windows/MiscSystem.cpp

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/*----------------------------------------------------------------------------*/
/*                                                                            */
/* Copyright (c) 1995, 2004 IBM Corporation. All rights reserved.             */
/* Copyright (c) 2005-2009 Rexx Language Association. All rights reserved.    */
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/*                                                                            */
/*----------------------------------------------------------------------------*/
/*********************************************************************/
/*                                                                   */
/*   Function:  Miscellaneous system specific routines               */
/*                                                                   */
/*********************************************************************/
#include "RexxCore.h"
#include "StringClass.hpp"
#include "DirectoryClass.hpp"
#include "RexxActivity.hpp"
#include "RexxActivation.hpp"
#include "PointerClass.hpp"
#include <stdlib.h>
#include <process.h>
#include "malloc.h"
#include <signal.h>
#include "Interpreter.hpp"
#include "SystemInterpreter.hpp"
 
RexxString *SystemInterpreter::getInternalSystemName()
{
    return getSystemName();     // this is the same
}
 
 
static OSVERSIONINFO version_info={0}; /* for optimization so that GetVersionEx */
                                       /* don't have to be called each time */
 
int which_system_is_running()
{
    if (!version_info.dwOSVersionInfoSize)
    {
       /* GetVersionEx called for the first time */
       version_info.dwOSVersionInfoSize = sizeof(version_info);  // if not set --> violation error
       GetVersionEx(&version_info);
    }
    if (version_info.dwPlatformId == VER_PLATFORM_WIN32s) return 0;     // Windows 3.1
    else
      if (version_info.dwPlatformId == VER_PLATFORM_WIN32_NT) return 1; // Windows NT
    else return 2;                                            // Windows 95
}
 
RexxString *SystemInterpreter::getSystemName()
/******************************************************************************/
/* Function: Get System Name                                                  */
/******************************************************************************/
{
    char chVerBuf[26];                   // buffer for version
    int isys;
 
    isys = which_system_is_running();
 
    if (isys == 0)
    {
      strcpy(chVerBuf, "Windows");     // Windows 3.1
    }
    else if (isys == 1)
    {
      strcpy(chVerBuf, "WindowsNT"); // Windows NT
    }
    else
    {
      strcpy(chVerBuf, "Windows95");                                              // Windows 95
    }
    return new_string(chVerBuf);                     /* return as a string                */
}
 
 
RexxString *SystemInterpreter::getSystemVersion()
/******************************************************************************/
/* Function:   Return the system specific version identifier that is stored   */
/*             in the image.                                                  */
/******************************************************************************/
{
    char chVerBuf[8];                   // buffer for version
    OSVERSIONINFO vi;
    // dont forget to change sysmeths.cmd
 
    vi.dwOSVersionInfoSize = sizeof(vi);  // if not set --> violation error
 
    GetVersionEx(&vi);              // get version with extended api
    /* format into the buffer            */
    wsprintf(chVerBuf,"%i.%02i",(int)vi.dwMajorVersion,(int)vi.dwMinorVersion);
    return new_string(chVerBuf);     /* return as a string                */
}
 
 
RexxString *SystemInterpreter::getSourceString(
  RexxString * callType,               /* type of call token                */
  RexxString * programName )           /* program name token                */
/******************************************************************************/
/* Function:  Produce a system specific source string                         */
/******************************************************************************/
{
    char  *outPtr;                  /* copy pointer                     */
    const char  *chSysName;               /* copy pointer                     */
 
    RexxString *rsSysName = getSystemName();    /* start with the system stuff       */
    chSysName= rsSysName->getStringData();
 
    RexxString *source_string = raw_string(rsSysName->getBLength() + 2 + callType->getBLength() + programName->getBLength());
 
    outPtr = source_string->getWritableData();  /* point to the result data          */
    strcpy(outPtr, chSysName);           /* copy the system name              */
    outPtr +=rsSysName->getBLength();     /* step past the name                */
    *outPtr++ = ' ';                     /* put a blank between               */
                                         /* copy the call type                */
    memcpy(outPtr, callType->getStringData(), callType->getBLength());
    outPtr += callType->getBLength();     /* step over the call type           */
    *outPtr++ = ' ';                     /* put a blank between               */
                                         /* copy the system name              */
    memcpy(outPtr, programName->getStringData(), programName->getBLength());
    return source_string;                /* return the source string          */
}
 
 
int WinExceptionFilter( int xCode )
/******************************************************************************/
/* Function:  Exception Filter used by Windows exception handling             */
/******************************************************************************/
{
    return EXCEPTION_CONTINUE_SEARCH;
}
 
 
#define MAX_ADDRESS_NAME_LENGTH  250   /* maximum command environment name  */
 
 
 
/**
 * Validate an external address name.
 *
 * @param Name   The name to validate
 */
void SystemInterpreter::validateAddressName(RexxString *name )
{
    /* name too long?                    */
    if (name->getBLength() > MAX_ADDRESS_NAME_LENGTH)
    {
        /* go report an error                */
        reportException(Error_Environment_name_name, MAX_ADDRESS_NAME_LENGTH, name);
    }
}
 
 
/**
 * This was an undocumented API prior to 4.0, but is known to have been used by
 * some IBM applications. Therefore this was maintained solely for binary
 * compatibility.
 *
 * However, it is now also used to turn off processing Windows messages in a
 * special case situation.  See the SysSemaphore::waitHandle() comments for more
 * info. This is done on a per-thread basis, RexxSetProcessMessages() must be
 * invoked while executing on the proper thread.
 *
 * @return TRUE always.
 */
BOOL APIENTRY RexxSetProcessMessages(BOOL turnOn)
{
    if ( ! turnOn )
    {
        SysSemaphore::setNoMessageLoop();
    }
    return TRUE;
}