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harbour-core/contrib/hbcomio/comio.c
Viktor Szakats 5a2a287752 2017-09-08 16:00 UTC Viktor Szakats (vszakats users.noreply.github.com) 
* *
    * partial sync with the 3.4 fork codebase. These are the things
      synces for the most part:
      - copyright headers
      - grammar/typos in comments and some readmes
      - comment/whitespace/decorations
      - variable scoping in C files
      - DO CASE/SWITCH and some other alternate syntax usage
      - minimal amount of human readable text in strings
      - minor code updates
      - HB_TRACE() void * casts for pointers and few other changes to
        avoid C compiler warnings
      - various other, minor code cleanups
      - only Harbour/C code/headers were touched in src, utils, contrib,
        include. No 3rd party code, no make files, and with just a few
        exceptions, no 'tests' code was touched.
      - certain components were not touched were 3.4 diverged too much
        already, like f.e. hbmk2, hbssl, hbcurl, hbexpat
      - the goal was that no actual program logic should be altered by
        these changes. Except some possible minor exceptions, any such
        change is probably a bug in this patch.
      It's a massive patch, if you find anything broken after it, please
      open an Issue with the details. Build test was done on macOS.
      The goal is make it easier to see what actual code/logic was changed
      in 3.4 compared to 3.2 and to make patches easier to apply in both
      ways.
2017-09-08 16:25:13 +00:00

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/*
* I/O driver for serial port streams
*
* Copyright 2014 Przemyslaw Czerpak <druzus / at / priv.onet.pl>
*
* 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, 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; see the file LICENSE.txt. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA (or visit https://www.gnu.org/licenses/).
*
* As a special exception, the Harbour Project gives permission for
* additional uses of the text contained in its release of Harbour.
*
* The exception is that, if you link the Harbour libraries with other
* files to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the Harbour library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the Harbour
* Project under the name Harbour. If you copy code from other
* Harbour Project or Free Software Foundation releases into a copy of
* Harbour, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for Harbour, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
*
*/
/* this has to be declared before hbapifs.h is included */
#define _HB_FILE_IMPLEMENTATION_
#include "hbapi.h"
#include "hbapifs.h"
#include "hbapiitm.h"
#include "hbapierr.h"
#include "hbinit.h"
#include "hbapicom.h"
typedef struct _HB_FILE
{
const HB_FILE_FUNCS * pFuncs;
int port;
HB_MAXINT timeout;
HB_BOOL fRead;
HB_BOOL fWrite;
} HB_FILE;
static PHB_FILE s_fileNew( int port, HB_MAXINT timeout, HB_BOOL fRead, HB_BOOL fWrite );
