369 lines
16 KiB
C
369 lines
16 KiB
C
/*----------------------------------------------------------------------------*/
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/* */
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/* Copyright (c) 1995, 2004 IBM Corporation. All rights reserved. */
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/* Copyright (c) 2005-2021 Rexx Language Association. All rights reserved. */
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/* */
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/* This program and the accompanying materials are made available under */
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/* the terms of the Common Public License v1.0 which accompanies this */
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/* distribution. A copy is also available at the following address: */
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/* https://www.oorexx.org/license.html */
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/* */
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/* Redistribution and use in source and binary forms, with or */
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/* without modification, are permitted provided that the following */
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/* conditions are met: */
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/* */
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/* Redistributions of source code must retain the above copyright */
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/* notice, this list of conditions and the following disclaimer. */
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/* Redistributions in binary form must reproduce the above copyright */
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/* notice, this list of conditions and the following disclaimer in */
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/* the documentation and/or other materials provided with the distribution. */
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/* */
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/* Neither the name of Rexx Language Association nor the names */
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/* of its contributors may be used to endorse or promote products */
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/* derived from this software without specific prior written permission. */
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/* */
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/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
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/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
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/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS */
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/* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT */
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/* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */
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/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED */
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/* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, */
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/* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY */
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/* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING */
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/* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS */
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/* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
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/* */
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/*----------------------------------------------------------------------------*/
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/***************************************************************************/
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/* */
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/* rexxapi3.c Open Object Rexx samples */
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/* */
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/* ----------------------------------------------------------------------- */
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/* */
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/* Description: functions used by Open Object Rexx script */
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/* */
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/***************************************************************************/
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <rexx.h>
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/*********************************************************************/
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/* Numeric Return calls */
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/*********************************************************************/
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#define INVALID_ROUTINE 40 /* Raise Rexx error */
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#define VALID_ROUTINE 0 /* Successful completion */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*********************************************************************/
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/* ApiFncTable */
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/* Array of names of the REXXAPI functions. */
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/* This list is used for registration and deregistration. */
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/*********************************************************************/
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static const char *ApiFncTable[] =
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{
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"Api_Exchange_Data",
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"ApiDeregFunc3",
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"Api_Read_All_Variables_From_REXX_VP",
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"Api_Read_All_Elements_Of_A_Specific_Stem_From_REXX_VP"
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};
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/*************************************************************************
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* Function: ApiLoadFuncs *
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* *
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* Syntax: call ApiLoadFuncs *
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* *
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* Params: none *
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* *
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* Return: null string *
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*************************************************************************/
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RexxReturnCode REXXENTRY ApiLoadFuncs3(
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const char *name, /* Function name */
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size_t numargs, /* Number of arguments */
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CONSTRXSTRING args[], /* Argument array */
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const char * queuename, /* Current queue */
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PRXSTRING retstr ) /* Return RXSTRING */
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{
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int entries; /* Num of entries */
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int j; /* Counter */
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entries = sizeof(ApiFncTable)/sizeof(const char *);
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for (j = 0; j < entries; j++)
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{
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RexxRegisterFunctionDll(ApiFncTable[j], "rexxapi3", ApiFncTable[j]);
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}
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return VALID_ROUTINE;
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}
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/*************************************************************************
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* Function: ApiDeregFunc *
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* *
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* Syntax: call ApiDeregFuncs *
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* *
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* Params: none *
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* *
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* Return: null string *
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*************************************************************************/
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RexxReturnCode REXXENTRY ApiDeregFunc3(
