| 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 | /* Misc functions for conversion of Unicode and UTF-8 and platform encoding */
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| 27 |
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| 28 | #include <stdio.h>
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| 29 | #include <stddef.h>
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| 30 | #include <stdlib.h>
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| 31 | #include <stdarg.h>
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| 32 | #include <string.h>
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| 33 | #include <ctype.h>
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| 34 |
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| 35 | #include "jni.h"
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| 36 |
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| 37 | #include "utf.h"
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| 38 |
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| 39 | /*
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| 40 | * Error handler
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| 41 | */
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| 42 | void
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| 43 | utfError(char *file, int line, char *message)
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| 44 | {
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| 45 | (void)fprintf(stderr, "UTF ERROR [\"%s\":%d]: %s\n", file, line, message);
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| 46 | abort();
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| 47 | }
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| 48 |
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| 49 | /*
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| 50 | * Convert UTF-8 to UTF-16
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| 51 | * Returns length or -1 if output overflows.
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| 52 | */
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| 53 | int JNICALL
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| 54 | utf8ToUtf16(struct UtfInst *ui, jbyte *utf8, int len, unsigned short *output, int outputMaxLen)
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| 55 | {
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| 56 | int outputLen;
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| 57 | int i;
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| 58 |
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| 59 | UTF_ASSERT(utf8);
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| 60 | UTF_ASSERT(len>=0);
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| 61 | UTF_ASSERT(output);
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| 62 | UTF_ASSERT(outputMaxLen>0);
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| 63 |
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| 64 | i = 0;
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| 65 | outputLen = 0;
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| 66 | while ( i<len ) {
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| 67 | unsigned code, x, y, z;
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| 68 |
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| 69 | if ( outputLen >= outputMaxLen ) {
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| 70 | return -1;
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| 71 | }
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| 72 | x = (unsigned char)utf8[i++];
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| 73 | code = x;
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| 74 | if ( (x & 0xE0)==0xE0 ) {
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| 75 | y = (unsigned char)utf8[i++];
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| 76 | z = (unsigned char)utf8[i++];
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| 77 | code = ((x & 0xF)<<12) + ((y & 0x3F)<<6) + (z & 0x3F);
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| 78 | } else if ( (x & 0xC0)==0xC0 ) {
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| 79 | y = (unsigned char)utf8[i++];
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| 80 | code = ((x & 0x1F)<<6) + (y & 0x3F);
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| 81 | }
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| 82 | output[outputLen++] = code;
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| 83 | }
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| 84 | return outputLen;
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| 85 | }
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| 86 |
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| 87 | /*
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| 88 | * Convert UTF-16 to UTF-8 Modified
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| 89 | * Returns length or -1 if output overflows.
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| 90 | */
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| 91 | int JNICALL
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| 92 | utf16ToUtf8m(struct UtfInst *ui, unsigned short *utf16, int len, jbyte *output, int outputMaxLen)
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| 93 | {
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| 94 | int i;
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| 95 | int outputLen;
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| 96 |
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| 97 | UTF_ASSERT(utf16);
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| 98 | UTF_ASSERT(len>=0);
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| 99 | UTF_ASSERT(output);
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| 100 | UTF_ASSERT(outputMaxLen>0);
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| 101 |
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| 102 | outputLen = 0;
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| 103 | for (i = 0; i < len; i++) {
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| 104 | unsigned code;
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| 105 |
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| 106 | code = utf16[i];
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| 107 | if ( code >= 0x0001 && code <= 0x007F ) {
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| 108 | output[outputLen++] = code;
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| 109 | } else if ( code == 0 || ( code >= 0x0080 && code <= 0x07FF ) ) {
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| 110 | output[outputLen++] = ((code>>6) & 0x1F) | 0xC0;
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| 111 | output[outputLen++] = (code & 0x3F) | 0x80;
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| 112 | } else if ( code >= 0x0800 && code <= 0xFFFF ) {
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| 113 | output[outputLen++] = ((code>>12) & 0x0F) | 0xE0;
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| 114 | output[outputLen++] = ((code>>6) & 0x3F) | 0x80;
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| 115 | output[outputLen++] = (code & 0x3F) | 0x80;
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| 116 | }
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| 117 | if ( outputLen > outputMaxLen ) {
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| 118 | return -1;
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| 119 | }
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| 120 | }
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| 121 | output[outputLen] = 0;
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| 122 | return outputLen;
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| 123 | }
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| 124 |
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| 125 | int JNICALL
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| 126 | utf16ToUtf8s(struct UtfInst *ui, unsigned short *utf16, int len, jbyte *output, int outputMaxLen)
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| 127 | {
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| 128 | return -1; /* FIXUP */
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| 129 | }
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| 130 |
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| 131 | /* Determine length of this Standard UTF-8 in Modified UTF-8.
