/* Copyright (c) 2007 Christopher J. W. Lloyd

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */

#import <Onyx2D/O2PDFDictionary.h>

#import <Foundation/NSString.h>
#import <Onyx2D/O2PDFArray.h>
#import <Onyx2D/O2PDFContext.h>
#import <Onyx2D/O2PDFObject_Boolean.h>
#import <Onyx2D/O2PDFObject_Integer.h>
#import <Onyx2D/O2PDFObject_Name.h>
#import <Onyx2D/O2PDFObject_Real.h>
#import <Onyx2D/O2PDFStream.h>
#import <stddef.h>
#import <string.h>

NSUInteger O2PDFHashCString(NSMapTable *table, const void *data) {
    const char *s = data;

    if (s != NULL) {
        NSUInteger i, result = 5381;

        for (i = 0; s[i] != '\0'; i++)
            result = ((result << 5) + result) + (NSUInteger)(s[i]); // hash*33+c

        return result;
    }

    return 0;
}

BOOL O2PDFIsEqualCString(NSMapTable *table, const void *data1,
                         const void *data2)
{
    if (data1 == data2)
        return YES;

    if (!data1)
        return !strlen((char *) data2);

    if (!data2)
        return !strlen((char *) data1);

    if (((char *) data1)[0] != ((char *) data2)[0])
        return NO;

    return (strcmp((char *) data1, (char *) data2)) ? NO : YES;
}

void O2PDFFreeCString(NSMapTable *table, void *data) {
    NSZoneFree(NULL, data);
}

NSMapTableKeyCallBacks O2PDFOwnedCStringKeyCallBacks = {O2PDFHashCString,
                                                        O2PDFIsEqualCString,
                                                        NULL,
                                                        O2PDFFreeCString,
                                                        NULL,
                                                        NULL};

@implementation O2PDFDictionary

- init {
    _table = NSCreateMapTable(O2PDFOwnedCStringKeyCallBacks,
                              NSObjectMapValueCallBacks, 0);
    return self;
}

+ (O2PDFDictionary *) pdfDictionary {
    return [[[self alloc] init] autorelease];
}

- (void) dealloc {
    NSFreeMapTable(_table);
    [super dealloc];
}

- (O2PDFObjectType) objectType {
    return kO2PDFObjectTypeDictionary;
}

- (BOOL) checkForType: (O2PDFObjectType) type value: (void *) value {
    if (type != kO2PDFObjectTypeDictionary)
        return NO;

    *((O2PDFDictionary **) value) = self;
    return YES;
}

- (void) setObjectForKey: (const char *) key value: (O2PDFObject *) object {
    char *keyCopy = NSZoneMalloc(NULL, strlen(key) + 1);

    strcpy(keyCopy, key);

    NSMapInsert(_table, keyCopy, object);
}

- (void) setBooleanForKey: (const char *) key value: (O2PDFBoolean) value {
    [self setObjectForKey: key
                    value: [O2PDFObject_Boolean pdfObjectWithBoolean: value]];
}

- (void) setIntegerForKey: (const char *) key value: (O2PDFInteger) value {
    [self setObjectForKey: key
                    value: [O2PDFObject_Integer pdfObjectWithInteger: value]];
}

- (void) setNumberForKey: (const char *) key value: (O2PDFReal) value {
    [self setObjectForKey: key
                    value: [O2PDFObject_Real pdfObjectWithReal: value]];
}

- (void) setNameForKey: (const char *) key value: (const char *) value {
    [self setObjectForKey: key
                    value: [O2PDFObject_Name pdfObjectWithCString: value]];
}

- (O2PDFObject *) objectForCStringKey: (const char *) key {
    O2PDFObject *object = NSMapGet(_table, key);

    return [object realObject];
}

- (O2PDFObject *) inheritedForCStringKey: (const char *) cStringKey
                               typecheck: (O2PDFObjectType) type
{
    O2PDFDictionary *parent = self;
    O2PDFObject *object;

    do {
        if ((object = [parent objectForCStringKey: cStringKey]) != nil) {
            if ([object objectType] == type)
                return object;
        }

    } while ([parent getDictionaryForKey: "Parent" value: &parent]);

    return nil;
}

- (BOOL) getObjectForKey: (const char *) key value: (O2PDFObject **) objectp {
    *objectp = [self objectForCStringKey: key];

    return (*objectp != NULL) ? YES : NO;
}

- (BOOL) getNullForKey: (const char *) key {
    O2PDFObject *object = [self objectForCStringKey: key];

    return ([object objectType] == kO2PDFObjectTypeNull) ? YES : NO;
}

- (BOOL) getBooleanForKey: (const char *) key value: (O2PDFBoolean *) valuep {
    O2PDFObject *object = [self objectForCStringKey: key];

    return [object checkForType: kO2PDFObjectTypeBoolean value: valuep];
}

- (BOOL) getIntegerForKey: (const char *) key value: (O2PDFInteger *) valuep {
    O2PDFObject *object = [self objectForCStringKey: key];

    return [object checkForType: kO2PDFObjectTypeInteger value: valuep];
}

- (BOOL) getNumberForKey: (const char *) key value: (O2PDFReal *) valuep {
    O2PDFObject *object = [self objectForCStringKey: key];

    return [object checkForType: kO2PDFObjectTypeReal value: valuep];
}

- (BOOL) getNameForKey: (const char *) key value: (const char **) namep {
    O2PDFObject *object = [self objectForCStringKey: key];

    return [object checkForType: kO2PDFObjectTypeName value: namep];
}

- (BOOL) getStringForKey: (const char *) key value: (O2PDFString **) stringp {
    O2PDFObject *object = [self objectForCStringKey: key];

    return [object checkForType: kO2PDFObjectTypeString value: stringp];
}

- (BOOL) getArrayForKey: (const char *) key value: (O2PDFArray **) arrayp {
    O2PDFObject *object = [self objectForCStringKey: key];

    return [object checkForType: kO2PDFObjectTypeArray value: arrayp];
}

- (BOOL) getDictionaryForKey: (const char *) key
                       value: (O2PDFDictionary **) dictionaryp
{
    O2PDFObject *object = [self objectForCStringKey: key];

    return [object checkForType: kO2PDFObjectTypeDictionary value: dictionaryp];
}

- (BOOL) getStreamForKey: (const char *) key value: (O2PDFStream **) streamp {
    O2PDFObject *object = [self objectForCStringKey: key];

    return [object checkForType: kO2PDFObjectTypeStream value: streamp];
}

- (NSString *) description {
    NSMutableString *result = [NSMutableString string];
    NSMapEnumerator state = NSEnumerateMapTable(_table);
    const char *key;
    id value;

    [result appendString: @"<<\n"];
    while (NSNextMapEnumeratorPair(&state, (void **) &key, (void **) &value)) {
        [result appendFormat: @"%s %@\n", key, value];
    }
    [result appendString: @">>\n"];

    return result;
}

- (void) encodeWithPDFContext: (O2PDFContext *) encoder {
    NSMapEnumerator state = NSEnumerateMapTable(_table);
    const char *key;
    id value;

    [encoder appendString: @"<<\n"];
    while (NSNextMapEnumeratorPair(&state, (void **) &key, (void **) &value)) {
        [encoder appendFormat: @"/%s ", key];
        [encoder encodePDFObject: value];
    }
    [encoder appendString: @">>\n"];
}

@end