| /* |
| ***************************************************************************************** |
| * |
| * Copyright (C) 1997-200, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ***************************************************************************************** |
| */ |
| /*=============================================================================== |
| * |
| * File cmpshrta.cpp |
| * |
| * Modification History: |
| * |
| * Date Name Description |
| * 2/5/97 aliu Added CompactIntArray streamIn and streamOut methods. |
| * 3/4/97 aliu Tuned performance of CompactIntArray constructor, |
| * 05/07/97 helena Added isBogus() |
| * based on performance data indicating that this was slow. |
| * 07/15/98 erm Synched with Java 1.2 CompactShortArray.java. |
| * 07/30/98 erm Added changes from 07/29/98 code review. |
| *=============================================================================== |
| */ |
| #include "ucmp16.h" |
| #include "cmemory.h" |
| |
| |
| |
| |
| |
| #define arrayRegionMatches(source, sourceStart, target, targetStart, len) (uprv_memcmp(&source[sourceStart], &target[targetStart], len * sizeof(int16_t)) != 0) |
| |
| /* internal constants*/ |
| #define UCMP16_kMaxUnicode_int 65535 |
| #define UCMP16_kUnicodeCount_int (UCMP16_kMaxUnicode_int + 1) |
| #define UCMP16_kBlockShift_int 7 |
| #define UCMP16_kBlockCount_int (1 << UCMP16_kBlockShift_int) |
| #define UCMP16_kBlockBytes_int (UCMP16_kBlockCount_int * sizeof(int16_t)) |
| #define UCMP16_kIndexShift_int (16 - UCMP16_kBlockShift_int) |
| #define UCMP16_kIndexCount_int (1 << UCMP16_kIndexShift_int) |
| #define UCMP16_kBlockMask_int (UCMP16_kBlockCount_int - 1) |
| |
| |
| const int32_t UCMP16_kMaxUnicode = UCMP16_kMaxUnicode_int; |
| const int32_t UCMP16_kUnicodeCount = UCMP16_kUnicodeCount_int; |
| const int32_t UCMP16_kBlockShift = UCMP16_kBlockShift_int; |
| const int32_t UCMP16_kBlockCount = UCMP16_kBlockCount_int; |
| const int32_t UCMP16_kBlockBytes = UCMP16_kBlockBytes_int; |
| const int32_t UCMP16_kIndexShift = UCMP16_kIndexShift_int; |
| const int32_t UCMP16_kIndexCount = UCMP16_kIndexCount_int; |
| const uint32_t UCMP16_kBlockMask = UCMP16_kBlockMask_int; |
| |
| /** |
| * Sets the array to the invalid memory state. |
| */ |
| static CompactShortArray* setToBogus(CompactShortArray* array); |
| static void touchBlock(CompactShortArray* this, |
| int32_t i, |
| int16_t value); |
| static UBool blockTouched(const CompactShortArray* this, |
| int32_t i); |
| |
| |
| /* debug flags*/ |
| /*=======================================================*/ |
| |
| int32_t ucmp16_getkUnicodeCount() |
| {return UCMP16_kUnicodeCount;} |
| |
| int32_t ucmp16_getkBlockCount() |
| {return UCMP16_kBlockCount;} |
| |
| int32_t ucmp16_getkIndexCount() |
| { return UCMP16_kIndexCount;} |
| |
| CompactShortArray* ucmp16_open(int16_t defaultValue) |
| { |
| int32_t i; |
| CompactShortArray* this = (CompactShortArray*) uprv_malloc(sizeof(CompactShortArray)); |
| if (this == NULL) return NULL; |
| |
| this->fCount = UCMP16_kUnicodeCount; |
| this->fCompact = FALSE; |
| this->fBogus = FALSE; |
| this->fArray = NULL; |
| this->fIndex = NULL; |
| this->fHashes = NULL; |
| this->fDefaultValue = defaultValue; |
| |
| this->fArray = (int16_t*)uprv_malloc(UCMP16_kUnicodeCount * sizeof(int16_t)); |
| if (this->fArray == NULL) |
| { |
| this->fBogus = TRUE; |
| return NULL; |
| } |
| |
| this->fIndex = (uint16_t*)uprv_malloc(UCMP16_kIndexCount * sizeof(uint16_t)); |
