/* Current token. */
int token;
-/* T_NUM: the token's value. */
+/* T_POS_NUM, T_NEG_NUM: the token's value. */
double tokval;
/* T_ID: the identifier. */
token = '-';
break;
}
+ token = T_NEG_NUM;
}
-
+ else
+ token = T_POS_NUM;
+
/* Parse the number, copying it into tokstr. */
while (isdigit ((unsigned char) *prog))
ds_putc (&tokstr, *prog++);
ds_putc (&tokstr, '0');
}
- token = T_NUM;
break;
}
\f
/* Token testing functions. */
-/* Returns nonzero if the current token is an integer. */
-int
-lex_integer_p (void)
+/* Returns true if the current token is a number. */
+bool
+lex_is_number (void)
+{
+ return token == T_POS_NUM || token == T_NEG_NUM;
+}
+
+/* Returns the value of the current token, which must be a
+ floating point number. */
+double
+lex_number (void)
+{
+ assert (lex_is_number ());
+ return tokval;
+}
+
+/* Returns true iff the current token is an integer. */
+bool
+lex_is_integer (void)
{
- return (token == T_NUM
+ return (lex_is_number ()
&& tokval != NOT_LONG
&& tokval >= LONG_MIN
&& tokval <= LONG_MAX
long
lex_integer (void)
{
- assert (lex_integer_p ());
+ assert (lex_is_integer ());
return tokval;
}
-/* Returns nonzero if the current token is an floating point. */
-int
-lex_double_p (void)
-{
- return ( token == T_NUM
- && tokval != NOT_DOUBLE );
-}
-
-/* Returns the value of the current token, which must be a
- floating point number. */
-double
-lex_double (void)
-{
- assert (lex_double_p ());
- return tokval;
-}
-
\f
/* Token matching functions. */
int
lex_match_int (int x)
{
- if (lex_integer_p () && lex_integer () == x)
+ if (lex_is_integer () && lex_integer () == x)
{
lex_get ();
return 1;
int
lex_force_int (void)
{
- if (lex_integer_p ())
+ if (lex_is_integer ())
return 1;
else
{
int
lex_force_num (void)
{
- if (token == T_NUM)
+ if (lex_is_number ())
return 1;
else
{
switch (token)
{
case T_ID:
- case T_NUM:
+ case T_POS_NUM:
+ case T_NEG_NUM:
return xstrdup (ds_c_str (&tokstr));
break;
void
lex_negative_to_dash (void)
{
- if (token == T_NUM && tokval < 0.0)
+ if (token == T_NEG_NUM)
{
- token = T_NUM;
+ token = T_POS_NUM;
tokval = -tokval;
ds_replace (&tokstr, ds_c_str (&tokstr) + 1);
save_token ();
fprintf (stderr, "ID\t%s\n", tokid);
break;
- case T_NUM:
+ case T_POS_NUM:
+ case T_NEG_NUM:
fprintf (stderr, "NUM\t%f\n", tokval);
break;