static int s_fileGetValue( const char * pszName, int * piLen )
{
int iLen = 0, iValue = 0;
while( HB_ISDIGIT( pszName[ iLen ] ) )
iValue = iValue * 10 + ( pszName[ iLen++ ] - '0' );
*piLen = iLen;
return iValue;
}
static int s_filePortParams( const char * pszName, HB_MAXINT * pTimeout,
int * piBaud, int * piParity,
int * piSize, int * piStop,
int * piFlow )
{
int iPort = 0, iLen, iValue;
*pTimeout = -1;
*piBaud = *piParity = *piSize = *piStop = *piFlow = 0;
pszName += 3;
if( *pszName == '$' )
{
const char * pszParams = strchr( pszName, ':' );
if( pszParams != NULL && pszParams - pszName > 1 )
{
char * pszPort = hb_strndup( pszName + 1, pszParams - pszName - 1 );
iPort = hb_comFindPort( pszPort, HB_TRUE );
hb_xfree( pszPort );
pszName = pszParams;
}
}
else
{
while( HB_ISDIGIT( *pszName ) )
iPort = iPort * 10 + ( *pszName++ - '0' );
}
while( iPort > 0 && *pszName )
{
if( HB_ISDIGIT( *pszName ) )
{
iValue = s_fileGetValue( pszName, &iLen );
if( iLen == 1 )
{
if( iValue >= 1 && iValue <= 2 && *piStop == 0 )
*piStop = iValue;
else if( iValue >= 5 && iValue <= 8 && *piSize == 0 )
*piSize = iValue;
else
iPort = -1;
}
else if( iLen == 2 && *piStop == 0 && *piSize == 0 )
{
if( pszName[ 0 ] >= '1' && pszName[ 0 ] <= '2' &&
pszName[ 1 ] >= '5' && pszName[ 1 ] <= '8' )
{
*piStop = pszName[ 0 ] - '0';
*piSize = pszName[ 1 ] - '0';
}
else if( pszName[ 0 ] >= '5' && pszName[ 0 ] <= '8' &&
pszName[ 1 ] >= '1' && pszName[ 1 ] <= '2' )
{
*piStop = pszName[ 1 ] - '0';
*piSize = pszName[ 0 ] - '0';
}
else if( *piBaud )
iPort = -1;
else
*piBaud = iValue;
}
else if( *piBaud )
iPort = -1;
else
*piBaud = iValue;
pszName += iLen;
}
else if( HB_ISALPHA( *pszName ) )
{
if( hb_strnicmp( pszName, "RTS", 3 ) == 0 )
{
*piFlow |= HB_COM_FLOW_IRTSCTS;
pszName += 3;
}
else if( hb_strnicmp( pszName, "CTS", 3 ) == 0 )
{
*piFlow |= HB_COM_FLOW_ORTSCTS;
pszName += 3;
}
else if( hb_strnicmp( pszName, "DTR", 3 ) == 0 )
{
*piFlow |= HB_COM_FLOW_IDTRDSR;
pszName += 3;
}
else if( hb_strnicmp( pszName, "DSR", 3 ) == 0 )
{
*piFlow |= HB_COM_FLOW_ODTRDSR;
pszName += 3;
}
else if( hb_strnicmp( pszName, "DCD", 3 ) == 0 )
{
*piFlow |= HB_COM_FLOW_DCD;
pszName += 3;
}
else if( hb_strnicmp( pszName, "XOFF", 4 ) == 0 )
{
*piFlow |= HB_COM_FLOW_XOFF;
pszName += 4;
}
else if( hb_strnicmp( pszName, "XON", 3 ) == 0 )
{
*piFlow |= HB_COM_FLOW_XON;
pszName += 3;
}
else if( *piParity == 0 && ! HB_ISALPHA( pszName[ 1 ] ) )
{
switch( *pszName )
{
case 'N':
case 'n':
case 'E':
case 'e':
case 'O':
case 'o':
case 'S':
case 's':
case 'M':
case 'm':
*piParity = HB_TOUPPER( *pszName );
pszName++;
break;
default:
iPort = -1;
break;
}
}
else
iPort = -1;
}
else if( *pszName == ':' || *pszName == ',' || *pszName == ' ' )
pszName++;
else
iPort = -1;
}
if( *piBaud == 0 )
*piBaud = 9600;
if( *piParity == 0 )
*piParity = 'N';
if( *piSize == 0 )
*piSize = 8;
if( *piStop == 0 )
*piStop = 1;
return iPort;
}
static HB_BOOL s_fileAccept( PHB_FILE_FUNCS pFuncs, const char * pszFileName )
{
HB_SYMBOL_UNUSED( pFuncs );
if( HB_TOUPPER( pszFileName[ 0 ] ) == 'C' &&
HB_TOUPPER( pszFileName[ 1 ] ) == 'O' &&
