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1134 lines
33 KiB
1134 lines
33 KiB
/****************************************************************************/
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/* */
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/* COMDEV.C - */
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/* */
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/* Windows Communication Routines */
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/* */
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/****************************************************************************/
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/*************************************************************************
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**
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** Windows Communication Layer
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**
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** This is the library interface layer for the Communications Device Driver.
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** The driver presents an interface between windows based applications and the
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** communications hardware.
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**
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** /-----------------------------\
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** / Windows \
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** \ Application Program /
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** \-----------------------------/
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** | Windows Interface |
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** +-----------------------------+
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** | OEM Dependant LowLevel Code |
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** /-----------------------------\
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** / Machine Layer \
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** \ Communications Hardware /
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** \-----------------------------/
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**
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*************************************************************************/
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#define USECOMM
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#include "user.h"
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#include "comdev.h" /* Device driver structure defs */
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#include "comdevi.h" /* Device driver internal defs */
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HANDLE FAR GlobalDOSAlloc(LONG h);
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void FAR GlobalDOSFree(HANDLE h);
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#define length(string) lstrlen((char FAR *)string)
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#define UPPERCASE(x) MyToUpper(x)
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LPSTR NEAR PASCAL field(LPSTR, LPSTR);
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short getid(LPSTR);
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char FAR *GetMem(WORD);
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cinfo *cinfoPtr(int);
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void FreeMem(LPSTR);
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char _fastcall NEAR MyToUpper(char);
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/* Array of information for each communications device that we support. */
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cinfo rgcinfo[DEVMAX] = {0}; /* Device additional info table */
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/* Strings used for determining device characteristics. */
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static char CODESEG COMbuf[] = "COM1:9600,E,7,1";
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static char CODESEG LPTbuf[] = "LPT1";
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static char CODESEG AUXbuf[] = "AUX1"; /* AUX will map to COM1 */
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static char CODESEG PRNbuf[] = "PRN1"; /* PRN will map to LPT1 */
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#define CONFIGINDEX 5 /* Index to 9600,... in COMbuf */
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/*************************************************************************
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** OpenComm - open a communication device
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**
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** Synopsis:
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** short OpenComm(pszComName, cbInQue, cbOutQue)
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** FAR char *pszComName;
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** ushort cbInQue;
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** ushort cbOutQue;
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**
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** Description:
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** OpenComm opens a comunication device an associates a com handle with it. The
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** communication device is initialized to a default configuration. The csetcom
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** function call, below, should be used to initialized the device to alternate
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** values.
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**
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** OpenComm returns an id which is used in subsequent calls to reference the
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** communication device, or a negative error initialization error code.
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**
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** pszComName points to a string which contains "COMn" where "n" is allowed to
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** range from 1 to the number of COMM devices supported by the OEM. cbInQue
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** and cbOutQue reflect the receive and transmit queue sizes, respectively.
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** These queues are allocated at open time, deallocated at close time, and are
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** used by the interrupt driven transmit/receive software.
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**
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** pszComName may also point to a string which contains "LPTn" where "n" is
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** allowed to range from 1 to the number of LPT devices supported by the OEM.
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** cbInQue and cbOutQue are ignored for LPT devices. LPT devices are not
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** interrupt driven.
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**
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*************************************************************************/
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int API IOpenComm(LPSTR pszComName, WORD cbInQue, WORD cbOutQue)
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{
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short cidCur; /* ID of device */
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DCB dcbNew; /* Temp DCB */
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short ierr; /* Return code from inicom */
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register cinfo *pcinfo; /* pointer to information block */
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register qdb *pqdbNew; /* pointer to queue information */
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if ((cidCur = getid(pszComName)) == -1) /* if not recognized, return */
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return(IE_BADID); /* error to caller */
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pcinfo = cinfoPtr(cidCur); /* form pointer to info block */
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if (pcinfo->fOpen) /* if device already open */
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return(IE_OPEN); /* return error to caller */
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if (pcinfo->fReservedHardware)
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/* if device locked for some reason return error to caller ex locked for
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* use by mouse.
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*/
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return(IE_HARDWARE);
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/* do nothing if device is LPTn. */
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if (!(cidCur & LPTx))
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{
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if( (cbInQue == 0) && (cbOutQue == 0) ) /* if Queue length's zero, */
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return(IE_MEMORY); /* return memory error right away, */
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/* so a buildDCB isn't done...
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this is a common method of
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finding if the comm port is
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already opened or not...
