Mercurial Hosting > luan
annotate src/luan/modules/parsers/Csv.java @ 1111:88b5b81cad4a
move Parser to luan.lib.parser
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Wed, 02 Aug 2017 15:19:47 -0600 |
| parents | 1a68fc55a80c |
| children | 9fa8b8389578 |
| rev | line source |
|---|---|
| 585 | 1 package luan.modules.parsers; |
| 2 | |
| 3 import luan.LuanTable; | |
|
1111
88b5b81cad4a
move Parser to luan.lib.parser
Franklin Schmidt <fschmidt@gmail.com>
parents:
775
diff
changeset
|
4 import luan.lib.parser.Parser; |
|
88b5b81cad4a
move Parser to luan.lib.parser
Franklin Schmidt <fschmidt@gmail.com>
parents:
775
diff
changeset
|
5 import luan.lib.parser.ParseException; |
| 585 | 6 |
| 7 | |
| 8 public final class Csv { | |
| 9 | |
| 10 public static LuanTable toList(String line) throws ParseException { | |
| 11 return new Csv(line).parse(); | |
| 12 } | |
| 13 | |
| 14 private final Parser parser; | |
| 15 | |
| 16 private Csv(String line) { | |
| 17 this.parser = new Parser(line); | |
| 18 } | |
| 19 | |
| 20 private ParseException exception(String msg) { | |
| 21 return new ParseException(parser,msg); | |
| 22 } | |
| 23 | |
| 24 private LuanTable parse() throws ParseException { | |
| 25 LuanTable list = new LuanTable(); | |
| 26 while(true) { | |
| 27 Spaces(); | |
| 28 String field = parseField(); | |
| 29 list.rawPut(list.rawLength()+1,field); | |
| 30 Spaces(); | |
| 31 if( parser.endOfInput() ) | |
| 32 return list; | |
| 33 if( !parser.match(',') ) | |
| 34 throw exception("unexpected char"); | |
| 35 } | |
| 36 } | |
| 37 | |
| 38 private String parseField() throws ParseException { | |
| 39 parser.begin(); | |
| 40 String rtn; | |
| 41 if( parser.match('"') ) { | |
| 42 int start = parser.currentIndex(); | |
| 43 do { | |
| 44 if( parser.endOfInput() ) { | |
| 45 parser.failure(); | |
| 46 throw exception("unclosed quote"); | |
| 47 } | |
| 48 } while( parser.noneOf("\"") ); | |
| 49 rtn = parser.textFrom(start); | |
| 50 parser.match('"'); | |
| 51 } else { | |
| 52 int start = parser.currentIndex(); | |
| 53 while( !parser.endOfInput() && parser.noneOf(",") ); | |
| 54 rtn = parser.textFrom(start).trim(); | |
| 55 } | |
| 56 return parser.success(rtn); | |
| 57 } | |
| 58 | |
| 59 private void Spaces() { | |
| 60 while( parser.anyOf(" \t") ); | |
| 61 } | |
| 62 | |
| 63 } |