1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/xml/SkBML_XMLParser.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,181 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2006 The Android Open Source Project
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#include "SkBML_XMLParser.h"
1.14 +#include "SkBML_Verbs.h"
1.15 +#include "SkStream.h"
1.16 +#include "SkXMLWriter.h"
1.17 +
1.18 +static uint8_t rbyte(SkStream& s)
1.19 +{
1.20 + uint8_t b;
1.21 + SkDEBUGCODE(size_t size = ) s.read(&b, 1);
1.22 + SkASSERT(size == 1);
1.23 + return b;
1.24 +}
1.25 +
1.26 +static int rdata(SkStream& s, int data)
1.27 +{
1.28 + SkASSERT((data & ~31) == 0);
1.29 + if (data == 31)
1.30 + {
1.31 + data = rbyte(s);
1.32 + if (data == 0xFF)
1.33 + {
1.34 + data = rbyte(s);
1.35 + data = (data << 8) | rbyte(s);
1.36 + }
1.37 + }
1.38 + return data;
1.39 +}
1.40 +
1.41 +static void set(char* array[256], int index, SkStream& s, int data)
1.42 +{
1.43 + SkASSERT((unsigned)index <= 255);
1.44 +
1.45 + size_t size = rdata(s, data);
1.46 +
1.47 + if (array[index] == NULL)
1.48 + array[index] = (char*)sk_malloc_throw(size + 1);
1.49 + else
1.50 + {
1.51 + if (strlen(array[index]) < size)
1.52 + array[index] = (char*)sk_realloc_throw(array[index], size + 1);
1.53 + }
1.54 +
1.55 + s.read(array[index], size);
1.56 + array[index][size] = 0;
1.57 +}
1.58 +
1.59 +static void freeAll(char* array[256])
1.60 +{
1.61 + for (int i = 0; i < 256; i++)
1.62 + sk_free(array[i]);
1.63 +}
1.64 +
1.65 +struct BMLW {
1.66 + char* fElems[256];
1.67 + char* fNames[256];
1.68 + char* fValues[256];
1.69 +
1.70 + // important that these are uint8_t, so we get automatic wrap-around
1.71 + uint8_t fNextElem, fNextName, fNextValue;
1.72 +
1.73 + BMLW()
1.74 + {
1.75 + memset(fElems, 0, sizeof(fElems));
1.76 + memset(fNames, 0, sizeof(fNames));
1.77 + memset(fValues, 0, sizeof(fValues));
1.78 +
1.79 + fNextElem = fNextName = fNextValue = 0;
1.80 + }
1.81 + ~BMLW()
1.82 + {
1.83 + freeAll(fElems);
1.84 + freeAll(fNames);
1.85 + freeAll(fValues);
1.86 + }
1.87 +};
1.88 +
1.89 +static void rattr(unsigned verb, SkStream& s, BMLW& rec, SkXMLWriter& writer)
1.90 +{
1.91 + int data = verb & 31;
1.92 + verb >>= 5;
1.93 +
1.94 + int nameIndex, valueIndex;
1.95 +
1.96 + switch (verb) {
1.97 + case kAttr_Value_Value_Verb:
1.98 + nameIndex = rec.fNextName; // record before the ++
1.99 + set(rec.fNames, rec.fNextName++, s, data);
1.100 + valueIndex = rec.fNextValue; // record before the ++
1.101 + set(rec.fValues, rec.fNextValue++, s, 31);
1.102 + break;
1.103 + case kAttr_Value_Index_Verb:
1.104 + nameIndex = rec.fNextName; // record before the ++
1.105 + set(rec.fNames, rec.fNextName++, s, data);
1.106 + valueIndex = rbyte(s);
1.107 + break;
1.108 + case kAttr_Index_Value_Verb:
1.109 + nameIndex = rdata(s, data);
1.110 + valueIndex = rec.fNextValue; // record before the ++
1.111 + set(rec.fValues, rec.fNextValue++, s, 31);
1.112 + break;
1.113 + case kAttr_Index_Index_Verb:
1.114 + nameIndex = rdata(s, data);
1.115 + valueIndex = rbyte(s);
1.116 + break;
1.117 + default:
1.118 + SkDEBUGFAIL("bad verb");
1.119 + return;
1.120 + }
1.121 + writer.addAttribute(rec.fNames[nameIndex], rec.fValues[valueIndex]);
1.122 +}
1.123 +
1.124 +static void relem(unsigned verb, SkStream& s, BMLW& rec, SkXMLWriter& writer)
1.125 +{
1.126 + int data = verb & 31;
1.127 + verb >>= 5;
1.128 +
1.129 + int elemIndex;
1.130 +
1.131 + if (verb == kStartElem_Value_Verb)
1.132 + {
1.133 + elemIndex = rec.fNextElem; // record before the ++
1.134 + set(rec.fElems, rec.fNextElem++, s, data);
1.135 + }
1.136 + else
1.137 + {
1.138 + SkASSERT(verb == kStartElem_Index_Verb);
1.139 + elemIndex = rdata(s, data);
1.140 + }
1.141 +
1.142 + writer.startElement(rec.fElems[elemIndex]);
1.143 +
1.144 + for (;;)
1.145 + {
1.146 + verb = rbyte(s);
1.147 + switch (verb >> 5) {
1.148 + case kAttr_Value_Value_Verb:
1.149 + case kAttr_Value_Index_Verb:
1.150 + case kAttr_Index_Value_Verb:
1.151 + case kAttr_Index_Index_Verb:
1.152 + rattr(verb, s, rec, writer);
1.153 + break;
1.154 + case kStartElem_Value_Verb:
1.155 + case kStartElem_Index_Verb:
1.156 + relem(verb, s, rec, writer);
1.157 + break;
1.158 + case kEndElem_Verb:
1.159 + writer.endElement();
1.160 + return;
1.161 + default:
1.162 + SkDEBUGFAIL("bad verb");
1.163 + }
1.164 + }
1.165 +}
1.166 +
1.167 +void BML_XMLParser::Read(SkStream& s, SkXMLWriter& writer)
1.168 +{
1.169 + BMLW rec;
1.170 + writer.writeHeader();
1.171 + relem(rbyte(s), s, rec, writer);
1.172 +}
1.173 +
1.174 +void BML_XMLParser::Read(SkStream& s, SkWStream& output)
1.175 +{
1.176 + SkXMLStreamWriter writer(&output);
1.177 + Read(s, writer);
1.178 +}
1.179 +
1.180 +void BML_XMLParser::Read(SkStream& s, SkXMLParser& output)
1.181 +{
1.182 + SkXMLParserWriter writer(&output);
1.183 + Read(s, writer);
1.184 +}
