Split out configuration file code from m_misc.c into m_config.c. Move

screenshot code into v_video.c Add M_FileLength common function for
finding the length of an open file.

Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 1102

1 files changed, 1050 insertions, 0 deletions

diff --git a/src/m_config.c b/src/m_config.c
new file mode 100644
index 00000000..15ff2fde
--- /dev/null
+++ b/src/m_config.c
@@ -0,0 +1,1050 @@
+// Emacs style mode select   -*- C++ -*- 
+//-----------------------------------------------------------------------------
+//
+// Copyright(C) 1993-1996 Id Software, Inc.
+// Copyright(C) 2005 Simon Howard
+//
+// This program 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.
+//
+// This program 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.
+//
+//
+// DESCRIPTION:
+//    Configuration file interface.
+//
+//-----------------------------------------------------------------------------
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <errno.h>
+
+#include "config.h"
+#include "deh_main.h"
+#include "doomdef.h"
+#include "doomfeatures.h"
+
+#include "z_zone.h"
+
+#include "m_menu.h"
+#include "m_argv.h"
+#include "net_client.h"
+
+#include "w_wad.h"
+
+#include "i_joystick.h"
+#include "i_swap.h"
+#include "i_system.h"
+#include "i_video.h"
+#include "v_video.h"
+
+#include "hu_stuff.h"
+
+// State.
+#include "doomstat.h"
+
+// Data.
+#include "dstrings.h"
+
+#include "m_misc.h"
+
+
+//
+// DEFAULTS
+//
+
+// Location where all configuration data is stored - 
+// default.cfg, savegames, etc.
+
+char *          configdir;
+
+
+int		usemouse = 1;
+int		usejoystick = 0;
+
+extern int	key_right;
+extern int	key_left;
+extern int	key_up;
+extern int	key_down;
+
+extern int	key_strafeleft;
+extern int	key_straferight;
+
+extern int	key_fire;
+extern int	key_use;
+extern int	key_strafe;
+extern int	key_speed;
+
+extern int	mousebfire;
+extern int	mousebstrafe;
+extern int	mousebforward;
+
+extern int      mousebstrafeleft;
+extern int      mousebstraferight;
+extern int      mousebbackward;
+extern int      mousebuse;
+
+extern int      dclick_use;
+
+extern int	joybfire;
+extern int	joybstrafe;
+extern int	joybuse;
+extern int	joybspeed;
+extern int      joybstrafeleft;
+extern int      joybstraferight;
+
+extern int	viewwidth;
+extern int	viewheight;
+
+extern int	mouseSensitivity;
+extern int	showMessages;
+
+// machine-independent sound params
+extern	int	numChannels;
+
+
+extern char*	chat_macros[];
+
+extern int      show_endoom;
+extern int      vanilla_savegame_limit;
+extern int      vanilla_demo_limit;
+
+extern int snd_musicdevice;
+extern int snd_sfxdevice;
+extern int snd_samplerate;
+
+// controls whether to use libsamplerate for sample rate conversions
+
+extern int use_libsamplerate;
+
+// dos specific options: these are unused but should be maintained
+// so that the config file can be shared between chocolate
+// doom and doom.exe
+
+static int snd_sbport = 0;
+static int snd_sbirq = 0;
+static int snd_sbdma = 0;
+static int snd_mport = 0;
+
+typedef enum 
+{
+    DEFAULT_INT,
+    DEFAULT_STRING,
+    DEFAULT_FLOAT,
+    DEFAULT_KEY,
+} default_type_t;
+
+typedef struct
+{
+    // Name of the variable
+    char *         name;
+
+    // Pointer to the location in memory of the variable
+    void *         location;
+
+    // Type of the variable
+    default_type_t type;
+
+    // If this is a key value, the original integer scancode we read from
+    // the config file before translating it to the internal key value.
+    // If zero, we didn't read this value from a config file.
+    int            untranslated;
+
+    // The value we translated the scancode into when we read the 
+    // config file on startup.  If the variable value is different from
+    // this, it has been changed and needs to be converted; otherwise,
+    // use the 'untranslated' value.
