1dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* libs/cutils/strdup8to16.c 2dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** 3dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** Copyright 2006, The Android Open Source Project 4dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** 5dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** Licensed under the Apache License, Version 2.0 (the "License"); 6dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** you may not use this file except in compliance with the License. 7dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** You may obtain a copy of the License at 8dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** 9dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** http://www.apache.org/licenses/LICENSE-2.0 10dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** 11dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** Unless required by applicable law or agreed to in writing, software 12dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** distributed under the License is distributed on an "AS IS" BASIS, 13dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** See the License for the specific language governing permissions and 15dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** limitations under the License. 16dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project*/ 17dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 18dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <cutils/jstring.h> 198e9aeb9053695a14539653093937158d15385ca6Elliott Hughes 20dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <assert.h> 21e037fd7e193ecccbb5c0888e49f6d58c224bc11dThe Android Open Source Project#include <limits.h> 228e9aeb9053695a14539653093937158d15385ca6Elliott Hughes#include <stdlib.h> 23dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 24dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* See http://www.unicode.org/reports/tr22/ for discussion 25dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * on invalid sequences 26dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 27dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 28dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define UTF16_REPLACEMENT_CHAR 0xfffd 29dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 30dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* Clever trick from Dianne that returns 1-4 depending on leading bit sequence*/ 31c713bce90183fa4ade82bc6f4b08280d32f1fb58Chih-Hung Hsieh#define UTF8_SEQ_LENGTH(ch) (((0xe5000000 >> (((ch) >> 3) & 0x1e)) & 3) + 1) 32dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 33dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* note: macro expands to multiple lines */ 34dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define UTF8_SHIFT_AND_MASK(unicode, byte) \ 35dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project (unicode)<<=6; (unicode) |= (0x3f & (byte)); 36dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 37dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define UNICODE_UPPER_LIMIT 0x10fffd 38dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 39dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/** 40dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * out_len is an out parameter (which may not be null) containing the 41dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * length of the UTF-16 string (which may contain embedded \0's) 42dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 43dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 44dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectextern char16_t * strdup8to16 (const char* s, size_t *out_len) 45dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 46dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char16_t *ret; 47dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project size_t len; 48dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 49dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (s == NULL) return NULL; 50dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 51dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project len = strlen8to16(s); 52dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 53e037fd7e193ecccbb5c0888e49f6d58c224bc11dThe Android Open Source Project // fail on overflow 54e037fd7e193ecccbb5c0888e49f6d58c224bc11dThe Android Open Source Project if (len && SIZE_MAX/len < sizeof(char16_t)) 55e037fd7e193ecccbb5c0888e49f6d58c224bc11dThe Android Open Source Project return NULL; 56e037fd7e193ecccbb5c0888e49f6d58c224bc11dThe Android Open Source Project 57dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project // no plus-one here. UTF-16 strings are not null terminated 58dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ret = (char16_t *) malloc (sizeof(char16_t) * len); 59dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 60dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return strcpy8to16 (ret, s, out_len); 61dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 62dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 63dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/** 64dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Like "strlen", but for strings encoded with Java's modified UTF-8. 65dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 66dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * The value returned is the number of UTF-16 characters required 67dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * to represent this string. 68dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 69dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectextern size_t strlen8to16 (const char* utf8Str) 70dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 71dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project size_t len = 0; 72dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int ic; 73dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int expected = 0; 74dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 75dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while ((ic = *utf8Str++) != '\0') { 76dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* bytes that start 0? or 11 are lead bytes and count as characters.*/ 77dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* bytes that start 10 are extention bytes and are not counted */ 78dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 79dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if ((ic & 0xc0) == 0x80) { 80dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* count the 0x80 extention bytes. if we have more than 81dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * expected, then start counting them because strcpy8to16 82dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * will insert UTF16_REPLACEMENT_CHAR's 83dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 84dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project expected--; 85dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (expected < 0) { 86dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project len++; 87dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 88dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 89dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project len++; 90dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project expected = UTF8_SEQ_LENGTH(ic) - 1; 91dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 92dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* this will result in a surrogate pair */ 93dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (expected == 3) { 94dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project len++; 95dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 96dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 97dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 98dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 99dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return len; 100dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 101dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 102dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 103dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 104dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 105dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Retrieve the next UTF-32 character from a UTF-8 string. 106dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 107dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Stops at inner \0's 108dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 109dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Returns UTF16_REPLACEMENT_CHAR if an invalid sequence is encountered 110dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 111dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Advances "*pUtf8Ptr" to the start of the next character. 112dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 113dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic inline uint32_t getUtf32FromUtf8(const char** pUtf8Ptr) 114dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 115dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project uint32_t ret; 116dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int seq_len; 117dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int i; 118dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 119dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Mask for leader byte for lengths 1, 2, 3, and 4 respectively*/ 1208e9aeb9053695a14539653093937158d15385ca6Elliott Hughes static const unsigned char leaderMask[4] = {0xff, 0x1f, 0x0f, 0x07}; 121dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 122dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Bytes that start with bits "10" are not leading characters. */ 123dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (((**pUtf8Ptr) & 0xc0) == 0x80) { 124dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project (*pUtf8Ptr)++; 125dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return UTF16_REPLACEMENT_CHAR; 126dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 127dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 128dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* note we tolerate invalid leader 11111xxx here */ 129dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project seq_len = UTF8_SEQ_LENGTH(**pUtf8Ptr); 130dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 131dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ret = (**pUtf8Ptr) & leaderMask [seq_len - 1]; 132dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 133dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (**pUtf8Ptr == '\0') return ret; 134dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 135dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project (*pUtf8Ptr)++; 136dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project for (i = 1; i < seq_len ; i++, (*pUtf8Ptr)++) { 137dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if ((**pUtf8Ptr) == '\0') return UTF16_REPLACEMENT_CHAR; 138dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (((**pUtf8Ptr) & 0xc0) != 0x80) return UTF16_REPLACEMENT_CHAR; 139dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 140dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project UTF8_SHIFT_AND_MASK(ret, **pUtf8Ptr); 141dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 142dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 143dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return ret; 144dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 145dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 146dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 147dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/** 148dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * out_len is an out parameter (which may not be null) containing the 149dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * length of the UTF-16 string (which may contain embedded \0's) 150dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 151dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 152dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectextern char16_t * strcpy8to16 (char16_t *utf16Str, const char*utf8Str, 153dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project size_t *out_len) 154dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 155dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char16_t *dest = utf16Str; 156dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 157dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while (*utf8Str != '\0') { 158dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project uint32_t ret; 159dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 160dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ret = getUtf32FromUtf8(&utf8Str); 161dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 162dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (ret <= 0xffff) { 163dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = (char16_t) ret; 164dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else if (ret <= UNICODE_UPPER_LIMIT) { 165dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Create surrogate pairs */ 166dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* See http://en.wikipedia.org/wiki/UTF-16/UCS-2#Method_for_code_points_in_Plane_1.2C_Plane_2 */ 167dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 168dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = 0xd800 | ((ret - 0x10000) >> 10); 169dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = 0xdc00 | ((ret - 0x10000) & 0x3ff); 170dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 171dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = UTF16_REPLACEMENT_CHAR; 172dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 173dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 174dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 175dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *out_len = dest - utf16Str; 176dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 177dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return utf16Str; 178dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 179dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 180dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/** 181dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * length is the number of characters in the UTF-8 string. 182dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * out_len is an out parameter (which may not be null) containing the 183dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * length of the UTF-16 string (which may contain embedded \0's) 184dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 185dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 186dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectextern char16_t * strcpylen8to16 (char16_t *utf16Str, const char*utf8Str, 187dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int length, size_t *out_len) 188dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 189dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* TODO: Share more of this code with the method above. Only 2 lines changed. */ 190dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 191dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char16_t *dest = utf16Str; 192dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 193dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project const char *end = utf8Str + length; /* This line */ 194dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while (utf8Str < end) { /* and this line changed. */ 195dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project uint32_t ret; 196dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 197dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ret = getUtf32FromUtf8(&utf8Str); 198dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 199dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (ret <= 0xffff) { 200dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = (char16_t) ret; 201dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else if (ret <= UNICODE_UPPER_LIMIT) { 202dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Create surrogate pairs */ 203dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* See http://en.wikipedia.org/wiki/UTF-16/UCS-2#Method_for_code_points_in_Plane_1.2C_Plane_2 */ 204dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 205dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = 0xd800 | ((ret - 0x10000) >> 10); 206dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = 0xdc00 | ((ret - 0x10000) & 0x3ff); 207dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 208dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = UTF16_REPLACEMENT_CHAR; 209dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 210dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 211dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 212dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *out_len = dest - utf16Str; 213dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 214dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return utf16Str; 215dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 216