For some options with a numerical value, it is sometimes desirable,
to easily specify we want the maximum possible value.
This patch allow to interpret '=0' as meaning the maximum value.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx>
---
lib.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/lib.c b/lib.c
index 5fda4b029..6352b4e93 100644
--- a/lib.c
+++ b/lib.c
@@ -509,8 +509,11 @@ static int handle_simple_switch(const char *arg, const struct flag *flags)
return 0;
}
+
+#define OPTNUM_ZERO_IS_INF 1
+
#define OPT_NUMERIC(NAME, TYPE, FUNCTION) \
-static int opt_##NAME(char *arg, const char *name, TYPE *ptr) \
+static int opt_##NAME(char *arg, const char *name, TYPE *ptr, int flag) \
{ \
char *opt; \
char *end; \
@@ -523,6 +526,8 @@ static int opt_##NAME(char *arg, const char *name, TYPE *ptr) \
if (*end != '\0' || end == opt) { \
die("error: missing argument to \"%s\"", name); \
} \
+ if ((flag & OPTNUM_ZERO_IS_INF) && val == 0) \
+ val = ~val; \
*ptr = val; \
return 1; \
}
--
2.14.0
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