third_party/woff2/src/store_bytes.h

   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
  25 namespace woff2 {
  26
  27 inline 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
  35 inline 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
  41 inline 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
  48 inline void Store16(int val, size_t* offset, uint8_t* dst) {
  49   dst[(*offset)++] = val >> 8;
  50   dst[(*offset)++] = val;
  51 }
  52
  53 inline 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_