55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
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/*
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Copyright 2014 CoreOS, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package validate
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import (
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"strings"
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)
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// context represents the current position within a newline-delimited string.
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// Each line is loaded, one by one, into currentLine (newline omitted) and
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// lineNumber keeps track of its position within the original string.
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type context struct {
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currentLine string
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remainingLines string
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lineNumber int
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}
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// Increment moves the context to the next line (if available).
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func (c *context) Increment() {
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if c.currentLine == "" && c.remainingLines == "" {
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return
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}
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lines := strings.SplitN(c.remainingLines, "\n", 2)
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c.currentLine = lines[0]
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if len(lines) == 2 {
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c.remainingLines = lines[1]
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} else {
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c.remainingLines = ""
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}
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c.lineNumber++
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}
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// NewContext creates a context from the provided data. It strips out all
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// carriage returns and moves to the first line (if available).
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func NewContext(content []byte) context {
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c := context{remainingLines: strings.Replace(string(content), "\r", "", -1)}
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c.Increment()
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return c
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}
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