src/iodbc/dlproc.c

   1 /** Load driver and resolve driver's function entry point
   2
   3     Copyright (C) 1995 by Ke Jin <kejin@empress.com>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14 **/
  15
  16
  17 #include        <../iodbc/iodbc.h>
  18
  19 #include        <../iodbc/isql.h>
  20 #include        <../iodbc/isqlext.h>
  21
  22 #include        <../iodbc/dlproc.h>
  23
  24 #include        <../iodbc/herr.h>
  25 #include        <../iodbc/henv.h>
  26 #include        <../iodbc/hdbc.h>
  27
  28 #include        <../iodbc/itrace.h>
  29
  30 #include        "../iodbc/henv.ci"
  31
  32 HPROC   _iodbcdm_getproc( HDBC hdbc, int idx )
  33 {
  34         DBC_t FAR*      pdbc    = (DBC_t FAR*)hdbc;
  35         ENV_t FAR*      penv;
  36         HDLL            hdll;
  37  static HPROC FAR*      phproc;
  38
  39         if( idx <= 0 || idx > SQL_EXT_API_LAST )
  40         /* first entry never used */
  41         {
  42                 return SQL_NULL_HPROC;
  43         }
  44
  45         penv = (ENV_t FAR*)(pdbc->henv);
  46
  47         if( penv == NULL )
  48         {
  49                 return SQL_NULL_HPROC;
  50         }
  51
  52         phproc = penv->dllproc_tab + idx;
  53
  54         if( *phproc == SQL_NULL_HPROC )
  55         {
  56                 int     i, en_idx;
  57
  58                 for( i=0 ; ; i++ )
  59                 {
  60                         en_idx = odbcapi_symtab[i].en_idx;
  61
  62                         if( en_idx == en_NullProc )
  63                         {
  64                                 break;
  65                         }
  66
  67                         if( en_idx == idx )
  68                         {
  69                                 *phproc = _iodbcdm_dllproc( penv->hdll,
  70                                         odbcapi_symtab[i].symbol );
  71
  72                                 break;
  73                         }
  74                 }
  75         }
  76
  77         return *phproc;
  78 }
  79
  80 HDLL    _iodbcdm_dllopen( char FAR* path )
  81 {
  82         return  (HDLL)DLL_OPEN( path );
  83 }
  84
  85 HPROC   _iodbcdm_dllproc( HDLL hdll, char FAR* sym )
  86 {
  87         return (HPROC)DLL_PROC( hdll, sym );
  88 }
  89
  90 int     _iodbcdm_dllclose( HDLL hdll )
  91 {
  92         DLL_CLOSE( hdll );
  93
  94         return 0;
  95 }
  96
  97 char*   _iodbcdm_dllerror( )
  98 {
  99         return DLL_ERROR();
 100 }