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| 132 | * Validation is done of the basic UTF encoding rules, returns
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| 133 | * length (no change) when errors are detected in the UTF encoding.
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| 134 | *
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| 135 | * Note: Accepts Modified UTF-8 also, no verification on the
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| 136 | * correctness of Standard UTF-8 is done. e,g, 0xC080 input is ok.
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| 137 | */
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| 138 | int JNICALL
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| 139 | utf8sToUtf8mLength(struct UtfInst *ui, jbyte *string, int length)
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| 140 | {
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| 141 | int newLength;
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| 142 | int i;
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| 143 |
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| 144 | newLength = 0;
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| 145 | for ( i = 0 ; i < length ; i++ ) {
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| 146 | unsigned byte;
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| 147 |
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| 148 | byte = (unsigned char)string[i];
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| 149 | if ( (byte & 0x80) == 0 ) { /* 1byte encoding */
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| 150 | newLength++;
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| 151 | if ( byte == 0 ) {
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| 152 | newLength++; /* We gain one byte in length on NULL bytes */
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| 153 | }
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| 154 | } else if ( (byte & 0xE0) == 0xC0 ) { /* 2byte encoding */
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| 155 | /* Check encoding of following bytes */
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| 156 | if ( (i+1) >= length || (string[i+1] & 0xC0) != 0x80 ) {
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| 157 | break; /* Error condition */
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| 158 | }
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| 159 | i++; /* Skip next byte */
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| 160 | newLength += 2;
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| 161 | } else if ( (byte & 0xF0) == 0xE0 ) { /* 3byte encoding */
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| 162 | /* Check encoding of following bytes */
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| 163 | if ( (i+2) >= length || (string[i+1] & 0xC0) != 0x80
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| 164 | || (string[i+2] & 0xC0) != 0x80 ) {
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| 165 | break; /* Error condition */
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| 166 | }
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| 167 | i += 2; /* Skip next two bytes */
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| 168 | newLength += 3;
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| 169 | } else if ( (byte & 0xF8) == 0xF0 ) { /* 4byte encoding */
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| 170 | /* Check encoding of following bytes */
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| 171 | if ( (i+3) >= length || (string[i+1] & 0xC0) != 0x80
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| 172 | || (string[i+2] & 0xC0) != 0x80
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| 173 | || (string[i+3] & 0xC0) != 0x80 ) {
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| 174 | break; /* Error condition */
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| 175 | }
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| 176 | i += 3; /* Skip next 3 bytes */
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| 177 | newLength += 6; /* 4byte encoding turns into 2 3byte ones */
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| 178 | } else {
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| 179 | break; /* Error condition */
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| 180 | }
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| 181 | }
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| 182 | if ( i != length ) {
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| 183 | /* Error in finding new length, return old length so no conversion */
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| 184 | /* FIXUP: ERROR_MESSAGE? */
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| 185 | return length;
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| 186 | }
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| 187 | return newLength;
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| 188 | }
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| 189 |
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| 190 | /* Convert Standard UTF-8 to Modified UTF-8.
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| 191 | * Assumes the UTF-8 encoding was validated by utf8mLength() above.
