Mercurial > yakumo_izuru > aya
comparison vendor/github.com/yosssi/gcss/parse.go @ 66:787b5ee0289d draft
Use vendored modules
Signed-off-by: Izuru Yakumo <yakumo.izuru@chaotic.ninja>
| author | yakumo.izuru |
|---|---|
| date | Sun, 23 Jul 2023 13:18:53 +0000 |
| parents | |
| children |
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| 65:6d985efa0f7a | 66:787b5ee0289d |
|---|---|
| 1 package gcss | |
| 2 | |
| 3 import "strings" | |
| 4 | |
| 5 // Special characters | |
| 6 const ( | |
| 7 cr = "\r" | |
| 8 lf = "\n" | |
| 9 crlf = "\r\n" | |
| 10 space = " " | |
| 11 colon = ":" | |
| 12 comma = "," | |
| 13 openBrace = "{" | |
| 14 closeBrace = "}" | |
| 15 semicolon = ";" | |
| 16 ampersand = "&" | |
| 17 atMark = "@" | |
| 18 dollarMark = "$" | |
| 19 openParenthesis = "(" | |
| 20 closeParenthesis = ")" | |
| 21 slash = "/" | |
| 22 doubleSlash = slash + slash | |
| 23 ) | |
| 24 | |
| 25 // parse parses the string, generates the elements | |
| 26 // and returns the two channels: the first one returns | |
| 27 // the generated elements and the last one returns | |
| 28 // an error when it occurs. | |
| 29 func parse(lines []string) (<-chan element, <-chan error) { | |
| 30 elemc := make(chan element, len(lines)) | |
| 31 errc := make(chan error) | |
| 32 | |
| 33 go func() { | |
| 34 i := 0 | |
| 35 l := len(lines) | |
| 36 | |
| 37 for i < l { | |
| 38 // Fetch a line. | |
| 39 ln := newLine(i+1, lines[i]) | |
| 40 i++ | |
| 41 | |
| 42 // Ignore the empty line. | |
| 43 if ln.isEmpty() { | |
| 44 continue | |
| 45 } | |
| 46 | |
| 47 if ln.isTopIndent() { | |
| 48 elem, err := newElement(ln, nil) | |
| 49 | |
| 50 if err != nil { | |
| 51 errc <- err | |
| 52 return | |
| 53 } | |
| 54 | |
| 55 if err := appendChildren(elem, lines, &i, l); err != nil { | |
| 56 errc <- err | |
| 57 return | |
| 58 } | |
| 59 | |
| 60 elemc <- elem | |
| 61 } | |
| 62 } | |
| 63 | |
| 64 close(elemc) | |
| 65 }() | |
| 66 | |
| 67 return elemc, errc | |
| 68 } | |
| 69 | |
| 70 // appendChildren parses the lines and appends the child elements | |
| 71 // to the parent element. | |
| 72 func appendChildren(parent element, lines []string, i *int, l int) error { | |
| 73 for *i < l { | |
| 74 // Fetch a line. | |
| 75 ln := newLine(*i+1, lines[*i]) | |
| 76 | |
| 77 // Ignore the empty line. | |
| 78 if ln.isEmpty() { | |
| 79 *i++ | |
| 80 return nil | |
| 81 } | |
| 82 | |
| 83 ok, err := ln.childOf(parent) | |
| 84 | |
| 85 if err != nil { | |
| 86 return err | |
| 87 } | |
| 88 | |
| 89 if !ok { | |
| 90 return nil | |
| 91 } | |
| 92 | |
| 93 child, err := newElement(ln, parent) | |
| 94 | |
| 95 if err != nil { | |
| 96 return err | |
| 97 } | |
| 98 | |
| 99 parent.AppendChild(child) | |
| 100 | |
| 101 *i++ | |
| 102 | |
| 103 if err := appendChildren(child, lines, i, l); err != nil { | |
| 104 return err | |
| 105 } | |
| 106 } | |
| 107 | |
| 108 return nil | |
| 109 } | |
| 110 | |
| 111 // formatLF replaces the line feed codes with LF and | |
| 112 // returns the result string. | |
| 113 func formatLF(s string) string { | |
| 114 return strings.Replace(strings.Replace(s, crlf, lf, -1), cr, lf, -1) | |
| 115 } |