| /* |
| * Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* Misc functions for conversion of Unicode and UTF-8 and platform encoding */ |
| |
| #include <stdio.h> |
| #include <stddef.h> |
| #include <stdlib.h> |
| #include <stdarg.h> |
| #include <string.h> |
| #include <ctype.h> |
| |
| #include "jni.h" |
| |
| #include "utf.h" |
| |
| /* |
| * Error handler |
| */ |
| void |
| utfError(char *file, int line, char *message) |
| { |
| (void)fprintf(stderr, "UTF ERROR [\"%s\":%d]: %s\n", file, line, message); |
| abort(); |
| } |
| |
| /* |
| * Convert UTF-8 to UTF-16 |
| * Returns length or -1 if output overflows. |
| */ |
| int JNICALL |
| utf8ToUtf16(struct UtfInst *ui, jbyte *utf8, int len, unsigned short *output, int outputMaxLen) |
| { |
| int outputLen; |
| int i; |
| |
| UTF_ASSERT(utf8); |
| UTF_ASSERT(len>=0); |
| UTF_ASSERT(output); |
| UTF_ASSERT(outputMaxLen>0); |
| |
| i = 0; |
| outputLen = 0; |
| while ( i<len ) { |
| unsigned code, x, y, z; |
| |
| if ( outputLen >= outputMaxLen ) { |
| return -1; |
| } |
| x = (unsigned char)utf8[i++]; |
| code = x; |
| if ( (x & 0xE0)==0xE0 ) { |
| y = (unsigned char)utf8[i++]; |
| z = (unsigned char)utf8[i++]; |
| code = ((x & 0xF)<<12) + ((y & 0x3F)<<6) + (z & 0x3F); |
| } else if ( (x & 0xC0)==0xC0 ) { |
| y = (unsigned char)utf8[i++]; |
| code = ((x & 0x1F)<<6) + (y & 0x3F); |
| } |
| output[outputLen++] = code; |
| } |
| return outputLen; |
| } |
| |
| /* |
| * Convert UTF-16 to UTF-8 Modified |
| * Returns length or -1 if output overflows. |
| */ |
| int JNICALL |
| utf16ToUtf8m(struct UtfInst *ui, unsigned short *utf16, int len, jbyte *output, int outputMaxLen) |
| { |
| int i; |
| int outputLen; |
| |
| UTF_ASSERT(utf16); |
| UTF_ASSERT(len>=0); |
| UTF_ASSERT(output); |
| UTF_ASSERT(outputMaxLen>0); |
| |
| outputLen = 0; |
| for (i = 0; i < len; i++) { |
| unsigned code; |
| |
| code = utf16[i]; |
| if ( code >= 0x0001 && code <= 0x007F ) { |
| if ( outputLen + 1 >= outputMaxLen ) { |
| return -1; |
| } |
| output[outputLen++] = code; |
| } else if ( code == 0 || ( code >= 0x0080 && code <= 0x07FF ) ) { |
| if ( outputLen + 2 >= outputMaxLen ) { |
| return -1; |
| } |
| output[outputLen++] = ((code>>6) & 0x1F) | 0xC0; |
| output[outputLen++] = (code & 0x3F) | 0x80; |
| } else if ( code >= 0x0800 && code <= 0xFFFF ) { |
| if ( outputLen + 3 >= outputMaxLen ) { |
| return -1; |
| } |
| output[outputLen++] = ((code>>12) & 0x0F) | 0xE0; |
| output[outputLen++] = ((code>>6) & 0x3F) | 0x80; |
| output[outputLen++] = (code & 0x3F) | 0x80; |
| } |
| } |
| output[outputLen] = 0; |
| return outputLen; |
| } |
| |
| int JNICALL |
| utf16ToUtf8s(struct UtfInst *ui, unsigned short *utf16, int len, jbyte *output, int outputMaxLen) |
| { |
| return -1; /* FIXUP */ |
| } |
| |
| /* Determine length of this Standard UTF-8 in Modified UTF-8. |
| * Validation is done of the basic UTF encoding rules, returns |
| * length (no change) when errors are detected in the UTF encoding. |
| * |
| * Note: Accepts Modified UTF-8 also, no verification on the |
| * correctness of Standard UTF-8 is done. e,g, 0xC080 input is ok. |
| */ |
| int JNICALL |
| utf8sToUtf8mLength(struct UtfInst *ui, jbyte *string, int length) |
| { |
| int newLength; |
| int i; |
| |
| newLength = 0; |
| for ( i = 0 ; i < length ; i++ ) { |
| unsigned byte; |
| |
| byte = (unsigned char)string[i]; |
