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unixio.c
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unixio.c
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/* $Id: unixio.c,v 1.3 2000/10/04 23:06:24 jholder Exp $
* --------------------------------------------------------------------
* see doc/License.txt for License Information
* --------------------------------------------------------------------
*
* File name: $Id: unixio.c,v 1.3 2000/10/04 23:06:24 jholder Exp $
*
* Description:
*
* Modification history:
* $Log: unixio.c,v $
* Revision 1.3 2000/10/04 23:06:24 jholder
* made zscii2latin1 table global
*
* Revision 1.2 2000/06/29 20:42:04 jholder
* fixed termcap scroll bug
*
* Revision 1.1.1.1 2000/05/10 14:20:51 jholder
*
* imported
*
*
* --------------------------------------------------------------------
*/
/* unixio.c */
/* *JWK* Altered by John W. Kennedy */
/* *JWK* Source code made safe (naughty bytes hexed) */
/* *JWK* Right margin forced to 1 only where needed */
/* *JWK* 2000-02-29 */
#include "ztypes.h"
#include <unistd.h>
#include <wctype.h>
#if defined(BSD)
#include <sgtty.h>
#elif defined(SYSTEM_FIVE)
#include <termio.h>
#elif defined(POSIX)
#include <termios.h>
#endif /* defined(POSIX) */
#include <signal.h>
#include <sys/types.h>
#include <sys/time.h>
/* needed by AIX */
#if defined(AIX)
#include <sys/select.h>
#endif
#define EXTENDED 1
#define PLAIN 2
#ifdef HARD_COLORS
static ZINT16 current_fg;
static ZINT16 current_bg;
#endif
extern ZINT16 default_fg;
extern ZINT16 default_bg;
extern int hist_buf_size;
extern int use_bg_color;
/* new stuff for command editing */
int BUFFER_SIZE;
char *commands;
int space_avail;
static int ptr1, ptr2 = 0;
static int end_ptr = 0;
static int row, head_col;
/* done with editing global info */
static int current_row = 1;
static int current_col = 1;
static int saved_row;
static int saved_col;
static int cursor_saved = OFF;
static int disable_wrap;
static char tcbuf[1024];
static char cmbuf[1024];
static char *cmbufp;
static char *CE, *CL, *CM, *CS, *DL, *MD, *ME, *MR, *SE, *SO, *TE, *TI, *UE, *US, *KD, *KL, *KR,
*KU, *RA, *SA, *KP, *KN, *KI, *KH, *Kd, *BL;
#define GET_TC_STR(p1, p2) if ((p1 = tgetstr (p2, &cmbufp)) == NULL) p1 = ""
#define BELL 7
static void display_string( char *s );
static int wait_for_char( );
static int read_key( int );
static void set_cbreak_mode( int );
#if 0
static void rundown( );
static void sig_rundown( );
#endif
void get_prev_command( );
void get_next_command( );
void get_first_command( );
void delete_command( );
void add_command( char *, int );
int display_command( char * );
int input_line( int, char *, int, int *, int );
int input_character( int );
static int wait_for_char( int );
void outc( int );
void move_cursor( int, int );
void get_cursor_position( int *, int * );
void set_attribute( int );
void display_char( int );
/* done with editing prototypes */
extern int tgetent( );
extern int tgetnum( );
extern char *tgetstr( );
