diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/joystick/os2/SDL_sysjoystick.c')
| -rw-r--r-- | distrib/sdl-1.2.12/src/joystick/os2/SDL_sysjoystick.c | 668 |
1 files changed, 0 insertions, 668 deletions
diff --git a/distrib/sdl-1.2.12/src/joystick/os2/SDL_sysjoystick.c b/distrib/sdl-1.2.12/src/joystick/os2/SDL_sysjoystick.c deleted file mode 100644 index 15dca4e..0000000 --- a/distrib/sdl-1.2.12/src/joystick/os2/SDL_sysjoystick.c +++ /dev/null @@ -1,668 +0,0 @@ -/* - SDL - Simple DirectMedia Layer - Copyright (C) 1997-2006 Sam Lantinga - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - This library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with this library; if not, write to the Free Software - Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - - Sam Lantinga - slouken@libsdl.org -*/ -#include "SDL_config.h" - -#ifdef SDL_JOYSTICK_OS2 - -/* OS/2 Joystick driver, contributed by Daniel Caetano */ - -#include <mem.h> - -#define INCL_DOSDEVICES -#define INCL_DOSDEVIOCTL -#define INCL_DOSMEMMGR -#include <os2.h> -#include "joyos2.h" - -#include "SDL_joystick.h" -#include "SDL_events.h" -#include "../SDL_sysjoystick.h" -#include "../SDL_joystick_c.h" - -HFILE hJoyPort = NULL; /* Joystick GAME$ Port Address */ -#define MAX_JOYSTICKS 2 /* Maximum of two joysticks */ -#define MAX_AXES 4 /* each joystick can have up to 4 axes */ -#define MAX_BUTTONS 8 /* 8 buttons */ -#define MAX_HATS 0 /* 0 hats - OS/2 doesn't support it */ -#define MAX_BALLS 0 /* and 0 balls - OS/2 doesn't support it */ -#define AXIS_MIN -32768 /* minimum value for axes coordinate */ -#define AXIS_MAX 32767 /* maximum value for axes coordinate */ -#define MAX_JOYNAME 128 /* Joystick name may have 128 characters */ -/* limit axes to 256 possible positions to filter out noise */ -#define JOY_AXIS_THRESHOLD (((AXIS_MAX)-(AXIS_MIN))/256) -/* Calc Button Flag for buttons A to D */ -#define JOY_BUTTON_FLAG(n) (1<<n) - -/* Joystick data... hold information about detected devices */ -typedef struct SYS_JoyData_s -{ -Sint8 id; // Device ID -char szDeviceName[MAX_JOYNAME]; // Device Name -char axes; // Number of axes -char buttons; // Number of buttons -char hats; // Number of buttons -char balls; // Number of buttons -int axes_min[MAX_AXES]; // minimum callibration value for axes -int axes_med[MAX_AXES]; // medium callibration value for axes -int axes_max[MAX_AXES]; // maximum callibration value for axes -int buttoncalc[4]; // Used for buttons 5, 6, 7 and 8. -} SYS_JoyData_t, *SYS_JoyData_p; - -SYS_JoyData_t SYS_JoyData[MAX_JOYSTICKS]; - - -/* Structure used to convert data from OS/2 driver format to SDL format */ -struct joystick_hwdata -{ -Sint8 id; -struct _transaxes - { - int offset; /* Center Offset */ - float scale1; /* Center to left/up Scale */ - float scale2; /* Center to right/down Scale */ - } transaxes[MAX_AXES]; -}; - -/* Structure used to get values from Joystick Environment Variable */ -struct _joycfg -{ -char name[MAX_JOYNAME]; -unsigned int axes; -unsigned int buttons; -unsigned int hats; -unsigned int balls; -}; - -/* OS/2 Implementation Function Prototypes */ -APIRET joyPortOpen(HFILE * hGame); -void joyPortClose(HFILE * hGame); -int joyGetData(char *joyenv, char *name, char