don't give error messages if ws2_32.dll is not available in wxGetHostName()

[wxWidgets.git] / src / iodbc / herr.c

diff --git a/src/iodbc/herr.c b/src/iodbc/herr.c
index cffbddae659bf73c54726786dee8aa0dc6a3aa3b..ad9ba81e877654b3099ecdd980fde97c4cb21dcb 100644 (file)
--- a/src/iodbc/herr.c
+++ b/src/iodbc/herr.c
@@ -1,364 +1,378 @@
-/** Error stack management functions
-  
-    Copyright (C) 1995 by Ke Jin <kejin@empress.com> 
+/*
+ *  herr.c
+ *
+ *  $Id$
+ *
+ *  Error stack management functions
+ *
+ *  The iODBC driver manager.
+ *  
+ *  Copyright (C) 1995 by Ke Jin <kejin@empress.com> 
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public
+ *  License along with this library; if not, write to the Free
+ *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include       "config.h"
+
+#include       "isql.h"
+#include       "isqlext.h"
+
+#include        "dlproc.h"
+
+#include        "herr.h"
+#include       "henv.h"
+#include       "hdbc.h"
+#include       "hstmt.h"
+
+#include       "itrace.h"
+
+#include       "herr.ci"
+
+static HERR 
+_iodbcdm_popsqlerr (HERR herr)
+{
+  sqlerr_t *list = (sqlerr_t *) herr;
+  sqlerr_t *next;

 
 

-    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.
+  if (herr == SQL_NULL_HERR)
+    {
+      return herr;
+    }

 
 

-    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.
-**/
+  next = list->next;

 
 

-#include       <../iodbc/iodbc.h>
+  MEM_FREE (list);

 
 

-#include       <../iodbc/isql.h>
-#include       <../iodbc/isqlext.h>
+  return next;
+}

 
 

-#include        <../iodbc/dlproc.h>

 
 

-#include        <../iodbc/herr.h>
-#include       <../iodbc/henv.h>
-#include       <../iodbc/hdbc.h>
-#include       <../iodbc/hstmt.h>
+void 
+_iodbcdm_freesqlerrlist (HERR herrlist)
+{
+  HERR list;

 
 

-#include       <../iodbc/itrace.h>
+  for (list = herrlist; list != 0;)
+    {
+      list = _iodbcdm_popsqlerr (list);
+    }
+}

 
 

-#include       "../iodbc/herr.ci"

 
 

-static HERR    _iodbcdm_popsqlerr( HERR herr )
+HERR 
+_iodbcdm_pushsqlerr (
+    HERR herr,
+    sqlstcode_t code,
+    char *msg)

 {
 {

-       sqlerr_t*       list = (sqlerr_t*)herr;
-       sqlerr_t*       next;
+  sqlerr_t *ebuf;
+  sqlerr_t *perr = (sqlerr_t *) herr;
+  int idx = 0;

 
 

-       if( herr == SQL_NULL_HERR )
-       {
-               return herr;
-       }
-       
-       next = list->next;
+  if (herr != SQL_NULL_HERR)
+    {
+      idx = perr->idx + 1;
+    }

 
 

-       MEM_FREE (list);
+  if (idx == 64)
+    /* over wirte the top entry to prevent error stack blow out */
+    {
+      perr->code = code;
+      perr->msg = msg;

 
 

-       return next;
-}
+      return herr;
+    }

 
 

-void   _iodbcdm_freesqlerrlist( HERR herrlist )
-{
-       HERR    list;
+  ebuf = (sqlerr_t *) MEM_ALLOC (sizeof (sqlerr_t));

 
 

-       for(list = herrlist; list!= 0; )
-       {
-               list = _iodbcdm_popsqlerr(list);
-       }
+  if (ebuf == NULL)
+    {
+      return NULL;
+    }
+
+  ebuf->msg = msg;
+  ebuf->code = code;
+  ebuf->idx = idx;
+  ebuf->next = (sqlerr_t *) herr;
+
+  return (HERR) ebuf;

