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Sourcecode: maxdb-7.5.00 version File versions

SQLDBC_ClientRuntime.cpp

/*!
  @file           SQLDBC_ClientRuntime
  @author         D039759
  @ingroup        SQLDBC
  @brief          Interface to the runtime environment.
  @see

\if EMIT_LICENCE

    ========== licence begin  GPL
    Copyright (c) 2001-2004 SAP AG

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 2
    of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
    ========== licence end


\endif
*/

#include "SAPDB/Interfaces/SQLDBC/SQLDBC_ClientRuntime.h"

#include "SAPDB/RunTime/Synchronisation/RTESync_Spinlock.hpp"
#include "SAPDB/RunTime/Synchronisation/RTESync_InterlockedCounter.hpp"
#include "SAPDB/RunTime/Communication/RTEComm_ParseURI.hpp"

#include "SAPDB/RunTime/MemoryManagement/RTEMem_RteAllocator.hpp"


#include "SAPDB/SAPDBCommon/MemoryManagement/SAPDBMem_Alloca.h"

#include "SAPDB/Interfaces/Runtime/IFR_Common.h"
#include "SAPDB/Interfaces/Runtime/IFR_ErrorHndl.h"

#include "SAPDB/Interfaces/Runtime/Util/IFRUtil_Tls.h"
#include "SAPDB/Interfaces/Runtime/Util/IFRUtil_Time.h"
#include "SAPDB/Interfaces/Runtime/Util/IFRUtil_RuntimeItem.h"
#include "SAPDB/Interfaces/Runtime/Util/IFRUtil_Configuration.h"

#include "SAPDB/Interfaces/Runtime/Packet/IFRPacket_RequestPacket.h"
#include "SAPDB/Interfaces/Runtime/Packet/IFRPacket_RequestSegment.h"
#include "SAPDB/Interfaces/Runtime/Packet/IFRPacket_Part.h"

#ifndef Msg_List
#define Msg_List SAPDBErr_MessageList
#endif

// XUSER
#include "heo02.h"
#include "heo13.h"
#include "hsp78_0.h"

#ifdef WIN32
#  define STRICMP _stricmp
#else
#  define STRICMP strcasecmp
#endif

externPascal void s02applencrypt (tsp00_Name VAR_ARRAY_REF pw_clear,
                                  tsp00_CryptPw VAR_ARRAY_REF pw_crypt);

// application diagnostics in UNIX case shall go to /dev/null for
// this library.
#ifdef UNIX
extern int             sqldbglvl;
extern int             sql22_timestamp;
extern int                    sql22_keep_open;
extern char           *sql22_file;
extern int                    sql22_fd;
static int              have_appldag_file_opened = 0;
#endif

// Type definitions for C initialisation functions. Sun complains
// about a cast because it wants a C function type.
extern "C" {

typedef void (*SQLGETTLS_InitFuncType)(void*);
typedef void* (*SQLONCE_InitFuncType)(void*);

}

//----------------------------------------------------------------------
inline IFR_Bool
IFR_ConnectProperty_checkBooleanOption(IFR_ConnectProperties& p, const char *key, bool defaultvalue=false)
{
    const char *checkstr = p.getProperty(key, defaultvalue?"1":"0");

    if(STRICMP(checkstr, "1") == 0) {
        return true;
    }

    if(STRICMP(checkstr, "YES") == 0) {
        return true;
    }

    if(STRICMP(checkstr, "TRUE") == 0) {
        return true;
    }
    return false;
}



#define OOM_ERROR(messagelist)                                          \
SAPDBErr_MessageList __tmp__messagelist("SQLDBC",                       \
                                         __FILE__,                      \
                                         __LINE__,                      \
                                         SAPDBErr_MessageList::Error,   \
                                         -10760,                        \
                                         "Memory allocation failed.",   \
                                         0);                            \
messagelist.AppendNewMessage(__tmp__messagelist);


//----------------------------------------------------------------------
class SQLDBC_ClientRuntime_TraceWriter
{
public:
    SQLDBC_ClientRuntime_TraceWriter();
    ~SQLDBC_ClientRuntime_TraceWriter();

    void write(SQLDBC_IRuntime::TaskTraceContext* ctx,
               const char *s,
               IFR_Int4 length,
               IFR_Bool multithreaded=true);

    void writeln(SQLDBC_IRuntime::TaskTraceContext* ctx,
                 const char *s,
                 IFR_Int4 length,
                 IFR_Bool multithreaded=true);

    void close();
    void open();

    /**
     * Returns whether the stream is open.
     * @return <code>true</code> if the file handle is not -1.
     */
    inline IFR_Bool isOpen()
    {
        return m_filehandle!=-1;
    }


    void setFileSize(IFR_Int4 fileSizeLimit);

    void setFileName(char *nametemplate);
    inline const char *getTraceFileName() const { return m_tracefilename; }
    void setTimeStampPrefix(IFR_Bool flag) { m_timestampprefix = flag; }
private:
    void writeHeader();
    void internalClose();
    void writeToStream(const char *s, IFR_Int4 length);
    void wrapTraceFile();
    void pad(IFR_Int4 length);
    void newline();
    IFR_Bool checkThreadChange(IFR_Bool multithreaded);

    IFR_Int4        m_filehandle;
    IFR_Int4        m_filesize;
    IFR_Int4        m_filesizelimit;
    char            *m_tracefilename;
    teo07_Mutex     m_writelock;
    teo07_ThreadId  m_lastwriter;
    IFR_Int4        m_lastpos;
    IFR_Int4        m_wrapcount;
    IFR_Bool        m_timestampprefix;
};

//----------------------------------------------------------------------
SQLDBC_ClientRuntime_TraceWriter::SQLDBC_ClientRuntime_TraceWriter()
:m_filehandle(-1),
 m_filesize(0),
 m_filesizelimit(-1),
 m_tracefilename(0),
 m_lastwriter(0),
 m_lastpos(0),
 m_wrapcount(0)
{
    sqlcreatemutex(&m_writelock);
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime_TraceWriter::writeln
(SQLDBC_IRuntime::TaskTraceContext* ctx,
 const char *s,
 IFR_Int4    length,
 IFR_Bool multithreaded)
{
    multithreaded = true;

    // Check whether the stream is open, and
    // open the stream, if necessary.
    if(!isOpen()) {
        open();
    }
    if(multithreaded) {
        sqlbeginmutex(&m_writelock);
    }
    if(!isOpen()) {
        if(multithreaded) {
            sqlendmutex(&m_writelock);
        }
        return;
    }

    IFR_Int4 writelength=length;
    if(length < 0) {
        writelength = strlen(s);
    }

    // Check thread change, will print thread change.
    IFR_Bool threadchange=checkThreadChange(multithreaded);

    // We will pad
    //  - ctx->pos chars if there was a thread change, and ctx-pos is not 0
    //  - ctx->indent if m_lastpos is 0 and there was no thread change, or
    //    if there was a thread change and ctx->pos is 0
    IFR_Int4 padlen=0;
    if(threadchange) {
        if(ctx) {
            if(ctx->pos) {
                padlen=ctx->pos;
            } else {
                padlen=ctx->indent;
            }
        }
    } else if(m_lastpos == 0) {
        if(ctx) {
            padlen = ctx->indent;
        }
    }
    if(m_filesizelimit >0 &&
       (IFR_Int4)(m_filesize + writelength + ctx->indent + 2 + (m_timestampprefix ? 64 : 0)) > m_filesizelimit) {
        wrapTraceFile();
    }
    IFR_Int4 timeStrLen=0;
    if(padlen != 0 || m_lastpos == 0) {
        if(m_timestampprefix) {
            char    timestr[64];
            char    buf[128];
            IFRUtil_Time::currentTimeStamp(timestr);
            timeStrLen = sp77sprintf(buf, 128, "%s ", timestr);
            writeToStream(buf, timeStrLen);
        }
    }
    pad(padlen);
    m_lastpos=padlen + timeStrLen;
    writeToStream(s, writelength);
    newline();

    if(ctx) {
        ctx->pos = m_lastpos;
    }

    if(multithreaded) {
        sqlendmutex(&m_writelock);
    }
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime_TraceWriter::write
(SQLDBC_IRuntime::TaskTraceContext* ctx,
 const char *s,
 IFR_Int4    length,
 IFR_Bool multithreading)
{
    multithreading = true;

    // Check whether the stream is open, and
    // open the stream, if necessary.
    if(!isOpen()) {
        open();
    }
    if(multithreading) {
        sqlbeginmutex(&m_writelock);
    }
    if(!isOpen()) {
        if(multithreading) {
            sqlendmutex(&m_writelock);
        }
        return;
    }

    IFR_Int4 writelength=length;
    if(length < 0) {
        writelength = strlen(s);
    }

    // Check thread change, will print thread change.
    IFR_Bool threadchange=checkThreadChange(multithreading);

    // We will pad
    //  - ctx->pos chars if there was a thread change, and ctx-pos is not 0
    //  - ctx->indent if m_lastpos is 0 and there was no thread change, or
    //    if there was a thread change and ctx->pos is 0
    IFR_Int4 padlen=0;
    if(threadchange) {
        if(ctx) {
            if(ctx->pos) {
                padlen=ctx->pos;
            } else {
                padlen=ctx->indent;
            }
        }
    } else if(m_lastpos == 0) {
        if(ctx) {
            padlen = ctx->indent;
        }
    }
    if(m_filesizelimit >0 &&
       (IFR_Int4)(m_filesize + writelength + ctx->indent + 2 + (m_timestampprefix ? 64 : 0) ) > m_filesizelimit) {
        wrapTraceFile();
    }
    IFR_Int4 timeStrLen=0;
    if(padlen != 0 || m_lastpos == 0) {
        if(m_timestampprefix) {
            char    timestr[64];
            char    buf[128];
            IFRUtil_Time::currentTimeStamp(timestr);
            timeStrLen = sp77sprintf(buf, 128, "%s ", timestr);
            writeToStream(buf, timeStrLen);
        }
    }
    pad(padlen);
    m_lastpos=padlen + timeStrLen;
    writeToStream(s, writelength);
    if(ctx) {
        ctx->pos = m_lastpos;
    }
    if(multithreading) {
        sqlendmutex(&m_writelock);
    }
}


//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime_TraceWriter::newline()
{
    char c[3] = { 0x0D, 0x0A, 0x00 };
#ifdef _WIN32
    writeToStream(c, 2);
#else
    writeToStream(c+1, 1);
#endif
    m_lastpos = 0;
    return;
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime_TraceWriter::pad(IFR_Int4 length)
{
    const char *s="                                                         "
        "                       ";
    for(int i=0; i<length/80; ++i) {
        writeToStream(s, 80);
    }
    writeToStream(s, length % 80);
    return;
}

