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/* @(#) pf_words.c 96/12/18 1.10 */
/***************************************************************
** Forth words for PForth based on 'C'
**
** Author: Phil Burk
** Copyright 1994 3DO, Phil Burk, Larry Polansky, Devid Rosenboom
**
** The pForth software code is dedicated to the public domain,
** and any third party may reproduce, distribute and modify
** the pForth software code or any derivative works thereof
** without any compensation or license. The pForth software
** code is provided on an "as is" basis without any warranty
** of any kind, including, without limitation, the implied
** warranties of merchantability and fitness for a particular
** purpose and their equivalents under the laws of any jurisdiction.
**
**
** 941031 rdg fix ffScan() to look for CRs and LFs
**
***************************************************************/
#include "pf_all.h"
/***************************************************************
** Print number in current base to output stream.
** This version does not handle double precision.
*/
void ffDot( int32 n )
{
MSG( ConvertNumberToText( n, gVarBase, TRUE, 1 ) );
EMIT(' ');
}
/***************************************************************
** Print number in current base to output stream.
** This version does not handle double precision.
*/
void ffDotHex( int32 n )
{
MSG( ConvertNumberToText( n, 16, FALSE, 1 ) );
EMIT(' ');
}
/* ( ... --- ... , print stack ) */
void ffDotS( void )
{
cell *sp;
int32 i, Depth;
MSG("Stack<");
MSG( ConvertNumberToText( gVarBase, 10, TRUE, 1 ) ); /* Print base in decimal. */
MSG("> ");
Depth = gCurrentTask->td_StackBase - gCurrentTask->td_StackPtr;
sp = gCurrentTask->td_StackBase;
if( Depth < 0 )
{
MSG("UNDERFLOW!");
}
else
{
for( i=0; i<Depth; i++ )
{
/* Print as unsigned if not base 10. */
MSG( ConvertNumberToText( *(--sp), gVarBase, (gVarBase == 10), 1 ) );
EMIT(' ');
}
}
MSG("\n");
}
/* ( addr cnt char -- addr' cnt' , skip leading characters ) */
cell ffSkip( char *AddrIn, cell Cnt, char c, char **AddrOut )
{
char *s;
s = AddrIn;
if( c == BLANK )
{
while( ( Cnt > 0 ) &&
(( *s == BLANK) || ( *s == '\t')) )
{
DBUGX(("ffSkip BLANK: %c, %d\n", *s, Cnt ));
s++;
Cnt--;
}
}
else
{
while(( Cnt > 0 ) && ( *s == c ))
{
DBUGX(("ffSkip: %c=0x%x, %d\n", *s, Cnt ));
s++;
Cnt--;
}
}
*AddrOut = s;
return Cnt;
}
/* ( addr cnt char -- addr' cnt' , scan for char ) */
cell ffScan( char *AddrIn, cell Cnt, char c, char **AddrOut )
{
char *s;
s = AddrIn;
if( c == BLANK )
{
while(( Cnt > 0 ) &&
( *s != BLANK) &&
( *s != '\r') &&
( *s != '\n') &&
( *s != '\t'))
{
DBUGX(("ffScan BLANK: %c, %d\n", *s, Cnt ));
s++;
Cnt--;
}
}
else
{
while(( Cnt > 0 ) && ( *s != c ))
{
DBUGX(("ffScan: %c, %d\n", *s, Cnt ));
s++;
Cnt--;
}
}
*AddrOut = s;
return Cnt;
}
/***************************************************************
** Forth equivalent 'C' functions.
***************************************************************/
/* Convert a single digit to the corresponding hex number. */
static cell HexDigitToNumber( char c )
{
if( (c >= '0') && (c <= '9') )
{
return( c - '0' );
}
else if ( (c >= 'A') && (c <= 'F') )
{
return( c - 'A' + 0x0A );
}
else
{
return -1;
}
}
/* Convert a string to the corresponding number using BASE. */
cell ffNumberQ( const char *FWord, cell *Num )
{
int32 Len, i, Accum=0, n, Sign=1;
const char *s;
/* get count */
Len = *FWord++;
s = FWord;
/* process initial minus sign */
if( *s == '-' )
{
Sign = -1;
s++;
Len--;
}
for( i=0; i<Len; i++)
{
n = HexDigitToNumber( *s++ );
if( (n < 0) || (n >= gVarBase) )
{
return NUM_TYPE_BAD;
}
Accum = (Accum * gVarBase) + n;
}
*Num = Accum * Sign;
return NUM_TYPE_SINGLE;
}
/***************************************************************
** Compiler Support
***************************************************************/
/* ( char -- c-addr , parse word ) */
char * ffWord( char c )
{
char *s1,*s2,*s3;
int32 n1, n2, n3;
int32 i, nc;
s1 = gCurrentTask->td_SourcePtr + gCurrentTask->td_IN;
n1 = gCurrentTask->td_SourceNum - gCurrentTask->td_IN;
n2 = ffSkip( s1, n1, c, &s2 );
DBUGX(("ffWord: s2=%c, %d\n", *s2, n2 ));
n3 = ffScan( s2, n2, c, &s3 );
DBUGX(("ffWord: s3=%c, %d\n", *s3, n3 ));
nc = n2-n3;
if (nc > 0)
{
gScratch[0] = (char) nc;
for( i=0; i<nc; i++ )
{
gScratch[i+1] = pfCharToUpper( s2[i] );
}
}
else
{
gScratch[0] = 0;
}
gCurrentTask->td_IN += (n1-n3) + 1;
return &gScratch[0];
}
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