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const char *name, /* Function name */
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size_t numargs, /* Number of arguments */
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CONSTRXSTRING args[], /* Argument array */
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const char * queuename, /* Current queue */
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PRXSTRING retstr ) /* Return RXSTRING */
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{
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int entries; /* Num of entries */
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int j; /* Counter */
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retstr->strlength = 0; /* set return value */
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if (numargs > 0)
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return INVALID_ROUTINE;
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entries = sizeof(ApiFncTable)/sizeof(const char *);
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for (j = 0; j < entries; j++)
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{
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RexxDeregisterFunction(ApiFncTable[j]);
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}
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return VALID_ROUTINE;
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}
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/*************************************************************************
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* Function: Api_Read_All_Variables_From_REXX_VP *
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* *
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* Syntax: call Api_Read_All_Variables_From_REXX_VP *
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* *
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* Params: No parameter required. The function is called by APITEST. *
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* It uses a while loop to read all the variables in the active*
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* REXX-variable pool. The shared variable block request code *
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* is RXSHV_NEXTV. Be aware that with this request code REXX *
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* treads every Stem variable as a variable itself (not the *
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* whole stem). This gives the calling C-routine a chance *
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* to clear up memory which was previously allocated by REXX *
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* for every returned variable. If you don't free memory the *
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* system will get out of storage. *
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* Be aware that the returned variables are NOT in any spe- *
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* cified order. *
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* Return: 0 - success, 1 - failure *
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*************************************************************************/
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RexxReturnCode REXXENTRY Api_Read_All_Variables_From_REXX_VP(
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const char *name, /* Function name */
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size_t numargs, /* Number of arguments */
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CONSTRXSTRING args[], /* Argument array */
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const char * queuename, /* Current queue */
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PRXSTRING retstr ) /* Return RXSTRING */
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{
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SHVBLOCK *prxshv;
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RexxReturnCode rc;
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int i = 1;
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strcpy(retstr->strptr, "0");
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retstr->strlength = strlen(retstr->strptr);
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prxshv = (PSHVBLOCK)malloc(sizeof(SHVBLOCK));
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if (!prxshv)
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{
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strcpy(retstr->strptr, "Allocation error occured");
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retstr->strlength = strlen(retstr->strptr);
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return VALID_ROUTINE;
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}
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prxshv->shvnext = NULL;
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prxshv->shvname.strlength = 0;
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prxshv->shvname.strptr = NULL;
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prxshv->shvvalue.strptr = NULL; /*** let Rexx allocate for me ***/
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prxshv->shvcode = RXSHV_NEXTV;
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/* Now reading all variables from the Rexx-variable pool ***********/
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rc = RexxVariablePool(prxshv);
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if (rc)
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{
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if (rc != RXSHV_LVAR)
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{
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printf("ERROR: shvret is %x hex after var nr. %d \n",rc,i);
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}
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}
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printf("Name of the variable from the Variable Pool: %s, Value: %s \n", prxshv->shvname.strptr, prxshv->shvvalue.strptr);
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i++;
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while (!prxshv->shvret)
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{
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prxshv->shvnext = (PSHVBLOCK)malloc(sizeof(SHVBLOCK));
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prxshv = prxshv->shvnext;
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if (!prxshv)
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{
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strcpy(retstr->strptr, "Allocation error occured");
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retstr->strlength = strlen(retstr->strptr);
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return VALID_ROUTINE;
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}
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prxshv->shvnext = NULL;
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prxshv->shvname.strlength = 0;
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prxshv->shvname.strptr = NULL;
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prxshv->shvvalue.strptr = NULL; /*** let Rexx allocate for me ***/
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prxshv->shvcode = RXSHV_NEXTV;
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rc = RexxVariablePool(prxshv);
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if (rc)
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{
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if (rc== RXSHV_MEMFL)
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{
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strcpy(retstr->strptr, "Allocation error occured");
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retstr->strlength = strlen(retstr->strptr);
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return VALID_ROUTINE;
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}
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else if (rc != RXSHV_LVAR)
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{
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printf("ERROR: shvret is %x hex after var nr. %d\n",rc,i);
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return INVALID_ROUTINE;
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}
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}
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i++;
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printf("Name of the variable from the Variable Pool: %s, Value: %s \n", prxshv->shvname.strptr, prxshv->shvvalue.strptr);
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RexxFreeMemory((void *)prxshv->shvname.strptr);
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RexxFreeMemory((void *)prxshv->shvvalue.strptr);
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}
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return VALID_ROUTINE;
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}
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/*************************************************************************
