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Diffstat (limited to 'Source/SPDataAdditions.m')
| -rw-r--r-- | Source/SPDataAdditions.m | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/Source/SPDataAdditions.m b/Source/SPDataAdditions.m new file mode 100644 index 00000000..166288e5 --- /dev/null +++ b/Source/SPDataAdditions.m @@ -0,0 +1,105 @@ +// +// $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 |