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OOUNIXDateFormatter.mm
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OOUNIXDateFormatter.mm
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/*-
* Copyright (c) 2017 David T. Chisnall
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#import "OOUNIXDateFormatter.h"
#include <vector>
@implementation OOUNIXDateFormatter
@synthesize format;
- (NSDate*)dateFromString: (NSString*)aString
{
struct tm time = { 0 };
strptime([aString UTF8String], [format UTF8String], &time);
auto interval = mktime(&time);
return [NSDate dateWithTimeIntervalSince1970: interval];
}
- (NSString*)stringForObjectValue: (id)anObject
{
if (anObject == nil)
{
return nil;
}
if ([anObject isKindOfClass: [NSString class]])
{
return anObject;
}
if (![anObject isKindOfClass: [NSDate class]])
{
[NSException raise: NSInvalidArgumentException
format: @"Unexpected class: %@", [anObject class]];
}
return [self stringFromDate: anObject];
}
- (BOOL)getObjectValue: (out id _Nullable*)obj
forString: (NSString*)string
errorDescription: (out NSString*_Nullable*)error
{
*obj = [self dateFromString: string];
return YES;
}
- (NSString*)stringFromDate: (NSDate*)aDate
{
struct tm time;
std::vector<char> buf;
buf.reserve(128);
time_t interval = (time_t)[aDate timeIntervalSince1970];
time = *localtime(&interval);
// Keep doubling the buffer until it works.
while (strftime(buf.data(), buf.capacity(), [format UTF8String], &time) == 0)
{
buf.reserve(buf.capacity()*2);
}
return [NSString stringWithCString: buf.data() encoding: NSUTF8StringEncoding];
}
@end