1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 // 5 // A wrapper around ZLib's CRC functions to put them in the rlz_lib namespace 6 // and use our types. 7 8 #include "rlz/lib/assert.h" 9 #include "rlz/lib/crc32.h" 10 #include "rlz/lib/string_utils.h" 11 #include "third_party/zlib/zlib.h" 12 13 namespace rlz_lib { 14 15 int Crc32(const unsigned char* buf, int length) { 16 return crc32(0L, buf, length); 17 } 18 19 bool Crc32(const char* text, int* crc) { 20 if (!crc) { 21 ASSERT_STRING("Crc32: crc is NULL."); 22 return false; 23 } 24 25 *crc = 0; 26 for (int i = 0; text[i]; i++) { 27 if (!IsAscii(text[i])) 28 return false; 29 30 *crc = crc32(*crc, reinterpret_cast<const unsigned char*>(text + i), 1); 31 } 32 33 return true; 34 } 35 36 } // namespace rlz_lib 37
