Initial project import

tools/v/vlib/semver/util.v

@@ -0,0 +1,55 @@
+module semver
+
+// * Private functions.
+@[inline]
+fn is_version_valid(input string) bool {
+	raw_ver := parse(input)
+	return raw_ver.is_valid()
+}
+
+@[inline]
+fn coerce_version(input string) !Version {
+	raw_ver := parse(input)
+	return raw_ver.coerce() or { return error('Invalid version for input "${input}"') }
+}
+
+@[inline]
+fn increment_version(ver Version, typ Increment) Version {
+	mut major := ver.major
+	mut minor := ver.minor
+	mut patch := ver.patch
+	match typ {
+		.major {
+			major++
+			minor = 0
+			patch = 0
+		}
+		.minor {
+			minor++
+			patch = 0
+		}
+		.patch {
+			patch++
+		}
+	}
+
+	return Version{major, minor, patch, ver.prerelease, ver.metadata}
+}
+
+fn is_valid_string(input string) bool {
+	for c in input {
+		if !(c.is_letter() || c.is_digit() || c == `.` || c == `-`) {
+			return false
+		}
+	}
+	return true
+}
+
+fn is_valid_number(input string) bool {
+	for c in input {
+		if !c.is_digit() {
+			return false
+		}
+	}
+	return true
+}