Hi,
I have done a fonction that rread data from DataBase. Ininiatialized an array of 3 D char (2D array of string) . I having problem to free this array after using "DBGetVariantArrayValue". I get the message :
NON-FATAL RUN-TIME ERROR: "SQLServerDB.c", line 151, col 13, thread id 0x00001E0C: Attempt to free pointer to memory not allocated by malloc() or calloc().
But If I free array of char just after malloc is working well !!
int hstmt = 0; /* Handle to SQL statement */
int resCode; /* Result code */
int i=0,j=0,
numLine=0,
numCol=0;
VARIANT *cArray;
char szFinalQuery[512]="";
char ***ArrOfStr ;
//**** Get data from DB ****
//Disable error
DisableBreakOnLibraryErrors ();
//Send query to SQL server DB
Fmt(szFinalQuery,"%s %s", szQuery, szDBTableName);
hstmt = DBActivateSQL (hdbc, szFinalQuery);
//Get result from DB
resCode = DBGetVariantArray (hstmt, &cArray,&numLine, &numCol);
//3 D array of char // 2D array of string allocation of memory
ArrOfStr = (char***)malloc(numCol * sizeof(char**));
for(i=0; i<numCol; i++){
ArrOfStr[i]= (char**)malloc(numLine * sizeof(char*));
for (j=0;j<numLine;j++) {
ArrOfStr[i][j]= (char*)malloc(MAXCHAR);
}
}
//Fill out 2D array of string with data from DB
for (i = 0; i < numLine; i++) {
for (j = 0; j < numCol; j++) {
resCode = DBGetVariantArrayValue (cArray, numLine, numCol, CAVT_CSTRING, i, j, &ArrOfStr[j][i]);
// Null terminering character if data = NULL
if (resCode == DB_NULL_DATA){
Fmt(ArrOfStr[j][i],"");
}
}
}
//Frees the variant array that DBGetVariantArray returned.
resCode = DBFreeVariantArray (cArray, 1, numLine, numCol);
//Deactivate SQL //free ressources
DBDeactivateSQL (hdbc);
//Free 3D array of char
for(i=0; i<numCol; i++){
for (j=0;j<numLine;j++) {
free (ArrOfStr[i][j]); // GET ERROR HERE !!!
}
free(ArrOfStr[i]);
}
free (ArrOfStr);
