char *locale )
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127 {
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128 CYG_REPORT_FUNCNAMETYPE("setlocale", "returning %08x");
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129 CYG_REPORT_FUNCARG2( "category=%d, locale=%s", category, locale );
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130
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131 if (locale != NULL)
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132 CYG_CHECK_DATA_PTR( locale, "locale pointer is invalid!" );
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133
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134 const char *str;
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135
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136 // special case if locale==NULL, return current locale name
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137 if (locale==NULL) {
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138
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139 CYG_TRACE0( true, "Getting current locale value" );
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140
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141 switch (category) {
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142
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143 case LC_COLLATE:
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144 str = current_collate_locale->name;
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145 break;
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146 case LC_CTYPE:
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147 str = current_ctype_locale->name;
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148 break;
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149 case LC_MONETARY:
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150 str = current_monetary_locale->name;
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151 break;
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152 case LC_NUMERIC:
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153 str = current_numeric_locale->name;
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154 break;
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155 case LC_TIME:
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156 str = current_time_locale->name;
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157 break;
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158 case LC_ALL:
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159
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160 // create static string to give a constructed string back
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161 // to the user. The size is the number of categories other
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162 // than LC_ALL times the maximum name size, and add a constant
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163 // for the delimiting octothorpes
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164 static char my_str[ CYGNUM_LIBC_I18N_MAX_LOCALE_NAME_SIZE*5+10 ];
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165
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166 strcpy( my_str, "#" );
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167 strcat( my_str, current_collate_locale->name );
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168 strcat( my_str, "#" );
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169 strcat( my_str, current_ctype_locale->name );
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170 strcat( my_str, "#" );
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171 strcat( my_str, current_monetary_locale->name );
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172 strcat( my_str, "#" );
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173 strcat( my_str, current_numeric_locale->name );
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174 strcat( my_str, "#" );
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175 strcat( my_str, current_time_locale->name );
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176 strcat( my_str, "#" );
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177
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178 str = &my_str[0];
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179 break;
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180 default:
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181 str=NULL;
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182 CYG_FAIL("setlocale() passed bad category!" );
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183 break;
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184
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185 } // switch
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186
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187 CYG_REPORT_RETVAL( (char *)str);
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188 return (char *)str;
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189 } // if
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190
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191 // we only get here if locale is non-NULL, i.e. we want to set it
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192
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193 const Cyg_libc_locale_t *loc;
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194 cyg_bool default_locale = (*locale=='\0');
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195
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196 CYG_TRACE0( true, "Setting current locale value" );
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197
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198 switch( category ) {
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199 case LC_COLLATE:
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200 loc = find_locale_data( locale, CYGNUM_LIBC_I18N_MAX_LOCALE_NAME_SIZE );
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201 if (loc != NULL) // found it
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202 current_collate_locale=loc;
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203 break;
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204
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205 case LC_CTYPE:
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206 loc = find_locale_data( locale, CYGNUM_LIBC_I18N_MAX_LOCALE_NAME_SIZE );
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207 if (loc != NULL) // found it
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208 current_ctype_locale=loc;
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209 break;
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210
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211 case LC_MONETARY:
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212 loc = find_locale_data( locale, CYGNUM_LIBC_I18N_MAX_LOCALE_NAME_SIZE );
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213 if (loc != NULL) // found it
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214 current_monetary_locale=loc;
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215 break;
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216
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217 case LC_NUMERIC:
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218 loc = find_locale_data( locale, CYGNUM_LIBC_I18N_MAX_LOCALE_NAME_SIZE );
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219 if (loc != NULL) // found it
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220 current_numeric_locale=loc;
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221 break;
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222
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223 case LC_TIME:
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224 loc = find_locale_data( locale, CYGNUM_LIBC_I18N_MAX_LOCALE_NAME_SIZE );
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225 if (loc != NULL) // found it
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226 current_time_locale=loc;
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227 break;
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228
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229 case LC_ALL:
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230 // first try and match it exactly
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231 loc = find_locale_data( locale, CYGNUM_LIBC_I18N_MAX_LOCALE_NAME_SIZE );
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232 if (loc != NULL) { // found it
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233
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234 CYG_TRACE0(true, "Matched locale string exactly");
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235 current_collate_locale = current_ctype_locale = loc;
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236 current_monetary_locale = current_numeric_locale = loc;
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237 current_time_locale = loc;
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238 } // if
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239 else {
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240 CYG_TRACE0( true, "Attempting to parse string previously "
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241 "returned from setlocale()" );
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242 // now try and see if it is a compound string returned
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243 // earlier by setlocale( LC_ALL, NULL );
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244
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245 // Note we don't do much checking here. This could be
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246 // much more rigorous (but at the expense of speed/size?)
