433 lines
9.6 KiB
Objective-C
Executable File
433 lines
9.6 KiB
Objective-C
Executable File
//
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// NSString+RSParser.m
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// RSParser
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//
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// Created by Brent Simmons on 9/25/15.
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// Copyright © 2015 Ranchero Software, LLC. All rights reserved.
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//
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#import <CommonCrypto/CommonDigest.h>
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#import <RSParser/NSString+RSParser.h>
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@interface NSScanner (RSParser)
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- (BOOL)rs_scanEntityValue:(NSString * _Nullable * _Nullable)decodedEntity;
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@end
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@implementation NSString (RSParser)
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- (BOOL)rsparser_contains:(NSString *)s {
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return [self rangeOfString:s].location != NSNotFound;
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}
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- (NSString *)rsparser_stringByDecodingHTMLEntities {
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@autoreleasepool {
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NSScanner *scanner = [[NSScanner alloc] initWithString:self];
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scanner.charactersToBeSkipped = nil;
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NSMutableString *result = [[NSMutableString alloc] init];
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while (true) {
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NSString *scannedString = nil;
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if ([scanner scanUpToString:@"&" intoString:&scannedString]) {
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[result appendString:scannedString];
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}
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if (scanner.isAtEnd) {
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break;
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}
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NSUInteger savedScanLocation = scanner.scanLocation;
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NSString *decodedEntity = nil;
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if ([scanner rs_scanEntityValue:&decodedEntity]) {
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[result appendString:decodedEntity];
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}
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else {
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[result appendString:@"&"];
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scanner.scanLocation = savedScanLocation + 1;
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}
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if (scanner.isAtEnd) {
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break;
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}
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}
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if ([self isEqualToString:result]) {
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return self;
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}
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return [result copy];
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}
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}
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static NSDictionary *RSEntitiesDictionary(void);
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static NSString *RSParserStringWithValue(unichar value);
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- (NSString * _Nullable)rs_stringByDecodingEntity {
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// self may or may not have outer & and ; characters.
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NSMutableString *s = [self mutableCopy];
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if ([s hasPrefix:@"&"]) {
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[s deleteCharactersInRange:NSMakeRange(0, 1)];
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}
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if ([s hasSuffix:@";"]) {
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[s deleteCharactersInRange:NSMakeRange(s.length - 1, 1)];
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}
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NSDictionary *entitiesDictionary = RSEntitiesDictionary();
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NSString *decodedEntity = entitiesDictionary[self];
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if (decodedEntity) {
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return decodedEntity;
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}
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if ([s hasPrefix:@"#x"]) { // Hex
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NSScanner *scanner = [[NSScanner alloc] initWithString:s];
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scanner.charactersToBeSkipped = [NSCharacterSet characterSetWithCharactersInString:@"#x"];
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unsigned int hexValue = 0;
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if ([scanner scanHexInt:&hexValue]) {
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return RSParserStringWithValue((unichar)hexValue);
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}
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return nil;
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}
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else if ([s hasPrefix:@"#"]) {
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[s deleteCharactersInRange:NSMakeRange(0, 1)];
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NSInteger value = s.integerValue;
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if (value < 1) {
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return nil;
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}
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return RSParserStringWithValue((unichar)value);
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}
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return nil;
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}
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- (NSData *)_rsparser_md5HashData {
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NSData *data = [self dataUsingEncoding:NSUTF8StringEncoding];
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unsigned char hash[CC_MD5_DIGEST_LENGTH];
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CC_MD5(data.bytes, (CC_LONG)data.length, hash);
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return [NSData dataWithBytes:(const void *)hash length:CC_MD5_DIGEST_LENGTH];
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}
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- (NSString *)rsparser_md5Hash {
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NSData *md5Data = [self _rsparser_md5HashData];
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const Byte *bytes = md5Data.bytes;
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return [NSString stringWithFormat:@"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", bytes[0], bytes[1], bytes[2], bytes[3], bytes[4], bytes[5], bytes[6], bytes[7], bytes[8], bytes[9], bytes[10], bytes[11], bytes[12], bytes[13], bytes[14], bytes[15]];
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}
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@end
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@implementation NSScanner (RSParser)
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- (BOOL)rs_scanEntityValue:(NSString * _Nullable * _Nullable)decodedEntity {
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NSString *s = self.string;
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NSUInteger initialScanLocation = self.scanLocation;
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static NSUInteger maxEntityLength = 20; // It’s probably smaller, but this is just for sanity.