HB_TOUPPER( pszFileName[ 2 ] ) == 'M' )
{
if( pszFileName[ 3 ] == '$' )
return strchr( pszFileName + 4, ':' ) != NULL;
else if( pszFileName[ 3 ] >= '1' && pszFileName[ 3 ] <= '9' )
{
pszFileName += 4;
while( HB_ISDIGIT( *pszFileName ) )
++pszFileName;
return *pszFileName == ':';
}
}
return HB_FALSE;
}
static PHB_FILE s_fileOpen( PHB_FILE_FUNCS pFuncs, const char * pszName,
const char * pszDefExt, HB_FATTR nExFlags,
const char * pPaths, PHB_ITEM pError )
{
PHB_FILE pFile = NULL;
HB_ERRCODE errcode = 0;
int iPort, iBaud, iParity, iSize, iStop, iFlow;
HB_BOOL fRead, fWrite;
HB_MAXINT timeout;
HB_SYMBOL_UNUSED( pFuncs );
HB_SYMBOL_UNUSED( pszDefExt );
HB_SYMBOL_UNUSED( pPaths );
fRead = fWrite = HB_TRUE;
iPort = s_filePortParams( pszName, &timeout,
&iBaud, &iParity, &iSize, &iStop, &iFlow );
if( iPort > 0 )
{
if( hb_comOpen( iPort ) == 0 &&
hb_comInit( iPort, iBaud, iParity, iSize, iStop ) == 0 &&
hb_comFlowControl( iPort, NULL, iFlow ) == 0 )
{
switch( nExFlags & ( FO_READ | FO_WRITE | FO_READWRITE ) )
{
case FO_READ:
fWrite = HB_FALSE;
break;
case FO_WRITE:
fRead = HB_FALSE;
break;
}
pFile = s_fileNew( iPort, timeout, fRead, fWrite );
}
else
errcode = hb_comGetError( iPort );
}
else
errcode = HB_COM_ERR_WRONGPORT;
hb_fsSetError( errcode );
if( pError )
{
hb_errPutFileName( pError, pszName );
if( pFile == NULL )
{
hb_errPutOsCode( pError, errcode );
hb_errPutGenCode( pError, ( HB_ERRCODE ) EG_OPEN );
}
}
return pFile;
}
static void s_fileClose( PHB_FILE pFile )
{
hb_comClose( pFile->port );
hb_fsSetError( hb_comGetError( pFile->port ) );
hb_xfree( pFile );
}
static HB_SIZE s_fileRead( PHB_FILE pFile, void * data,
HB_SIZE nSize, HB_MAXINT timeout )
{
HB_ERRCODE errcode;
long lRead = -1;
if( pFile->fRead )
{
lRead = nSize > LONG_MAX ? LONG_MAX : ( long ) nSize;
if( timeout == -1 )
timeout = pFile->timeout;
lRead = hb_comRecv( pFile->port, data, lRead, timeout );
errcode = hb_comGetError( pFile->port );
if( lRead <= 0 && errcode == HB_COM_ERR_TIMEOUT )
lRead = 0;
else if( lRead == 0 )
lRead = -1;
}
else
errcode = HB_COM_ERR_ACCESS;
hb_fsSetError( errcode );
return lRead;
}
static HB_SIZE s_fileWrite( PHB_FILE pFile, const void * data,
HB_SIZE nSize, HB_MAXINT timeout )
{
HB_ERRCODE errcode;
long lSent = -1;
if( pFile->fWrite )
{
lSent = nSize > LONG_MAX ? LONG_MAX : ( long ) nSize;
if( timeout == -1 )
timeout = pFile->timeout;
lSent = hb_comSend( pFile->port, data, lSent, timeout );
errcode = hb_comGetError( pFile->port );
if( lSent <= 0 && errcode == HB_COM_ERR_TIMEOUT )
lSent = 0;
else if( lSent == 0 )
lSent = -1;
}
else
errcode = HB_COM_ERR_ACCESS;
hb_fsSetError( errcode );
return lSent;
}
static HB_BOOL s_fileConfigure( PHB_FILE pFile, int iIndex, PHB_ITEM pValue )
{
switch( iIndex )
{
case HB_VF_TIMEOUT:
{
HB_MAXINT timeout = pFile->timeout;
if( HB_IS_NUMERIC( pValue ) )
pFile->timeout = hb_itemGetNInt( pValue );
hb_itemPutNInt( pValue, timeout );
return HB_TRUE;
}
case HB_VF_PORT:
hb_itemPutNInt( pValue, pFile->port );
return HB_TRUE;
case HB_VF_SHUTDOWN:
{
int iMode = pFile->fRead ?