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wanted to make it fast */
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if (lstrlen(pszComName) < 4 || BuildCommDCB(pszComName, &dcbNew) == -1)
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{
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if (BuildCommDCB(COMbuf, &dcbNew) == -1)
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return(IE_DEFAULT);
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}
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pqdbNew = &pcinfo->qdbCur; /* form pointer to qdb */
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if ((pqdbNew->pqRx = GetMem(cbInQue)) == (char FAR *)NULL)
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return(IE_MEMORY); /* no room for Rx queue */
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if ((pqdbNew->pqTx = GetMem(cbOutQue)) == (char FAR *)NULL)
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{
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FreeMem(pqdbNew->pqRx); /* no room for Tx queue */
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return(IE_MEMORY);
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}
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pqdbNew->cbqRx = cbInQue;
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pqdbNew->cbqTx = cbOutQue;
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setque(cidCur,(qdb FAR *)pqdbNew); /* init the queue's as well */
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}
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dcbNew.Id = (char)cidCur; /* set device ID in dcb */
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ierr = inicom((DCB FAR *)&dcbNew); /* attempt to init */
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if (ierr)
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{
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if (!(cidCur & LPTx)) /* if a comm device */
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{
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FreeMem(pqdbNew->pqRx); /* free Tx queue */
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FreeMem(pqdbNew->pqTx); /* free Rx queue */
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}
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return(ierr); /* return error code */
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}
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pcinfo->fOpen = TRUE; /* indicate device open */
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pcinfo->hTask = GetCurrentTask();
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return(cidCur); /* all's well, return dev id */
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}
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#ifdef DISABLE
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int FAR PASCAL OpenCommFromDCB(LPDCB pdcb, WORD cbInQue, WORD cbOutQue)
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{
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short cidCur; /* ID of device */
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short ierr; /* Return code from inicom */
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register cinfo *pcinfo; /* pointer to information block */
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register qdb *pqdbNew; /* pointer to queue information */
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cidCur = (WORD)pdcb->Id & 0x00FF;
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if ((cidCur & LPTxMask) > ((cidCur & LPTx) ? (PIOMAX - 1) : (CDEVMAX - 1)))
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return(IE_BADID); /* check cid for validity */
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pcinfo = cinfoPtr(cidCur); /* form pointer to info block */
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if (pcinfo->fOpen) /* if device already open */
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return(IE_OPEN); /* return error to caller */
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if (!(cidCur & LPTx)) /* device is LPTn */
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{
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if( (cbInQue == 0) && (cbOutQue == 0) ) /* if Queue length's zero, */
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return(IE_MEMORY); /* return memory error right away, */
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/* so a buildDCB isn't done... this
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* is a common method of finding if
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* the comm port is already opened
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* or not... wanted to make it fast
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*/
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pqdbNew = &pcinfo->qdbCur; /* form pointer to qdb */
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if ((pqdbNew->pqRx = GetMem(cbInQue)) == (char FAR *)NULL)
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return(IE_MEMORY); /* no room for Rx queue */
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if ((pqdbNew->pqTx = GetMem(cbOutQue)) == (char FAR *)NULL)
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{
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FreeMem(pqdbNew->pqRx); /* no room for Tx queue */
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return(IE_MEMORY);
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}
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pqdbNew->cbqRx = cbInQue;
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pqdbNew->cbqTx = cbOutQue;
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setque(cidCur,(qdb FAR *)pqdbNew); /* init the queue's as well */
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}
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ierr = inicom(pdcb); /* attempt to init */
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if (ierr)
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{
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if (!(cidCur & LPTx)) /* if a comm device */
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{
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FreeMem(pqdbNew->pqRx); /* free Tx queue */
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FreeMem(pqdbNew->pqTx); /* free Rx queue */
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}
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return(ierr); /* return error code */
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}
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pcinfo->fOpen = TRUE; /* indicate device open */
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pcinfo->hTask = GetCurrentTask();
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return(cidCur); /* all's well, return dev id */
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}
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#endif
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/*************************************************************************
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** SetCommState - set communciation device configuration
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**
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** Synopsis:
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** int SetCommState(pdcb)
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** LPDCB pdcb;
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**
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** Description:
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** pdcb points to an initialized Device Control Block for a device which
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** has been openned. The referenced device, as defined by the dcb's id field,
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** is set to the state as defined by the dcb. SetCommState returns 0 on
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** success, or a negative initialization error code if an error occurred. Note
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** that this will reinitialize all hardware and control as defined in the dcb,
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** but will not empty transmit or receive queues.