+    int            original_translated;
+} default_t;
+
+typedef struct
+{
+    default_t *defaults;
+    int        numdefaults;
+    char      *filename;
+} default_collection_t;
+
+#define CONFIG_VARIABLE_KEY(name, variable) \
+    { #name, &variable, DEFAULT_KEY, 0, 0 }
+#define CONFIG_VARIABLE_INT(name, variable) \
+    { #name, &variable, DEFAULT_INT, 0, 0 }
+#define CONFIG_VARIABLE_FLOAT(name, variable) \
+    { #name, &variable, DEFAULT_FLOAT, 0, 0 }
+#define CONFIG_VARIABLE_STRING(name, variable) \
+    { #name, &variable, DEFAULT_STRING, 0, 0 }
+
+//! @begin_config_file default.cfg
+
+static default_t	doom_defaults_list[] =
+{
+    //! 
+    // Mouse sensitivity.  This value is used to multiply input mouse
+    // movement to control the effect of moving the mouse.
+    //
+    // The "normal" maximum value available for this through the 
+    // in-game options menu is 9. A value of 31 or greater will cause
+    // the game to crash when entering the options menu.
+    //
+
+    CONFIG_VARIABLE_INT(mouse_sensitivity, mouseSensitivity),
+
+    //!
+    // Volume of sound effects, range 0-15.
+    //
+
+    CONFIG_VARIABLE_INT(sfx_volume,        sfxVolume),
+
+    //!
+    // Volume of in-game music, range 0-15.
+    //
+
+    CONFIG_VARIABLE_INT(music_volume,      musicVolume),
+
+    //!
+    // If non-zero, messages are displayed on the heads-up display
+    // in the game ("picked up a clip", etc).  If zero, these messages
+    // are not displayed.
+    //
+
+    CONFIG_VARIABLE_INT(show_messages,     showMessages),
+
+    //! 
+    // Keyboard key to turn right.
+    //
+
+    CONFIG_VARIABLE_KEY(key_right,         key_right),
+
+    //!
+    // Keyboard key to turn left.
+    //
+
+    CONFIG_VARIABLE_KEY(key_left,          key_left),
+
+    //!
+    // Keyboard key to move forward.
+    //
+
+    CONFIG_VARIABLE_KEY(key_up,            key_up),
+
+    //!
+    // Keyboard key to move backward.
+    //
+
+    CONFIG_VARIABLE_KEY(key_down,          key_down),
+
+    //!
+    // Keyboard key to strafe left.
+    //
+
+    CONFIG_VARIABLE_KEY(key_strafeleft,    key_strafeleft),
+
+    //!
+    // Keyboard key to strafe right.
+    //
+
+    CONFIG_VARIABLE_KEY(key_straferight,   key_straferight),
+
+    //!
+    // Keyboard key to fire the currently selected weapon.
+    //
+
+    CONFIG_VARIABLE_KEY(key_fire,          key_fire),
+
+    //!
+    // Keyboard key to "use" an object, eg. a door or switch.
+    //
+
+    CONFIG_VARIABLE_KEY(key_use,           key_use),
+
+    //!
+    // Keyboard key to turn on strafing.  When held down, pressing the
+    // key to turn left or right causes the player to strafe left or
+    // right instead.
+    //
+
+    CONFIG_VARIABLE_KEY(key_strafe,        key_strafe),
+
+    //!
+    // Keyboard key to make the player run.
+    //
+
+    CONFIG_VARIABLE_KEY(key_speed,         key_speed),
+
+    //!
+    // If non-zero, mouse input is enabled.  If zero, mouse input is
+    // disabled.
+    //
+
+    CONFIG_VARIABLE_INT(use_mouse,         usemouse),
+
+    //!
+    // Mouse button to fire the currently selected weapon.
+    //
+
+    CONFIG_VARIABLE_INT(mouseb_fire,       mousebfire),
+
+    //!
+    // Mouse button to turn on strafing.  When held down, the player
+    // will strafe left and right instead of turning left and right.
+    //
+
+    CONFIG_VARIABLE_INT(mouseb_strafe,     mousebstrafe),
+
+    //!
+    // Mouse button to move forward.
+    //
+
+    CONFIG_VARIABLE_INT(mouseb_forward,    mousebforward),
+
+    //!
+    // If non-zero, joystick input is enabled.
+    //
+
+    CONFIG_VARIABLE_INT(use_joystick,      usejoystick),
+
+    //!
+    // Joystick button to fire the current weapon.
+    //
+
+    CONFIG_VARIABLE_INT(joyb_fire,         joybfire),
+
+    //!
+    // Joystick button to fire the current weapon.
+    //
+
+    CONFIG_VARIABLE_INT(joyb_strafe,       joybstrafe),
+
+    //!