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| 192 | *
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| 193 | * Note: Accepts Modified UTF-8 also, no verification on the
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| 194 | * correctness of Standard UTF-8 is done. e,g, 0xC080 input is ok.
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| 195 | */
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| 196 | void JNICALL
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| 197 | utf8sToUtf8m(struct UtfInst *ui, jbyte *string, int length, jbyte *newString, int newLength)
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| 198 | {
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| 199 | int i;
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| 200 | int j;
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| 201 |
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| 202 | j = 0;
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| 203 | for ( i = 0 ; i < length ; i++ ) {
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| 204 | unsigned byte1;
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| 205 |
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| 206 | byte1 = (unsigned char)string[i];
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| 207 |
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| 208 | /* NULL bytes and bytes starting with 11110xxx are special */
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| 209 | if ( (byte1 & 0x80) == 0 ) { /* 1byte encoding */
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| 210 | if ( byte1 == 0 ) {
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| 211 | /* Bits out: 11000000 10000000 */
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| 212 | newString[j++] = (jbyte)0xC0;
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| 213 | newString[j++] = (jbyte)0x80;
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| 214 | } else {
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| 215 | /* Single byte */
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| 216 | newString[j++] = byte1;
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| 217 | }
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| 218 | } else if ( (byte1 & 0xE0) == 0xC0 ) { /* 2byte encoding */
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| 219 | newString[j++] = byte1;
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| 220 | newString[j++] = string[++i];
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| 221 | } else if ( (byte1 & 0xF0) == 0xE0 ) { /* 3byte encoding */
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| 222 | newString[j++] = byte1;
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| 223 | newString[j++] = string[++i];
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| 224 | newString[j++] = string[++i];
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| 225 | } else if ( (byte1 & 0xF8) == 0xF0 ) { /* 4byte encoding */
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| 226 | /* Beginning of 4byte encoding, turn into 2 3byte encodings */
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| 227 | unsigned byte2, byte3, byte4, u21;
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| 228 |
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| 229 | /* Bits in: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
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| 230 | byte2 = (unsigned char)string[++i];
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| 231 | byte3 = (unsigned char)string[++i];
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| 232 | byte4 = (unsigned char)string[++i];
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| 233 | /* Reconstruct full 21bit value */
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| 234 | u21 = (byte1 & 0x07) << 18;
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| 235 | u21 += (byte2 & 0x3F) << 12;
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| 236 | u21 += (byte3 & 0x3F) << 6;
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| 237 | u21 += (byte4 & 0x3F);
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| 238 | /* Bits out: 11101101 1010xxxx 10xxxxxx */
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| 239 | newString[j++] = (jbyte)0xED;
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| 240 | newString[j++] = (jbyte)(0xA0 + (((u21 >> 16) - 1) & 0x0F));
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| 241 | newString[j++] = (jbyte)(0x80 + ((u21 >> 10) & 0x3F));
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| 242 | /* Bits out: 11101101 1011xxxx 10xxxxxx */
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| 243 | newString[j++] = (jbyte)0xED;
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| 244 | newString[j++] = (jbyte)(0xB0 + ((u21 >> 6) & 0x0F));
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| 245 | newString[j++] = byte4;
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| 246 | }
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| 247 | }
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| 248 | UTF_ASSERT(i==length);
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| 249 | UTF_ASSERT(j==newLength);
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| 250 | newString[j] = (jbyte)0;
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| 251 | }
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| 252 |
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| 253 | /* Given a Modified UTF-8 string, calculate the Standard UTF-8 length.
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| 254 | * Basic validation of the UTF encoding rules is done, and length is
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| 255 | * returned (no change) when errors are detected.
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| 256 | *
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| 257 | * Note: No validation is made that this is indeed Modified UTF-8 coming in.
