sics/sicsobj.c

/**
 * This is the header file for the new (as of 2007) style SICS objects 
 * 
 * copyright: see file COPYRIGHT
 * 
 * Mark Koennecke, July 2007
 */
#include <sics.h>
#include "assert.h"
#include "ifile.h"
#include "sicsobj.h"
#include "sicshipadaba.h"
/*--------------------------------------------------------------------------*/
static void DefaultKill(void *data){
    return;
}
/*---------------------------------------------------------------------------*/
pSICSOBJ MakeSICSOBJ(char *name, char *class){
    pSICSOBJ pNew = NULL;
    
    pNew = (pSICSOBJ)malloc(sizeof(SICSOBJ));
    if(pNew == NULL){
        return NULL;
    }
    memset(pNew,0,sizeof(SICSOBJ));
    pNew->pDes = CreateDescriptor(class);
    pNew->objectNode = MakeHipadabaNode(name, HIPNONE, 1);
    if(pNew->pDes == NULL || pNew->objectNode == NULL){
        free(pNew);
        return(NULL);
    }
    pNew->pDes->parNode = pNew->objectNode;
    pNew->KillPrivate = DefaultKill;
    return pNew;   
}
/*---------------------------------------------------------------------------*/
void KillSICSOBJ(void *data){
    pSICSOBJ self = (pSICSOBJ)data;
    if(self == NULL){
        return;
    }
    if(self->pDes != NULL){
        DeleteDescriptor(self->pDes);
    }
    if(self->KillPrivate != NULL && self->pPrivate != NULL){
        self->KillPrivate(self->pPrivate);
    }
    free(self);
}
/*===========================================================================*/
static int assignPar(pHdb node, SConnection *pCon, char *data){
    char error[132], buffer[256];
    int status;
    
    status = readHdbValue(&node->value,data, error, 132);
    if(status != 1){
        snprintf(buffer,255,"ERROR: error parsing %s: %s", 
            node->name, error);
         SCWrite(pCon,buffer,eError);
         return 0;
    }
    return 1;
}
/*---------------------------------------------------------------------------*/
static int invokeOBJFunction(pSICSOBJ object, pHdb commandNode, SConnection *pCon, 
    int argc, char *argv[]){
        int status, i, count = 0;
        pHdb currentPar = NULL;
        SICSOBJFunc pFunc = NULL;
        pHdb parArray[64];

        /*
         * assign parameters and fill parameter array for function at the same 
         * time. Be lenient about missing parameters: Then the old values will
         * be used.
         */
        for(i = 0, currentPar = commandNode->child; 
            i < argc && currentPar != NULL; 
            i++, currentPar = currentPar->next){
                if(argv[i] != NULL){
                    status = assignPar(currentPar,pCon, argv[i]);
                }
                if(status != 1){
                    return status;
                }
                parArray[i] = currentPar;
                count++;
        }
        
        pFunc = (SICSOBJFunc)commandNode->value.v.obj;
        if(pFunc == NULL){
            SCWrite(pCon,"ERROR: internal error, function not found",eError);
            return 0;
        }
        status = pFunc(object, pCon, parArray,count);
        return status;
}
/*---------------------------------------------------------------------------*/
int InvokeSICSOBJ(SConnection *pCon, SicsInterp *pSics, void *pData, 
    int argc, char *argv[]){
    pSICSOBJ self = NULL;
    int status;
    pHdb parNode;
    char buffer[132];
    
    self = (pSICSOBJ)pData;
    assert(self != NULL);
    
    if(argc < 1){
        SCWrite(pCon,"ERROR: Nothing to process",eError);
        return -1; 
    }
    parNode = GetHipadabaNode(self->objectNode,argv[1]);
    if(parNode != NULL && parNode->value.dataType == HIPFUNC){
        status = invokeOBJFunction(self, parNode, pCon, argc-2, &argv[2]);
    } else {
        status = ProcessSICSHdbPar(self->objectNode,pCon, argv[0], 
            argc-1,&argv[1]);
    }
    if(status == -1){
        snprintf(buffer,131,"ERROR: no command or parameter found for key: %s", 
            argv[1]);
        SCWrite(pCon,buffer,eError);
        status = 0;
    }    
        
    return status;        
}
/*---------------------------------------------------------------------------*/
pSICSOBJ SetupSICSOBJ(SConnection *pCon,SicsInterp *pSics, void *pData, 
    int argc, char *argv[]){
        pSICSOBJ pNew = NULL;
        int status;
        
        if(argc < 3){
            SCWrite(pCon,"ERROR: not enough arguments to InstallSICSOBJ",eError);
            return NULL;
        }
        pNew = MakeSICSOBJ(argv[1], argv[2]);
        if(pNew == NULL){
            SCWrite(pCon,"ERROR: out of memory creating new SICS object",eError);
            return NULL;
        }
        status = AddCommand(pSics,
                            argv[1],
                            InvokeSICSOBJ,
                            KillSICSOBJ,
                            pNew);
        if(status != 1){
            KillSICSOBJ(pNew);
            SCPrintf(pCon,eError,"ERROR: failed create duplicate command %s", argv[1]);
            return NULL;
        }
        return pNew;
 }
/*---------------------------------------------------------------------------*/
int InstallSICSOBJ(SConnection *pCon,SicsInterp *pSics, void *pData, 
    int argc, char *argv[]){
        pSICSOBJ pNew = NULL;
        
        pNew = SetupSICSOBJ(pCon, pSics, pData, argc, argv);
        if(pNew == NULL){
            return 0;
        } else {
            return 1;
        }
}