1 | /* $Id: utf8-win.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - UTF8 helpers.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2023 Oracle and/or its affiliates.
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8 | *
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9 | * This file is part of VirtualBox base platform packages, as
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10 | * available from https://www.virtualbox.org.
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11 | *
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12 | * This program is free software; you can redistribute it and/or
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13 | * modify it under the terms of the GNU General Public License
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14 | * as published by the Free Software Foundation, in version 3 of the
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15 | * License.
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16 | *
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17 | * This program is distributed in the hope that it will be useful, but
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18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 | * General Public License for more details.
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21 | *
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22 | * You should have received a copy of the GNU General Public License
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23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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24 | *
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25 | * The contents of this file may alternatively be used under the terms
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26 | * of the Common Development and Distribution License Version 1.0
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27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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28 | * in the VirtualBox distribution, in which case the provisions of the
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29 | * CDDL are applicable instead of those of the GPL.
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30 | *
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31 | * You may elect to license modified versions of this file under the
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32 | * terms and conditions of either the GPL or the CDDL or both.
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33 | *
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34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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35 | */
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36 |
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37 |
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38 | /*********************************************************************************************************************************
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39 | * Header Files *
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40 | *********************************************************************************************************************************/
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41 | #define LOG_GROUP RTLOGGROUP_UTF8
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42 | #include <iprt/win/windows.h>
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43 |
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44 | #include <iprt/string.h>
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45 | #include <iprt/alloc.h>
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46 | #include <iprt/assert.h>
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47 | #include <iprt/err.h>
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48 | #include <iprt/utf16.h>
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49 |
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50 |
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51 |
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52 | RTR3DECL(int) RTStrUtf8ToCurrentCPTag(char **ppszString, const char *pszString, const char *pszTag)
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53 | {
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54 | return RTStrUtf8ToCurrentCPExTag(ppszString, pszString, RTSTR_MAX, pszTag);
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55 | }
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56 |
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57 |
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58 | RTR3DECL(int) RTStrUtf8ToCurrentCPExTag(char **ppszString, const char *pszString, size_t cchString, const char *pszTag)
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59 | {
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60 | Assert(ppszString);
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61 | Assert(pszString);
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62 | *ppszString = NULL;
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63 |
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64 | /*
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65 | * If the ANSI codepage (CP_ACP) is UTF-8, no translation is needed.
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66 | * Same goes for empty strings.
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67 | */
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68 | if ( cchString == 0
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69 | || *pszString == '\0')
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70 | return RTStrDupNExTag(ppszString, pszString, 0, pszTag);
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71 | if (GetACP() == CP_UTF8)
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72 | {
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73 | int rc = RTStrValidateEncodingEx(pszString, cchString, 0);
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74 | AssertRCReturn(rc, rc);
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75 | return RTStrDupNExTag(ppszString, pszString, cchString, pszTag);
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76 | }
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77 |
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78 | /*
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79 | * Convert to wide char first.
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80 | */
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81 | PRTUTF16 pwszString = NULL;
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82 | int rc = RTStrToUtf16Ex(pszString, cchString, &pwszString, 0, NULL);
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83 | if (RT_FAILURE(rc))
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84 | return rc;
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85 |
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86 | /*
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87 | * First calc result string length.
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88 | */
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89 | int cbResult = WideCharToMultiByte(CP_ACP, 0, pwszString, -1, NULL, 0, NULL, NULL);
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90 | if (cbResult > 0)
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91 | {
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92 | /*
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93 | * Alloc space for result buffer.
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94 | */
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95 | LPSTR lpString = (LPSTR)RTMemTmpAllocTag(cbResult, pszTag);
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96 | if (lpString)
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97 | {
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98 | /*
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99 | * Do the translation.
