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bccio.c
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/* $Id: bccio.c,v 1.1.1.1 2000/05/10 14:20:51 jholder Exp $
* --------------------------------------------------------------------
* see doc/License.txt for License Information
* --------------------------------------------------------------------
*
* File name: $Id: bccio.c,v 1.1.1.1 2000/05/10 14:20:51 jholder Exp $
*
* Description:
*
* Modification history:
* $Log: bccio.c,v $
* Revision 1.1.1.1 2000/05/10 14:20:51 jholder
*
* imported
*
*
* --------------------------------------------------------------------
*/
/*
* bccio.c
*
* Borland C specific screen I/O routines for DOS.
*
*/
#include "ztypes.h"
#include <conio.h>
#include <time.h>
#include <sys/types.h>
#define BLACK 0
#define BLUE 1
#define GREEN 2
#define CYAN 3
#define RED 4
#define MAGENTA 5
#define BROWN 6
#define WHITE 7
#define BRIGHT 0x08
/* below was 0x10 */
#define FLASH 0x80
static unsigned char prevmode;
static int win_cursor_on = 1;
static int screen_started = FALSE;
static int cursor_saved = OFF;
static int saved_row = 0;
static int saved_col = 0;
static ZINT16 current_fg;
static ZINT16 current_bg;
static ZINT16 default_fg = WHITE;
static ZINT16 default_bg = BLUE;
int timed_read_key( int );
int read_key( void );
int BUFFER_SIZE;
char *commands;
static int space_avail;
static int ptr1, ptr2 = 0;
static int end_ptr = 0;
static int row, head_col;
static void get_prev_command( void );
static void get_next_command( void );
static void get_first_command( void );
static void delete_command( void );
static void add_command( char *, int size );
static int display_command( char * );
void initialize_screen( void )
{
struct text_info ti;
gettextinfo( &ti );
prevmode = ti.currmode;
if ( bigscreen )
{
textmode( C4350 );
}
else
{
textmode( C80 );
}
gettextinfo( &ti );
if ( screen_rows == 0 )
screen_rows = ti.screenheight;
if ( screen_cols == 0 )
screen_cols = ti.screenwidth;
window( 1, 1, screen_cols, screen_rows );
_wscroll = 0;
if ( monochrome )
default_bg = 0; /* black */
set_colours( 1, 1 ); /* set default colours */
set_attribute( NORMAL );
clear_screen( );
move_cursor( screen_rows / 2 - 1, ( screen_cols - sizeof ( JZIPVER ) ) / 2 );
cputs( JZIPVER );
move_cursor( screen_rows / 2, ( screen_cols - sizeof ( "The story is loading..." ) ) / 2 );
cputs( "The story is loading..." );
/* set up the history buffer to be the right size */
commands = ( char * ) malloc( hist_buf_size * sizeof ( char ) );
if ( commands == NULL )
{
/* try again, with smaller buffer if failure */
if ( hist_buf_size > 1024 )
{
commands = ( char * ) malloc( 1024 * sizeof ( char ) );
if ( commands == NULL )
{
fatal( "initialize_screen(): Could not allocate history buffer." );
}
else
{
hist_buf_size = 1024;
}
}
else
{
fatal( "initialize_screen(): Could not allocate history buffer." );
}
}
BUFFER_SIZE = hist_buf_size;
space_avail = hist_buf_size - 1;
screen_started = TRUE;
h_interpreter = INTERP_MSDOS;
JTERP = INTERP_MSDOS;
} /* initialize_screen */
void restart_screen( void )
{
zbyte_t high = 1, low = 0;
cursor_saved = OFF;
set_byte( H_STANDARD_HIGH, high );
set_byte( H_STANDARD_LOW, low );
if ( h_type < V4 )
{
set_byte( H_CONFIG, ( get_byte( H_CONFIG ) | CONFIG_WINDOWS ) );
}
else
{
/* turn stuff on */
set_byte( H_CONFIG,
( get_byte( H_CONFIG ) | CONFIG_BOLDFACE | CONFIG_EMPHASIS | CONFIG_FIXED |
CONFIG_TIMEDINPUT | CONFIG_COLOUR ) );
/* turn stuff off */
set_byte( H_CONFIG, ( get_byte( H_CONFIG ) & ~CONFIG_PICTURES & ~CONFIG_SFX ) );
}
/* Force graphics off as we can't do them */
set_word( H_FLAGS, ( get_word( H_FLAGS ) & ( ~GRAPHICS_FLAG ) ) );
} /* restart_screen */
void reset_screen( void )
{
if ( screen_started == TRUE )
{
output_new_line( );
output_string( "[Hit any key to exit.]" );
( void ) read_key( );
output_new_line( );
textmode( prevmode );
clear_screen( );
}
screen_started = FALSE;
} /* reset_screen */
