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
21#include "sfntly/data/memory_byte_array.h"
22#include "sfntly/data/growable_memory_byte_array.h"
23
24namespace sfntly {
25
26WritableFontData::WritableFontData(ByteArray* ba) : ReadableFontData(ba) {
27}
28
29WritableFontData::~WritableFontData() {}
30
31// static
32CALLER_ATTACH
33WritableFontData* WritableFontData::CreateWritableFontData(int32_t length) {
34  ByteArrayPtr ba;
35  if (length > 0) {
36    ba = new MemoryByteArray(length);
37    ba->SetFilledLength(length);
38  } else {
39    ba = new GrowableMemoryByteArray();
40  }
41  WritableFontDataPtr wfd = new WritableFontData(ba);
42  return wfd.Detach();
43}
44
45// TODO(arthurhsu): re-investigate the memory model of this function.  It's
46//                  not too useful without copying, but it's not performance
47//                  savvy to do copying.
48CALLER_ATTACH
49WritableFontData* WritableFontData::CreateWritableFontData(ByteVector* b) {
50  ByteArrayPtr ba = new GrowableMemoryByteArray();
51  ba->Put(0, b);
52  WritableFontDataPtr wfd = new WritableFontData(ba);
53  return wfd.Detach();
54}
55
56int32_t WritableFontData::WriteByte(int32_t index, byte_t b) {
57  array_->Put(BoundOffset(index), b);
58  return 1;
59}
60
61int32_t WritableFontData::WriteBytes(int32_t index,
62                                     byte_t* b,
63                                     int32_t offset,
64                                     int32_t length) {
65  return array_->Put(BoundOffset(index),
66                     b,
67                     offset,
68                     BoundLength(index, length));
69}
70
71int32_t WritableFontData::WriteBytes(int32_t index, ByteVector* b) {
72  assert(b);
73  return WriteBytes(index, &((*b)[0]), 0, b->size());
74}
75
76int32_t WritableFontData::WriteBytesPad(int32_t index,
77                                        ByteVector* b,
78                                        int32_t offset,
79                                        int32_t length,
80                                        byte_t pad) {
81  int32_t written =
82      array_->Put(BoundOffset(index),
83                  &((*b)[0]),
84                  offset,
85                  BoundLength(index,
86                              std::min<int32_t>(length, b->size() - offset)));
87  written += WritePadding(written + index, length - written, pad);
88  return written;
89}
90
91int32_t WritableFontData::WritePadding(int32_t index, int32_t count) {
92  return WritePadding(index, count, (byte_t)0);
93}
94
95int32_t WritableFontData::WritePadding(int32_t index, int32_t count,
96                                       byte_t pad) {
97  for (int32_t i = 0; i < count; ++i) {
98    array_->Put(index + i, pad);
99  }
100  return count;
101}
102
103int32_t WritableFontData::WriteChar(int32_t index, byte_t c) {
104  return WriteByte(index, c);
105}
106
107int32_t WritableFontData::WriteUShort(int32_t index, int32_t us) {
108  WriteByte(index, (byte_t)((us >> 8) & 0xff));
109  WriteByte(index + 1, (byte_t)(us & 0xff));
110  return 2;
111}
112
113int32_t WritableFontData::WriteUShortLE(int32_t index, int32_t us) {
114  WriteByte(index, (byte_t)(us & 0xff));
115  WriteByte(index + 1, (byte_t)((us >> 8) & 0xff));
116  return 2;
117}
118
119int32_t WritableFontData::WriteShort(int32_t index, int32_t s) {
120  return WriteUShort(index, s);
121}
122
123int32_t WritableFontData::WriteUInt24(int32_t index, int32_t ui) {
124  WriteByte(index, (byte_t)((ui >> 16) & 0xff));
125  WriteByte(index + 1, (byte_t)((ui >> 8) & 0xff));
126  WriteByte(index + 2, (byte_t)(ui & 0xff));
127  return 3;
128}
129
130int32_t WritableFontData::WriteULong(int32_t index, int64_t ul) {
131  WriteByte(index, (byte_t)((ul >> 24) & 0xff));
132  WriteByte(index + 1, (byte_t)((ul >> 16) & 0xff));
133  WriteByte(index + 2, (byte_t)((ul >> 8) & 0xff));
134  WriteByte(index + 3, (byte_t)(ul & 0xff));
135  return 4;
136}
137
138int32_t WritableFontData::WriteULongLE(int32_t index, int64_t ul) {
139  WriteByte(index, (byte_t)(ul & 0xff));
140  WriteByte(index + 1, (byte_t)((ul >> 8) & 0xff));
141  WriteByte(index + 2, (byte_t)((ul >> 16) & 0xff));
142  WriteByte(index + 3, (byte_t)((ul >> 24) & 0xff));
143  return 4;
144}
145
146int32_t WritableFontData::WriteLong(int32_t index, int64_t l) {
147  return WriteULong(index, l);
148}
149
150int32_t WritableFontData::WriteFixed(int32_t index, int32_t f) {
151  return WriteLong(index, f);
152}
153
154int32_t WritableFontData::WriteDateTime(int32_t index, int64_t date) {
155  WriteULong(index, (date >> 32) & 0xffffffff);
156  WriteULong(index + 4, date & 0xffffffff);
157  return 8;
158}
159
160void WritableFontData::CopyFrom(InputStream* is, int32_t length) {
161  array_->CopyFrom(is, length);
162}
163
164void WritableFontData::CopyFrom(InputStream* is) {
165  array_->CopyFrom(is);
166}
167
168CALLER_ATTACH FontData* WritableFontData::Slice(int32_t offset,
169                                                int32_t length) {
170  if (offset < 0 || offset + length > Size()) {
171#if !defined (SFNTLY_NO_EXCEPTION)
172    throw IndexOutOfBoundsException(
173        "Attempt to bind data outside of its limits");
174#endif
175    return NULL;
176  }
177  FontDataPtr slice = new WritableFontData(this, offset, length);
178  return slice.Detach();
179}
180
181CALLER_ATTACH FontData* WritableFontData::Slice(int32_t offset) {
182  if (offset > Size()) {
183#if !defined (SFNTLY_NO_EXCEPTION)
184    throw IndexOutOfBoundsException(
185        "Attempt to bind data outside of its limits");
186#endif
187    return NULL;
188  }
189  FontDataPtr slice = new WritableFontData(this, offset);
190  return slice.Detach();
191}
192
193WritableFontData::WritableFontData(WritableFontData* data, int32_t offset)
194    : ReadableFontData(data, offset) {
195}
196
197WritableFontData::WritableFontData(WritableFontData* data,
198                                   int32_t offset,
199                                   int32_t length)
200    : ReadableFontData(data, offset, length) {
201}
202
203}  // namespace sfntly
204