compiler/alib/getrexxvar.c

   1 /*
   2         Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6     Lang: english
   7 */
   8 #include <proto/alib.h>
   9 #include <proto/exec.h>
  10 #include <proto/rexxsyslib.h>
  11 #include <rexx/storage.h>
  12 #include <rexx/errors.h>
  13
  14 #include <string.h>
  15
  16 /*****************************************************************************
  17
  18     NAME */
  19         LONG GetRexxVar(
  20
  21 /*  SYNOPSIS */
  22         struct RexxMsg *msg,
  23         CONST_STRPTR varname,
  24         char **value)
  25
  26 /*  FUNCTION
  27         Get a the value of the name rexx variable.
  28
  29     INPUTS
  30         msg - A rexx message generated from a running rexx script
  31         varname - The name of the variable to get the value from
  32         value - a pointer to a string pointer that will be filled with
  33                 a pointer to the value of the variable. This value
  34                 not be changed. On AROS this pointer will also be an
  35                 argstring so you can get the length with LengthArgstring.
  36         length - the length of the value argument
  37
  38     RESULT
  39         0 when succes, otherwise a rexx error value is returned.
  40
  41     NOTES
  42         On AROS the pointer returned in value is only valid until the next
  43         getrexxvar call on the same running script.
  44
  45     EXAMPLE
  46
  47     BUGS
  48
  49     SEE ALSO
  50         CheckRexxMsg(), GetRexxVar()
  51
  52     INTERNALS
  53         This function creates a rexx message that is sent to the AREXX
  54         port with a RXSETVAR command.
  55
  56
  57 *****************************************************************************/
  58 {
  59     struct Library *RexxSysBase = NULL;
  60     struct RexxMsg *msg2 = NULL, *msg3;
  61     struct MsgPort *port = NULL, *rexxport;
  62     LONG retval = ERR10_003;
  63
  64     RexxSysBase = OpenLibrary("rexxsyslib.library", 0);
  65     if (RexxSysBase==NULL) goto cleanup;
  66
  67     if (!IsRexxMsg(msg))
  68     {
  69         retval = ERR10_010;
  70         goto cleanup;
  71     }
  72
  73     rexxport = FindPort("REXX");
  74     if (rexxport==NULL)
  75     {
  76         retval = ERR10_013;
  77         goto cleanup;
  78     }
  79
  80     port = CreateMsgPort();
  81     if (port == NULL) goto cleanup;
  82     msg2 = CreateRexxMsg(port, NULL, NULL);
  83     if (msg2==NULL) goto cleanup;
  84     msg2->rm_Private1 = msg->rm_Private1;
  85     msg2->rm_Private2 = msg->rm_Private2;
  86     msg2->rm_Action = RXGETVAR | 1;
  87     msg2->rm_Args[0] = (IPTR)CreateArgstring(varname, strlen(varname));
  88     if (msg2->rm_Args[0]==0) goto cleanup;
  89
  90     PutMsg(rexxport, (struct Message *)msg2);
  91     msg3 = NULL;
  92     while (msg3!=msg2)
  93     {
  94         WaitPort(port);
  95         msg3 = (struct RexxMsg *)GetMsg(port);
  96         if (msg3!=msg2) ReplyMsg((struct Message *)msg3);
  97     }
  98
  99     if (msg3->rm_Result1==RC_OK)
 100     {
 101         *value = (char *)msg3->rm_Result2;
 102         retval = RC_OK;
 103     }
 104     else retval = (LONG)msg3->rm_Result2;
 105
 106 cleanup:
 107     if (msg2!=NULL)
 108     {
 109         if (msg2->rm_Args[0]!=0) DeleteArgstring((UBYTE *)msg2->rm_Args[0]);
 110         DeleteRexxMsg(msg2);
 111     }
 112     if (port!=NULL) DeletePort(port);
 113     if (RexxSysBase!=NULL) CloseLibrary(RexxSysBase);
 114
 115     return retval;
 116 } /* SetRexxVar */