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*/
#include "config.h"
#include <stdint.h>
#include <stdlib.h>
#import "huffman_tree.h"
#import "OFHuffmanTree.h"
#import "OFInvalidFormatException.h"
#import "OFOutOfMemoryException.h"
static struct of_huffman_tree *
static OFHuffmanTree
newTree(void)
{
struct of_huffman_tree *tree;
OFHuffmanTree tree;
tree = of_alloc(1, sizeof(*tree));
tree = OFAllocMemory(1, sizeof(*tree));
tree->leaves[0] = tree->leaves[1] = NULL;
tree->value = 0xFFFF;
return tree;
}
static void
insertTree(struct of_huffman_tree *tree, uint16_t code, uint8_t length,
uint16_t value)
struct of_huffman_tree *
of_huffman_tree_construct(uint8_t lengths[], uint16_t count)
struct of_huffman_tree *tree;
OFHuffmanTree tree;
uint16_t *lengthCount = NULL;
uint16_t code, maxCode = 0, *nextCode = NULL;
uint_fast8_t maxBit = 0;
@try {
for (uint16_t i = 0; i < count; i++) {
uint_fast8_t length = lengths[i];
if OF_UNLIKELY (length > maxBit) {
lengthCount = of_realloc(lengthCount,
lengthCount = OFResizeMemory(lengthCount,
length + 1, sizeof(uint16_t));
nextCode = of_realloc(nextCode,
nextCode = OFResizeMemory(nextCode,
length + 1, sizeof(uint16_t));
for (uint_fast8_t j = maxBit + 1; j <= length;
j++) {
lengthCount[j] = 0;
nextCode[j] = 0;
}
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tree = newTree();
for (uint16_t i = 0; i <= maxCode; i++) {
uint8_t length = lengths[i];
if (length > 0)
insertTree(tree, nextCode[length]++, length, i);
treeInsert(tree, nextCode[length]++, length, i);
}
} @finally {
free(lengthCount);
free(nextCode);
OFFreeMemory(lengthCount);
OFFreeMemory(nextCode);
}
return tree;
}
struct of_huffman_tree *
of_huffman_tree_construct_single(uint16_t value)
struct of_huffman_tree *tree = newTree();
OFHuffmanTree tree = newTree();
tree->value = value;
return tree;
}
void
of_huffman_tree_release(struct of_huffman_tree *tree)
of_huffman_tree_release(tree->leaves[i]);
OFHuffmanTreeFree(tree->leaves[i]);
free(tree);
OFFreeMemory(tree);
}
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