stopchar, size_t maxchars); -int joyGetEnv(struct _joycfg * joydata); - - - -/************************************************************************/ -/* Function to scan the system for joysticks. */ -/* This function should set SDL_numjoysticks to the number of available */ -/* joysticks. Joystick 0 should be the system default joystick. */ -/* It should return 0, or -1 on an unrecoverable fatal error. */ -/************************************************************************/ -int SDL_SYS_JoystickInit(void) -{ -APIRET rc; /* Generic OS/2 return code */ -GAME_PORT_STRUCT stJoyStatus; /* Joystick Status Structure */ -GAME_PARM_STRUCT stGameParms; /* Joystick Parameter Structure */ -GAME_CALIB_STRUCT stGameCalib; /* Calibration Struct */ -ULONG ulDataLen; /* Size of data */ -ULONG ulLastTick; /* Tick Counter for timing operations */ -Uint8 maxdevs; /* Maximum number of devices */ -Uint8 numdevs; /* Number of present devices */ -Uint8 maxbut; /* Maximum number of buttons... */ -Uint8 i; /* Temporary Count Vars */ -Uint8 ucNewJoystickMask; /* Mask for Joystick Detection */ -struct _joycfg joycfg; /* Joy Configuration from envvar */ - - -/* Get Max Number of Devices */ -rc = joyPortOpen(&hJoyPort); /* Open GAME$ port */ -if (rc != 0) return 0; /* Cannot open... report no joystick */ -ulDataLen = sizeof(stGameParms); -rc = DosDevIOCtl(hJoyPort, IOCTL_CAT_USER, GAME_GET_PARMS, - NULL, 0, NULL, &stGameParms, ulDataLen, &ulDataLen); /* Ask device info */ -if (rc != 0) - { - joyPortClose(&hJoyPort); - SDL_SetError("Could not read joystick port."); - return -1; - } -if (stGameParms.useA != 0) maxdevs++; -if (stGameParms.useB != 0) maxdevs++; -if ( maxdevs > MAX_JOYSTICKS ) maxdevs = MAX_JOYSTICKS; - -/* Defines min/max axes values (callibration) */ -ulDataLen = sizeof(stGameCalib); -rc = DosDevIOCtl(hJoyPort, IOCTL_CAT_USER, GAME_GET_CALIB, - NULL, 0, NULL, &stGameCalib, ulDataLen, &ulDataLen); -if (rc != 0) - { - joyPortClose(&hJoyPort); - SDL_SetError("Could not read callibration data."); - return -1; - } - -/* Determine how many joysticks are active */ -numdevs = 0; /* Points no device */ -ucNewJoystickMask = 0x0F; /* read all 4 joystick axis */ -ulDataLen = sizeof(ucNewJoystickMask); -rc = DosDevIOCtl(hJoyPort, IOCTL_CAT_USER, GAME_PORT_RESET, - &ucNewJoystickMask, ulDataLen, &ulDataLen, NULL, 0, NULL); -if (rc == 0) - { - ulDataLen = sizeof(stJoyStatus); - rc = DosDevIOCtl(hJoyPort, IOCTL_CAT_USER, GAME_PORT_GET, - NULL, 0, NULL, &stJoyStatus, ulDataLen, &ulDataLen); - if (rc != 0) - { - joyPortClose(&hJoyPort); - SDL_SetError("Could not call joystick port."); - return -1; - } - ulLastTick = stJoyStatus.ulJs_Ticks; - while (stJoyStatus.ulJs_Ticks == ulLastTick) - { - rc = DosDevIOCtl(hJoyPort, IOCTL_CAT_USER, GAME_PORT_GET, - NULL, 0, NULL, &stJoyStatus, ulDataLen, &ulDataLen); - } - if ((stJoyStatus.ucJs_JoyStickMask & 0x03) > 0) numdevs++; - if (((stJoyStatus.ucJs_JoyStickMask >> 2) & 0x03) > 0) numdevs++; - } - -if (numdevs>maxdevs) numdevs=maxdevs; - -/* If *any* joystick was detected... Let's configure SDL for them */ -if (numdevs > 0) - { - /* Verify if it is a "user defined" joystick */ - if (joyGetEnv(&joycfg)) - { - GAME_3POS_STRUCT * axis[4]; - axis[0] = &stGameCalib.Ax; - axis[1] = &stGameCalib.Ay; - axis[2] = &stGameCalib.Bx; - axis[3] = &stGameCalib.By; - /* Say it has one device only (user defined is always one device only) */ - numdevs = 1; - /* Define Device 0 as... */ - SYS_JoyData[0].id=0; - /* Define Number of Axes... up to 4 */ - if (joycfg.axes>MAX_AXES) joycfg.axes = MAX_AXES; - SYS_JoyData[0].axes = joycfg.axes; - /* Define number of buttons... 