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//
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// GTMStringEncoding.h
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//
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// Copyright 2010 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy
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// of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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//
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// This is a copy of GTMStringEncoding. FIRInstanceID wants to avoid
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// a CocoaPods GTM dependency. Hence we use our own version of StringEncoding.
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#import <Foundation/Foundation.h>
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// A generic class for arbitrary base-2 to 128 string encoding and decoding.
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@interface FIRInstanceIDStringEncoding : NSObject {
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@private
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NSData *charMapData_;
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char *charMap_;
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int reverseCharMap_[128];
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int shift_;
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unsigned int mask_;
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BOOL doPad_;
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char paddingChar_;
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int padLen_;
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}
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+ (id)rfc4648Base64WebsafeStringEncoding;
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// Create a new, autoreleased GTMStringEncoding object with the given string,
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// as described below.
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+ (id)stringEncodingWithString:(NSString *)string;
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// Initialize a new GTMStringEncoding object with the string.
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//
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// The length of the string must be a power of 2, at least 2 and at most 128.
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// Only 7-bit ASCII characters are permitted in the string.
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//
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// These characters are the canonical set emitted during encoding.
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// If the characters have alternatives (e.g. case, easily transposed) then use
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// addDecodeSynonyms: to configure them.
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- (id)initWithString:(NSString *)string;
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// Indicates whether padding is performed during encoding.
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- (BOOL)doPad;
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- (void)setDoPad:(BOOL)doPad;
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// Sets the padding character to use during encoding.
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- (void)setPaddingChar:(char)c;
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// Encode a raw binary buffer to a 7-bit ASCII string.
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- (NSString *)encode:(NSData *)data;
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// Decode a 7-bit ASCII string to a raw binary buffer.
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- (NSData *)decode:(NSString *)string;
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@end
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