project_files/HedgewarsMobile/Classes/IniParser.m
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/*
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 * Hedgewars-iOS, a Hedgewars port for iOS devices
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 * Copyright (c) 2015-2016 Anton Malmygin <antonc27@mail.ru>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
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 */
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#import "IniParser.h"
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#define COMMENTS_START_CHAR ';'
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#define  SECTION_START_CHAR '['
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@interface IniParser ()
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@property (nonatomic, retain) NSString *iniFilePath;
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@property (nonatomic, retain) NSMutableArray *mutableSections;
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@property (nonatomic, retain) NSMutableDictionary *currentSection;
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@end
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@implementation IniParser
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#pragma mark - Initilisation
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- (instancetype)initWithIniFilePath:(NSString *)iniFilePath {
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    self = [super init];
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    if (self) {
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        _iniFilePath = [iniFilePath copy];
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    }
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    return self;
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}
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#pragma mark - Parse sections
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- (NSArray *)newParsedSections {
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    NSString *iniFileContents = [NSString stringWithContentsOfFile:self.iniFilePath encoding:NSUTF8StringEncoding error:nil];
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    [self prepareForParsing];
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    [iniFileContents enumerateLinesUsingBlock:^(NSString *line, BOOL *stop) {
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        if (![self isNeedToSkipLine:line]) {
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            [self parseLine:line];
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        }
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    }];
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    [self addLastParsedSectionToSections];
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    return [self copyParsedSections];
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}
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- (void)prepareForParsing {
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    self.mutableSections = [[NSMutableArray alloc] init];
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    self.currentSection = nil;
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}
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- (BOOL)isNeedToSkipLine:(NSString *)line {
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    return ([line length] < 1 || [self isLineAComment:line]);
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}
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- (BOOL)isLineAComment:(NSString *)line {
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    return ([line characterAtIndex:0] == COMMENTS_START_CHAR);
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}
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- (void)parseLine:(NSString *)line {
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    if ([self isLineASectionStart:line]) {
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        [self addPreviousSectionToSectionsIfNecessary];
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        [self createCurrentSection];
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    } else {
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        [self parseAssignmentForCurrentSectionInLine:line];
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    }
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}
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- (BOOL)isLineASectionStart:(NSString *)line {
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    return ([line characterAtIndex:0] == SECTION_START_CHAR);
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}
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- (void)addPreviousSectionToSectionsIfNecessary {
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    if (self.currentSection != nil) {
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        [self.mutableSections addObject:self.currentSection];
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        [self.currentSection release];
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    }
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}
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- (void)createCurrentSection {
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    self.currentSection = [[NSMutableDictionary alloc] init];
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}
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- (void)parseAssignmentForCurrentSectionInLine:(NSString *)line {
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    NSArray *components = [line componentsSeparatedByString:@"="];
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    if (components.count > 1) {
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        NSString *key = components[0];
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        NSString *value = components[1];
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        [self.currentSection setObject:value forKey:key];
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    }
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}
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- (void)addLastParsedSectionToSections {
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    [self addPreviousSectionToSectionsIfNecessary];
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}
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- (NSArray *)copyParsedSections {
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    return [self.mutableSections copy];
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}
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#pragma mark - Dealloc
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- (void)dealloc {
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    [_iniFilePath release];
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    [_mutableSections release];
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    [_currentSection release];
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    [super dealloc];
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}
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@end