void clear_screen( void )
{
clrscr( );
} /* clear_screen */
void create_status_window( void )
{
} /* create_status_window */
void delete_status_window( void )
{
} /* delete_status_window */
void select_status_window( void )
{
save_cursor_position( );
if ( !win_cursor_on )
{
_setcursortype( _NOCURSOR );
}
} /* select_status_window */
void select_text_window( void )
{
if ( !win_cursor_on )
{
_setcursortype( _NORMALCURSOR );
}
restore_cursor_position( );
} /* select_text_window */
void clear_line( void )
{
clreol( );
} /* clear_line */
void clear_text_window( void )
{
struct text_info ti;
int row, col;
get_cursor_position( &row, &col );
gettextinfo( &ti );
window( ti.winleft, status_size + 1, ti.winright, ti.winbottom );
clrscr( );
window( ti.winleft, ti.wintop, ti.winright, ti.winbottom );
move_cursor( row, col );
} /* clear_text_window */
void clear_status_window( void )
{
struct text_info ti;
int row, col;
get_cursor_position( &row, &col );
gettextinfo( &ti );
window( ti.winleft, 1, ti.winright, status_size );
clrscr( );
window( ti.winleft, ti.wintop, ti.winright, ti.winbottom );
move_cursor( row, col );
} /* clear_status_window */
void move_cursor( int row, int col )
{
gotoxy( col, row );
} /* move_cursor */
struct rccoord
{
int row;
int col;
};
struct rccoord _gettextposition( void )
{
struct rccoord rc_coord;
rc_coord.row = wherey( );
rc_coord.col = wherex( );
return rc_coord;
}
void get_cursor_position( int *row, int *col )
{
struct rccoord rc;
rc = _gettextposition( );
*row = rc.row;
*col = rc.col;
} /* get_cursor_position */
void save_cursor_position( void )
{
if ( cursor_saved == OFF )
{
get_cursor_position( &saved_row, &saved_col );
cursor_saved = ON;
}
} /* save_cursor_position */
void restore_cursor_position( void )
{
if ( cursor_saved == ON )
{
move_cursor( saved_row, saved_col );
cursor_saved = OFF;
}
} /* restore_cursor_position */
void set_attribute( int attribute )
{
int new_fg, new_bg;
if ( attribute == NORMAL )
{
new_fg = ( current_fg & 0x07 );
new_bg = current_bg;
}
if ( attribute & REVERSE )
{
new_fg = current_bg;
new_bg = ( current_fg & 0x07 );
}
if ( attribute & BOLD )
{
new_fg = current_fg | BRIGHT;
new_bg = current_bg;
}
if ( attribute & EMPHASIS )
{
new_fg = current_fg | BRIGHT;
new_bg = current_bg;
}
if ( attribute & FIXED_FONT )
{
new_fg = current_fg;
new_bg = current_bg;
}
textcolor( new_fg );
textbackground( new_bg );
} /* set_attribute */
void display_char( int c )
{
char string[2];
string[0] = ( char ) c;
string[1] = '\0';
cputs( string );
if ( string[0] == '\n' )
{
display_char( '\r' );
}
} /* display_char */
/*
* Previous command system
*
* Here's how this works:
*
* The previous command buffer is BUFFER_SIZE bytes long. After the player
* presses Enter, the command is added to this buffer, with a trailing '\n'
* added. The '\n' is used to show where one command ends and another begins.
*
* The up arrow key retrieves a previous command. This is done by working
* backwards through the buffer until a '\n' is found. The down arrow
* retieves the next command by counting forward. The ptr1 and ptr2
* values hold the start and end of the currently displayed command.
*
*
* Special Key Summary:
*
* left arrow - move one character to the left
* right arrow - move one character to the right
* ctrl + left arrow - move one word to the left
* ctrl + right arrow - move one word to the right
* home - move to beginning of line
* end - move to end of line
* backspace - delete character to the left of the cursor
* delete - delete character below cursor
* cursor up - get previous command
* cursor down - get next command
* page up - get "oldest" command
* page down - display blank prompt (i.e. clears current line)
* esc - display blank prompt (i.e. clears current line)
*
*/
int display_command( char *buffer )
{
int counter, loop;
move_cursor( row, head_col );
clear_line( );
/* ptr1 = end_ptr when the player has selected beyond any previously
* * saved command.