+    // Joystick button to "use" an object, eg. a door or switch.
+    //
+
+    CONFIG_VARIABLE_INT(joyb_use,          joybuse),
+
+    //!
+    // Joystick button to make the player run.
+    //
+    // If this has a value of 20 or greater, the player will always run.
+    //
+
+    CONFIG_VARIABLE_INT(joyb_speed,        joybspeed),
+
+    //!
+    // Screen size, range 3-11.
+    //
+    // A value of 11 gives a full-screen view with the status bar not 
+    // displayed.  A value of 10 gives a full-screen view with the
+    // status bar displayed.
+    //
+
+    CONFIG_VARIABLE_INT(screenblocks,      screenblocks),
+
+    //!
+    // Screen detail.  Zero gives normal "high detail" mode, while
+    // a non-zero value gives "low detail" mode.
+    //
+
+    CONFIG_VARIABLE_INT(detaillevel,       detailLevel),
+
+    //!
+    // Number of sounds that will be played simultaneously.
+    //
+
+    CONFIG_VARIABLE_INT(snd_channels,      numChannels),
+
+    //!
+    // Music output device.  A non-zero value gives MIDI sound output,
+    // while a value of zero disables music.
+    //
+
+    CONFIG_VARIABLE_INT(snd_musicdevice,   snd_musicdevice),
+
+    //!
+    // Sound effects device.  A value of zero disables in-game sound 
+    // effects, a value of 1 enables PC speaker sound effects, while 
+    // a value in the range 2-9 enables the "normal" digital sound 
+    // effects.
+    //
+
+    CONFIG_VARIABLE_INT(snd_sfxdevice,     snd_sfxdevice),
+
+    //!
+    // SoundBlaster I/O port. Unused.
+    //
+
+    CONFIG_VARIABLE_INT(snd_sbport,        snd_sbport),
+
+    //!
+    // SoundBlaster IRQ.  Unused.
+    //
+
+    CONFIG_VARIABLE_INT(snd_sbirq,         snd_sbirq),
+
+    //!
+    // SoundBlaster DMA channel.  Unused.
+    //
+
+    CONFIG_VARIABLE_INT(snd_sbdma,         snd_sbdma),
+
+    //!
+    // Output port to use for OPL MIDI playback.  Unused.
+    //
+
+    CONFIG_VARIABLE_INT(snd_mport,         snd_mport),
+
+    //!
+    // Gamma correction level.  A value of zero disables gamma 
+    // correction, while a value in the range 1-4 gives increasing
+    // levels of gamma correction.
+    //
+
+    CONFIG_VARIABLE_INT(usegamma,          usegamma),
+
+    //!
+    // Multiplayer chat macro: message to send when alt+0 is pressed.
+    //
+
+    CONFIG_VARIABLE_STRING(chatmacro0,     chat_macros[0]),
+
+    //!
+    // Multiplayer chat macro: message to send when alt+1 is pressed.
+    //
+
+    CONFIG_VARIABLE_STRING(chatmacro1,     chat_macros[1]),
+
+    //!
+    // Multiplayer chat macro: message to send when alt+2 is pressed.
+    //
+
+    CONFIG_VARIABLE_STRING(chatmacro2,     chat_macros[2]),
+
+    //!
+    // Multiplayer chat macro: message to send when alt+3 is pressed.
+    //
+
+    CONFIG_VARIABLE_STRING(chatmacro3,     chat_macros[3]),
+
+    //!
+    // Multiplayer chat macro: message to send when alt+4 is pressed.
+    //
+
+    CONFIG_VARIABLE_STRING(chatmacro4,     chat_macros[4]),
+
+    //!
+    // Multiplayer chat macro: message to send when alt+5 is pressed.
+    //
+
+    CONFIG_VARIABLE_STRING(chatmacro5,     chat_macros[5]),
+
+    //!
+    // Multiplayer chat macro: message to send when alt+6 is pressed.
+    //
+
+    CONFIG_VARIABLE_STRING(chatmacro6,     chat_macros[6]),
+
+    //!
+    // Multiplayer chat macro: message to send when alt+7 is pressed.
+    //
+
+    CONFIG_VARIABLE_STRING(chatmacro7,     chat_macros[7]),
+
+    //!
+    // Multiplayer chat macro: message to send when alt+8 is pressed.
+    //
+
+    CONFIG_VARIABLE_STRING(chatmacro8,     chat_macros[8]),
+
+    //!