extern char *tgoto( );
extern int tputs( );
extern int tgetflag( );
/* print unicode char <= 0xffff in utf-8 */
void outc( int c )
{
if ( c <= 0x7f )
putchar( c );
else if ( c < 0x7ff )
{
char s[3];
s[0] = 0xc0 | ( c >> 6 );
s[1] = 0x80 | ( c & 0x3f );
s[2] = 0;
fputs( s, stdout );
}
else if ( c < 0x10000 )
{
char s[4];
s[0] = 0xe0 | ( c >> 12 );
s[1] = 0x80 | ( ( c >> 6 ) & 0x3f );
s[2] = 0x80 | ( c & 0x3f );
s[3] = 0;
fputs( s, stdout );
}
else
putchar('?');
} /* outc */
void initialize_screen( )
{
char *term;
int row, col;
if ( ( term = getenv( "TERM" ) ) == NULL )
fatal( "initialize_screen(): No TERM environment variable" );
if ( tgetent( tcbuf, term ) <= 0 )
fatal( "initialize_screen(): No termcap entry for this terminal" );
cmbufp = cmbuf;
/* COMMENTS to aid in porting to other sys. */
GET_TC_STR( CE, "ce" ); /* clear to end of line */
GET_TC_STR( CL, "cl" ); /* clear screen, home cursor */
GET_TC_STR( CM, "cm" ); /* screen-rel cursor motion to row m, col n */
GET_TC_STR( CS, "cs" ); /* change scroll region to lines m thru n */
GET_TC_STR( DL, "dl" ); /* delete line */
GET_TC_STR( MD, "md" ); /* turn on bold attribute */
GET_TC_STR( ME, "me" ); /* turn off all attributes */
GET_TC_STR( MR, "mr" ); /* turn on reverse video attribute */
GET_TC_STR( SE, "se" ); /* end standout mode */
GET_TC_STR( SO, "so" ); /* begin standout mode */
GET_TC_STR( TE, "te" ); /* string to end a termcap program */
GET_TC_STR( TI, "ti" ); /* string to begin a termcap program */
GET_TC_STR( UE, "ue" ); /* end underscore mode */
GET_TC_STR( US, "us" ); /* begin underscore mode */
GET_TC_STR( KU, "ku" ); /* sent by keypad up arrow */
GET_TC_STR( KD, "kd" ); /* sent by keypad down arrow */
GET_TC_STR( KL, "kl" ); /* sent by keypad left arrow */
GET_TC_STR( KR, "kr" ); /* sent by keypad right arrow */
GET_TC_STR( RA, "RA" ); /* disable wrap */
GET_TC_STR( SA, "SA" ); /* enable wrap */
GET_TC_STR( KP, "kP" ); /* sent by PgUp key */
GET_TC_STR( KN, "kN" ); /* sent by PgDn key */
GET_TC_STR( KI, "kI" ); /* sent by Insert key */
GET_TC_STR( KH, "kh" ); /* sent by Home key */
GET_TC_STR( Kd, "kD" ); /* sent by Delete key */
GET_TC_STR( BL, "bl" ); /* bell */
disable_wrap = tgetflag( "am" );
if ( *RA == '\0' || *SA == '\0' )
{
disable_wrap = 0;
}
if ( !disable_wrap && right_margin == 0 && tgetflag( "am" ) && !tgetflag( "xn" ) ) /* *JWK* */
right_margin = 1; /* *JWK* */
if ( screen_cols == 0 && ( screen_cols = tgetnum( "co" ) ) == -1 )
screen_cols = DEFAULT_COLS;
if ( screen_rows == 0 && ( screen_rows = tgetnum( "li" ) ) == -1 )
screen_rows = DEFAULT_ROWS;
if ( *MD == '\0' || *ME == '\0' || *MR == '\0' )
{
MD = SO;
ME = SE;
MR = SO;
}
if ( *UE == '\0' || *US == '\0' )
{
UE = SE;
US = SO;
}
tputs( TI, 1, outc );
if ( disable_wrap )
tputs( RA, 1, outc );
set_attribute( NORMAL );
#if defined HARD_COLORS
#if 0
if ( default_bg < 0 )
{
use_bg_color = 0;
printf( "\x1B[1m" );
default_bg = 0;
}
#endif
set_colours( 1, 1 );
#endif
clear_screen( );
