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godot/thirdparty/icu4c/common/utrie_swap.cpp
bruvzg b64df2bf74
Update HarfBuzz, ICU and FreeType 
HarfBuzz: Update to version 7.3.0
ICU4C: Update to version 73.1
FreeType: Update to version 2.13.0
2023-05-23 03:26:16 +03:00

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// © 2018 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
// utrie_swap.cpp
// created: 2018aug08 Markus W. Scherer
#include "unicode/utypes.h"
#include "cmemory.h"
#include "ucptrie_impl.h"
#include "udataswp.h"
#include "utrie.h"
#include "utrie2_impl.h"
// These functions for swapping different generations of ICU code point tries are here
// so that their implementation files need not depend on swapper code,
// need not depend on each other, and so that other swapper code
// need not depend on other trie code.
namespace {
constexpr int32_t ASCII_LIMIT = 0x80;
} // namespace
U_CAPI int32_t U_EXPORT2
utrie_swap(const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode) {
const UTrieHeader *inTrie;
UTrieHeader trie;
int32_t size;
UBool dataIs32;
if(pErrorCode==nullptr || U_FAILURE(*pErrorCode)) {
return 0;
}
if(ds==nullptr || inData==nullptr || (length>=0 && outData==nullptr)) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
/* setup and swapping */
if(length>=0 && (uint32_t)length<sizeof(UTrieHeader)) {
*pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
return 0;
}
inTrie=(const UTrieHeader *)inData;
trie.signature=ds->readUInt32(inTrie->signature);
trie.options=ds->readUInt32(inTrie->options);
trie.indexLength=udata_readInt32(ds, inTrie->indexLength);
trie.dataLength=udata_readInt32(ds, inTrie->dataLength);
if( trie.signature!=0x54726965 ||
(trie.options&UTRIE_OPTIONS_SHIFT_MASK)!=UTRIE_SHIFT ||
((trie.options>>UTRIE_OPTIONS_INDEX_SHIFT)&UTRIE_OPTIONS_SHIFT_MASK)!=UTRIE_INDEX_SHIFT ||
trie.indexLength<UTRIE_BMP_INDEX_LENGTH ||
(trie.indexLength&(UTRIE_SURROGATE_BLOCK_COUNT-1))!=0 ||
trie.dataLength<UTRIE_DATA_BLOCK_LENGTH ||
(trie.dataLength&(UTRIE_DATA_GRANULARITY-1))!=0 ||
((trie.options&UTRIE_OPTIONS_LATIN1_IS_LINEAR)!=0 && trie.dataLength<(UTRIE_DATA_BLOCK_LENGTH+0x100))
) {
*pErrorCode=U_INVALID_FORMAT_ERROR; /* not a UTrie */
return 0;
}
dataIs32=(UBool)((trie.options&UTRIE_OPTIONS_DATA_IS_32_BIT)!=0);
size=sizeof(UTrieHeader)+trie.indexLength*2+trie.dataLength*(dataIs32?4:2);
if(length>=0) {
UTrieHeader *outTrie;
if(length<size) {
*pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
return 0;
}
outTrie=(UTrieHeader *)outData;
/* swap the header */
ds->swapArray32(ds, inTrie, sizeof(UTrieHeader), outTrie, pErrorCode);
/* swap the index and the data */
if(dataIs32) {
ds->swapArray16(ds, inTrie+1, trie.indexLength*2, outTrie+1, pErrorCode);
ds->swapArray32(ds, (const uint16_t *)(inTrie+1)+trie.indexLength, trie.dataLength*4,
(uint16_t *)(outTrie+1)+trie.indexLength, pErrorCode);
} else {
ds->swapArray16(ds, inTrie+1, (trie.indexLength+trie.dataLength)*2, outTrie+1, pErrorCode);
}
}
return size;
}
U_CAPI int32_t U_EXPORT2
utrie2_swap(const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode) {
const UTrie2Header *inTrie;