+    // Multiplayer chat macro: message to send when alt+9 is pressed.
+    //
+
+    CONFIG_VARIABLE_STRING(chatmacro9,     chat_macros[9]),
+};
+
+static default_collection_t doom_defaults = 
+{
+    doom_defaults_list,
+    arrlen(doom_defaults_list),
+    NULL,
+};
+
+//! @begin_config_file chocolate-doom.cfg
+
+static default_t extra_defaults_list[] = 
+{
+    //!
+    // If non-zero, video settings will be autoadjusted to a valid 
+    // configuration when the screen_width and screen_height variables
+    // do not match any valid configuration.
+    //
+
+    CONFIG_VARIABLE_INT(autoadjust_video_settings, autoadjust_video_settings),
+
+    //!
+    // If non-zero, the game will run in full screen mode.  If zero,
+    // the game will run in a window.
+    //
+
+    CONFIG_VARIABLE_INT(fullscreen,                fullscreen),
+
+    //!
+    // If non-zero, the screen will be stretched vertically to display
+    // correctly on a square pixel video mode.
+    //
+
+    CONFIG_VARIABLE_INT(aspect_ratio_correct,      aspect_ratio_correct),
+
+    //!
+    // Number of milliseconds to wait on startup after the video mode
+    // has been set, before the game will start.  This allows the 
+    // screen to settle on some monitors that do not display an image 
+    // for a brief interval after changing video modes.
+    //
+
+    CONFIG_VARIABLE_INT(startup_delay,             startup_delay),
+
+    //!
+    // Screen width in pixels.  If running in full screen mode, this is
+    // the X dimension of the video mode to use.  If running in
+    // windowed mode, this is the width of the window in which the game
+    // will run.
+    //
+
+    CONFIG_VARIABLE_INT(screen_width,              screen_width),
+
+    //!
+    // Screen height in pixels.  If running in full screen mode, this is
+    // the Y dimension of the video mode to use.  If running in
+    // windowed mode, this is the height of the window in which the game
+    // will run.
+    //
+
+    CONFIG_VARIABLE_INT(screen_height,             screen_height),
+
+    //!
+    // If this is non-zero, the mouse will be "grabbed" when running
+    // in windowed mode so that it can be used as an input device.
+    // When running full screen, this has no effect.
+    //
+
+    CONFIG_VARIABLE_INT(grabmouse,                 grabmouse),
+
+    //!
+    // If non-zero, all vertical mouse movement is ignored.  This 
+    // emulates the behavior of the "novert" tool available under DOS
+    // that performs the same function.
+    //
+
+    CONFIG_VARIABLE_INT(novert,                    novert),
+
+    //!
+    // Mouse acceleration factor.  When the speed of mouse movement
+    // exceeds the threshold value (mouse_threshold), the speed is
+    // multiplied by this value.
+    //
+
+    CONFIG_VARIABLE_FLOAT(mouse_acceleration,      mouse_acceleration),
+
+    //!
+    // Mouse acceleration threshold.  When the speed of mouse movement
+    // exceeds this threshold value, the speed is multiplied by an 
+    // acceleration factor (mouse_acceleration).
+    //
+
+    CONFIG_VARIABLE_INT(mouse_threshold,           mouse_threshold),
+
+    //!
+    // Sound output sample rate, in Hz.  Typical values to use are 
+    // 11025, 22050, 44100 and 48000.
+    //
+
+    CONFIG_VARIABLE_INT(snd_samplerate,            snd_samplerate),
+
+    //!
+    // If non-zero, the ENDOOM screen is displayed when exiting the
+    // game.  If zero, the ENDOOM screen is not displayed.
+    //
+
+    CONFIG_VARIABLE_INT(show_endoom,               show_endoom),
+
+    //!
+    // If non-zero, the Vanilla savegame limit is enforced; if the 
+    // savegame exceeds 180224 bytes in size, the game will exit with
+    // an error.  If this has a value of zero, there is no limit to
+    // the size of savegames.
+    //
+
+    CONFIG_VARIABLE_INT(vanilla_savegame_limit,    vanilla_savegame_limit),
+
+    //!
+    // If non-zero, the Vanilla demo size limit is enforced; the game 
+    // exits with an error when a demo exceeds the demo size limit
+    // (128KiB by default).  If this has a value of zero, there is no
+    // limit to the size of demos.