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**
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*************************************************************************/
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int API ISetCommState(LPDCB pdcb)
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{
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if (cinfoPtr(pdcb->Id)->fOpen == 0)
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return(IE_NOPEN); /* File must be open first */
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return(setcom(pdcb));
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}
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/*************************************************************************
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** GetCommState - return current dcb values
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**
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** Synopsis:
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** int GetCommState(cid,pdcb)
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** WORD cid;
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** LPDCB *pdcb;
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**
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** Description:
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** The dcb pointed to by pdcb is updated to reflect the current dcb in use
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** for the device referenced by cid. Returns 0 on success, -1 on illegal
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** handle or IE_OPEN if port has not been opened yet.
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**
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*************************************************************************/
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int API IGetCommState(register int cid, LPDCB pdcb)
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{
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LPDCB pdcbSrc;
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register int i;
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if (cinfoPtr(cid)->fOpen == 0) /* File must be open first */
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return(IE_NOPEN);
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if ( (pdcbSrc = getdcb(cid)) ) /* pointer to dcb for device */
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{
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i = sizeof(DCB);
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while (i--)
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*((char FAR *)pdcb)++ = *((char FAR *)pdcbSrc)++;
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return(0);
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}
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else
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return(-1);
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}
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/*************************************************************************
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** ReadComm - read characters from communication device
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**
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** Synopsis:
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** int ReadComm(cid, pbuf, size)
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** WORD cid;
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** LPSTR *pbuf;
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** int size;
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**
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** Description:
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** ReadComm reads size characters into pbuf and returns the number of characters
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** actually read. If the return value equals size bytes there may exist
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** additional characters to read. The return count will be less if the number
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** of characters present in the receive queue is less. If the return value is
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** 0 then no characters were present.
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**
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** If the return value is negative, then an error was also detected, and an
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** error code can be retrieved from GetCommError. The absolute value of the return
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** value is the number of characters read. Note that this implies that if
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** there are no characters to be read, then no error status can be returned,
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** and GetCommError should be used to read the status.
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**
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*************************************************************************/
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int API IReadComm(int cid, LPSTR pbuf, int size)
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{
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register int cbT;
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int ch;
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cid &= 0xff; /* get "pure" device ID */
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if (size == 0) /* Empty read */
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return(0);
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if ((cid & LPTxMask) > ((cid & LPTx) ? (PIOMAX - 1) : (CDEVMAX - 1)))
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return(0); /* check cid for validity */
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if (cinfoPtr(cid)->fOpen == 0)
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return(0); /* can't assume valid dcb... */
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cbT = 0;
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if (cinfoPtr(cid)->fchUnget) /* if there's a backed-up char */
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{
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cinfoPtr(cid)->fchUnget = FALSE; /* return backed up char */
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*pbuf++ = cinfoPtr(cid)->chUnget; /* and update transfer count */
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cbT++;
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}
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/*note. reccom returns -2 if no */
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/*data available, - 1 if error */
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ch = 0;
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if (SELECTOROF(lpCommReadString) == NULL)
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{
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while (cbT < size) /* up to size characters */
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{
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if ((ch = reccom(cid)) < 0) /* stop when no char available */
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break; /* or error */
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*pbuf++ = (char)ch; /* place character in users buf */
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cbT++; /* and update transfer count */
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}
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}
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else
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{
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ch = 0;
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cbT = lpCommReadString(cid, pbuf, size);
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}
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return(ch == -1 ? -cbT : cbT);
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}
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/*************************************************************************
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** UngetCommChar - push a character back onto receive queue.
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**
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** Synopsis:
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** int UngetCommChar(cid,ch)
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** WORD cid;
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** char ch;
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**
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** Description:
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** Allows an application to "back-up" one character in the receive character
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** stream by placing a character back into the receive stream. This character
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** is then the first character returned by the next call to ReadComm. UngetCommChar may
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** only be called once between calls to ReadComm. Returns 0 on success, -1 if
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** illegal id, or unable to back-up.