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| 258 | *
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| 259 | */
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| 260 | int JNICALL
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| 261 | utf8mToUtf8sLength(struct UtfInst *ui, jbyte *string, int length)
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| 262 | {
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| 263 | int newLength;
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| 264 | int i;
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| 265 |
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| 266 | newLength = 0;
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| 267 | for ( i = 0 ; i < length ; i++ ) {
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| 268 | unsigned byte1, byte2, byte3, byte4, byte5, byte6;
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| 269 |
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| 270 | byte1 = (unsigned char)string[i];
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| 271 | if ( (byte1 & 0x80) == 0 ) { /* 1byte encoding */
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| 272 | newLength++;
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| 273 | } else if ( (byte1 & 0xE0) == 0xC0 ) { /* 2byte encoding */
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| 274 | /* Check encoding of following bytes */
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| 275 | if ( (i+1) >= length || (string[i+1] & 0xC0) != 0x80 ) {
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| 276 | break; /* Error condition */
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| 277 | }
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| 278 | byte2 = (unsigned char)string[++i];
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| 279 | if ( byte1 != 0xC0 || byte2 != 0x80 ) {
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| 280 | newLength += 2; /* Normal 2byte encoding, not 0xC080 */
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| 281 | } else {
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| 282 | newLength++; /* We will turn 0xC080 into 0 */
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| 283 | }
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| 284 | } else if ( (byte1 & 0xF0) == 0xE0 ) { /* 3byte encoding */
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| 285 | /* Check encoding of following bytes */
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| 286 | if ( (i+2) >= length || (string[i+1] & 0xC0) != 0x80
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| 287 | || (string[i+2] & 0xC0) != 0x80 ) {
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| 288 | break; /* Error condition */
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| 289 | }
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| 290 | byte2 = (unsigned char)string[++i];
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| 291 | byte3 = (unsigned char)string[++i];
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| 292 | newLength += 3;
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| 293 | /* Possible process a second 3byte encoding */
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| 294 | if ( (i+3) < length && byte1 == 0xED && (byte2 & 0xF0) == 0xA0 ) {
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| 295 | /* See if this is a pair of 3byte encodings */
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| 296 | byte4 = (unsigned char)string[i+1];
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| 297 | byte5 = (unsigned char)string[i+2];
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| 298 | byte6 = (unsigned char)string[i+3];
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| 299 | if ( byte4 == 0xED && (byte5 & 0xF0) == 0xB0 ) {
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| 300 | /* Check encoding of 3rd byte */
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| 301 | if ( (byte6 & 0xC0) != 0x80 ) {
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| 302 | break; /* Error condition */
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| 303 | }
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| 304 | newLength++; /* New string will have 4byte encoding */
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| 305 | i += 3; /* Skip next 3 bytes */
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| 306 | }
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| 307 | }
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| 308 | } else {
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| 309 | break; /* Error condition */
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| 310 | }
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| 311 | }
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| 312 | if ( i != length ) {
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| 313 | /* Error in UTF encoding */
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| 314 | /* FIXUP: ERROR_MESSAGE()? */
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| 315 | return length;
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| 316 | }
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| 317 | return newLength;
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| 318 | }
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| 319 |
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| 320 | /* Convert a Modified UTF-8 string into a Standard UTF-8 string
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| 321 | * It is assumed that this string has been validated in terms of the
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| 322 | * basic UTF encoding rules by utf8Length() above.
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| 323 | *
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| 324 | * Note: No validation is made that this is indeed Modified UTF-8 coming in.