+    //
+
+    CONFIG_VARIABLE_INT(vanilla_demo_limit,        vanilla_demo_limit),
+
+    //!
+    // If non-zero, the game behaves like Vanilla Doom, always assuming
+    // an American keyboard mapping.  If this has a value of zero, the 
+    // native keyboard mapping of the keyboard is used.
+    //
+
+    CONFIG_VARIABLE_INT(vanilla_keyboard_mapping,  vanilla_keyboard_mapping),
+
+    //!
+    // Name of the SDL video driver to use.  If this is an empty string,
+    // the default video driver is used.
+    //
+
+    CONFIG_VARIABLE_STRING(video_driver,           video_driver),
+
+#ifdef FEATURE_MULTIPLAYER
+
+    //!
+    // Name to use in network games for identification.  This is only 
+    // used on the "waiting" screen while waiting for the game to start.
+    //
+
+    CONFIG_VARIABLE_STRING(player_name,            net_player_name),
+
+#endif
+
+    //!
+    // Joystick number to use; '0' is the first joystick.  A negative
+    // value ('-1') indicates that no joystick is configured.
+    //
+
+    CONFIG_VARIABLE_INT(joystick_index,            joystick_index),
+
+    //!
+    // Joystick axis to use to for horizontal (X) movement.
+    //
+
+    CONFIG_VARIABLE_INT(joystick_x_axis,           joystick_x_axis),
+
+    //!
+    // If non-zero, movement on the horizontal joystick axis is inverted.
+    //
+
+    CONFIG_VARIABLE_INT(joystick_x_invert,         joystick_x_invert),
+
+    //!
+    // Joystick axis to use to for vertical (Y) movement.
+    //
+
+    CONFIG_VARIABLE_INT(joystick_y_axis,           joystick_y_axis),
+
+    //!
+    // If non-zero, movement on the vertical joystick axis is inverted.
+    //
+
+    CONFIG_VARIABLE_INT(joystick_y_invert,         joystick_y_invert),
+
+    //!
+    // Joystick button to strafe left.
+    //
+
+    CONFIG_VARIABLE_INT(joyb_strafeleft,           joybstrafeleft),
+
+    //!
+    // Joystick button to strafe right.
+    //
+
+    CONFIG_VARIABLE_INT(joyb_straferight,          joybstraferight),
+
+    //!
+    // Mouse button to strafe left.
+    //
+
+    CONFIG_VARIABLE_INT(mouseb_strafeleft,         mousebstrafeleft),
+
+    //!
+    // Mouse button to strafe right.
+    //
+
+    CONFIG_VARIABLE_INT(mouseb_straferight,        mousebstraferight),
+
+    //!
+    // Mouse button to "use" an object, eg. a door or switch.
+    //
+
+    CONFIG_VARIABLE_INT(mouseb_use,                mousebuse),
+
+    //!
+    // Mouse button to move backwards.
+    //
+
+    CONFIG_VARIABLE_INT(mouseb_backward,           mousebbackward),
+
+    //!
+    // If non-zero, double-clicking a mouse button acts like pressing
+    // the "use" key to use an object in-game, eg. a door or switch.
+    //
+
+    CONFIG_VARIABLE_INT(dclick_use,                dclick_use),
+
+    //!
+    // If non-zero, libsamplerate is used to resample sound effects to
+    // the output sample rate.  This has no effect if libsamplerate
+    // support has not been compiled into the game.