( pFile->fWrite ? FO_READWRITE : FO_READ ) :
( pFile->fWrite ? FO_WRITE : -1 );
if( HB_IS_NUMERIC( pValue ) )
{
switch( hb_itemGetNI( pValue ) )
{
case FO_READ:
pFile->fRead = HB_FALSE;
break;
case FO_WRITE:
pFile->fWrite = HB_FALSE;
break;
case FO_READWRITE:
pFile->fRead = pFile->fWrite = HB_FALSE;
break;
}
}
hb_itemPutNI( pValue, iMode );
return HB_TRUE;
}
case HB_VF_RDHANDLE:
case HB_VF_WRHANDLE:
hb_itemPutNInt( pValue, ( HB_NHANDLE ) hb_comGetDeviceHandle( pFile->port ) );
return HB_TRUE;
case HB_VF_IONAME:
hb_itemPutC( pValue, "COM:" );
return HB_TRUE;
}
return HB_FALSE;
}
static HB_FHANDLE s_fileHandle( PHB_FILE pFile )
{
return pFile ? hb_comGetDeviceHandle( pFile->port ) : FS_ERROR;
}
static HB_FILE_FUNCS s_fileFuncs =
{
s_fileAccept,
NULL, /* s_fileExists */
NULL, /* s_fileDelete */
NULL, /* s_fileRename */
NULL, /* s_fileCopy */
NULL, /* s_fileDirExists */
NULL, /* s_fileDirMake */
NULL, /* s_fileDirRemove */
NULL, /* s_fileDirSpace */
NULL, /* s_fileDirectory */
NULL, /* s_fileTimeGet */
NULL, /* s_fileTimeSet */
NULL, /* s_fileAttrGet */
NULL, /* s_fileAttrSet */
NULL, /* s_fileLink */
NULL, /* s_fileLinkSym */
NULL, /* s_fileLinkRead */
s_fileOpen,
s_fileClose,
NULL, /* s_fileLock */
NULL, /* s_fileLockTest */
s_fileRead,
s_fileWrite,
NULL, /* s_fileReadAt */
NULL, /* s_fileWriteAt */
NULL, /* s_fileTruncAt */
NULL, /* s_fileSeek */
NULL, /* s_fileSize */
NULL, /* s_fileEof */
NULL, /* s_fileFlush */
NULL, /* s_fileCommit */
s_fileConfigure,
s_fileHandle
};
static PHB_FILE s_fileNew( int port, HB_MAXINT timeout, HB_BOOL fRead, HB_BOOL fWrite )
{
PHB_FILE pFile = ( PHB_FILE ) hb_xgrab( sizeof( HB_FILE ) );
pFile->pFuncs = &s_fileFuncs;
pFile->port = port;
pFile->timeout = timeout;
pFile->fRead = fRead;
pFile->fWrite = fWrite;
return pFile;
}
HB_FUNC( HB_COMIO ) { ; }
HB_CALL_ON_STARTUP_BEGIN( _hb_file_comio_init_ )
hb_fileRegisterPart( &s_fileFuncs );
HB_CALL_ON_STARTUP_END( _hb_file_comio_init_ )
#if defined( HB_PRAGMA_STARTUP )
#pragma startup _hb_file_comio_init_
#elif defined( HB_DATASEG_STARTUP )
#define HB_DATASEG_BODY HB_DATASEG_FUNC( _hb_file_comio_init_ )
#include "hbiniseg.h"
#endif
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