//----------------------------------------------------------------------
IFR_Bool
SQLDBC_ClientRuntime_TraceWriter::checkThreadChange(IFR_Bool multithreading)
{
    teo07_ThreadId currentthread=sqlgetthreadid();
    if(m_lastwriter == currentthread) {
        return false;
    }
    char    str[512];
    char    timestr[64];
    IFRUtil_Time::currentTimeStamp(timestr);
    IFR_Int4 numchars=sp77sprintf(str, 512, "--- THREAD %X --- %s ---", currentthread, timestr);
    if(m_filesizelimit >0 &&
       m_filesize + numchars + 4 > m_filesizelimit) {
        wrapTraceFile();
    }
    if(m_lastpos != 0) {
        newline();
    }
    writeToStream(str, numchars);
    newline();
    m_lastwriter = currentthread;
    return true;
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime_TraceWriter::open()
{
    sqlbeginmutex(&m_writelock);
    if(m_tracefilename == 0) {
        sqlendmutex(&m_writelock);
        return;
    }
    tsp05_RteFileError error;
    sqlfopenc(m_tracefilename,
              sp5vf_binary,
              sp5vf_write,
              sp5bk_unbuffered,
              &m_filehandle,
              &error);
    if(error.sp5fe_result != vf_ok) {
        m_filehandle = -1;
    }
    writeHeader();
    sqlendmutex(&m_writelock);
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime_TraceWriter::writeHeader()
{
    if(m_filehandle==-1) {
        return;
    }
    tsp05_RteFileError error;
    const char *headerstr = "<html><head><meta http-equiv=\"Content-Type\""
        " content=\"text/html; charset=utf-8\"></head><body><PRE><PLAINTEXT>";
    sqlfwritec(m_filehandle,
               headerstr,
               108,
               &error);
    if(error.sp5fe_result != vf_ok) {
        internalClose();
        return;
    }
    m_filesize = 108;

    {
        char versioninfo[512];
        char c[3] = { 0x0D, 0x0A, 0x00 };
#ifdef WIN32
        char *nl=(char *)c;
#else
        char *nl=(char *)c+1;
#endif
        sp77sprintf(versioninfo, sizeof(versioninfo), "SQLDBC %s %s %s%s",
                    "<MAJOR_VERSION>.<MINOR_VERSION>.<CORRECTION_LEVEL> BUILD <BUILD_NUMBER_EX_STRING>",
                    __DATE__,
                    __TIME__,
                    nl);
        int writelen=strlen(versioninfo);
        sqlfwritec(m_filehandle,
                   versioninfo,
                   writelen,
                   &error);
        if(error.sp5fe_result != vf_ok) {
            internalClose();
            return;
        }
        m_filesize += writelen;
        m_lastpos=0;
    }


    if(m_wrapcount > 0) {
        char wrapinfo[256];
        char c[3] = { 0x0D, 0x0A, 0x00 };
        sp77sprintf(wrapinfo, 256, "Warning: Trace wrapped around %d times.", m_wrapcount);
#ifdef _WIN32
        strcat(wrapinfo, c);
#else
        strcat(wrapinfo, c+1);
#endif
        int writelen = strlen(wrapinfo);
        sqlfwritec(m_filehandle,
                   wrapinfo,
                   writelen,
                   &error);
        if(error.sp5fe_result != vf_ok) {
            internalClose();
            return;
        }
        m_filesize += writelen;
        m_lastpos=0;
    }


}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime_TraceWriter::writeToStream(const char *s,
                                                IFR_Int4 length)
{
    if(m_filesizelimit >0 &&
       m_filesize + length > m_filesizelimit) {
        wrapTraceFile();
    }
    m_filesize += length;
    tsp05_RteFileError error;
    sqlfwritec(m_filehandle,
               s,
               length,
               &error);
    if(error.sp5fe_result != vf_ok) {
        internalClose();
        return;
    }
    m_lastpos += length;
    return;
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime_TraceWriter::wrapTraceFile()
{
    tsp05_RteFileError error;
    sqlfseekc(m_filehandle,
              0,
              sp5vf_seek_begin,
              &error);
    if(error.sp5fe_result != vf_ok) {
        internalClose();
        return;
    }
    m_filesize=0;
    m_wrapcount++;
    writeHeader();
    return;
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime_TraceWriter::setFileSize(IFR_Int4 fileSizeLimit)
{
    sqlbeginmutex(&m_writelock);
    if(isOpen() && fileSizeLimit > 0) {
        if(m_filesize > fileSizeLimit) {
            tsp05_RteFileError error;
            sqlftruncatec(m_filehandle,
                          fileSizeLimit,
                          &error);
            wrapTraceFile();
        }
    }
    m_filesizelimit = fileSizeLimit;
    sqlendmutex(&m_writelock);
    return;
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime_TraceWriter::setFileName(char *nametemplate)
{
    char *name = (char *) RTEMem_RteAllocator::Instance().Allocate(strlen(nametemplate)*3 + 1);
    *name      = '\0';

    char     pidStr[30];
    IFR_Int4 pid;

    sqlgetpid(&pid);
    sp77sprintf(pidStr, 30, "%d", pid);

    char *p=nametemplate;
    char *pidpos;
    do {
        pidpos=strstr(p, "%p");
        if(pidpos == 0) {
            strcat(name, p);
        } else {
            strncat(name, p, pidpos - p);
            strcat(name, pidStr);
            p = pidpos + 2;
        }
    } while(pidpos != 0);

    sqlbeginmutex(&m_writelock);
    if(isOpen()) {
        if(strcmp(m_tracefilename, name) == 0) {
            RTEMem_RteAllocator::Instance().Deallocate(name);
            sqlendmutex(&m_writelock);
            return;
        }
        internalClose();
        RTEMem_RteAllocator::Instance().Deallocate(m_tracefilename);
        m_tracefilename = name;
        open();
    } else {
        if(m_tracefilename != 0) {
            RTEMem_RteAllocator::Instance().Deallocate(m_tracefilename);
        }
        m_tracefilename = name;
    }
    sqlendmutex(&m_writelock);
}


//----------------------------------------------------------------------
SQLDBC_ClientRuntime_TraceWriter::~SQLDBC_ClientRuntime_TraceWriter()
{
    sqlbeginmutex(&m_writelock);
    internalClose();
    if(m_tracefilename) {
        RTEMem_RteAllocator::Instance().Deallocate(m_tracefilename);
    }
    sqlendmutex(&m_writelock);
    sqldestroymutex(&m_writelock);
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime_TraceWriter::close()
{
    sqlbeginmutex(&m_writelock);
    if(m_filehandle == -1) {
        sqlendmutex(&m_writelock);
        return;
    }
    internalClose();
    sqlendmutex(&m_writelock);
    return;
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime_TraceWriter::internalClose()
{
    tsp05_RteFileError ignored;
    sqlfclosec(m_filehandle, sp5vf_close_normal, &ignored);
    m_filehandle = -1;
    m_filesize   = 0;
    m_wrapcount  = 0;
}

//----------------------------------------------------------------------
SQLDBC_ClientRuntime::SQLDBC_ClientRuntime()
{
    m_tracewriter = new SQLDBC_ClientRuntime_TraceWriter();

    m_traceoptions.currentEntry   = 0;
    m_traceoptions.hex            = false;
    m_traceoptions.inputlength    = 0;
    m_traceoptions.encoding       = IFR_StringEncodingAscii;
    m_traceoptions.indent         = 0;
    m_traceoptions.flags          = 0;
    m_traceoptions.traceableLimit = 1000;
    m_traceoptions.pos            = 0;


    getTraceOptionsFromConfig();
    IFR_ErrorHndl ignoredErrorHandle(getGlobalAllocator());
    m_sharedmem.attach(ignoredErrorHandle);
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::setTraceOptions(const char *optionstring)
{
    setTraceOptions(optionstring, true);
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::setTraceOptions(const char *optionstring, SAPDB_Bool fromAPI)
{
    m_tracesettings.flags = (m_tracesettings.flags & (~31));
    m_tracesettings.traceableLimit=1000;
    m_tracesettings.filesizeLimit=-1;
    m_tracesettings.timestampPrefix=false;

    char *p=(char *)alloca(strlen(optionstring)+1);
    strcpy(p, optionstring);
    while(p && *p) {
        char *cpos=strchr(p, ':');
        if(cpos != 0)
            *cpos=0;
        switch(*p) {
        case 'c':
            m_tracesettings.flags|=1;
            break;
        case 'd':
            m_tracesettings.flags|=3;
            break;
        case 'g':
            m_tracesettings.flags|=8;
            break;
       case 'a':
            m_tracesettings.flags|=16;
            break;
        case 'p': {
            ++p;
            if(*p) {
                m_tracesettings.traceableLimit=atoi(p);
                if(m_tracesettings.traceableLimit <= 0) {
                    m_tracesettings.traceableLimit=1000;
                }
            }
            m_tracesettings.flags|=4;
            break;
        }
        case 'e': {
            ++p;
            m_errorcounter = 0;
            char *slpos = strchr(p, '/');
            if(slpos == 0) {
                m_tracesettings.stopOnErrorCode = atoi(p);
                if(m_tracesettings.stopOnErrorCode!=0) {
                    m_tracesettings.stopOnError = true;
                }
            } else {
                *slpos = '\0';
                m_tracesettings.stopOnErrorCode = atoi(p);
                if(m_tracesettings.stopOnErrorCode!=0) {
                    m_tracesettings.stopOnError = true;
                    m_tracesettings.stopOnErrorCount = atoi(slpos + 1);
                    if(m_tracesettings.stopOnErrorCount < 0) {
                        m_tracesettings.stopOnErrorCount = 0;
                    }
                }
                *slpos = '/';
            }
            break;
        }
        case 'f': {
            // only if called from trace API
            if(!fromAPI) {
                break;
            }
            ++p;
            if(!*p) {
                break;
            }
            char buffer[1024];
            if(IFRUtil_Configuration::getFullFileName(p, buffer, sizeof(buffer)) == IFR_OK) {
                m_tracewriter->setFileName(buffer);
            }
            break;
        }
        case 's':
            ++p;
            if(*p) {
                m_tracesettings.filesizeLimit=atoi(p);
                if(m_tracesettings.filesizeLimit!=-1 &&
                   m_tracesettings.filesizeLimit < 8192) {
                    m_tracesettings.filesizeLimit=8192;
                }
            }
            break;
        case 'T':
            m_tracesettings.timestampPrefix=true;
            break;
        }
        if(cpos != 0) {
            p=cpos + 1;
        } else {
            p = 0;
        }
    }

    // -- now put these options through to the respective management
    //    classes/data structures
    m_traceoptions.flags = m_tracesettings.flags;
    m_traceoptions.traceableLimit = m_tracesettings.traceableLimit;
    if(m_tracewriter) {
        if(m_traceoptions.flags == 0) {
            m_tracewriter->close();
        } else {
            m_tracewriter->setFileSize(m_tracesettings.filesizeLimit);
            m_tracewriter->setTimeStampPrefix(m_tracesettings.timestampPrefix);
        }
    }
    return;
}

