1 files changed, 30 insertions, 0 deletions
diff --git a/lstring.c b/lstring.c
new file mode 100644
index 0000000..ee8904f
--- /dev/null
+++ b/lstring.c
@@ -0,0 +1,30 @@
+#include "lstring.h"
+
+BOOL isInt(const struct string *value, int start)
+{
+	size_t i;
+	for (i = start; i < value->l; ++i) {
+		if (value->s[i] < '0' || value->s[i] > '9') return FALSE;
+	}
+	return TRUE;
+}
+
+uint32_t parseUInt32(const struct string * const s)
+{
+	if (s == NULL || s->l > 10) {
+		return 0;
+	}
+	uint32_t ret = 0, last = 0;
+	for (size_t i = 0; i < s->l; ++i) {
+		if (s->s[i] < '0' || s->s[i] > '9') {
+			return 0;
+		}
+		ret = ret * 10 + (s->s[i] - '0');
+		if (ret < last) {
+			return 0;
+		}
+		last = ret;
+	}
+	return ret;
+}
+