sics/scanvar.c

/*-----------------------------------------------------------------------
  Implementation file for the SICS ScanVariable. This is a support module 
  for the SICS scan system.

  Evolved during refactoring scan in November 2004
  
  copyright: see file COPYRIGHT

  Mark Koennecke, November 2004
-------------------------------------------------------------------------*/
#include <stdio.h>
#include <assert.h>
#include "fortify.h"
#include "sics.h"
#include "scanvar.h"
#include "lld.h"
#include "devexec.h"
/*----------------------------------------------------------------------*/
pVarEntry MakeScanVar(SicsInterp *pSics, SConnection *pCon, char
		      *name, float start, float step){
  CommandList *pCom = NULL;
  pIDrivable  pDriv = NULL;
  pDummy      pData = NULL;
  pVarEntry    pVar = NULL;
  char pBueffel[512];

  /*
    allocate space
  */
  pVar = (pVarEntry)malloc(sizeof(VarEntry));
  if(pVar == NULL){
    SCWrite(pCon,"ERROR: out of memory allocating scan variable",eError);
    return NULL;
  }
  memset(pVar,0,sizeof(VarEntry));

  /* find the thing */
  pCom = FindCommand(pSics,name);
  if(!pCom){
    snprintf(pBueffel,511,"ERROR: Cannot find variable %s to scan",name);
    SCWrite(pCon,pBueffel,eError);
    return NULL;
  }
  pData = (pDummy)pCom->pData;
  if(!pData){
    snprintf(pBueffel,511,"ERROR: Cannot find data for variable %s",name);
    SCWrite(pCon,pBueffel,eError);
    return NULL;
  }
  pDriv = pData->pDescriptor->GetInterface(pData,DRIVEID);
  if(!pDriv){
    snprintf(pBueffel,511,
       "ERROR: variable %s is NOT driveable and cannot be scanned",name);
    SCWrite(pCon,pBueffel,eError);
        return NULL;
  }

  /* got everything, fill in the VarEntry structure */
  strcpy(pVar->Name,name);
  pVar->pInter = pDriv;
  pVar->pObject = pData;
  pVar->fStart = start;
  pVar->fStep =  step;
  pVar->dataList = LLDcreate(sizeof(float));

  return pVar;
}
/*------------------------------------------------------------------*/
void InitScanVar(pVarEntry pVar){
  LLDdelete(pVar->dataList);
  pVar->dataList = LLDcreate(sizeof(float));
}
/*--------------------------------------------------------------------*/
void DeleteVarEntry(void *pData){
  pVarEntry pVar = NULL;
     
  pVar = (pVarEntry)pData;
     
  if(pVar == NULL){
    return;
  }
     
  if(pVar->fData){
    free(pVar->fData);
  }
  LLDdelete(pVar->dataList);
  free(pVar);
}
/*------------------------------------------------------------------------*/
char *ScanVarName(pVarEntry pVar){
  return pVar->Name;
}
/*------------------------------------------------------------------------*/
float ScanVarStart(pVarEntry pVar){
  return pVar->fStart;
}
/*-------------------------------------------------------------------------*/
float ScanVarStep(pVarEntry pVar){
  return pVar->fStep;
}
/*------------------------------------------------------------------------*/
int StartScanVar(pVarEntry pVar, SConnection *pCon, int i){
  float fVal;
  pDummy pDum;
  char pBueffel[512];
  int status;

  pDum = (pDummy)pVar->pObject;
  fVal = pVar->fStart +  i * pVar->fStep;
  status = StartDevice(pServ->pExecutor, 
		       pVar->Name,
		       pDum->pDescriptor,
		       pVar->pObject,
		       pCon,
		       fVal); 
  if(!status){
    snprintf(pBueffel,511,"ERROR: Failed to start %s",pVar->Name);
    SCWrite(pCon,pBueffel,eError);
    return 0;
  }                                                    

  return 1;
}
/*-------------------------------------------------------------------------*/
void AppendScanVar(pVarEntry pVar, float pos){
  float fVal = pos;
  LLDnodeAppendFrom(pVar->dataList,&fVal);
}
/*------------------------------------------------------------------------*/
float GetScanVarPos(pVarEntry pVar, int i){
  int count = 0, status;

  status = LLDnodePtr2First(pVar->dataList);
  while(count < i && (status = LLDnodePtr2Next(pVar->dataList)) != 0){
    count++;
  }
  if(count == i){
    return LLDnodeFloat(pVar->dataList);
  } else {
    return -99999.99;
  }
}
/*------------------------------------------------------------------------*/
void CopyScanVar(pVarEntry pVar, float *fData, int np){
  int i, count = 0, status;

  status = LLDnodePtr2First(pVar->dataList);
  while(status > 0 && count < np){
    fData[count] = LLDnodeFloat(pVar->dataList);
    count++;
    status = LLDnodePtr2Next(pVar->dataList);
  }
}