| if ( (byte & 0x80) == 0 ) { /* 1byte encoding */ |
| newLength++; |
| if ( byte == 0 ) { |
| newLength++; /* We gain one byte in length on NULL bytes */ |
| } |
| } else if ( (byte & 0xE0) == 0xC0 ) { /* 2byte encoding */ |
| /* Check encoding of following bytes */ |
| if ( (i+1) >= length || (string[i+1] & 0xC0) != 0x80 ) { |
| break; /* Error condition */ |
| } |
| i++; /* Skip next byte */ |
| newLength += 2; |
| } else if ( (byte & 0xF0) == 0xE0 ) { /* 3byte encoding */ |
| /* Check encoding of following bytes */ |
| if ( (i+2) >= length || (string[i+1] & 0xC0) != 0x80 |
| || (string[i+2] & 0xC0) != 0x80 ) { |
| break; /* Error condition */ |
| } |
| i += 2; /* Skip next two bytes */ |
| newLength += 3; |
| } else if ( (byte & 0xF8) == 0xF0 ) { /* 4byte encoding */ |
| /* Check encoding of following bytes */ |
| if ( (i+3) >= length || (string[i+1] & 0xC0) != 0x80 |
| || (string[i+2] & 0xC0) != 0x80 |
| || (string[i+3] & 0xC0) != 0x80 ) { |
| break; /* Error condition */ |
| } |
| i += 3; /* Skip next 3 bytes */ |
| newLength += 6; /* 4byte encoding turns into 2 3byte ones */ |
| } else { |
| break; /* Error condition */ |
| } |
| } |
| if ( i != length ) { |
| /* Error in finding new length, return old length so no conversion */ |
| /* FIXUP: ERROR_MESSAGE? */ |
| return length; |
| } |
| return newLength; |
| } |
| |
| /* Convert Standard UTF-8 to Modified UTF-8. |
| * Assumes the UTF-8 encoding was validated by utf8mLength() above. |
| * |
| * Note: Accepts Modified UTF-8 also, no verification on the |
| * correctness of Standard UTF-8 is done. e,g, 0xC080 input is ok. |
| */ |
| void JNICALL |
| utf8sToUtf8m(struct UtfInst *ui, jbyte *string, int length, jbyte *newString, int newLength) |
| { |
| int i; |
| int j; |
| |
| j = 0; |
| for ( i = 0 ; i < length ; i++ ) { |
| unsigned byte1; |
| |
| byte1 = (unsigned char)string[i]; |
| |
| /* NULL bytes and bytes starting with 11110xxx are special */ |
| if ( (byte1 & 0x80) == 0 ) { /* 1byte encoding */ |
| if ( byte1 == 0 ) { |
| /* Bits out: 11000000 10000000 */ |
| newString[j++] = (jbyte)0xC0; |
| newString[j++] = (jbyte)0x80; |
| } else { |
| /* Single byte */ |
| newString[j++] = byte1; |
| } |
| } else if ( (byte1 & 0xE0) == 0xC0 ) { /* 2byte encoding */ |
| newString[j++] = byte1; |
| newString[j++] = string[++i]; |
| } else if ( (byte1 & 0xF0) == 0xE0 ) { /* 3byte encoding */ |
| newString[j++] = byte1; |
| newString[j++] = string[++i]; |
| newString[j++] = string[++i]; |
| } else if ( (byte1 & 0xF8) == 0xF0 ) { /* 4byte encoding */ |
| /* Beginning of 4byte encoding, turn into 2 3byte encodings */ |
| unsigned byte2, byte3, byte4, u21; |
| |
| /* Bits in: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */ |
| byte2 = (unsigned char)string[++i]; |
| byte3 = (unsigned char)string[++i]; |
| byte4 = (unsigned char)string[++i]; |
| /* Reconstruct full 21bit value */ |
| u21 = (byte1 & 0x07) << 18; |
| u21 += (byte2 & 0x3F) << 12; |
| u21 += (byte3 & 0x3F) << 6; |
| u21 += (byte4 & 0x3F); |
| /* Bits out: 11101101 1010xxxx 10xxxxxx */ |
| newString[j++] = (jbyte)0xED; |
| newString[j++] = (jbyte)(0xA0 + (((u21 >> 16) - 1) & 0x0F)); |
| newString[j++] = (jbyte)(0x80 + ((u21 >> 10) & 0x3F)); |
| /* Bits out: 11101101 1011xxxx 10xxxxxx */ |
| newString[j++] = (jbyte)0xED; |
| newString[j++] = (jbyte)(0xB0 + ((u21 >> 6) & 0x0F)); |
| newString[j++] = byte4; |
