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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*
* Copyright (C) 2003-2014, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: udataswp.c
* encoding: UTF-8
* tab size: 8 (not used)
* indentation:4
*
* created on: 2003jun05
* created by: Markus W. Scherer
*
* Definitions for ICU data transformations for different platforms,
* changing between big- and little-endian data and/or between
* charset families (ASCII<->EBCDIC).
*/
#include <stdarg.h>
#include "unicode/utypes.h"
#include "unicode/udata.h" /* UDataInfo */
#include "ucmndata.h" /* DataHeader */
#include "cmemory.h"
#include "udataswp.h"
/* swapping primitives ------------------------------------------------------ */
static int32_t U_CALLCONV
uprv_swapArray16(const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode) {
const uint16_t *p;
uint16_t *q;
int32_t count;
uint16_t x;
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
return 0;
}
if(ds==NULL || inData==NULL || length<0 || (length&1)!=0 || outData==NULL) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
/* setup and swapping */
p=(const uint16_t *)inData;
q=(uint16_t *)outData;
count=length/2;
while(count>0) {
x=*p++;
*q++=(uint16_t)((x<<8)|(x>>8));
--count;
}
return length;
}
static int32_t U_CALLCONV
uprv_copyArray16(const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode) {
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
return 0;
}
if(ds==NULL || inData==NULL || length<0 || (length&1)!=0 || outData==NULL) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
if(length>0 && inData!=outData) {
uprv_memcpy(outData, inData, length);
}
return length;
}
static int32_t U_CALLCONV
uprv_swapArray32(const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode) {
const uint32_t *p;
uint32_t *q;
int32_t count;
uint32_t x;
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
return 0;
}
if(ds==NULL || inData==NULL || length<0 || (length&3)!=0 || outData==NULL) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
/* setup and swapping */
p=(const uint32_t *)inData;
q=(uint32_t *)outData;
count=length/4;
while(count>0) {
x=*p++;
*q++=(uint32_t)((x<<24)|((x<<8)&0xff0000)|((x>>8)&0xff00)|(x>>24));
--count;
}
return length;
}
static int32_t U_CALLCONV
uprv_copyArray32(const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode) {
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
return 0;
}
if(ds==NULL || inData==NULL || length<0 || (length&3)!=0 || outData==NULL) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
if(length>0 && inData!=outData) {
uprv_memcpy(outData, inData, length);
}
return length;
}
static int32_t U_CALLCONV
uprv_swapArray64(const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode) {
const uint64_t *p;
uint64_t *q;
int32_t count;
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
return 0;
}
if(ds==NULL || inData==NULL || length<0 || (length&7)!=0 || outData==NULL) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
/* setup and swapping */
p=(const uint64_t *)inData;
q=(uint64_t *)outData;
count=length/8;
while(count>0) {
uint64_t x=*p++;
x=(x<<56)|((x&0xff00)<<40)|((x&0xff0000)<<24)|((x&0xff000000)<<8)|
((x>>8)&0xff000000)|((x>>24)&0xff0000)|((x>>40)&0xff00)|(x>>56);
*q++=x;
--count;
}
return length;
}
static int32_t U_CALLCONV
uprv_copyArray64(const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode) {
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
return 0;
}
if(ds==NULL || inData==NULL || length<0 || (length&7)!=0 || outData==NULL) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
if(length>0 && inData!=outData) {
uprv_memcpy(outData, inData, length);
}
return length;
}
static uint16_t U_CALLCONV
uprv_readSwapUInt16(uint16_t x) {
return (uint16_t)((x<<8)|(x>>8));
}
static uint16_t U_CALLCONV
uprv_readDirectUInt16(uint16_t x) {
return x;
}
static uint32_t U_CALLCONV
uprv_readSwapUInt32(uint32_t x) {
return (uint32_t)((x<<24)|((x<<8)&0xff0000)|((x>>8)&0xff00)|(x>>24));
}
static uint32_t U_CALLCONV
uprv_readDirectUInt32(uint32_t x) {
return x;
}
static void U_CALLCONV
uprv_writeSwapUInt16(uint16_t *p, uint16_t x) {
*p=(uint16_t)((x<<8)|(x>>8));
}
static void U_CALLCONV
uprv_writeDirectUInt16(uint16_t *p, uint16_t x) {
*p=x;
}
static void U_CALLCONV
uprv_writeSwapUInt32(uint32_t *p, uint32_t x) {
*p=(uint32_t)((x<<24)|((x<<8)&0xff0000)|((x>>8)&0xff00)|(x>>24));
}
static void U_CALLCONV
uprv_writeDirectUInt32(uint32_t *p, uint32_t x) {
*p=x;
}
U_CAPI int16_t U_EXPORT2
udata_readInt16(const UDataSwapper *ds, int16_t x) {
return (int16_t)ds->readUInt16((uint16_t)x);
}
U_CAPI int32_t U_EXPORT2
udata_readInt32(const UDataSwapper *ds, int32_t x) {
return (int32_t)ds->readUInt32((uint32_t)x);
}
/**
* Swap a block of invariant, NUL-terminated strings, but not padding
* bytes after the last string.
