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-rw-r--r--deps/icu-small/source/common/udataswp.cpp473
1 files changed, 473 insertions, 0 deletions
diff --git a/deps/icu-small/source/common/udataswp.cpp b/deps/icu-small/source/common/udataswp.cpp
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+++ b/deps/icu-small/source/common/udataswp.cpp
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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);
+}
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