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/*
* Copyright 2013 Alex Merry <alex.merry@kdemail.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#import <Foundation/Foundation.h>
#import "NSString+Util.h"
#import "NSError+Tikzit.h"
@implementation NSString (Util)
+ (NSString*) stringWithContentsOfFile:(NSString*)path
error:(NSError**)error
{
return [[[self alloc] initWithContentsOfFile:path error:error] autorelease];
}
- (id) initWithContentsOfFile:(NSString*)path
error:(NSError**)error
{
// Fun fact: on GNUstep, at least,
// [stringWithContentsOfFile:usedEncoding:error:] only
// sets error objects if the decoding fails, not if file
// access fails.
// Fun fact 2: on GNUstep, trying to read a directory using
// [stringWithContentsOfFile:] causes an out-of-memory error;
// hence we do these checks *before* trying to read the file.
NSFileManager *fm = [NSFileManager defaultManager];
BOOL isDir = NO;
NSString *msg = nil;
if (![fm fileExistsAtPath:path isDirectory:&isDir]) {
msg = [NSString stringWithFormat:@"\"%@\" does not exist", path];
} else if (isDir) {
msg = [NSString stringWithFormat:@"\"%@\" is a directory", path];
} else if (![fm isReadableFileAtPath:path]) {
msg = [NSString stringWithFormat:@"\"%@\" is not readable", path];
}
if (msg != nil) {
if (error) {
*error = [NSError errorWithMessage:msg
code:TZ_ERR_IO];
}
return nil;
}
self = [self initWithContentsOfFile:path];
if (self == nil) {
if (error) {
*error = [NSError errorWithMessage:@"unknown error"
code:TZ_ERR_IO];
}
}
return self;
}
@end
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