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**
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*************************************************************************/
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int API IUngetCommChar(int cid, char ch)
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{
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cid &= 0xFF; /* get "pure" device ID */
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if ((cid & LPTxMask) > ((cid & LPTx) ? (PIOMAX - 1) : (CDEVMAX - 1)))
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return(0); /* check cid for validity */
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if (cinfoPtr(cid)->fchUnget) /* have we already backed up 1 */
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return(-1);
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if (cinfoPtr(cid)->fOpen == 0) /* can't assume valid dcb... */
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return(-1);
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cinfoPtr(cid)->fchUnget = TRUE; /* set flag indicating backed-up*/
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cinfoPtr(cid)->chUnget = ch; /* and save the character */
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return(0);
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}
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/*************************************************************************
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** WriteComm - write characters to communication device
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**
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** Synopsis:
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** int WriteComm(cid, pbuf, size)
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** int cid;
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** LPSTR *pbuf;
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** int size;
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**
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** Description:
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** WriteComm will write size character to the communication device. The byte
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** count written is returned on success, negative byte count on error. GetCommError
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** can be used to retrieve any error code.
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**
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*************************************************************************/
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int API IWriteComm(int cid, LPSTR pbuf, int size)
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{
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int cbT;
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cid &= 0xFF; /* get "pure" device ID */
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if ((cid & LPTxMask) > ((cid & LPTx) ? (PIOMAX - 1) : (CDEVMAX - 1)))
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return(0); /* check cid for validity */
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/*return zero if not valid */
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if (cinfoPtr(cid)->fOpen == 0) /* verify port has been opened */
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return(-1);
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cbT = 0;
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if (SELECTOROF(lpCommWriteString) == NULL)
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{
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while (size--)
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{
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if (sndcom(cid,*pbuf++)) /* transmit character */
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return(-cbT); /* return if error */
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cbT++;
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}
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}
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else
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{
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cbT = lpCommWriteString(cid, pbuf, size);
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if (cbT < size)
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{
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/* For consistency, if we couldn't transmit all the characters we
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* were asked to, return the negative of the number actually
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* transmitted.
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*/
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cbT = -cbT;
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}
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}
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return(cbT);
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}
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|
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|
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/*************************************************************************
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** CloseComm - close communication device
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**
|
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** Synopsis:
|
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** int CloseComm(cid)
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** ushort cid;
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**
|
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** Description:
|
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** closes the communication device and dealloctes any buffers. Returns 0 on
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** success, -1 on error.
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**
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*************************************************************************/
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int API ICloseComm(int cid)
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|
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{
|
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register cinfo *pcinfo;
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WORD retval;
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cid &= 0xFF; /* get "pure" device ID */
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if ((cid & LPTxMask) > ((cid & LPTx) ? (PIOMAX - 1) : (CDEVMAX - 1)))
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return(-1); /* return error, cid not valid */
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if ((pcinfo = cinfoPtr(cid))->fOpen==0) /* verify port opened ... */
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return(-1); /* return error, port not open */
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retval = trmcom(cid); /* terminate the device */
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if (retval == 0x8000) /* if invalid ID */
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return(-1); /* return error code */
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pcinfo->fOpen = FALSE; /* indicate not open */
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|
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if (!(cid & LPTx))
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{
|
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FreeMem(pcinfo->qdbCur.pqRx); /* Free Rx buffer */
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FreeMem(pcinfo->qdbCur.pqTx); /* Free Rx buffer */
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}
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return(retval); /* 0 if OK, -2 if queue trashed */
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}
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|
|
|
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/*************************************************************************
|
|
** GetCommError - return device status
|
|
**
|
|
** Synopsis:
|
|
** short GetCommError(cid,pstat)
|
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** ushort cid;
|
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** stat FAR *pstat;
|
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**
|
|
** Description:
|
|
** GetCommError returns the most recent error code for the referenced device, or -1
|
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** for an illegal handle. In addition, if pstat is non-zero, GetCommError also
|
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** updates the status record it points to.
|
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**
|
|
*************************************************************************/
|
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|
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int API IGetCommError(int cid, COMSTAT FAR *pstat)
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|
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{
|
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register WORD st;
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cid &= 0xFF;
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st = stacom(cid,pstat);
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if ((st != 0x8000) && pstat && (cinfoPtr(cid)->fchUnget))
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pstat->cbInQue++;
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|
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return(st);
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}
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|
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|
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void FAR PASCAL SP_GPFaultCommCleanup(HANDLE hTask)
|
|
/* effects: When the given task gp faults, we check if it had any comm ports
|
|
* opened and we close them.