+    //
+
+    CONFIG_VARIABLE_INT(use_libsamplerate,         use_libsamplerate),
+};
+
+static default_collection_t extra_defaults =
+{
+    extra_defaults_list,
+    arrlen(extra_defaults_list),
+    NULL,
+};
+
+static const int scantokey[128] =
+{
+    0  ,    27,     '1',    '2',    '3',    '4',    '5',    '6',
+    '7',    '8',    '9',    '0',    '-',    '=',    KEY_BACKSPACE, 9,
+    'q',    'w',    'e',    'r',    't',    'y',    'u',    'i',
+    'o',    'p',    '[',    ']',    13,		KEY_RCTRL, 'a',    's',
+    'd',    'f',    'g',    'h',    'j',    'k',    'l',    ';',
+    '\'',   '`',    KEY_RSHIFT,'\\',   'z',    'x',    'c',    'v',
+    'b',    'n',    'm',    ',',    '.',    '/',    KEY_RSHIFT,KEYP_MULTIPLY,
+    KEY_RALT,  ' ',  KEY_CAPSLOCK,KEY_F1,  KEY_F2,   KEY_F3,   KEY_F4,   KEY_F5,
+    KEY_F6,   KEY_F7,   KEY_F8,   KEY_F9,   KEY_F10,  KEY_PAUSE,KEY_SCRLCK,KEY_HOME,
+    KEY_UPARROW,KEY_PGUP,KEY_MINUS,KEY_LEFTARROW,KEYP_5,KEY_RIGHTARROW,KEYP_PLUS,KEY_END,
+    KEY_DOWNARROW,KEY_PGDN,KEY_INS,KEY_DEL,0,   0,      0,      KEY_F11,
+    KEY_F12,  0,      0,      0,      0,      0,      0,      0,
+    0,      0,      0,      0,      0,      0,      0,      0,
+    0,      0,      0,      0,      0,      0,      0,      0,
+    0,      0,      0,      0,      0,      0,      0,      0,
+    0,      0,      0,      0,      0,      0,      0,      0
+};
+
+
+static void SaveDefaultCollection(default_collection_t *collection)
+{
+    default_t *defaults;
+    int i, v;
+    FILE *f;
+	
+    f = fopen (collection->filename, "w");
+    if (!f)
+	return; // can't write the file, but don't complain
+
+    defaults = collection->defaults;
+		
+    for (i=0 ; i<collection->numdefaults ; i++)
+    {
+        int chars_written;
+
+        // Print the name and line up all values at 30 characters
+
+        chars_written = fprintf(f, "%s ", defaults[i].name);
+
+        for (; chars_written < 30; ++chars_written)
+            fprintf(f, " ");
+
+        // Print the value
+
+        switch (defaults[i].type) 
+        {
+            case DEFAULT_KEY:
+
+                // use the untranslated version if we can, to reduce
+                // the possibility of screwing up the user's config
+                // file
+                
+                v = * (int *) defaults[i].location;
+
+                if (defaults[i].untranslated
+                 && v == defaults[i].original_translated)
+                {
+                    // Has not been changed since the last time we
+                    // read the config file.
+
+                    v = defaults[i].untranslated;
+                }
+                else
+                {
+                    // search for a reverse mapping back to a scancode
+                    // in the scantokey table
+
+                    int s;
+
+                    for (s=0; s<128; ++s)
+                    {
+                        if (scantokey[s] == v)
+                        {
+                            v = s;
+                            break;
+                        }
+                    }
+                }
+
+	        fprintf(f, "%i", v);
+                break;
+
+            case DEFAULT_INT:
+	        fprintf(f, "%i", * (int *) defaults[i].location);
+                break;
+
+            case DEFAULT_FLOAT:
+                fprintf(f, "%f", * (float *) defaults[i].location);
+                break;
+
+            case DEFAULT_STRING:
+	        fprintf(f,"\"%s\"", * (char **) (defaults[i].location));
+                break;
+        }
+
+        fprintf(f, "\n");
+    }
+
+    fclose (f);
+}
+
+// Parses integer values in the configuration file
+
+static int ParseIntParameter(char *strparm)
+{
+    int parm;
+
+    if (strparm[0] == '0' && strparm[1] == 'x')
+        sscanf(strparm+2, "%x", &parm);
+    else
+        sscanf(strparm, "%i", &parm);
+
+    return parm;
+}
+
+static void LoadDefaultCollection(default_collection_t *collection)
+{
+    default_t  *defaults = collection->defaults;
+    int		i;
+    FILE*	f;
+    char	defname[80];
+    char	strparm[100];
+
+    // read the file in, overriding any set defaults
+    f = fopen(collection->filename, "r");
+
+    if (!f)
+    {
+        // File not opened, but don't complain
+
+        return;
+    }
+    
+    while (!feof(f))
+    {
+        if (fscanf (f, "%79s %[^\n]\n", defname, strparm) != 2)
+        {
+            // This line doesn't match
+          
+            continue;
+        }
+
+        // Strip off trailing non-printable characters (\r characters
