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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 |
27 | rot * + 4 +\r |
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 |