feat: adjust fiber route generation

pkg/swag/utils.go

@@ -0,0 +1,55 @@
+package swag
+
+import "unicode"
+
+// FieldsFunc split a string s by a func splitter into max n parts
+func FieldsFunc(s string, f func(rune2 rune) bool, n int) []string {
+	// A span is used to record a slice of s of the form s[start:end].
+	// The start index is inclusive and the end index is exclusive.
+	type span struct {
+		start int
+		end   int
+	}
+	spans := make([]span, 0, 32)
+
+	// Find the field start and end indices.
+	// Doing this in a separate pass (rather than slicing the string s
+	// and collecting the result substrings right away) is significantly
+	// more efficient, possibly due to cache effects.
+	start := -1 // valid span start if >= 0
+	for end, rune := range s {
+		if f(rune) {
+			if start >= 0 {
+				spans = append(spans, span{start, end})
+				// Set start to a negative value.
+				// Note: using -1 here consistently and reproducibly
+				// slows down this code by a several percent on amd64.
+				start = ^start
+			}
+		} else {
+			if start < 0 {
+				start = end
+				if n > 0 && len(spans)+1 >= n {
+					break
+				}
+			}
+		}
+	}
+
+	// Last field might end at EOF.
+	if start >= 0 {
+		spans = append(spans, span{start, len(s)})
+	}
+
+	// Create strings from recorded field indices.
+	a := make([]string, len(spans))
+	for i, span := range spans {
+		a[i] = s[span.start:span.end]
+	}
+	return a
+}
+
+// FieldsByAnySpace split a string s by any space character into max n parts
+func FieldsByAnySpace(s string, n int) []string {
+	return FieldsFunc(s, unicode.IsSpace, n)
+}