row = screen_rows / 2 - 1;
col = ( screen_cols - ( sizeof ( JZIPVER ) - 1 ) ) / 2;
move_cursor( row, col );
display_string( JZIPVER );
row = screen_rows / 2;
col = ( screen_cols - ( sizeof ( "The story is loading..." ) - 1 ) ) / 2;
move_cursor( row, col );
display_string( "The story is loading..." );
/* Last release (2.0.1g) claimed DEC tops 20. I'm a sadist. Sue me. */
h_interpreter = INTERP_MSDOS;
JTERP = INTERP_UNIX;
commands = ( char * ) malloc( hist_buf_size * sizeof ( char ) );
if ( commands == NULL )
fatal( "initialize_screen(): Could not allocate history buffer." );
BUFFER_SIZE = hist_buf_size;
space_avail = hist_buf_size - 1;
set_cbreak_mode( 1 );
interp_initialized = 1;
} /* initialize_screen */
void restart_screen( )
{
zbyte_t high = 1, low = 0;
/* changing the character set is not standard compiant */
if ( fIBMGraphics )
high = 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 ) );
#if defined HARD_COLORS
if ( !monochrome )
set_byte( H_CONFIG, ( get_byte( H_CONFIG ) | CONFIG_COLOUR ) );
set_byte( H_BG_DEFAULT_COLOR, default_bg + 2 );
set_byte( H_FG_DEFAULT_COLOR, default_fg + 2 );
#endif
/* turn stuff off */
set_byte( H_CONFIG, ( get_byte( H_CONFIG ) & ~CONFIG_PICTURES & ~CONFIG_SFX ) );
}
/* Force graphics and sound off as we can't do them */
set_word( H_FLAGS, ( get_word( H_FLAGS ) & ~GRAPHICS_FLAG & ~NEW_SOUND_FLAG ) );
} /* restart_screen */
void reset_screen( )
{
/* only do this stuff on exit when called AFTER initialize_screen */
if ( interp_initialized )
{
scroll_line();
display_string( "[Hit any key to exit.]" );
getchar( );
move_cursor( screen_rows, 1 );
delete_status_window( );
select_text_window( );
#if defined HARD_COLORS
printf( "\x1B[0m" );
#else
set_attribute( NORMAL );
#endif
set_cbreak_mode( 0 );
if ( disable_wrap )
tputs( SA, 1, outc );
tputs( TE, 1, outc );
}
display_string( "\n" );
} /* reset_screen */
void sig_reset_screen( )
{
/* only do this stuff on exit when called AFTER initialize_screen */
if ( interp_initialized )
{
delete_status_window( );
select_text_window( );
#if defined HARD_COLORS
printf( "\x1B[0m" );
#else
set_attribute( NORMAL );
#endif
set_cbreak_mode( 0 );
tputs( TE, 1, outc );
}
display_string( "\n" );
} /* sig_reset_screen */
void clear_screen( )
{
/*
tputs (CL, 1, outc);
*/
int row;
for ( row = 1; row <= screen_rows; row++ )
{
move_cursor( row, 1 );
clear_line( );
}
move_cursor( 1, 1 );
} /* clear_screen */
void select_status_window( )
{
save_cursor_position( );
} /* select_status_window */
void select_text_window( )
{
restore_cursor_position( );
} /* select_text_window */
void create_status_window( )
{
int row, col;
if ( *CS )
{
get_cursor_position( &row, &col );
tputs( tgoto( CS, screen_rows - 1, status_size ), 1, outc );
move_cursor( row, col );
}
} /* create_status_window */
void delete_status_window( )
{
int row, col;
if ( *CS )
{
get_cursor_position( &row, &col );
tputs( tgoto( CS, screen_rows - 1, 0 ), 1, outc );
move_cursor( row, col );
}
} /* delete_status_window */