*/
if ( ptr1 == end_ptr )
{
return ( 0 );
}
else
{
/* Put the characters from the save buffer into the variable "buffer".
* The return value (counter) is the value of *read_size.
*/
counter = 0;
for ( loop = ptr1; loop <= ptr2; loop++ )
{
buffer[counter] = commands[loop];
display_char( buffer[counter++] );
}
return ( counter );
}
} /* display_command */
void get_prev_command( void )
{
/* Checking to see if ptr1 > 0 prevents moving ptr1 and ptr2 into
* never-never land.
*/
if ( ptr1 > 0 )
{
/* Subtract 2 to jump over any intervening '\n' */
ptr2 = ptr1 -= 2;
/* If we've jumped too far, fix it */
if ( ptr1 < 0 )
ptr1 = 0;
if ( ptr2 < 0 )
ptr2 = 0;
if ( ptr1 > 0 )
{
do
{ /* Decrement ptr1 until a '\n' is found */
ptr1--;
}
while ( ( commands[ptr1] != '\n' ) && ( ptr1 >= 0 ) );
/* Then advance back to the position after the '\n' */
ptr1++;
}
}
} /* get_prev_command */
void get_next_command( void )
{
if ( ptr2 < end_ptr )
{
/* Add 2 to advance over any intervening '\n' */
ptr1 = ptr2 += 2;
if ( ptr2 >= end_ptr )
{
ptr1 = ptr2 = end_ptr;
}
else
{
do
{
ptr2++;
}
while ( ( commands[ptr2] != '\n' ) && ( ptr2 <= end_ptr ) );
ptr2--;
}
}
} /* get_next_command */
void get_first_command( void )
{
if ( end_ptr > 1 )
{
ptr1 = ptr2 = 0;
do
{
ptr2++;
}
while ( commands[ptr2] != '\n' );
ptr2--;
}
} /* get_first_command */
void delete_command( void )
{
/* Deletes entire commands from the beginning of the command buffer */
int loop;
/* Keep moving the characters in the command buffer one space to the left
* until a '\n' is found...
*/
do
{
for ( loop = 0; loop < end_ptr; loop++ )
{
commands[loop] = commands[loop + 1];
}
end_ptr--;
space_avail++;
}
while ( commands[0] != '\n' );
/* ...then delete the '\n' */
for ( loop = 0; loop < end_ptr; loop++ )
{
commands[loop] = commands[loop + 1];
}
end_ptr--;
space_avail++;
ptr1 = ptr2 = end_ptr;
} /* delete_command */
void add_command( char *buffer, int size )
{
int loop, counter;
/* Add the player's last command to the command buffer */
counter = 0;
for ( loop = end_ptr; loop < ( end_ptr + size ); loop++ )
{
commands[loop] = buffer[counter++];
}
/* Add one space for '\n' */
end_ptr += size + 1;
ptr1 = ptr2 = end_ptr;
commands[end_ptr - 1] = '\n';
space_avail -= size + 1;
} /* add_command */
int input_line( int buflen, char *buffer, int timeout, int *read_size )
{
int c, col;
int init_char_pos, curr_char_pos;
int loop, tail_col;
/*
* init_char_pos : the initial cursor location
* curr_char_pos : the current character position within the input line
* head_col: the head of the input line (used for cursor position)
* (global variable)
* tail_col: the end of the input line (used for cursor position)
*/
/*
if (timeout != 0) {
ftime (&timenow);
/* tmptr = gmtime (&timenow.time);
target_second = (tmptr->tm_sec + (timeout/10));*/
/* target_second = timenow.time + (timeout/10);
target_millisecond = timenow.millitm + (timeout*10);
while (target_millisecond >= 1000)
{
target_millisecond -= 1000;
target_second++;
}
}
*/
get_cursor_position( &row, &col );
head_col = tail_col = col;
init_char_pos = curr_char_pos = *read_size;
ptr1 = ptr2 = end_ptr;
for ( ;; )
{
/* Read a single keystroke */
do
{
if ( timeout == 0 )
{
c = read_key( );
}
else
{
c = timed_read_key( timeout );
if ( c == -1 )
return ( c );
}
}
while ( c == 0 );
/****** Previous Command Selection Keys ******/
if ( c == ( unsigned char ) '\x081' )
{ /* Up arrow */
get_prev_command( );
curr_char_pos = *read_size = display_command( buffer );
tail_col = head_col + *read_size;
}
else if ( c == ( unsigned char ) '\x082' )
{ /* Down arrow */
get_next_command( );
curr_char_pos = *read_size = display_command( buffer );
