ObjFW  Diff

#import "macros.h"

#import "OFInvalidFormatException.h"

OF_ASSUME_NONNULL_BEGIN

typedef struct OFHuffmanTree {
	struct OFHuffmanTree *_Nullable leaves[2];
typedef struct _OFHuffmanTree {
	struct _OFHuffmanTree *_Nullable leaves[2];
	uint16_t value;
} OFHuffmanTree;
} *OFHuffmanTree;

/* Inlined for performance. */
static OF_INLINE bool
OFHuffmanTreeWalk(id _Nullable stream,
    bool (*bitReader)(id _Nullable, uint16_t *_Nonnull, uint8_t),
    OFHuffmanTree *_Nonnull *_Nonnull tree, uint16_t *_Nonnull value)
    OFHuffmanTree _Nonnull *_Nonnull tree, uint16_t *_Nonnull value)
{
	struct OFHuffmanTree *iter = *tree;
	OFHuffmanTree iter = *tree;
	uint16_t bits;

	while (iter->value == 0xFFFF) {
		if OF_UNLIKELY (!bitReader(stream, &bits, 1)) {
			*tree = iter;
			return false;
		}

	*value = iter->value;
	return true;
}

#ifdef __cplusplus
extern "C" {
#endif
extern OFHuffmanTree *_Nonnull OFHuffmanTreeNew(uint8_t lengths[_Nonnull],
extern OFHuffmanTree _Nonnull OFHuffmanTreeNew(uint8_t lengths[_Nonnull],
    uint16_t count);
extern OFHuffmanTree *_Nonnull OFHuffmanTreeNewSingle(uint16_t value);
extern void OFHuffmanTreeFree(OFHuffmanTree *_Nonnull tree);
extern OFHuffmanTree _Nonnull OFHuffmanTreeNewSingle(uint16_t value);
extern void OFHuffmanTreeFree(OFHuffmanTree _Nonnull tree);
#ifdef __cplusplus
}
#endif

OF_ASSUME_NONNULL_END