388 lines
11 KiB
C
388 lines
11 KiB
C
|
|
/*
|
|
********************************************************************
|
|
* COPYRIGHT:
|
|
* (C) Copyright Taligent, Inc., 1997
|
|
* (C) Copyright International Business Machines Corporation, 1997 - 1998
|
|
* Licensed Material - Program-Property of IBM - All Rights Reserved.
|
|
* US Government Users Restricted Rights - Use, duplication, or disclosure
|
|
* restricted by GSA ADP Schedule Contract with IBM Corp.
|
|
*
|
|
********************************************************************
|
|
*/
|
|
|
|
#ifndef _STDLIB_H
|
|
#include <stdlib.h>
|
|
#endif
|
|
|
|
#ifndef _STDIO_H
|
|
#include <stdio.h>
|
|
#endif
|
|
|
|
|
|
#include "ucmp8.h"
|
|
#include "cmemory.h"
|
|
|
|
static int32_t findOverlappingPosition(CompactByteArray* this_obj,
|
|
uint32_t start,
|
|
const UChar *tempIndex,
|
|
int32_t tempIndexCount,
|
|
uint32_t cycle);
|
|
|
|
/* internal constants*/
|
|
|
|
#define kUnicodeCount_int 65536
|
|
#define kBlockShift_int 7
|
|
#define kBlockCount_int (1<<kBlockShift_int)
|
|
#define kIndexShift_int (16-kBlockShift_int)
|
|
#define kIndexCount_int (1<<kIndexShift_int)
|
|
#define kBlockMask_int (kBlockCount_int-1)
|
|
|
|
const int32_t UCMP8_kUnicodeCount = kUnicodeCount_int;
|
|
const int32_t UCMP8_kBlockShift = kBlockShift_int;
|
|
const int32_t UCMP8_kBlockCount = kBlockCount_int;
|
|
const int32_t UCMP8_kIndexShift = kIndexShift_int;
|
|
const int32_t UCMP8_kIndexCount = kIndexCount_int;
|
|
const uint32_t UCMP8_kBlockMask = kBlockMask_int;
|
|
|
|
|
|
int32_t ucmp8_getkUnicodeCount() { return UCMP8_kUnicodeCount;}
|
|
int32_t ucmp8_getkBlockCount() { return UCMP8_kBlockCount;}
|
|
/* debug flags*/
|
|
/*=======================================================*/
|
|
U_CAPI int8_t ucmp8_get(CompactByteArray* array, uint16_t index)
|
|
{
|
|
return (array->fArray[(array->fIndex[index >> UCMP8_kBlockShift] & 0xFFFF) + (index & UCMP8_kBlockMask)]);
|
|
}
|
|
U_CAPI uint8_t ucmp8_getu(CompactByteArray* array, uint16_t index)
|
|
{
|
|
return (uint8_t)ucmp8_get(array,index);
|
|
}
|
|
|
|
CompactByteArray* ucmp8_open(int8_t defaultValue)
|
|
{
|
|
/* set up the index array and the data array.
|
|
* the index array always points into particular parts of the data array
|
|
* it is initially set up to point at regular block boundaries
|
|
* The following example uses blocks of 4 for simplicity
|
|
* Example: Expanded
|
|
* INDEX# 0 1 2 3 4
|
|
* INDEX 0 4 8 12 16 ...
|
|
* ARRAY abcdeababcedzyabcdea...
|
|
* | | | | | |...
|
|
* whenever you set an element in the array, it unpacks to this state
|
|
* After compression, the index will point to various places in the data array
|
|
* wherever there is a runs of the same elements as in the original
|
|
* Example: Compressed
|
|
* INDEX# 0 1 2 3 4
|
|
* INDEX 0 4 1 8 2 ...
|
|
* ARRAY abcdeabazyabc...
