* (from partial matches), packed three per word.
*/
-
#ifdef __cplusplus
extern "C" {
#endif
-/* ============================================================ */
-/* Included files */
-
-#ifdef WK_DEBUG
-#include <stdio.h>
-#include <unistd.h>
-#include <math.h>
-#include <strings.h>
-#endif
-
-typedef unsigned int WK_word;
-
-/* at the moment we have dependencies on the page size. That should
- * be changed to work for any power-of-two size that's at least 16
- * words, or something like that
- */
-
-#define PAGE_SIZE_IN_WORDS 1024
-#define PAGE_SIZE_IN_BYTES 4096
-
-#define DICTIONARY_SIZE 16
-
-/*
- * macros defining the basic layout of stuff in a page
- */
-#define HEADER_SIZE_IN_WORDS 3
-#define TAGS_AREA_OFFSET 3
-#define TAGS_AREA_SIZE 64
-
-/* the next few are used during compression to write the header */
-#define SET_QPOS_AREA_START(compr_dest_buf,qpos_start_addr) \
- (compr_dest_buf[0] = qpos_start_addr - compr_dest_buf)
-#define SET_LOW_BITS_AREA_START(compr_dest_buf,lb_start_addr) \
- (compr_dest_buf[1] = lb_start_addr - compr_dest_buf)
-#define SET_LOW_BITS_AREA_END(compr_dest_buf,lb_end_addr) \
- (compr_dest_buf[2] = lb_end_addr - compr_dest_buf)
-
-/* the next few are only use during decompression to read the header */
-#define TAGS_AREA_START(decomp_src_buf) \
- (decomp_src_buf + TAGS_AREA_OFFSET)
-#define TAGS_AREA_END(decomp_src_buf) \
- (TAGS_AREA_START(decomp_src_buf) + TAGS_AREA_SIZE)
-#define FULL_WORD_AREA_START(the_buf) TAGS_AREA_END(the_buf)
-#define QPOS_AREA_START(decomp_src_buf) \
- (decomp_src_buf + decomp_src_buf[0])
-#define LOW_BITS_AREA_START(decomp_src_buf) \
- (decomp_src_buf + (decomp_src_buf[1]))
-#define QPOS_AREA_END(the_buf) LOW_BITS_AREA_START(the_buf)
-#define LOW_BITS_AREA_END(decomp_src_buf) \
- (decomp_src_buf + (decomp_src_buf[2]))
-
-/* ============================================================ */
-/* Types and structures */
+#include <mach/vm_param.h>
-/* A structure to store each element of the dictionary. */
-typedef WK_word DictionaryElement;
-
-/* ============================================================ */
-/* Misc constants */
-
-#define BITS_PER_WORD 32
-#define BYTES_PER_WORD 4
-#define NUM_LOW_BITS 10
-#define LOW_BITS_MASK 0x3FF
-#define ALL_ONES_MASK 0xFFFFFFFF
-
-#define TWO_BITS_PACKING_MASK 0x03030303
-#define FOUR_BITS_PACKING_MASK 0x0F0F0F0F
-#define TEN_LOW_BITS_MASK 0x000003FF
-#define TWENTY_TWO_HIGH_BITS_MASK 0xFFFFFC00
-
-/* Tag values. NOTE THAT CODE MAY DEPEND ON THE NUMBERS USED.
- * Check for conditionals doing arithmetic on these things
- * before changing them
- */
-#define ZERO_TAG 0x0
-#define PARTIAL_TAG 0x1
-#define MISS_TAG 0x2
-#define EXACT_TAG 0x3
-#define BITS_PER_BYTE 8
+#define WKdm_SCRATCH_BUF_SIZE PAGE_SIZE
-/* ============================================================ */
-/* Global macros */
-
-/* Shift out the low bits of a pattern to give the high bits pattern.
- The stripped patterns are used for initial tests of partial
- matches. */
-#define HIGH_BITS(word_pattern) (word_pattern >> NUM_LOW_BITS)
-
-/* String the high bits of a pattern so the low order bits can
- be included in an encoding of a partial match. */
-#define LOW_BITS(word_pattern) (word_pattern & LOW_BITS_MASK)
-
-#if defined DEBUG_WK
-#define DEBUG_PRINT_1(string) printf (string)
-#define DEBUG_PRINT_2(string,value) printf(string, value)
-#else
-#define DEBUG_PRINT_1(string)
-#define DEBUG_PRINT_2(string, value)
-#endif
-
-/* Set up the dictionary before performing compression or
- decompression. Each element is loaded with some value, the
- high-bits version of that value, and a next pointer. */
-#define PRELOAD_DICTIONARY { \
- dictionary[0] = 1; \
- dictionary[1] = 1; \
- dictionary[2] = 1; \
- dictionary[3] = 1; \
- dictionary[4] = 1; \
- dictionary[5] = 1; \
- dictionary[6] = 1; \
- dictionary[7] = 1; \
- dictionary[8] = 1; \
- dictionary[9] = 1; \
- dictionary[10] = 1; \
- dictionary[11] = 1; \
- dictionary[12] = 1; \
- dictionary[13] = 1; \
- dictionary[14] = 1; \
- dictionary[15] = 1; \
-}
-
-/* these are the constants for the hash function lookup table.
