The Tor Browser / file comparison
comparison: gfx/skia/trunk/src/ports/SkXMLPullParser_expat.cpp
gfx/skia/trunk/src/ports/SkXMLPullParser_expat.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
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replaced
| -1:000000000000 | 0:4e13d4f15aac |
|---|---|
| 1 | |
| 2 /* | |
| 3 * Copyright 2006 The Android Open Source Project | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 | |
| 10 #include "SkXMLParser.h" | |
| 11 #include "SkChunkAlloc.h" | |
| 12 #include "SkString.h" | |
| 13 #include "SkStream.h" | |
| 14 | |
| 15 #include "expat.h" | |
| 16 | |
| 17 static inline char* dupstr(SkChunkAlloc& chunk, const char src[], size_t len) | |
| 18 { | |
| 19 SkASSERT(src); | |
| 20 char* dst = (char*)chunk.alloc(len + 1, SkChunkAlloc::kThrow_AllocFailType); | |
| 21 | |
| 22 memcpy(dst, src, len); | |
| 23 dst[len] = 0; | |
| 24 return dst; | |
| 25 } | |
| 26 | |
| 27 static inline int count_pairs(const char** p) | |
| 28 { | |
| 29 const char** start = p; | |
| 30 while (*p) | |
| 31 { | |
| 32 SkASSERT(p[1] != NULL); | |
| 33 p += 2; | |
| 34 } | |
| 35 return (p - start) >> 1; | |
| 36 } | |
| 37 | |
| 38 struct Data { | |
| 39 Data() : fAlloc(2048), fState(NORMAL) {} | |
| 40 | |
| 41 XML_Parser fParser; | |
| 42 SkXMLPullParser::Curr* fCurr; | |
| 43 SkChunkAlloc fAlloc; | |
| 44 | |
| 45 enum State { | |
| 46 NORMAL, | |
| 47 MISSED_START_TAG, | |
| 48 RETURN_END_TAG | |
| 49 }; | |
| 50 State fState; | |
| 51 const char* fEndTag; // if state is RETURN_END_TAG | |
| 52 }; | |
| 53 | |
| 54 static void XMLCALL start_proc(void *data, const char *el, const char **attr) | |
| 55 { | |
| 56 Data* p = (Data*)data; | |
| 57 SkXMLPullParser::Curr* c = p->fCurr; | |
| 58 SkChunkAlloc& alloc = p->fAlloc; | |
| 59 | |
| 60 c->fName = dupstr(alloc, el, strlen(el)); | |
| 61 | |
| 62 int n = count_pairs(attr); | |
| 63 SkXMLPullParser::AttrInfo* info = (SkXMLPullParser::AttrInfo*)alloc.alloc(n * sizeof(SkXMLPullParser::AttrInfo), | |
| 64 SkChunkAlloc::kThrow_AllocFailType); | |
| 65 c->fAttrInfoCount = n; | |
| 66 c->fAttrInfos = info; | |
| 67 | |
| 68 for (int i = 0; i < n; i++) | |
| 69 { | |
| 70 info[i].fName = dupstr(alloc, attr[0], strlen(attr[0])); | |
| 71 info[i].fValue = dupstr(alloc, attr[1], strlen(attr[1])); | |
| 72 attr += 2; | |
| 73 } | |
| 74 | |
| 75 c->fEventType = SkXMLPullParser::START_TAG; | |
| 76 XML_StopParser(p->fParser, true); | |
| 77 } | |
| 78 | |
| 79 static void XMLCALL end_proc(void *data, const char *el) | |
| 80 { | |
| 81 Data* p = (Data*)data; | |
| 82 SkXMLPullParser::Curr* c = p->fCurr; | |
| 83 | |
| 84 if (c->fEventType == SkXMLPullParser::START_TAG) | |
| 85 { | |
| 86 /* if we get here, we were called with a start_tag immediately | |
| 87 followed by this end_tag. The caller will only see the end_tag, | |
| 88 so we set a flag to notify them of the missed start_tag | |
| 89 */ | |
| 90 p->fState = Data::MISSED_START_TAG; | |
| 91 | |
| 92 SkASSERT(c->fName != NULL); | |
| 93 SkASSERT(strcmp(c->fName, el) == 0); | |
| 94 } | |
| 95 else | |
| 96 c->fName = dupstr(p->fAlloc, el, strlen(el)); | |
| 97 | |
| 98 c->fEventType = SkXMLPullParser::END_TAG; | |
| 99 XML_StopParser(p->fParser, true); | |
| 100 } | |
| 101 | |
| 102 #include <ctype.h> | |
| 103 | |
| 104 static bool isws(const char s[]) | |
| 105 { | |
| 106 for (; *s; s++) | |
| 107 if (!isspace(*s)) | |
| 108 return false; | |
