//
// Copyright (c) 2008 Eric Czarny <eczarny@gmail.com>
//
// 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.
//
//
// Cocoa XML-RPC Framework
// NSDataAdditions.m
//
// Created by Eric Czarny on Wednesday, January 14, 2004.
// Copyright (c) 2008 Divisible by Zero.
//
#import "NSDataAdditions.h"
@implementation NSData (NSDataAdditions)
+ (NSData *)base64DataFromString: (NSString *)string {
unsigned long ixtext, lentext;
unsigned char ch, input[4], output[3];
short i, ixinput;
Boolean flignore, flendtext = false;
const char *temporary;
NSMutableData *result;
if (!string) {
return [NSData data];
}
ixtext = 0;
temporary = [string UTF8String];
lentext = [string length];
result = [NSMutableData dataWithCapacity: lentext];
ixinput = 0;
while (true) {
if (ixtext >= lentext) {
break;
}
ch = temporary[ixtext++];
flignore = false;
if ((ch >= 'A') && (ch <= 'Z')) {
ch = ch - 'A';
} else if ((ch >= 'a') && (ch <= 'z')) {
ch = ch - 'a' + 26;
} else if ((ch >= '0') && (ch <= '9')) {
ch = ch - '0' + 52;
} else if (ch == '+') {
ch = 62;
} else if (ch == '=') {
flendtext = true;
} else if (ch == '/') {
ch = 63;
} else {
flignore = true;
}
if (!flignore) {
short ctcharsinput = 3;
Boolean flbreak = false;
if (flendtext) {
if (ixinput == 0) {
break;
}
if ((ixinput == 1) || (ixinput == 2)) {
ctcharsinput = 1;
} else {
ctcharsinput = 2;
}
ixinput = 3;
flbreak = true;
}
input[ixinput++] = ch;
if (ixinput == 4) {
ixinput = 0;
output[0] = (input[0] << 2) | ((input[1] & 0x30) >> 4);
output[1] = ((input[1] & 0x0F) << 4) | ((input[2] & 0x3C) >> 2);
output[2] = ((input[2] & 0x03) << 6) | (input[3] & 0x3F);
for (i = 0; i < ctcharsinput; i++) {
[result appendBytes: &output[i] length: 1];
}
}
if (flbreak) {
break;
}
}
}
return result;
}
@end
