Add skia to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@16 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 222 insertions, 0 deletions

diff --git a/skia/ports/SkXMLPullParser_expat.cpp b/skia/ports/SkXMLPullParser_expat.cpp
new file mode 100644
index 0000000..cd29a9e
--- /dev/null
+++ b/skia/ports/SkXMLPullParser_expat.cpp
@@ -0,0 +1,222 @@
+/* libs/graphics/ports/SkXMLParser_expat.cpp
+**
+** Copyright 2006, Google Inc.
+**
+** Licensed under the Apache License, Version 2.0 (the "License"); 
+** you may not use this file except in compliance with the License. 
+** You may obtain a copy of the License at 
+**
+**     http://www.apache.org/licenses/LICENSE-2.0 
+**
+** Unless required by applicable law or agreed to in writing, software 
+** distributed under the License is distributed on an "AS IS" BASIS, 
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+** See the License for the specific language governing permissions and 
+** limitations under the License.
+*/
+
+#include "SkXMLParser.h"
+#include "SkChunkAlloc.h"
+#include "SkString.h"
+#include "SkStream.h"
+
+#include "expat.h"
+
+static inline char* dupstr(SkChunkAlloc& chunk, const char src[], size_t len)
+{
+    SkASSERT(src);
+    char*   dst = (char*)chunk.alloc(len + 1, SkChunkAlloc::kThrow_AllocFailType);
+    
+    memcpy(dst, src, len);    
+    dst[len] = 0;
+    return dst;
+}
+
+static inline int count_pairs(const char** p)
+{
+    const char** start = p;
+    while (*p)
+    {
+        SkASSERT(p[1] != NULL);
+        p += 2;
+    }
+    return (p - start) >> 1;
+}
+
+struct Data {
+    Data() : fAlloc(2048), fState(NORMAL) {}
+    
+    XML_Parser              fParser;
+    SkXMLPullParser::Curr*  fCurr;
+    SkChunkAlloc            fAlloc;
+    
+    enum State {
+        NORMAL,
+        MISSED_START_TAG,
+        RETURN_END_TAG
+    };
+    State fState;
+    const char* fEndTag;    // if state is RETURN_END_TAG
+};
+
+static void XMLCALL start_proc(void *data, const char *el, const char **attr)
+{
+    Data*                   p = (Data*)data;
+    SkXMLPullParser::Curr*  c = p->fCurr;
+    SkChunkAlloc&           alloc = p->fAlloc;
+
+    c->fName = dupstr(alloc, el, strlen(el));
+    
+    int n = count_pairs(attr);
+    SkXMLPullParser::AttrInfo* info = (SkXMLPullParser::AttrInfo*)alloc.alloc(n * sizeof(SkXMLPullParser::AttrInfo),
+                                                                              SkChunkAlloc::kThrow_AllocFailType);
+    c->fAttrInfoCount = n;
+    c->fAttrInfos = info;
+
+    for (int i = 0; i < n; i++)
+    {
+        info[i].fName = dupstr(alloc, attr[0], strlen(attr[0]));
+        info[i].fValue = dupstr(alloc, attr[1], strlen(attr[1]));
+        attr += 2;
+    }
+
+    c->fEventType = SkXMLPullParser::START_TAG;
+    XML_StopParser(p->fParser, true);
+}
+
+static void XMLCALL end_proc(void *data, const char *el)
+{
+    Data*                   p = (Data*)data;
+    SkXMLPullParser::Curr*  c = p->fCurr;
+
+    if (c->fEventType == SkXMLPullParser::START_TAG)
+    {
+        /*  if we get here, we were called with a start_tag immediately
+            followed by this end_tag. The caller will only see the end_tag,
+            so we set a flag to notify them of the missed start_tag
+        */
