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> 19dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <assert.h> 20dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <stdlib.h> 21e037fd7e193ecccbb5c0888e49f6d58c224bc11dThe Android Open Source Project#include <limits.h> 22dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 23dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* See http://www.unicode.org/reports/tr22/ for discussion 24dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * on invalid sequences 25dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 26dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 27dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define UTF16_REPLACEMENT_CHAR 0xfffd 28dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 29dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* Clever trick from Dianne that returns 1-4 depending on leading bit sequence*/ 30dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define UTF8_SEQ_LENGTH(ch) (((0xe5000000 >> ((ch >> 3) & 0x1e)) & 3) + 1) 31dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 32dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* note: macro expands to multiple lines */ 33dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define UTF8_SHIFT_AND_MASK(unicode, byte) \ 34dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project (unicode)<<=6; (unicode) |= (0x3f & (byte)); 35dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 36dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define UNICODE_UPPER_LIMIT 0x10fffd 37dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 38dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/** 39dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * out_len is an out parameter (which may not be null) containing the 40dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * length of the UTF-16 string (which may contain embedded \0's) 41dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 42dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 43dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectextern char16_t * strdup8to16 (const char* s, size_t *out_len) 44dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 45dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char16_t *ret; 46dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project size_t len; 47dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 48dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (s == NULL) return NULL; 49dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 50dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project len = strlen8to16(s); 51dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 52e037fd7e193ecccbb5c0888e49f6d58c224bc11dThe Android Open Source Project // fail on overflow 53e037fd7e193ecccbb5c0888e49f6d58c224bc11dThe Android Open Source Project if (len && SIZE_MAX/len < sizeof(char16_t)) 54e037fd7e193ecccbb5c0888e49f6d58c224bc11dThe Android Open Source Project return NULL; 55e037fd7e193ecccbb5c0888e49f6d58c224bc11dThe Android Open Source Project 56dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project // no plus-one here. UTF-16 strings are not null terminated 57dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ret = (char16_t *) malloc (sizeof(char16_t) * len); 58dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 59dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return strcpy8to16 (ret, s, out_len); 60dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 61dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 62dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/** 63dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Like "strlen", but for strings encoded with Java's modified UTF-8. 64dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 65dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * The value returned is the number of UTF-16 characters required 66dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * to represent this string. 67dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 68dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectextern size_t strlen8to16 (const char* utf8Str) 69dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 70dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project size_t len = 0; 71dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int ic; 72dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int expected = 0; 73dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 74dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while ((ic = *utf8Str++) != '\0') { 75dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* bytes that start 0? or 11 are lead bytes and count as characters.*/ 76dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* bytes that start 10 are extention bytes and are not counted */ 77dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 78dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if ((ic & 0xc0) == 0x80) { 79dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* count the 0x80 extention bytes. if we have more than 80dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * expected, then start counting them because strcpy8to16 81dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * will insert UTF16_REPLACEMENT_CHAR's 82dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 83dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project expected--; 84dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (expected < 0) { 85dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project len++; 86dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 87dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 88dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project len++; 89dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project expected = UTF8_SEQ_LENGTH(ic) - 1; 90dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 91dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* this will result in a surrogate pair */ 92dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (expected == 3) { 93dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project len++; 94dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 95dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 96dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 97dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 98dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return len; 99dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 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 * Retrieve the next UTF-32 character from a UTF-8 string. 105dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 106dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Stops at inner \0's 107dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 108dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Returns UTF16_REPLACEMENT_CHAR if an invalid sequence is encountered 109dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 110dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Advances "*pUtf8Ptr" to the start of the next character. 111dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 112dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic inline uint32_t getUtf32FromUtf8(const char** pUtf8Ptr) 113dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 114dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project uint32_t ret; 115dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int seq_len; 116dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int i; 117dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 118dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Mask for leader byte for lengths 1, 2, 3, and 4 respectively*/ 119dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project static const char leaderMask[4] = {0xff, 0x1f, 0x0f, 0x07}; 120dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 121dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Bytes that start with bits "10" are not leading characters. */ 122dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (((**pUtf8Ptr) & 0xc0) == 0x80) { 123dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project (*pUtf8Ptr)++; 124dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return UTF16_REPLACEMENT_CHAR; 125dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 126dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 127dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* note we tolerate invalid leader 11111xxx here */ 128dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project seq_len = UTF8_SEQ_LENGTH(**pUtf8Ptr); 129dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 130dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ret = (**pUtf8Ptr) & leaderMask [seq_len - 1]; 131dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 132dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (**pUtf8Ptr == '\0') return ret; 133dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 134dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project (*pUtf8Ptr)++; 135dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project for (i = 1; i < seq_len ; i++, (*pUtf8Ptr)++) { 136dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if ((**pUtf8Ptr) == '\0') return UTF16_REPLACEMENT_CHAR; 137dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (((**pUtf8Ptr) & 0xc0) != 0x80) return UTF16_REPLACEMENT_CHAR; 138dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 139dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project UTF8_SHIFT_AND_MASK(ret, **pUtf8Ptr); 140dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 141dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 142dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return ret; 143dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 144dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 145dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 146dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/** 147dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * out_len is an out parameter (which may not be null) containing the 148dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * length of the UTF-16 string (which may contain embedded \0's) 149dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 150dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 151dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectextern char16_t * strcpy8to16 (char16_t *utf16Str, const char*utf8Str, 152dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project size_t *out_len) 153dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 154dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char16_t *dest = utf16Str; 155dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 156dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while (*utf8Str != '\0') { 157dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project uint32_t ret; 158dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 159dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ret = getUtf32FromUtf8(&utf8Str); 160dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 161dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (ret <= 0xffff) { 162dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = (char16_t) ret; 163dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else if (ret <= UNICODE_UPPER_LIMIT) { 164dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Create surrogate pairs */ 165dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* See http://en.wikipedia.org/wiki/UTF-16/UCS-2#Method_for_code_points_in_Plane_1.2C_Plane_2 */ 166dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 167dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = 0xd800 | ((ret - 0x10000) >> 10); 168dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = 0xdc00 | ((ret - 0x10000) & 0x3ff); 169dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 170dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = UTF16_REPLACEMENT_CHAR; 171dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 172dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 173dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 174dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *out_len = dest - utf16Str; 175dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 176dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return utf16Str; 177dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 178dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 179dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/** 180dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * length is the number of characters in the UTF-8 string. 181dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * out_len is an out parameter (which may not be null) containing the 182dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * length of the UTF-16 string (which may contain embedded \0's) 183dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 184dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 185dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectextern char16_t * strcpylen8to16 (char16_t *utf16Str, const char*utf8Str, 186dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int length, size_t *out_len) 187dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 188dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* TODO: Share more of this code with the method above. Only 2 lines changed. */ 189dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 190dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char16_t *dest = utf16Str; 191dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 192dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project const char *end = utf8Str + length; /* This line */ 193dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while (utf8Str < end) { /* and this line changed. */ 194dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project uint32_t ret; 195dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 196dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ret = getUtf32FromUtf8(&utf8Str); 197dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 198dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (ret <= 0xffff) { 199dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = (char16_t) ret; 200dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else if (ret <= UNICODE_UPPER_LIMIT) { 201dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Create surrogate pairs */ 202dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* See http://en.wikipedia.org/wiki/UTF-16/UCS-2#Method_for_code_points_in_Plane_1.2C_Plane_2 */ 203dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 204dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = 0xd800 | ((ret - 0x10000) >> 10); 205dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = 0xdc00 | ((ret - 0x10000) & 0x3ff); 206dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 207dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *dest++ = UTF16_REPLACEMENT_CHAR; 208dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 209dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 210dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 211dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *out_len = dest - utf16Str; 212dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 213dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return utf16Str; 214dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 215