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100 | */
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101 | if (WideCharToMultiByte(CP_ACP, 0, pwszString, -1, lpString, cbResult, NULL, NULL) > 0)
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102 | {
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103 | /* ok */
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104 | *ppszString = lpString;
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105 | RTMemTmpFree(pwszString);
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106 | return VINF_SUCCESS;
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107 | }
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108 |
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109 | /* translation error */
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110 | int iLastErr = GetLastError();
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111 | AssertMsgFailed(("Unicode to ACP translation failed. lasterr=%d\n", iLastErr));
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112 | rc = RTErrConvertFromWin32(iLastErr);
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113 | }
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114 | else
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115 | rc = VERR_NO_TMP_MEMORY;
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116 | RTMemTmpFree(lpString);
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117 | }
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118 | else
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119 | {
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120 | /* translation error */
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121 | int iLastErr = GetLastError();
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122 | AssertMsgFailed(("Unicode to ACP translation failed lasterr=%d\n", iLastErr));
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123 | rc = RTErrConvertFromWin32(iLastErr);
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124 | }
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125 | RTMemTmpFree(pwszString);
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126 | return rc;
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127 | }
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128 |
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129 | static int rtStrCPToUtf8Tag(char **ppszString, const char *pszString, uint32_t uCodePage, const char *pszTag)
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130 | {
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131 | Assert(ppszString);
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132 | Assert(pszString);
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133 | *ppszString = NULL;
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134 |
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135 | /*
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136 | * If the ANSI codepage (CP_ACP) is UTF-8, no translation is needed.
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137 | * Same goes for empty strings.
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138 | */
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139 | if (*pszString == '\0')
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140 | return RTStrDupExTag(ppszString, pszString, pszTag);
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141 | if (GetACP() == CP_UTF8)
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142 | {
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143 | int rc = RTStrValidateEncoding(pszString);
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144 | AssertRCReturn(rc, rc);
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145 | return RTStrDupExTag(ppszString, pszString, pszTag);
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146 | }
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147 |
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148 | /** @todo is there a quicker way? Currently: ACP -> UTF-16 -> UTF-8 */
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149 |
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150 | /*
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151 | * First calc result string length.
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152 | */
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153 | int rc;
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154 | int cwc = MultiByteToWideChar((UINT)uCodePage, 0, pszString, -1, NULL, 0);
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155 | if (cwc > 0)
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156 | {
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157 | /*
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158 | * Alloc space for result buffer.
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159 | */
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160 | PRTUTF16 pwszString = (PRTUTF16)RTMemTmpAlloc(cwc * sizeof(RTUTF16));
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161 | if (pwszString)
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162 | {
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163 | /*
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164 | * Do the translation.
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165 | */
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166 | if (MultiByteToWideChar((UINT)uCodePage, 0, pszString, -1, pwszString, cwc) > 0)
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167 | {
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168 | /*
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169 | * Now we got UTF-16, convert it to UTF-8
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170 | */
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171 | rc = RTUtf16ToUtf8(pwszString, ppszString);
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172 | RTMemTmpFree(pwszString);
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173 | return rc;
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174 | }
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175 | RTMemTmpFree(pwszString);
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176 | /* translation error */
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177 | int iLastErr = GetLastError();
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178 | AssertMsgFailed(("ACP to Unicode translation failed. lasterr=%d\n", iLastErr));
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179 | rc = RTErrConvertFromWin32(iLastErr);
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180 | }
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181 | else
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182 | rc = VERR_NO_TMP_MEMORY;
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183 | }
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184 | else
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185 | {
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186 | /* translation error */
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187 | int iLastErr = GetLastError();
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188 | AssertMsgFailed(("Unicode to ACP translation failed lasterr=%d\n", iLastErr));
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189 | rc = RTErrConvertFromWin32(iLastErr);
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190 | }
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191 | return rc;
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192 | }
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193 |
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194 |
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195 | RTR3DECL(int) RTStrCurrentCPToUtf8Tag(char **ppszString, const char *pszString, const char *pszTag)
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196 | {
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197 | return rtStrCPToUtf8Tag(ppszString, pszString, CP_ACP, pszTag);
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198 | }
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199 |
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200 |
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201 | RTR3DECL(int) RTStrConsoleCPToUtf8Tag(char **ppszString, const char *pszString, const char *pszTag)
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202 | {
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203 | return rtStrCPToUtf8Tag(ppszString, pszString, GetConsoleCP(), pszTag);
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204 | }
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