+++ /dev/null
-//
-// CJSONScanner.m
-// TouchJSON
-//
-// Created by Jonathan Wight on 12/07/2005.
-// Copyright 2005 Toxic Software. All rights reserved.
-//
-
-#import "CJSONScanner.h"
-
-#import "NSCharacterSet_Extensions.h"
-#import "CDataScanner_Extensions.h"
-
-inline static int HexToInt(char inCharacter)
-{
-int theValues[] = { 0x0 /* 48 '0' */, 0x1 /* 49 '1' */, 0x2 /* 50 '2' */, 0x3 /* 51 '3' */, 0x4 /* 52 '4' */, 0x5 /* 53 '5' */, 0x6 /* 54 '6' */, 0x7 /* 55 '7' */, 0x8 /* 56 '8' */, 0x9 /* 57 '9' */, -1 /* 58 ':' */, -1 /* 59 ';' */, -1 /* 60 '<' */, -1 /* 61 '=' */, -1 /* 62 '>' */, -1 /* 63 '?' */, -1 /* 64 '@' */, 0xa /* 65 'A' */, 0xb /* 66 'B' */, 0xc /* 67 'C' */, 0xd /* 68 'D' */, 0xe /* 69 'E' */, 0xf /* 70 'F' */, -1 /* 71 'G' */, -1 /* 72 'H' */, -1 /* 73 'I' */, -1 /* 74 'J' */, -1 /* 75 'K' */, -1 /* 76 'L' */, -1 /* 77 'M' */, -1 /* 78 'N' */, -1 /* 79 'O' */, -1 /* 80 'P' */, -1 /* 81 'Q' */, -1 /* 82 'R' */, -1 /* 83 'S' */, -1 /* 84 'T' */, -1 /* 85 'U' */, -1 /* 86 'V' */, -1 /* 87 'W' */, -1 /* 88 'X' */, -1 /* 89 'Y' */, -1 /* 90 'Z' */, -1 /* 91 '[' */, -1 /* 92 '\' */, -1 /* 93 ']' */, -1 /* 94 '^' */, -1 /* 95 '_' */, -1 /* 96 '`' */, 0xa /* 97 'a' */, 0xb /* 98 'b' */, 0xc /* 99 'c' */, 0xd /* 100 'd' */, 0xe /* 101 'e' */, 0xf /* 102 'f' */, };
-if (inCharacter >= '0' && inCharacter <= 'f')
- return(theValues[inCharacter - '0']);
-else
- return(-1);
-}
-
-@interface CJSONScanner ()
-@property (readwrite, retain) NSCharacterSet *notQuoteCharacters;
-@property (readwrite, retain) NSCharacterSet *whitespaceCharacterSet;
-@end
-
-#pragma mark -
-
-@implementation CJSONScanner
-
-@synthesize scanComments;
-@synthesize notQuoteCharacters;
-@synthesize whitespaceCharacterSet;
-
-- (id)init
-{
-if ((self = [super init]) != nil)
- {
- self.notQuoteCharacters = [[NSCharacterSet characterSetWithCharactersInString:@"\\\""] invertedSet];
- self.whitespaceCharacterSet = [NSCharacterSet whitespaceAndNewlineCharacterSet];
- }
-return(self);
-}
-
-- (void)dealloc
-{
-self.notQuoteCharacters = NULL;
-self.whitespaceCharacterSet = NULL;
-//
-[super dealloc];
-}
-
-#pragma mark -
-
-- (void)setData:(NSData *)inData
-{
-NSData *theData = inData;
-if (theData && theData.length >= 4)
- {
- // This code is lame, but it works. Because the first character of any JSON string will always be a control character we can work out the Unicode encoding by the bit pattern. See section 3 of http://www.ietf.org/rfc/rfc4627.txt
- const char *theChars = theData.bytes;
- NSStringEncoding theEncoding = NSUTF8StringEncoding;
- if (theChars[0] != 0 && theChars[1] == 0)
- {
- if (theChars[2] != 0 && theChars[3] == 0)
- theEncoding = NSUTF16LittleEndianStringEncoding;
- else if (theChars[2] == 0 && theChars[3] == 0)
- theEncoding = NSUTF32LittleEndianStringEncoding;
- }
- else if (theChars[0] == 0 && theChars[2] == 0 && theChars[3] != 0)
- {
- if (theChars[1] == 0)
- theEncoding = NSUTF32BigEndianStringEncoding;
- else if (theChars[1] != 0)
- theEncoding = NSUTF16BigEndianStringEncoding;
- }
-
- if (theEncoding != NSUTF8StringEncoding)
- {
- NSString *theString = [[[NSString alloc] initWithData:theData encoding:theEncoding] autorelease];
- theData = [theString dataUsingEncoding:NSUTF8StringEncoding];
- }
- }
-[super setData:theData];
-}
-
-#pragma mark -
-
-- (BOOL)scanJSONObject:(id *)outObject error:(NSError **)outError
-{
-[self skipJSONWhitespace];
-
-id theObject = NULL;
-
-const unichar C = [self currentCharacter];
-switch (C)
- {
- case 't':
