String.subproj/CFStringDefaultEncoding.h

   1 /*
   2  * Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*      CFStringDefaultEncoding.h
  24         Copyright (c) 1998-2005, Apple, Inc. All rights reserved.
  25 */
  26
  27 /* This file defines static inline functions used both by CarbonCore & CF. */
  28
  29 #include <CoreFoundation/CFBase.h>
  30 #if defined(__MACH__)
  31 #include <stdlib.h>
  32 #include <fcntl.h>
  33 #include <pwd.h>
  34 #include <sys/param.h>
  35 #include <unistd.h>
  36 #include <string.h>
  37 #include <stdio.h>
  38
  39 #if defined(__cplusplus)
  40 extern "C" {
  41 #endif
  42
  43 #define __kCFUserEncodingEnvVariableName ("__CF_USER_TEXT_ENCODING")
  44 #define __kCFMaxDefaultEncodingFileLength (24)
  45 #define __kCFUserEncodingFileName ("/.CFUserTextEncoding")
  46
  47 /* This function is used to obtain users' default script/region code.
  48    The function first looks at environment variable __kCFUserEncodingEnvVariableName, then, reads the configuration file in user's home directory.
  49 */
  50 CF_INLINE void __CFStringGetUserDefaultEncoding(UInt32 *oScriptValue, UInt32 *oRegionValue) {
  51     char *stringValue;
  52     char buffer[__kCFMaxDefaultEncodingFileLength];
  53     int uid = getuid();
  54
  55     if ((stringValue = getenv(__kCFUserEncodingEnvVariableName)) != NULL) {
  56         if ((uid == strtol(stringValue, &stringValue, 0)) && (':' == *stringValue)) {
  57             ++stringValue;
  58         } else {
  59             stringValue = NULL;
  60         }
  61     }
  62
  63     if ((stringValue == NULL) && ((uid > 0) || getenv("HOME"))) {
  64         struct passwd *passwdp;
  65
  66         if ((passwdp = getpwuid((uid_t)uid))) {
  67             char filename[MAXPATHLEN + 1];
  68             int fd;
  69
  70             strcpy(filename, passwdp->pw_dir);
  71             strcat(filename, __kCFUserEncodingFileName);
  72
  73             if ((fd = open(filename, O_RDONLY, 0)) == -1) {
  74                 // Cannot open the file. Let's fallback to smRoman/verUS
  75                 snprintf(filename, sizeof(filename), "%s=0x%X:0:0", __kCFUserEncodingEnvVariableName, uid);
  76                 putenv(filename);
  77             } else {
  78                 int readSize;
  79
  80                 // cjk: We do not turn on F_NOCACHE on the fd here, because
  81                 // many processes read this file on startup, and caching the
  82                 // is probably a good thing, for the system as a whole.
  83                 readSize = read(fd, buffer, __kCFMaxDefaultEncodingFileLength - 1);
  84                 buffer[(readSize < 0 ? 0 : readSize)] = '\0';
  85                 close(fd);
  86                 stringValue = buffer;
  87
  88                 // Well, we already have a buffer, let's reuse it
  89                 snprintf(filename, sizeof(filename), "%s=0x%X:%s", __kCFUserEncodingEnvVariableName, uid, buffer);
  90                 putenv(filename);
  91             }
  92         }
  93     }
  94
  95     if (stringValue) {
  96         *oScriptValue = strtol(stringValue, &stringValue, 0);
  97         if (*stringValue == ':') {
  98             if (oRegionValue) *oRegionValue = strtol(++stringValue, NULL, 0);
  99             return;
 100         }
 101     }
 102
 103     // Falling back
 104     *oScriptValue = 0; // smRoman
 105     if (oRegionValue) *oRegionValue = 0; // verUS
 106 }
 107
 108 CF_INLINE uint32_t __CFStringGetInstallationRegion() {
 109     char *stringValue = NULL;
 110     char buffer[__kCFMaxDefaultEncodingFileLength];
 111     struct passwd *passwdp;
 112
 113     if ((passwdp = getpwuid((uid_t)0))) {
 114         char filename[MAXPATHLEN + 1];
 115         int fd;
 116
 117         strcpy(filename, passwdp->pw_dir);
 118         strcat(filename, __kCFUserEncodingFileName);
 119
 120         if ((fd = open(filename, O_RDONLY, 0)) != -1) {
 121             int readSize;
 122
 123             // cjk: We do not turn on F_NOCACHE on the fd here, because
 124             // many processes read this file on startup, and caching the
 125             // is probably a good thing, for the system as a whole.