tail_col = head_col + *read_size;
}
else if ( c == ( unsigned char ) '\x09a' )
{ /* PgUp */
get_first_command( );
curr_char_pos = *read_size = display_command( buffer );
tail_col = head_col + *read_size;
}
else if ( ( c == ( unsigned char ) '\x094' ) || ( c == ( unsigned char ) '\x0bc' ) )
{ /* PgDn or Esc */
ptr1 = ptr2 = end_ptr;
curr_char_pos = *read_size = display_command( buffer );
tail_col = head_col + *read_size;
}
/****** Cursor Editing Keys ******/
else if ( c == ( unsigned char ) '\x083' )
{ /* Left arrow */
get_cursor_position( &row, &col );
/* Prevents moving the cursor into the prompt */
if ( col > head_col )
{
move_cursor( row, --col );
curr_char_pos--;
}
}
else if ( c == ( unsigned char ) '\x0aa' )
{ /* Ctrl + Left arrow */
get_cursor_position( &row, &col );
if ( col > head_col )
{
col--;
curr_char_pos--;
do
{
/* Decrement until a ' ' is found */
col--;
curr_char_pos--;
}
while ( ( buffer[curr_char_pos] != ' ' ) && ( col >= head_col ) );
curr_char_pos++;
move_cursor( row, ++col );
}
}
else if ( c == ( unsigned char ) '\x084' )
{ /* Right arrow */
get_cursor_position( &row, &col );
/* Prevents moving the cursor beyond the end of the input line */
if ( col < tail_col )
{
move_cursor( row, ++col );
curr_char_pos++;
}
}
else if ( c == ( unsigned char ) '\x0ba' )
{ /* Ctrl + Right arrow */
get_cursor_position( &row, &col );
if ( col < tail_col )
{
do
{
/* Increment until a ' ' is found */
col++;
curr_char_pos++;
}
while ( ( buffer[curr_char_pos] != ' ' ) && ( col < tail_col ) );
if ( col == tail_col )
{
move_cursor( row, tail_col );
}
else
{
curr_char_pos++;
move_cursor( row, ++col );
}
}
}
else if ( c == ( unsigned char ) '\x092' )
{ /* End */
move_cursor( row, tail_col );
curr_char_pos = init_char_pos + *read_size;
}
else if ( c == ( unsigned char ) '\x098' )
{ /* Home */
move_cursor( row, head_col );
curr_char_pos = init_char_pos;
}
else if ( c == ( unsigned char ) '\x096' )
{ /* Delete */
if ( curr_char_pos < *read_size )
{
get_cursor_position( &row, &col );
/* Moves the input line one to the left */
for ( loop = curr_char_pos; loop < *read_size; loop++ )
{
buffer[loop] = buffer[loop + 1];
}
/* Decrements the end of the input line and the *read_size value */
tail_col--;
( *read_size )--;
/* Displays the input line */
clear_line( );
for ( loop = curr_char_pos; loop < *read_size; loop++ )
{
display_char( buffer[loop] );
}
/* Restores the cursor position */
move_cursor( row, col );
}
}
else if ( c == '\b' )
{ /* Backspace */
get_cursor_position( &row, &col );
if ( col > head_col )
{
move_cursor( row, --col );
clear_line( );
for ( loop = curr_char_pos; loop < *read_size; loop++ )
{
buffer[loop - 1] = buffer[loop];
display_char( buffer[loop - 1] );
}
curr_char_pos--;
tail_col--;
( *read_size )--;
move_cursor( row, col );
}
}
else
{ /* Normal key action */
if ( *read_size == ( buflen - 1 ) )
{ /* Ring bell if buffer is full */
putchar( '\a' );
}
else
{ /* Scroll line if return key pressed */
if ( c == '\r' || c == '\n' )
{
c = '\n';
scroll_line( );
}
if ( ( c == '\n' ) || ( c > ( unsigned char ) '\x080' ) )
{ /* Add the current command to the command buffer */
if ( *read_size > space_avail )
{
do
{
delete_command( );
}
while ( *read_size > space_avail );
}
if ( *read_size > 0 )
{
add_command( buffer, *read_size );
}
/* Return key if it is a line terminator */
return ( ( unsigned char ) c );
}
else
{
get_cursor_position( &row, &col );
/* Used if the cursor is not at the end of the line */
if ( col < tail_col )
{
/* Moves the input line one character to the right */
for ( loop = *read_size; loop >= curr_char_pos; loop-- )
{
buffer[loop + 1] = buffer[loop];
}
/* Puts the character into the space created by the
