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HyperLib 1997 Winter - Disc 1
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HYPERLIB-1997-Winter-CD1.ISO.7z
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HYPERLIB-1997-Winter-CD1.ISO
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bwbasic-2.10.sit
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bwbasic-2.10
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bwx_iqc.c
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C/C++ Source or Header
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1996-10-09
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707 lines
/***************************************************************
bwx_iqc.c Environment-dependent implementation
of Bywater BASIC Interpreter
for IBM PC and Compatibles
using the Microsoft QuickC (tm) Compiler
Copyright (c) 1993, Ted A. Campbell
Bywater Software
email: tcamp@delphi.com
Copyright and Permissions Information:
All U.S. and international rights are claimed by the author,
Ted A. Campbell.
This software is released under the terms of the GNU General
Public License (GPL), which is distributed with this software
in the file "COPYING". The GPL specifies the terms under
which users may copy and use the software in this distribution.
A separate license is available for commercial distribution,
for information on which you should contact the author.
***************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <setjmp.h>
//#include <bios.h>
//#include <graph.h>
#include <signal.h>
#include "bwbasic.h"
#include "bwb_mes.h"
extern int prn_col;
extern jmp_buf mark;
short oldfgd;
long oldbgd;
int reset_mode = FALSE;
static int iqc_setpos( void );
/***************************************************************
FUNCTION: main()
DESCRIPTION: As in any C program, main() is the basic
function from which the rest of the
program is called. Some environments,
however, provide their own main() functions
(Microsoft Windows (tm) is an example).
In these cases, the following code will
have to be included in the initialization
function that is called by the environment.
***************************************************************/
void
main( int argc, char **argv )
{
#if MS_CMDS
struct videoconfig vc;
short videomode;
/* Save original foreground, background, and text position. */
_getvideoconfig( &vc );
oldfgd = _gettextcolor();
oldbgd = _getbkcolor();
if ( vc.mode != _TEXTC80 )
{
if ( _setvideomode( _TEXTC80 ) == 0 )
{
_getvideoconfig( &vc );
prn_xprintf( stderr, "Failed to set color video mode¥n" );
}
else
{
reset_mode = FALSE;
}
}
else
{
reset_mode = FALSE;
}
#endif /* MS_CMDS */
bwb_init( argc, argv );
#if INTERACTIVE
setjmp( mark );
#endif
/* now set the number of colors available */
// * var_findnval( co, co->array_pos ) = (bnumber) vc.numcolors;
/* main program loop */
while( !feof( stdin ) ) /* condition !feof( stdin ) added in v1.11 */
{
bwb_mainloop();
}
}
/***************************************************************
FUNCTION: bwx_signon()
DESCRIPTION:
***************************************************************/
int
bwx_signon( void )
{
sprintf( bwb_ebuf, "¥r%s %s¥n", MES_SIGNON, VERSION );
prn_xprintf( stdout, bwb_ebuf );
sprintf( bwb_ebuf, "¥r%s¥n", MES_COPYRIGHT );
prn_xprintf( stdout, bwb_ebuf );
#if PERMANENT_DEBUG
sprintf( bwb_ebuf, "¥r%s¥n", "Debugging Mode" );
prn_xprintf( stdout, bwb_ebuf );
#else
sprintf( bwb_ebuf, "¥r%s¥n", MES_LANGUAGE );
prn_xprintf( stdout, bwb_ebuf );
#endif
return TRUE;
}
/***************************************************************
FUNCTION: bwx_message()
DESCRIPTION:
***************************************************************/
int
bwx_message( char *m )
{
#if DEBUG
_outtext( "<MES>" );
#endif
// _outtext( m );
printf("%s",m);
return TRUE;
}
/***************************************************************
FUNCTION: bwx_putc()
DESCRIPTION:
***************************************************************/
extern int
bwx_putc( char c )
{
static char tbuf[ 2 ];
tbuf[ 0 ] = c;
tbuf[ 1 ] = '¥0';
//_outtext( tbuf );
printf("%s",c);
return TRUE;
}
/***************************************************************
FUNCTION: bwx_error()
DESCRIPTION:
***************************************************************/
int
bwx_errmes( char *m )
{
static char tbuf[ MAXSTRINGSIZE + 1 ]; /* this memory should be
permanent in case of memory
overrun errors */
if (( prn_col != 1 ) && ( errfdevice == stderr ))
{
prn_xprintf( errfdevice, "¥n" );
}
if ( CURTASK number == 0 )
{
sprintf( tbuf, "¥n%s: %s¥n", ERRD_HEADER, m );
}
else
{
sprintf( tbuf, "¥n%s %d: %s¥n", ERROR_HEADER, CURTASK number, m );
}
#if INTENSIVE_DEBUG
prn_xprintf( stderr, "<ERR>" );
#endif
prn_xprintf( errfdevice, tbuf );
return TRUE;
}
/***************************************************************
FUNCTION: bwx_input()
DESCRIPTION: As implemented here, the input facility
is a hybrid of _outtext output (which allows
the color to be set) and standard output
(which does not). The reason is that I've
found it helpful to use the DOS facility
for text entry, with its backspace-delete
and recognition of the SIGINT, depite the
fact that its output goes to stdout.