- * Only zero maps to zero. The rest of the tabale is the result
- * of appending 17 randomizations of the multiples of 4 from
- * 4 to 56. Generated by a Scheme script in hash.scm.
- */
-#define HASH_LOOKUP_TABLE_CONTENTS { \
- 0, 52, 8, 56, 16, 12, 28, 20, 4, 36, 48, 24, 44, 40, 32, 60, \
- 8, 12, 28, 20, 4, 60, 16, 36, 24, 48, 44, 32, 52, 56, 40, 12, \
- 8, 48, 16, 52, 60, 28, 56, 32, 20, 24, 36, 40, 44, 4, 8, 40, \
- 60, 32, 20, 44, 4, 36, 52, 24, 16, 56, 48, 12, 28, 16, 8, 40, \
- 36, 28, 32, 12, 4, 44, 52, 20, 24, 48, 60, 56, 40, 48, 8, 32, \
- 28, 36, 4, 44, 20, 56, 60, 24, 52, 16, 12, 12, 4, 48, 20, 8, \
- 52, 16, 60, 24, 36, 44, 28, 56, 40, 32, 36, 20, 24, 60, 40, 44, \
- 52, 16, 32, 4, 48, 8, 28, 56, 12, 28, 32, 40, 52, 36, 16, 20, \
- 48, 8, 4, 60, 24, 56, 44, 12, 8, 36, 24, 28, 16, 60, 20, 56, \
- 32, 40, 48, 12, 4, 44, 52, 44, 40, 12, 56, 8, 36, 24, 60, 28, \
- 48, 4, 32, 20, 16, 52, 60, 12, 24, 36, 8, 4, 16, 56, 48, 44, \
- 40, 52, 32, 20, 28, 32, 12, 36, 28, 24, 56, 40, 16, 52, 44, 4, \
- 20, 60, 8, 48, 48, 52, 12, 20, 32, 44, 36, 28, 4, 40, 24, 8, \
- 56, 60, 16, 36, 32, 8, 40, 4, 52, 24, 44, 20, 12, 28, 48, 56, \
- 16, 60, 4, 52, 60, 48, 20, 16, 56, 44, 24, 8, 40, 12, 32, 28, \
- 36, 24, 32, 12, 4, 20, 16, 60, 36, 28, 8, 52, 40, 48, 44, 56 \
-}
-
-#define HASH_TO_DICT_BYTE_OFFSET(pattern) \
- (hashLookupTable[((pattern) >> 10) & 0xFF])
-
-extern const char hashLookupTable[];
-
-/* EMIT... macros emit bytes or words into the intermediate arrays
- */
-
-#define EMIT_BYTE(fill_ptr, byte_value) {*fill_ptr++ = byte_value; }
-#define EMIT_WORD(fill_ptr,word_value) {*fill_ptr++ = word_value; }
-
-/* RECORD... macros record the results of modeling in the intermediate
- * arrays
- */
-
-#define RECORD_ZERO { EMIT_BYTE(next_tag,ZERO_TAG); }
-
-#define RECORD_EXACT(queue_posn) EMIT_BYTE(next_tag,EXACT_TAG); \
- EMIT_BYTE(next_qp,(queue_posn));
-
-#define RECORD_PARTIAL(queue_posn,low_bits_pattern) { \
- EMIT_BYTE(next_tag,PARTIAL_TAG); \
- EMIT_BYTE(next_qp,(queue_posn)); \
- EMIT_WORD(next_low_bits,(low_bits_pattern)) }
-
-#define RECORD_MISS(word_pattern) EMIT_BYTE(next_tag,MISS_TAG); \
- EMIT_WORD(next_full_patt,(word_pattern));
-
+typedef unsigned int WK_word;
-#define WKdm_SCRATCH_BUF_SIZE 4096
void
WKdm_decompress_new (WK_word* src_buf,
- WK_word* dest_buf,
- WK_word* scratch,
- unsigned int bytes);
+ WK_word* dest_buf,
+ WK_word* scratch,
+ unsigned int bytes);
int
WKdm_compress_new (WK_word* src_buf,
- WK_word* dest_buf,
- WK_word* scratch,
- unsigned int limit);
+ WK_word* dest_buf,
+ WK_word* scratch,
+ unsigned int limit);
#ifdef __cplusplus
} /* extern "C" */
projects / apple / xnu.git / blobdiff