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rockbox/apps/plugins/frotz/stream.c
Torne Wuff 7f28c94eda New plugin: frotz, a Z-machine interpreter, for playing interactive fiction. 
The interpreter more or less passes all the tests in the z-machine test suite.
It should build for every target except Archos (for which it is disabled).


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24267 a1c6a512-1295-4272-9138-f99709370657
2010-01-17 22:15:13 +00:00

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/* stream.c - IO stream implementation
* Copyright (c) 1995-1997 Stefan Jokisch
*
* This file is part of Frotz.
*
* Frotz is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Frotz is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include "frotz.h"
extern bool handle_hot_key (zchar);
extern bool validate_click (void);
extern void replay_open (void);
extern void replay_close (void);
extern void memory_open (zword, zword, bool);
extern void memory_close (void);
extern void record_open (void);
extern void record_close (void);
extern void script_open (void);
extern void script_close (void);
extern void memory_word (const zchar *);
extern void memory_new_line (void);
extern void record_write_key (zchar);
extern void record_write_input (const zchar *, zchar);
extern void script_char (zchar);
extern void script_word (const zchar *);
extern void script_new_line (void);
extern void script_write_input (const zchar *, zchar);
extern void script_erase_input (const zchar *);
extern void script_mssg_on (void);
extern void script_mssg_off (void);
extern void screen_char (zchar);
extern void screen_word (const zchar *);
extern void screen_new_line (void);
extern void screen_write_input (const zchar *, zchar);
extern void screen_erase_input (const zchar *);
extern void screen_mssg_on (void);
extern void screen_mssg_off (void);
extern zchar replay_read_key (void);
extern zchar replay_read_input (zchar *);
extern zchar console_read_key (zword);
extern zchar console_read_input (int, zchar *, zword, bool);
extern int direct_call (zword);
/*
* stream_mssg_on
*
* Start printing a "debugging" message.
*
*/
void stream_mssg_on (void)
{
flush_buffer ();
if (ostream_screen)
screen_mssg_on ();
if (ostream_script && enable_scripting)
script_mssg_on ();
message = TRUE;
}/* stream_mssg_on */
/*
* stream_mssg_off
*
* Stop printing a "debugging" message.
*
*/
void stream_mssg_off (void)
{
flush_buffer ();
if (ostream_screen)
screen_mssg_off ();
if (ostream_script && enable_scripting)
script_mssg_off ();
message = FALSE;
}/* stream_mssg_off */
/*
* z_output_stream, open or close an output stream.
*
* zargs[0] = stream to open (positive) or close (negative)
* zargs[1] = address to redirect output to (stream 3 only)
* zargs[2] = width of redirected output (stream 3 only, optional)
*
*/
void z_output_stream (void)
{
flush_buffer ();
switch ((short) zargs[0]) {
case 1: ostream_screen = TRUE;
break;
case -1: ostream_screen = FALSE;
break;
case 2: if (!ostream_script) script_open ();
break;
case -2: if (ostream_script) script_close ();
break;
case 3: memory_open (zargs[1], zargs[2], zargc >= 3);
break;
case -3: memory_close ();
break;
case 4: if (!ostream_record) record_open ();
break;
case -4: if (ostream_record) record_close ();
break;
}
}/* z_output_stream */
/*
* stream_char
*
* Send a single character to the output stream.
*
*/
void stream_char (zchar c)
{
if (ostream_screen)
screen_char (c);
if (ostream_script && enable_scripting)
script_char (c);
}/* stream_char */
/*
* stream_word
*
* Send a string of characters to the output streams.
*
*/
void stream_word (const zchar *s)
{
if (ostream_memory && !message)
memory_word (s);
else {
if (ostream_screen)
screen_word (s);
if (ostream_script && enable_scripting)
script_word (s);
}
}/* stream_word */
/*
* stream_new_line
*
* Send a newline to the output streams.
*
*/
void stream_new_line (void)
{
if (ostream_memory && !message)
memory_new_line ();
else {
if (ostream_screen)
screen_new_line ();
if (ostream_script && enable_scripting)
script_new_line ();
}
}/* stream_new_line */
/*
* z_input_stream, select an input stream.
*
* zargs[0] = input stream to be selected
*
*/
void z_input_stream (void)
{
flush_buffer ();
if (zargs[0] == 0 && istream_replay)
replay_close ();
if (zargs[0] == 1 && !istream_replay)
replay_open ();
}/* z_input_stream */
/*
* stream_read_key
*
* Read a single keystroke from the current input stream.
*
*/
zchar stream_read_key ( zword timeout, zword routine,
bool hot_keys )
{
zchar key = ZC_BAD;
flush_buffer ();
/* Read key from current input stream */
continue_input:
do {
if (istream_replay)
key = replay_read_key ();
else
key = console_read_key (timeout);
} while (key == ZC_BAD);
/* Verify mouse clicks */
if (key == ZC_SINGLE_CLICK || key == ZC_DOUBLE_CLICK)
if (!validate_click ())
goto continue_input;
/* Copy key to the command file */
if (ostream_record && !istream_replay)
record_write_key (key);
/* Handle timeouts */
if (key == ZC_TIME_OUT)
if (direct_call (routine) == 0)
goto continue_input;
/* Handle hot keys */
if (hot_keys && key >= ZC_HKEY_MIN && key <= ZC_HKEY_MAX) {
if (h_version == V4 && key == ZC_HKEY_UNDO)
goto continue_input;
if (!handle_hot_key (key))
goto continue_input;
return ZC_BAD;
}
/* Return key */
return key;
}/* stream_read_key */
/*
* stream_read_input
*
* Read a line of input from the current input stream.
*
*/
zchar stream_read_input ( int max, zchar *buf,
zword timeout, zword routine,
bool hot_keys,
bool no_scripting )
{
zchar key = ZC_BAD;
flush_buffer ();
/* Remove initial input from the transscript file or from the screen */
if (ostream_script && enable_scripting && !no_scripting)
script_erase_input (buf);
if (istream_replay)
screen_erase_input (buf);
/* Read input line from current input stream */
continue_input:
do {
if (istream_replay)
key = replay_read_input (buf);
else
key = console_read_input (max, buf, timeout, key != ZC_BAD);
} while (key == ZC_BAD);
/* Verify mouse clicks */
if (key == ZC_SINGLE_CLICK || key == ZC_DOUBLE_CLICK)
if (!validate_click ())
goto continue_input;
/* Copy input line to the command file */
if (ostream_record && !istream_replay)
record_write_input (buf, key);
/* Handle timeouts */
if (key == ZC_TIME_OUT)
if (direct_call (routine) == 0)
goto continue_input;
/* Handle hot keys */
if (hot_keys && key >= ZC_HKEY_MIN && key <= ZC_HKEY_MAX) {
if (!handle_hot_key (key))
goto continue_input;
return ZC_BAD;
}
/* Copy input line to transscript file or to the screen */
if (ostream_script && enable_scripting && !no_scripting)
script_write_input (buf, key);
if (istream_replay)
screen_write_input (buf, key);
/* Return terminating key */
return key;
}/* stream_read_input */
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