|
|
*/
|
|
{
|
|
register int i;
|
|
|
|
for (i=0; i<DEVMAX; i++) /* check all devices */
|
|
if (rgcinfo[i].fOpen && rgcinfo[i].hTask == hTask)
|
|
/* if device is open */
|
|
CloseComm(i); /* close it */
|
|
}
|
|
|
|
|
|
|
|
/*************************************************************************
|
|
** BuildCommDCB - Parse a string into a dcb.
|
|
**
|
|
** Synopsis:
|
|
** short BuildCommDCB(pszDef,pdcb)
|
|
** char FAR *pszDef;
|
|
** DCB FAR *pdcb;
|
|
**
|
|
** Description:
|
|
** Parses a passed string and fills appropriate fields in a dcb, the address
|
|
** off which is also passed. The string conforms to that of a DOS MODE
|
|
** command for COMn. For example: "COM1:9600,N,7,1". Returns 0 on success,
|
|
** -1 on error.
|
|
**
|
|
*************************************************************************/
|
|
|
|
int API IBuildCommDCB(LPSTR pszDef, LPDCB pdcb)
|
|
|
|
{
|
|
register int i;
|
|
register int tempid;
|
|
char c;
|
|
char szT[80]; /* buffer in which to put things*/
|
|
|
|
|
|
LFillStruct((LPSTR)pdcb, sizeof(DCB), 0);/* zero the dcb since probably on
|
|
* app's stack
|
|
*/
|
|
|
|
pszDef = field(pszDef,(char FAR *)szT); /* Get first token */
|
|
if ((tempid=getid((char FAR *)szT))==-1)/* Get ID of device */
|
|
return(-1); /* Unknown device */
|
|
|
|
pdcb->Id = (char)tempid; /* we have a device id */
|
|
|
|
|
|
if (tempid & LPTx) /* if a LPTx port, then let the */
|
|
return(0); /* rest default to whatever */
|
|
|
|
|
|
pszDef = field(pszDef,(char FAR *)szT); /* next field */
|
|
if (length(szT) < 2)
|
|
return(-1); /* must be at least two chars */
|
|
|
|
|
|
i = (szT[0] << 8) | szT[1]; /* cheap and sleazy mapping */
|
|
switch (i) /* based on first 2 chars */
|
|
{
|
|
case 0x3131:
|
|
i = 110;
|
|
break;
|
|
|
|
case 0x3135:
|
|
i = 150;
|
|
break;
|
|
|
|
case 0x3330:
|
|
i = 300;
|
|
break;
|
|
|
|
case 0x3630:
|
|
i = 600;
|
|
break;
|
|
|
|
case 0x3132:
|
|
i = 1200;
|
|
break;
|
|
|
|
case 0x3234:
|
|
i = 2400;
|
|
break;
|
|
|
|
case 0x3438:
|
|
i = 4800;
|
|
break;
|
|
|
|
case 0x3936:
|
|
i = 9600;
|
|
break;
|
|
|
|
case 0x3139:
|
|
i = 19200;
|
|
break;
|
|
|
|
case 0x3338: /* handle 38400 baud in BuildCommDCB() */
|
|
i = 38400;
|
|
break;
|
|
|
|
default:
|
|
return(-1);
|
|
}
|
|
|
|
pdcb->BaudRate = i;
|
|
pdcb->XonLim = 10; /* Set these up always. */
|
|
pdcb->XoffLim = 10; /* Set these up always. */
|
|
pdcb->fBinary = 1; /* Set these up always. */
|
|
pdcb->XonChar = 0x11; /* Ctrl-Q */
|
|
pdcb->XoffChar = 0x13; /* Ctrl-S */
|
|
|
|
if ((pszDef = field(pszDef,(char FAR *)szT)) == 0)
|
|
return(0);
|
|
|
|
switch (szT[0])
|
|
{
|
|
case 0:
|
|
case 'E':
|
|
c = EVENPARITY;
|
|
break;
|
|
|
|
case 'O':
|
|
c = ODDPARITY;
|
|
break;
|
|
|
|
case 'N':
|
|
c = NOPARITY;
|
|
break;
|
|
