66 lines
2.1 KiB
Go
66 lines
2.1 KiB
Go
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// The MIT License (MIT)
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//
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// Original Work
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// Copyright (c) 2016 Matthias Kadenbach
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// https://github.com/mattes/migrate
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//
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// Modified Work
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// Copyright (c) 2018 Dale Hui
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// https://github.com/golang-migrate/migrate
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package postgres
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import "strings"
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const newLine = '\n'
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func runesCount(input []rune, target rune) int {
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var count int
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for _, r := range input {
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if r == target {
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count++
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}
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}
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return count
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}
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func runesLastIndex(input []rune, target rune) int {
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for i := len(input) - 1; i >= 0; i-- {
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if input[i] == target {
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return i
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}
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}
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return -1
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}
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func computeLineFromPos(s string, pos int) (line uint, col uint, ok bool) {
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// replace crlf with lf
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s = strings.Replace(s, "\r\n", "\n", -1)
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// pg docs: pos uses index 1 for the first character, and positions are measured in characters not bytes
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runes := []rune(s)
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if pos > len(runes) {
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return 0, 0, false
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}
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sel := runes[:pos]
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line = uint(runesCount(sel, newLine) + 1)
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col = uint(pos - 1 - runesLastIndex(sel, newLine))
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return line, col, true
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}
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