8 if 2 axes, 6 if 3 axes and 4 if 4 axes */ - maxbut = MAX_BUTTONS; - if (joycfg.axes>2) maxbut-=((joycfg.axes-2)<<1); /* MAX_BUTTONS - 2*(axes-2) */ - if (joycfg.buttons > maxbut) joycfg.buttons = maxbut; - SYS_JoyData[0].buttons = joycfg.buttons; - /* Define number of hats */ - if (joycfg.hats > MAX_HATS) joycfg.hats = MAX_HATS; - SYS_JoyData[0].hats = joycfg.hats; - /* Define number of balls */ - if (joycfg.balls > MAX_BALLS) joycfg.balls = MAX_BALLS; - SYS_JoyData[0].balls = joycfg.balls; - /* Initialize Axes Callibration Values */ - for (i=0; i<joycfg.axes; i++) - { - SYS_JoyData[0].axes_min[i] = axis[i]->lower; - SYS_JoyData[0].axes_med[i] = axis[i]->centre; - SYS_JoyData[0].axes_max[i] = axis[i]->upper; - } - /* Initialize Buttons 5 to 8 structures */ - if (joycfg.buttons>=5) SYS_JoyData[0].buttoncalc[0]=((axis[2]->lower+axis[3]->centre)>>1); - if (joycfg.buttons>=6) SYS_JoyData[0].buttoncalc[1]=((axis[3]->lower+axis[3]->centre)>>1); - if (joycfg.buttons>=7) SYS_JoyData[0].buttoncalc[2]=((axis[2]->upper+axis[3]->centre)>>1); - if (joycfg.buttons>=8) SYS_JoyData[0].buttoncalc[3]=((axis[3]->upper+axis[3]->centre)>>1); - /* Intialize Joystick Name */ - SDL_strlcpy (SYS_JoyData[0].szDeviceName,joycfg.name, SDL_arraysize(SYS_JoyData[0].szDeviceName)); - } - /* Default Init ... autoconfig */ - else - { - /* if two devices were detected... configure as Joy1 4 axis and Joy2 2 axis */ - if (numdevs==2) - { - /* Define Device 0 as 4 axes, 4 buttons */ - SYS_JoyData[0].id=0; - SYS_JoyData[0].axes = 4; - SYS_JoyData[0].buttons = 4; - SYS_JoyData[0].hats = 0; - SYS_JoyData[0].balls = 0; - SYS_JoyData[0].axes_min[0] = stGameCalib.Ax.lower; - SYS_JoyData[0].axes_med[0] = stGameCalib.Ax.centre; - SYS_JoyData[0].axes_max[0] = stGameCalib.Ax.upper; - SYS_JoyData[0].axes_min[1] = stGameCalib.Ay.lower; - SYS_JoyData[0].axes_med[1] = stGameCalib.Ay.centre; - SYS_JoyData[0].axes_max[1] = stGameCalib.Ay.upper; - SYS_JoyData[0].axes_min[2] = stGameCalib.Bx.lower; - SYS_JoyData[0].axes_med[2] = stGameCalib.Bx.centre; - SYS_JoyData[0].axes_max[2] = stGameCalib.Bx.upper; - SYS_JoyData[0].axes_min[3] = stGameCalib.By.lower; - SYS_JoyData[0].axes_med[3] = stGameCalib.By.centre; - SYS_JoyData[0].axes_max[3] = stGameCalib.By.upper; - /* Define Device 1 as 2 axes, 2 buttons */ - SYS_JoyData[1].id=1; - SYS_JoyData[1].axes = 2; - SYS_JoyData[1].buttons = 2; - SYS_JoyData[1].hats = 0; - SYS_JoyData[1].balls = 0; - SYS_JoyData[1].axes_min[0] = stGameCalib.Bx.lower; - SYS_JoyData[1].axes_med[0] = stGameCalib.Bx.centre; - SYS_JoyData[1].axes_max[0] = stGameCalib.Bx.upper; - SYS_JoyData[1].axes_min[1] = stGameCalib.By.lower; - SYS_JoyData[1].axes_med[1] = stGameCalib.By.centre; - SYS_JoyData[1].axes_max[1] = stGameCalib.By.upper; - } - /* One joystick only? */ - else - { - /* If it is joystick