1 /*
2 * Copyright 2011 Google Inc. All Rights Reserved.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "sfntly/data/writable_font_data.h"
18
19 #include <algorithm>
20 #include <limits>
21
22 #include "sfntly/data/memory_byte_array.h"
23 #include "sfntly/data/growable_memory_byte_array.h"
24
25 namespace sfntly {
26
WritableFontData(ByteArray * ba)27 WritableFontData::WritableFontData(ByteArray* ba) : ReadableFontData(ba) {
28 }
29
~WritableFontData()30 WritableFontData::~WritableFontData() {}
31
32 // static
33 CALLER_ATTACH
CreateWritableFontData(int32_t length)34 WritableFontData* WritableFontData::CreateWritableFontData(int32_t length) {
35 ByteArrayPtr ba;
36 if (length > 0) {
37 ba = new MemoryByteArray(length);
38 ba->SetFilledLength(length);
39 } else {
40 ba = new GrowableMemoryByteArray();
41 }
42 WritableFontDataPtr wfd = new WritableFontData(ba);
43 return wfd.Detach();
44 }
45
46 // TODO(arthurhsu): re-investigate the memory model of this function. It's
47 // not too useful without copying, but it's not performance
48 // savvy to do copying.
49 CALLER_ATTACH
CreateWritableFontData(ByteVector * b)50 WritableFontData* WritableFontData::CreateWritableFontData(ByteVector* b) {
51 ByteArrayPtr ba = new GrowableMemoryByteArray();
52 ba->Put(0, b);
53 WritableFontDataPtr wfd = new WritableFontData(ba);
54 return wfd.Detach();
55 }
56
WriteByte(int32_t index,byte_t b)57 int32_t WritableFontData::WriteByte(int32_t index, byte_t b) {
58 array_->Put(BoundOffset(index), b);
59 return 1;
60 }
61
WriteBytes(int32_t index,byte_t * b,int32_t offset,int32_t length)62 int32_t WritableFontData::WriteBytes(int32_t index,
63 byte_t* b,
64 int32_t offset,
65 int32_t length) {
66 return array_->Put(BoundOffset(index),
67 b,
68 offset,
69 BoundLength(index, length));
70 }
71
WriteBytes(int32_t index,ByteVector * b)72 int32_t WritableFontData::WriteBytes(int32_t index, ByteVector* b) {
73 assert(b);
74 return WriteBytes(index, &((*b)[0]), 0, b->size());
75 }
76
WriteBytesPad(int32_t index,ByteVector * b,int32_t offset,int32_t length,byte_t pad)77 int32_t WritableFontData::WriteBytesPad(int32_t index,
78 ByteVector* b,
79 int32_t offset,
80 int32_t length,
81 byte_t pad) {
82 int32_t written =
83 array_->Put(BoundOffset(index),
84 &((*b)[0]),
85 offset,
86 BoundLength(index,
87 std::min<int32_t>(length, b->size() - offset)));
88 written += WritePadding(written + index, length - written, pad);
89 return written;
90 }
91
WritePadding(int32_t index,int32_t count)92 int32_t WritableFontData::WritePadding(int32_t index, int32_t count) {
93 return WritePadding(index, count, (byte_t)0);
94 }
95
WritePadding(int32_t index,int32_t count,byte_t pad)96 int32_t WritableFontData::WritePadding(int32_t index, int32_t count,
97 byte_t pad) {
98 for (int32_t i = 0; i < count; ++i) {
99 array_->Put(index + i, pad);
100 }
101 return count;
102 }
103
WriteChar(int32_t index,byte_t c)104 int32_t WritableFontData::WriteChar(int32_t index, byte_t c) {
105 return WriteByte(index, c);
106 }
107
WriteUShort(int32_t index,int32_t us)108 int32_t WritableFontData::WriteUShort(int32_t index, int32_t us) {
109 WriteByte(index, (byte_t)((us >> 8) & 0xff));
110 WriteByte(index + 1, (byte_t)(us & 0xff));
111 return 2;
112 }
113
WriteUShortLE(int32_t index,int32_t us)114 int32_t WritableFontData::WriteUShortLE(int32_t index, int32_t us) {