***************************************************************/
int
bwx_input( char *prompt, char *buffer )
{
#if INTENSIVE_DEBUG
prn_xprintf( stdout, "<INP>" );
#endif
prn_xprintf( stdout, prompt );
fgets( buffer, MAXREADLINESIZE, stdin );
prn_xprintf( stdout, "¥n" ); /* let _outtext catch up */
* prn_getcol( stdout ) = 1; /* reset column */
return TRUE;
}
/***************************************************************
FUNCTION: bwx_terminate()
DESCRIPTION:
***************************************************************/
void
bwx_terminate( void )
{
#if MS_CMDS
if ( reset_mode == TRUE )
{
_setvideomode( _DEFAULTMODE );
/* Restore original foreground and background. */
_settextcolor( oldfgd );
_setbkcolor( oldbgd );
}
#endif
exit( 0 );
}
/***************************************************************
FUNCTION: bwx_shell()
DESCRIPTION:
***************************************************************/
#if COMMAND_SHELL
extern int
bwx_shell( struct bwb_line *l )
{
static char *s_buffer;
static int init = FALSE;
static int position;
/* get memory for temporary buffer if necessary */
if ( init == FALSE )
{
init = TRUE;
if ( ( s_buffer = calloc( MAXSTRINGSIZE + 1, sizeof( char ) )) == NULL )
{
bwb_error( err_getmem );
return FALSE;
}
}
/* get the first element and check for a line number */
#if INTENSIVE_DEBUG
sprintf( bwb_ebuf, "in bwx_shell(): line buffer is <%s>.", l->buffer );
bwb_debug( bwb_ebuf );
#endif
position = 0;
adv_element( l->buffer, &position, s_buffer );
if ( is_numconst( s_buffer ) != TRUE ) /* not a line number */
{
#if INTENSIVE_DEBUG
sprintf( bwb_ebuf, "in bwx_shell(): no line number, command <%s>.",
l->buffer );
bwb_debug( bwb_ebuf );
#endif
if ( system( l->buffer ) == 0 )
{
iqc_setpos();
return TRUE;
}
else
{
iqc_setpos();
return FALSE;
}
}
else /* advance past line number */
{
adv_ws( l->buffer, &position ); /* advance past whitespace */
#if INTENSIVE_DEBUG
sprintf( bwb_ebuf, "in bwx_shell(): line number, command <%s>.",
l->buffer );
bwb_debug( bwb_ebuf );
#endif
if ( system( &( l->buffer[ position ] ) ) == 0 )
{
iqc_setpos();
return TRUE;
}
else
{
iqc_setpos();
return FALSE;
}
}
}
#endif
/***************************************************************
FUNCTION: iqc_setpos()
DESCRIPTION:
***************************************************************/
static int
iqc_setpos( void )
{
// union REGS ibm_registers;
/* call the BDOS function 0x10 to read the current cursor position */
// ibm_registers.h.ah = 3;
// ibm_registers.h.bh = (unsigned char) _getvisualpage();
// int86( 0x10, &ibm_registers, &ibm_registers );
/* set text to this position */
// _settextposition( ibm_registers.h.dh, ibm_registers.h.dl );
/* and move down one position */
prn_xprintf( stdout, "¥n" );
return TRUE;
}
#if COMMON_CMDS
/***************************************************************
FUNCTION: bwb_edit()
DESCRIPTION:
***************************************************************/
struct bwb_line *
bwb_edit( struct bwb_line *l )
{
char tbuf[ MAXSTRINGSIZE + 1 ];
char edname[ MAXSTRINGSIZE + 1 ];
struct bwb_variable *ed;
FILE *loadfile;
ed = var_find( DEFVNAME_EDITOR );
str_btoc( edname, var_getsval( ed ));
sprintf( tbuf, "%s %s", edname, CURTASK progfile );
#if INTENSIVE_DEBUG
sprintf( bwb_ebuf, "in bwb_edit(): command line <%s>", tbuf );
bwb_debug( bwb_ebuf );
#else
system( tbuf );
#endif
/* clear current contents */
bwb_new( l );
/* open edited file for read */
if ( ( loadfile = fopen( CURTASK progfile, "r" )) == NULL )
{
sprintf( bwb_ebuf, err_openfile, CURTASK progfile );
bwb_error( bwb_ebuf );
iqc_setpos();
return bwb_zline( l );
}
/* and (re)load the file into memory */
bwb_fload( loadfile );
iqc_setpos();
return bwb_zline( l );
}
/***************************************************************
FUNCTION: bwb_files()
DESCRIPTION:
***************************************************************/
struct bwb_line *
bwb_files( struct bwb_line *l )
{
char tbuf[ MAXVARNAMESIZE + 1 ];
char finame[ MAXVARNAMESIZE + 1 ];
char argument[ MAXVARNAMESIZE + 1 ];
struct bwb_variable *fi;
struct exp_ese *e;
fi = var_find( DEFVNAME_FILES );
str_btoc( finame, var_getsval( fi ));
/* get argument */
adv_ws( l->buffer, &( l->position ));
switch( l->buffer[ l->position ] )
{
case '¥0':
case '¥r':
case '¥n':
argument[ 0 ] = '¥0';
break;
default:
e = bwb_exp( l->buffer, FALSE, &( l->position ) );
if ( e->type != STRING )
{
bwb_error( err_mismatch );
return bwb_zline( l );
}
str_btoc( argument, exp_getsval( e ) );
break;
}
sprintf( tbuf, "%s %s", finame, argument );
#if INTENSIVE_DEBUG
sprintf( bwb_ebuf, "in bwb_files(): command line <%s>", tbuf );
bwb_debug( bwb_ebuf );
#else
system( tbuf );
#endif
iqc_setpos();
return bwb_zline( l );
}
#endif /* COMMON_CMDS */
#if INTERACTIVE
/***************************************************************
FUNCTION: fnc_inkey()
DESCRIPTION: This C function implements the BASIC INKEY$
function. It is implementation-specific.