//----------------------------------------------------------------------
SAPDB_Int4
SQLDBC_ClientRuntime::getTraceOptions(char *options, SAPDB_Int4 length)
{
    IFR_String traceoptions(IFR_StringEncodingAscii, getGlobalAllocator());
    IFR_Bool first = true;
    char buffer[512];
    getFlags(buffer);
    IFR_Bool memory_ok = true;
    traceoptions.append(buffer, IFR_StringEncodingAscii, IFR_NTS, memory_ok);
    if(traceoptions.getStrLen() != 0) {
        first = false;
    }

    if(first) {
        traceoptions.append("f", IFR_StringEncodingAscii, IFR_NTS, memory_ok);
    } else {
        traceoptions.append(":f", IFR_StringEncodingAscii, IFR_NTS, memory_ok);
    }
    traceoptions.append(m_tracewriter->getTraceFileName(), IFR_StringEncodingAscii, IFR_NTS, memory_ok);
    if(options && length > 1) {
        *options = '\0';
    }
    if(length < traceoptions.getStrLen() + 1) {
        return traceoptions.getStrLen() + 1;
    } else {
        memcpy(options, traceoptions.getBuffer(), traceoptions.getStrLen() + 1);
    }
    return traceoptions.getStrLen() + 1;
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::getTraceOptionsFromConfig()
{
    char buffer[1024];
    if(IFRUtil_Configuration::getFullTraceFileName(buffer, 1024) == IFR_OK) {
        char buffer2[1024];
        if(IFRUtil_Configuration::getTraceFlags(buffer2, 1024) == IFR_OK) {
            setTraceOptions(buffer2);
        }
        m_tracewriter->setFileName(buffer);
    }
}


//----------------------------------------------------------------------
SQLDBC_ClientRuntime::~SQLDBC_ClientRuntime()
{
    // DO NOT PUT ANYTHING HERE AS FOR A CLIENT THIS
    // WILL NEVER BE CALLED.
}

//----------------------------------------------------------------------
const char *
SQLDBC_ClientRuntime::getIdentifier() const
{
    return "SQLDBC_ClientRuntime <MAJOR_VERSION>.<MINOR_VERSION>.<CORRECTION_LEVEL>    "
        "BUILD <BUILD_NUMBER_EX_STRING>";
}

//----------------------------------------------------------------------
static size_t blank_strlen(char *p, size_t p_len)
{
    for(size_t l=p_len; l > 0; --l) {
        if(p[l-1] != ' ') {
            return l;
        }
    }
    return 0;
}

//----------------------------------------------------------------------
static IFR_Bool is_zero_buffer(char *p, size_t len)
{
    for(size_t i=0; i<len; ++i) {
        if(p[i]) {
            return false;
        }
    }
    return true;
}

//----------------------------------------------------------------------
static size_t blank_strlen_ucs2native(char *p, size_t p_len)
{
    if(IFR_StringEncodingUCS2Native == IFR_StringEncodingUCS2) {
       for(size_t l=p_len; l > 0; l-=2) {
           if((p[l-1] != ' ') || (p[l-2])) {
               return l;
           }
       }
    } else {
        for(size_t l=p_len; l > 0; l-=2) {
           if((p[l-2] != ' ') || (p[l-1])) {
               return l;
           }
       }
    }
    return 0;
}

//----------------------------------------------------------------------
static void
split_string(int& argc, char **argv, char *s)
{
    argc=0;
    char *previous=s;

    while(*s) {
        if(isspace(*s)) {
            *s='\0';
            if(previous!=s && (previous+1)!=s) {
                argv[argc]=previous;
                argc++;
            }
            previous = s + 1;
        }
        ++s;
    }

    if(previous!=s && (previous+1)!=s) {
        argv[argc]=previous;
        argc++;
    }
}


//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::checkKeyOption(const char *keyoption,
                                     char *servernode,
                                     SAPDB_Int4& servernodelength,
                                     char *serverdb,
                                     SAPDB_Int4& serverdblength,
                                     SAPDB_Int4& isolationlevel,
                                     SAPDB_Int4& cachelimit,
                                     SAPDB_Int4& sqlmode,
                                     SAPDB_Int4& timeout,
                                     char *username,
                                     SAPDB_Int4& usernamelength,
                                     SQLDBC_StringEncoding& usernameEncoding,
                                     SAPDBErr_MessageList& errorMessages)
{
    // We need them later, when they are possibly overridden
    // by the default key.
    SAPDB_Int4 servernode_room=servernodelength;
    SAPDB_Int4 serverdb_room=serverdblength;
    SAPDB_Int4 username_room=usernamelength;

    char *used_keyoption = 0;
    SAPDB_Bool keydefault = false;
    SAPDB_Bool keysqlopt  = false;
    if(keyoption == 0) {
        IFR_ErrorHndl tmperror(RTEMem_RteAllocator::Instance());
        tmperror.setRuntimeError(IFR_ERR_INVALID_XUSERKEY);
        SAPDBErr_MessageList tmpMessageList("SQLDBC",
                                            __FILE__,
                                            __LINE__,
                                            SAPDBErr_MessageList::Error,
                                            tmperror.getErrorCode(),
                                            tmperror.getErrorText(),
                                            0);
        errorMessages.AppendNewMessage(tmpMessageList);
        return false;
    } else {
        if(strcmp(keyoption, "DEFAULT")==0) {
            used_keyoption = (char *)"DEFAULT";
            keydefault = true;
        } else if(strcmp(keyoption, "SQLOPT")==0) {
            keysqlopt = true;
        } else {
            used_keyoption = (char *)keyoption;
        }
    }

    // now look what we have to do ...
    if(used_keyoption || keysqlopt) {
        tsp4_xuser_record xuser_record;
        tsp00_ErrText errorText;
        tsp00_Bool    ok=true;
        if(used_keyoption) {
            size_t keyoption_length = strlen(used_keyoption);
            if(keyoption_length >30) {
                IFR_ErrorHndl tmperror(RTEMem_RteAllocator::Instance());
                tmperror.setRuntimeError(IFR_ERR_INVALID_XUSERKEY);
                SAPDBErr_MessageList tmpMessageList("SQLDBC",
                                                    __FILE__,
                                                __LINE__,
                                                    SAPDBErr_MessageList::Error,
                                                    tmperror.getErrorCode(),
                                                    tmperror.getErrorText(),
                                                    0);
                errorMessages.AppendNewMessage(tmpMessageList);
                return false;
            }
            memset(xuser_record.xu_key, ' ', sizeof(xuser_record.xu_key));
            memcpy(xuser_record.xu_key, used_keyoption, keyoption_length);
            sqlgetuser(&xuser_record, NULL, errorText, &ok);
            if(!ok) {
                tsp00_ErrTextc cError;
                cError.p2c(errorText);
                IFR_ErrorHndl tmperror(RTEMem_RteAllocator::Instance());
                tmperror.setRuntimeError(IFR_ERR_XUSER_ERROR_S, cError.asCharp());
                SAPDBErr_MessageList tmpMessageList("SQLDBC",
                                                    __FILE__,
                                                    __LINE__,
                                                    SAPDBErr_MessageList::Error,
                                                    tmperror.getErrorCode(),
                                                    tmperror.getErrorText(),
                                                    0);
                errorMessages.AppendNewMessage(tmpMessageList);
                return false;
            }
        }

        // In case of DEFAULT or SQLOPT we will ask sqlarg3 for more ...
        if(keydefault || keysqlopt) {
            tsp00_Pw          ignored_password;
            tsp4_args_options options;
            tsp4_xuserset     xusertype;
            ok = true;
            options.opt_component.becomes(sp4co_sql_pc_runtime);
            sqlarg3(&xuser_record,
                    ignored_password,
                    &options,
                    xusertype,
                    errorText,
                    &ok);
            if(!ok) {
                tsp00_ErrTextc cError;
                cError.p2c(errorText);
                IFR_ErrorHndl tmperror(RTEMem_RteAllocator::Instance());
                tmperror.setRuntimeError(IFR_ERR_XUSER_ERROR_S, cError.asCharp());
                SAPDBErr_MessageList tmpMessageList("SQLDBC",
                                                    __FILE__,
                                                    __LINE__,
                                                    SAPDBErr_MessageList::Error,
                                                    tmperror.getErrorCode(),
                                                    tmperror.getErrorText(),
                                                    0);
                errorMessages.AppendNewMessage(tmpMessageList);
                return false;
            }
        }

        // OK, now we look at the individual elements of the XUSER record.

        // servernode:
        IFR_Int4 xu_servernode_length=blank_strlen(xuser_record.xu_servernode, sizeof(tsp00_NodeId));
        if(xu_servernode_length >= servernodelength) {
            IFR_ErrorHndl tmperror(RTEMem_RteAllocator::Instance());
            tmperror.setRuntimeError(IFR_ERR_XUSER_ERROR_S, "Server node name too long");
            SAPDBErr_MessageList tmpMessageList("SQLDBC",
                                                __FILE__,
                                                __LINE__,
                                                SAPDBErr_MessageList::Error,
                                                tmperror.getErrorCode(),
                                                tmperror.getErrorText(),
                                                0);
            errorMessages.AppendNewMessage(tmpMessageList);
            return false;
        } else {
            if(xu_servernode_length) {
                servernodelength = xu_servernode_length;
                memcpy(servernode, xuser_record.xu_servernode, xu_servernode_length);
                servernode[servernodelength]='\0';
            } else {
                servernodelength = 0;
            }
        }

        // serverdb
        IFR_Int4 xu_serverdb_length=blank_strlen(xuser_record.xu_serverdb, sizeof(tsp00_DbName));
        if(xu_serverdb_length >= serverdblength) {
            IFR_ErrorHndl tmperror(RTEMem_RteAllocator::Instance());
            tmperror.setRuntimeError(IFR_ERR_XUSER_ERROR_S, "Database name too long");
            SAPDBErr_MessageList tmpMessageList("SQLDBC",
                                                __FILE__,
                                                __LINE__,
                                                SAPDBErr_MessageList::Error,
                                                tmperror.getErrorCode(),
                                                tmperror.getErrorText(),
                                                0);
            errorMessages.AppendNewMessage(tmpMessageList);
            return false;
        } else {
            if(xu_serverdb_length) {
                serverdblength = xu_serverdb_length;
                memcpy(serverdb, xuser_record.xu_serverdb, xu_serverdb_length);
                serverdb[serverdblength]='\0';
            } else {
                serverdblength = 0;
            }
        }
        // transfer the values, or -1
        isolationlevel = xuser_record.xu_isolation;
        cachelimit = xuser_record.xu_cachelimit;
        timeout = xuser_record.xu_timeout;

        if(memcmp(xuser_record.xu_sqlmode, "SAPR3   ", 8)==0) {
            sqlmode = IFR_SAPR3;
        } else if(memcmp(xuser_record.xu_sqlmode, "INTERNAL", 8)==0) {
            sqlmode = IFR_INTERNAL;
        } else if(memcmp(xuser_record.xu_sqlmode, "ORACLE  ", 8)==0) {
            sqlmode = IFR_ORACLE;
        } else if(memcmp(xuser_record.xu_sqlmode, "ANSI    ", 8)==0) {
            sqlmode = IFR_ANSI;
        } else if(memcmp(xuser_record.xu_sqlmode, "DB2     ", 8)==0) {
            sqlmode = IFR_ANSI;
        } else {
            sqlmode = IFR_Nil;
        }