* "for" loop above */
buffer[curr_char_pos] = ( char ) c;
/* Increment the end of the line values */
( *read_size )++;
tail_col++;
/* Move the cursor back to its original position */
move_cursor( row, col );
/* Redisplays the input line from the point of
* * insertion */
for ( loop = curr_char_pos; loop < *read_size; loop++ )
{
display_char( buffer[loop] );
}
/* Moves the cursor to the next position */
move_cursor( row, ++col );
curr_char_pos++;
}
else
{ /* Used if the cursor is at the end of the line */
buffer[curr_char_pos++] = ( char ) c;
display_char( c );
( *read_size )++;
tail_col++;
}
}
}
}
}
} /* input_line */
int input_character( int timeout )
{
int c;
if ( timeout == 0 )
{
c = read_key( );
}
else
{
c = timed_read_key( timeout );
}
return ( c );
} /* input_character */
int timed_read_key( int timeout )
{
int c;
register clock_t curr_tick, target_tick;
/* do math BEFORE calling clock for stability */
target_tick = ( int ) ( timeout * CLK_TCK ) / 10;
target_tick += clock( );
for ( ;; )
{
do
{
curr_tick = clock( );
}
while ( ( curr_tick < target_tick ) && !kbhit( ) );
if ( !kbhit( ) )
{
return ( -1 );
}
else
{
c = read_key( );
if ( c > 31 || c == 8 || c == 13 )
{
return ( c );
}
}
} /* for */
} /* timed_read_key */
int read_key( void )
{
int c;
read_key_top:
c = getch( );
if ( c < 32 && !( c == 0 || c == 8 || c == 13 ) )
goto read_key_top;
if ( c != '\0' && c != ( unsigned char ) '\x0e0' )
{
if ( c == '\x07f' )
{
c = '\b';
}
return ( c );
}
c = getch( );
if ( c == 'H' )
return ( ( unsigned char ) '\x081' ); /* Up arrow */
else if ( c == 'P' )
return ( ( unsigned char ) '\x082' ); /* Down arrow */
else if ( c == 'K' )
return ( ( unsigned char ) '\x083' ); /* Left arrow */
else if ( c == 'M' )
return ( ( unsigned char ) '\x084' ); /* Right arrow */
else if ( c == 'O' )
return ( ( unsigned char ) '\x092' ); /* End (SW) */
else if ( c == 'Q' )
return ( ( unsigned char ) '\x094' ); /* PgDn (SE) */
else if ( c == 'S' )
return ( ( unsigned char ) '\x096' ); /* Delete */
else if ( c == 'G' )
return ( ( unsigned char ) '\x098' ); /* Home (NW) */
else if ( c == 'I' )
return ( ( unsigned char ) '\x09a' ); /* PgUp (NE) */
else if ( c == 's' )
return ( ( unsigned char ) '\x0aa' ); /* Ctrl + Left Arrow */
else if ( c == 't' )
return ( ( unsigned char ) '\x0ba' ); /* Ctrl + Right Arrow */
else if ( c >= ';' && c <= 'D' ) /* Function keys F1 to F10 */
return ( ( c - ';' ) + ( unsigned char ) '\x085' );
return ( 0 );
} /* read_key */
void scroll_line( void )
{
struct text_info ti;
int row, col;
get_cursor_position( &row, &col );
gettextinfo( &ti );
if ( row == ti.winbottom )
{
window( ti.winleft, status_size + 1, ti.winright, ti.winbottom );
movetext( ti.winleft, status_size + 2, ti.winright, ti.winbottom, ti.winleft,
status_size + 1 );
window( ti.winleft, ti.winbottom, ti.winright, ti.winbottom );
clrscr( );
window( ti.winleft, ti.wintop, ti.winright, ti.winbottom );
}
else
{
row++;
}
move_cursor( row, ti.winleft );
} /* scroll_line */
/*
* set_colours
*
* Sets the screen foreground and background colours.
*
*/
void set_colours( zword_t foreground, zword_t background )
{
ZINT16 fg, bg;
int colour_map[] = { BLACK, RED, GREEN, BROWN, BLUE, MAGENTA, CYAN, WHITE };
/* Translate from Z-code colour values to natural colour values */
if ( ( ZINT16 ) foreground >= 1 && ( ZINT16 ) foreground <= 9 )
{
fg = ( foreground == 1 ) ? default_fg : colour_map[( ZINT16 ) foreground - 2];
}
if ( ( ZINT16 ) background >= 1 && ( ZINT16 ) background <= 9 )
{
bg = ( background == 1 ) ? default_bg : colour_map[( ZINT16 ) background - 2];
}
/* Set foreground and background colour */
textcolor( fg );