Check errors for overflow, underflow, incomplete string conversion.
Signed-off-by: Yann Droneaud <[email protected]>
---
xrandr.c | 16 +++++++++++++---
1 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/xrandr.c b/xrandr.c
index 7b4f71a..9b4f402 100644
--- a/xrandr.c
+++ b/xrandr.c
@@ -2013,10 +2013,20 @@ check_strtol(char *s)
static double
check_strtod(char *s)
{
- char *endptr;
- double result = strtod(s, &endptr);
- if (s == endptr)
+ char *endptr = NULL;
+ double result;
+
+ if (s == NULL || *s == '\0')
usage();
+
+ errno = 0;
+ result = strtod(s, &endptr);
+ if (s == endptr ||
+ (endptr != NULL && endptr != '\0') ||
+ (result == 0.0 && errno != 0) ||
+ ((result == HUGE_VAL || result == -HUGE_VAL) && errno != 0))
+ usage();
+
return result;
}
--
1.6.2.5
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