        // now the user
        IFR_Int4 xu_usernamelength;
        IFR_Int4 terminatorsize=1;
        if(usernameEncoding == IFR_StringEncodingAscii) {
            xu_usernamelength = blank_strlen(xuser_record.xu_user, sizeof(xuser_record.xu_user));
        } else {
            xu_usernamelength = blank_strlen_ucs2native(xuser_record.xu_userUCS2, sizeof(xuser_record.xu_userUCS2));
            terminatorsize = 2;
        }
        if(xu_usernamelength + terminatorsize >= usernamelength) {
            IFR_ErrorHndl tmperror(RTEMem_RteAllocator::Instance());
            tmperror.setRuntimeError(IFR_ERR_XUSER_ERROR_S, "User name too long");
            SAPDBErr_MessageList tmpMessageList("SQLDBC",
                                                __FILE__,
                                                __LINE__,
                                                SAPDBErr_MessageList::Error,
                                                tmperror.getErrorCode(),
                                                tmperror.getErrorText(),
                                                0);
            errorMessages.AppendNewMessage(tmpMessageList);
            return false;
        } else {
            usernamelength = xu_usernamelength;
            if(usernamelength) {
                if(usernameEncoding == IFR_StringEncodingAscii) {
                    memcpy(username, xuser_record.xu_user, usernamelength);
                    username[usernamelength]='\0';
                } else {
                    memcpy(username, xuser_record.xu_userUCS2, usernamelength);
                    username[usernamelength]='\0';
                    username[usernamelength+1]='\0';
                }
            }
        }
    }

    return true;
}


//----------------------------------------------------------------------
SAPDBMem_IRawAllocator&
SQLDBC_ClientRuntime::getGlobalAllocator()
{
    return m_allocator;
}

//----------------------------------------------------------------------
static void urldecode(IFR_String& s, IFR_Bool& memory_ok)
{
    IFR_String encoded_src(s, memory_ok);
    char space=' ';
    s.clear();

    char *p=(char *) encoded_src.getBuffer();

    while(*p) {
        if(*p == '+') {
            s.append(&space, IFR_StringEncodingAscii, 1, memory_ok);
            ++p;
        } else if(*p == '%') {
            unsigned char upper = (unsigned char) * (p+1);
            unsigned char lower = (unsigned char) * (p+2);

            if(upper >='0' && upper <='9') {
                upper -= '0';
            } else if(upper >='A' && upper <= 'F') {
                upper -= ('A' - 10);
            }

            if(lower >='0' && lower <='9') {
                lower -= '0';
            } else if(lower >='A' && lower <= 'F') {
                lower -= ('A' - 10);
            }

            upper <<= 4;
            upper += lower;

            s.append((char *)&upper, IFR_StringEncodingAscii, 1, memory_ok);
            p += 3;
        } else {
            s.append(p, IFR_StringEncodingAscii, 1, memory_ok);
            ++p;
        }
        if(!memory_ok) {
            return;
        }
    }
}

//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::parseConnectURL(const char *connecturl,
                                      IFR_ConnectProperties& properties,
                                      SAPDBErr_MessageList& errorMessages)
{
#define PARSE_ERROR                                                         \
    {                                                                       \
        SAPDBErr_MessageList tmpMessageList("SQLDBC",                       \
                                            __FILE__,                       \
                                            __LINE__,                       \
                                            SAPDBErr_MessageList::Error,    \
                                            0,                              \
                                            errortext,                      \
                                            0);                             \
        errorMessages.AppendNewMessage(tmpMessageList);                     \
        return false;                                                       \
    }


    IFR_Bool memory_ok=true;
    char *errortext=(char*)"Parse error in connect URL";
    RTEComm_ParseURI uriparser;
    Msg_List tmp_msglist;
    if(uriparser.Parse((SAPDB_Char const * const) connecturl,
                       tmp_msglist) != RTEComm_URIUtils::NoError) {
        Msg_List tmpMessageList("SQLDBC",
                                __FILE__,
                                __LINE__,
                                Msg_List::Error,
                                0,
                                "Parse error in URL.",
                                0);
        errorMessages.AppendNewMessage(tmpMessageList);
        return false;
    }

    SAPDB_UTF8 *optname = 0;
    SAPDB_UTF8 *optvalue = 0;
    IFR_Bool    first=true;
    while(first || optname) {
        if(first) {
            optname = (SAPDB_UTF8*) uriparser.FirstOption((const unsigned char *&)optvalue);
            first = false;
        } else {
            optname = (SAPDB_UTF8*) uriparser.NextOption(optname, (const unsigned char *&)optvalue);
        }
        if(optname) {
            properties.setProperty((const char *)optname, (const char *)optvalue, memory_ok);
            if(!memory_ok) {
                OOM_ERROR(errorMessages);
                return false;
            }
        }
    }

    return true;

}

//----------------------------------------------------------------------
static SQLDBC_Bool passwd_from_sqlopt(tsp00_Pw& pw)
{
    char *sqlopt_env = getenv("SQLOPT");
    SQLDBC_Bool found=false;
    if(sqlopt_env) {
        int slen;
        char *s=(char *)alloca((slen=strlen(sqlopt_env))+1);
        strcpy(s, sqlopt_env);
        char **argv=(char **)alloca(sizeof(char **)*slen);
        int    argc;
        split_string(argc, argv, s);
        int i=0;
        while(i<argc) {
            if(strcmp(argv[i],"-u")==0) {
                if(i==argc-1) {
                    return false;
                }
                ++i;
                char *comma=strchr(argv[i], ',');
                if(comma == 0) {
                    return false;
                }
                char *passwd = comma+1;
                strncpy(pw, passwd, MIN_EO00(strlen(passwd), sizeof(tsp00_Pw)));
                found=true;
                ++i;
            } else {
                ++i;
            }
        }
    }
    return found;
}



//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::getSession(const char  *connectUrl,
                                 const char  *connectCommand,
                                 const char  *password,
                                 SAPDB_Int4   passwordLength,
                                 const SQLDBC_StringEncoding commandEncoding,
                                 SAPDB_Int8&  sessionID,                                 SAPDB_UInt4& packetSize,
                                 SAPDB_Int4&  packetListSize,
                                 void       **packetList,
                                 void       **sessionInfoReply,
                                 SAPDBErr_MessageList& errorMessages,
                                 SAPDBMem_IRawAllocator *allocator)
{
    sessionID = -1;
    IFR_Bool memory_ok=true;
    // Use global allocator if no allocator passed.
    if(allocator == 0) {
        allocator = &getGlobalAllocator();
    }

    IFR_ConnectProperties properties(*allocator, memory_ok);

    if(!parseConnectURL(connectUrl,
                        properties,
                        errorMessages)) {
        return false;
    }

    // look whether a compname is present, and use it for the sqlinit
    const char *compname_property=properties.getProperty(IFR_CONNECTPROPERTY_COMPNAME, "R ifr80");
    tsp00_CompName compname;
    memset(compname, ' ', sizeof(tsp00_CompName));
    strncpy (compname, compname_property, sizeof(tsp00_CompName));
    compname[63]='\0';
    // make a runtime initialisation
    sqlinit (compname, NULL);

    // servernode will be the URI itself
    // serverdb is extracted from the URI
    RTEComm_ParseURI uriparser;
    Msg_List tmp_msglist;
    if(uriparser.Parse((SAPDB_Char const * const) connectUrl,
                       tmp_msglist) != RTEComm_URIUtils::NoError) {
        Msg_List tmpMessageList("SQLDBC",
                                __FILE__,
                                __LINE__,
                                Msg_List::Error,
                                0,
                                "Parse error in URL.",
                                0);
        errorMessages.AppendNewMessage(tmpMessageList);
        return false;
    }

    RTEComm_URI_DBPath const * path = uriparser.DBPath();

    tsp00_ErrTextc     errortext;
    tsp01_CommErr_Enum commerr;
    packetList[0]=packetList[1]=0;
    packetListSize = 1;
    SAPDB_Int4 sqlaconnect_sessionid=-1;

    // The question what to use for connect is not easy to answer.
    char *servernode_to_use = 0;
    char *protocolname = (char *) uriparser.Protocol();
    if(strcmp(protocolname, "sapnis")==0 ||
       strcmp(protocolname, "remotes")==0) {
        servernode_to_use = (char *)connectUrl;
    } else {
        if(uriparser.IsLocalLocation()) {
            servernode_to_use = "";
        } else {
            if(uriparser.IsIPLocation()) {
                const RTEComm_URI_IPLocation *iplocation = uriparser.IPLocation();
                char *tmphost = (char *) iplocation->Hostname();
                char *tmpport = (char *) iplocation->PortNo();
                if(tmpport) {
                    servernode_to_use = (char *) alloca(strlen(tmphost) + strlen(tmpport) + 2);
                } else {
                    servernode_to_use = (char *) alloca(strlen(tmphost) + 1);
                }
                strcpy(servernode_to_use, tmphost);
                if(tmpport) {
                    strcat(servernode_to_use, ":");
                    strcat(servernode_to_use, tmpport);
                }
            } else if(uriparser.IsNILocation()) {
                const RTEComm_URI_NILocation * nilocation = uriparser.NILocation();
                servernode_to_use = (char *) nilocation->SAPRouter();
            } else {
                Msg_List tmpMessageList("SQLDBC",
                                        __FILE__,
                                        __LINE__,
                                        Msg_List::Error,
                                        0,
                                        "Invalid communication method.",
                                        0);
                errorMessages.AppendNewMessage(tmpMessageList);
                return false;
            }
        }
    }
    m_connectlock.lockConnect();
    commerr = SqlAConnect((char *)servernode_to_use,
                          REFCAST_MEO00 (tsp00_DbNamec) (path->ServerDB()),
                          srvUser_esp01,
                          1,
                          &sqlaconnect_sessionid,
                          (tsp00_Int4 *)&packetSize,
                          packetList,
                          errortext);
    m_connectlock.releaseConnect();
    sessionID = sqlaconnect_sessionid;