* @internal
*/
U_CAPI int32_t U_EXPORT2
udata_swapInvStringBlock(const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode) {
const char *inChars;
int32_t stringsLength;
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
return 0;
}
if(ds==NULL || inData==NULL || length<0 || (length>0 && outData==NULL)) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
/* reduce the strings length to not include bytes after the last NUL */
inChars=(const char *)inData;
stringsLength=length;
while(stringsLength>0 && inChars[stringsLength-1]!=0) {
--stringsLength;
}
/* swap up to the last NUL */
ds->swapInvChars(ds, inData, stringsLength, outData, pErrorCode);
/* copy the bytes after the last NUL */
if(inData!=outData && length>stringsLength) {
uprv_memcpy((char *)outData+stringsLength, inChars+stringsLength, length-stringsLength);
}
/* return the length including padding bytes */
if(U_SUCCESS(*pErrorCode)) {
return length;
} else {
return 0;
}
}
U_CAPI void U_EXPORT2
udata_printError(const UDataSwapper *ds,
const char *fmt,
...) {
va_list args;
if(ds->printError!=NULL) {
va_start(args, fmt);
ds->printError(ds->printErrorContext, fmt, args);
va_end(args);
}
}
/* swap a data header ------------------------------------------------------- */
U_CAPI int32_t U_EXPORT2
udata_swapDataHeader(const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode) {
const DataHeader *pHeader;
uint16_t headerSize, infoSize;
/* argument checking */
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
return 0;
}
if(ds==NULL || inData==NULL || length<-1 || (length>0 && outData==NULL)) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
/* check minimum length and magic bytes */
pHeader=(const DataHeader *)inData;
if( (length>=0 && length<(int32_t)sizeof(DataHeader)) ||
pHeader->dataHeader.magic1!=0xda ||
pHeader->dataHeader.magic2!=0x27 ||
pHeader->info.sizeofUChar!=2
) {
udata_printError(ds, "udata_swapDataHeader(): initial bytes do not look like ICU data\n");
*pErrorCode=U_UNSUPPORTED_ERROR;
return 0;
}
headerSize=ds->readUInt16(pHeader->dataHeader.headerSize);
infoSize=ds->readUInt16(pHeader->info.size);
if( headerSize<sizeof(DataHeader) ||
infoSize<sizeof(UDataInfo) ||
headerSize<(sizeof(pHeader->dataHeader)+infoSize) ||
(length>=0 && length<headerSize)
) {
udata_printError(ds, "udata_swapDataHeader(): header size mismatch - headerSize %d infoSize %d length %d\n",
headerSize, infoSize, length);
*pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
return 0;
}
if(length>0) {
DataHeader *outHeader;
const char *s;
int32_t maxLength;
/* Most of the fields are just bytes and need no swapping. */
if(inData!=outData) {
uprv_memcpy(outData, inData, headerSize);
}
outHeader=(DataHeader *)outData;
outHeader->info.isBigEndian = ds->outIsBigEndian;
outHeader->info.charsetFamily = ds->outCharset;
/* swap headerSize */
ds->swapArray16(ds, &pHeader->dataHeader.headerSize, 2, &outHeader->dataHeader.headerSize, pErrorCode);
/* swap UDataInfo size and reservedWord */
ds->swapArray16(ds, &pHeader->info.size, 4, &outHeader->info.size, pErrorCode);
/* swap copyright statement after the UDataInfo */
infoSize+=sizeof(pHeader->dataHeader);
s=(const char *)inData+infoSize;
maxLength=headerSize-infoSize;
/* get the length of the string */
for(length=0; length<maxLength && s[length]!=0; ++length) {}
/* swap the string contents */
ds->swapInvChars(ds, s, length, (char *)outData+infoSize, pErrorCode);