void clear_line( )
{
/* tputs (CE, 1, outc);*/
int i;
for ( i = 1; i <= screen_cols; i++ )
outc( ' ' );
} /* clear_line */
void clear_text_window( )
{
int i, row, col;
get_cursor_position( &row, &col );
for ( i = status_size + 1; i <= screen_rows; i++ )
{
move_cursor( i, 1 );
clear_line( );
}
move_cursor( row, col );
} /* clear_text_window */
void clear_status_window( )
{
int i, row, col;
get_cursor_position( &row, &col );
for ( i = status_size; i; i-- )
{
move_cursor( i, 1 );
clear_line( );
}
move_cursor( row, col );
} /* clear_status_window */
void move_cursor( int row, int col )
{
tputs( tgoto( CM, col - 1, row - 1 ), 1, outc );
current_row = row;
current_col = col;
} /* move_cursor */
void get_cursor_position( int *row, int *col )
{
*row = current_row;
*col = current_col;
} /* get_cursor_position */
void save_cursor_position( )
{
if ( cursor_saved == OFF )
{
get_cursor_position( &saved_row, &saved_col );
cursor_saved = ON;
}
} /* save_cursor_position */
void restore_cursor_position( )
{
if ( cursor_saved == ON )
{
move_cursor( saved_row, saved_col );
cursor_saved = OFF;
}
} /* restore_cursor_position */
void set_attribute( int attribute )
{
#if defined HARD_COLORS
static int emph = 0, rev = 0;
if ( attribute == NORMAL )
{
if ( use_bg_color )
{
printf( "\x1B[0m" );
}
else
{
if ( emph || rev )
{
emph = 0;
rev = 0;
printf( "\x1B[0m\x1B[1m" );
}
}
}
if ( attribute & REVERSE )
{
printf( "\x1B[7m" );
rev = 1;
}
if ( attribute & BOLD )
{
if ( use_bg_color )
{
printf( "\x1B[1m" );
}
}
if ( attribute & EMPHASIS )
{
printf( "\x1B[4m" );
emph = 1;
}
if ( attribute & FIXED_FONT )
{
}
printf( "\x1B[%dm", current_bg );
printf( "\x1B[%dm", current_fg );
#else
if ( attribute == NORMAL )
{
tputs( ME, 1, outc );
tputs( UE, 1, outc );
}
if ( attribute & REVERSE )
tputs( MR, 1, outc );
if ( attribute & BOLD )
tputs( MD, 1, outc );
if ( attribute & EMPHASIS )
tputs( US, 1, outc );
if ( attribute & FIXED_FONT )
;
#endif
} /* set_attribute */
static void display_string( char *s )
{
while ( *s )
display_char( *s++ );
} /* display_string */
void display_char( int c )
{
if ( c == 7 && BL )
{
tputs( BL, 1, outc );
return;
}
outc( c );
if ( ++current_col > screen_cols )
current_col = screen_cols;
} /* display_char */
void scroll_line( )
{
int row, col;
int i;
get_cursor_position( &row, &col );
if ( *CS || row < screen_rows )
{
for ( i = col; i < screen_cols; i++ )
outc( ' ' ); /* BUGFIX */
display_char( '\n' );
}
else
{
move_cursor( status_size + 1, 1 );
tputs( DL, 1, outc );
move_cursor( row, 1 );
for ( i = col; i < screen_cols; i++ )
outc( ' ' ); /* BUGFIX */
}
current_col = 1;
if ( ++current_row > screen_rows )
{
current_row = screen_rows;
move_cursor( current_row, 1 );
for ( i = 1; i < screen_cols; i++ )
outc( ' ' ); /* BUGFIX */
move_cursor( current_row, 1 );
}
} /* scroll_line */
/*
* 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.
*
* PgUp displays the first ("oldest") command, while PgDn displays a blank
* prompt.
