#include <stdio.h>
#include <limits.h>
#include "private.h"
+#include <float.h>
/* Upper bound to sprintf this simple type? Each 3 bits < 1 digit. */
#define CHAR_SIZE(type) (((sizeof(type)*CHAR_BIT + 2) / 3) + 1)
-/* FIXME: asprintf module? */
static char *arg_bad(const char *fmt, const char *arg)
{
- char *str = malloc(strlen(fmt) + strlen(arg));
+ char *str = opt_alloc.alloc(strlen(fmt) + strlen(arg));
sprintf(str, fmt, arg);
return str;
}
return err;
*f = d;
- if (*f != d)
- return arg_bad("'%s' is out of range", arg);
+
+ /*allow true infinity via --foo=INF, while avoiding isinf() from math.h
+ because it wasn't standard 25 years ago.*/
+ double inf = 1e300 * 1e300; /*direct 1e600 annoys -Woverflow*/
+ if ((d > FLT_MAX || d < -FLT_MAX) && d != inf && d != -inf)
+ return arg_bad("'%s' is out of range for a 32 bit float", arg);
+ if (d != 0 && *f == 0)
+ return arg_bad("'%s' is out of range (truncated to zero)", arg);
return NULL;
}
void opt_show_charp(char buf[OPT_SHOW_LEN], char *const *p)
{
- size_t len = strlen(*p);
- buf[0] = '"';
- if (len > OPT_SHOW_LEN - 2)
- len = OPT_SHOW_LEN - 2;
- strncpy(buf+1, *p, len);
- buf[1+len] = '"';
- if (len < OPT_SHOW_LEN - 2)
- buf[2+len] = '\0';
+ if (*p){
+ size_t len = strlen(*p);
+ buf[0] = '"';
+ if (len > OPT_SHOW_LEN - 2)
+ len = OPT_SHOW_LEN - 2;
+ strncpy(buf+1, *p, len);
+ buf[1+len] = '"';
+ if (len < OPT_SHOW_LEN - 2)
+ buf[2+len] = '\0';
+ }
+ else {
+ strncpy(buf, "(nil)", OPT_SHOW_LEN);
+ }
}
/* Show an integer value, various forms. */