A... */ - if ((stJoyStatus.ucJs_JoyStickMask & 0x03) > 0) - { - /* Define Device 0 as 2 axes, 4 buttons */ - SYS_JoyData[0].id=0; - SYS_JoyData[0].axes = 2; - SYS_JoyData[0].buttons = 4; - SYS_JoyData[0].hats = 0; - SYS_JoyData[0].balls = 0; - SYS_JoyData[0].axes_min[0] = stGameCalib.Ax.lower; - SYS_JoyData[0].axes_med[0] = stGameCalib.Ax.centre; - SYS_JoyData[0].axes_max[0] = stGameCalib.Ax.upper; - SYS_JoyData[0].axes_min[1] = stGameCalib.Ay.lower; - SYS_JoyData[0].axes_med[1] = stGameCalib.Ay.centre; - SYS_JoyData[0].axes_max[1] = stGameCalib.Ay.upper; - } - /* If not, it is joystick B */ - else - { - /* Define Device 1 as 2 axes, 2 buttons */ - SYS_JoyData[0].id=1; - SYS_JoyData[0].axes = 2; - SYS_JoyData[0].buttons = 2; - SYS_JoyData[0].hats = 0; - SYS_JoyData[0].balls = 0; - SYS_JoyData[0].axes_min[0] = stGameCalib.Bx.lower; - SYS_JoyData[0].axes_med[0] = stGameCalib.Bx.centre; - SYS_JoyData[0].axes_max[0] = stGameCalib.Bx.upper; - SYS_JoyData[0].axes_min[1] = stGameCalib.By.lower; - SYS_JoyData[0].axes_med[1] = stGameCalib.By.centre; - SYS_JoyData[0].axes_max[1] = stGameCalib.By.upper; - } - } - /* Hack to define Joystick Port Names */ - if ( numdevs > maxdevs ) numdevs = maxdevs; - for (i=0; i<numdevs; i++) - SDL_snprintf (SYS_JoyData[i].szDeviceName, SDL_arraysize(SYS_JoyData[i].szDeviceName), "Default Joystick %c", 'A'+SYS_JoyData[i].id); - - } - } -/* Return the number of devices found */ -return(numdevs); -} - - -/***********************************************************/ -/* Function to get the device-dependent name of a joystick */ -/***********************************************************/ -const char *SDL_SYS_JoystickName(int index) -{ -/* No need to verify if device exists, already done in upper layer */ -return(SYS_JoyData[index].szDeviceName); -} - - - -/******************************************************************************/ -/* Function to open a joystick for use. */ -/* The joystick to open is specified by the index field of the joystick. */ -/* This should fill the nbuttons and naxes fields of the joystick structure. */ -/* It returns 0, or -1 if there is an error. */ -/******************************************************************************/ -int SDL_SYS_JoystickOpen(SDL_Joystick *joystick) -{ -int index; /* Index shortcut for index in joystick structure */ -int i; /* Generic Counter */ - -/* allocate memory for system specific hardware data */ -joystick->hwdata = (struct joystick_hwdata *) SDL_malloc(sizeof(*joystick->hwdata)); -if (joystick->hwdata == NULL) - { - SDL_OutOfMemory(); - return(-1); - } -/* Reset Hardware Data */ -SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata)); - -/* ShortCut Pointer */ -index = joystick->index; -/* Define offsets and scales for all axes */ -joystick->hwdata->id = SYS_JoyData[index].id; -for ( i = 0; i < MAX_AXES; ++i ) - { - if ( (i<2) || i < SYS_JoyData[index].axes ) - { - joystick->hwdata->transaxes[i].offset = ((AXIS_MAX + AXIS_MIN)>>1) - SYS_JoyData[index].axes_med[i]; - //joystick->hwdata->transaxes[i].scale = (float)((AXIS_MAX - AXIS_MIN)/(SYS_JoyData[index].axes_max[i]-SYS_JoyData[index].axes_min[i])); - joystick->hwdata->transaxes[i].scale1 = (float)abs((AXIS_MIN/SYS_JoyData[index].axes_min[i])); - joystick->hwdata->transaxes[i].scale2 = (float)abs((AXIS_MAX/SYS_JoyData[index].axes_max[i])); - } - else - { - joystick->hwdata->transaxes[i].offset = 0; - //joystick->hwdata->transaxes[i].scale = 1.0; /* Just in case */ - joystick->hwdata->transaxes[i].scale1 = 1.0; /* Just in case */ - joystick->hwdata->transaxes[i].scale2 = 1.0; /* Just in case */ - } - } - -/* fill nbuttons, naxes, and nhats fields */ -joystick->nbuttons = SYS_JoyData[index].buttons; -joystick->naxes = SYS_JoyData[index].axes; -/* joystick->nhats = SYS_JoyData[index].hats; */ -joystick->nhats = 0; /* No support for hats at this time */ -/* joystick->nballs = SYS_JoyData[index].balls; */ -joystick->nballs = 0; /* No support for balls at this time */ -return 0; -} - - - -/***************************************************************************/ -/* Function to update the state of a joystick - called as a device poll. */ -/* This function shouldn't update the joystick structure directly, */ -/* but instead should call SDL_PrivateJoystick*() to deliver events */ -/* and update joystick device state. */ -/***************************************************************************/ -void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick) -{ -APIRET rc; /* Generic OS/2 return code */ -int index; /* index shortcurt to joystick index */ -int i; /* Generic counter */ -int normbut; /* Number of buttons reported by joystick */ -int corr; /* Correction for button names */ -Sint16 value, change; /* Values used to update axis values */ -struct _transaxes *transaxes; /* Shortcut for Correction structure */ -Uint32 pos[MAX_AXES]; /* Vector to inform the Axis status */ -ULONG ulDataLen; /* Size of data */ -GAME_STATUS_STRUCT stGameStatus; /* Joystick Status Structure */ - -ulDataLen = sizeof(stGameStatus); -rc = DosDevIOCtl(hJoyPort, IOCTL_CAT_USER, GAME_GET_STATUS, - NULL, 0, NULL, &stGameStatus, ulDataLen, &ulDataLen); -if (rc != 0) - { - SDL_SetError("Could not read joystick status."); - return; /* Could not read data */ - } - -/* Shortcut pointer */ -index = joystick->index; -/* joystick motion events */ - -if (SYS_JoyData[index].id == 0) - { - pos[0] = stGameStatus.curdata.A.x; - pos[1] = stGameStatus.curdata.A.y; - if (SYS_JoyData[index].axes >= 3) pos[2] = stGameStatus.curdata.B.x; - else pos[2]=0; - if (SYS_JoyData[index].axes >= 4) pos[3] = stGameStatus.curdata.B.y; - else pos[3]=0; - pos[4]=0; /* OS/2 basic drivers do not support more than 4 axes joysticks */ - pos[5]=0; - } -else if (SYS_JoyData[index].id == 1) - { - pos[0] = stGameStatus.curdata.B.x; - pos[1] = stGameStatus.curdata.B.y; - pos[2]=0; - pos[3]=0; - pos[4]=0; - pos[5]=0; - } - -/* Corrects the movements using the callibration */ -transaxes = joystick->hwdata->transaxes; -for (i = 0; i < joystick->naxes; i++) - { - value = pos[i] + transaxes[i].offset; - if (value<0) - { - value*=transaxes[i].scale1; - if (value>0) value = AXIS_MIN; - } - else - { - value*=transaxes[i].scale2; - if (value<0) value = AXIS_MAX; - } - change = (value - joystick->axes[i]); - if ( (change < -JOY_AXIS_THRESHOLD) || (change > JOY_AXIS_THRESHOLD) ) - { - SDL_PrivateJoystickAxis(joystick, (Uint8)i, (Sint16)value); - } - } - -/* joystick