sscanf/strtoul: parse integers robustly

[git.git] / git-compat-util.h

diff --git a/git-compat-util.h b/git-compat-util.h
index 139fc19108cab51eb23659868ef8600ff6b25795..5f6a281b78245bbb4e1e480d81cfb8c1b4cfa6ac 100644 (file)
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -301,4 +301,17 @@ static inline int prefixcmp(const char *str, const char *prefix)
        return strncmp(str, prefix, strlen(prefix));
 }
 
+static inline int strtoul_ui(char const *s, int base, unsigned int *result)
+{
+       unsigned long ul;
+       char *p;
+
+       errno = 0;
+       ul = strtoul(s, &p, base);
+       if (errno || *p || p == s || (unsigned int) ul != ul)
+               return -1;
+       *result = ul;
+       return 0;
+}
+
 #endif