 }
 
 }
 

-HERR   _iodbcdm_pushsqlerr ( 
-               HERR            herr,
-               sqlstcode_t     code,
-               char*           msg )
-{
-       sqlerr_t*       ebuf;
-       sqlerr_t*       perr    = (sqlerr_t*)herr;
-       int             idx     = 0;

 
 

-       if(herr != SQL_NULL_HERR )
+static char FAR *
+_iodbcdm_getsqlstate (
+    HERR herr,
+    void FAR * tab)
+{
+  sqlerr_t *perr = (sqlerr_t *) herr;
+  sqlerrmsg_t *ptr;
+
+  if (herr == SQL_NULL_HERR || tab == NULL)
+    {
+      return (char FAR *) NULL;
+    }
+
+  for (ptr = tab;
+      ptr->code != en_sqlstat_total;
+      ptr++)
+    {
+      if (ptr->code == perr->code)

        {
        {

-               idx = perr->idx + 1;
+         return (char FAR *) (ptr->stat);

        }
        }

+    }

 
 

-       if( idx == 64 )         
-       /* over wirte the top entry to prevent error stack blow out */
-       {
-               perr->code = code;
-               perr->msg  = msg;
+  return (char FAR *) NULL;
+}

 
 

-               return herr;
-       }

 
 

-       ebuf = (sqlerr_t*)MEM_ALLOC (sizeof(sqlerr_t)); 
-       
-       if( ebuf == NULL )
+static char FAR *
+_iodbcdm_getsqlerrmsg (
+    HERR herr,
+    void FAR * errtab)
+{
+  sqlerr_t *perr = (sqlerr_t *) herr;
+  sqlerrmsg_t *ptr;
+
+  if (herr == SQL_NULL_HERR)
+    {
+      return NULL;
+    }
+
+  if (perr->msg == NULL && errtab == NULL)
+    {
+      return NULL;
+    }
+
+  if (perr->msg != NULL)
+    {
+      return perr->msg;
+    }
+
+  for (ptr = (sqlerrmsg_t *) errtab;
+      ptr->code != en_sqlstat_total;
+      ptr++)
+    {
+      if (ptr->code == perr->code)

        {
        {

-               return NULL;
+         return (char FAR *) ptr->msg;

        }
        }

+    }

 
 

-       ebuf->msg       = msg;  
-       ebuf->code      = code;
-       ebuf->idx       = idx;
-       ebuf->next      = (sqlerr_t*)herr;
-
-       return (HERR)ebuf;
+  return (char FAR *) NULL;

 }
 
 }
 

-static char FAR*       _iodbcdm_getsqlstate ( 
-                               HERR            herr, 
-                               void FAR*       tab )
+
+RETCODE SQL_API 
+SQLError (
+    HENV henv,
+    HDBC hdbc,
+    HSTMT hstmt,
+    UCHAR FAR * szSqlstate,
+    SDWORD FAR * pfNativeError,
+    UCHAR FAR * szErrorMsg,
+    SWORD cbErrorMsgMax,
+    SWORD FAR * pcbErrorMsg)

 {
 {

-       sqlerr_t*       perr = (sqlerr_t*)herr;
-       sqlerrmsg_t*    ptr;
+  GENV_t FAR *genv = (GENV_t FAR *) henv;
+  DBC_t FAR *pdbc = (DBC_t FAR *) hdbc;
+  STMT_t FAR *pstmt = (STMT_t FAR *) hstmt;
+  HDBC thdbc;

 
 

-       if( herr == SQL_NULL_HERR || tab == NULL )
-       {
-               return (char FAR*)NULL;
-       }
+  HENV dhenv = SQL_NULL_HENV;
+  HDBC dhdbc = SQL_NULL_HDBC;
+  HSTMT dhstmt = SQL_NULL_HSTMT;

 
 

-       for( ptr = tab;
-            ptr->code != en_sqlstat_total;
-            ptr++ )
-       {
-               if(ptr->code == perr->code)
-               {
-                       return (char FAR*)(ptr->stat);
-               }
-       }
+  HERR herr = SQL_NULL_HERR;
+  HPROC hproc = SQL_NULL_HPROC;

 
 

-       return (char FAR*)NULL;
-}
+  char FAR *errmsg = NULL;
+  char FAR *ststr = NULL;

 
 