| } |
| } |
| UTF_ASSERT(i==length); |
| UTF_ASSERT(j==newLength); |
| newString[j] = (jbyte)0; |
| } |
| |
| /* Given a Modified UTF-8 string, calculate the Standard UTF-8 length. |
| * Basic validation of the UTF encoding rules is done, and length is |
| * returned (no change) when errors are detected. |
| * |
| * Note: No validation is made that this is indeed Modified UTF-8 coming in. |
| * |
| */ |
| int JNICALL |
| utf8mToUtf8sLength(struct UtfInst *ui, jbyte *string, int length) |
| { |
| int newLength; |
| int i; |
| |
| newLength = 0; |
| for ( i = 0 ; i < length ; i++ ) { |
| unsigned byte1, byte2, byte3, byte4, byte5, byte6; |
| |
| byte1 = (unsigned char)string[i]; |
| if ( (byte1 & 0x80) == 0 ) { /* 1byte encoding */ |
| newLength++; |
| } else if ( (byte1 & 0xE0) == 0xC0 ) { /* 2byte encoding */ |
| /* Check encoding of following bytes */ |
| if ( (i+1) >= length || (string[i+1] & 0xC0) != 0x80 ) { |
| break; /* Error condition */ |
| } |
| byte2 = (unsigned char)string[++i]; |
| if ( byte1 != 0xC0 || byte2 != 0x80 ) { |
| newLength += 2; /* Normal 2byte encoding, not 0xC080 */ |
| } else { |
| newLength++; /* We will turn 0xC080 into 0 */ |
| } |
| } else if ( (byte1 & 0xF0) == 0xE0 ) { /* 3byte encoding */ |
| /* Check encoding of following bytes */ |
| if ( (i+2) >= length || (string[i+1] & 0xC0) != 0x80 |
| || (string[i+2] & 0xC0) != 0x80 ) { |
| break; /* Error condition */ |
| } |
| byte2 = (unsigned char)string[++i]; |
| byte3 = (unsigned char)string[++i]; |
| newLength += 3; |
| /* Possible process a second 3byte encoding */ |
| if ( (i+3) < length && byte1 == 0xED && (byte2 & 0xF0) == 0xA0 ) { |
| /* See if this is a pair of 3byte encodings */ |
| byte4 = (unsigned char)string[i+1]; |
| byte5 = (unsigned char)string[i+2]; |
| byte6 = (unsigned char)string[i+3]; |
| if ( byte4 == 0xED && (byte5 & 0xF0) == 0xB0 ) { |
| /* Check encoding of 3rd byte */ |
| if ( (byte6 & 0xC0) != 0x80 ) { |
| break; /* Error condition */ |
| } |
| newLength++; /* New string will have 4byte encoding */ |
| i += 3; /* Skip next 3 bytes */ |
| } |
| } |
| } else { |
| break; /* Error condition */ |
| } |
| } |
| if ( i != length ) { |
| /* Error in UTF encoding */ |
| /* FIXUP: ERROR_MESSAGE()? */ |
| return length; |
| } |
| return newLength; |
| } |
| |
| /* Convert a Modified UTF-8 string into a Standard UTF-8 string |
| * It is assumed that this string has been validated in terms of the |
| * basic UTF encoding rules by utf8Length() above. |
| * |
| * Note: No validation is made that this is indeed Modified UTF-8 coming in. |
| * |
| */ |
| void JNICALL |
| utf8mToUtf8s(struct UtfInst *ui, jbyte *string, int length, jbyte *newString, int newLength) |
| { |
| int i; |
| int j; |
| |
| j = 0; |
| for ( i = 0 ; i < length ; i++ ) { |
| unsigned byte1, byte2, byte3, byte4, byte5, byte6; |
| |
| byte1 = (unsigned char)string[i]; |
| if ( (byte1 & 0x80) == 0 ) { /* 1byte encoding */ |
| /* Single byte */ |
| newString[j++] = byte1; |
| } else if ( (byte1 & 0xE0) == 0xC0 ) { /* 2byte encoding */ |
| byte2 = (unsigned char)string[++i]; |
| if ( byte1 != 0xC0 || byte2 != 0x80 ) { |
| newString[j++] = byte1; |
| newString[j++] = byte2; |
| } else { |
| newString[j++] = 0; |
| } |
| } else if ( (byte1 & 0xF0) == 0xE0 ) { /* 3byte encoding */ |
| byte2 = (unsigned char)string[++i]; |
| byte3 = (unsigned char)string[++i]; |
