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| 1 /* | |
| 2 * Copyright 2006 The Android Open Source Project | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 | |
| 8 | |
| 9 #include "SkBML_XMLParser.h" | |
| 10 #include "SkBML_Verbs.h" | |
| 11 #include "SkStream.h" | |
| 12 #include "SkXMLWriter.h" | |
| 13 | |
| 14 static uint8_t rbyte(SkStream& s) | |
| 15 { | |
| 16 uint8_t b; | |
| 17 SkDEBUGCODE(size_t size = ) s.read(&b, 1); | |
| 18 SkASSERT(size == 1); | |
| 19 return b; | |
| 20 } | |
| 21 | |
| 22 static int rdata(SkStream& s, int data) | |
| 23 { | |
| 24 SkASSERT((data & ~31) == 0); | |
| 25 if (data == 31) | |
| 26 { | |
| 27 data = rbyte(s); | |
| 28 if (data == 0xFF) | |
| 29 { | |
| 30 data = rbyte(s); | |
| 31 data = (data << 8) | rbyte(s); | |
| 32 } | |
| 33 } | |
| 34 return data; | |
| 35 } | |
| 36 | |
| 37 static void set(char* array[256], int index, SkStream& s, int data) | |
| 38 { | |
| 39 SkASSERT((unsigned)index <= 255); | |
| 40 | |
| 41 size_t size = rdata(s, data); | |
| 42 | |
| 43 if (array[index] == nullptr) | |
| 44 array[index] = (char*)sk_malloc_throw(size + 1); | |
| 45 else | |
| 46 { | |
| 47 if (strlen(array[index]) < size) | |
| 48 array[index] = (char*)sk_realloc_throw(array[index], size + 1); | |
| 49 } | |
| 50 | |
| 51 s.read(array[index], size); | |
| 52 array[index][size] = 0; | |
| 53 } | |
| 54 | |
| 55 static void freeAll(char* array[256]) | |
| 56 { | |
| 57 for (int i = 0; i < 256; i++) | |
| 58 sk_free(array[i]); | |
| 59 } | |
| 60 | |
| 61 struct BMLW { | |
| 62 char* fElems[256]; | |
| 63 char* fNames[256]; | |
| 64 char* fValues[256]; | |
| 65 | |
| 66 // important that these are uint8_t, so we get automatic wrap-around | |
| 67 uint8_t fNextElem, fNextName, fNextValue; | |
| 68 | |
| 69 BMLW() | |
| 70 { | |
| 71 memset(fElems, 0, sizeof(fElems)); | |
| 72 memset(fNames, 0, sizeof(fNames)); | |
| 73 memset(fValues, 0, sizeof(fValues)); | |
| 74 | |
| 75 fNextElem = fNextName = fNextValue = 0; | |
| 76 } | |
| 77 ~BMLW() | |
| 78 { | |
| 79 freeAll(fElems); | |
| 80 freeAll(fNames); | |
| 81 freeAll(fValues); | |
| 82 } | |
| 83 }; | |
| 84 | |
| 85 static void rattr(unsigned verb, SkStream& s, BMLW& rec, SkXMLWriter& writer) | |
| 86 { | |
| 87 int data = verb & 31; | |
| 88 verb >>= 5; | |
| 89 | |
| 90 int nameIndex, valueIndex; | |
| 91 | |
| 92 switch (verb) { | |
| 93 case kAttr_Value_Value_Verb: | |
| 94 nameIndex = rec.fNextName; // record before the ++ | |
| 95 set(rec.fNames, rec.fNextName++, s, data); | |
| 96 valueIndex = rec.fNextValue; // record before the ++ | |
| 97 set(rec.fValues, rec.fNextValue++, s, 31); | |
| 98 break; | |
| 99 case kAttr_Value_Index_Verb: | |
| 100 nameIndex = rec.fNextName; // record before the ++ | |
| 101 set(rec.fNames, rec.fNextName++, s, data); | |
| 102 valueIndex = rbyte(s); | |
| 103 break; | |
| 104 case kAttr_Index_Value_Verb: | |
| 105 nameIndex = rdata(s, data); | |
| 106 valueIndex = rec.fNextValue; // record before the ++ | |
| 107 set(rec.fValues, rec.fNextValue++, s, 31); | |
| 108 break; | |
| 109 case kAttr_Index_Index_Verb: | |
| 110 nameIndex = rdata(s, data); | |
| 111 valueIndex = rbyte(s); | |
| 112 break; | |
| 113 default: | |
| 114 SkDEBUGFAIL("bad verb"); | |
| 115 return; | |
| 116 } | |
| 117 writer.addAttribute(rec.fNames[nameIndex], rec.fValues[valueIndex]); | |
| 118 } | |
| 119 | |
| 120 static void relem(unsigned verb, SkStream& s, BMLW& rec, SkXMLWriter& writer) | |
| 121 { | |
| 122 int data = verb & 31; | |
| 123 verb >>= 5; | |
| 124 | |
| 125 int elemIndex; | |
| 126 | |
| 127 if (verb == kStartElem_Value_Verb) | |
| 128 { | |
| 129 elemIndex = rec.fNextElem; // record before the ++ | |
| 130 set(rec.fElems, rec.fNextElem++, s, data); | |
| 131 } | |
| 132 else | |
| 133 { | |
| 134 SkASSERT(verb == kStartElem_Index_Verb); | |
| 135 elemIndex = rdata(s, data); | |
| 136 } | |
| 137 | |
| 138 writer.startElement(rec.fElems[elemIndex]); | |
| 139 | |
| 140 for (;;) | |
| 141 { | |
| 142 verb = rbyte(s); | |
| 143 switch (verb >> 5) { | |
| 144 case kAttr_Value_Value_Verb: | |
| 145 case kAttr_Value_Index_Verb: | |
| 146 case kAttr_Index_Value_Verb: | |
| 147 case kAttr_Index_Index_Verb: | |
| 148 rattr(verb, s, rec, writer); | |
| 149 break; | |
| 150 case kStartElem_Value_Verb: | |
| 151 case kStartElem_Index_Verb: | |
| 152 relem(verb, s, rec, writer); | |
| 153 break; | |
| 154 case kEndElem_Verb: | |
| 155 writer.endElement(); | |
| 156 return; | |
| 157 default: | |
| 158 SkDEBUGFAIL("bad verb"); | |
| 159 } | |
| 160 } | |
| 161 } | |
| 162 | |
| 163 void BML_XMLParser::Read(SkStream& s, SkXMLWriter& writer) | |
| 164 { | |
| 165 BMLW rec; | |
| 166 writer.writeHeader(); | |
| 167 relem(rbyte(s), s, rec, writer); | |
| 168 } | |
| 169 | |
| 170 void BML_XMLParser::Read(SkStream& s, SkWStream& output) | |
| 171 { | |
| 172 SkXMLStreamWriter writer(&output); | |
| 173 Read(s, writer); | |
| 174 } | |
| 175 | |
| 176 void BML_XMLParser::Read(SkStream& s, SkXMLParser& output) | |
| 177 { | |
| 178 SkXMLParserWriter writer(&output); | |
| 179 Read(s, writer); | |
| 180 } | |
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Chromium Code Reviews
Issue 1868423002:
remove unused BML (binary xml) code (Closed)
Base URL: https://skia.googlesource.com/skia.git@master