static char *
extract_identifier (char **expp, int is_parameter)
{
char *result;
char *p = *expp;
unsigned int len;
if (is_parameter && startswith (p, "..."))
{
/* Ok. */
}
else
{
if (! *p || ! macro_is_identifier_nondigit (*p))
return NULL;
for (++p;
*p && (macro_is_identifier_nondigit (*p) || macro_is_digit (*p));
++p)
;
}
if (is_parameter && startswith (p, "..."))
p += 3;
len = p - *expp;
result = (char *) xmalloc (len + 1);
memcpy (result, *expp, len);
result[len] = '\0';
*expp += len;
return result;
}
static int
get_pp_number (struct macro_buffer *tok, char *p, char *end)
{
if (p < end
&& (macro_is_digit (*p)
|| (*p == '.'
&& p + 2 <= end
&& macro_is_digit (p[1]))))
{
char *tok_start = p;
while (p < end)
{
if (p + 2 <= end
&& strchr ("eEpP", *p)
&& (p[1] == '+' || p[1] == '-'))
p += 2;
else if (macro_is_digit (*p)
|| macro_is_identifier_nondigit (*p)
|| *p == '.')
p++;
else
break;
}
set_token (tok, tok_start, p);
return 1;
}
else
return 0;
}
static int
get_identifier (struct macro_buffer *tok, char *p, char *end)
{
if (p < end
&& macro_is_identifier_nondigit (*p))
{
char *tok_start = p;
while (p < end
&& (macro_is_identifier_nondigit (*p)
|| macro_is_digit (*p)))
p++;
set_token (tok, tok_start, p);
tok->is_identifier = 1;
return 1;
}
else
return 0;
}