|
|
case 'M':
|
|
c = MARKPARITY;
|
|
break;
|
|
|
|
case 'S':
|
|
c = SPACEPARITY;
|
|
break;
|
|
|
|
default:
|
|
return(-1);
|
|
}
|
|
pdcb->Parity = c;
|
|
|
|
if ((pszDef = field(pszDef,(char FAR *)szT)) == 0)
|
|
return(0);
|
|
|
|
switch (szT[0])
|
|
{
|
|
case 0:
|
|
case '7':
|
|
c = 7;
|
|
break;
|
|
|
|
case '8':
|
|
c = 8;
|
|
break;
|
|
|
|
default:
|
|
return(-1);
|
|
}
|
|
pdcb->ByteSize = c;
|
|
|
|
if ((pszDef = field(pszDef,(char FAR *)szT)) == 0)
|
|
return(0);
|
|
|
|
switch (szT[0])
|
|
{
|
|
case 0:
|
|
if (pdcb->BaudRate == 110)
|
|
{
|
|
c = TWOSTOPBITS;
|
|
break;
|
|
}
|
|
/*** FALL THRU ***/
|
|
|
|
case '1':
|
|
c = ONESTOPBIT;
|
|
break;
|
|
|
|
case '2':
|
|
c = TWOSTOPBITS;
|
|
break;
|
|
|
|
default:
|
|
return(-1);
|
|
}
|
|
pdcb->StopBits = c;
|
|
|
|
if ((pszDef = field(pszDef,(char FAR *)szT)) == 0)
|
|
return(0);
|
|
|
|
if (szT[0] != 'P')
|
|
return(-1);
|
|
|
|
pdcb->RlsTimeout = INFINITE;
|
|
pdcb->CtsTimeout = INFINITE;
|
|
pdcb->DsrTimeout = INFINITE;
|
|
|
|
return(0);
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* */
|
|
/* field() - */
|
|
/* */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
LPSTR NEAR PASCAL field(LPSTR pszSrc, LPSTR lpszDst)
|
|
{
|
|
register char c;
|
|
|
|
if (!(pszSrc))
|
|
return(char FAR *)0;
|
|
|
|
if (!(*pszSrc))
|
|
return(char FAR *)0;
|
|
|
|
/* While not the end of the string. */
|
|
while (c = *pszSrc)
|
|
{
|
|
pszSrc++;
|
|
|
|
/* Look for end of string. */
|
|
if ((c == ' ') || (c == ':') || (c == ','))
|
|
{
|
|
*lpszDst = 0;
|
|
|
|
while (*pszSrc == ' ')
|
|
pszSrc++;
|
|
|
|
if (*pszSrc)
|
|
return(pszSrc);
|
|
|
|
return(char FAR *)0;
|
|
}
|
|
|
|
*lpszDst++ = UPPERCASE(c);
|
|
}
|
|
|
|
*lpszDst = 0;
|
|
|
|
return(pszSrc);
|
|
}
|
|
|
|
|
|
/*************************************************************************
|
|
**
|
|
** U T I L I T Y R O U T I N E S
|
|
**
|
|
**************************************************************************
|
|
**
|
|
** getid
|
|
** Given a (far) pointer to a string, returns the comm ID of that device,
|
|
** or -1 indicating error. This routine accepts all device references of
|
|
** the form "COMn", where n is any number from 0 to 9, or "LPTn" where
|
|
** n is any number from 1 to 9
|
|
**
|
|
*************************************************************************/
|
|
|
|
short getid(LPSTR pszComName)
|
|
|
|
{
|
|
int id;
|
|
register int base;
|
|
ushort isLPTorCOM;
|
|
LPSTR pszName;
|
|
|
|
#ifdef JAPAN
|
|
/* Brought from WIN2 */
|
|
/* ------------- support 'oemgetid' (Jul,29,1987 SatoN) ----------- */
|
|
typedef int (far *FARPROC)();
|
|
|
|
extern void far int3();
|
|
static FARPROC lpOEMgetid = (FARPROC)(-1L);
|
|
|
|
/* If lpOEMgetid has not been initialized yet, initialize it.
