opt: add an int decrementing helper function

[ccan] / ccan / opt / helpers.c

diff --git a/ccan/opt/helpers.c b/ccan/opt/helpers.c
index 25929bd5bf705f6681a1c7303288a58a16d4453c..c557f96d8488d01d3e1297ea235f6c2c8b76fb4f 100644 (file)
--- a/ccan/opt/helpers.c
+++ b/ccan/opt/helpers.c
@@ -1,7 +1,9 @@
-/* Licensed under GPLv3+ - see LICENSE file for details */
+/* Licensed under GPLv2+ - see LICENSE file for details */
 #include <ccan/opt/opt.h>
 #include <ccan/cast/cast.h>
+#include <inttypes.h>
 #include <string.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <errno.h>
 #include <stdio.h>
@@ -114,12 +116,61 @@ char *opt_set_ulongval(const char *arg, unsigned long *ul)
        return NULL;
 }
 
+char *opt_set_floatval(const char *arg, float *f)
+{
+       double d;
+       char *err;
+
+       err = opt_set_doubleval(arg, &d);
+       if (err)
+               return err;
+
+       *f = d;
+       if (*f != d)
+               return arg_bad("'%s' is out of range", arg);
+
+       return NULL;
+}
+
+void opt_show_floatval(char buf[OPT_SHOW_LEN], const float *f)
+{
+       double d = *f;
+       opt_show_doubleval(buf, &d);
+}
+
+char *opt_set_doubleval(const char *arg, double *d)
+{
+       char *endp;
+
+       /* This is how the manpage says to do it.  Yech. */
+       errno = 0;
+       /* Don't assume strtof */
+       *d = strtod(arg, &endp);
+       if (*endp || !arg[0])
+               return arg_bad("'%s' is not a number", arg);
+       if (errno)
+               return arg_bad("'%s' is out of range", arg);
+
+       return NULL;
+}
+
+void opt_show_doubleval(char buf[OPT_SHOW_LEN], const double *d)
+{
+       snprintf(buf, OPT_SHOW_LEN, "%f", *d);
+}
+
 char *opt_inc_intval(int *i)
 {
        (*i)++;
        return NULL;
 }
 
+char *opt_dec_intval(int *i)
+{
+       (*i)--;
+       return NULL;
+}
+
 /* Display version string. */
 char *opt_version_and_exit(const char *version)
 {
@@ -193,9 +244,10 @@ static char *set_llong_with_suffix(const char *arg, long long *ll,
                                   const long long base)
 {
        char *endp;
-       if (!arg[0])
+       if (!arg[0]){
+               *ll = 0;
                return arg_bad("'%s' (an empty string) is not a number", arg);
-
+       }
        errno = 0;
        *ll = strtoll(arg, &endp, 0);
        if (errno)
@@ -401,9 +453,9 @@ static void show_llong_with_suffix(char buf[OPT_SHOW_LEN], long long ll,
                ll = tmp;
        }
        if (i == 0)
-               snprintf(buf, OPT_SHOW_LEN, "%lld", ll);
+               snprintf(buf, OPT_SHOW_LEN, "%"PRId64, (int64_t)ll);
        else
-               snprintf(buf, OPT_SHOW_LEN, "%lld%c", ll, suffixes[i - 1]);
+               snprintf(buf, OPT_SHOW_LEN, "%"PRId64"%c", (int64_t)ll, suffixes[i - 1]);
 }
 
 static void show_ullong_with_suffix(char buf[OPT_SHOW_LEN], unsigned long long ull,
@@ -423,9 +475,9 @@ static void show_ullong_with_suffix(char buf[OPT_SHOW_LEN], unsigned long long u
                ull = tmp;
        }
        if (i == 0)
-               snprintf(buf, OPT_SHOW_LEN, "%llu", ull);
+               snprintf(buf, OPT_SHOW_LEN, "%"PRIu64, (uint64_t)ull);
        else
-               snprintf(buf, OPT_SHOW_LEN, "%llu%c", ull, suffixes[i - 1]);
+               snprintf(buf, OPT_SHOW_LEN, "%"PRIu64"%c", (uint64_t)ull, suffixes[i - 1]);
 }
 
 /* _bi, signed */