34 lines
1.1 KiB
Plaintext
34 lines
1.1 KiB
Plaintext
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// This file Copyright © 2022 Transmission authors and contributors.
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// It may be used under the MIT (SPDX: MIT) license.
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// License text can be found in the licenses/ folder.
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#import "NSDataAdditions.h"
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@implementation NSData (Additions)
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// hexChars from Peter, Aug 19 '14: https://stackoverflow.com/a/25378464
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- (NSString*)hexString
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{
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char const* hexChars = "0123456789ABCDEF";
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NSUInteger length = self.length;
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unsigned char const* bytes = (unsigned char const*)self.bytes;
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char* chars = (char*)malloc(length * 2);
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if (chars == NULL)
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{
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// malloc returns null if attempting to allocate more memory than the system can provide. Thanks Cœur
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[NSException raise:@"NSInternalInconsistencyException" format:@"failed malloc" arguments:nil];
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return nil;
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}
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char* s = chars;
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NSUInteger i = length;
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while (i--)
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{
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*s++ = hexChars[*bytes >> 4];
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*s++ = hexChars[*bytes & 0xF];
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bytes++;
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}
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return [[NSString alloc] initWithBytesNoCopy:chars length:length * 2 encoding:NSASCIIStringEncoding freeWhenDone:YES];
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}
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@end
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