115 WriteByte(index, (byte_t)(us & 0xff));
116 WriteByte(index + 1, (byte_t)((us >> 8) & 0xff));
117 return 2;
118 }
119
WriteShort(int32_t index,int32_t s)120 int32_t WritableFontData::WriteShort(int32_t index, int32_t s) {
121 return WriteUShort(index, s);
122 }
123
WriteUInt24(int32_t index,int32_t ui)124 int32_t WritableFontData::WriteUInt24(int32_t index, int32_t ui) {
125 WriteByte(index, (byte_t)((ui >> 16) & 0xff));
126 WriteByte(index + 1, (byte_t)((ui >> 8) & 0xff));
127 WriteByte(index + 2, (byte_t)(ui & 0xff));
128 return 3;
129 }
130
WriteULong(int32_t index,int64_t ul)131 int32_t WritableFontData::WriteULong(int32_t index, int64_t ul) {
132 WriteByte(index, (byte_t)((ul >> 24) & 0xff));
133 WriteByte(index + 1, (byte_t)((ul >> 16) & 0xff));
134 WriteByte(index + 2, (byte_t)((ul >> 8) & 0xff));
135 WriteByte(index + 3, (byte_t)(ul & 0xff));
136 return 4;
137 }
138
WriteULongLE(int32_t index,int64_t ul)139 int32_t WritableFontData::WriteULongLE(int32_t index, int64_t ul) {
140 WriteByte(index, (byte_t)(ul & 0xff));
141 WriteByte(index + 1, (byte_t)((ul >> 8) & 0xff));
142 WriteByte(index + 2, (byte_t)((ul >> 16) & 0xff));
143 WriteByte(index + 3, (byte_t)((ul >> 24) & 0xff));
144 return 4;
145 }
146
WriteLong(int32_t index,int64_t l)147 int32_t WritableFontData::WriteLong(int32_t index, int64_t l) {
148 return WriteULong(index, l);
149 }
150
WriteFixed(int32_t index,int32_t f)151 int32_t WritableFontData::WriteFixed(int32_t index, int32_t f) {
152 return WriteLong(index, f);
153 }
154
WriteDateTime(int32_t index,int64_t date)155 int32_t WritableFontData::WriteDateTime(int32_t index, int64_t date) {
156 WriteULong(index, (date >> 32) & 0xffffffff);
157 WriteULong(index + 4, date & 0xffffffff);
158 return 8;
159 }
160
CopyFrom(InputStream * is,int32_t length)161 void WritableFontData::CopyFrom(InputStream* is, int32_t length) {
162 array_->CopyFrom(is, length);
163 }
164
CopyFrom(InputStream * is)165 void WritableFontData::CopyFrom(InputStream* is) {
166 array_->CopyFrom(is);
167 }
168
Slice(int32_t offset,int32_t length)169 CALLER_ATTACH FontData* WritableFontData::Slice(int32_t offset,
170 int32_t length) {
171 if (offset < 0 || length < 0 ||
172 offset > std::numeric_limits<int32_t>::max() - length ||
173 offset + length > Size()) {
174 #if !defined (SFNTLY_NO_EXCEPTION)
175 throw IndexOutOfBoundsException(
176 "Attempt to bind data outside of its limits");
177 #endif
178 return NULL;
179 }
180 FontDataPtr slice = new WritableFontData(this, offset, length);
181 return slice.Detach();
182 }
183
Slice(int32_t offset)184 CALLER_ATTACH FontData* WritableFontData::Slice(int32_t offset) {
185 if (offset < 0 || offset > Size()) {
186 #if !defined (SFNTLY_NO_EXCEPTION)
187 throw IndexOutOfBoundsException(
188 "Attempt to bind data outside of its limits");
189 #endif
190 return NULL;
191 }
192 FontDataPtr slice = new WritableFontData(this, offset);
193 return slice.Detach();
194 }
195
WritableFontData(WritableFontData * data,int32_t offset)196 WritableFontData::WritableFontData(WritableFontData* data, int32_t offset)
197 : ReadableFontData(data, offset) {
198 }
199
WritableFontData(WritableFontData * data,int32_t offset,int32_t length)200 WritableFontData::WritableFontData(WritableFontData* data,
201 int32_t offset,
202 int32_t length)
203 : ReadableFontData(data, offset, length) {
204 }
205
206 } // namespace sfntly
207