20 #define LZNT_CHUNK_SIZE		0x1000
41 	size_t len = 0;  in get_match_len()
51 	size_t len1 = 0, len2 = 0;  in longest_match_std()
55 		((40543U * ((((src[0] << 4) ^ src[1]) << 4) ^ src[2])) >> 4) &  in longest_match_std()
60 	if (hash[0] >= ctx->unc && hash[0] < src && hash[0][0] == src[0] &&  in longest_match_std()
61 	    hash[0][1] == src[1] && hash[0][2] == src[2]) {  in longest_match_std()
65 					      hash[0] + 3, ctx->max_len - 3);  in longest_match_std()
68 	if (hash[1] >= ctx->unc && hash[1] < src && hash[1][0] == src[0] &&  in longest_match_std()
81 		ctx->best_match = hash[0];  in longest_match_std()
84 	hash[1] = hash[0];  in longest_match_std()
85 	hash[0] = src;  in longest_match_std()
95 		return 0;  in longest_match_best()
97 	max_len = 0;  in longest_match_best()
107 	return max_len >= 3 ? max_len : 0;  in longest_match_best()
111 	0x1002, 0x802, 0x402, 0x202, 0x102, 0x82, 0x42, 0x22, 0x12,
115 	0x10, 0x20, 0x40, 0x80, 0x100, 0x200, 0x400, 0x800, 0x1000,
134  * * 0	- Ok, @cmpr contains @cmpr_chunk_size bytes of compressed data.
143 	size_t cnt = 0;  in compress_chunk()
144 	size_t idx = 0;  in compress_chunk()
148 	u8 not_zero = 0;  in compress_chunk()
149 	/* Control byte of 8-bit values: ( 0 - means byte as is, 1 - short pair ). */  in compress_chunk()
150 	u8 ohdr = 0;  in compress_chunk()
161 	ctx->max_len = s_max_len[0];  in compress_chunk()
170 		max_len = up + 3 <= unc_end ? (*match)(up, ctx) : 0;  in compress_chunk()
190 			ohdr = 0;  in compress_chunk()
203 	t16 = (*cmpr_chunk_size - 3) | 0xB000;  in compress_chunk()
204 	cmpr[0] = t16;  in compress_chunk()
207 	return not_zero ? 0 : LZNT_ERROR_ALL_ZEROS;  in compress_chunk()
216 	 * 0x3FFF == ((LZNT_CHUNK_SIZE + 2 - 3) | 0x3000)  in compress_chunk()
218 	cmpr[0] = 0xff;  in compress_chunk()
219 	cmpr[1] = 0x3f;  in compress_chunk()
224 	return 0;  in compress_chunk()
232 	size_t bit = 0;  in decompress_chunk()
233 	size_t index = 0;  in decompress_chunk()
257 		pair |= cmpr[0];  in decompress_chunk()
273 		for (; length > 0; length--, up++)  in decompress_chunk()
294  * @level: 0 - Standard compression.
295  *	   !0 - Best compression, requires a lot of cpu.
313  * * 0 - Input buffer is full zero.
328 		memset(ctx->hash, 0, sizeof(ctx->hash));  in compress_lznt()
335 		cmpr_size = 0;  in compress_lznt()
338 		if (err < 0)  in compress_lznt()
348 		p[0] = p[1] = 0;  in compress_lznt()
350 	return is_zero ? 0 : PtrOffset(cmpr, p);  in compress_lznt()
371 	chunk_hdr |= cmpr_chunk[0];  in decompress_lznt()
384 		if (chunk_hdr & 0x8000) {  in decompress_lznt()
390 			if (err < 0)  in decompress_lznt()
425 		chunk_hdr |= cmpr_chunk[0];  in decompress_lznt()
439 			memset(unc_chunk, 0, t1);  in decompress_lznt()