realloc / g_realloc woes..

I currently have the following structure;

typedef struct GnoclOption_

{

const char *optName;

enum GnoclOptionType type;

const char *propName;

gnoclOptFunc *func;

enum GnoclOptionStatus status;

union

  {

  gboolean b;

  gint i;

  gdouble d;

  gchar *str;

  Tcl_Obj *obj;

  } val;

} GnoclOption;

During compilation, arrays of structures are made. The following is the simplest example:

static GnoclOption drawingAreaOptions[] =

{

{ "-tooltip", GNOCL_OBJ, "", gnoclOptTooltip },

{ NULL }, 
};

Usually these are fixed, the dimension of the array defined in the code itself. The GtkDrawingArea widget has no default signals as the process is left to the coder. I want to pass this feature onto the Tcl/Gnocl scripter, so I need to expand the above static declaration as needed.

For instance, I might want to append

{“-motion”, GNOCL_OBJ,””,gnoclOptOnMotion}

to the array. I know that I should use realloc or g_realloc to achieve this task, but my attempts fail. This is the snippet in my source that I’m working on:

/* get the total number of items in the array */

gint n = sizeof (drawingAreaOptions) / sizeof(GnoclOption);

/* allocate more memory to the array to hold one more entry */

drawingAreaOptions = g_realloc( &drawingAreaOptions, (gint) (n+1 * sizeof(struct GnoclOption_)));

drawingAreaOptions[n].optName = “-motion”;
drawingAreaOptions[n].type = GNOCL_OBJ;
drawingAreaOptions[n].propName = "";
drawingAreaOptions[n].func = gnoclOptOnMotion;

When compiled, I get the following error: “incompatible types in assignment”.

What’s going wrong?