1 /* |
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2 * Copyright (c) 2004, 2005, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 #include <stdio.h> |
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27 #include <stdlib.h> |
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28 #include <string.h> |
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29 #include <locale.h> |
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30 #include <langinfo.h> |
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31 #include <iconv.h> |
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32 |
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33 #include "utf.h" |
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34 |
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35 /* Global variables */ |
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36 |
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37 /* |
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38 * Initialize all utf processing. |
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39 */ |
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40 struct UtfInst *JNICALL |
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41 utfInitialize(char *options) |
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42 { |
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43 struct UtfInst *ui; |
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44 char *codeset; |
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45 |
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46 ui = (struct UtfInst*)calloc(sizeof(struct UtfInst), 1); |
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47 ui->iconvToPlatform = (void *)-1; |
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48 ui->iconvFromPlatform = (void *)-1; |
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49 |
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50 /* Set the locale from the environment */ |
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51 (void)setlocale(LC_ALL, ""); |
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52 |
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53 /* Get the codeset name */ |
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54 codeset = (char*)nl_langinfo(CODESET); |
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55 if ( codeset == NULL || codeset[0] == 0 ) { |
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56 return ui; |
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57 } |
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58 |
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59 /* If we don't need this, skip it */ |
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60 if (strcmp(codeset, "UTF-8") == 0 || strcmp(codeset, "utf8") == 0 ) { |
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61 return ui; |
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62 } |
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63 |
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64 /* Open conversion descriptors */ |
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65 ui->iconvToPlatform = iconv_open(codeset, "UTF-8"); |
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66 if ( ui->iconvToPlatform == (void *)-1 ) { |
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67 UTF_ERROR("Failed to complete iconv_open() setup"); |
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68 } |
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69 ui->iconvFromPlatform = iconv_open("UTF-8", codeset); |
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70 if ( ui->iconvFromPlatform == (void *)-1 ) { |
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71 UTF_ERROR("Failed to complete iconv_open() setup"); |
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72 } |
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73 return ui; |
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74 } |
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75 |
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76 /* |
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77 * Terminate all utf processing |
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78 */ |
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79 void JNICALL |
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80 utfTerminate(struct UtfInst *ui, char *options) |
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81 { |
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82 if ( ui->iconvFromPlatform != (void *)-1 ) { |
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83 (void)iconv_close(ui->iconvFromPlatform); |
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84 } |
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85 if ( ui->iconvToPlatform != (void *)-1 ) { |
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86 (void)iconv_close(ui->iconvToPlatform); |
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87 } |
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88 ui->iconvToPlatform = (void *)-1; |
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89 ui->iconvFromPlatform = (void *)-1; |
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90 (void)free(ui); |
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91 } |
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92 |
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93 /* |
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94 * Do iconv() conversion. |
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95 * Returns length or -1 if output overflows. |
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96 */ |
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97 static int |
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98 iconvConvert(iconv_t ic, char *bytes, int len, char *output, int outputMaxLen) |
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99 { |
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100 int outputLen = 0; |
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101 |
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102 UTF_ASSERT(bytes); |
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103 UTF_ASSERT(len>=0); |
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104 UTF_ASSERT(output); |
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105 UTF_ASSERT(outputMaxLen>len); |
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106 |
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107 output[0] = 0; |
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108 outputLen = 0; |
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109 |
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110 if ( ic != (iconv_t)(void *)-1 ) { |
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111 int returnValue; |
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112 size_t inLeft; |
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113 size_t outLeft; |
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114 char *inbuf; |
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115 char *outbuf; |
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116 |
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117 inbuf = bytes; |
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118 outbuf = output; |
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119 inLeft = len; |
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120 outLeft = outputMaxLen; |
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121 returnValue = iconv(ic, (void*)&inbuf, &inLeft, &outbuf, &outLeft); |
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122 if ( returnValue >= 0 && inLeft==0 ) { |
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123 outputLen = outputMaxLen-outLeft; |
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124 output[outputLen] = 0; |
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125 return outputLen; |
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126 } |
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127 |
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128 /* Failed to do the conversion */ |
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129 return -1; |
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130 } |
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131 |
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132 /* Just copy bytes */ |
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133 outputLen = len; |
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134 (void)memcpy(output, bytes, len); |
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135 output[len] = 0; |
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136 return outputLen; |
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137 } |
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138 |
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139 /* |
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140 * Convert UTF-8 to Platform Encoding. |
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141 * Returns length or -1 if output overflows. |
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142 */ |
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143 int JNICALL |
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144 utf8ToPlatform(struct UtfInst*ui, jbyte *utf8, int len, char *output, int outputMaxLen) |
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145 { |
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146 /* Negative length is an error */ |
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147 if ( len < 0 ) { |
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148 return -1; |
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149 } |
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150 |
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151 /* Zero length is ok, but we don't need to do much */ |
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152 if ( len == 0 ) { |
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153 output[0] = 0; |
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154 return 0; |
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155 } |
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156 |
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157 return iconvConvert(ui->iconvToPlatform, (char*)utf8, len, output, outputMaxLen); |
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158 } |
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159 |
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160 /* |
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161 * Convert Platform Encoding to UTF-8. |
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162 * Returns length or -1 if output overflows. |
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163 */ |
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164 int JNICALL |
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165 utf8FromPlatform(struct UtfInst*ui, char *str, int len, jbyte *output, int outputMaxLen) |
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166 { |
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167 /* Negative length is an error */ |
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168 if ( len < 0 ) { |
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169 return -1; |
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170 } |
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171 |
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172 /* Zero length is ok, but we don't need to do much */ |
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173 if ( len == 0 ) { |
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174 output[0] = 0; |
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175 return 0; |
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176 } |
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177 |
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178 return iconvConvert(ui->iconvFromPlatform, str, len, (char*)output, outputMaxLen); |
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179 } |
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