UTrie2Header trie;
int32_t dataLength, size;
UTrie2ValueBits valueBits;
if(U_FAILURE(*pErrorCode)) {
return 0;
}
if(ds==nullptr || inData==nullptr || (length>=0 && outData==nullptr)) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
/* setup and swapping */
if(length>=0 && length<(int32_t)sizeof(UTrie2Header)) {
*pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
return 0;
}
inTrie=(const UTrie2Header *)inData;
trie.signature=ds->readUInt32(inTrie->signature);
trie.options=ds->readUInt16(inTrie->options);
trie.indexLength=ds->readUInt16(inTrie->indexLength);
trie.shiftedDataLength=ds->readUInt16(inTrie->shiftedDataLength);
valueBits=(UTrie2ValueBits)(trie.options&UTRIE2_OPTIONS_VALUE_BITS_MASK);
dataLength=(int32_t)trie.shiftedDataLength<<UTRIE2_INDEX_SHIFT;
if( trie.signature!=UTRIE2_SIG ||
valueBits<0 || UTRIE2_COUNT_VALUE_BITS<=valueBits ||
trie.indexLength<UTRIE2_INDEX_1_OFFSET ||
dataLength<UTRIE2_DATA_START_OFFSET
) {
*pErrorCode=U_INVALID_FORMAT_ERROR; /* not a UTrie */
return 0;
}
size=sizeof(UTrie2Header)+trie.indexLength*2;
switch(valueBits) {
case UTRIE2_16_VALUE_BITS:
size+=dataLength*2;
break;
case UTRIE2_32_VALUE_BITS:
size+=dataLength*4;
break;
default:
*pErrorCode=U_INVALID_FORMAT_ERROR;
return 0;
}
if(length>=0) {
UTrie2Header *outTrie;
if(length<size) {
*pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
return 0;
}
outTrie=(UTrie2Header *)outData;
/* swap the header */
ds->swapArray32(ds, &inTrie->signature, 4, &outTrie->signature, pErrorCode);
ds->swapArray16(ds, &inTrie->options, 12, &outTrie->options, pErrorCode);
/* swap the index and the data */
switch(valueBits) {
case UTRIE2_16_VALUE_BITS:
ds->swapArray16(ds, inTrie+1, (trie.indexLength+dataLength)*2, outTrie+1, pErrorCode);
break;
case UTRIE2_32_VALUE_BITS:
ds->swapArray16(ds, inTrie+1, trie.indexLength*2, outTrie+1, pErrorCode);
ds->swapArray32(ds, (const uint16_t *)(inTrie+1)+trie.indexLength, dataLength*4,
(uint16_t *)(outTrie+1)+trie.indexLength, pErrorCode);
break;
default:
*pErrorCode=U_INVALID_FORMAT_ERROR;
return 0;
}
}
return size;
}
U_CAPI int32_t U_EXPORT2
ucptrie_swap(const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode) {
const UCPTrieHeader *inTrie;
UCPTrieHeader trie;
int32_t dataLength, size;
UCPTrieValueWidth valueWidth;
if(U_FAILURE(*pErrorCode)) {
return 0;
}
if(ds==nullptr || inData==nullptr || (length>=0 && outData==nullptr)) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
/* setup and swapping */
if(length>=0 && length<(int32_t)sizeof(UCPTrieHeader)) {
*pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
return 0;
}
inTrie=(const UCPTrieHeader *)inData;
trie.signature=ds->readUInt32(inTrie->signature);
trie.options=ds->readUInt16(inTrie->options);
trie.indexLength=ds->readUInt16(inTrie->indexLength);
trie.dataLength = ds->readUInt16(inTrie->dataLength);
UCPTrieType type = (UCPTrieType)((trie.options >> 6) & 3);
valueWidth = (UCPTrieValueWidth)(trie.options & UCPTRIE_OPTIONS_VALUE_BITS_MASK);
dataLength = ((int32_t)(trie.options & UCPTRIE_OPTIONS_DATA_LENGTH_MASK) << 4) | trie.dataLength;
int32_t minIndexLength = type == UCPTRIE_TYPE_FAST ?
