Mercurial Hosting > luan
annotate src/luan/modules/parsers/Csv.java @ 1562:b89212fd04b5
remove table.luan
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Sun, 08 Nov 2020 16:50:59 -0700 |
| parents | 27efb1fcbcb5 |
| children |
| rev | line source |
|---|---|
| 585 | 1 package luan.modules.parsers; |
| 2 | |
|
1333
25746915a241
merge Luan and LuanState
Franklin Schmidt <fschmidt@gmail.com>
parents:
1330
diff
changeset
|
3 import luan.Luan; |
| 585 | 4 import luan.LuanTable; |
| 1330 | 5 import luan.LuanException; |
|
1402
27efb1fcbcb5
move luan.lib to goodjava
Franklin Schmidt <fschmidt@gmail.com>
parents:
1333
diff
changeset
|
6 import goodjava.parser.Parser; |
|
27efb1fcbcb5
move luan.lib to goodjava
Franklin Schmidt <fschmidt@gmail.com>
parents:
1333
diff
changeset
|
7 import goodjava.parser.ParseException; |
| 585 | 8 |
| 9 | |
| 10 public final class Csv { | |
| 11 | |
| 1562 | 12 public static LuanTable toList(String line) throws ParseException { |
| 1330 | 13 try { |
| 1562 | 14 return new Csv(line).parse(); |
| 1330 | 15 } catch(LuanException e) { |
| 16 throw new RuntimeException(e); | |
| 17 } | |
| 585 | 18 } |
| 19 | |
| 20 private final Parser parser; | |
| 21 | |
| 22 private Csv(String line) { | |
| 23 this.parser = new Parser(line); | |
| 24 } | |
| 25 | |
| 26 private ParseException exception(String msg) { | |
| 27 return new ParseException(parser,msg); | |
| 28 } | |
| 29 | |
| 1562 | 30 private LuanTable parse() throws ParseException, LuanException { |
| 31 LuanTable list = new LuanTable(); | |
| 585 | 32 while(true) { |
| 33 Spaces(); | |
| 34 String field = parseField(); | |
| 1562 | 35 list.rawPut(list.rawLength()+1,field); |
| 585 | 36 Spaces(); |
| 37 if( parser.endOfInput() ) | |
| 38 return list; | |
| 39 if( !parser.match(',') ) | |
| 40 throw exception("unexpected char"); | |
| 41 } | |
| 42 } | |
| 43 | |
| 44 private String parseField() throws ParseException { | |
| 45 parser.begin(); | |
| 46 String rtn; | |
| 47 if( parser.match('"') ) { | |
| 48 int start = parser.currentIndex(); | |
| 49 do { | |
| 50 if( parser.endOfInput() ) { | |
| 51 parser.failure(); | |
| 52 throw exception("unclosed quote"); | |
| 53 } | |
| 54 } while( parser.noneOf("\"") ); | |
| 55 rtn = parser.textFrom(start); | |
| 56 parser.match('"'); | |
| 57 } else { | |
| 58 int start = parser.currentIndex(); | |
| 59 while( !parser.endOfInput() && parser.noneOf(",") ); | |
| 60 rtn = parser.textFrom(start).trim(); | |
| 61 } | |
| 62 return parser.success(rtn); | |
| 63 } | |
| 64 | |
| 65 private void Spaces() { | |
| 66 while( parser.anyOf(" \t") ); | |
| 67 } | |
| 68 | |
| 69 } |