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//
// Base64.m
//
// Version 1.2
//
// Created by Nick Lockwood on 12/01/2012.
// Copyright (C) 2012 Charcoal Design
//
// Distributed under the permissive zlib License
// Get the latest version from here:
//
// https://github.com/nicklockwood/Base64
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an aacknowledgment in the product documentation would be
// appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
#import "Base64.h"
#pragma GCC diagnostic ignored "-Wselector"
#import <Availability.h>
#if !__has_feature(objc_arc)
#error This library requires automatic reference counting
#endif
@implementation NSData (Base64)
+ (NSData *)dataWithBase64EncodedString:(NSString *)string
{
if (![string length]) return nil;
NSData *decoded = nil;
#if __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_9 || __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_7_0
if (![NSData instancesRespondToSelector:@selector(initWithBase64EncodedString:options:)])
{
decoded = [[self alloc] initWithBase64Encoding:[string stringByReplacingOccurrencesOfString:@"[^A-Za-z0-9+/=]" withString:@"" options:NSRegularExpressionSearch range:NSMakeRange(0, [string length])]];
}
else
#endif
{
decoded = [[self alloc] initWithBase64EncodedString:string options:NSDataBase64DecodingIgnoreUnknownCharacters];
}
return [decoded length]? decoded: nil;
}
- (NSString *)base64EncodedStringWithWrapWidth:(NSUInteger)wrapWidth
{
if (![self length]) return nil;
NSString *encoded = nil;
#if __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_9 || __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_7_0
if (![NSData instancesRespondToSelector:@selector(base64EncodedStringWithOptions:)])
{
encoded = [self base64Encoding];
}
else
#endif
{
switch (wrapWidth)
{
case 64:
{
return [self base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
}
case 76:
{
return [self base64EncodedStringWithOptions:NSDataBase64Encoding76CharacterLineLength];
}
default:
{
encoded = [self base64EncodedStringWithOptions:(NSDataBase64EncodingOptions)0];
}
}
}
if (!wrapWidth || wrapWidth >= [encoded length])
{
return encoded;
}
wrapWidth = (wrapWidth / 4) * 4;
NSMutableString *result = [NSMutableString string];
for (NSUInteger i = 0; i < [encoded length]; i+= wrapWidth)
{
if (i + wrapWidth >= [encoded length])
{
[result appendString:[encoded substringFromIndex:i]];
break;
}
[result appendString:[encoded substringWithRange:NSMakeRange(i, wrapWidth)]];
[result appendString:@"\r\n"];
}
return result;
}
- (NSString *)base64EncodedString
{
return [self base64EncodedStringWithWrapWidth:0];
}
@end
@implementation NSString (Base64)
+ (NSString *)stringWithBase64EncodedString:(NSString *)string
{
NSData *data = [NSData dataWithBase64EncodedString:string];
if (data)
{
return [[self alloc] initWithData:data encoding:NSUTF8StringEncoding];
}
return nil;
}
- (NSString *)base64EncodedStringWithWrapWidth:(NSUInteger)wrapWidth
{
NSData *data = [self dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
return [data base64EncodedStringWithWrapWidth:wrapWidth];
}
- (NSString *)base64EncodedString
{
NSData *data = [self dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
return [data base64EncodedString];
}
- (NSString *)base64DecodedString
{
return [NSString stringWithBase64EncodedString:self];
}
- (NSData *)base64DecodedData
{
return [NSData dataWithBase64EncodedString:self];
}
@end