1// Copyright 2013 Google Inc. All Rights Reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14//
15// Helper functions for storing integer values into byte streams.
16// No bounds checking is performed, that is the responsibility of the caller.
17
18#ifndef WOFF2_STORE_BYTES_H_
19#define WOFF2_STORE_BYTES_H_
20
21#include <inttypes.h>
22#include <stddef.h>
23#include <string.h>
24
25namespace woff2 {
26
27inline size_t StoreU32(uint8_t* dst, size_t offset, uint32_t x) {
28  dst[offset] = x >> 24;
29  dst[offset + 1] = x >> 16;
30  dst[offset + 2] = x >> 8;
31  dst[offset + 3] = x;
32  return offset + 4;
33}
34
35inline size_t Store16(uint8_t* dst, size_t offset, int x) {
36  dst[offset] = x >> 8;
37  dst[offset + 1] = x;
38  return offset + 2;
39}
40
41inline void StoreU32(uint32_t val, size_t* offset, uint8_t* dst) {
42  dst[(*offset)++] = val >> 24;
43  dst[(*offset)++] = val >> 16;
44  dst[(*offset)++] = val >> 8;
45  dst[(*offset)++] = val;
46}
47
48inline void Store16(int val, size_t* offset, uint8_t* dst) {
49  dst[(*offset)++] = val >> 8;
50  dst[(*offset)++] = val;
51}
52
53inline void StoreBytes(const uint8_t* data, size_t len,
54                       size_t* offset, uint8_t* dst) {
55  memcpy(&dst[*offset], data, len);
56  *offset += len;
57}
58
59} // namespace woff2
60
61#endif  // WOFF2_STORE_BYTES_H_
62