|
|
This assumes 'GetProcAddress' does not cause FatalExit. */
|
|
if (lpOEMgetid==(FARPROC)(-1L))
|
|
{
|
|
unsigned hComm;
|
|
if ((hComm = GetModuleHandle( (char far *)"COMM" ))==NULL)
|
|
lpOEMgetid = NULL;
|
|
else
|
|
lpOEMgetid = GetProcAddress( hComm,(char far *)"oemgetid" );
|
|
}
|
|
|
|
/* If COMM driver has the routine 'oemgetid', then call it. */
|
|
if (lpOEMgetid && (id=(*lpOEMgetid)(pszComName))!=-1)
|
|
return id;
|
|
/* ------------- end of support 'oemgetid' ---------------------- */
|
|
#endif /* JAPAN */
|
|
|
|
isLPTorCOM = TRUE; /* assume LPTx or COMx */
|
|
base = 0; /* assume serial */
|
|
id = 0; /* assume LPT1 or COM1 9/25/86 */
|
|
|
|
switch (UPPERCASE(*pszComName))
|
|
{
|
|
case 'A': /* AUX possibility */
|
|
pszName = AUXbuf; /* Search string to match */
|
|
isLPTorCOM = FALSE; /* Show AUX or PRN */
|
|
break;
|
|
|
|
case 'C': /* COMx possibility */
|
|
pszName = COMbuf; /* Search string to match */
|
|
break; /* cid base */
|
|
|
|
case 'L': /* LPTx possibility */
|
|
pszName = LPTbuf; /* Search string to match */
|
|
base = LPTx; /* cid base */
|
|
break;
|
|
|
|
case 'P': /* PRN possibility */
|
|
pszName = PRNbuf; /* Search string to match */
|
|
base = LPTx; /* cid base */
|
|
isLPTorCOM = FALSE; /* Show AUX or PRN */
|
|
break;
|
|
|
|
default:
|
|
return(-1);
|
|
}
|
|
|
|
while(*pszName != '1') /* make sure strings match */
|
|
{
|
|
if (*pszName++ != UPPERCASE(*pszComName++))
|
|
return(-1);
|
|
}
|
|
|
|
if (isLPTorCOM || /* then get device number */
|
|
(*pszComName && *pszComName != ':'))/* accept PRN or AUX */
|
|
id = (*pszComName++) - '1';
|
|
|
|
if (*pszComName == ':') /* skip ':' if present */
|
|
pszComName++;
|
|
|
|
if ((id < 0) || (*pszComName != '\0'))
|
|
return(-1);
|
|
|
|
if (id > (base ? (PIOMAX - 1) : (CDEVMAX - 1)))
|
|
return(-1);
|
|
|
|
return(base + id);
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* */
|
|
/* cinfoPtr() - */
|
|
/* */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
cinfo *cinfoPtr(int cid)
|
|
|
|
{
|
|
if (cid & LPTx)
|
|
return(&rgcinfo[((cid & LPTxMask)+CDEVMAX)]);
|
|
|
|
return(&rgcinfo[(cid & 0xFF)]);
|
|
}
|
|
|
|
|
|
/*************************************************************************
|
|
**
|
|
** GetMem
|
|
** Uses windows memory allocator to get far, global memory. We fudge here,
|
|
** in that GlobalAlloc returns a handle, which happens to be the segment
|
|
** of the fixed memory we've asked for. Hence we need to fudge it to get
|
|
** an address.
|
|
**
|
|
*************************************************************************/
|
|
|
|
LPSTR GetMem(WORD size)
|
|
|
|
{
|
|
/* See if the 286 DOS extender is installed, and if so, we must allocate
|
|
memory from conventional memory, so the queue can be used in both
|
|
protect and real modes (segment/selector ablility)
|
|
*/
|
|
|
|
if( (WinFlags & (WF_PMODE|WF_WIN286)) == (WF_PMODE|WF_WIN286) )
|
|
{
|
|
return(MAKELP(GlobalDOSAlloc((LONG)size), NULL));
|
|
}
|
|
else
|
|
{
|
|
return(MAKELP(GlobalAlloc(
|
|
GMEM_LOWER | GMEM_SHARE | GMEM_ZEROINIT | GMEM_FIXED,
|
|
(LONG)size), NULL));
|
|
}
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* */
|
|
/* FreeMem() - */
|
|
/* */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
void FreeMem(LPSTR pMem)
|
|
|
|
{
|
|
/* See if the 286 DOS extender is installed, and if so, we must deallocate
|
|
memory from conventional memory, so the queue can be used in both
|
|
protect and real modes (segment/selector ablility)
|
|
*/
|
|
|
|
if( (WinFlags & (WF_PMODE|WF_WIN286)) == (WF_PMODE|WF_WIN286) )
|
|
{
|
|
GlobalDOSFree((HANDLE)(((LONG)pMem) >> 16));
|
|
}
|
|
else
|
|
{
|
|
GlobalFree((HANDLE)(((LONG)pMem) >> 16));
|
|
}
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* */
|
|
/* TransmitCommChar() - */
|
|
/* */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
int API ITransmitCommChar(int cid, char character)
|
|
|
|
{
|
|
cid &= 0xFF;
|
|
return(ctx(cid, character));
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* */
|
|
/* SetCommEventMask() - */
|
|
