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// Update JR 12-09-1997 :
// - three methods of HashCoding of strings : we may keep the value
// of the hashcode of the string itself. This value is used when
// resizing of a Map or copying an item from a Map to another Map.
// - three methods of HashCoding of strings converted to uppercase.
#define _Standard_CString_SourceFile
#define OptJr 1
#ifdef HAVE_CONFIG_H
# include <oce-config.h>
#endif
#include <Standard_CString.hxx>
#include <Standard_Type.hxx>
#include <Standard_OStream.hxx>
#if OptJr
# if defined(WORDS_BIGENDIAN)
static const Standard_Integer static_MaskEndIntegerString[4] = { 0x00000000 ,
0xff000000 ,
0xffff0000 ,
0xffffff00 } ;
# else
static const Standard_Integer static_MaskEndIntegerString[4] = { 0x00000000 ,
0x000000ff ,
0x0000ffff ,
0x00ffffff } ;
# endif
#endif
#include <Standard_String.hxx>
#include <string.h>
//============================================================================
//====
//============================================================================
Handle_Standard_Type& Standard_CString_Type_()
{
static Handle_Standard_Type _aType =
new Standard_Type("Standard_CString",sizeof(Standard_CString),0,NULL);
return _aType;
}
//============================================================================
//==== ShallowDump : Writes a CString value.
//============================================================================
Standard_EXPORT void ShallowDump (const Standard_CString Value, Standard_OStream& s)
{ s << Value << " Standard_CString " << "\n"; }
//============================================================================
//==== HashCode of a CString
//============================================================================
Standard_Integer HashCode (const Standard_CString Value,
const Standard_Integer Upper )
{
Standard_Integer aLen ;
//#if OptJr
//STRINGLEN( Value , aLen ) ;
//#else
aLen = (Standard_Integer)strlen(Value);
//#endif
return HashCode ( HashCodes( Value , aLen ) , Upper ) ;
}
#if OptJr
# if defined(WORDS_BIGENDIAN)
static Standard_Integer Standard_Mask_String_Left[4] =
{ 0 , 0x00ffffff , 0x0000ffff , 0x000000ff } ;
static Standard_Integer Standard_Mask_String_Right[4] =
{ 0 , 0xff000000 , 0xffff0000 , 0xffffff00 } ;
# else
static Standard_Integer Standard_Mask_String_Left[4] =
{ 0 , 0xffffff00 , 0xffff0000 , 0xff000000 } ;
static Standard_Integer Standard_Mask_String_Right[4] =
{ 0 , 0x000000ff , 0x0000ffff , 0x00ffffff } ;
# endif
#endif
//============================================================================
//==== HashCode of a CString
//============================================================================
Standard_Integer HashCodes (const Standard_CString Value ,
const Standard_Integer Len )
{
Standard_Integer aHashCode = 0 ;
Standard_Integer i ;
#if !OptJr
char *charPtr = (char *)Value;
Standard_Integer pos = 0,
count,
*tmphash;
char tabchar[20];
#endif
if (Value != NULL) {
#if !OptJr
i = 0 ;
while (i < Len) {
for (count = 0,pos = i;count < sizeof(Standard_Integer); count++) {
if (pos + count >= Len) tabchar[count] = '\0';
else tabchar[count] = charPtr[pos + count];
i++;
}
tmphash = (Standard_Integer *)tabchar;
aHashCode = aHashCode ^ *tmphash;
}
}
#else
Standard_Integer *value = (Standard_Integer *)(ptrdiff_t(Value) & ~0x3) ;
Standard_Integer len = Len ;
unsigned int aResidue = (unsigned int)(ptrdiff_t(Value) & 0x3);
if (aResidue) {
aHashCode = *value & Standard_Mask_String_Left[aResidue] ;
value += 1 ;
