mirror of https://github.com/axmolengine/axmol.git
111 lines
3.3 KiB
C++
111 lines
3.3 KiB
C++
/****************************************************************************
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Copyright (c) 2010 cocos2d-x.org
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#include <cstdio>
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#include <stdlib.h>
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#include "base64.h"
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namespace cocos2d {
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unsigned char alphabet[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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int _base64Decode( unsigned char *input, unsigned int input_len, unsigned char *output, unsigned int *output_len )
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{
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static char inalphabet[256], decoder[256];
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int i, bits, c, char_count, errors = 0;
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unsigned int input_idx = 0;
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unsigned int output_idx = 0;
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for (i = (sizeof alphabet) - 1; i >= 0 ; i--) {
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inalphabet[alphabet[i]] = 1;
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decoder[alphabet[i]] = i;
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}
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char_count = 0;
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bits = 0;
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for( input_idx=0; input_idx < input_len ; input_idx++ ) {
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c = input[ input_idx ];
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if (c == '=')
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break;
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if (c > 255 || ! inalphabet[c])
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continue;
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bits += decoder[c];
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char_count++;
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if (char_count == 4) {
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output[ output_idx++ ] = (bits >> 16);
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output[ output_idx++ ] = ((bits >> 8) & 0xff);
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output[ output_idx++ ] = ( bits & 0xff);
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bits = 0;
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char_count = 0;
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} else {
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bits <<= 6;
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}
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}
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if( c == '=' ) {
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switch (char_count) {
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case 1:
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std::fprintf(stderr, "base64Decode: encoding incomplete: at least 2 bits missing");
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errors++;
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break;
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case 2:
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output[ output_idx++ ] = ( bits >> 10 );
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break;
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case 3:
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output[ output_idx++ ] = ( bits >> 16 );
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output[ output_idx++ ] = (( bits >> 8 ) & 0xff);
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break;
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}
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} else if ( input_idx < input_len ) {
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if (char_count) {
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std::fprintf(stderr, "base64 encoding incomplete: at least %d bits truncated",
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((4 - char_count) * 6));
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errors++;
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}
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}
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*output_len = output_idx;
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return errors;
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}
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int base64Decode(unsigned char *in, unsigned int inLength, unsigned char **out)
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{
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unsigned int outLength = 0;
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//should be enough to store 6-bit buffers in 8-bit buffers
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*out = new unsigned char[(size_t)(inLength * 3.0f / 4.0f + 1)];
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if( *out ) {
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int ret = _base64Decode(in, inLength, *out, &outLength);
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if (ret > 0 )
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{
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std::printf("Base64Utils: error decoding");
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delete [] *out;
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*out = NULL;
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outLength = 0;
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}
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}
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return outLength;
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}
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}//namespace cocos2d
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