|
|
* If you look at the example, index# 2 in the expanded version points
|
|
* to data position number 8, which has elements "bced". In the compressed
|
|
* version, index# 2 points to data position 1, which also has "bced"
|
|
*/
|
|
CompactByteArray* this_obj = (CompactByteArray*) icu_malloc(sizeof(CompactByteArray));
|
|
int32_t i;
|
|
|
|
if (this_obj == NULL) return NULL;
|
|
|
|
this_obj->fArray = NULL;
|
|
this_obj->fIndex = NULL;
|
|
this_obj->fCount = UCMP8_kUnicodeCount;
|
|
this_obj->fCompact = FALSE;
|
|
this_obj->fBogus = FALSE;
|
|
|
|
|
|
this_obj->fArray = (int8_t*) icu_malloc(sizeof(int8_t) * UCMP8_kUnicodeCount);
|
|
if (!this_obj->fArray)
|
|
{
|
|
this_obj->fBogus = TRUE;
|
|
return NULL;
|
|
}
|
|
this_obj->fIndex = (uint16_t*) icu_malloc(sizeof(uint16_t) * UCMP8_kIndexCount);
|
|
if (!this_obj->fIndex)
|
|
{
|
|
icu_free(this_obj->fArray);
|
|
this_obj->fArray = NULL;
|
|
this_obj->fBogus = TRUE;
|
|
return NULL;
|
|
}
|
|
for (i = 0; i < UCMP8_kUnicodeCount; ++i)
|
|
{
|
|
this_obj->fArray[i] = defaultValue;
|
|
}
|
|
for (i = 0; i < UCMP8_kIndexCount; ++i)
|
|
{
|
|
this_obj->fIndex[i] = (uint16_t)(i << UCMP8_kBlockShift);
|
|
}
|
|
|
|
return this_obj;
|
|
}
|
|
|
|
CompactByteArray* ucmp8_openAdopt(uint16_t *indexArray,
|
|
int8_t *newValues,
|
|
int32_t count)
|
|
{
|
|
CompactByteArray* this_obj = (CompactByteArray*) icu_malloc(sizeof(CompactByteArray));
|
|
if (!this_obj) return NULL;
|
|
|
|
this_obj->fArray = NULL;
|
|
this_obj->fIndex = NULL;
|
|
this_obj->fCount = count;
|
|
this_obj->fBogus = FALSE;
|
|
|
|
this_obj->fArray = newValues;
|
|
this_obj->fIndex = indexArray;
|
|
this_obj->fCompact = (count < UCMP8_kUnicodeCount) ? TRUE : FALSE;
|
|
|
|
return this_obj;
|
|
}
|
|
|
|
/*=======================================================*/
|
|
|
|
void ucmp8_close(CompactByteArray* this_obj)
|
|
{
|
|
icu_free(this_obj->fArray);
|
|
this_obj->fArray = NULL;
|
|
icu_free(this_obj->fIndex);
|
|
this_obj->fIndex = NULL;
|
|
this_obj->fCount = 0;
|
|
this_obj->fCompact = FALSE;
|
|
icu_free(this_obj);
|
|
}
|
|
|
|
|
|
/*=======================================================*/
|
|
|
|
void ucmp8_expand(CompactByteArray* this_obj)
|
|
{
|
|
/* can optimize later.
|
|
* if we have to expand, then walk through the blocks instead of using Get
|
|
* this code unpacks the array by copying the blocks to the normalized position.
|
|
* Example: Compressed
|
|
* INDEX# 0 1 2 3 4
|
|
* INDEX 0 4 1 8 2 ...
|
|
* ARRAY abcdeabazyabc...
|
|
* turns into
|
|
* Example: Expanded
|
|
* INDEX# 0 1 2 3 4
|
|
* INDEX 0 4 8 12 16 ...
|
|
* ARRAY abcdeababcedzyabcdea...