button A to D events */ -if (SYS_JoyData[index].id == 1) corr = 2; -else corr = 0; -normbut=4; /* Number of normal buttons */ -if (joystick->nbuttons<normbut) normbut = joystick->nbuttons; -for ( i = corr; (i-corr) < normbut; ++i ) - { - /* - Button A: 1110 0000 - Button B: 1101 0000 - Button C: 1011 0000 - Button D: 0111 0000 - */ - if ( (~stGameStatus.curdata.butMask)>>4 & JOY_BUTTON_FLAG(i) ) - { - if ( ! joystick->buttons[i-corr] ) - { - SDL_PrivateJoystickButton(joystick, (Uint8)(i-corr), SDL_PRESSED); - } - } - else - { - if ( joystick->buttons[i-corr] ) - { - SDL_PrivateJoystickButton(joystick, (Uint8)(i-corr), SDL_RELEASED); - } - } - } - -/* Joystick button E to H buttons */ - /* - Button E: Axis 2 X Left - Button F: Axis 2 Y Up - Button G: Axis 2 X Right - Button H: Axis 2 Y Down - */ -if (joystick->nbuttons>=5) - { - if (stGameStatus.curdata.B.x < SYS_JoyData[index].buttoncalc[0]) SDL_PrivateJoystickButton(joystick, (Uint8)4, SDL_PRESSED); - else SDL_PrivateJoystickButton(joystick, (Uint8)4, SDL_RELEASED); - } -if (joystick->nbuttons>=6) - { - if (stGameStatus.curdata.B.y < SYS_JoyData[index].buttoncalc[1]) SDL_PrivateJoystickButton(joystick, (Uint8)5, SDL_PRESSED); - else SDL_PrivateJoystickButton(joystick, (Uint8)5, SDL_RELEASED); - } -if (joystick->nbuttons>=7) - { - if (stGameStatus.curdata.B.x > SYS_JoyData[index].buttoncalc[2]) SDL_PrivateJoystickButton(joystick, (Uint8)6, SDL_PRESSED); - else SDL_PrivateJoystickButton(joystick, (Uint8)6, SDL_RELEASED); - } -if (joystick->nbuttons>=8) - { - if (stGameStatus.curdata.B.y > SYS_JoyData[index].buttoncalc[3]) SDL_PrivateJoystickButton(joystick, (Uint8)7, SDL_PRESSED); - else SDL_PrivateJoystickButton(joystick, (Uint8)7, SDL_RELEASED); - } - -/* joystick hat events */ -/* Not Supported under OS/2 */ -/* joystick ball events */ -/* Not Supported under OS/2 */ -} - - - -/******************************************/ -/* Function to close a joystick after use */ -/******************************************/ -void SDL_SYS_JoystickClose(SDL_Joystick *joystick) -{ -if (joystick->hwdata != NULL) - { - /* free system specific hardware data */ - SDL_free(joystick->hwdata); - } -} - - - -/********************************************************************/ -/* Function to perform any system-specific joystick related cleanup */ -/********************************************************************/ -void SDL_SYS_JoystickQuit(void) -{ -joyPortClose(&hJoyPort); -} - - - -/************************/ -/************************/ -/* OS/2 Implementations */ -/************************/ -/************************/ - - -/*****************************************/ -/* Open Joystick Port, if not opened yet */ -/*****************************************/ -APIRET joyPortOpen(HFILE * hGame) -{ -APIRET rc; /* Generic Return Code */ -ULONG ulAction; /* ? */ -ULONG ulVersion; /* Version of joystick driver */ -ULONG ulDataLen; /* Size of version data */ - -/* Verifies if joyport is not already open... */ -if (*hGame != NULL) return 0; -/* Open GAME$ for read */ -rc = DosOpen((PSZ)GAMEPDDNAME, hGame, &ulAction, 0, FILE_READONLY, - FILE_OPEN, OPEN_ACCESS_READONLY | OPEN_SHARE_DENYNONE, NULL); -if (rc != 0) - { - SDL_SetError("Could not