reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame^] | 1 | /* libs/graphics/ports/SkXMLParser_expat.cpp |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include "SkXMLParser.h" |
| 19 | #include "SkString.h" |
| 20 | #include "SkStream.h" |
| 21 | |
| 22 | #include "expat.h" |
| 23 | |
| 24 | #ifdef SK_BUILD_FOR_PPI |
| 25 | #define CHAR_16_TO_9 |
| 26 | #endif |
| 27 | |
| 28 | #if defined CHAR_16_TO_9 |
| 29 | inline size_t sk_wcslen(const short* char16) { |
| 30 | const short* start = char16; |
| 31 | while (*char16) |
| 32 | char16++; |
| 33 | return char16 - start; |
| 34 | } |
| 35 | |
| 36 | inline const char* ConvertUnicodeToChar(const short* ch16, size_t len, SkAutoMalloc& ch8Malloc) { |
| 37 | char* ch8 = (char*) ch8Malloc.get(); |
| 38 | int index; |
| 39 | for (index = 0; index < len; index++) |
| 40 | ch8[index] = (char) ch16[index]; |
| 41 | ch8[index] = '\0'; |
| 42 | return ch8; |
| 43 | } |
| 44 | #endif |
| 45 | |
| 46 | static void XMLCALL start_proc(void *data, const char *el, const char **attr) |
| 47 | { |
| 48 | #if defined CHAR_16_TO_9 |
| 49 | size_t len = sk_wcslen((const short*) el); |
| 50 | SkAutoMalloc el8(len + 1); |
| 51 | el = ConvertUnicodeToChar((const short*) el, len, el8); |
| 52 | #endif |
| 53 | if (((SkXMLParser*)data)->startElement(el)) { |
| 54 | XML_StopParser((XML_Parser) ((SkXMLParser*)data)->fParser, false); |
| 55 | return; |
| 56 | } |
| 57 | while (*attr) |
| 58 | { |
| 59 | const char* attr0 = attr[0]; |
| 60 | const char* attr1 = attr[1]; |
| 61 | #if defined CHAR_16_TO_9 |
| 62 | size_t len0 = sk_wcslen((const short*) attr0); |
| 63 | SkAutoMalloc attr0_8(len0 + 1); |
| 64 | attr0 = ConvertUnicodeToChar((const short*) attr0, len0, attr0_8); |
| 65 | size_t len1 = sk_wcslen((const short*) attr1); |
| 66 | SkAutoMalloc attr1_8(len1 + 1); |
| 67 | attr1 = ConvertUnicodeToChar((const short*) attr1, len1, attr1_8); |
| 68 | #endif |
| 69 | if (((SkXMLParser*)data)->addAttribute(attr0, attr1)) { |
| 70 | XML_StopParser((XML_Parser) ((SkXMLParser*)data)->fParser, false); |
| 71 | return; |
| 72 | } |
| 73 | attr += 2; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | static void XMLCALL end_proc(void *data, const char *el) |
| 78 | { |
| 79 | #if defined CHAR_16_TO_9 |
| 80 | size_t len = sk_wcslen((const short*) el); |
| 81 | SkAutoMalloc el8(len + 1); |
| 82 | el = ConvertUnicodeToChar((const short*) el, len, el8); |
| 83 | #endif |
| 84 | if (((SkXMLParser*)data)->endElement(el)) |
| 85 | XML_StopParser((XML_Parser) ((SkXMLParser*)data)->fParser, false); |
| 86 | } |
| 87 | |
| 88 | static void XMLCALL text_proc(void* data, const char* text, int len) |
| 89 | { |
| 90 | #if defined CHAR_16_TO_9 |
| 91 | SkAutoMalloc text8(len + 1); |
| 92 | text = ConvertUnicodeToChar((const short*) text, len, text8); |
| 93 | #endif |
| 94 | if (((SkXMLParser*)data)->text(text, len)) |
| 95 | XML_StopParser((XML_Parser) ((SkXMLParser*)data)->fParser, false); |
| 96 | } |
| 97 | |
| 98 | bool SkXMLParser::parse(const char doc[], size_t len) |
| 99 | { |
| 100 | if (len == 0) { |
| 101 | fError->fCode = SkXMLParserError::kEmptyFile; |
| 102 | reportError(NULL); |
| 103 | return false; |
| 104 | } |
| 105 | XML_Parser p = XML_ParserCreate(NULL); |
| 106 | SkASSERT(p); |
| 107 | fParser = p; |
| 108 | XML_SetElementHandler(p, start_proc, end_proc); |
| 109 | XML_SetCharacterDataHandler(p, text_proc); |
| 110 | XML_SetUserData(p, this); |
| 111 | |
| 112 | bool success = true; |
| 113 | int error = XML_Parse(p, doc, len, true); |
| 114 | if (error == XML_STATUS_ERROR) { |
| 115 | reportError(p); |
| 116 | success = false; |
| 117 | } |
| 118 | XML_ParserFree(p); |
| 119 | return success; |
| 120 | } |
| 121 | |
| 122 | bool SkXMLParser::parse(SkStream& input) |
| 123 | { |
| 124 | size_t len = input.read(NULL, 0); |
| 125 | SkAutoMalloc am(len); |
| 126 | char* doc = (char*)am.get(); |
| 127 | |
| 128 | input.rewind(); |
| 129 | size_t len2 = input.read(doc, len); |
| 130 | SkASSERT(len2 == len); |
| 131 | |
| 132 | return this->parse(doc, len2); |
| 133 | } |
| 134 | |
| 135 | void SkXMLParser::reportError(void* p) |
| 136 | { |
| 137 | XML_Parser parser = (XML_Parser) p; |
| 138 | if (fError && parser) { |
| 139 | fError->fNativeCode = XML_GetErrorCode(parser); |
| 140 | fError->fLineNumber = XML_GetCurrentLineNumber(parser); |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | void SkXMLParser::GetNativeErrorString(int error, SkString* str) |
| 145 | { |
| 146 | if (str) |
| 147 | str->set(XML_ErrorString((XML_Error) error)); |
| 148 | } |
| 149 | |