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| 325 | *
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| 326 | */
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| 327 | void JNICALL
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| 328 | utf8mToUtf8s(struct UtfInst *ui, jbyte *string, int length, jbyte *newString, int newLength)
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| 329 | {
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| 330 | int i;
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| 331 | int j;
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| 332 |
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| 333 | j = 0;
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| 334 | for ( i = 0 ; i < length ; i++ ) {
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| 335 | unsigned byte1, byte2, byte3, byte4, byte5, byte6;
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| 336 |
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| 337 | byte1 = (unsigned char)string[i];
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| 338 | if ( (byte1 & 0x80) == 0 ) { /* 1byte encoding */
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| 339 | /* Single byte */
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| 340 | newString[j++] = byte1;
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| 341 | } else if ( (byte1 & 0xE0) == 0xC0 ) { /* 2byte encoding */
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| 342 | byte2 = (unsigned char)string[++i];
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| 343 | if ( byte1 != 0xC0 || byte2 != 0x80 ) {
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| 344 | newString[j++] = byte1;
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| 345 | newString[j++] = byte2;
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| 346 | } else {
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| 347 | newString[j++] = 0;
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| 348 | }
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| 349 | } else if ( (byte1 & 0xF0) == 0xE0 ) { /* 3byte encoding */
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| 350 | byte2 = (unsigned char)string[++i];
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| 351 | byte3 = (unsigned char)string[++i];
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| 352 | if ( i+3 < length && byte1 == 0xED && (byte2 & 0xF0) == 0xA0 ) {
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| 353 | /* See if this is a pair of 3byte encodings */
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| 354 | byte4 = (unsigned char)string[i+1];
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| 355 | byte5 = (unsigned char)string[i+2];
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| 356 | byte6 = (unsigned char)string[i+3];
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| 357 | if ( byte4 == 0xED && (byte5 & 0xF0) == 0xB0 ) {
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| 358 | unsigned u21;
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| 359 |
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| 360 | /* Bits in: 11101101 1010xxxx 10xxxxxx */
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| 361 | /* Bits in: 11101101 1011xxxx 10xxxxxx */
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| 362 | i += 3;
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| 363 |
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| 364 | /* Reconstruct 21 bit code */
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| 365 | u21 = ((byte2 & 0x0F) + 1) << 16;
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| 366 | u21 += (byte3 & 0x3F) << 10;
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| 367 | u21 += (byte5 & 0x0F) << 6;
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| 368 | u21 += (byte6 & 0x3F);
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| 369 |
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| 370 | /* Bits out: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
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| 371 |
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| 372 | /* Convert to 4byte encoding */
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| 373 | newString[j++] = 0xF0 + ((u21 >> 18) & 0x07);
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| 374 | newString[j++] = 0x80 + ((u21 >> 12) & 0x3F);
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| 375 | newString[j++] = 0x80 + ((u21 >> 6) & 0x3F);
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| 376 | newString[j++] = 0x80 + (u21 & 0x3F);
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| 377 | continue;
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| 378 | }
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| 379 | }
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| 380 | /* Normal 3byte encoding */
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| 381 | newString[j++] = byte1;
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| 382 | newString[j++] = byte2;
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| 383 | newString[j++] = byte3;
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| 384 | }
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| 385 | }
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| 386 | UTF_ASSERT(i==length);
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| 387 | UTF_ASSERT(j==newLength);
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| 388 | newString[j] = 0;
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| 389 | }
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| 390 |
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| 391 | /* ================================================================= */
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| 392 |
|
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| 393 | #if 1 /* Test program */
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| 394 |
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| 395 | /*
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| 396 | * Convert any byte array into a printable string.
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| 397 | * Returns length or -1 if output overflows.
