chore: vendor

vendor/github.com/charmbracelet/x/ansi/params.go

@@ -0,0 +1,45 @@
+package ansi
+
+import (
+	"bytes"
+)
+
+// Params parses and returns a list of control sequence parameters.
+//
+// Parameters are positive integers separated by semicolons. Empty parameters
+// default to zero. Parameters can have sub-parameters separated by colons.
+//
+// Any non-parameter bytes are ignored. This includes bytes that are not in the
+// range of 0x30-0x3B.
+//
+// See ECMA-48 § 5.4.1.
+func Params(p []byte) [][]uint {
+	if len(p) == 0 {
+		return [][]uint{}
+	}
+
+	// Filter out non-parameter bytes i.e. non 0x30-0x3B.
+	p = bytes.TrimFunc(p, func(r rune) bool {
+		return r < 0x30 || r > 0x3B
+	})
+
+	parts := bytes.Split(p, []byte{';'})
+	params := make([][]uint, len(parts))
+	for i, part := range parts {
+		sparts := bytes.Split(part, []byte{':'})
+		params[i] = make([]uint, len(sparts))
+		for j, spart := range sparts {
+			params[i][j] = bytesToUint16(spart)
+		}
+	}
+
+	return params
+}
+
+func bytesToUint16(b []byte) uint {
+	var n uint
+	for _, c := range b {
+		n = n*10 + uint(c-'0')
+	}
+	return n
+}