初始化

cocos2d-x/cocos/base/base64.cpp

@@ -0,0 +1,172 @@
+/****************************************************************************
+Copyright (c) 2010-2012 cocos2d-x.org
+Copyright (c) 2013-2016 Chukong Technologies Inc.
+Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
+
+http://www.cocos2d-x.org
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+****************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "base/base64.h"
+
+namespace cocos2d {
+
+unsigned char alphabet[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+int _base64Decode(const unsigned char *input, unsigned int input_len, unsigned char *output, unsigned int *output_len )
+{
+    static char inalphabet[256], decoder[256];
+    int i, bits, c = 0, char_count, errors = 0;
+    unsigned int input_idx = 0;
+    unsigned int output_idx = 0;
+
+    for (i = (sizeof alphabet) - 1; i >= 0 ; i--) {
+        inalphabet[alphabet[i]] = 1;
+        decoder[alphabet[i]] = i;
+    }
+
+    char_count = 0;
+    bits = 0;
+    for( input_idx=0; input_idx < input_len ; input_idx++ ) {
+        c = input[ input_idx ];
+        if (c == '=')
+            break;
+        if (c > 255 || ! inalphabet[c])
+            continue;
+        bits += decoder[c];
+        char_count++;
+        if (char_count == 4) {
+            output[ output_idx++ ] = (bits >> 16);
+            output[ output_idx++ ] = ((bits >> 8) & 0xff);
+            output[ output_idx++ ] = ( bits & 0xff);
+            bits = 0;
+            char_count = 0;
+        } else {
+            bits <<= 6;
+        }
+    }
+
+    if( c == '=' ) {
+        switch (char_count) {
+            case 1:
+#if (CC_TARGET_PLATFORM != CC_PLATFORM_BADA)
+                fprintf(stderr, "base64Decode: encoding incomplete: at least 2 bits missing");
+#endif
+                errors++;
+                break;
+            case 2:
+                output[ output_idx++ ] = ( bits >> 10 );
+                break;
+            case 3:
+                output[ output_idx++ ] = ( bits >> 16 );
+                output[ output_idx++ ] = (( bits >> 8 ) & 0xff);
+                break;
+            }
+    } else if ( input_idx < input_len ) {
+        if (char_count) {
+#if (CC_TARGET_PLATFORM != CC_PLATFORM_BADA)
+            fprintf(stderr, "base64 encoding incomplete: at least %d bits truncated",
+                    ((4 - char_count) * 6));
+#endif
+            errors++;
+        }
+    }
+
+    *output_len = output_idx;
+    return errors;
+}
+
+void _base64Encode( const unsigned char *input, unsigned int input_len, char *output )
+{
+    unsigned int char_count;
+    unsigned int bits;
+    unsigned int input_idx = 0;
+    unsigned int output_idx = 0;
+
+    char_count = 0;
+    bits = 0;
+    for( input_idx=0; input_idx < input_len ; input_idx++ ) {
+        bits |= input[ input_idx ];
+
+        char_count++;
+        if (char_count == 3) {
+            output[ output_idx++ ] = alphabet[(bits >> 18) & 0x3f];
+            output[ output_idx++ ] = alphabet[(bits >> 12) & 0x3f];
+            output[ output_idx++ ] = alphabet[(bits >> 6) & 0x3f];
+            output[ output_idx++ ] = alphabet[bits & 0x3f];
+            bits = 0;
+            char_count = 0;
+        } else {
+            bits <<= 8;
+        }
+    }
+
+    if (char_count) {
+        if (char_count == 1) {
+            bits <<= 8;
+        }
+
+        output[ output_idx++ ] = alphabet[(bits >> 18) & 0x3f];
+        output[ output_idx++ ] = alphabet[(bits >> 12) & 0x3f];
+        if (char_count > 1) {
+            output[ output_idx++ ] = alphabet[(bits >> 6) & 0x3f];
+        } else {
+            output[ output_idx++ ] = '=';
+        }
+        output[ output_idx++ ] = '=';
+    }
+
+    output[ output_idx++ ] = 0;
+}
+
+int base64Decode(const unsigned char *in, unsigned int inLength, unsigned char **out)
+{
+    unsigned int outLength = 0;
+
+    //should be enough to store 6-bit buffers in 8-bit buffers
+    *out = (unsigned char*)malloc(inLength / 4 * 3 + 1);
+    if( *out ) {
+        int ret = _base64Decode(in, inLength, *out, &outLength);
+
+        if (ret > 0)
+        {
+            free(*out);
+            *out = nullptr;
+            outLength = 0;
+        }
+    }
+    return outLength;
+}
+
+int base64Encode(const unsigned char *in, unsigned int inLength, char **out) {
+    unsigned int outLength = (inLength + 2) / 3 * 4;
+
+    //should be enough to store 8-bit buffers in 6-bit buffers
+    *out = (char*)malloc(outLength+1);
+    if( *out ) {
+        _base64Encode(in, inLength, *out);
+    }
+    return outLength;
+}
+
+}//namespace   cocos2d
+