- if ([self scanUTF8String:"true" intoString:NULL])
- {
- theObject = [NSNumber numberWithBool:YES];
- }
- break;
- case 'f':
- if ([self scanUTF8String:"false" intoString:NULL])
- {
- theObject = [NSNumber numberWithBool:NO];
- }
- break;
- case 'n':
- if ([self scanUTF8String:"null" intoString:NULL])
- {
- theObject = [NSNull null];
- }
- break;
- case '\"':
- case '\'':
- [self scanJSONStringConstant:&theObject error:outError];
- break;
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- case '-':
- [self scanJSONNumberConstant:&theObject error:outError];
- break;
- case '{':
- [self scanJSONDictionary:&theObject error:outError];
- break;
- case '[':
- [self scanJSONArray:&theObject error:outError];
- break;
- default:
-
- break;
- }
-
-if (outObject != NULL)
- *outObject = theObject;
-return(YES);
-}
-
-- (BOOL)scanJSONDictionary:(NSDictionary **)outDictionary error:(NSError **)outError
-{
-unsigned theScanLocation = [self scanLocation];
-
-//[self skipJSONWhitespace];
-
-if ([self scanCharacter:'{'] == NO)
- {
- if (outError)
- {
- *outError = [NSError errorWithDomain:@"CJSONScannerErrorDomain" code:-1 userInfo:NULL];
- }
- return(NO);
- }
-
-NSMutableDictionary *theDictionary = [NSMutableDictionary dictionary];
-
-while ([self scanCharacter:'}'] == NO)
- {
- NSString *theKey = NULL;
- if ([self scanJSONStringConstant:&theKey error:outError] == NO)
- {
- [self setScanLocation:theScanLocation];
- if (outError)
- {
- *outError = [NSError errorWithDomain:@"CJSONScannerErrorDomain" code:-2 userInfo:NULL];
- }
- return(NO);
- }
-
- [self skipJSONWhitespace];
-
- if ([self scanCharacter:':'] == NO)
- {
- [self setScanLocation:theScanLocation];
- if (outError)
- {
- *outError = [NSError errorWithDomain:@"CJSONScannerErrorDomain" code:-3 userInfo:NULL];
- }
- return(NO);
- }
-
- id theValue = NULL;
- if ([self scanJSONObject:&theValue error:outError] == NO)
- {
- [self setScanLocation:theScanLocation];
- if (outError)
- {
- *outError = [NSError errorWithDomain:@"CJSONScannerErrorDomain" code:-4 userInfo:NULL];
- }
- return(NO);
- }
-
- [theDictionary setValue:theValue forKey:theKey];
-
- [self skipJSONWhitespace];
- if ([self scanCharacter:','] == NO)
- {
- if ([self currentCharacter] != '}')
- {
- [self setScanLocation:theScanLocation];
- if (outError)
- {
- *outError = [NSError errorWithDomain:@"CJSONScannerErrorDomain" code:-5 userInfo:NULL];
- }
- return(NO);
- }
- break;
- }
- else
- {
- [self skipJSONWhitespace];
- if ([self currentCharacter] == '}')
- break;
- }
- }
-
-if ([self scanCharacter:'}'] == NO)
- {
- [self setScanLocation:theScanLocation];
- if (outError)
- {
- *outError = [NSError errorWithDomain:@"CJSONScannerErrorDomain" code:-6 userInfo:NULL];
- }
- return(NO);
- }
-
-if (outDictionary != NULL)
- *outDictionary = theDictionary;
-return(YES);
-}
-
-- (BOOL)scanJSONArray:(NSArray **)outArray error:(NSError **)outError
-{
-unsigned theScanLocation = [self scanLocation];
-
-//[self skipJSONWhitespace];
-if ([self scanCharacter:'['] == NO)
- {
- if (outError)
- {
- *outError = [NSError errorWithDomain:@"CJSONScannerErrorDomain" code:-7 userInfo:NULL];
- }
- return(NO);
- }
-
-NSMutableArray *theArray = [NSMutableArray array];
-
-[self skipJSONWhitespace];
-while ([self currentCharacter] != ']')
- {
- NSString *theValue = NULL;
- if ([self scanJSONObject:&theValue error:outError] == NO)
- {
- [self setScanLocation:theScanLocation];
- if (outError)
- {
- *outError = [NSError errorWithDomain:@"CJSONScannerErrorDomain" code:-8 userInfo:NULL];
