65 lines
1.6 KiB
Objective-C
65 lines
1.6 KiB
Objective-C
#import "GBMemoryByteArray.h"
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#import "GBCompleteByteSlice.h"
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@implementation GBMemoryByteArray
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{
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Document *_document;
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}
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- (instancetype) initWithDocument:(Document *)document
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{
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if ((self = [super init])) {
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_document = document;
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}
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return self;
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}
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- (unsigned long long)length
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{
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return 0x10000;
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}
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- (void)copyBytes:(unsigned char *)dst range:(HFRange)range
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{
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uint16_t addr = (uint16_t) range.location;
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unsigned long long length = range.length;
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while (length) {
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*(dst++) = [_document readMemory:addr++];
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length--;
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}
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}
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- (NSArray *)byteSlices
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{
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return @[[[GBCompleteByteSlice alloc] initWithByteArray:self]];
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}
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- (HFByteArray *)subarrayWithRange:(HFRange)range
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{
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unsigned char arr[range.length];
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[self copyBytes:arr range:range];
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HFByteArray *ret = [[HFBTreeByteArray alloc] init];
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HFFullMemoryByteSlice *slice = [[HFFullMemoryByteSlice alloc] initWithData:[NSData dataWithBytes:arr length:range.length]];
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[ret insertByteSlice:slice inRange:HFRangeMake(0, 0)];
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return ret;
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}
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- (void)insertByteSlice:(HFByteSlice *)slice inRange:(HFRange)lrange
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{
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if (slice.length != lrange.length) return; /* Insertion is not allowed, only overwriting. */
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[_document performAtomicBlock:^{
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uint8_t values[lrange.length];
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[slice copyBytes:values range:HFRangeMake(0, lrange.length)];
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uint16_t addr = (uint16_t) lrange.location;
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uint8_t *src = values;
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unsigned long long length = lrange.length;
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while (length) {
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[_document writeMemory:addr++ value:*(src++)];
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length--;
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}
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}];
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}
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@end
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