ERROR: index row size

Hello,

Ok, I give up! Tried a lot of things in my code! But still get error on
index row size. So, I'm part of my code, if someone could help me! A valid
value for this type is: '(03-jan-2007 , 15-may-2010)'

typedef struct t_periodo

{

DateADT tvi;

DateADT tvf;

} Periodo;

Datum

periodo_in(PG_FUNCTION_ARGS)

{

char *str = PG_GETARG_CSTRING(0);

char tvi_char[MAXDATEFIELDS];

char tvf_char[MAXDATEFIELDS];

tvi_char = (char *) palloc(strlen(MAXDATEFIELDS));

tvf_char = (char *) palloc(strlen(MAXDATEFIELDS));

Periodo *result;

if (sscanf(str, " ( %s , %s )", tvi_char, tvf_char) != 2)

ereport(ERROR,

(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),

errmsg("invalid input syntax for periodo: \"%s\"", str)));

result->tvi = StringToDateADT(tvi_char);

result->tvi = StringToDateADT(tvf_char);

result = (Periodo *) palloc(sizeof(Periodo));

if (result->tvi > result->tvf)

ereport(ERROR,

(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),

errmsg("Initial date (TVi) must be smaller than final date
(TVf)")));

PG_RETURN_POINTER(result);

}

Please help me!

Thanks in advance!