| if (this->fIndex == NULL) |
| { |
| uprv_free(this->fArray); |
| this->fArray = NULL; |
| |
| this->fBogus = TRUE; |
| return NULL; |
| } |
| |
| this->kBlockShift = UCMP16_kBlockShift; |
| this->kBlockMask = UCMP16_kBlockMask; |
| for (i = 0; i < UCMP16_kUnicodeCount; i += 1) |
| { |
| this->fArray[i] = defaultValue; |
| } |
| |
| this->fHashes =(int32_t*)uprv_malloc(UCMP16_kIndexCount * sizeof(int32_t)); |
| if (this->fHashes == NULL) |
| { |
| uprv_free(this->fArray); |
| uprv_free(this->fIndex); |
| this->fBogus = TRUE; |
| return NULL; |
| } |
| |
| for (i = 0; i < UCMP16_kIndexCount; i += 1) |
| { |
| this->fIndex[i] = (uint16_t)(i << UCMP16_kBlockShift); |
| this->fHashes[i] = 0; |
| } |
| |
| return this; |
| } |
| |
| CompactShortArray* ucmp16_openAdopt(uint16_t *indexArray, |
| int16_t *newValues, |
| int32_t count, |
| int16_t defaultValue) |
| { |
| CompactShortArray* this = (CompactShortArray*) uprv_malloc(sizeof(CompactShortArray)); |
| if (this == NULL) return NULL; |
| this->fHashes = NULL; |
| this->fCount = count; |
| this->fDefaultValue = defaultValue; |
| this->fBogus = FALSE; |
| this->fArray = newValues; |
| this->fIndex = indexArray; |
| this->fCompact = count < UCMP16_kUnicodeCount; |
| this->kBlockShift = UCMP16_kBlockShift; |
| this->kBlockMask = UCMP16_kBlockMask; |
| |
| return this; |
| } |
| |
| CompactShortArray* ucmp16_openAdoptWithBlockShift(uint16_t *indexArray, |
| int16_t *newValues, |
| int32_t count, |
| int16_t defaultValue, |
| int32_t blockShift) |
| { |
| CompactShortArray* this = ucmp16_openAdopt(indexArray, |
| newValues, |
| count, |
| defaultValue); |
| if (this == NULL) return NULL; |
| |
| this->kBlockShift = blockShift; |
| this->kBlockMask = (uint32_t) (((uint32_t)1 << (uint32_t)blockShift) - (uint32_t)1); |
| |
| return this; |
| } |
| |
| /*=======================================================*/ |
| |
| void ucmp16_close(CompactShortArray* this) |
| { |
| uprv_free(this->fArray); |
| uprv_free(this->fIndex); |
| uprv_free(this->fHashes); |
| uprv_free(this); |
| |
| return; |
| } |
| |
| CompactShortArray* setToBogus(CompactShortArray* this) |
| { |
| uprv_free(this->fArray); |
| this->fArray = NULL; |
| |
| uprv_free(this->fIndex); |
| this->fIndex = NULL; |
| |
| uprv_free(this->fHashes); |
| this->fHashes = NULL; |
| |
| this->fCount = 0; |
| this->fCompact = FALSE; |
| this->fBogus = TRUE; |
| |
| return this; |
| } |
| |
| |
| void ucmp16_expand(CompactShortArray* this) |
| { |
| if (this->fCompact) |
| { |
| int32_t i; |
| int16_t *tempArray = (int16_t*)uprv_malloc(UCMP16_kUnicodeCount * sizeof(int16_t)); |
| |
| if (tempArray == NULL) |
| { |
| this->fBogus = TRUE; |
| return; |
| } |
| |
| for (i = 0; i < UCMP16_kUnicodeCount; i += 1) |
| { |
| tempArray[i] = ucmp16_get(this, (UChar)i); /* HSYS : How expand?*/ |
| } |
| |
| for (i = 0; i < (1 << (16 - this->kBlockShift)); i += 1) |
| { |
| this->fIndex[i] = (uint16_t)(i<<this->kBlockShift); |
| } |
| |
| uprv_free(this->fArray); |
| this->fArray = tempArray; |
| this->fCompact = FALSE; |
| } |
| } |
| |
| void ucmp16_set(CompactShortArray* this, |
| UChar c, |
| int16_t value) |
| { |
| if (this->fCompact) |
| { |
| ucmp16_expand(this); |
| if (this->fBogus) return; |
| } |
| |
| this->fArray[(int32_t)c] = value; |
| |
| if (value != this->fDefaultValue) |
| { |
| touchBlock(this, c >> this->kBlockShift, value); |
| } |
| } |
| |
| |
| void ucmp16_setRange(CompactShortArray* this, |
