ObjFW  Artifact [f3f3f87feb]

Artifact f3f3f87febad14e18e14359285b7f788bf52f33cc9d07beae3693a7012d9a29d:

• File src/OFINIFile.m — part of check-in [62e2de30b9] at 2015-02-16 08:39:17 on branch trunk — Explicitly pass errno to exceptions

  The old behaviour where the exception would access errno directly on
  creation of the exception was very fragile. The two main problems with
  it were that sometimes it would pick up an errno even though none had
  been set and in other cases that when the exception was created errno
  had already been overridden.

  This also greatly increases errno handling on Win32, especially in
  conjunction with sockets. It can still be improved further, though. (user: js, size: 4341) [annotate] [blame] [check-ins using]

/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
 *   Jonathan Schleifer <js@webkeks.org>
 *
 * All rights reserved.
 *
 * This file is part of ObjFW. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
 * the packaging of this file.
 *
 * Alternatively, it may be distributed under the terms of the GNU General
 * Public License, either version 2 or 3, which can be found in the file
 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#include "config.h"

#include <errno.h>

#import "OFINIFile.h"
#import "OFArray.h"
#import "OFString.h"
#import "OFFile.h"
#import "OFINICategory.h"
#import "OFINICategory+Private.h"

#import "OFInvalidFormatException.h"
#import "OFOpenFileFailedException.h"

@interface OFINIFile (OF_PRIVATE_CATEGORY)
- (void)OF_parseFile: (OFString*)path
	    encoding: (of_string_encoding_t)encoding;
@end

static bool
isWhitespaceLine(OFString *line)
{
	const char *cString = [line UTF8String];
	size_t i, length = [line UTF8StringLength];

	for (i = 0; i < length; i++) {
		switch (cString[i]) {
		case ' ':
		case '\t':
		case '\n':
		case '\r':
			continue;
		default:
			return false;
		}
	}

	return true;
}

@implementation OFINIFile
+ (instancetype)fileWithPath: (OFString*)path
{
	return [[[self alloc] initWithPath: path] autorelease];
}

+ (instancetype)fileWithPath: (OFString*)path
		    encoding: (of_string_encoding_t)encoding
{
	return [[[self alloc] initWithPath: path
				  encoding: encoding] autorelease];
}

- init
{
	OF_INVALID_INIT_METHOD
}

- initWithPath: (OFString*)path
{
	return [self initWithPath: path
			 encoding: OF_STRING_ENCODING_UTF_8];
}

- initWithPath: (OFString*)path
      encoding: (of_string_encoding_t)encoding
{
	self = [super init];

	@try {
		_categories = [[OFMutableArray alloc] init];

		[self OF_parseFile: path
			  encoding: encoding];
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (void)dealloc
{
	[_categories release];

	[super dealloc];
}

- (OFINICategory*)categoryForName: (OFString*)name
{
	void *pool = objc_autoreleasePoolPush();
	OFEnumerator *enumerator = [_categories objectEnumerator];
	OFINICategory *category;

	while ((category = [enumerator nextObject]) != nil) {
		if ([[category name] isEqual: name]) {
			OFINICategory *ret = [category retain];

			objc_autoreleasePoolPop(pool);

			return [ret autorelease];
		}
	}

	category = [[[OFINICategory alloc] OF_init] autorelease];
	[category setName: name];
	[_categories addObject: category];

	[category retain];

	objc_autoreleasePoolPop(pool);

	return [category autorelease];
}

- (void)OF_parseFile: (OFString*)path
	    encoding: (of_string_encoding_t)encoding
{
	void *pool = objc_autoreleasePoolPush();
	OFFile *file;
	OFINICategory *category = nil;
	OFString *line;

	@try {
		file = [OFFile fileWithPath: path
				       mode: @"r"];
	} @catch (OFOpenFileFailedException *e) {
		/* Handle missing file like an empty file */
		if ([e errNo] == ENOENT)
			return;

		@throw e;
	}

	while ((line = [file readLineWithEncoding: encoding]) != nil) {
		if (isWhitespaceLine(line))
			continue;

		if ([line hasPrefix: @"["]) {
			OFString *categoryName;

			if (![line hasSuffix: @"]"])
				@throw [OFInvalidFormatException exception];

			categoryName = [line substringWithRange:
			    of_range(1, [line length] - 2)];

			category = [[[OFINICategory alloc]
			    OF_init] autorelease];
			[category setName: categoryName];
			[_categories addObject: category];
		} else {
			if (category == nil)
				@throw [OFInvalidFormatException exception];

			[category OF_parseLine: line];
		}
	}

	objc_autoreleasePoolPop(pool);
}

- (void)writeToFile: (OFString*)path
{
	[self writeToFile: path
		 encoding: OF_STRING_ENCODING_UTF_8];
}

- (void)writeToFile: (OFString*)path
	   encoding: (of_string_encoding_t)encoding
{
	void *pool = objc_autoreleasePoolPush();
	OFFile *file = [OFFile fileWithPath: path
				       mode: @"w"];
	OFEnumerator *enumerator = [_categories objectEnumerator];
	OFINICategory *category;
	bool first = true;

	while ((category = [enumerator nextObject]) != nil)
		if ([category OF_writeToStream: file
				      encoding: encoding
					 first: first])
			first = false;

	objc_autoreleasePoolPop(pool);
}
@end