|
|
*/
|
|
int32_t i;
|
|
if (this_obj->fCompact)
|
|
{
|
|
int8_t* tempArray;
|
|
tempArray = (int8_t*) icu_malloc(sizeof(int8_t) * UCMP8_kUnicodeCount);
|
|
if (!tempArray)
|
|
{
|
|
this_obj->fBogus = TRUE;
|
|
return;
|
|
}
|
|
for (i = 0; i < UCMP8_kUnicodeCount; ++i)
|
|
{
|
|
tempArray[i] = ucmp8_get(this_obj,(UChar)i); /* HSYS : How expand?*/
|
|
}
|
|
for (i = 0; i < UCMP8_kIndexCount; ++i)
|
|
{
|
|
this_obj->fIndex[i] = (uint16_t)(i<< UCMP8_kBlockShift);
|
|
}
|
|
icu_free(this_obj->fArray);
|
|
this_obj->fArray = tempArray;
|
|
this_obj->fCompact = FALSE;
|
|
}
|
|
}
|
|
|
|
|
|
/*=======================================================*/
|
|
/* this_obj->fArray: an array to be overlapped
|
|
* start and count: specify the block to be overlapped
|
|
* tempIndex: the overlapped array (actually indices back into inputContents)
|
|
* inputHash: an index of hashes for tempIndex, where
|
|
* inputHash[i] = XOR of values from i-count+1 to i
|
|
*/
|
|
int32_t
|
|
findOverlappingPosition(CompactByteArray* this_obj,
|
|
uint32_t start,
|
|
const UChar* tempIndex,
|
|
int32_t tempIndexCount,
|
|
uint32_t cycle)
|
|
{
|
|
/* this_obj is a utility routine for finding blocks that overlap.
|
|
* IMPORTANT: the cycle number is very important. Small cycles take a lot
|
|
* longer to work. In some cases, they may be able to get better compaction.
|
|
*/
|
|
|
|
int32_t i;
|
|
int32_t j;
|
|
int32_t currentCount;
|
|
|
|
for (i = 0; i < tempIndexCount; i += cycle)
|
|
{
|
|
currentCount = UCMP8_kBlockCount;
|
|
if (i + UCMP8_kBlockCount > tempIndexCount)
|
|
{
|
|
currentCount = tempIndexCount - i;
|
|
}
|
|
for (j = 0; j < currentCount; ++j)
|
|
{
|
|
if (this_obj->fArray[start + j] != this_obj->fArray[tempIndex[i + j]]) break;
|
|
}
|
|
if (j == currentCount) break;
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
bool_t
|
|
ucmp8_isBogus(const CompactByteArray* this_obj)
|
|
{
|
|
return this_obj->fBogus;
|
|
}
|
|
|
|
const int8_t*
|
|
ucmp8_getArray(const CompactByteArray* this_obj)
|
|
{
|
|
return this_obj->fArray;
|
|
}
|
|
|
|
const uint16_t*
|
|
ucmp8_getIndex(const CompactByteArray* this_obj)
|
|
{
|
|
return this_obj->fIndex;
|
|
}
|
|
|
|
int32_t
|
|
ucmp8_getCount(const CompactByteArray* this_obj)
|
|
{
|
|
return this_obj->fCount;
|
|
}
|
|
|
|
|
|
void
|
|
ucmp8_set(CompactByteArray* this_obj,
|
|
UChar c,
|
|
int8_t value)
|
|
{
|
|
if (this_obj->fCompact == TRUE)
|
|
{
|
|
ucmp8_expand(this_obj);
|
|
if (this_obj->fBogus) return;
|
|
}
|
|
this_obj->fArray[(int32_t)c] = value;
|
|
}
|
|
|
|
|
|
void
|
|
ucmp8_setRange(CompactByteArray* this_obj,
|
|
UChar start,
|
|
UChar end,
|
|
int8_t value)
|
|
{
|
|
int32_t i;
|
|
if (this_obj->fCompact == TRUE)
|
|
{
|
|
ucmp8_expand(this_obj);
|
|
if (this_obj->fBogus) return;
|
|
}
|
|
for (i = start; i <= end; ++i)
|
|
{
|
|
this_obj->fArray[i] = value;
|
|
}
|
|
}
|
|
|
|
|
|
/*=======================================================*/
|
|
|
|
void
|
|
ucmp8_compact(CompactByteArray* this_obj,
|
|
uint32_t cycle)
|
|
{
|
|
if (!this_obj->fCompact)
|
|
{
|
|
/* this_obj actually does the compaction.
