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 <limits.h>
18 #include <algorithm>
19 #include <functional>
20
21 #include "sfntly/data/font_data.h"
22
23 namespace sfntly {
24
Size() const25 int32_t FontData::Size() const {
26 return std::min<int32_t>(array_->Size() - bound_offset_, bound_length_);
27 }
28
Bound(int32_t offset,int32_t length)29 bool FontData::Bound(int32_t offset, int32_t length) {
30 if (offset + length > Size() || offset < 0 || length < 0)
31 return false;
32
33 bound_offset_ += offset;
34 bound_length_ = length;
35 return true;
36 }
37
Bound(int32_t offset)38 bool FontData::Bound(int32_t offset) {
39 if (offset > Size() || offset < 0)
40 return false;
41
42 bound_offset_ += offset;
43 return true;
44 }
45
Length() const46 int32_t FontData::Length() const {
47 return std::min<int32_t>(array_->Length() - bound_offset_, bound_length_);
48 }
49
FontData(ByteArray * ba)50 FontData::FontData(ByteArray* ba) {
51 Init(ba);
52 }
53
FontData(FontData * data,int32_t offset,int32_t length)54 FontData::FontData(FontData* data, int32_t offset, int32_t length) {
55 Init(data->array_);
56 Bound(data->bound_offset_ + offset, length);
57 }
58
FontData(FontData * data,int32_t offset)59 FontData::FontData(FontData* data, int32_t offset) {
60 Init(data->array_);
61 Bound(data->bound_offset_ + offset,
62 (data->bound_length_ == GROWABLE_SIZE)
63 ? GROWABLE_SIZE : data->bound_length_ - offset);
64 }
65
~FontData()66 FontData::~FontData() {}
67
Init(ByteArray * ba)68 void FontData::Init(ByteArray* ba) {
69 array_ = ba;
70 bound_offset_ = 0;
71 bound_length_ = GROWABLE_SIZE;
72 }
73
BoundOffset(int32_t offset)74 int32_t FontData::BoundOffset(int32_t offset) {
75 return offset + bound_offset_;
76 }
77
BoundLength(int32_t offset,int32_t length)78 int32_t FontData::BoundLength(int32_t offset, int32_t length) {
79 return std::min<int32_t>(length, bound_length_ - offset);
80 }
81
82 } // namespace sfntly
83