+        // from DOS text files)
+
+        while (strlen(strparm) > 0 && !isprint(strparm[strlen(strparm)-1]))
+        {
+            strparm[strlen(strparm)-1] = '\0';
+        }
+        
+        // Find the setting in the list
+       
+        for (i=0; i<collection->numdefaults; ++i)
+        {
+            default_t *def = &collection->defaults[i];
+            char *s;
+            int intparm;
+
+            if (strcmp(defname, def->name) != 0)
+            {
+                // not this one
+                continue;
+            }
+
+            // parameter found
+
+            switch (def->type)
+            {
+                case DEFAULT_STRING:
+                    s = strdup(strparm + 1);
+                    s[strlen(s) - 1] = '\0';
+                    * (char **) def->location = s;
+                    break;
+
+                case DEFAULT_INT:
+                    * (int *) def->location = ParseIntParameter(strparm);
+                    break;
+
+                case DEFAULT_KEY:
+
+                    // translate scancodes read from config
+                    // file (save the old value in untranslated)
+
+                    intparm = ParseIntParameter(strparm);
+                    defaults[i].untranslated = intparm;
+                    intparm = scantokey[intparm];
+
+                    defaults[i].original_translated = intparm;
+                    * (int *) def->location = intparm;
+                    break;
+
+                case DEFAULT_FLOAT:
+                    * (float *) def->location = (float) atof(strparm);
+                    break;
+            }
+
+            // finish
+
+            break; 
+        }
+    }
+            
+    fclose (f);
+}
+
+//
+// M_SaveDefaults
+//
+
+void M_SaveDefaults (void)
+{
+    SaveDefaultCollection(&doom_defaults);
+    SaveDefaultCollection(&extra_defaults);
+}
+
+
+//
+// M_LoadDefaults
+//
+
+void M_LoadDefaults (void)
+{
+    int i;
+ 
+    // check for a custom default file
+
+    //!
+    // @arg <file>
+    // @vanilla
+    //
+    // Load configuration from the specified file, instead of
+    // default.cfg.
+    //
+
+    i = M_CheckParm ("-config");
+
+    if (i && i<myargc-1)
+    {
+	doom_defaults.filename = myargv[i+1];
+	printf ("	default file: %s\n",doom_defaults.filename);
+    }
+    else
+    {
+        doom_defaults.filename = malloc(strlen(configdir) + 20);
+        sprintf(doom_defaults.filename, "%sdefault.cfg", configdir);
+    }
+
+    printf("saving config in %s\n", doom_defaults.filename);
+
+    //!
+    // @arg <file>
+    //
+    // Load extra configuration from the specified file, instead 
+    // of chocolate-doom.cfg.
+    //
+
+    i = M_CheckParm("-extraconfig");
+
+    if (i && i<myargc-1)
+    {
+        extra_defaults.filename = myargv[i+1];
+        printf("        extra configuration file: %s\n", 
+               extra_defaults.filename);
+    }
+    else
+    {
+        extra_defaults.filename 
+            = malloc(strlen(configdir) + strlen(PACKAGE_TARNAME) + 10);
+        sprintf(extra_defaults.filename, "%s%s.cfg", 
+                configdir, PACKAGE_TARNAME);
+    }
+
+    LoadDefaultCollection(&doom_defaults);
+    LoadDefaultCollection(&extra_defaults);
+}
+
+// 
+// SetConfigDir:
+//
+// Sets the location of the configuration directory, where configuration
+// files are stored - default.cfg, chocolate-doom.cfg, savegames, etc.
+//
+
+void M_SetConfigDir(void)
+{
+#ifndef _WIN32
+    // Ignore the HOME environment variable on Windows - just behave
+    // like Vanilla Doom.
+
+    char *homedir;
+
+    homedir = getenv("HOME");
+
+    if (homedir != NULL)
+    {
+        // put all configuration in a config directory off the
+        // homedir
+
+        configdir = malloc(strlen(homedir) + strlen(PACKAGE_TARNAME) + 5);
+
+        sprintf(configdir, "%s%c.%s%c", homedir, DIR_SEPARATOR,
+			                PACKAGE_TARNAME, DIR_SEPARATOR);
+
+        // make the directory if it doesnt already exist
+
+        M_MakeDirectory(configdir);
+    }
+    else
+#endif /* #ifndef _WIN32 */
+    {
+#ifdef _WIN32
+        //!
+        // @platform windows
+        // @vanilla
+        //
+        // Save configuration data and savegames in c:\doomdata,
+        // allowing play from CD.
+        //
+
+        if (M_CheckParm("-cdrom") > 0)
+        {
+            printf(D_CDROM);
+            configdir = strdup("c:\\doomdata\\");
+
+            M_MakeDirectory(configdir);
+        }
+        else
+#endif
+        {
+            configdir = strdup("");
+        }
+    }
+}
+