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* Function: Api_Read_All_Elements_Of_A_Specific_Stem_From_REXX_VP *
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* *
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* Syntax: call Api_Read_All_Elements_Of_A_Specific_Stem_From_REXX_VP *
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* with the stem variable the values should be returned *
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* *
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* Params: A stem where all values of the stem variables should be *
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returned. *
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* The shared variable block request code is RXSHV_SYFET. *
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* Only ONE call is necessary. If the stem contains to many *
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* variables the memory resources are exhausted and Rexx *
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* should return RXSHV_MEMFL. There is no change for the *
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* calling routine to handle the problem with DosFreeMem *
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* because it doesn't get any control before Rexx terminates. *
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* The problem is during allocating memory for the values of *
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* the stem-variables by DosAllocMem which allocates on 64k *
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* boundary. *
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* Return: 0 - success, 1 - failure *
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*************************************************************************/
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RexxReturnCode REXXENTRY Api_Read_All_Elements_Of_A_Specific_Stem_From_REXX_VP(
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const char *name, /* Function name */
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size_t numargs, /* Number of arguments */
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CONSTRXSTRING args[], /* Argument array */
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const char * queuename, /* Current queue */
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PRXSTRING retstr ) /* Return RXSTRING */
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{
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SHVBLOCK *prxshv, *temp, *interim, rxshv;
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RexxReturnCode rc;
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char array[20], value[11];
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char *pch, *result;
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int chars;
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int j, k = 0;
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prxshv = &rxshv;
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if (numargs != 1 ) /* validate arg count */
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return INVALID_ROUTINE;
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strcpy(retstr->strptr, "0");
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retstr->strlength = strlen(retstr->strptr);
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pch = (char *) malloc(strlen(args[0].strptr) +1);
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strcpy(pch, args[0].strptr);
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prxshv->shvnext = NULL;
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prxshv->shvname.strlength = strlen(pch);
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prxshv->shvname.strptr = pch;
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prxshv->shvvalue.strptr = NULL; /*** let Rexx allocate for me ***/
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prxshv->shvcode = RXSHV_SYFET;
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rc = RexxVariablePool(prxshv);
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if (rc)
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{
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strcpy(retstr->strptr, "APIFETCH failed \n");
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retstr->strlength = strlen(retstr->strptr);
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return VALID_ROUTINE;
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}
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j = atoi(prxshv->shvvalue.strptr);
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chars = '.';
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result = strrchr(pch, chars);
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result++;
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*result = 0x00;
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temp = prxshv;
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memset(array, 0x00, sizeof(array));
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memset(value, 0x00, sizeof(value));
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for (k = 1;k <= j; k++)
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{
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temp->shvnext = (PSHVBLOCK)malloc(sizeof(SHVBLOCK));
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temp = temp->shvnext;
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if (!temp)
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{
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strcpy(retstr->strptr, "Allocation error occured");
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retstr->strlength = strlen(retstr->strptr);
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return VALID_ROUTINE;
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}
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strcpy(array, pch);
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sprintf(value, "%d", k);
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strcat(array, value);
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temp->shvnext = NULL;
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temp->shvname.strlength = strlen(array);
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temp->shvname.strptr = (char *) malloc(strlen(array)+1);
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strcpy((char *)temp->shvname.strptr, array);
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temp->shvvalue.strptr = NULL; /*** let Rexx allocate for me ***/
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temp->shvcode = RXSHV_SYFET;
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}
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rc = RexxVariablePool(prxshv->shvnext);
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if (rc)
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{
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if (rc== RXSHV_MEMFL)
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{
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strcpy(retstr->strptr, "Allocation error occured");
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retstr->strlength = strlen(retstr->strptr);
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return VALID_ROUTINE;
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}
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else if (rc != RXSHV_LVAR)
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{
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printf("ERROR: shvret is %x hex \n",rc);
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return INVALID_ROUTINE;
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}
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}
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temp = prxshv->shvnext;
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for (k = 1;k <= j; k++)
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{
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printf("Name of the Stem-variable from the Rexx Variable Pool: %s, Value: %s \n", temp->shvname.strptr, temp->shvvalue.strptr);
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interim = temp;
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RexxFreeMemory((void *)temp->shvname.strptr);
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RexxFreeMemory((void *)temp->shvvalue.strptr);
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temp = temp->shvnext;
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free(interim);
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}
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RexxFreeMemory((void *)prxshv->shvvalue.strptr);
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free(pch);
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return VALID_ROUTINE;
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}
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#ifdef __cplusplus
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}
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#endif
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