|
|
* it walks throught the contents of the expanded array, finding the
|
|
* first block in the data that matches the contents of the current index.
|
|
* As it works, it keeps an updated pointer to the last position,
|
|
* so that it knows how big to make the final array
|
|
* If the matching succeeds, then the index will point into the data
|
|
* at some earlier position.
|
|
* If the matching fails, then last position pointer will be bumped,
|
|
* and the index will point to that last block of data.
|
|
*/
|
|
UChar* tempIndex;
|
|
int32_t tempIndexCount;
|
|
int8_t* tempArray;
|
|
int32_t iBlock, iIndex;
|
|
|
|
/* fix cycle, must be 0 < cycle <= blockcount*/
|
|
if (cycle < 0) cycle = 1;
|
|
else if (cycle > (uint32_t)UCMP8_kBlockCount) cycle = UCMP8_kBlockCount;
|
|
|
|
/* make temp storage, larger than we need*/
|
|
tempIndex = (UChar*) icu_malloc(sizeof(UChar)* UCMP8_kUnicodeCount);
|
|
if (!tempIndex)
|
|
{
|
|
this_obj->fBogus = TRUE;
|
|
return;
|
|
}
|
|
/* set up first block.*/
|
|
tempIndexCount = UCMP8_kBlockCount;
|
|
for (iIndex = 0; iIndex < UCMP8_kBlockCount; ++iIndex)
|
|
{
|
|
tempIndex[iIndex] = (uint16_t)iIndex;
|
|
}; /* endfor (iIndex = 0; .....)*/
|
|
this_obj->fIndex[0] = 0;
|
|
|
|
/* for each successive block, find out its first position in the compacted array*/
|
|
for (iBlock = 1; iBlock < UCMP8_kIndexCount; ++iBlock)
|
|
{
|
|
int32_t newCount, firstPosition, block;
|
|
block = iBlock << UCMP8_kBlockShift;
|
|
/* if (debugSmall) if (block > debugSmallLimit) break;*/
|
|
firstPosition = findOverlappingPosition(this_obj,
|
|
block,
|
|
tempIndex,
|
|
tempIndexCount,
|
|
cycle);
|
|
|
|
/* if not contained in the current list, copy the remainder
|
|
* invariant; cumulativeHash[iBlock] = XOR of values from iBlock-kBlockCount+1 to iBlock
|
|
* we do this_obj by XORing out cumulativeHash[iBlock-kBlockCount]
|
|
*/
|
|
newCount = firstPosition + UCMP8_kBlockCount;
|
|
if (newCount > tempIndexCount)
|
|
{
|
|
for (iIndex = tempIndexCount; iIndex < newCount; ++iIndex)
|
|
{
|
|
tempIndex[iIndex] = (uint16_t)(iIndex - firstPosition + block);
|
|
} /* endfor (iIndex = tempIndexCount....)*/
|
|
tempIndexCount = newCount;
|
|
} /* endif (newCount > tempIndexCount)*/
|
|
this_obj->fIndex[iBlock] = (uint16_t)firstPosition;
|
|
} /* endfor (iBlock = 1.....)*/
|
|
|
|
/* now allocate and copy the items into the array*/
|
|
tempArray = (int8_t*) icu_malloc(tempIndexCount * sizeof(int8_t));
|
|
if (!tempArray)
|
|
{
|
|
this_obj->fBogus = TRUE;
|
|
icu_free(tempIndex);
|
|
return;
|
|
}
|
|
for (iIndex = 0; iIndex < tempIndexCount; ++iIndex)
|
|
{
|
|
tempArray[iIndex] = this_obj->fArray[tempIndex[iIndex]];
|
|
}
|
|
icu_free(this_obj->fArray);
|
|
this_obj->fArray = tempArray;
|
|
this_obj->fCount = tempIndexCount;
|
|
|
|
|
|
/* free up temp storage*/
|
|
icu_free(tempIndex);
|
|
this_obj->fCompact = TRUE;
|
|
} /* endif (!this_obj->fCompact)*/
|
|
}
|
|
|