open Joystick Port."); - return -1; - } - -/* Get Joystick Driver Version... must be 2.0 or higher */ -ulVersion = 0; -ulDataLen = sizeof(ulVersion); -rc = DosDevIOCtl( *hGame, IOCTL_CAT_USER, GAME_GET_VERSION, - NULL, 0, NULL, &ulVersion, ulDataLen, &ulDataLen); -if (rc != 0) - { - joyPortClose(hGame); - SDL_SetError("Could not get Joystick Driver version."); - return -1; - } -if (ulVersion < GAME_VERSION) - { - joyPortClose(hGame); - SDL_SetError("Driver too old. At least IBM driver version 2.0 required."); - return -1; - } -return 0; -} - - - -/****************************/ -/* Close JoyPort, if opened */ -/****************************/ -void joyPortClose(HFILE * hGame) -{ -if (*hGame != NULL) DosClose(*hGame); -*hGame = NULL; -} - - - -/***************************/ -/* Get SDL Joystick EnvVar */ -/***************************/ -int joyGetEnv(struct _joycfg * joydata) -{ -char *joyenv; /* Pointer to tested character */ -char tempnumber[5]; /* Temporary place to put numeric texts */ - -joyenv = SDL_getenv("SDL_OS2_JOYSTICK"); -if (joyenv == NULL) return 0; -/* Joystick Environment is defined! */ -while (*joyenv==' ' && *joyenv!=0) joyenv++; /* jump spaces... */ -/* If the string name starts with '... get if fully */ -if (*joyenv=='\'') joyenv+=joyGetData(++joyenv,joydata->name,'\'',sizeof(joydata->name)); -/* If not, get it until the next space */ -else if (*joyenv=='\"') joyenv+=joyGetData(++joyenv,joydata->name,'\"',sizeof(joydata->name)); -else joyenv+=joyGetData(joyenv,joydata->name,' ',sizeof(joydata->name)); -/* Now get the number of axes */ -while (*joyenv==' ' && *joyenv!=0) joyenv++; /* jump spaces... */ -joyenv+=joyGetData(joyenv,tempnumber,' ',sizeof(tempnumber)); -joydata->axes = atoi(tempnumber); -/* Now get the number of buttons */ -while (*joyenv==' ' && *joyenv!=0) joyenv++; /* jump spaces... */ -joyenv+=joyGetData(joyenv,tempnumber,' ',sizeof(tempnumber)); -joydata->buttons = atoi(tempnumber); -/* Now get the number of hats */ -while (*joyenv==' ' && *joyenv!=0) joyenv++; /* jump spaces... */ -joyenv+=joyGetData(joyenv,tempnumber,' ',sizeof(tempnumber)); -joydata->hats = atoi(tempnumber); -/* Now get the number of balls */ -while (*joyenv==' ' && *joyenv!=0) joyenv++; /* jump spaces... */ -joyenv+=joyGetData(joyenv,tempnumber,' ',sizeof(tempnumber)); -joydata->balls = atoi(tempnumber); -return 1; -} - - - -/************************************************************************/ -/* Get a text from in the string starting in joyenv until it finds */ -/* the stopchar or maxchars is reached. The result is placed in name. */ -/************************************************************************/ -int joyGetData(char *joyenv, char *name, char stopchar, size_t maxchars) -{ -char *nameptr; /* Pointer to the selected character */ -int chcnt=0; /* Count how many characters where copied */ - -nameptr=name; -while (*joyenv!=stopchar && *joyenv!=0) - { - if (nameptr<(name+(maxchars-1))) - { - *nameptr = *joyenv; /* Only copy if smaller than maximum */ - nameptr++; - } - chcnt++; - joyenv++; - } -if (*joyenv==stopchar) - { - joyenv++; /* Jump stopchar */ - chcnt++; - } -*nameptr = 0; /* Mark last byte */ -return chcnt; -} - -#endif /* SDL_JOYSTICK_OS2 */ |