OORegExpMatcher Class Reference

#include <OORegExpMatcher.h>

Inheritance diagram for OORegExpMatcher:

Collaboration diagram for OORegExpMatcher:

Instance Methods
(BOOL)	- string:matchesExpression:
(BOOL)	- string:matchesExpression:flags:
(id)	- init [implementation]
(void)	- dealloc [implementation]

Class Methods
(instancetype)	+ regExpMatcher

Private Attributes
OOJSFunction *	_tester
NSString *	_cachedRegExpString
OOJSValue *	_cachedRegExpObject
NSUInteger	_cachedFlags

Detailed Description

Definition at line 47 of file OORegExpMatcher.h.

Method Documentation

dealloc

- (void) dealloc

implementation

Definition at line 34 of file OORegExpMatcher.m.

{
    if (sActiveInstance == self)  sActiveInstance = nil;
    
    DESTROY(_tester);
    DESTROY(_cachedRegExpString);
    DESTROY(_cachedRegExpObject);
    
    [super dealloc];
}

References nil, and sActiveInstance.

init

- (id) init

implementation

Definition at line 34 of file OORegExpMatcher.m.

{
    if ((self = [super init]))
    {   
        const char *argumentNames[2] = { "string", "regexp" };
        unsigned codeLine = __LINE__ + 1;   // NB: should remain line before code.
        NSString *code = @"return regexp.test(string);";
        
        [OOJavaScriptEngine sharedEngine];  // Summon the beast from the Pit.
        
        JSContext *context = OOJSAcquireContext();
        _tester = [[OOJSFunction alloc] initWithName:@"matchesRegExp"
                                               scope:NULL
                                                code:code
                                        argumentCount:2
                                       argumentNames:argumentNames
                                            fileName:[@__FILE__ lastPathComponent]
                                          lineNumber:codeLine
                                             context:context];
        
        OOJSRelinquishContext(context);
        
        if (_tester == nil)  DESTROY(self);
    }
    
    return self;
}

regExpMatcher

+ (instancetype) regExpMatcher

Definition at line 34 of file OORegExpMatcher.m.

{
    NSAssert(![NSThread respondsToSelector:@selector(isMainThread)] || [[NSThread currentThread] isMainThread], @"OORegExpMatcher may only be used on the main thread.");
    
    if (sActiveInstance == nil)
    {
        sActiveInstance = [[[self alloc] init] autorelease];
    }
    
    return sActiveInstance;
}

string:matchesExpression:

- (BOOL) string:		(NSString *)	string
matchesExpression:		(NSString *)	regExp

Definition at line 34 of file OORegExpMatcher.m.

               :(NSString *)string matchesExpression:(NSString *)regExp
{
    return [self string:string matchesExpression:regExp flags:0];
}

string:matchesExpression:flags:

- (BOOL) string:		(NSString *)	string
matchesExpression:		(NSString *)	regExp
flags:		(NSUInteger)	flags

Definition at line 34 of file OORegExpMatcher.m.

               :(NSString *)string matchesExpression:(NSString *)regExp flags:(NSUInteger)flags
{
    NSAssert(![NSThread respondsToSelector:@selector(isMainThread)] || [[NSThread currentThread] isMainThread], @"OORegExpMatcher may only be used on the main thread.");
    
    size_t expLength = [regExp length];
    if (EXPECT_NOT(expLength == 0))  return NO;
    
    JSContext *context = OOJSAcquireContext();
    
    // Create new RegExp object if necessary.
    if (flags != _cachedFlags || ![regExp isEqualToString:_cachedRegExpString])
    {
        DESTROY(_cachedRegExpString);
        DESTROY(_cachedRegExpObject);
        
        unichar *buffer;
        buffer = malloc(expLength * sizeof *buffer);
        if (EXPECT_NOT(buffer == NULL))  return NO;
        [regExp getCharacters:buffer];
        
        _cachedRegExpString = [regExp retain];
        JSObject *regExpObj = JS_NewUCRegExpObjectNoStatics(context, buffer, expLength, (uintN)flags);
        _cachedRegExpObject = [[OOJSValue alloc] initWithJSObject:regExpObj inContext:context];
        _cachedFlags = flags;
        
        free(buffer);
    }
    
    BOOL result = [_tester evaluatePredicateWithContext:context
                                                  scope:nil
                                              arguments:[NSArray arrayWithObjects:string, _cachedRegExpObject, nil]];
    
    OOJSRelinquishContext(context);
    
    return result;
}

Member Data Documentation

_cachedFlags

- (NSUInteger) _cachedFlags

private

Definition at line 53 of file OORegExpMatcher.h.

_cachedRegExpObject

- (OOJSValue*) _cachedRegExpObject

private

Definition at line 52 of file OORegExpMatcher.h.

_cachedRegExpString

- (NSString*) _cachedRegExpString

private

Definition at line 51 of file OORegExpMatcher.h.

_tester

- (OOJSFunction*) _tester

private

Definition at line 50 of file OORegExpMatcher.h.

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The documentation for this class was generated from the following files:

• src/Core/OORegExpMatcher.h
• src/Core/OORegExpMatcher.m