| if ( i+3 < length && byte1 == 0xED && (byte2 & 0xF0) == 0xA0 ) { |
| /* See if this is a pair of 3byte encodings */ |
| byte4 = (unsigned char)string[i+1]; |
| byte5 = (unsigned char)string[i+2]; |
| byte6 = (unsigned char)string[i+3]; |
| if ( byte4 == 0xED && (byte5 & 0xF0) == 0xB0 ) { |
| unsigned u21; |
| |
| /* Bits in: 11101101 1010xxxx 10xxxxxx */ |
| /* Bits in: 11101101 1011xxxx 10xxxxxx */ |
| i += 3; |
| |
| /* Reconstruct 21 bit code */ |
| u21 = ((byte2 & 0x0F) + 1) << 16; |
| u21 += (byte3 & 0x3F) << 10; |
| u21 += (byte5 & 0x0F) << 6; |
| u21 += (byte6 & 0x3F); |
| |
| /* Bits out: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */ |
| |
| /* Convert to 4byte encoding */ |
| newString[j++] = 0xF0 + ((u21 >> 18) & 0x07); |
| newString[j++] = 0x80 + ((u21 >> 12) & 0x3F); |
| newString[j++] = 0x80 + ((u21 >> 6) & 0x3F); |
| newString[j++] = 0x80 + (u21 & 0x3F); |
| continue; |
| } |
| } |
| /* Normal 3byte encoding */ |
| newString[j++] = byte1; |
| newString[j++] = byte2; |
| newString[j++] = byte3; |
| } |
| } |
| UTF_ASSERT(i==length); |
| UTF_ASSERT(j==newLength); |
| newString[j] = 0; |
| } |
| |
| /* ================================================================= */ |
| |
| #ifdef COMPILE_WITH_UTF_TEST /* Test program */ |
| |
| /* |
| * Convert any byte array into a printable string. |
| * Returns length or -1 if output overflows. |
| */ |
| static int |
| bytesToPrintable(struct UtfInst *ui, char *bytes, int len, char *output, int outputMaxLen) |
| { |
| int outputLen; |
| int i; |
| |
| UTF_ASSERT(bytes); |
| UTF_ASSERT(len>=0); |
| UTF_ASSERT(output); |
| UTF_ASSERT(outputMaxLen>=0); |
| |
| outputLen = 0; |
| for ( i=0; i<len ; i++ ) { |
| unsigned byte; |
| |
| byte = bytes[i]; |
| if ( byte <= 0x7f && isprint(byte) && !iscntrl(byte) ) { |
| if ( outputLen + 1 >= outputMaxLen ) { |
| return -1; |
| } |
| output[outputLen++] = (char)byte; |
| } else { |
| if ( outputLen + 4 >= outputMaxLen ) { |
| return -1; |
| } |
| (void)sprintf(output+outputLen,"\\x%02x",byte); |
| outputLen += 4; |
| } |
| } |
| output[outputLen] = 0; |
| return outputLen; |
| } |
| |
| static void |
| test(void) |
| { |
| static char *strings[] = { |
| "characters", |
| "abcdefghijklmnopqrstuvwxyz", |
| "0123456789", |
| "!@#$%^&*()_+=-{}[]:;", |
| NULL }; |
| int i; |
| struct UtfInst *ui; |
| |
| ui = utfInitialize(NULL); |
| |
| i = 0; |
| while ( strings[i] != NULL ) { |
| char *str; |
| #define MAX 1024 |
| char buf0[MAX]; |
| char buf1[MAX]; |
| char buf2[MAX]; |
| unsigned short buf3[MAX]; |
| int len1; |
| int len2; |
| int len3; |
| |
| str = strings[i]; |
| |
| (void)bytesToPrintable(ui, str, (int)strlen(str), buf0, 1024); |
| |
| len1 = utf8FromPlatform(ui, str, (int)strlen(str), (jbyte*)buf1, 1024); |
| |
| UTF_ASSERT(len1==(int)strlen(str)); |
| |
| len3 = utf8ToUtf16(ui, (jbyte*)buf1, len1, (jchar*)buf3, 1024); |
| |
| UTF_ASSERT(len3==len1); |
| |
| len1 = utf16ToUtf8m(ui, (jchar*)buf3, len3, (jbyte*)buf1, 1024); |
| |
| UTF_ASSERT(len1==len3); |
| UTF_ASSERT(strcmp(str, buf1) == 0); |
| |
| len2 = utf8ToPlatform(ui, (jbyte*)buf1, len1, buf2, 1024); |
| |
| UTF_ASSERT(len2==len1); |
| UTF_ASSERT(strcmp(str, buf2) == 0); |
| |
| i++; |
| } |
| |
| utfTerminate(ui, NULL); |
| |
| } |
| |
| int |
| main(int argc, char **argv) |
| { |
| test(); |
| return 0; |
| } |
| |
| #endif |