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while (true) {
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unichar ch = [s characterAtIndex:self.scanLocation];
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if ([NSCharacterSet.whitespaceAndNewlineCharacterSet characterIsMember:ch]) {
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break;
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}
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if (ch == ';') {
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if (!decodedEntity) {
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return YES;
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}
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NSString *rawEntity = [s substringWithRange:NSMakeRange(initialScanLocation + 1, (self.scanLocation - initialScanLocation) - 1)];
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*decodedEntity = [rawEntity rs_stringByDecodingEntity];
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self.scanLocation = self.scanLocation + 1;
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return *decodedEntity != nil;
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}
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self.scanLocation = self.scanLocation + 1;
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if (self.scanLocation - initialScanLocation > maxEntityLength) {
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break;
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}
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if (self.isAtEnd) {
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break;
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}
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}
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return NO;
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}
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@end
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static NSString *RSParserStringWithValue(unichar value) {
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return [[NSString alloc] initWithFormat:@"%C", value];
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}
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static NSDictionary *RSEntitiesDictionary(void) {
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static NSDictionary *entitiesDictionary = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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entitiesDictionary =
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@{@"#034": @"\"",
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@"#038": @"&",
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@"#38": @"&",
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@"#039": @"'",
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@"#145": @"‘",
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@"#146": @"’",
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@"#147": @"“",
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@"#148": @"”",
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@"#149": @"•",
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@"#150": @"-",
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@"#151": @"—",
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@"#153": @"™",
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@"#160": RSParserStringWithValue(160),
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@"#161": @"¡",
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@"#162": @"¢",
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@"#163": @"£",
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@"#164": @"?",
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@"#165": @"¥",
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@"#166": @"?",
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@"#167": @"§",
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@"#168": @"¨",
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@"#169": @"©",
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@"#170": @"©",
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@"#171": @"«",
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@"#172": @"¬",
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@"#173": @"¬",
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@"#174": @"®",
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@"#175": @"¯",
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@"#176": @"°",
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@"#177": @"±",
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@"#178": @" ",
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@"#179": @" ",
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@"#180": @"´",
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@"#181": @"µ",
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@"#182": @"µ",
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@"#183": @"·",
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@"#184": @"¸",
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@"#185": @" ",
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@"#186": @"º",
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@"#187": @"»",
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@"#188": @"1/4",
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@"#189": @"1/2",
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@"#190": @"1/2",
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@"#191": @"¿",
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@"#192": @"À",
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@"#193": @"Á",
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@"#194": @"Â",
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@"#195": @"Ã",
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@"#196": @"Ä",
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@"#197": @"Å",
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@"#198": @"Æ",
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@"#199": @"Ç",
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@"#200": @"È",
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@"#201": @"É",
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@"#202": @"Ê",
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@"#203": @"Ë",
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@"#204": @"Ì",
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@"#205": @"Í",
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@"#206": @"Î",
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@"#207": @"Ï",
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@"#208": @"?",
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@"#209": @"Ñ",
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@"#210": @"Ò",
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@"#211": @"Ó",
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@"#212": @"Ô",
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@"#213": @"Õ",
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@"#214": @"Ö",
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@"#215": @"x",
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@"#216": @"Ø",
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@"#217": @"Ù",
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@"#218": @"Ú",
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@"#219": @"Û",
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@"#220": @"Ü",
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@"#221": @"Y",
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@"#222": @"?",
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@"#223": @"ß",
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@"#224": @"à",
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@"#225": @"á",
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@"#226": @"â",
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@"#227": @"ã",
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@"#228": @"ä",
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@"#229": @"å",
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@"#230": @"æ",
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@"#231": @"ç",
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@"#232": @"è",
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@"#233": @"é",
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@"#234": @"ê",
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@"#235": @"ë",
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@"#236": @"ì",
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@"#237": @"í",
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@"#238": @"î",
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@"#239": @"ï",
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@"#240": @"?",
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@"#241": @"ñ",
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@"#242": @"ò",
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@"#243": @"ó",
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@"#244": @"ô",
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@"#245": @"õ",
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@"#246": @"ö",
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@"#247": @"÷",
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@"#248": @"ø",
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@"#249": @"ù",
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@"#250": @"ú",
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@"#251": @"û",
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@"#252": @"ü",
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@"#253": @"y",
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@"#254": @"?",
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@"#255": @"ÿ",
