Index: icu46/source/common/udataswp.c |
=================================================================== |
--- icu46/source/common/udataswp.c (revision 0) |
+++ icu46/source/common/udataswp.c (revision 0) |
@@ -0,0 +1,415 @@ |
+/* |
+******************************************************************************* |
+* |
+* Copyright (C) 2003, International Business Machines |
+* Corporation and others. All Rights Reserved. |
+* |
+******************************************************************************* |
+* file name: udataswp.c |
+* encoding: US-ASCII |
+* 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 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<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=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; |
+ |
+ swapper->swapArray16= inIsBigEndian==outIsBigEndian ? uprv_copyArray16 : uprv_swapArray16; |
+ swapper->swapArray32= inIsBigEndian==outIsBigEndian ? uprv_copyArray32 : uprv_swapArray32; |
+ |
+ 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<sizeof(DataHeader)) || |
+ outCharset>U_EBCDIC_FAMILY |
+ ) { |
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
+ return NULL; |
+ } |
+ |
+ pHeader=(const DataHeader *)data; |
+ if( (length>=0 && length<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); |
+} |
Property changes on: icu46/source/common/udataswp.c |
___________________________________________________________________ |
Added: svn:eol-style |
+ LF |