    if(commerr != commErrOk_esp01) {
        IFR_String errStr(errortext,
                          sizeof(tsp00_ErrText),
                          IFR_StringEncodingAscii,
                          *allocator, memory_ok);
        if(!memory_ok) {
            OOM_ERROR(errorMessages);
            return false;
        }
        SAPDBErr_MessageList tmpMessageList("SQLDBC",
                                            __FILE__,
                                            __LINE__,
                                            SAPDBErr_MessageList::Error,
                                            0,
                                            errStr.getBuffer(),
                                            0);
        errorMessages.AppendNewMessage(tmpMessageList);
        return false;
    }

    if(passwordLength == SQLDBC_NTS) {
        unsigned int characters;
        unsigned int bytes;
        int terminated, corrupted, exhausted;
        if(IFR_ENCODING(commandEncoding)->stringInfo(password,
                                                     256,
                                                     1,
                                                     &characters,
                                                     &bytes,
                                                     &terminated,
                                                     &corrupted,
                                                     &exhausted)) {
            // TBD: return with error.
        }
        passwordLength = bytes;
    }

    int  client_unicode=0;
    const char *unicode_str=properties.getProperty(IFR_CONNECTPROPERTY_UNICODE, "0");
    if(STRICMP(unicode_str, "TRUE")==0 || atoi(unicode_str)) {
        client_unicode=1;
    } else {
        client_unicode=0;
    }

    const char *xuserkey_property = properties.getProperty(IFR_CONNECTPROPERTY_KEY);
    // look at first at the given password.
    tsp00_CryptPw crypted_password;
    tsp00_Pw internal_password;
    memset(crypted_password, 0, sizeof(crypted_password));
    // pad the password with blanks, in the correct encoding
    if(password && passwordLength>0) {
        if(!client_unicode) {
            for(int k=0; k<sizeof(tsp00_Pw); ++k) {
                internal_password[k]=' ';
            }
        } else {
            if(IFR_StringEncodingUCS2Native == IFR_StringEncodingUCS2) {
                for(int k=0; k<sizeof(tsp00_Pw); ++k) {
                    if(k % 2) {
                        internal_password[k] = ' ';
                    } else {
                        internal_password[k] = 0;
                    }
                }
            } else {
                for(int k=0; k<sizeof(tsp00_Pw); ++k) {
                    if(k % 2) {
                        internal_password[k] = 0;
                    } else {
                        internal_password[k] = ' ';
                    }
                }
            }
        }
        if(!client_unicode) {
            memcpy(internal_password, password, MIN_EO00(passwordLength, sizeof(tsp00_Pw)));
        } else {
            tsp00_Uint4 byteswritten;
            tsp00_Uint4 srcbytesparsed;
            sp78convertString(sp77encodingUCS2Native,
                              internal_password,
                              sizeof(tsp00_Pw),
                              &byteswritten,
                              false,
                              IFR_ENCODING(commandEncoding),
                              password,
                              passwordLength,
                              &srcbytesparsed);
        }
        s02applencrypt (internal_password, crypted_password);
    }
    // so far, so good ... now comes the XUSER
    if(xuserkey_property != 0 && strcmp(xuserkey_property, "SQLOPT") != 0 ) {
        tsp4_xuser_record xuser_record;
        memset(xuser_record.xu_key, ' ', sizeof(xuser_record.xu_key));
        memcpy(xuser_record.xu_key, xuserkey_property, MIN_EO00(strlen(xuserkey_property), sizeof(xuser_record.xu_key)));
        tsp00_ErrText errorText;
        tsp00_Bool    ok=true;
        sqlgetuser(&xuser_record, NULL, errorText, &ok);
        if(!ok) {
            tsp00_ErrTextc cError;
            cError.p2c(errorText);
            IFR_ErrorHndl tmperror(RTEMem_RteAllocator::Instance());
            tmperror.setRuntimeError(IFR_ERR_XUSER_ERROR_S, cError.asCharp());
            SAPDBErr_MessageList tmpMessageList("SQLDBC",
                                                __FILE__,
                                                __LINE__,
                                                SAPDBErr_MessageList::Error,
                                                tmperror.getErrorCode(),
                                                tmperror.getErrorText(),
                                                0);
            errorMessages.AppendNewMessage(tmpMessageList);
            SAPDBErr_MessageList ignored;
            releaseSession(sessionID, ignored);
            sessionID = -1;
            return false;
        }
        if(client_unicode) {
            // printf("CRYPTED UNICODE PASSWORD FROM XUSER RECORD\n");
            if(!is_zero_buffer(xuser_record.xu_passwordUCS2, sizeof(xuser_record.xu_passwordUCS2))) {
                memcpy(crypted_password, xuser_record.xu_passwordUCS2, sizeof(tsp00_CryptPw));
            }
        } else {
            // printf("CRYPTED PASSWORD FROM XUSER RECORD\n");
            if(!is_zero_buffer(xuser_record.xu_password, sizeof(xuser_record.xu_password))) {
                memcpy(crypted_password, xuser_record.xu_password, sizeof(tsp00_CryptPw));
            }
        }
    }
    // as if this wasn't enough hassle, we have SQLOPT in case of SQLOPT and DEFAULT
    if(xuserkey_property != 0 &&
       (strcmp(xuserkey_property, "DEFAULT")==0  || strcmp(xuserkey_property, "SQLOPT")==0)) {
        tsp4_xuser_record xuser_record;
        memset(xuser_record.xu_key, ' ', sizeof(xuser_record.xu_key));
        memcpy(xuser_record.xu_key, xuserkey_property, MIN_EO00(strlen(xuserkey_property), sizeof(xuser_record.xu_key)));
        tsp00_ErrText errorText;
        tsp00_Bool    ok=true;
        tsp4_args_options options;
        tsp4_xuserset     xusertype;
        tsp00_Pw tmp_internal_password;
        options.opt_component.becomes(sp4co_sql_pc_runtime);
        sqlarg3(&xuser_record,
                tmp_internal_password,
                &options,
                xusertype,
                errorText,
                &ok);
        if(!ok) {
            tsp00_ErrTextc cError;
            cError.p2c(errorText);
            IFR_ErrorHndl tmperror(RTEMem_RteAllocator::Instance());
            tmperror.setRuntimeError(IFR_ERR_XUSER_ERROR_S, cError.asCharp());
            SAPDBErr_MessageList tmpMessageList("SQLDBC",
                                                __FILE__,
                                                __LINE__,
                                                SAPDBErr_MessageList::Error,
                                                tmperror.getErrorCode(),
                                                tmperror.getErrorText(),
                                                0);
            errorMessages.AppendNewMessage(tmpMessageList);
            SAPDBErr_MessageList ignored;
            releaseSession(sessionID, ignored);
            sessionID = -1;
            return false;
        }
        if(xusertype.includes(sp4xu_sql_userparms)) {
            // now we have even more hassle ...
            // tmp_internal_password is always in ASCII, so if we have an UNICODE
            // connect we are fooled here ...
            if(!client_unicode) {
                s02applencrypt (tmp_internal_password, crypted_password);
            } else {
                // copy the tmp_internal_password into internal password and
                // recode it if necessary.
                if(IFR_StringEncodingUCS2Native == IFR_StringEncodingUCS2) {
                    for(int k=0; k<sizeof(tsp00_Pw); ++k) {
                        if(k % 2) {
                            internal_password[k] = ' ';
                        } else {
                            internal_password[k] = 0;
                        }
                    }
                } else {
                    for(int k=0; k<sizeof(tsp00_Pw); ++k) {
                        if(k % 2) {
                            internal_password[k] = 0;
                        } else {
                            internal_password[k] = ' ';
                        }
                    }
                }
                tsp00_Uint4 byteswritten;
                tsp00_Uint4 srcbytesparsed;
                sp78convertString(sp77encodingUCS2Native,
                                  internal_password,
                                  sizeof(tsp00_Pw),
                                  &byteswritten,
                                  false,
                                  IFR_ENCODING(IFR_StringEncodingAscii),
                                  tmp_internal_password,
                                  sizeof(tsp00_Pw),
                                  &srcbytesparsed);
                s02applencrypt (internal_password, crypted_password);
            }
        }
    }
    // ... now hopefully, we had mixed it up correctly

    char client_application[4];
    char client_version[6];
    int  client_sqlmode=IFR_INTERNAL;

    // -- check properties for packet construction
    const char *client_application_property=properties.getProperty(IFR_CONNECTPROPERTY_APPLICATION);
    if(client_application_property == 0) {
        OOM_ERROR(errorMessages);
        return false;
    }
    strncpy(client_application, client_application_property, 3);
    client_application[3]='\0';

    const char *client_version_property=properties.getProperty(IFR_CONNECTPROPERTY_APPVERSION);
    if(client_version_property==0) {
        OOM_ERROR(errorMessages);
        return false;
    }
    strncpy(client_version, client_version_property, 5);
    client_version[5]='\0';

    const char *sqlmode_str=properties.getProperty(IFR_CONNECTPROPERTY_SQLMODE, "INTERNAL");
    if(sqlmode_str==0) {
        OOM_ERROR(errorMessages);
        return false;
    }

    if((STRICMP(sqlmode_str, "ADABAS")==0)
       || (STRICMP(sqlmode_str, "SAPDB")==0)
       || (STRICMP(sqlmode_str, "INTERNAL")==0)) {
        client_sqlmode=IFR_INTERNAL;
    } else if(STRICMP(sqlmode_str, "ORACLE")==0
              || STRICMP(sqlmode_str, "SAPR3")==0) {
        client_sqlmode=IFR_ORACLE;
    } else if(STRICMP(sqlmode_str, "ANSI")==0) {
        client_sqlmode=IFR_ANSI;
    } else if(STRICMP(sqlmode_str, "DB2")==0) {
        client_sqlmode=IFR_DB2;
    }


    IFRUtil_RuntimeItem runtimeitem(*this, *allocator);

    // -- create the packet
    IFRPacket_RequestPacket *requestpacket =
        new IFR_ALLOCATOR(*allocator) IFRPacket_RequestPacket((tsp1_packet*)packetList[0],
                                                              packetSize,
                                                              client_unicode,
                                                              client_sqlmode,
                                                              client_application,
                                                              client_version,
                                                              runtimeitem,
                                                              memory_ok);
    if(requestpacket==0 || IFR_MEM_NOT_OK) {
        OOM_ERROR(errorMessages);
        return false;
    }
    IFRPacket_RequestSegment connectCommandSegment=IFRPacket_RequestSegment(*requestpacket,
                                                                            IFRPacket_CommandMessageType::Dbs_C);
    IFRPacket_CommandPart connect_cmdpart;
    connectCommandSegment.addPart(connect_cmdpart);
    IFR_String connectCommandString(connectCommand, commandEncoding, *allocator, memory_ok);
    if(!memory_ok) {
        OOM_ERROR(errorMessages);
        releaseSession(sessionID, errorMessages);
        return false;
    }
    IFR_ErrorHndl tmperror(RTEMem_RteAllocator::Instance());
    if (IFR_OK != connect_cmdpart.setText(connectCommandString, tmperror)) {
      SAPDBErr_MessageList tmpMessageList("SQLDBC",
                                          __FILE__,
                                          __LINE__,
                                          SAPDBErr_MessageList::Error,
                                          tmperror.getErrorCode(),
                                          tmperror.getErrorText(),
                                          0);
      errorMessages.AppendNewMessage(tmpMessageList);
      releaseSession(sessionID, errorMessages);
      return false;
    }

