| /* |
| * Copyright (c) 1998, 2016, 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. |
| */ |
| |
| #include <stdlib.h> |
| #include <ctype.h> |
| |
| #include "jni.h" |
| |
| #include "utf_util.h" |
| |
| |
| /* Error and assert macros */ |
| #define UTF_ERROR(m) utfError(__FILE__, __LINE__, m) |
| #define UTF_ASSERT(x) ( (x)==0 ? UTF_ERROR("ASSERT ERROR " #x) : (void)0 ) |
| |
| // Platform independed part |
| |
| static void utfError(char *file, int line, char *message) { |
| (void)fprintf(stderr, "UTF ERROR [\"%s\":%d]: %s\n", file, line, message); |
| abort(); |
| } |
| |
| /* 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(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(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(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(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 _WIN32 |
| // Microsoft Windows specific part |
| |
| #include <windows.h> |
| |
| static UINT getCodepage() { |
| LANGID langID; |
| LCID localeID; |
| TCHAR strCodePage[7]; // ANSI code page id |
| |
| static UINT intCodePage = -1; |
| |
| if (intCodePage == -1) { |
| // Firts call, get codepage from the os |
| langID = LANGIDFROMLCID(GetUserDefaultLCID()); |
| localeID = MAKELCID(langID, SORT_DEFAULT); |
| if (GetLocaleInfo(localeID, LOCALE_IDEFAULTANSICODEPAGE, |
| strCodePage, sizeof(strCodePage)/sizeof(TCHAR)) > 0 ) { |
| intCodePage = atoi(strCodePage); |
| } |
| else { |
| intCodePage = GetACP(); |
| } |
| } |
| |
| return intCodePage; |
| } |
| |
| /* |
| * Get wide string (assumes len>0) |
| */ |
| static WCHAR* getWideString(UINT codePage, char* str, int len, int *pwlen) { |
| int wlen; |
| WCHAR* wstr; |
| |
| /* Convert the string to WIDE string */ |
| wlen = MultiByteToWideChar(codePage, 0, str, len, NULL, 0); |
| *pwlen = wlen; |
| if (wlen <= 0) { |
| UTF_ERROR(("Can't get WIDE string length")); |
| return NULL; |
| } |
| wstr = (WCHAR*)malloc(wlen * sizeof(WCHAR)); |
| if (wstr == NULL) { |
| UTF_ERROR(("Can't malloc() any space")); |
| return NULL; |
| } |
| if (MultiByteToWideChar(codePage, 0, str, len, wstr, wlen) == 0) { |
| UTF_ERROR(("Can't get WIDE string")); |
| return NULL; |
| } |
| return wstr; |
| } |
| |
| /* |
| * Convert UTF-8 to a platform string |
| * NOTE: outputBufSize includes the space for the trailing 0. |
| */ |
| int JNICALL utf8ToPlatform(jbyte *utf8, int len, char* output, int outputBufSize) { |
| int wlen; |
| int plen; |
| WCHAR* wstr; |
| UINT codepage; |
| int outputMaxLen; |
| |
| UTF_ASSERT(utf8); |
| UTF_ASSERT(output); |
| UTF_ASSERT(len >= 0); |
| UTF_ASSERT(outputBufSize > len); |
| outputMaxLen = outputBufSize - 1; // leave space for trailing 0 |
| |
| /* Zero length is ok, but we don't need to do much */ |
| if ( len == 0 ) { |
| output[0] = 0; |
| return 0; |
| } |
| |
| /* Get WIDE string version (assumes len>0) */ |
| wstr = getWideString(CP_UTF8, (char*)utf8, len, &wlen); |
| if ( wstr == NULL ) { |
| // Can't allocate WIDE string |
| goto just_copy_bytes; |
| } |
| |
| /* Convert WIDE string to MultiByte string */ |
| codepage = getCodepage(); |
| plen = WideCharToMultiByte(codepage, 0, wstr, wlen, |
| output, outputMaxLen, NULL, NULL); |
| free(wstr); |
| if (plen <= 0) { |
| // Can't convert WIDE string to multi-byte |
| goto just_copy_bytes; |
| } |
| output[plen] = '\0'; |
| return plen; |
| |
| just_copy_bytes: |
| (void)memcpy(output, utf8, len); |
| output[len] = 0; |
| return len; |
| } |
| |
| /* |
| * Convert Platform Encoding to UTF-8. |
| * NOTE: outputBufSize includes the space for the trailing 0. |
| */ |
| int JNICALL utf8FromPlatform(char *str, int len, jbyte *output, int outputBufSize) { |
| int wlen; |
| int plen; |
| WCHAR* wstr; |
| UINT codepage; |
| int outputMaxLen; |
| |
| UTF_ASSERT(str); |
| UTF_ASSERT(output); |
| UTF_ASSERT(len >= 0); |
| UTF_ASSERT(outputBufSize > len); |
| outputMaxLen = outputBufSize - 1; // leave space for trailing 0 |