- }
- return(NO);
- }
-
- [theArray addObject:theValue];
-
- [self skipJSONWhitespace];
- if ([self scanCharacter:','] == NO)
- {
- [self skipJSONWhitespace];
- if ([self currentCharacter] != ']')
- {
- [self setScanLocation:theScanLocation];
- if (outError)
- {
- *outError = [NSError errorWithDomain:@"CJSONScannerErrorDomain" code:-9 userInfo:NULL];
- }
- return(NO);
- }
-
- break;
- }
- [self skipJSONWhitespace];
- }
-
-[self skipJSONWhitespace];
-
-if ([self scanCharacter:']'] == NO)
- {
- [self setScanLocation:theScanLocation];
- if (outError)
- {
- *outError = [NSError errorWithDomain:@"CJSONScannerErrorDomain" code:-10 userInfo:NULL];
- }
- return(NO);
- }
-
-if (outArray != NULL)
- *outArray = theArray;
-return(YES);
-}
-
-- (BOOL)scanJSONStringConstant:(NSString **)outStringConstant error:(NSError **)outError
-{
-unsigned theScanLocation = [self scanLocation];
-
-[self skipJSONWhitespace]; // TODO - i want to remove this method. But breaks unit tests.
-
-NSMutableString *theString = [NSMutableString string];
-
-if ([self scanCharacter:'"'] == NO)
- {
- [self setScanLocation:theScanLocation];
- if (outError)
- {
- *outError = [NSError errorWithDomain:@"CJSONScannerErrorDomain" code:-11 userInfo:NULL];
- }
- return(NO);
- }
-
-while ([self scanCharacter:'"'] == NO)
- {
- NSString *theStringChunk = NULL;
- if ([self scanCharactersFromSet:notQuoteCharacters intoString:&theStringChunk])
- {
- [theString appendString:theStringChunk];
- }
-
- if ([self scanCharacter:'\\'] == YES)
- {
- unichar theCharacter = [self scanCharacter];
- switch (theCharacter)
- {
- case '"':
- case '\\':
- case '/':
- break;
- case 'b':
- theCharacter = '\b';
- break;
- case 'f':
- theCharacter = '\f';
- break;
- case 'n':
- theCharacter = '\n';
- break;
- case 'r':
- theCharacter = '\r';
- break;
- case 't':
- theCharacter = '\t';
- break;
- case 'u':
- {
- theCharacter = 0;
-
- int theShift;
- for (theShift = 12; theShift >= 0; theShift -= 4)
- {
- const int theDigit = HexToInt([self scanCharacter]);
- if (theDigit == -1)
- {
- [self setScanLocation:theScanLocation];
- if (outError)
- {
- *outError = [NSError errorWithDomain:@"CJSONScannerErrorDomain" code:-12 userInfo:NULL];
- }
- return(NO);
- }
- theCharacter |= (theDigit << theShift);
- }
- }
- break;
- default:
- {
- [self setScanLocation:theScanLocation];
- if (outError)
- {
- *outError = [NSError errorWithDomain:@"CJSONScannerErrorDomain" code:-13 userInfo:NULL];
- }
- return(NO);
- }
- break;
- }
- CFStringAppendCharacters((CFMutableStringRef)theString, &theCharacter, 1);
-// [theString appendFormat:@"%C", theCharacter];
- }
- }
-
-if (outStringConstant != NULL)
- *outStringConstant = theString;
-
-return(YES);
-}
-
-- (BOOL)scanJSONNumberConstant:(NSNumber **)outNumberConstant error:(NSError **)outError
-{
-//[self skipJSONWhitespace];
-
-NSNumber *theNumber = NULL;
-if ([self scanNumber:&theNumber] == YES)
- {
- if (outNumberConstant != NULL)
- *outNumberConstant = theNumber;
- return(YES);
- }
-else
- {
- if (outError)
- {
- *outError = [NSError errorWithDomain:@"CJSONScannerErrorDomain" code:-14 userInfo:NULL];
- }
- return(NO);
- }
-}
-
-- (void)skipJSONWhitespace
-{
-[self scanCharactersFromSet:whitespaceCharacterSet intoString:NULL];
-if (scanComments)
- {
- [self scanCStyleComment:NULL];
- [self scanCPlusPlusStyleComment:NULL];
- [self scanCharactersFromSet:whitespaceCharacterSet intoString:NULL];
- }
-}
-
-@end
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