    IFRPacket_DataPart connect_datapart;
    connectCommandSegment.addPart(connect_datapart);

    connect_datapart.AddArgument();
    unsigned char *dest=connect_datapart.GetWriteData();
    *dest=csp_defined_byte;
    ++dest;
    memcpy(dest, crypted_password, sizeof(tsp00_CryptPw));
    connect_datapart.ExtendLength(1 + sizeof(tsp00_CryptPw));
    dest += sizeof(tsp00_CryptPw);
    tsp00_TermId termid;
    memset(termid, 0, sizeof(tsp00_TermId));
    sqltermid(termid);
    *dest=csp_defined_byte;
    ++dest;
    memcpy (dest, termid, sizeof(tsp00_TermId));
    connect_datapart.ExtendLength (1 + sizeof (tsp00_TermId));
    connectCommandSegment.closePart();

#if IFR_HAS_FEATUREPART
    IFR_Bool space_option_feature = IFR_ConnectProperty_checkBooleanOption(properties, IFR_CONNECTPROPERTY_SPACEOPTION);
    IFR_Bool multiple_drop_parseid_feature = IFR_ConnectProperty_checkBooleanOption(properties, IFR_CONNECTPROPERTY_MULTIDROPPARSEID);
    IFR_Bool variable_input_feature = IFR_ConnectProperty_checkBooleanOption(properties, IFR_CONNECTPROPERTY_VARIABLEINPUT);
    IFR_Bool optimized_streams_feature = IFR_ConnectProperty_checkBooleanOption(properties, IFR_CONNECTPROPERTY_OPTIMIZEDSTREAMS);
    IFR_Bool check_scrollableoption_feature = IFR_ConnectProperty_checkBooleanOption(properties, IFR_CONNECTPROPERTY_CHECKSCROLLABLE);

    if(space_option_feature ||
       multiple_drop_parseid_feature ||
       variable_input_feature ||
       optimized_streams_feature ||
       check_scrollableoption_feature) {

        IFRPacket_FeaturePart featurepart;
        connectCommandSegment.addPart(featurepart);

        if(space_option_feature) {
            if(featurepart.requestFeature(IFRPacket_Feature::SpaceOption_C)) {
                OOM_ERROR(errorMessages);
                return false;
            }
        }

        if(multiple_drop_parseid_feature) {
            if(featurepart.requestFeature(IFRPacket_Feature::MultipleDropParseID_C)) {
                OOM_ERROR(errorMessages);
                return false;
            }
        }

        if(variable_input_feature) {
            if(featurepart.requestFeature(IFRPacket_Feature::VariableInput_C)) {
                OOM_ERROR(errorMessages);
                return false;
            }
        }

        if(optimized_streams_feature) {
            if(featurepart.requestFeature(IFRPacket_Feature::OptimizedStreams_C)) {
                OOM_ERROR(errorMessages);
                return false;
            }
        }

        if(check_scrollableoption_feature) {
            if(featurepart.requestFeature(IFRPacket_Feature::CheckScrollableOption_C)) {
                OOM_ERROR(errorMessages);
                return false;
            }
        }
        connectCommandSegment.closePart();
    }
#endif

    connectCommandSegment.close();
    // -- send the packet
    SAPDB_Bool success = request(sessionID,
                                 requestpacket->GetRawPacket(),
                                 requestpacket->Length(),
                                 errorMessages);
    if(success) {
        SAPDB_Int4 replyLength;
        success = receive(sessionID,
                          sessionInfoReply,
                          replyLength,
                          errorMessages);
    }

    if(!success) {
        releaseSession(sessionID, errorMessages);
        sessionID = -1;
    }

    IFRUtil_Delete(requestpacket, *allocator);

    return success;
}

//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::releaseSession(SAPDB_Int8 sessionID,
                                     SAPDBErr_MessageList& errorMessages)
{
    if(sessionID != -1) {
        m_connectlock.lockConnect();
        sqlarelease((SAPDB_Int4)sessionID);
        m_connectlock.releaseConnect();
        return true;
    } else {
        return false;
    }
}

//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::request(SAPDB_Int8 sessionID,
                              void *requestData,
                              SAPDB_UInt4 requestDataLength,
                              SAPDBErr_MessageList& errorMessages)
{
    tsp00_ErrText errorText;
    tsp01_CommErr commErr;
    m_connectlock.lockExecute();
    sqlarequest((SAPDB_Int4)sessionID, requestData, requestDataLength, errorText, &commErr);
    if(commErr != commErrOk_esp01) {
        m_connectlock.releaseExecute();
        IFR_ErrorHndl tmperror(RTEMem_RteAllocator::Instance());
        tmperror.setRuntimeError(IFR_ERR_CONNECTION_DOWN_IIS, (int)commErr,
                                 sizeof(errorText), errorText.asCharp());
        SAPDBErr_MessageList tmpMessageList("SQLDBC",
                                            __FILE__,
                                            __LINE__,
                                            SAPDBErr_MessageList::Error,
                                            tmperror.getErrorCode(),
                                            tmperror.getErrorText(),
                                            0);
        errorMessages.AppendNewMessage(tmpMessageList);
        return false;
    }
    return true;
}

//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::receive(SAPDB_Int8 sessionID,
                              void **replyData,
                              SAPDB_Int4& replyDataLength,
                              SAPDBErr_MessageList& errorMessages)
{
    tsp00_ErrText errorText;
    tsp01_CommErr commErr;
    sqlareceive((SAPDB_Int4)sessionID, replyData, &replyDataLength, errorText, &commErr);
    m_connectlock.releaseExecute();
    if(commErr != commErrOk_esp01) {
        IFR_ErrorHndl tmperror(RTEMem_RteAllocator::Instance()) ;
        tmperror.setRuntimeError(IFR_ERR_CONNECTION_DOWN_IIS, (int)commErr,
                                 sizeof(errorText), errorText.asCharp());
        SAPDBErr_MessageList tmpMessageList("SQLDBC",
                                            __FILE__,
                                            __LINE__,
                                            SAPDBErr_MessageList::Error,
                                            tmperror.getErrorCode(),
                                            tmperror.getErrorText(),
                                            0);
        errorMessages.AppendNewMessage(tmpMessageList);
        return false;
    }
    return true;
}

//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::cancelCurrentCommand(SAPDB_Int8 sessionID,
                                           SAPDBErr_MessageList& errorMessages)
{
    // Whether there is a current command or not can only the application decide.
    sqlacancel((SAPDB_Int4)sessionID);
    return true;
}


//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::createMutex(SQLDBC_IRuntime::MutexHandle& mutexHandle,
                                  SAPDBMem_IRawAllocator& allocator,
                                  SAPDBErr_MessageList& errorMessages)
{

    teo07_Mutex *hMutex=(teo07_Mutex*)
        allocator.Allocate(sizeof(teo07_Mutex));
    if(hMutex) {
        sqlcreatemutex(hMutex);
    }
    mutexHandle=hMutex;
    return true;
}




//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::lockMutex(SQLDBC_IRuntime::MutexHandle mutexHandle)
{
    teo07_Mutex* hMutex=(teo07_Mutex*)mutexHandle;
    if (!hMutex) return false;
    // printf("LOCK MUTEX %X\n", hMutex);
    sqlbeginmutex(hMutex);
    return true;
}

//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::releaseMutex(SQLDBC_IRuntime::MutexHandle mutexHandle)
{
    teo07_Mutex* hMutex=(teo07_Mutex*)mutexHandle;
    if (!hMutex) return false;
    // printf("RELEASE MUTEX %X\n", hMutex);
    sqlendmutex(hMutex);
    return true;
}

//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::destroyMutex(SQLDBC_IRuntime::MutexHandle& mutexHandle,
                                   SAPDBMem_IRawAllocator& allocator,
                                   SAPDBErr_MessageList& errorMessages)
{
    teo07_Mutex *hMutex = (teo07_Mutex *) mutexHandle;
    if (!hMutex) return false;
    // printf("DESTROY MUTEX %X\n", hMutex);
    sqldestroymutex(hMutex);
    allocator.Deallocate(mutexHandle);
    mutexHandle=0;
    return true;
}


//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::createCounter(CounterHandle& counterHandle,
                                    SAPDBMem_IRawAllocator& allocator,
                                    SAPDBErr_MessageList& errorMessages)
{
    RTESync_InterlockedCounter<long> *counter=new IFR_ALLOCATOR(allocator) RTESync_InterlockedCounter<long>(0);
    counterHandle=counter;
    return true;
}

//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::destroyCounter(CounterHandle counterHandle,
                                     SAPDBMem_IRawAllocator& allocator,
                                     SAPDBErr_MessageList& errorMessages)
{
    RTESync_InterlockedCounter<long> *counter=(RTESync_InterlockedCounter<long> *) counterHandle;
    IFRUtil_Delete(counter, allocator);
    return true;
}

//----------------------------------------------------------------------
SAPDB_UInt4
SQLDBC_ClientRuntime::nextCounter(CounterHandle counterHandle)
{
    RTESync_InterlockedCounter<long> *counter =
        (RTESync_InterlockedCounter<long> *) counterHandle;
    SAPDB_UInt4 result = (SAPDB_UInt4) counter->Increment();
    return result;
}
//----------------------------------------------------------------------
SQLDBC_IRuntime::TaskID
SQLDBC_ClientRuntime::getCurrentTaskID()
{
    return (SQLDBC_IRuntime::TaskID) sqlgetthreadid();
}

//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::createSemaphore(SemaphoreHandle& semaphoreHandle,
                                      SAPDB_Int4 initialValue,
                                      SAPDBMem_IRawAllocator& allocator,
                                      SAPDBErr_MessageList& errorMessages)
{
  teo07_ThreadSemaphore *result = new IFR_ALLOCATOR(allocator) teo07_ThreadSemaphore;
  if(result == 0) {
      OOM_ERROR(errorMessages);
      return false;
  }
  tsp00_ErrTextc errtext;
  teo07_ThreadErr err;
  sqlcreatesem(result,
               initialValue,
               errtext,
               &err);
  if(err /* != THR_OK_EO07 */ ) {
      IFRUtil_Delete(result, allocator);
      IFR_ErrorHndl tmperror(allocator);
      tmperror.setRuntimeError(IFR_ERR_SYSTEM_ERROR_S,(char *)errtext);
      SAPDBErr_MessageList tmpMessageList("SQLDBC",
                                          __FILE__,
                                          __LINE__,
                                          SAPDBErr_MessageList::Error,
                                          tmperror.getErrorCode(),
                                          tmperror.getErrorText(),
                                          0);
      errorMessages.AppendNewMessage(tmpMessageList);
      semaphoreHandle = 0;
      return false;
   }
   semaphoreHandle = result;
   return true;
}

