Index: utils/cross/base64.cc |
=================================================================== |
--- utils/cross/base64.cc (revision 0) |
+++ utils/cross/base64.cc (revision 0) |
@@ -0,0 +1,90 @@ |
+/* |
+ * Copyright 2009, Google Inc. |
+ * All rights reserved. |
+ * |
+ * Redistribution and use in source and binary forms, with or without |
+ * modification, are permitted provided that the following conditions are |
+ * met: |
+ * |
+ * * Redistributions of source code must retain the above copyright |
+ * notice, this list of conditions and the following disclaimer. |
+ * * Redistributions in binary form must reproduce the above |
+ * copyright notice, this list of conditions and the following disclaimer |
+ * in the documentation and/or other materials provided with the |
+ * distribution. |
+ * * Neither the name of Google Inc. nor the names of its |
+ * contributors may be used to endorse or promote products derived from |
+ * this software without specific prior written permission. |
+ * |
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
+ */ |
+ |
+// This file contains the declaration of functions for dealing with base64 |
+// encoding and decoding |
+ |
+#include "utils/cross/base64.h" |
+#include "core/cross/types.h" |
+ |
+namespace o3d { |
+namespace base64 { |
+ |
+size_t GetEncodeLength(size_t length) { |
+ return (length + 2) / 3 * 4; |
+} |
+ |
+void Encode(const void* src_ptr, size_t length, void* dst_ptr) { |
+ const int kEncodePad = 64; |
+ |
+ static const char kEncode[] = |
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
+ "abcdefghijklmnopqrstuvwxyz" |
+ "0123456789+/="; |
+ |
+ const uint8* src = reinterpret_cast<const uint8*>(src_ptr); |
+ uint8* dst = reinterpret_cast<uint8*>(dst_ptr); |
+ if (dst) { |
+ size_t remainder = length % 3; |
+ const uint8* end = &src[length - remainder]; |
+ while (src < end) { |
+ unsigned a = *src++; |
+ unsigned b = *src++; |
+ unsigned c = *src++; |
+ unsigned d = c & 0x3F; |
+ c = (c >> 6 | b << 2) & 0x3F; |
+ b = (b >> 4 | a << 4) & 0x3F; |
+ a = a >> 2; |
+ *dst++ = kEncode[a]; |
+ *dst++ = kEncode[b]; |
+ *dst++ = kEncode[c]; |
+ *dst++ = kEncode[d]; |
+ } |
+ if (remainder > 0) { |
+ unsigned k1 = 0; |
+ unsigned k2 = kEncodePad; |
+ unsigned a = *src++; |
+ if (remainder == 2) { |
+ int b = *src++; |
+ k1 = b >> 4; |
+ k2 = (b << 2) & 0x3F; |
+ } |
+ *dst++ = kEncode[a >> 2]; |
+ *dst++ = kEncode[(k1 | a << 4) & 0x3F]; |
+ *dst++ = kEncode[k2]; |
+ *dst++ = kEncode[kEncodePad]; |
+ } |
+ } |
+} |
+ |
+} // namespace base64 |
+} // namespace o3d |
+ |