UCPTRIE_BMP_INDEX_LENGTH : UCPTRIE_SMALL_INDEX_LENGTH;
if( trie.signature!=UCPTRIE_SIG ||
type > UCPTRIE_TYPE_SMALL ||
(trie.options & UCPTRIE_OPTIONS_RESERVED_MASK) != 0 ||
valueWidth > UCPTRIE_VALUE_BITS_8 ||
trie.indexLength < minIndexLength ||
dataLength < ASCII_LIMIT
) {
*pErrorCode=U_INVALID_FORMAT_ERROR; /* not a UCPTrie */
return 0;
}
size=sizeof(UCPTrieHeader)+trie.indexLength*2;
switch(valueWidth) {
case UCPTRIE_VALUE_BITS_16:
size+=dataLength*2;
break;
case UCPTRIE_VALUE_BITS_32:
size+=dataLength*4;
break;
case UCPTRIE_VALUE_BITS_8:
size+=dataLength;
break;
default:
*pErrorCode=U_INVALID_FORMAT_ERROR;
return 0;
}
if(length>=0) {
UCPTrieHeader *outTrie;
if(length<size) {
*pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
return 0;
}
outTrie=(UCPTrieHeader *)outData;
/* swap the header */
ds->swapArray32(ds, &inTrie->signature, 4, &outTrie->signature, pErrorCode);
ds->swapArray16(ds, &inTrie->options, 12, &outTrie->options, pErrorCode);
/* swap the index */
const uint16_t *inIndex=reinterpret_cast<const uint16_t *>(inTrie+1);
uint16_t *outIndex=reinterpret_cast<uint16_t *>(outTrie+1);
ds->swapArray16(ds, inIndex, trie.indexLength*2, outIndex, pErrorCode);
/* swap the data */
const uint16_t *inData=inIndex+trie.indexLength;
uint16_t *outData=outIndex+trie.indexLength;
switch(valueWidth) {
case UCPTRIE_VALUE_BITS_16:
ds->swapArray16(ds, inData, dataLength*2, outData, pErrorCode);
break;
case UCPTRIE_VALUE_BITS_32:
ds->swapArray32(ds, inData, dataLength*4, outData, pErrorCode);
break;
case UCPTRIE_VALUE_BITS_8:
if(inTrie!=outTrie) {
uprv_memmove(outData, inData, dataLength);
}
break;
default:
*pErrorCode=U_INVALID_FORMAT_ERROR;
return 0;
}
}
return size;
}
namespace {
/**
* Gets the trie version from 32-bit-aligned memory containing the serialized form
* of a UTrie (version 1), a UTrie2 (version 2), or a UCPTrie (version 3).
*
* @param data a pointer to 32-bit-aligned memory containing the serialized form of a trie
* @param length the number of bytes available at data;
* can be more than necessary (see return value)
* @param anyEndianOk If false, only platform-endian serialized forms are recognized.
* If true, opposite-endian serialized forms are recognized as well.
* @return the trie version of the serialized form, or 0 if it is not
* recognized as a serialized trie
*/
int32_t
getVersion(const void *data, int32_t length, UBool anyEndianOk) {
uint32_t signature;
if(length<16 || data==nullptr || (U_POINTER_MASK_LSB(data, 3)!=0)) {
return 0;
}
signature=*(const uint32_t *)data;
if(signature==UCPTRIE_SIG) {
return 3;
}
if(anyEndianOk && signature==UCPTRIE_OE_SIG) {
return 3;
}
if(signature==UTRIE2_SIG) {
return 2;
}
if(anyEndianOk && signature==UTRIE2_OE_SIG) {
return 2;
}
if(signature==UTRIE_SIG) {
return 1;
}
if(anyEndianOk && signature==UTRIE_OE_SIG) {
return 1;
}
return 0;
}
} // namespace
U_CAPI int32_t U_EXPORT2
utrie_swapAnyVersion(const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode) {
if(U_FAILURE(*pErrorCode)) { return 0; }
switch(getVersion(inData, length, true)) {
case 1:
return utrie_swap(ds, inData, length, outData, pErrorCode);
case 2:
return utrie2_swap(ds, inData, length, outData, pErrorCode);
case 3:
return ucptrie_swap(ds, inData, length, outData, pErrorCode);
default:
*pErrorCode=U_INVALID_FORMAT_ERROR;
return 0;
}
}
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