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@"#32": @" ",
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@"#34": @"\"",
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@"#39": @"'",
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@"#8194": @" ",
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@"#8195": @" ",
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@"#8211": @"-",
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@"#8212": @"—",
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@"#8216": @"‘",
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@"#8217": @"’",
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@"#8220": @"“",
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@"#8221": @"”",
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@"#8230": @"…",
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@"#8617": RSParserStringWithValue(8617),
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@"AElig": @"Æ",
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@"Aacute": @"Á",
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@"Acirc": @"Â",
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@"Agrave": @"À",
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@"Aring": @"Å",
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@"Atilde": @"Ã",
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@"Auml": @"Ä",
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@"Ccedil": @"Ç",
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@"Dstrok": @"?",
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@"ETH": @"?",
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@"Eacute": @"É",
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@"Ecirc": @"Ê",
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@"Egrave": @"È",
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@"Euml": @"Ë",
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@"Iacute": @"Í",
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@"Icirc": @"Î",
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@"Igrave": @"Ì",
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@"Iuml": @"Ï",
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@"Ntilde": @"Ñ",
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@"Oacute": @"Ó",
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@"Ocirc": @"Ô",
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@"Ograve": @"Ò",
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@"Oslash": @"Ø",
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@"Otilde": @"Õ",
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@"Ouml": @"Ö",
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@"Pi": @"Π",
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@"THORN": @"?",
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@"Uacute": @"Ú",
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@"Ucirc": @"Û",
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@"Ugrave": @"Ù",
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@"Uuml": @"Ü",
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@"Yacute": @"Y",
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@"aacute": @"á",
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@"acirc": @"â",
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@"acute": @"´",
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@"aelig": @"æ",
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@"agrave": @"à",
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@"amp": @"&",
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@"apos": @"'",
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@"aring": @"å",
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@"atilde": @"ã",
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@"auml": @"ä",
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@"brkbar": @"?",
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@"brvbar": @"?",
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@"ccedil": @"ç",
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@"cedil": @"¸",
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@"cent": @"¢",
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@"copy": @"©",
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@"curren": @"?",
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@"deg": @"°",
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@"die": @"?",
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@"divide": @"÷",
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@"eacute": @"é",
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@"ecirc": @"ê",
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@"egrave": @"è",
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@"eth": @"?",
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@"euml": @"ë",
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@"euro": @"€",
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@"frac12": @"1/2",
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@"frac14": @"1/4",
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@"frac34": @"3/4",
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@"gt": @">",
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@"hearts": @"♥",
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@"hellip": @"…",
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@"iacute": @"í",
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@"icirc": @"î",
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@"iexcl": @"¡",
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@"igrave": @"ì",
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@"iquest": @"¿",
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@"iuml": @"ï",
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@"laquo": @"«",
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@"ldquo": @"“",
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@"lsquo": @"‘",
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@"lt": @"<",
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@"macr": @"¯",
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@"mdash": @"—",
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@"micro": @"µ",
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@"middot": @"·",
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@"ndash": @"-",
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@"not": @"¬",
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@"ntilde": @"ñ",
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@"oacute": @"ó",
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@"ocirc": @"ô",
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@"ograve": @"ò",
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@"ordf": @"ª",
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@"ordm": @"º",
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@"oslash": @"ø",
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@"otilde": @"õ",
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@"ouml": @"ö",
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@"para": @"¶",
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@"pi": @"π",
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@"plusmn": @"±",
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@"pound": @"£",
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@"quot": @"\"",
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@"raquo": @"»",
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@"rdquo": @"”",
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@"reg": @"®",
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@"rsquo": @"’",
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@"sect": @"§",
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@"shy": @" ",
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@"sup1": @" ",
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@"sup2": @" ",
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@"sup3": @" ",
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@"szlig": @"ß",
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@"thorn": @"?",
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@"times": @"x",
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@"trade": @"™",
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@"uacute": @"ú",
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@"ucirc": @"û",
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@"ugrave": @"ù",
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@"uml": @"¨",
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@"uuml": @"ü",
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@"yacute": @"y",
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@"yen": @"¥",
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@"yuml": @"ÿ",
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@"infin": @"∞",
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@"nbsp": RSParserStringWithValue(160),
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@"#x21A9": RSParserStringWithValue(8617),
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@"#xFE0E": RSParserStringWithValue(65038),
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@"#x2019": RSParserStringWithValue(8217),
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@"#x2026": RSParserStringWithValue(8230),
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@"#x201C": RSParserStringWithValue(8220),
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@"#x201D": RSParserStringWithValue(8221),
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@"#x2014": RSParserStringWithValue(8212)};
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});
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return entitiesDictionary;
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}
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