3 * Copyright 2006 The Android Open Source Project
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
10 #include "SkXMLParser.h"
11 #include "SkChunkAlloc.h"
17 static inline char* dupstr(SkChunkAlloc& chunk, const char src[], size_t len)
20 char* dst = (char*)chunk.alloc(len + 1, SkChunkAlloc::kThrow_AllocFailType);
22 memcpy(dst, src, len);
27 static inline int count_pairs(const char** p)
29 const char** start = p;
32 SkASSERT(p[1] != NULL);
35 return (p - start) >> 1;
39 Data() : fAlloc(2048), fState(NORMAL) {}
42 SkXMLPullParser::Curr* fCurr;
51 const char* fEndTag; // if state is RETURN_END_TAG
54 static void XMLCALL start_proc(void *data, const char *el, const char **attr)
56 Data* p = (Data*)data;
57 SkXMLPullParser::Curr* c = p->fCurr;
58 SkChunkAlloc& alloc = p->fAlloc;
60 c->fName = dupstr(alloc, el, strlen(el));
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;
68 for (int i = 0; i < n; i++)
70 info[i].fName = dupstr(alloc, attr[0], strlen(attr[0]));
71 info[i].fValue = dupstr(alloc, attr[1], strlen(attr[1]));
75 c->fEventType = SkXMLPullParser::START_TAG;
76 XML_StopParser(p->fParser, true);
79 static void XMLCALL end_proc(void *data, const char *el)
81 Data* p = (Data*)data;
82 SkXMLPullParser::Curr* c = p->fCurr;
84 if (c->fEventType == SkXMLPullParser::START_TAG)
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
90 p->fState = Data::MISSED_START_TAG;
92 SkASSERT(c->fName != NULL);
93 SkASSERT(strcmp(c->fName, el) == 0);
96 c->fName = dupstr(p->fAlloc, el, strlen(el));
98 c->fEventType = SkXMLPullParser::END_TAG;
99 XML_StopParser(p->fParser, true);
104 static bool isws(const char s[])
112 static void XMLCALL text_proc(void* data, const char* text, int len)
114 Data* p = (Data*)data;
115 SkXMLPullParser::Curr* c = p->fCurr;
117 c->fName = dupstr(p->fAlloc, text, len);
118 c->fIsWhitespace = isws(c->fName);
120 c->fEventType = SkXMLPullParser::TEXT;
121 XML_StopParser(p->fParser, true);
124 //////////////////////////////////////////////////////////////////////////
126 struct SkXMLPullParser::Impl {
132 static void reportError(XML_Parser parser)
134 XML_Error code = XML_GetErrorCode(parser);
135 int lineNumber = XML_GetCurrentLineNumber(parser);
136 const char* msg = XML_ErrorString(code);
138 printf("-------- XML error [%d] on line %d, %s\n", code, lineNumber, msg);
141 bool SkXMLPullParser::onInit()
145 XML_Parser p = XML_ParserCreate(NULL);
148 fImpl->fData.fParser = p;
149 fImpl->fData.fCurr = &fCurr;
151 XML_SetElementHandler(p, start_proc, end_proc);
152 XML_SetCharacterDataHandler(p, text_proc);
153 XML_SetUserData(p, &fImpl->fData);
155 size_t len = fStream->getLength();
156 fImpl->fBufferLen = len;
157 fImpl->fBuffer = sk_malloc_throw(len);
159 size_t len2 = fStream->read(fImpl->fBuffer, len);
163 void SkXMLPullParser::onExit()
165 sk_free(fImpl->fBuffer);
166 XML_ParserFree(fImpl->fData.fParser);
171 SkXMLPullParser::EventType SkXMLPullParser::onNextToken()
173 if (Data::RETURN_END_TAG == fImpl->fData.fState)
175 fImpl->fData.fState = Data::NORMAL;
176 fCurr.fName = fImpl->fData.fEndTag; // restore name from (below) save
177 return SkXMLPullParser::END_TAG;
180 fImpl->fData.fAlloc.reset();
182 XML_Parser p = fImpl->fData.fParser;
185 status = XML_ResumeParser(p);
190 return SkXMLPullParser::END_DOCUMENT;
192 case XML_STATUS_ERROR:
193 if (XML_GetErrorCode(p) != XML_ERROR_NOT_SUSPENDED)
196 return SkXMLPullParser::ERROR;
198 status = XML_Parse(p, (const char*)fImpl->fBuffer, fImpl->fBufferLen, true);
201 case XML_STATUS_SUSPENDED:
202 if (Data::MISSED_START_TAG == fImpl->fData.fState)
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;
212 return fCurr.fEventType;