-static char FAR*       _iodbcdm_getsqlerrmsg(
-                               HERR            herr,
-                               void FAR*       errtab )
-{
-        sqlerr_t*       perr = (sqlerr_t*)herr;
-       sqlerrmsg_t*    ptr;
+  int handle = 0;
+  RETCODE retcode = SQL_SUCCESS;

 
 

-        if( herr == SQL_NULL_HERR )
-        {
-                return NULL;
-        }
+  if (hstmt != SQL_NULL_HSTMT) /* retrive stmt err */
+    {
+      herr = pstmt->herr;
+      thdbc = pstmt->hdbc;

 
 

-       if( perr->msg == NULL && errtab == NULL )
+      if (thdbc == SQL_NULL_HDBC)

        {
        {

-               return NULL;
+         return SQL_INVALID_HANDLE;

        }
        }

-
-       if( perr->msg != NULL )
+      hproc = _iodbcdm_getproc (thdbc, en_Error);
+      dhstmt = pstmt->dhstmt;
+      handle = 3;
+    }
+  else if (hdbc != SQL_NULL_HDBC)      /* retrive dbc err */
+    {
+      herr = pdbc->herr;
+      thdbc = hdbc;
+      if (thdbc == SQL_NULL_HDBC)

        {
        {

-               return perr->msg;
+         return SQL_INVALID_HANDLE;

        }
        }

+      hproc = _iodbcdm_getproc (thdbc, en_Error);
+      dhdbc = pdbc->dhdbc;
+      handle = 2;

 
 

-       for( ptr = (sqlerrmsg_t*)errtab;
-            ptr->code != en_sqlstat_total;
-            ptr++ )
+      if (herr == SQL_NULL_HERR
+         && pdbc->henv == SQL_NULL_HENV)

        {
        {

-               if( ptr->code == perr->code )
-               {
-                       return (char FAR*)ptr->msg;
-               }
+         return SQL_NO_DATA_FOUND;

        }
        }

+    }
+  else if (henv != SQL_NULL_HENV)      /* retrive env err */
+    {
+      herr = genv->herr;

 
 

-       return (char FAR*)NULL;
-}
-
-RETCODE SQL_API        SQLError (
-                       HENV            henv,
-                       HDBC            hdbc,
-                       HSTMT           hstmt,
-                       UCHAR FAR*      szSqlstate,
-                       SDWORD FAR*     pfNativeError,
-                       UCHAR FAR*      szErrorMsg,
-                       SWORD           cbErrorMsgMax,
-                       SWORD FAR*      pcbErrorMsg )
-{
-       GENV_t FAR*     genv    = (GENV_t FAR*) henv;
-       DBC_t  FAR*     pdbc    = (DBC_t FAR*) hdbc;
-       STMT_t FAR*     pstmt   = (STMT_t FAR*)hstmt;
-       HDBC            thdbc;
-
-       HENV            dhenv   = SQL_NULL_HENV;
-       HDBC            dhdbc   = SQL_NULL_HDBC;
-       HSTMT           dhstmt  = SQL_NULL_HSTMT;
+      /* Drivers shouldn't push error message 
+       * on envoriment handle */

 
 

-       HERR            herr    = SQL_NULL_HERR;
-       HPROC           hproc   = SQL_NULL_HPROC;
-
-       char   FAR*     errmsg  = NULL;
-       char   FAR*     ststr   = NULL;
-
-       int             handle  = 0;
-       RETCODE         retcode = SQL_SUCCESS;
-       
-       if( hstmt != SQL_NULL_HSTMT )   /* retrive stmt err */
+      if (herr == SQL_NULL_HERR)

        {
        {

-               herr    = pstmt->herr;
-               thdbc   = pstmt->hdbc;
-
-               if( thdbc == SQL_NULL_HDBC )
-               {
-                       return SQL_INVALID_HANDLE;
-               }       
-               hproc   = _iodbcdm_getproc( thdbc, en_Error );
-               dhstmt  = pstmt->dhstmt;
-               handle  = 3;
+         return SQL_NO_DATA_FOUND;

