We already have strtoul_ui() and similar functions that provide proper
error handling using strtoul from the standard library. However,
there isn't currently a variant that returns an unsigned long.
This commit introduces strtoul_ul() to address this gap, enabling the
return of an unsigned long with proper error handling.
---
git-compat-util.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/git-compat-util.h b/git-compat-util.h
index e283c46c6f..3bdb085624 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -1351,6 +1351,24 @@ static inline int strtoul_ui(char const *s, int base, unsigned int *result)
return 0;
}
+// Converts a string to an unsigned long using the standard library's strtoul,
+// with additional error handling to ensure robustness.
+static inline int strtoul_ul(char const *s, int base, unsigned long *result)
+{
+ unsigned long ul;
+ char *p;
+
+ errno = 0;
+ /* negative values would be accepted by strtoul */
+ if (strchr(s, '-'))
+ return -1;
+ ul = strtoul(s, &p, base);
+ if (errno || *p || p == s )
+ return -1;
+ *result = ul;
+ return 0;
+}
+
static inline int strtol_i(char const *s, int base, int *result)
{
long ul;
--
2.47.0
