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/************************************************************************/
/* */
/* Simple io streams, recursive use reads PostScript 'pfb' encoded */
/* fonts as if they were 'pfa' encoded. */
/* */
/************************************************************************/
# include <stdlib.h>
# include "appUtilConfig.h"
# include "sioPfb.h"
# include <sioEndian.h>
# include <appDebugon.h>
/************************************************************************/
/* */
/* Exchange of hexed binary little endian data. */
/* */
/************************************************************************/
typedef struct BinaryFontStream
{
SimpleInputStream * bfsSis;
int bfsKindOfBlock;
unsigned long bfsBytesLeftInBlock;
int bfsHexColumn;
unsigned char bfsAhead;
unsigned char bfsHasAhead;
} BinaryFontStream;
# define MARKER 128
# define UNKNOWN 0
# define ASCII 1
# define BINARY 2
# define DONE 3
static int sioPfbClose( void * voidbfs )
{
free( voidbfs );
return 0;
}
/*
static char SIO_PFB_HEXDIGITS[]= "0123456789abcdef";
*/
static char SIO_PFB_HEXDIGITS[]= "0123456789ABCDEF";
static int sioInPfbReadBytes( void * voidbfs,
unsigned char * buffer,
int count )
{
BinaryFontStream * bfs= (BinaryFontStream *)voidbfs;
SimpleInputStream * sisPfb= bfs->bfsSis;
int done= 0;
int todo;
int c;
if ( bfs->bfsKindOfBlock == DONE )
{ return 0; }
if ( bfs->bfsHasAhead )
{
*(buffer++)= bfs->bfsAhead; done++;
bfs->bfsHasAhead= 0;
}
while( done < count )
{
if ( bfs->bfsBytesLeftInBlock == 0 )
{
c= sioInGetCharacter( sisPfb );
if ( c != MARKER )
{ LDEB(c); return -1; }
bfs->bfsKindOfBlock= sioInGetCharacter( sisPfb );
switch( bfs->bfsKindOfBlock )
{
case ASCII:
if ( bfs->bfsHexColumn > 0 )
{ *(buffer++)= '\n'; done++; }
bfs->bfsHexColumn= 0;
bfs->bfsBytesLeftInBlock= sioEndianGetLeUint32( sisPfb );
break;
case BINARY:
bfs->bfsHexColumn= 0;
bfs->bfsBytesLeftInBlock= sioEndianGetLeUint32( sisPfb );
break;
case DONE:
return done;
default:
LDEB(bfs->bfsKindOfBlock); return -1;
}
}
if ( bfs->bfsKindOfBlock == ASCII )
{
int i;
if ( bfs->bfsBytesLeftInBlock < count- done )
{ todo= bfs->bfsBytesLeftInBlock; }
else{ todo= count- done; }
todo= sioInReadBytes( sisPfb, buffer, todo );
if ( todo < 1 )
{ LDEB(todo); return todo; }
for ( i= 0; i < todo; buffer++, i++ )
{
if ( *buffer == '\r' )
{ *buffer= '\n'; }
}
done += todo;
bfs->bfsBytesLeftInBlock -= todo;
continue;
}
if ( bfs->bfsKindOfBlock == BINARY )
{
while( bfs->bfsBytesLeftInBlock > 0 &&
done < count )
{
if ( bfs->bfsHexColumn >= 64 )
{ done++; *(buffer++)= '\n'; bfs->bfsHexColumn= 0; }
if ( done+ 1 >= count )
{ break; }
c= sioInGetCharacter( sisPfb );
if ( c == EOF )
{ return done; }
bfs->bfsBytesLeftInBlock--;
*(buffer++)= SIO_PFB_HEXDIGITS[c/16];
*(buffer++)= SIO_PFB_HEXDIGITS[c%16];
done += 2; bfs->bfsHexColumn += 2;
}
if ( bfs->bfsBytesLeftInBlock > 0 &&
done < count )
{
c= sioInGetCharacter( sisPfb );
if ( c == EOF )
{ return done; }
bfs->bfsBytesLeftInBlock--;
*(buffer++)= SIO_PFB_HEXDIGITS[c/16];
bfs->bfsAhead= SIO_PFB_HEXDIGITS[c%16];
bfs->bfsHasAhead= 1;
done += 1; bfs->bfsHexColumn += 2; /* += 2! */
}
continue;
}
LDEB(bfs->bfsKindOfBlock); return -1;
}
return done;
}
SimpleInputStream * sioInPfbOpen( SimpleInputStream * sisPfb )
{
BinaryFontStream * bfs;
SimpleInputStream * sis;
bfs= malloc( sizeof(BinaryFontStream) );
if ( ! bfs )
{ XDEB(bfs); return (SimpleInputStream *)0; }
bfs->bfsSis= sisPfb;
bfs->bfsKindOfBlock= UNKNOWN;
bfs->bfsBytesLeftInBlock= 0;
bfs->bfsHexColumn= 0;
bfs->bfsHasAhead= 0;
sis= sioInOpen( (void *)bfs,
sioInPfbReadBytes, (SIOinSEEK)0, sioPfbClose );
if ( ! sis )
{ XDEB(sis); free( bfs ); return (SimpleInputStream *)0; }
return sis;
}
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