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1 | \ @(#) strings.fth 98/01/26 1.2\r |
| 2 | \ String support for PForth\r |
| 3 | \\r |
| 4 | \ Copyright Phil Burk 1994\r |
| 5 | \r |
| 6 | ANEW TASK-STRINGS.FTH\r |
| 7 | \r |
| 8 | : -TRAILING ( c-addr u1 -- c-addr u2 , strip trailing blanks )\r |
| 9 | dup 0>\r |
| 10 | IF\r |
| 11 | BEGIN\r |
| 12 | 2dup 1- chars + c@ bl =\r |
| 13 | over 0> and\r |
| 14 | WHILE\r |
| 15 | 1-\r |
| 16 | REPEAT\r |
| 17 | THEN\r |
| 18 | ;\r |
| 19 | \r |
| 20 | \ Structure of string table\r |
| 21 | : $ARRAY ( )\r |
| 22 | CREATE ( #strings #chars_max -- ) \r |
| 23 | dup ,\r |
| 24 | 2+ * even-up allot\r |
| 25 | DOES> ( index -- $addr )\r |
| 26 | dup @ ( get #chars )\r |
| 1cb310e6 |
27 | rot * + cell+\r |
| bb6b2dcd |
28 | ;\r |
| 29 | \r |
| 30 | \ Compare two strings\r |
| 31 | : $= ( $1 $2 -- flag , true if equal )\r |
| 32 | -1 -rot\r |
| 33 | dup c@ 1+ 0\r |
| 34 | DO dup c@ tolower\r |
| 35 | 2 pick c@ tolower -\r |
| 36 | IF rot drop 0 -rot LEAVE\r |
| 37 | THEN\r |
| 38 | 1+ swap 1+ swap\r |
| 39 | LOOP 2drop\r |
| 40 | ;\r |
| 41 | \r |
| 42 | : TEXT= ( addr1 addr2 count -- flag )\r |
| 43 | >r -1 -rot\r |
| 44 | r> 0\r |
| 45 | DO dup c@ tolower\r |
| 46 | 2 pick c@ tolower -\r |
| 47 | IF rot drop 0 -rot LEAVE\r |
| 48 | THEN\r |
| 49 | 1+ swap 1+ swap\r |
| 50 | LOOP 2drop\r |
| 51 | ;\r |
| 52 | \r |
| 53 | : TEXT=? ( addr1 count addr2 -- flag , for JForth compatibility )\r |
| 54 | swap text=\r |
| 55 | ;\r |
| 56 | \r |
| 57 | : $MATCH? ( $string1 $string2 -- flag , case INsensitive )\r |
| 58 | dup c@ 1+ text=\r |
| 59 | ;\r |
| 60 | \r |
| 61 | \r |
| 62 | : INDEX ( $string char -- false | address_char true , search for char in string )\r |
| 63 | >r >r 0 r> r>\r |
| 64 | over c@ 1+ 1\r |
| 65 | DO over i + c@ over =\r |
| 66 | IF rot drop\r |
| 67 | over i + rot rot LEAVE\r |
| 68 | THEN\r |
| 69 | LOOP 2drop\r |
| 70 | ?dup 0= 0=\r |
| 71 | ;\r |
| 72 | \r |
| 73 | \r |
| 74 | : $APPEND.CHAR ( $string char -- ) \ ugly stack diagram\r |
| 75 | over count chars + c!\r |
| 76 | dup c@ 1+ swap c!\r |
| 77 | ;\r |
| 78 | \r |
| 79 | \ ----------------------------------------------\r |
| 80 | : ($ROM) ( index address -- $string )\r |
| 81 | ( -- index address )\r |
| 82 | swap 0\r |
| 83 | DO dup c@ 1+ + aligned\r |
| 84 | LOOP\r |
| 85 | ;\r |
| 86 | \r |
| 87 | : $ROM ( packed array of strings, unalterable )\r |
| 88 | CREATE ( <name> -- )\r |
| 89 | DOES> ( index -- $string ) ($rom)\r |
| 90 | ;\r |
| 91 | \r |
| 92 | : TEXTROM ( packed array of strings, unalterable )\r |
| 93 | CREATE ( <name> -- )\r |
| 94 | DOES> ( index -- address count ) ($rom) count\r |
| 95 | ;\r |
| 96 | \r |
| 97 | \ -----------------------------------------------\r |
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