1 /*
2 * Copyright (c) 2004, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 #include <stdio.h>
26 #include <stddef.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <ctype.h>
30 #include <locale.h>
31 #include <langinfo.h>
32 #include <iconv.h>
33
34 /* Routines to convert back and forth between Platform Encoding and UTF-8 */
35
36 /* Use THIS_FILE when it is available. */
37 #ifndef THIS_FILE
38 #define THIS_FILE __FILE__
39 #endif
40
41 /* Error and assert macros */
42 #define UTF_ERROR(m) utfError(THIS_FILE, __LINE__, m)
43 #define UTF_ASSERT(x) ( (x)==0 ? UTF_ERROR("ASSERT ERROR " #x) : (void)0 )
44 #define UTF_DEBUG(x)
45
46 /* Global variables */
47 static iconv_t iconvToPlatform = (iconv_t)-1;
48 static iconv_t iconvFromPlatform = (iconv_t)-1;
49
50 /*
51 * Error handler
52 */
53 static void
54 utfError(char *file, int line, char *message)
55 {
56 (void)fprintf(stderr, "UTF ERROR [\"%s\":%d]: %s\n", file, line, message);
57 abort();
58 }
59
60 /*
61 * Initialize all utf processing.
62 */
63 static void
64 utfInitialize(void)
65 {
66 char *codeset;
67
68 /* Set the locale from the environment */
69 (void)setlocale(LC_ALL, "");
70
71 /* Get the codeset name */
72 codeset = (char*)nl_langinfo(CODESET);
73 if ( codeset == NULL || codeset[0] == 0 ) {
74 UTF_DEBUG(("NO codeset returned by nl_langinfo(CODESET)\n"));
75 return;
76 }
77
78 UTF_DEBUG(("Codeset = %s\n", codeset));
79
80 /* If we don't need this, skip it */
81 if (strcmp(codeset, "UTF-8") == 0 || strcmp(codeset, "utf8") == 0 ) {
82 UTF_DEBUG(("NO iconv() being used because it is not needed\n"));
83 return;
84 }
85
86 /* Open conversion descriptors */
87 iconvToPlatform = iconv_open(codeset, "UTF-8");
88 if ( iconvToPlatform == (iconv_t)-1 ) {
89 UTF_ERROR("Failed to complete iconv_open() setup");
90 }
91 iconvFromPlatform = iconv_open("UTF-8", codeset);
92 if ( iconvFromPlatform == (iconv_t)-1 ) {
93 UTF_ERROR("Failed to complete iconv_open() setup");
94 }
95 }
96
97 /*
98 * Terminate all utf processing
99 */
100 static void
101 utfTerminate(void)
102 {
103 if ( iconvFromPlatform!=(iconv_t)-1 ) {
104 (void)iconv_close(iconvFromPlatform);
105 }
106 if ( iconvToPlatform!=(iconv_t)-1 ) {
107 (void)iconv_close(iconvToPlatform);
108 }
109 iconvToPlatform = (iconv_t)-1;
110 iconvFromPlatform = (iconv_t)-1;
111 }
112
113 /*
114 * Do iconv() conversion.
115 * Returns length or -1 if output overflows.
116 */
117 static int
118 iconvConvert(iconv_t ic, char *bytes, int len, char *output, int outputMaxLen)
119 {
120 int outputLen = 0;
121
122 UTF_ASSERT(bytes);
123 UTF_ASSERT(len>=0);
124 UTF_ASSERT(output);
125 UTF_ASSERT(outputMaxLen>len);
126
127 output[0] = 0;
128 outputLen = 0;
129
130 if ( ic != (iconv_t)-1 ) {
131 int returnValue;
132 size_t inLeft;
133 size_t outLeft;
134 char *inbuf;
135 char *outbuf;
136
137 inbuf = bytes;
138 outbuf = output;
139 inLeft = len;
140 outLeft = outputMaxLen;
141 returnValue = iconv(ic, (void*)&inbuf, &inLeft, &outbuf, &outLeft);
142 if ( returnValue >= 0 && inLeft==0 ) {
143 outputLen = outputMaxLen-outLeft;
144 output[outputLen] = 0;
145 return outputLen;
146 }
147
148 /* Failed to do the conversion */
149 return -1;
150 }
151
152 /* Just copy bytes */
153 outputLen = len;
154 (void)memcpy(output, bytes, len);
155 output[len] = 0;
156 return outputLen;
157 }
158
159 /*
160 * Convert UTF-8 to Platform Encoding.
161 * Returns length or -1 if output overflows.
162 */
163 static int
164 utf8ToPlatform(char *utf8, int len, char *output, int outputMaxLen)
165 {
166 return iconvConvert(iconvToPlatform, utf8, len, output, outputMaxLen);
167 }
168
169 /*
170 * Convert Platform Encoding to UTF-8.
171 * Returns length or -1 if output overflows.
172 */
173 static int
174 platformToUtf8(char *str, int len, char *output, int outputMaxLen)
175 {
176 return iconvConvert(iconvFromPlatform, str, len, output, outputMaxLen);
177 }
178
179 int
180 convertUft8ToPlatformString(char* utf8_str, int utf8_len, char* platform_str, int platform_len) {
181 if (iconvToPlatform == (iconv_t)-1) {
182 utfInitialize();
183 }
184 return utf8ToPlatform(utf8_str, utf8_len, platform_str, platform_len);
185 }