1 files changed, 116 insertions, 0 deletions
diff --git a/vendor/github.com/denis-tingaikin/go-header/reader.go b/vendor/github.com/denis-tingaikin/go-header/reader.go
new file mode 100644
index 000000000..9c9e88a17
--- /dev/null
+++ b/vendor/github.com/denis-tingaikin/go-header/reader.go
@@ -0,0 +1,116 @@
+/*
+Copyright (c) 2020-2022 Denis Tingaikin
+
+SPDX-License-Identifier: Apache-2.0
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at:
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package goheader
+
+func NewReader(text string) *Reader {
+	return &Reader{source: text}
+}
+
+type Reader struct {
+	source   string
+	position int
+	location Location
+	offset   Location
+}
+
+func (r *Reader) SetOffset(offset Location) {
+	r.offset = offset
+}
+
+func (r *Reader) Position() int {
+	return r.position
+}
+
+func (r *Reader) Location() Location {
+	return r.location.Add(r.offset)
+}
+
+func (r *Reader) Peek() rune {
+	if r.Done() {
+		return rune(0)
+	}
+	return rune(r.source[r.position])
+}
+
+func (r *Reader) Done() bool {
+	return r.position >= len(r.source)
+}
+
+func (r *Reader) Next() rune {
+	if r.Done() {
+		return rune(0)
+	}
+	reuslt := r.Peek()
+	if reuslt == '\n' {
+		r.location.Line++
+		r.location.Position = 0
+	} else {
+		r.location.Position++
+	}
+	r.position++
+	return reuslt
+}
+
+func (r *Reader) Finish() string {
+	if r.position >= len(r.source) {
+		return ""
+	}
+	defer r.till()
+	return r.source[r.position:]
+}
+
+func (r *Reader) SetPosition(pos int) {
+	if pos < 0 {
+		r.position = 0
+	}
+	r.position = pos
+	r.location = r.calculateLocation()
+}
+
+func (r *Reader) ReadWhile(match func(rune) bool) string {
+	if match == nil {
+		return ""
+	}
+	start := r.position
+	for !r.Done() && match(r.Peek()) {
+		r.Next()
+	}
+	return r.source[start:r.position]
+}
+
+func (r *Reader) till() {
+	r.position = len(r.source)
+	r.location = r.calculateLocation()
+}
+
+func (r *Reader) calculateLocation() Location {
+	min := len(r.source)
+	if min > r.position {
+		min = r.position
+	}
+	x, y := 0, 0
+	for i := 0; i < min; i++ {
+		if r.source[i] == '\n' {
+			y++
+			x = 0
+		} else {
+			x++
+		}
+	}
+	return Location{Line: y, Position: x}
+}