mirror of
https://github.com/samsonjs/arq_restore.git
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90 lines
3.5 KiB
Objective-C
90 lines
3.5 KiB
Objective-C
/*
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Copyright (c) 2009-2010, Stefan Reitshamer http://www.haystacksoftware.com
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the names of PhotoMinds LLC or Haystack Software, nor the names of
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their contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#import "NSString_extra.h"
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#import "RegexKitLite.h"
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static NSString *PATH_PATTERN = @"^(.+)(\\.\\w+)$";
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static unsigned char hexCharToInt(char c1) {
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if (c1 >= '0' && c1 <= '9') {
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return c1 - '0';
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}
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if (c1 >= 'a' && c1 <= 'f') {
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return c1 - 'a' + 10;
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}
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if (c1 >= 'A' && c1 <= 'F') {
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return c1 - 'A' + 10;
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}
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@throw [NSException exceptionWithName:@"Invalid hex char" reason:@"not a hex char" userInfo:nil];
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}
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@implementation NSString (extra)
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+ (NSString *)hexStringWithBytes:(unsigned char *)bytes length:(unsigned int)length {
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char *buf = (char *)malloc(length * 2 + 1);
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for (unsigned int i = 0; i < length; i++) {
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unsigned char c = bytes[i];
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snprintf(buf + i*2, 3, "%02x", (unsigned int)c);
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}
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NSString *ret = [[[NSString alloc] initWithBytes:buf length:length*2 encoding:NSUTF8StringEncoding] autorelease];
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free(buf);
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return ret;
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}
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- (NSString *)stringWithUniquePath {
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NSString *left = self;
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NSString *right = @"";
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if ([self rangeOfRegex:PATH_PATTERN].location != NSNotFound) {
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left = [self substringWithRange:[self rangeOfRegex:PATH_PATTERN capture:1]];
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right = [self substringWithRange:[self rangeOfRegex:PATH_PATTERN capture:2]];
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}
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NSFileManager *fm = [NSFileManager defaultManager];
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NSUInteger index = 2;
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NSString *path = [NSString stringWithString:self];
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while ([fm fileExistsAtPath:path]) {
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path = [NSString stringWithFormat:@"%@_%u%@", left, index++, right];
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}
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return path;
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}
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- (NSData *)hexStringToData {
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const char *ascii = [self cStringUsingEncoding:NSASCIIStringEncoding];
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size_t len = strlen(ascii) / 2;
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NSMutableData *data = [NSMutableData dataWithLength:len];
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char *bytes = (char *)[data mutableBytes];
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for (size_t i = 0; i < len; i++) {
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unsigned char c1 = hexCharToInt(ascii[i*2]) << 4;
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unsigned char c2 = hexCharToInt(ascii[i*2 + 1]);
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unsigned char tmp = c1 | c2;
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bytes[i] = tmp;
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}
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return data;
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}
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@end
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