X-Git-Url: https://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Fopt%2Fhelpers.c;h=dfeb4e2e790a553173830d039ae84b8026df2fa8;hb=fc4096b8b78fb90a778f5dcd4686db312138c9f2;hp=a27be22f3d1a6475221a1b7fa86756f148fa68b9;hpb=babb23101ae447aefb65284b8f535f84e6a35008;p=ccan

diff --git a/ccan/opt/helpers.c b/ccan/opt/helpers.c
index a27be22f..dfeb4e2e 100644
--- a/ccan/opt/helpers.c
+++ b/ccan/opt/helpers.c
@@ -66,8 +66,8 @@ char *opt_set_intval(const char *arg, int *i)
 	if (err)
 		return err;
 	*i = l;
-	/* Beware truncation... */
-	if (*i != l)
+	/* Beware truncation, but don't generate untestable code. */
+	if (sizeof(*i) != sizeof(l) && *i != l)
 		return arg_bad("value '%s' does not fit into an integer", arg);
 	return err;
 }
@@ -370,3 +370,116 @@ char * opt_set_uintval_si(const char *arg, unsigned int *u)
 {
 	return set_uint_with_suffix(arg, u, 1000);
 }
+
+/*static helpers for showing values with kMGTPE suffixes.  In this case there
+  are separate but essentially identical functions for signed and unsigned
+  values, so that unsigned values greater than LLONG_MAX get suffixes.
+ */
+static void show_llong_with_suffix(char buf[OPT_SHOW_LEN], long long ll,
+				    const long long base)
+{
+	const char *suffixes = "kMGTPE";
+	int i;
+	if (ll == 0){
+		/*zero is special because everything divides it (you'd get "0E")*/
+		snprintf(buf, OPT_SHOW_LEN, "0");
+		return;
+	}
+	for (i = 0; i < strlen(suffixes); i++){
+		long long tmp = ll / base;
+		if (tmp * base != ll)
+			break;
+		ll = tmp;
+	}
+	if (i == 0)
+		snprintf(buf, OPT_SHOW_LEN, "%lld", ll);
+	else
+		snprintf(buf, OPT_SHOW_LEN, "%lld%c", ll, suffixes[i - 1]);
+}
+
+static void show_ullong_with_suffix(char buf[OPT_SHOW_LEN], unsigned long long ull,
+				    const unsigned base)
+{
+	const char *suffixes = "kMGTPE";
+	int i;
+	if (ull == 0){
+		/*zero is special because everything divides it (you'd get "0E")*/
+		snprintf(buf, OPT_SHOW_LEN, "0");
+		return;
+	}
+	for (i = 0; i < strlen(suffixes); i++){
+		unsigned long long tmp = ull / base;
+		if (tmp * base != ull)
+			break;
+		ull = tmp;
+	}
+	if (i == 0)
+		snprintf(buf, OPT_SHOW_LEN, "%llu", ull);
+	else
+		snprintf(buf, OPT_SHOW_LEN, "%llu%c", ull, suffixes[i - 1]);
+}
+
+/* _bi, signed */
+void opt_show_intval_bi(char buf[OPT_SHOW_LEN], const int *x)
+{
+	show_llong_with_suffix(buf, *x, 1024);
+}
+
+void opt_show_longval_bi(char buf[OPT_SHOW_LEN], const long *x)
+{
+	show_llong_with_suffix(buf, *x, 1024);
+}
+
+void opt_show_longlongval_bi(char buf[OPT_SHOW_LEN], const long long *x)
+{
+	show_llong_with_suffix(buf, *x, 1024);
+}
+
+/* _bi, unsigned */
+void opt_show_uintval_bi(char buf[OPT_SHOW_LEN], const unsigned int *x)
+{
+	show_ullong_with_suffix(buf, (unsigned long long) *x, 1024);
+}
+
+void opt_show_ulongval_bi(char buf[OPT_SHOW_LEN], const unsigned long *x)
+{
+	show_ullong_with_suffix(buf, (unsigned long long) *x, 1024);
+}
+
+void opt_show_ulonglongval_bi(char buf[OPT_SHOW_LEN], const unsigned long long *x)
+{
+	show_ullong_with_suffix(buf, (unsigned long long) *x, 1024);
+}
+
+/* _si, signed */
+void opt_show_intval_si(char buf[OPT_SHOW_LEN], const int *x)
+{
+	show_llong_with_suffix(buf, (long long) *x, 1000);
+}
+
+void opt_show_longval_si(char buf[OPT_SHOW_LEN], const long *x)
+{
+	show_llong_with_suffix(buf, (long long) *x, 1000);
+}
+
+void opt_show_longlongval_si(char buf[OPT_SHOW_LEN], const long long *x)
+{
+	show_llong_with_suffix(buf, *x, 1000);
+}
+
+/* _si, unsigned */
+void opt_show_uintval_si(char buf[OPT_SHOW_LEN], const unsigned int *x)
+{
+	show_ullong_with_suffix(buf, (unsigned long long) *x, 1000);
+}
+
+void opt_show_ulongval_si(char buf[OPT_SHOW_LEN], const unsigned long *x)
+{
+	show_ullong_with_suffix(buf, (unsigned long long) *x, 1000);
+}
+
+void opt_show_ulonglongval_si(char buf[OPT_SHOW_LEN], const unsigned long long *x)
+{
+	show_ullong_with_suffix(buf, (unsigned long long) *x, 1000);
+}
+