        }
        }

-       else if( hdbc != SQL_NULL_HDBC )        /* retrive dbc err */
+
+      handle = 1;
+    }
+  else
+    {
+      return SQL_INVALID_HANDLE;
+    }
+
+  if (szErrorMsg != NULL)
+    {
+      if (cbErrorMsgMax < 0
+         || cbErrorMsgMax > SQL_MAX_MESSAGE_LENGTH - 1)

        {
        {

-               herr    = pdbc->herr;
-               thdbc   = hdbc;
-               if( thdbc == SQL_NULL_HDBC )
-               {
-                       return SQL_INVALID_HANDLE;
-               }
-               hproc   = _iodbcdm_getproc( thdbc, en_Error );
-               dhdbc   = pdbc->dhdbc;
-               handle  = 2;
-
-               if( herr == SQL_NULL_HERR
-                && pdbc->henv == SQL_NULL_HENV )
-               {
-                       return SQL_NO_DATA_FOUND;
-               }
+         return SQL_ERROR;
+         /* SQLError() doesn't post error for itself */

        }
        }

-       else if( henv != SQL_NULL_HENV )        /* retrive env err */
+    }
+
+  if (herr == SQL_NULL_HERR)   /* no err on drv mng */
+    {
+      /* call driver */
+      if (hproc == SQL_NULL_HPROC)

        {
        {

-               herr    = genv->herr;
+         PUSHSQLERR (herr, en_IM001);

 
 

-               /* Drivers shouldn't push error message 
-                * on envoriment handle */
+         return SQL_ERROR;
+       }

 
 

-               if( herr == SQL_NULL_HERR )
-               {
-                       return SQL_NO_DATA_FOUND;
-               }
+      CALL_DRIVER (thdbc, retcode, hproc, en_Error,
+         (dhenv, dhdbc, dhstmt, szSqlstate, pfNativeError, szErrorMsg,
+             cbErrorMsgMax, pcbErrorMsg))

 
 

-               handle = 1;
-       }
-       else
-       {
-               return SQL_INVALID_HANDLE;
-       }
+      return retcode;
+    }
+
+  if (szSqlstate != NULL)
+    {
+      int len;

 
 

-       if( szErrorMsg != NULL )
+      /* get sql state  string */
+      ststr = (char FAR *) _iodbcdm_getsqlstate (herr,
+         (void FAR *) sqlerrmsg_tab);
+
+      if (ststr == NULL)

        {
        {

-               if( cbErrorMsgMax < 0
-                || cbErrorMsgMax > SQL_MAX_MESSAGE_LENGTH - 1 )
-               {
-                       return SQL_ERROR;
-                       /* SQLError() doesn't post error for itself */
-               }
+         len = 0;

        }
        }

-
-       if( herr == SQL_NULL_HERR )             /* no err on drv mng */
+      else

        {
        {

-               /* call driver */
-               if( hproc == SQL_NULL_HPROC )
-               {
-                       PUSHSQLERR ( herr, en_IM001 );
-
-                       return SQL_ERROR;
-               }
-
-               CALL_DRIVER ( thdbc, retcode, hproc, en_Error, (
-                               dhenv, dhdbc, dhstmt, 
-                               szSqlstate, pfNativeError, 
-                               szErrorMsg, cbErrorMsgMax, pcbErrorMsg) )
-
-#if 0
-               retcode = hproc(dhenv, dhdbc, dhstmt, 
-                               szSqlstate, pfNativeError, 
-                               szErrorMsg, cbErrorMsgMax, pcbErrorMsg);
-#endif
-
-               return retcode;
+         len = (int) STRLEN (ststr);

        }
 
        }
 

-       if( szSqlstate != NULL )
+      STRNCPY (szSqlstate, ststr, len);
+      szSqlstate[len] = 0;
+      /* buffer size of szSqlstate is not checked. Applications
+       * suppose provide enough ( not less than 6 bytes ) buffer
+       * or NULL for it.
+       */
+    }
+
+  if (pfNativeError != NULL)
+    {
+      /* native error code is specific to data source */
+      *pfNativeError = (SDWORD) 0L;
+    }
+
+  if (szErrorMsg == NULL || cbErrorMsgMax == 0)
+    {
+      if (pcbErrorMsg != NULL)