| 109 return true; | |
| 110 } | |
| 111 | |
| 112 static void XMLCALL text_proc(void* data, const char* text, int len) | |
| 113 { | |
| 114 Data* p = (Data*)data; | |
| 115 SkXMLPullParser::Curr* c = p->fCurr; | |
| 116 | |
| 117 c->fName = dupstr(p->fAlloc, text, len); | |
| 118 c->fIsWhitespace = isws(c->fName); | |
| 119 | |
| 120 c->fEventType = SkXMLPullParser::TEXT; | |
| 121 XML_StopParser(p->fParser, true); | |
| 122 } | |
| 123 | |
| 124 ////////////////////////////////////////////////////////////////////////// | |
| 125 | |
| 126 struct SkXMLPullParser::Impl { | |
| 127 Data fData; | |
| 128 void* fBuffer; | |
| 129 size_t fBufferLen; | |
| 130 }; | |
| 131 | |
| 132 static void reportError(XML_Parser parser) | |
| 133 { | |
| 134 XML_Error code = XML_GetErrorCode(parser); | |
| 135 int lineNumber = XML_GetCurrentLineNumber(parser); | |
| 136 const char* msg = XML_ErrorString(code); | |
| 137 | |
| 138 printf("-------- XML error [%d] on line %d, %s\n", code, lineNumber, msg); | |
| 139 } | |
| 140 | |
| 141 bool SkXMLPullParser::onInit() | |
| 142 { | |
| 143 fImpl = new Impl; | |
| 144 | |
| 145 XML_Parser p = XML_ParserCreate(NULL); | |
| 146 SkASSERT(p); | |
| 147 | |
| 148 fImpl->fData.fParser = p; | |
| 149 fImpl->fData.fCurr = &fCurr; | |
| 150 | |
| 151 XML_SetElementHandler(p, start_proc, end_proc); | |
| 152 XML_SetCharacterDataHandler(p, text_proc); | |
| 153 XML_SetUserData(p, &fImpl->fData); | |
| 154 | |
| 155 size_t len = fStream->getLength(); | |
| 156 fImpl->fBufferLen = len; | |
| 157 fImpl->fBuffer = sk_malloc_throw(len); | |
| 158 fStream->rewind(); | |
| 159 size_t len2 = fStream->read(fImpl->fBuffer, len); | |
| 160 return len2 == len; | |
| 161 } | |
| 162 | |
| 163 void SkXMLPullParser::onExit() | |
| 164 { | |
| 165 sk_free(fImpl->fBuffer); | |
| 166 XML_ParserFree(fImpl->fData.fParser); | |
| 167 delete fImpl; | |
| 168 fImpl = NULL; | |
| 169 } | |
| 170 | |
| 171 SkXMLPullParser::EventType SkXMLPullParser::onNextToken() | |
| 172 { | |
| 173 if (Data::RETURN_END_TAG == fImpl->fData.fState) | |
| 174 { | |
| 175 fImpl->fData.fState = Data::NORMAL; | |
| 176 fCurr.fName = fImpl->fData.fEndTag; // restore name from (below) save | |
| 177 return SkXMLPullParser::END_TAG; | |
| 178 } | |
| 179 | |
| 180 fImpl->fData.fAlloc.reset(); | |
| 181 | |
| 182 XML_Parser p = fImpl->fData.fParser; | |
| 183 XML_Status status; | |
| 184 | |
| 185 status = XML_ResumeParser(p); | |
| 186 | |
| 187 CHECK_STATUS: | |
| 188 switch (status) { | |
| 189 case XML_STATUS_OK: | |
| 190 return SkXMLPullParser::END_DOCUMENT; | |
| 191 | |
| 192 case XML_STATUS_ERROR: | |
| 193 if (XML_GetErrorCode(p) != XML_ERROR_NOT_SUSPENDED) | |
| 194 { | |
| 195 reportError(p); | |
| 196 return SkXMLPullParser::ERROR; | |
| 197 } | |
| 198 status = XML_Parse(p, (const char*)fImpl->fBuffer, fImpl->fBufferLen, true); | |
| 199 goto CHECK_STATUS; | |
| 200 | |
| 201 case XML_STATUS_SUSPENDED: | |
| 202 if (Data::MISSED_START_TAG == fImpl->fData.fState) | |
| 203 { | |
| 204 // return a start_tag, and clear the flag so we return end_tag next | |
| 205 SkASSERT(SkXMLPullParser::END_TAG == fCurr.fEventType); | |
| 206 fImpl->fData.fState = Data::RETURN_END_TAG; | |
| 207 fImpl->fData.fEndTag = fCurr.fName; // save this pointer | |
| 208 return SkXMLPullParser::START_TAG; | |
| 209 } | |
| 210 break; | |
| 211 } | |
| 212 return fCurr.fEventType; | |
| 213 } |