| |
| /* Zero length is ok, but we don't need to do much */ |
| if ( len == 0 ) { |
| output[0] = 0; |
| return 0; |
| } |
| |
| /* Get WIDE string version (assumes len>0) */ |
| codepage = getCodepage(); |
| wstr = getWideString(codepage, str, len, &wlen); |
| if ( wstr == NULL ) { |
| goto just_copy_bytes; |
| } |
| |
| /* Convert WIDE string to UTF-8 string */ |
| plen = WideCharToMultiByte(CP_UTF8, 0, wstr, wlen, |
| (char*)output, outputMaxLen, NULL, NULL); |
| free(wstr); |
| if (plen <= 0) { |
| UTF_ERROR(("Can't convert WIDE string to multi-byte")); |
| goto just_copy_bytes; |
| } |
| output[plen] = '\0'; |
| return plen; |
| |
| just_copy_bytes: |
| (void)memcpy(output, str, len); |
| output[len] = 0; |
| return len; |
| } |
| |
| |
| #else |
| // *NIX specific part |
| |
| #include <iconv.h> |
| #include <locale.h> |
| #include <langinfo.h> |
| #include <string.h> |
| |
| typedef enum {TO_UTF8, FROM_UTF8} conv_direction; |
| |
| /* |
| * Do iconv() conversion. |
| * Returns length or -1 if output overflows. |
| * NOTE: outputBufSize includes the space for the trailing 0. |
| */ |
| static int iconvConvert(conv_direction drn, char *bytes, size_t len, char *output, size_t outputBufSize) { |
| |
| static char *codeset = 0; |
| iconv_t func; |
| size_t bytes_converted; |
| size_t inLeft, outLeft; |
| char *inbuf, *outbuf; |
| int outputMaxLen; |
| |
| UTF_ASSERT(bytes); |
| UTF_ASSERT(output); |
| UTF_ASSERT(outputBufSize > len); |
| outputMaxLen = outputBufSize - 1; // leave space for trailing 0 |
| |
| /* Zero length is ok, but we don't need to do much */ |
| if ( len == 0 ) { |
| output[0] = 0; |
| return 0; |
| } |
| |
| if (codeset == NULL && codeset != (char *) -1) { |
| // locale is not initialized, do it now |
| if (setlocale(LC_ALL, "") != NULL) { |
| // nl_langinfo returns ANSI_X3.4-1968 by default |
| codeset = (char*)nl_langinfo(CODESET); |
| } |
| |
| if (codeset == NULL) { |
| // Not able to intialize process locale from platform one. |
| codeset = (char *) -1; |
| } |
| } |
| |
| if (codeset == (char *) -1) { |
| // There was an error during initialization, so just bail out |
| goto just_copy_bytes; |
| } |
| |
| func = (drn == TO_UTF8) ? iconv_open(codeset, "UTF-8") : iconv_open("UTF-8", codeset); |
| if (func == (iconv_t) -1) { |
| // Requested charset combination is not supported, conversion couldn't be done. |
| // make sure we will not try it again |
| codeset = (char *) -1; |
| goto just_copy_bytes; |
| } |
| |
| // perform conversion |
| inbuf = bytes; |
| outbuf = output; |
| inLeft = len; |
| outLeft = outputMaxLen; |
| |
| bytes_converted = iconv(func, (void*)&inbuf, &inLeft, &outbuf, &outLeft); |
| if (bytes_converted == (size_t) -1 || bytes_converted == 0 || inLeft != 0) { |
| // Input string is invalid, not able to convert entire string |
| // or some other iconv error happens. |
| iconv_close(func); |
| goto just_copy_bytes; |
| } |
| |
| iconv_close(func); |
| // Overwrite bytes_converted with value of actually stored bytes |
| bytes_converted = outputMaxLen-outLeft; |
| output[bytes_converted] = 0; |
| return bytes_converted; |
| |
| |
| just_copy_bytes: |
| (void)memcpy(output, bytes, len); |
| output[len] = 0; |
| return len; |
| } |
| |
| /* |
| * Convert UTF-8 to Platform Encoding. |
| * Returns length or -1 if output overflows. |
| * NOTE: outputBufSize includes the space for the trailing 0. |
| */ |
| int JNICALL utf8ToPlatform(jbyte *utf8, int len, char *output, int outputBufSize) { |
| return iconvConvert(FROM_UTF8, (char*)utf8, len, output, outputBufSize); |
| } |
| |
| /* |
| * Convert Platform Encoding to UTF-8. |
| * Returns length or -1 if output overflows. |
| * NOTE: outputBufSize includes the space for the trailing 0. |
| */ |
| int JNICALL utf8FromPlatform(char *str, int len, jbyte *output, int outputBufSize) { |
| return iconvConvert(TO_UTF8, str, len, (char*) output, outputBufSize); |
| } |
| |
| #endif |