| UChar start, |
| UChar end, |
| int16_t value) |
| { |
| int32_t i; |
| if (this->fCompact) |
| { |
| ucmp16_expand(this); |
| if (this->fBogus) return; |
| } |
| if (value != this->fDefaultValue) |
| { |
| for (i = start; i <= end; i += 1) |
| { |
| this->fArray[i] = value; |
| touchBlock(this, i >> this->kBlockShift, value); |
| } |
| } |
| else |
| { |
| for (i = start; i <= end; i += 1) this->fArray[i] = value; |
| } |
| } |
| |
| |
| /*=======================================================*/ |
| void ucmp16_compact(CompactShortArray* this) |
| { |
| if (!this->fCompact) |
| { |
| int32_t limitCompacted = 0; |
| int32_t i, iBlockStart; |
| int16_t iUntouched = -1; |
| |
| for (i = 0, iBlockStart = 0; i < (1 << (16 - this->kBlockShift)); i += 1, iBlockStart += (1 << this->kBlockShift)) |
| { |
| UBool touched = blockTouched(this, i); |
| |
| this->fIndex[i] = 0xFFFF; |
| |
| if (!touched && iUntouched != -1) |
| { |
| /* If no values in this block were set, we can just set its |
| * index to be the same as some other block with no values |
| * set, assuming we've seen one yet. |
| */ |
| this->fIndex[i] = iUntouched; |
| } |
| else |
| { |
| int32_t j, jBlockStart; |
| |
| for (j = 0, jBlockStart = 0; |
| j < limitCompacted; |
| j += 1, jBlockStart += (1 << this->kBlockShift)) |
| { |
| if (this->fHashes[i] == this->fHashes[j] && |
| arrayRegionMatches(this->fArray, |
| iBlockStart, |
| this->fArray, |
| jBlockStart, |
| (1 << this->kBlockShift))) |
| { |
| this->fIndex[i] = (int16_t)jBlockStart; |
| } |
| } |
| |
| /* TODO: verify this is correct*/ |
| if (this->fIndex[i] == 0xFFFF) |
| { |
| /* we didn't match, so copy & update*/ |
| uprv_memcpy(&(this->fArray[jBlockStart]), |
| &(this->fArray[iBlockStart]), |
| (1 << this->kBlockShift)*sizeof(int16_t)); |
| |
| this->fIndex[i] = (int16_t)jBlockStart; |
| this->fHashes[j] = this->fHashes[i]; |
| limitCompacted += 1; |
| |
| if (!touched) |
| { |
| /* If this is the first untouched block we've seen,*/ |
| /* remember its index.*/ |
| iUntouched = (int16_t)jBlockStart; |
| } |
| } |
| } |
| } |
| |
| /* we are done compacting, so now make the array shorter*/ |
| { |
| int32_t newSize = limitCompacted * (1 << this->kBlockShift); |
| int16_t *result = (int16_t*) uprv_malloc(sizeof(int16_t) * newSize); |
| |
| uprv_memcpy(result, this->fArray, newSize * sizeof(int16_t)); |
| |
| uprv_free(this->fArray); |
| this->fArray = result; |
| this->fCount = newSize; |
| uprv_free(this->fHashes); |
| this->fHashes = NULL; |
| |
| this->fCompact = TRUE; |
| } |
| } |
| } |
| |
| /** |
| * Query whether a specified block was "touched", i.e. had a value set. |
| * Untouched blocks can be skipped when compacting the array |
| */ |
| |
| int16_t ucmp16_getDefaultValue(const CompactShortArray* this) |
| { |
| return this->fDefaultValue; |
| } |
| |
| |
| void touchBlock(CompactShortArray* this, |
| int32_t i, |
| int16_t value) |
| { |
| this->fHashes[i] = (this->fHashes[i] + (value << 1)) | 1; |
| } |
| |
| UBool blockTouched(const CompactShortArray* this, int32_t i) |
| { |
| return (this->fHashes[i] != 0); |
| } |
| |
| |
| const int16_t* |
| ucmp16_getArray(const CompactShortArray* this) |
| { |
| return this->fArray; |
| } |
| |
| const uint16_t* |
| ucmp16_getIndex(const CompactShortArray* this) |
| { |
| return this->fIndex; |
| } |
| |
| uint32_t |
| ucmp16_getCount(const CompactShortArray* this) |
| { |
| return this->fCount; |
| } |
| |