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+//
+// $Id: SPDataAdditions.m 891 2009-06-19 10:01:14Z bibiko $
+//
+// SPDataAdditions.m
+// sequel-pro
+//
+// Created by Hans-Jörg Bibiko on June 19, 2009
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+//
+// More info at <http://code.google.com/p/sequel-pro/>
+
+#import "SPDataAdditions.h"
+
+static char base64encodingTable[64] = {
+'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',
+'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f',
+'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
+'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/' };
+
+
+@implementation NSData (SPDataAdditions)
+
+/*
+ * Derived from http://colloquy.info/project/browser/trunk/NSDataAdditions.m?rev=1576
+ * Created by khammond on Mon Oct 29 2001.
+ * Formatted by Timothy Hatcher on Sun Jul 4 2004.
+ * Copyright (c) 2001 Kyle Hammond. All rights reserved.
+ * Original development by Dave Winer.
+ *
+ * Convert self to a base64 encoded NSString
+ */
+- (NSString *) base64EncodingWithLineLength:(unsigned int)lineLength {
+
+ const unsigned char *bytes = [self bytes];
+ unsigned long ixtext = 0;
+ unsigned long lentext = [self length];
+ long ctremaining = 0;
+ unsigned char inbuf[3], outbuf[4];
+ short i = 0;
+ short charsonline = 0, ctcopy = 0;
+ unsigned long ix = 0;
+
+ NSMutableString *base64 = [NSMutableString stringWithCapacity:lentext];
+
+ while(1) {
+ ctremaining = lentext - ixtext;
+ if( ctremaining <= 0 ) break;
+
+ for( i = 0; i < 3; i++ ) {
+ ix = ixtext + i;
+ if( ix < lentext ) inbuf[i] = bytes[ix];
+ else inbuf [i] = 0;
+ }
+
+ outbuf [0] = (inbuf [0] & 0xFC) >> 2;
+ outbuf [1] = ((inbuf [0] & 0x03) << 4) | ((inbuf [1] & 0xF0) >> 4);
+ outbuf [2] = ((inbuf [1] & 0x0F) << 2) | ((inbuf [2] & 0xC0) >> 6);
+ outbuf [3] = inbuf [2] & 0x3F;
+ ctcopy = 4;
+
+ switch( ctremaining ) {
+ case 1:
+ ctcopy = 2;
+ break;
+ case 2:
+ ctcopy = 3;
+ break;
+ }
+
+ for( i = 0; i < ctcopy; i++ )
+ [base64 appendFormat:@"%c", base64encodingTable[outbuf[i]]];
+
+ for( i = ctcopy; i < 4; i++ )
+ [base64 appendFormat:@"%c",'='];
+
+ ixtext += 3;
+ charsonline += 4;
+
+ if( lineLength > 0 ) {
+ if (charsonline >= lineLength) {
+ charsonline = 0;
+ [base64 appendString:@"\n"];
+ }
+ }
+ }
+
+ return base64;
+}
+
+
+
+@end