*/
int display_command( char *buffer )
{
int counter, loop;
move_cursor( row, head_col );
tputs (CE, 1, outc); /* fix scoll bug w/ command history */
/* 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( translate_from_zscii ( buffer[counter++] ) );
}
return ( counter );
}
} /* display_command */
void get_prev_command( )
{
/* 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 ( ( ptr1 >= 0 ) && ( commands[ptr1] != '\n' ) );
/* Then advance back to the position after the '\n' */
ptr1++;
}
}
} /* get_prev_command */
void get_next_command( )
{
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( )
{
if ( end_ptr > 1 )
{
ptr1 = ptr2 = 0;
do
ptr2++;
while ( commands[ptr2] != '\n' );
ptr2--;
}
} /* get_first_command */
void delete_command( )
{
/* 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 = 1; loop < end_ptr; loop++ )
{
commands[loop - 1] = commands[loop];
}
end_ptr--;
space_avail++;
}
while ( commands[0] != '\n' );
/* ...then delete the '\n' */
for ( loop = 1; loop < end_ptr; loop++ )
{
commands[loop - 1] = commands[loop];
}
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 start_col )
{
int c, col;
int init_char_pos, curr_char_pos;
int loop, tail_col;
int keyfunc = 0;
struct timeval t0, t1;
/*
* 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)
*/
get_cursor_position( &row, &col );
head_col = start_col;
tail_col = start_col + *read_size;
init_char_pos = curr_char_pos = col - start_col;
ptr1 = ptr2 = end_ptr;
gettimeofday( &t0, NULL );
for ( ;; )
{
keyfunc = 0;
/* Read a single keystroke */
fflush( stdout );
if ( timeout != 0 )
{
int dt, rem_time;
gettimeofday( &t1, NULL );
dt = ( t1.tv_sec - t0.tv_sec ) * 10 + ( t1.tv_usec - t0.tv_usec ) / 100000;
rem_time = timeout - dt;
if ( rem_time <= 0 || wait_for_char( rem_time ) )
return ( -1 );
}
c = read_key( EXTENDED );
/****** Previous Command Selection Keys ******/
if ( line_editing )
{
if ( c == 0x81 )
{ /* Up arrow */
get_prev_command( );
curr_char_pos = *read_size = display_command( buffer );
tail_col = head_col + *read_size;
keyfunc = 1;
}
else if ( c == 0x82 )
{ /* Down arrow */
get_next_command( );
curr_char_pos = *read_size = display_command( buffer );
tail_col = head_col + *read_size;
keyfunc = 1;
}
else if ( fIBMGraphics && c == 0x09a )
{ /* PgUp passed as up arrow */
c = 0x81;
}
else if ( c == 0x9a )
{ /* PgUp */
get_first_command( );
curr_char_pos = *read_size = display_command( buffer );
tail_col = head_col + *read_size;
keyfunc = 1;
}
else if ( fIBMGraphics && c == 0x094 )
{ /* PgDn passed as down arrow */
c = 0x82;
}
else if (c == 0x94 || c == 27)
{ /* PgDn or Esc */
ptr1 = ptr2 = end_ptr;
curr_char_pos = *read_size = display_command( buffer );
tail_col = head_col + *read_size;
keyfunc = 1;
}
/****** Cursor Editing Keys ******/
else if ( c == 0x83 )
{ /* 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--;
}
keyfunc = 1;
}
else if ( c == 0x84 )
{ /* 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++;
}
keyfunc = 1;
}
else if ( c == 0x92 )
{ /* End */
move_cursor( row, tail_col );
curr_char_pos = init_char_pos + *read_size;
keyfunc = 1;
}
else if ( c == 0x98 )
{ /* Home */
move_cursor( row, head_col );
curr_char_pos = init_char_pos;
keyfunc = 1;
}
else if ( c == 0x7f )
{ /* Delete */
if ( curr_char_pos < *read_size )
{
get_cursor_position ( &row, &col );
for ( loop = curr_char_pos; loop < *read_size; loop++ )
{
buffer[loop] = buffer[loop + 1];
}
tail_col--;
( *read_size )--;
for ( loop = curr_char_pos; loop < *read_size; loop++ )
{
display_char( buffer[loop] );
}
display_char( ' ' );
move_cursor( row, col );
}
keyfunc = 1;
}
}
if ( !keyfunc )
{
if ( c >= 0x81 && c <= 0x9a )
{
int addr = get_word( H_FUNCTION_KEYS_OFFSET );
if ( h_type >= V5 && addr > 0 )
{
int t;
/* Check for game specifiec terminating character */
while ( ( t = get_byte( addr++ ) ) != 0 )
{
if ( t == c || t == 255 )
{
move_cursor( row, tail_col );
return c;
}
}
}
}
else if ( c == '\b' || c == 0x7f ) /* Backspace or Delete */
{
get_cursor_position( &row, &col );
if ( col > head_col )
{
move_cursor( row, --col );
for ( loop = curr_char_pos; loop < *read_size; loop++ )
{
buffer[loop - 1] = buffer[loop];
display_char( translate_from_zscii( buffer[loop - 1] ) );
}
display_char( ' ' );
curr_char_pos--;
tail_col--;
( *read_size )--;
move_cursor( row, col );
}
}
else if ( c != 27 )
{