***************************************************************/
extern struct bwb_variable *
fnc_inkey( int argc, struct bwb_variable *argv ,int x)
{
static struct bwb_variable nvar;
char tbuf[ MAXSTRINGSIZE + 1 ];
static int init = FALSE;
/* initialize the variable if necessary */
if ( init == FALSE )
{
init = TRUE;
var_make( &nvar, STRING );
}
/* check arguments */
#if PROG_ERRORS
if ( argc > 0 )
{
sprintf( bwb_ebuf, "Two many arguments to function INKEY$()" );
bwb_error( bwb_ebuf );
return &nvar;
}
#else
if ( fnc_checkargs( argc, argv, 0, 0 ) == FALSE )
{
return NULL;
}
#endif
/* body of the INKEY$ function */
/*
if ( _bios_keybrd( _KEYBRD_READY ) == 0 )
{
tbuf[ 0 ] = '¥0';
}
else
{
tbuf[ 0 ] = (char) _bios_keybrd( _KEYBRD_READ );
tbuf[ 1 ] = '¥0';
}
*/
gets(tbuf);
/* assign value to nvar variable */
str_ctob( var_findsval( &nvar, nvar.array_pos ), tbuf );
/* return value contained in nvar */
return &nvar;
}
#endif /* INTERACTIVE */
#if MS_CMDS
/***************************************************************
FUNCTION: bwb_cls()
DESCRIPTION: This C function implements the BASIC CLS
command. It is implementation-specific.
***************************************************************/
extern struct bwb_line *
bwb_cls( struct bwb_line *l )
{
_clearscreen( _GCLEARSCREEN );
return bwb_zline( l );
}
/***************************************************************
FUNCTION: bwb_locate()
DESCRIPTION: This C function implements the BASIC LOCATE
command. It is implementation-specific.
***************************************************************/
extern struct bwb_line *
bwb_locate( struct bwb_line *l )
{
struct exp_ese *e;
int row, column;
/* get first argument */
e = bwb_exp( l->buffer, FALSE, &( l->position ));
row = (int) exp_getnval( e );
/* advance past comma */
adv_ws( l->buffer, &( l->position ));
if ( l->buffer[ l->position ] != ',' )
{
bwb_error( err_syntax );
return bwb_zline( l );
}
++( l->position );
/* get second argument */
e = bwb_exp( l->buffer, FALSE, &( l->position ));
column = (int) exp_getnval( e );
/* position the cursor */
_settextposition( row, column );
return bwb_zline( l );
}
/***************************************************************
FUNCTION: bwb_color()
DESCRIPTION: This C function implements the BASIC COLOR
command. It is implementation-specific.
***************************************************************/
extern struct bwb_line *
bwb_color( struct bwb_line *l )
{
struct exp_ese *e;
int color;
/* get first argument */
e = bwb_exp( l->buffer, FALSE, &( l->position ));
color = (int) exp_getnval( e );
#if INTENSIVE_DEBUG
sprintf( bwb_ebuf, "Setting text color to %d", color );
bwb_debug( bwb_ebuf );
#endif
_settextcolor( (short) color );
#if INTENSIVE_DEBUG
sprintf( bwb_ebuf, "Set text color to %d", color );
bwb_debug( bwb_ebuf );
#endif
/* advance past comma */
adv_ws( l->buffer, &( l->position ));
if ( l->buffer[ l->position ] == ',' )
{
++( l->position );
/* get second argument */
e = bwb_exp( l->buffer, FALSE, &( l->position ));
color = (int) exp_getnval( e );
#if INTENSIVE_DEBUG
sprintf( bwb_ebuf, "Setting background color to %d", color );
bwb_debug( bwb_ebuf );
#endif
/* set the background color */
_setbkcolor( (long) color );
#if INTENSIVE_DEBUG
sprintf( bwb_ebuf, "Setting background color to %d¥n", color );
bwb_debug( bwb_ebuf );
#endif
}
return bwb_zline( l );
}
#endif /* MS_CMDS */