Re: [Dev-C++] Struckts and pointer .......

[<Met...@ao...>]

mu...@gm... wrote :

> In what you do here, you're overwriting the pointer to the memory allocated,
> causing a memory leak.

Yes indeed !

In fact, I was thinking of one of my program I am currently developping. It 
makes intensive use of chained lists like this :

typedef struct _coldesc
{
  SQLCHAR ColumnName[255];
  SQLSMALLINT NameLength;
  SQLSMALLINT DataType;
  SQLUINTEGER ColumnSize;
  SQLSMALLINT DecimalDigits;
  SQLSMALLINT Nullable;
  TCHAR *buffer;
  SQLLEN IndPtr;
  struct _coldesc *next;
}; 

_coldesc *thisbinding=NULL;
_coldesc *firstbinding=NULL;
_coldesc *nextbinding=NULL;

firstbinding=(_coldesc*)malloc(sizeof(_coldesc));
thisbinding=firstbinding;

**Do calls to SQLDescribeCol here**

nextbinding=(_coldesc*)malloc(sizeof(_coldesc));
thisbinding->next=nextbinding;
thisbinding=thisbinding->next;

Sorry for the misunderstanding ! This small code example shows better what I 
was trying to tell.

--

Seb