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247
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248 const Cyg_libc_locale_t *temp_collate_locale,
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249 *temp_ctype_locale, *temp_monetary_locale,
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250 *temp_numeric_locale, *temp_time_locale;
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251
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252 cyg_ucount32 token_len;
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253
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254 str = &locale[0];
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255 if ( *str=='#' ) {
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256 ++str;
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257 token_len = strcspn( str, "#" );
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258 loc = find_locale_data( str, token_len );
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259
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260 if (loc!=NULL) {
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261 temp_collate_locale=loc;
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262 str += token_len+1;
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263 token_len = strcspn( str, "#" );
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264 loc = find_locale_data( str, token_len );
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265
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266 if (loc!=NULL) {
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267 temp_ctype_locale=loc;
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268 str += token_len+1;
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269 token_len = strcspn( str, "#" );
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270 loc = find_locale_data( str, token_len );
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271
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272 if (loc!=NULL) {
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273 temp_monetary_locale=loc;
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274 str += token_len+1;
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275 token_len = strcspn( str, "#" );
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276 loc = find_locale_data( str, token_len );
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277
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278 if (loc!=NULL) {
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279 temp_numeric_locale=loc;
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280 str += token_len+1;
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281 token_len = strcspn( str, "#" );
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282 loc = find_locale_data( str, token_len );
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283
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284 if (loc!=NULL) {
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285 temp_time_locale=loc;
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286 str += token_len+1;
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287 token_len = strcspn( str, "#" );
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288 loc = find_locale_data( str, token_len );
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289
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290 if (loc!=NULL) {
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291 // if we've got this far and loc still isn't NULL,
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292 // then everything's fine, and we've matched everything
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293
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294 current_collate_locale = temp_collate_locale;
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295 current_ctype_locale = temp_ctype_locale;
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296 current_monetary_locale = temp_monetary_locale;
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297 current_numeric_locale = temp_numeric_locale;
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298 current_time_locale = temp_time_locale;
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299
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300 } // if
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301 } // if
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302 } // if
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303 } // if
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304 } // if
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305 } // if
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306 } // if
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307
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308 } // else
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309 break; // case LC_ALL
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310
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311 default:
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312 CYG_FAIL("setlocale() passed bad category!" );
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313 loc=NULL;
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314 break;
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315 } // switch
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316
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317 if (loc==NULL) {
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318 CYG_REPORT_RETVAL( NULL );
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319 return NULL;
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320 } // if
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321 else if (default_locale==true) {
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322 CYG_REPORT_RETVAL(C_locale.name);
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323 return (char *)C_locale.name;
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324 } // else if
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325 else {
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326 CYG_REPORT_RETVAL(locale);
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327 return (char *)locale;
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328 } // else
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329 } // setlocale()
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330
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331 externC struct lconv *
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332 localeconv( void )
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333 {
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334 CYG_REPORT_FUNCNAMETYPE( "localeconv", "returning %08x" );
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335 CYG_REPORT_FUNCARGVOID();
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336
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337 static struct lconv static_lconv;
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338
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339 static_lconv.decimal_point =
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340 current_numeric_locale->numdata.decimal_point;
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341
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342 static_lconv.thousands_sep =
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343 current_numeric_locale->numdata.thousands_sep;
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344
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345 static_lconv.grouping =
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346 current_numeric_locale->numdata.grouping;
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347
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348 // we cheat a bit, but it should be worth it - a lot of these are
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349 // constants which optimise nicely
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350 cyg_ucount32 size_used;
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351 size_used = (char *)&static_lconv.int_curr_symbol -
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352 (char *)&static_lconv;
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353
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354 memcpy( &(static_lconv.int_curr_symbol),
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355 &(current_monetary_locale->numdata.int_curr_symbol),
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356 sizeof(struct lconv) - size_used );
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357
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358
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359 CYG_REPORT_RETVAL( &static_lconv );
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360 return &static_lconv;
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361 } // localeconv()
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362
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363 // EOF locale.cxx