//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::waitSemaphore(SemaphoreHandle semaphoreHandle)
{
    teo07_ThreadSemaphore *semaphore =
        (teo07_ThreadSemaphore *) semaphoreHandle;
    if (!semaphore) return false;
    // DEADLOCK DEBUGGING
#if 0
    teo07_ThreadErr err;
    sqltimedwaitsem(*semaphore, 5, &err);
    if(err == THR_TIMEOUT_EO07) {
        __asm { int 3 };
    }
#else
    // printf("-------------------->                     WAIT SEM %p\n", semaphoreHandle);
    sqlwaitsem(*semaphore);

#endif
    return true;
}

//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::signalSemaphore(SemaphoreHandle semaphoreHandle)
{
    teo07_ThreadSemaphore *semaphore =
        (teo07_ThreadSemaphore *) semaphoreHandle;
    if (!semaphore) return false;
    // printf("-------------------->                     SIGNAL SEM %p\n", semaphoreHandle);
    sqlsignalsem(*semaphore);
    return true;
}

//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::destroySemaphore(SemaphoreHandle& semaphoreHandle,
                                       SAPDBMem_IRawAllocator& allocator,
                                       SAPDBErr_MessageList& errorMessages)
{
    teo07_ThreadSemaphore *semaphore =
        (teo07_ThreadSemaphore *) semaphoreHandle;
    if (!semaphore) return false;
    sqldestroysem(*semaphore);
    IFRUtil_Delete(semaphore, allocator);
    semaphoreHandle=0;
    return true;
}

//======================================================================
// Tracing
//======================================================================

//----------------------------------------------------------------------
static void initTaskTraceContext(void *p)
{
    SQLDBC_IRuntime::TaskTraceContext* tt =
        (SQLDBC_IRuntime::TaskTraceContext*)p;
    tt->currentEntry      = 0;
    tt->hex               = false;
    tt->inputlength       = 0;
    tt->encoding          = SQLDBC_StringEncodingAscii;
    tt->indent            = 0;
    tt->flags             = 0;
    tt->traceableLimit    = 0;
    tt->pos               = 0;
    return;
}

//----------------------------------------------------------------------
SQLDBC_IRuntime::TaskTraceContext*
SQLDBC_ClientRuntime::getTaskTraceContext()
{
    if(m_traceoptions.flags) {
        SQLDBC_IRuntime::TaskTraceContext *result=
            (SQLDBC_IRuntime::TaskTraceContext *)
            sqltlsgetmemory(0,
                            sizeof(SQLDBC_IRuntime::TaskTraceContext),
                            (SQLGETTLS_InitFuncType)initTaskTraceContext,
                            true);
        if(result) {
            result->flags          = m_traceoptions.flags;
            result->traceableLimit = m_traceoptions.traceableLimit;
        }
        return result;
    } else {
        return 0;
    }
}

//== Trace Output ======================================================

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::write(const char *s, SAPDB_Int4 size)
{
    if(m_tracewriter) {
        m_tracewriter->write(getTaskTraceContext(), s, size);
    }
    return;
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::writeln(const char *s, SAPDB_Int4 size)
{
    if(m_tracewriter) {
        m_tracewriter->writeln(getTaskTraceContext(), s, size);
    }
    return;
}


//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::write_singlethreaded(const char *s, SAPDB_Int4 size)
{
    if(m_tracewriter) {
        m_tracewriter->write(getTaskTraceContext(), s, size, false);
    }
    return;
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::writeln_singlethreaded(const char *s, SAPDB_Int4 size)
{
    if(m_tracewriter) {
        m_tracewriter->writeln(getTaskTraceContext(), s, size, false);
    }
    return;
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::updateTraceFlags(SAPDB_Bool& traceEnabled)
{
    checkTraceUpdate();
    if(m_traceoptions.flags) {
        traceEnabled = true;
    } else {
        traceEnabled = false;
    }
    return;
}

//----------------------------------------------------------------------
SAPDB_Bool
SQLDBC_ClientRuntime::traceError(SAPDB_Int4 errorcode)
{
    if(m_tracesettings.stopOnError) {
        if(errorcode == m_tracesettings.stopOnErrorCode) {
            ++m_errorcounter;
            if(m_errorcounter > m_tracesettings.stopOnErrorCount) {
                writeln("TRACE STOPPED (STOP ON ERROR)", 29);
                setTraceOptions("", false);
                char flags[256];
                getFlags(flags);
                m_sharedmem.setFlags(flags);
                return true;
            }
        }
    }
    return false;
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::getFlags(char *flags)
{
    *flags='\0';
    IFR_Bool optionset=false;
    if(m_tracesettings.flags & 0x01) {
        strcat(flags, "c");
        optionset=true;
    }
    if(m_tracesettings.flags & 0x02) {
        strcat(flags, optionset?":d":"d");
        optionset=true;
    }
    if(m_tracesettings.flags & 0x04) {
        char buffer[100];
        sp77sprintf(buffer, 100, optionset?":p%d":"p%d", m_tracesettings.traceableLimit);
        strcat(flags, buffer);
        optionset=true;
    }
    if(m_tracesettings.flags & 0x08) {
        strcat(flags, optionset?":g":"g");
        optionset=true;
    }
    if(m_tracesettings.timestampPrefix) {
        strcat(flags, optionset?":T":"T");
        optionset=true;
    }
    if(m_tracesettings.filesizeLimit > 0) {
        char buffer[100];
        sp77sprintf(buffer, 100, optionset?":s%d":"s%d", m_tracesettings.filesizeLimit);
        strcat(flags, buffer);
    }
    if(m_tracesettings.stopOnError) {
        if(m_tracesettings.stopOnErrorCount == 0) {
            char buffer[100];
            sp77sprintf(buffer, 100, optionset?":e%d":"e%d", m_tracesettings.stopOnErrorCode);
            strcat(flags, buffer);
        } else {
            char buffer[100];
            sp77sprintf(buffer, 100, optionset?":e%d/%d":"e%d/%d",
                        m_tracesettings.stopOnErrorCode,
                        m_tracesettings.stopOnErrorCount);
            strcat(flags, buffer);
        }
    }
    return;
}


//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::checkTraceUpdate()
{
    if(!m_sharedmem.isCurrent()) {
        // first try the global sledge hammer.
        if(m_sharedmem.mustReReadConfiguration()) {
            getTraceOptionsFromConfig();
            char flags[256];
            getFlags(flags);
            m_sharedmem.setFlags(flags);
        } else if(m_sharedmem.settingsQueried()) {
            char flags[256];
            getFlags(flags);
            m_sharedmem.setFlags(flags);
            return;
        } else if(m_sharedmem.refreshRequested()) {
            getTraceOptionsFromConfig();
            char flags[256];
            getFlags(flags);
            m_sharedmem.setFlags(flags);
            return;
        } else {
            char *newflags = m_sharedmem.flagsChanged();
            if(newflags != 0) {
                setTraceOptions(newflags, false);
                return;
            } else {
                m_sharedmem.acknowledge();
            }
        }
    }
    return;
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::addTraceFlags(unsigned int flags)
{
    m_tracesettings.flags |= flags;
    m_traceoptions.flags = m_tracesettings.flags;
    return;
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::removeTraceFlags(unsigned int flags)
{
    unsigned int mask = 0xFFFFFFFF - flags;
    m_tracesettings.flags &= mask;
    m_traceoptions.flags = m_tracesettings.flags;
    return;
}

//----------------------------------------------------------------------
SAPDBMEM_STATIC_RAW_ALLOCATE(ClientRuntime_InstanceData, sizeof(SQLDBC_ClientRuntime));

static SQLDBC_Int4 ClientRuntime_Initialized;

static SQLDBC_ClientRuntime *ClientRuntime_Instance;

extern "C" void IFR_Connection_GlobalLock_Initialize();


#ifdef UNIX
//----------------------------------------------------------------------
extern "C" void close_appldiag_file(void)
{
    if(have_appldag_file_opened && sql22_fd >=0) {
        have_appldag_file_opened = 0;
        sql22_keep_open = 0;
        close(sql22_fd);
        sql22_fd = -1;
    }
    return;
}
#endif


//----------------------------------------------------------------------
static void* initializeClientRuntime(void *)
{
#ifdef UNIX
    // 0. disable applcation diagnostic messages written to unix console
    sql22_file = 0;
    sql22_fd = open("test.txt", O_WRONLY);
    if(sql22_fd >= 0) {
        have_appldag_file_opened = 1;
    }

    if(!atexit(&close_appldiag_file)) {
        sql22_keep_open = 1; // we want to avoid continous open and close of
        // /dev/null for performance reasons.
    } else {
        sql22_keep_open = 0;
    }
#endif
     // 1. threading
    teo07_Thread thread;
    tsp00_ErrTextc errortext;
    teo07_ThreadErr threaderror;
    sqlinit_multithreading(&thread,
                           errortext,
                           &threaderror);

    void *p = (void *) ClientRuntime_InstanceData;
    ClientRuntime_Instance = new (p) SQLDBC_ClientRuntime();
    return 0;
}

#ifndef WIN32
//----------------------------------------------------------------------
SQLDBC_ClientRuntime::ConnectLock::ConnectLock()
:m_writelocking(false),
 m_waitingreaders(0),
 m_waitingwriters(0),
 m_activereaders(0)
{
    sqlcreatemutex(&m_writerlock);
    tsp00_ErrTextc  errtext;
    teo07_ThreadErr error;
    sqlcreatesem(&m_readersem, 0, errtext, &error);
}

//----------------------------------------------------------------------
SQLDBC_ClientRuntime::ConnectLock::~ConnectLock()
{
    sqldestroymutex(&m_writerlock);
    sqldestroysem(m_readersem);
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::ConnectLock::lockExecute()
{
    m_datalock.Lock();
    // if we are in the process of acquiring a
    // write lock for a connect, or in the
    // mid of a connect, we must block here

    if(m_writelocking) {
        // we will add us to the queue, and
        // release the lock ...
        m_waitingreaders++;
        m_datalock.Unlock();
        // ... and wait until our semaphore goes to green
        sqlwaitsem(m_readersem);
        // if we have been waked up, the
        // number of active readers is managed by
        // the wakeup call,
        // and the writerlock remains locked.
    } else {
        // add ourself to the number of readers
        m_activereaders++;
        // the first reader must lock the door
        // for any writer
        if(m_activereaders == 1) {
            sqlbeginmutex(&m_writerlock);
        }
        m_datalock.Unlock();
    }
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::ConnectLock::releaseExecute()
{
    m_datalock.Lock();
    // dumpstate("RELEASE EXECUTE");
    m_activereaders--;