 126             readSize = read(fd, buffer, __kCFMaxDefaultEncodingFileLength - 1);
 127             buffer[(readSize < 0 ? 0 : readSize)] = '\0';
 128             close(fd);
 129             stringValue = buffer;
 130         }
 131     }
 132
 133     if (stringValue) {
 134         (void)strtol(stringValue, &stringValue, 0);
 135         if (*stringValue == ':') return strtol(++stringValue, NULL, 0);
 136     }
 137
 138     return 0; // verUS
 139 }
 140
 141 CF_INLINE void __CFStringGetInstallationEncodingAndRegion(uint32_t *encoding, uint32_t *region) {
 142     char *stringValue = NULL;
 143     char buffer[__kCFMaxDefaultEncodingFileLength];
 144     struct passwd *passwdp;
 145
 146     *encoding = 0; *region = 0;
 147
 148     if ((passwdp = getpwuid((uid_t)0))) {
 149         char filename[MAXPATHLEN + 1];
 150         int fd;
 151
 152         strcpy(filename, passwdp->pw_dir);
 153         strcat(filename, __kCFUserEncodingFileName);
 154
 155         if ((fd = open(filename, O_RDONLY, 0)) != -1) {
 156             int readSize;
 157
 158             // cjk: We do not turn on F_NOCACHE on the fd here, because
 159             // many processes read this file on startup, and caching the
 160             // is probably a good thing, for the system as a whole.
 161             readSize = read(fd, buffer, __kCFMaxDefaultEncodingFileLength - 1);
 162             buffer[(readSize < 0 ? 0 : readSize)] = '\0';
 163             close(fd);
 164             stringValue = buffer;
 165         }
 166     }
 167
 168     if (stringValue) {
 169         *encoding = strtol(stringValue, &stringValue, 0);
 170         if (*stringValue == ':') *region = strtol(++stringValue, NULL, 0);
 171     }
 172 }
 173
 174 CF_INLINE void __CFStringSaveUserDefaultEncoding(UInt32 iScriptValue, UInt32 iRegionValue) {
 175     struct passwd *passwdp;
 176
 177     if ((passwdp = getpwuid(getuid()))) {
 178         char filename[MAXPATHLEN + 1];
 179         int fd;
 180
 181         strcpy(filename, passwdp->pw_dir);
 182         strcat(filename, __kCFUserEncodingFileName);
 183
 184         // In case, file exists
 185         (void)unlink(filename);
 186
 187         if ((fd = open(filename, O_WRONLY|O_CREAT, 0400)) != -1) {
 188             char buffer[__kCFMaxDefaultEncodingFileLength];
 189             unsigned int writeSize;
 190
 191             writeSize = snprintf(buffer, __kCFMaxDefaultEncodingFileLength, "0x%X:0x%X", (unsigned int)iScriptValue, (unsigned int)iRegionValue);
 192             (void)write(fd, buffer, (writeSize > __kCFMaxDefaultEncodingFileLength ? __kCFMaxDefaultEncodingFileLength : writeSize));
 193             close(fd);
 194         }
 195     }
 196 }
 197
 198 #if defined(__cplusplus)
 199 }
 200 #endif
 201
 202 #endif /* __MACH__ */