}
return headerSize;
}
/* API functions ------------------------------------------------------------ */
U_CAPI UDataSwapper * U_EXPORT2
udata_openSwapper(UBool inIsBigEndian, uint8_t inCharset,
UBool outIsBigEndian, uint8_t outCharset,
UErrorCode *pErrorCode) {
UDataSwapper *swapper;
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
return NULL;
}
if(inCharset>U_EBCDIC_FAMILY || outCharset>U_EBCDIC_FAMILY) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return NULL;
}
/* allocate the swapper */
swapper=(UDataSwapper *)uprv_malloc(sizeof(UDataSwapper));
if(swapper==NULL) {
*pErrorCode=U_MEMORY_ALLOCATION_ERROR;
return NULL;
}
uprv_memset(swapper, 0, sizeof(UDataSwapper));
/* set values and functions pointers according to in/out parameters */
swapper->inIsBigEndian=inIsBigEndian;
swapper->inCharset=inCharset;
swapper->outIsBigEndian=outIsBigEndian;
swapper->outCharset=outCharset;
swapper->readUInt16= inIsBigEndian==U_IS_BIG_ENDIAN ? uprv_readDirectUInt16 : uprv_readSwapUInt16;
swapper->readUInt32= inIsBigEndian==U_IS_BIG_ENDIAN ? uprv_readDirectUInt32 : uprv_readSwapUInt32;
swapper->writeUInt16= outIsBigEndian==U_IS_BIG_ENDIAN ? uprv_writeDirectUInt16 : uprv_writeSwapUInt16;
swapper->writeUInt32= outIsBigEndian==U_IS_BIG_ENDIAN ? uprv_writeDirectUInt32 : uprv_writeSwapUInt32;
swapper->compareInvChars= outCharset==U_ASCII_FAMILY ? uprv_compareInvAscii : uprv_compareInvEbcdic;
if(inIsBigEndian==outIsBigEndian) {
swapper->swapArray16=uprv_copyArray16;
swapper->swapArray32=uprv_copyArray32;
swapper->swapArray64=uprv_copyArray64;
} else {
swapper->swapArray16=uprv_swapArray16;
swapper->swapArray32=uprv_swapArray32;
swapper->swapArray64=uprv_swapArray64;
}
if(inCharset==U_ASCII_FAMILY) {
swapper->swapInvChars= outCharset==U_ASCII_FAMILY ? uprv_copyAscii : uprv_ebcdicFromAscii;
} else /* U_EBCDIC_FAMILY */ {
swapper->swapInvChars= outCharset==U_EBCDIC_FAMILY ? uprv_copyEbcdic : uprv_asciiFromEbcdic;
}
return swapper;
}
U_CAPI UDataSwapper * U_EXPORT2
udata_openSwapperForInputData(const void *data, int32_t length,
UBool outIsBigEndian, uint8_t outCharset,
UErrorCode *pErrorCode) {
const DataHeader *pHeader;
uint16_t headerSize, infoSize;
UBool inIsBigEndian;
int8_t inCharset;
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
return NULL;
}
if( data==NULL ||
(length>=0 && length<(int32_t)sizeof(DataHeader)) ||
outCharset>U_EBCDIC_FAMILY
) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return NULL;
}
pHeader=(const DataHeader *)data;
if( (length>=0 && length<(int32_t)sizeof(DataHeader)) ||
pHeader->dataHeader.magic1!=0xda ||
pHeader->dataHeader.magic2!=0x27 ||
pHeader->info.sizeofUChar!=2
) {
*pErrorCode=U_UNSUPPORTED_ERROR;
return 0;
}
inIsBigEndian=(UBool)pHeader->info.isBigEndian;
inCharset=pHeader->info.charsetFamily;
if(inIsBigEndian==U_IS_BIG_ENDIAN) {
headerSize=pHeader->dataHeader.headerSize;
infoSize=pHeader->info.size;
} else {
headerSize=uprv_readSwapUInt16(pHeader->dataHeader.headerSize);
infoSize=uprv_readSwapUInt16(pHeader->info.size);
}
if( headerSize<sizeof(DataHeader) ||
infoSize<sizeof(UDataInfo) ||
headerSize<(sizeof(pHeader->dataHeader)+infoSize) ||
(length>=0 && length<headerSize)
) {
*pErrorCode=U_UNSUPPORTED_ERROR;
return 0;
}
return udata_openSwapper(inIsBigEndian, inCharset, outIsBigEndian, outCharset, pErrorCode);
}
U_CAPI void U_EXPORT2
udata_closeSwapper(UDataSwapper *ds) {
uprv_free(ds);
}