From 9cd57b731ab1c666d4a1cb725538fdc137763d12 Mon Sep 17 00:00:00 2001
From: Starla Insigna <starla4444@gmail.com>
Date: Sat, 30 Jul 2011 11:19:14 -0400
Subject: Initial commit (version 0.2.1)

---
 libs/cocos2d/Support/base64.c | 93 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100755 libs/cocos2d/Support/base64.c

(limited to 'libs/cocos2d/Support/base64.c')

diff --git a/libs/cocos2d/Support/base64.c b/libs/cocos2d/Support/base64.c
new file mode 100755
index 0000000..9aa52a6
--- /dev/null
+++ b/libs/cocos2d/Support/base64.c
@@ -0,0 +1,93 @@
+/* 
+ public domain BASE64 code
+ 
+ modified for cocos2d-iphone: http://www.cocos2d-iphone.org
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "base64.h"
+
+unsigned char alphabet[64] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+int _base64Decode( unsigned char *input, unsigned int input_len, unsigned char *output, unsigned int *output_len );
+
+int _base64Decode( unsigned char *input, unsigned int input_len, unsigned char *output, unsigned int *output_len )
+{
+    static char inalphabet[256], decoder[256];
+    int i, bits, c, 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:
+				fprintf(stderr, "base64Decode: encoding incomplete: at least 2 bits missing");
+				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) {
+			fprintf(stderr, "base64 encoding incomplete: at least %d bits truncated",
+					((4 - char_count) * 6));
+			errors++;
+		}
+    }
+	
+	*output_len = output_idx;
+	return errors;
+}
+
+int base64Decode(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 = malloc( inLength * 3.0f / 4.0f + 1 );
+	if( *out ) {
+		int ret = _base64Decode(in, inLength, *out, &outLength);
+		
+		if (ret > 0 )
+		{
+			printf("Base64Utils: error decoding");
+			free(*out);
+			*out = NULL;			
+			outLength = 0;
+		}
+	}
+    return outLength;
+}
-- 
cgit 1.4.1