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| 398 | */
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| 399 | static int
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| 400 | bytesToPrintable(struct UtfInst *ui, char *bytes, int len, char *output, int outputMaxLen)
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| 401 | {
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|---|
| 402 | int outputLen;
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| 403 | int i;
|
|---|
| 404 |
|
|---|
| 405 | UTF_ASSERT(bytes);
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|---|
| 406 | UTF_ASSERT(len>=0);
|
|---|
| 407 | UTF_ASSERT(output);
|
|---|
| 408 | UTF_ASSERT(outputMaxLen>=0);
|
|---|
| 409 |
|
|---|
| 410 | outputLen = 0;
|
|---|
| 411 | for ( i=0; i<len ; i++ ) {
|
|---|
| 412 | unsigned byte;
|
|---|
| 413 |
|
|---|
| 414 | byte = bytes[i];
|
|---|
| 415 | if ( outputLen >= outputMaxLen ) {
|
|---|
| 416 | return -1;
|
|---|
| 417 | }
|
|---|
| 418 | if ( byte <= 0x7f && isprint(byte) && !iscntrl(byte) ) {
|
|---|
| 419 | output[outputLen++] = (char)byte;
|
|---|
| 420 | } else {
|
|---|
| 421 | (void)sprintf(output+outputLen,"\\x%02x",byte);
|
|---|
| 422 | outputLen += 4;
|
|---|
| 423 | }
|
|---|
| 424 | }
|
|---|
| 425 | output[outputLen] = 0;
|
|---|
| 426 | return outputLen;
|
|---|
| 427 | }
|
|---|
| 428 |
|
|---|
| 429 | static void
|
|---|
| 430 | test(void)
|
|---|
| 431 | {
|
|---|
| 432 | static char *strings[] = {
|
|---|
| 433 | "characters",
|
|---|
| 434 | "abcdefghijklmnopqrstuvwxyz",
|
|---|
| 435 | "0123456789",
|
|---|
| 436 | "!@#$%^&*()_+=-{}[]:;",
|
|---|
| 437 | NULL };
|
|---|
| 438 | int i;
|
|---|
| 439 | struct UtfInst *ui;
|
|---|
| 440 |
|
|---|
| 441 | ui = utfInitialize(NULL);
|
|---|
| 442 |
|
|---|
| 443 | i = 0;
|
|---|
| 444 | while ( strings[i] != NULL ) {
|
|---|
| 445 | char *str;
|
|---|
| 446 | #define MAX 1024
|
|---|
| 447 | char buf0[MAX];
|
|---|
| 448 | char buf1[MAX];
|
|---|
| 449 | char buf2[MAX];
|
|---|
| 450 | unsigned short buf3[MAX];
|
|---|
| 451 | int len1;
|
|---|
| 452 | int len2;
|
|---|
| 453 | int len3;
|
|---|
| 454 |
|
|---|
| 455 | str = strings[i];
|
|---|
| 456 |
|
|---|
| 457 | (void)bytesToPrintable(ui, str, (int)strlen(str), buf0, 1024);
|
|---|
| 458 |
|
|---|
| 459 | len1 = utf8FromPlatform(ui, str, (int)strlen(str), (jbyte*)buf1, 1024);
|
|---|
| 460 |
|
|---|
| 461 | UTF_ASSERT(len1==(int)strlen(str));
|
|---|
| 462 |
|
|---|
| 463 | len3 = utf8ToUtf16(ui, (jbyte*)buf1, len1, (jchar*)buf3, 1024);
|
|---|
| 464 |
|
|---|
| 465 | UTF_ASSERT(len3==len1);
|
|---|
| 466 |
|
|---|
| 467 | len1 = utf16ToUtf8m(ui, (jchar*)buf3, len3, (jbyte*)buf1, 1024);
|
|---|
| 468 |
|
|---|
| 469 | UTF_ASSERT(len1==len3);
|
|---|
| 470 | UTF_ASSERT(strcmp(str, buf1) == 0);
|
|---|
| 471 |
|
|---|
| 472 | len2 = utf8ToPlatform(ui, (jbyte*)buf1, len1, buf2, 1024);
|
|---|
| 473 |
|
|---|
| 474 | UTF_ASSERT(len2==len1);
|
|---|
| 475 | UTF_ASSERT(strcmp(str, buf2) == 0);
|
|---|
| 476 |
|
|---|
| 477 | i++;
|
|---|
| 478 | }
|
|---|
| 479 |
|
|---|
| 480 | utfTerminate(ui, NULL);
|
|---|
| 481 |
|
|---|
| 482 | }
|
|---|
| 483 |
|
|---|
| 484 | int
|
|---|
| 485 | main(int argc, char **argv)
|
|---|
| 486 | {
|
|---|
| 487 | test();
|
|---|
| 488 | return 0;
|
|---|
| 489 | }
|
|---|
| 490 |
|
|---|
| 491 | #endif
|
|---|