+        p->fState = Data::MISSED_START_TAG;
+        
+        SkASSERT(c->fName != NULL);
+        SkASSERT(strcmp(c->fName, el) == 0);
+    }
+    else
+        c->fName = dupstr(p->fAlloc, el, strlen(el));
+
+    c->fEventType = SkXMLPullParser::END_TAG;
+    XML_StopParser(p->fParser, true);
+}
+
+#include <ctype.h>
+
+static bool isws(const char s[])
+{
+    for (; *s; s++)
+        if (!isspace(*s))
+            return false;
+    return true;
+}
+
+static void XMLCALL text_proc(void* data, const char* text, int len)
+{
+    Data*                   p = (Data*)data;
+    SkXMLPullParser::Curr*  c = p->fCurr;
+
+    c->fName = dupstr(p->fAlloc, text, len);
+    c->fIsWhitespace = isws(c->fName);
+
+    c->fEventType = SkXMLPullParser::TEXT;
+    XML_StopParser(p->fParser, true);
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+struct SkXMLPullParser::Impl {
+    Data    fData;
+    void*   fBuffer;
+    size_t  fBufferLen;
+};
+
+static void reportError(XML_Parser parser)
+{
+    XML_Error code = XML_GetErrorCode(parser);
+    int lineNumber = XML_GetCurrentLineNumber(parser);
+    const char* msg = XML_ErrorString(code);
+    
+    printf("-------- XML error [%d] on line %d, %s\n", code, lineNumber, msg);
+}
+
+bool SkXMLPullParser::onInit()
+{
+    fImpl = new Impl;
+
+    XML_Parser p = XML_ParserCreate(NULL);
+    SkASSERT(p);
+
+    fImpl->fData.fParser = p;
+    fImpl->fData.fCurr = &fCurr;
+
+    XML_SetElementHandler(p, start_proc, end_proc);
+    XML_SetCharacterDataHandler(p, text_proc);
+    XML_SetUserData(p, &fImpl->fData);
+
+    size_t len = fStream->read(NULL, 0);
+    fImpl->fBufferLen = len;
+    fImpl->fBuffer = sk_malloc_throw(len);
+    fStream->rewind();
+    size_t  len2 = fStream->read(fImpl->fBuffer, len);
+    return len2 == len;
+}
+
+void SkXMLPullParser::onExit()
+{
+    sk_free(fImpl->fBuffer);
+    XML_ParserFree(fImpl->fData.fParser);
+    delete fImpl;
+    fImpl = NULL;
+}
+
+SkXMLPullParser::EventType SkXMLPullParser::onNextToken()
+{
+    if (Data::RETURN_END_TAG == fImpl->fData.fState)
+    {
+        fImpl->fData.fState = Data::NORMAL;
+        fCurr.fName = fImpl->fData.fEndTag; // restore name from (below) save
+        return SkXMLPullParser::END_TAG;
+    }
+
+    fImpl->fData.fAlloc.reuse();
+
+    XML_Parser p = fImpl->fData.fParser;
+    XML_Status status;
+
+    status = XML_ResumeParser(p);
+    
+CHECK_STATUS:
+    switch (status) {
+    case XML_STATUS_OK:
+        return SkXMLPullParser::END_DOCUMENT;
+
+    case XML_STATUS_ERROR:
+        if (XML_GetErrorCode(p) != XML_ERROR_NOT_SUSPENDED)
+        {
+            reportError(p);
+            return SkXMLPullParser::ERROR;
+        }
+        status = XML_Parse(p, (const char*)fImpl->fBuffer, fImpl->fBufferLen, true);
+        goto CHECK_STATUS;
+
+    case XML_STATUS_SUSPENDED:
+        if (Data::MISSED_START_TAG == fImpl->fData.fState)
+        {
+            // return a start_tag, and clear the flag so we return end_tag next
+            SkASSERT(SkXMLPullParser::END_TAG == fCurr.fEventType);
+            fImpl->fData.fState = Data::RETURN_END_TAG;
+            fImpl->fData.fEndTag = fCurr.fName;  // save this pointer            
+            return SkXMLPullParser::START_TAG;
+        }
+        break;
+    }
+    return fCurr.fEventType;
+}
+