        {
        {

-               int     len;
-
-               /* get sql state  string */
-               ststr = (char FAR*)_iodbcdm_getsqlstate( herr, 
-                               (void FAR*)sqlerrmsg_tab );
-       
-               if( ststr == NULL)
-               {
-                       len = 0;
-               }
-               else
-               {
-                       len = (int)STRLEN(ststr);
-               }
-       
-               STRNCPY ( szSqlstate, ststr, len );
-               szSqlstate[len] = 0;
-               /* buffer size of szSqlstate is not checked. Applications
-                * suppose provide enough ( not less than 6 bytes ) buffer
-                * or NULL for it.
-                */
+         *pcbErrorMsg = (SWORD) 0;

        }
        }

+    }
+  else
+    {
+      int len;
+      char msgbuf[256] = {'\0'};
+
+      /* get sql state message */
+      errmsg = _iodbcdm_getsqlerrmsg (herr, (void FAR *) sqlerrmsg_tab);

 
 

-       if( pfNativeError != NULL )
+      if (errmsg == NULL)

        {
        {

-               /* native error code is specific to data source */
-               *pfNativeError = (SDWORD)0L;
+         errmsg = (char FAR *) "";

        }
 
        }
 

-       if( szErrorMsg == NULL || cbErrorMsgMax == 0 )
+      sprintf (msgbuf, "%s%s", sqlerrhd, errmsg);
+
+      len = STRLEN (msgbuf);
+
+      if (len < cbErrorMsgMax - 1)

        {
        {

-               if( pcbErrorMsg != NULL )
-               {
-                       *pcbErrorMsg = (SWORD)0;
-               }
+         retcode = SQL_SUCCESS;

        }
        }

-       else
+      else

        {
        {

-               int     len;
-               char    msgbuf[256] = { '\0' };
-
-               /* get sql state message */
-               errmsg = _iodbcdm_getsqlerrmsg(herr, 
-                               (void FAR*)sqlerrmsg_tab);
-
-               if(errmsg == NULL)
-               {
-                       errmsg = (char FAR*)"";
-               }       
-
-               sprintf(msgbuf, "%s%s", sqlerrhd, errmsg); 
-       
-               len = STRLEN( msgbuf );
-
-               if( len < cbErrorMsgMax - 1 )
-               {
-                       retcode = SQL_SUCCESS;
-               }
-               else
-               {
-                       len = cbErrorMsgMax - 1;
-                       retcode = SQL_SUCCESS_WITH_INFO;
-                       /* and not posts error for itself */
-               }
-
-               STRNCPY((char*)szErrorMsg, msgbuf, len);
-               szErrorMsg[len] = 0;
-
-               if( pcbErrorMsg != NULL)
-               {
-                       *pcbErrorMsg = (SWORD)len;
-               }
+         len = cbErrorMsgMax - 1;
+         retcode = SQL_SUCCESS_WITH_INFO;
+         /* and not posts error for itself */

        }
 
        }
 

-       switch(handle)          /* free this err */
+      STRNCPY ((char *) szErrorMsg, msgbuf, len);
+      szErrorMsg[len] = 0;
+
+      if (pcbErrorMsg != NULL)

        {
        {

-               case 1:
-                       genv->herr = _iodbcdm_popsqlerr(genv->herr);
-                       break;
+         *pcbErrorMsg = (SWORD) len;
+       }
+    }

 
 

-               case 2:
-                       pdbc->herr = _iodbcdm_popsqlerr(pdbc->herr);
-                       break;
+  switch (handle)              /* free this err */
+     {
+     case 1:
+       genv->herr = _iodbcdm_popsqlerr (genv->herr);
+       break;

 
 

-               case 3: 
-                       pstmt->herr= _iodbcdm_popsqlerr(pstmt->herr);
-                       break;
+     case 2:
+       pdbc->herr = _iodbcdm_popsqlerr (pdbc->herr);
+       break;

 
 

-               default:
-                       break;
-       }
+     case 3:
+       pstmt->herr = _iodbcdm_popsqlerr (pstmt->herr);
+       break;
+
+     default:
+       break;
+     }

 
 

-       return retcode;
+  return retcode;

 }
 }