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-rw-r--r--src/shared/util.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/src/shared/util.c b/src/shared/util.c
index b1689e651f..d8a75bdc6a 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -332,6 +332,26 @@ int safe_atoi(const char *s, int *ret_i) {
return 0;
}
+int safe_atou8(const char *s, uint8_t *ret) {
+ char *x = NULL;
+ unsigned long l;
+
+ assert(s);
+ assert(ret);
+
+ errno = 0;
+ l = strtoul(s, &x, 0);
+
+ if (!x || x == s || *x || errno)
+ return errno > 0 ? -errno : -EINVAL;
+
+ if ((unsigned long) (uint8_t) l != l)
+ return -ERANGE;
+
+ *ret = (uint8_t) l;
+ return 0;
+}
+
int safe_atollu(const char *s, long long unsigned *ret_llu) {
char *x = NULL;
unsigned long long l;