    // if we are the last that goes away, we will unlock the writer
    // lock, and maybe passing a writer (connect) through.
    if(m_activereaders == 0) {
        // printf("LAST READER\n");
        sqlendmutex(&m_writerlock);
    } else {
        // printf("READER # %d\n", m_activereaders);
    }
    m_datalock.Unlock();
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::ConnectLock::lockConnect()
{
    m_datalock.Lock();

    if(m_writelocking) {
        m_waitingwriters++;
        m_datalock.Unlock();
        sqlbeginmutex(&m_writerlock);
    } else {
        m_writelocking=true;
        m_waitingwriters++;
        m_datalock.Unlock();
        sqlbeginmutex(&m_writerlock);
    }
    m_datalock.Lock();
    m_waitingwriters--;
    m_datalock.Unlock();
}

//----------------------------------------------------------------------
void
SQLDBC_ClientRuntime::ConnectLock::releaseConnect()
{
    m_datalock.Lock();

    if(m_waitingwriters > 0) {
        // simply let the writer through could result
        // in a starvation of the other requests
        if(m_waitingreaders > 0) {
            // ... so we must wake up all those
            // readers that wait.
            for(int i=0; i<m_waitingreaders; ++i) {
                sqlsignalsem(m_readersem);
            }
            // adjust the number of active readers,
            // such that the writer lock is posted
            // when the last reader is gone.
            m_activereaders=m_waitingreaders;
            // the writer lock will remain locked,
            // the last reader will unlock it
            m_waitingreaders=0;
        } else {
            // ... there is no reader waiting for action, we may
            // let the writer through
            sqlendmutex(&m_writerlock);
        }
    } else {
        // There is no writer waiting, so simply wake up all
        // readers, and give up 'writelocking' too.
        if(m_waitingreaders > 0) {
            m_writelocking=false;
            m_activereaders=m_waitingreaders;
            for(int i=0; i<m_waitingreaders; ++i) {
                sqlsignalsem(m_readersem);
            }
            m_waitingreaders=0;
        } else {
            m_writelocking=false;
            sqlendmutex(&m_writerlock);
        }
    }
    m_datalock.Unlock();
}

#endif




//----------------------------------------------------------------------
SQLDBC_IRuntime *
SQLDBC_ClientRuntimeInit()
{
    sqlonce(&ClientRuntime_Initialized,
            (SQLONCE_InitFuncType)initializeClientRuntime,
            0);

    return ClientRuntime_Instance;
}


//======================================================================
class SQLDBC_SingleThreadedRuntime
    : public SQLDBC_IRuntime
{
public:
    SQLDBC_SingleThreadedRuntime(SQLDBC_ClientRuntime *baseruntime)
    :m_runtime(baseruntime)
    {
    }

    virtual const char *getIdentifier() const
    {
        return "SQLDBC_SingleThreadClientRuntime <MAJOR_VERSION>.<MINOR_VERSION>.<CORRECTION_LEVEL>    "
            "BUILD <BUILD_NUMBER_EX_STRING>";
    }

    virtual SAPDB_Bool checkKeyOption(const char *keyoption,
                                      char *servernode,
                                      SAPDB_Int4& servernodelength,
                                      char *serverdb,
                                      SAPDB_Int4& serverdblength,
                                      SAPDB_Int4& isolationlevel,
                                      SAPDB_Int4& cachelimit,
                                      SAPDB_Int4& sqlmode,
                                      SAPDB_Int4& timeout,
                                      char *username,
                                      SAPDB_Int4& usernamelength,
                                      SQLDBC_StringEncoding& usernameEncoding,
                                      SAPDBErr_MessageList& errorMessages)
    {
        return m_runtime->checkKeyOption(keyoption,
                                         servernode,
                                         servernodelength,
                                         serverdb,
                                         serverdblength,
                                         isolationlevel,
                                         cachelimit,
                                         sqlmode,
                                         timeout,
                                         username,
                                         usernamelength,
                                         usernameEncoding,
                                         errorMessages);
    }

    virtual SAPDBMem_IRawAllocator& getGlobalAllocator()
    {
        return m_runtime->getGlobalAllocator();
    }


    virtual SAPDB_Bool getSession(const char  *connectUrl,
                                  const char  *connectCommand,
                                  const char  *password,
                                  SAPDB_Int4    passwordLength,
                                  const SQLDBC_StringEncoding commandEncoding,
                                  SAPDB_Int8&  sessionID,
                                  SAPDB_UInt4& packetSize,
                                  SAPDB_Int4&  packetListSize,
                                  void       **packetList,
                                  void       **sessionInfoReply,
                                  SAPDBErr_MessageList& errorMessages,
                                  SAPDBMem_IRawAllocator *allocator)
    {
        return m_runtime->getSession(connectUrl,
                                     connectCommand,
                                     password,
                                     passwordLength,
                                     commandEncoding,
                                     sessionID,
                                     packetSize,
                                     packetListSize,
                                     packetList,
                                     sessionInfoReply,
                                     errorMessages,
                                     allocator);
    }

    virtual SAPDB_Bool releaseSession(SAPDB_Int8 sessionID,
                                      SAPDBErr_MessageList& errorMessages)
    {
        return m_runtime->releaseSession(sessionID, errorMessages);
    }

    virtual SAPDB_Bool request(SAPDB_Int8  sessionID,
                               void       *requestData,
                               SAPDB_UInt4 requestDataLength,
                               SAPDBErr_MessageList& errorMessages)
    {
        return m_runtime->request(sessionID, requestData, requestDataLength, errorMessages);
    }

    virtual SAPDB_Bool receive(SAPDB_Int8 sessionID,
                               void **replyData,
                               SAPDB_Int4& replyDataLength,
                               SAPDBErr_MessageList& errorMessages)
    {
        return m_runtime->receive(sessionID, replyData, replyDataLength, errorMessages);
    }

    virtual SAPDB_Bool cancelCurrentCommand(SAPDB_Int8 sessionID,
                                            SAPDBErr_MessageList& errorMessages)
    {
        return cancelCurrentCommand(sessionID, errorMessages);
    }

    virtual SAPDB_Bool createMutex(MutexHandle& mutexHandle,
                                   SAPDBMem_IRawAllocator& allocator,
                                   SAPDBErr_MessageList& errorMessages)
    {
        mutexHandle = (MutexHandle) & m_dummy;
        return true;
    }

    virtual SAPDB_Bool lockMutex(MutexHandle mutexHandle)
    {
        return true;
    }

    virtual SAPDB_Bool releaseMutex(MutexHandle mutexHandle)
    {
        return true;
    }

    virtual SAPDB_Bool destroyMutex(MutexHandle& mutexHandle,
                                    SAPDBMem_IRawAllocator& allocator,
                                    SAPDBErr_MessageList& errorMessages)
    {
        return true;
    }


    virtual SAPDB_Bool  createCounter(CounterHandle& counterHandle,
                                      SAPDBMem_IRawAllocator& allocator,
                                      SAPDBErr_MessageList& errorMessages)
    {
        SAPDB_UInt4 *p = (SAPDB_UInt4 *)allocator.Allocate(sizeof(SAPDB_UInt4));
        *p = 0;
        counterHandle = (CounterHandle *) p;
        return true;
    }

    virtual SAPDB_UInt4 nextCounter(CounterHandle counterHandle)
    {
        SAPDB_UInt4 *p = (SAPDB_UInt4*) counterHandle;
        return (*p)++;
    }

    virtual SAPDB_Bool  destroyCounter(CounterHandle counterHandle,
                                       SAPDBMem_IRawAllocator& allocator,
                                       SAPDBErr_MessageList& errorMessages)
    {
        allocator.Deallocate(counterHandle);
        return true;
    }

    virtual TaskID getCurrentTaskID()
    {
        static tsp00_Int4 pid = -1;
        if(pid == -1) {
            sqlgetpid(&pid);
        }
        return (SQLDBC_IRuntime::TaskID)pid;
    }

    virtual SAPDB_Bool createSemaphore(SemaphoreHandle& semaphoreHandle,
                                       SAPDB_Int4 initialValue,
                                       SAPDBMem_IRawAllocator& allocator,
                                       SAPDBErr_MessageList& errorMessages)
    {
        semaphoreHandle = (SemaphoreHandle) &m_dummy;
        return true;
    }

    virtual SAPDB_Bool waitSemaphore(SemaphoreHandle semaphoreHandle)
    {
        return true;
    }

    virtual SAPDB_Bool signalSemaphore(SemaphoreHandle semaphoreHandle)
    {
        return true;
    }

    virtual SAPDB_Bool destroySemaphore(SemaphoreHandle& semaphoreHandle,
                                        SAPDBMem_IRawAllocator& allocator,
                                        SAPDBErr_MessageList& errorMessages)
    {
        return true;
    }

    virtual TaskTraceContext* getTaskTraceContext()
    {
        return &m_runtime->m_traceoptions;
    }

    virtual void write(const char *s, SAPDB_Int4 size)
    {
        m_runtime->write_singlethreaded(s, size);
    }

    virtual void writeln(const char *s, SAPDB_Int4 size)
    {
        m_runtime->writeln_singlethreaded(s, size);
    }

    virtual void updateTraceFlags(SAPDB_Bool& traceEnabled)
    {
        m_runtime->updateTraceFlags(traceEnabled);
    }

private:
    SQLDBC_ClientRuntime   *m_runtime;
    IFR_Int4                m_dummy;
};





typedef SQLDBC_IRuntime *(*ClientRuntimeInitProc)();

SQLDBC_DLLEXPORT SQLDBC_IRuntime *SQLDBC::GetClientRuntime(char *errorText, const SQLDBC_Int4 errorTextSize )
{
  return SQLDBC_ClientRuntimeInit();
}


static SQLDBC_SingleThreadedRuntime *singlethreaded_runtime = 0;

SAPDBMEM_STATIC_RAW_ALLOCATE(singlethreaded_runtime_instance, sizeof(SQLDBC_SingleThreadedRuntime));

SQLDBC_DLLEXPORT SQLDBC_IRuntime *SQLDBC::GetSingleThreadClientRuntime(char *errorText, const SQLDBC_Int4 errorTextSize )
{
    if(singlethreaded_runtime == 0) {
        SQLDBC_ClientRuntime *tmp = (SQLDBC_ClientRuntime *) ::SQLDBC::GetClientRuntime(errorText, errorTextSize);
        if(tmp == 0) {
            return 0;
        }
        void *p = (void *) singlethreaded_runtime_instance;
        singlethreaded_runtime = new (p) SQLDBC_SingleThreadedRuntime(tmp);
    }
    return singlethreaded_runtime;
}

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