opt: get rid of last remnant of getopt.

[ccan] / ccan / opt / helpers.c

diff --git a/ccan/opt/helpers.c b/ccan/opt/helpers.c
index a27be22f3d1a6475221a1b7fa86756f148fa68b9..420a97a4fcac596fd31999ffbda42bb229a7f0f3 100644 (file)
--- 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;
 }
@@ -258,7 +258,8 @@ static char * set_long_with_suffix(const char *arg, long *l, const long base)
                return err;
 
        *l = ll;
-       if (*l != ll)
+       /* Beware truncation, but don't generate untestable code. */
+       if (sizeof(*l) != sizeof(ll) && *l != ll)
                return arg_bad("value '%s' does not fit into a long", arg);
        return NULL;
 }
@@ -272,7 +273,8 @@ static char * set_ulong_with_suffix(const char *arg, unsigned long *ul, const lo
        if (ll < 0)
                return arg_bad("'%s' is negative but destination is unsigned", arg);
        *ul = ll;
-       if (*ul != ll)
+       /* Beware truncation, but don't generate untestable code. */
+       if (sizeof(*ul) != sizeof(ll) && *ul != ll)
                return arg_bad("value '%s' does not fit into an unsigned long", arg);
        return NULL;
 }
@@ -370,3 +372,116 @@ 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);
+}
+