/* */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
WORD FAR * API ISetCommEventMask(int cid, WORD evtmask)
|
|
|
|
{
|
|
cid &= 0xFF;
|
|
return(cevt(cid, evtmask));
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* */
|
|
/* GetCommEventMask() - */
|
|
/* */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
WORD API IGetCommEventMask(int cid, int evtmask)
|
|
|
|
{
|
|
cid &= 0xFF;
|
|
return(cevtGet(cid, evtmask));
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* */
|
|
/* SetCommBreak() - */
|
|
/* */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
int API ISetCommBreak(int cid)
|
|
|
|
{
|
|
cid &= 0xFF;
|
|
return(csetbrk(cid));
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* */
|
|
/* ClearCommBreak() - */
|
|
/* */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
int API IClearCommBreak(int cid)
|
|
|
|
{
|
|
cid &= 0xFF;
|
|
return(cclrbrk(cid));
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* */
|
|
/* FlushComm() - */
|
|
/* */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
/* Parameters:
|
|
* ushort cid -- 0=com1 1=com2
|
|
* ushort queue -- 0 = clear transmit 1 = receive
|
|
*/
|
|
|
|
int API IFlushComm(int cid, int queue)
|
|
|
|
{
|
|
cid &= 0xFF;
|
|
return(cflush(cid, queue));
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* */
|
|
/* EscapeCommFunction() - */
|
|
/* */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
LONG API IEscapeCommFunction(int cid, int fcn)
|
|
{
|
|
LONG ret;
|
|
|
|
cid &= 0xFF;
|
|
|
|
ret = cextfcn(cid, fcn);
|
|
|
|
if (SELECTOROF(lpCommWriteString) == NULL)
|
|
{
|
|
#if 0
|
|
if (fcn == GETMAXBAUD)
|
|
/* For 3.0 drivers, fake the maxbaud rate escape.
|
|
*/
|
|
ret = (LONG)CBR_19200;
|
|
else
|
|
#endif
|
|
if (fcn == GETMAXLPT)
|
|
ret = (LONG)LPTx+2; /* 3 lpt ports */
|
|
else
|
|
if (fcn == GETMAXCOM)
|
|
ret = (LONG)9;
|
|
else
|
|
if ((WORD)fcn <= RESETDEV)
|
|
/* New for 3.1, we need to return a long from this function. So fix
|
|
* things up for old 3.0 drivers who used the defined escape range
|
|
* (we had 7 escapes for 3.0 drivers).
|
|
*/
|
|
ret = (LONG)(int)(LOWORD(ret));
|
|
}
|
|
|
|
return(ret);
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* */
|
|
/* EnableCommNotification() - */
|
|
/* */
|
|
/*--------------------------------------------------------------------------*/
|
|
BOOL API IEnableCommNotification(int cid, HWND hwnd,
|
|
int recvth, int sendth)
|
|
{
|
|
cid &= 0xFF;
|
|
|
|
if (SELECTOROF(lpCommEnableNotification) == NULL)
|
|
return(FALSE);
|
|
|
|
return(lpCommEnableNotification(cid, hwnd, recvth, sendth));
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* */
|
|
/* MyToUpper() - */
|
|
/* */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
char _fastcall NEAR MyToUpper(char c)
|
|
{
|
|
return((c < (char)'a') ? c : c - (char)32);
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
/* */
|
|
/* LW_DriversInit() - */
|
|
/* */
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
void LW_DriversInit(void)
|
|
|
|
{
|
|
HMODULE hModule;
|
|
char szString[128];
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
/* Comm Initialization */
|
|
/*------------------------------------------------------------------------*/
|
|
/* Find out if the poor user is running with a 3.0 comm driver. Do this by
|
|
* checking for the 3.1 function WriteCommString. Also, save off the
|
|
* addresses of these functions so we don't rip had we imported them
|
|
* directly.
|
|
*/
|
|
LoadString(hInstanceWin, STR_COMMMODULENAME, szString, sizeof(szString));
|
|
hModule = GetModuleHandle(szString);
|
|
LoadString(hInstanceWin, STR_COMMWRITESTRING, szString, sizeof(szString));
|
|
(FARPROC)lpCommWriteString = GetProcAddress((HINSTANCE)hModule, szString);
|
|
LoadString(hInstanceWin, STR_COMMREADSTRING, szString, sizeof(szString));
|
|
(FARPROC)lpCommReadString = GetProcAddress((HINSTANCE)hModule, szString);
|
|
LoadString(hInstanceWin, STR_COMMENABLENOTIFICATION, szString, sizeof(szString));
|
|
(FARPROC)lpCommEnableNotification = GetProcAddress((HINSTANCE)hModule, szString);
|
|
}
|
|
|