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/************************************************************************/
/* */
/* Simple io streams, recursive use for hexadecimal data. */
/* */
/************************************************************************/
# include "appUtilConfig.h"
# include "sioHex.h"
# include <appDebugon.h>
/************************************************************************/
/* */
/* For Hexadecimal decoding. */
/* */
/************************************************************************/
static const unsigned char SioHexDigitsU[]= "0123456789ABCDEF";
static const unsigned char SioHexDigitsL[]= "0123456789abcdef";
static unsigned char SioHexIndices[256];
/************************************************************************/
/* */
/* Exchange of hexed binary data. */
/* */
/************************************************************************/
static int sioHexClose( void * voids )
{ return 0; }
static int sioInHexReadBytes( void * voidsis,
unsigned char * buffer,
int count )
{
SimpleInputStream * sis= (SimpleInputStream *)voidsis;
int done= 0;
while( done < count )
{
int c;
c= sioInGetCharacter( sis );
while( c == ' ' || c == '\r' || c == '\n' )
{ c= sioInGetCharacter( sis ); }
if ( c == EOF )
{ return done; }
else{
if ( SioHexIndices[c] == 0xff )
{ sioInUngetLastRead( sis ); return done; }
else{ buffer[0]= SioHexIndices[c]; }
}
c= sioInGetCharacter( sis );
buffer[0] *= 16;
while( c == ' ' || c == '\r' || c == '\n' )
{ c= sioInGetCharacter( sis ); }
if ( c == EOF )
{ LDEB(c); return -1; }
if ( SioHexIndices[c] == 0xff )
{ CDEB(c); return -1; }
else{ buffer[0] += SioHexIndices[c]; }
buffer++; done++;
}
return done;
}
SimpleInputStream * sioInHexOpen( SimpleInputStream * sisHex )
{
SimpleInputStream * sis;
if ( SioHexIndices[0] == 0 )
{
int i;
for ( i= 0; i < sizeof(SioHexIndices); i++ )
{ SioHexIndices[i]= 0xff; }
i= 0;
while( SioHexDigitsU[i] )
{ SioHexIndices[SioHexDigitsU[i]]= i; i++; }
i= 0;
while( SioHexDigitsL[i] )
{ SioHexIndices[SioHexDigitsL[i]]= i; i++; }
}
sis= sioInOpen( (void *)sisHex,
sioInHexReadBytes, (SIOinSEEK)0, sioHexClose );
if ( ! sis )
{ XDEB(sis); return (SimpleInputStream *)0; }
return sis;
}
static int sioOutHexWriteBytes( void * voidsos,
const unsigned char * buffer,
int count )
{
SimpleOutputStream * sos= (SimpleOutputStream *)voidsos;
int done= 0;
while( done < count )
{
sioOutPutCharacter( SioHexDigitsL[ ( (*buffer) >> 4 ) & 0x0f ], sos );
sioOutPutCharacter( SioHexDigitsL[ ( (*buffer) >> 0 ) & 0x0f ], sos );
buffer++; done++;
}
return count;
}
static int sioHexSeek( void * voidsos,
long pos )
{
SimpleOutputStream * sos= (SimpleOutputStream *)voidsos;
if ( sioOutSeek( sos, 2* pos ) )
{ LDEB(0); return -1; }
return 0;
}
SimpleOutputStream * sioOutHexOpen( SimpleOutputStream * sosHex )
{
SimpleOutputStream * sos;
sos= sioOutOpen( (void *)sosHex, sioOutHexWriteBytes,
sioHexSeek, sioHexClose );
if ( ! sos )
{ XDEB(sos); return (SimpleOutputStream *)0; }
return sos;
}
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