len -= (4 - aResidue);
}
for ( i = 1 ; i <= len >> 2 ; i++ ) {
aHashCode = aHashCode ^ value[ i - 1 ] ;
}
aHashCode = aHashCode ^ ( value[ i - 1 ] &
Standard_Mask_String_Right[ len & 3 ] ) ;
if ( len != Len ) {
# if defined(WORDS_BIGENDIAN)
aHashCode = aHashCode << 8*aResidue |
aHashCode >> 8*(4 - aResidue) ;
# else
aHashCode = aHashCode << 8*(4 - aResidue) |
aHashCode >> 8*aResidue ;
# endif
}
}
#endif
return aHashCode ;
}
# if defined(WORDS_BIGENDIAN)
static Standard_Integer Standard_Mask_Upper_Lower[5] =
{ 0 , 0xdf000000 , 0xdfdf0000 , 0xdfdfdf00 , 0xdfdfdfdf } ;
#else
static Standard_Integer Standard_Mask_Upper_Lower[5] =
{ 0 , 0xdf , 0xdfdf , 0xdfdfdf , 0xdfdfdfdf } ;
#endif
//============================================================================
//==== HashCode of a CString with discard of bit 5 (UpperCase<-->LowerCase)
// Efficient for Types and MethodNames (without copy of characters)
// Valid if we have only alphanumeric characters and "_" (unicity)
// Valid if the Strings address is aligned for Integers
//============================================================================
Standard_Integer HASHCODES (const Standard_CString Value ,
const Standard_Integer Len )
{
Standard_Integer aHashCode = 0 ;
Standard_Integer i = 0 ;
if (Value != NULL) {
#ifdef ALIGNMENT_BUG
for ( i = 1 ; i <= Len >> 2 ; i++ ) {
aHashCode = aHashCode ^
( ((Standard_Integer *) Value ) [ i - 1 ] &
Standard_Mask_Upper_Lower[4] ) ;
}
aHashCode = aHashCode ^
( ((Standard_Integer *) Value ) [ i - 1 ] &
Standard_Mask_Upper_Lower[ Len & 3 ] ) ;
#else
Standard_Integer itmp = 0 ;
for ( i = 0 ; i <= Len-4 ; i+=4 ) {
memcpy(&itmp,(const void *)&Value[i],4);
aHashCode=aHashCode^(itmp&Standard_Mask_Upper_Lower[4]);
}
if (Len&3) {
memcpy(&itmp,(const void *)&Value[i],Len&3);
aHashCode=aHashCode^(itmp&Standard_Mask_Upper_Lower[Len&3]);
}
#endif
}
return aHashCode ;
}
//============================================================================
// IsEqual : Returns Standard_True if two CString have the same value
// Comparison is done with discard of bit 5 (UpperCase<-->LowerCase)
// Efficient for Types and MethodNames (without copy of characters)
// Valid if we have only alphanumeric characters and "_" (unicity)
// Valid if the Strings address are aligned for Integers
//============================================================================
Standard_Boolean ISSIMILAR(const Standard_CString One ,
const Standard_Integer LenOne ,
const Standard_CString Two )
{
Standard_Integer i ;
#ifdef ALIGNMENT_BUG
for ( i = 1 ; i <= LenOne >> 2 ; i++ ) {
if ( (((Standard_Integer *) One ) [ i - 1 ] &
Standard_Mask_Upper_Lower[ 4 ] ) !=
(((Standard_Integer *) Two ) [ i - 1 ] &
Standard_Mask_Upper_Lower[ 4 ] ) )
return Standard_False ;
}
if ( (((Standard_Integer *) One ) [ i - 1 ] &
Standard_Mask_Upper_Lower[ LenOne & 3 ] ) !=
(((Standard_Integer *) Two ) [ i - 1 ] &
Standard_Mask_Upper_Lower[ LenOne & 3 ] ) )
return Standard_False ;
#else
Standard_Integer iOne, iTwo ;
for ( i = 0; i <= LenOne-4; i+=4 ) {
memcpy(&iOne,(const void *)&One[i],4);
memcpy(&iTwo,(const void *)&Two[i],4);
if ((iOne&Standard_Mask_Upper_Lower[4] ) !=
(iTwo&Standard_Mask_Upper_Lower[4]))
return Standard_False;
}
if(LenOne&3) {
memcpy(&iOne,(const void *)&One[i],4);
memcpy(&iTwo,(const void *)&Two[i],4);
if ( (iOne&Standard_Mask_Upper_Lower[LenOne&3]) !=
(iTwo&Standard_Mask_Upper_Lower[LenOne&3]))
return Standard_False;
}
#endif
return Standard_True ;
}
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