|
adamc@0
|
1 (* Copyright (c) 2008, Adam Chlipala
|
|
adamc@0
|
2 * All rights reserved.
|
|
adamc@0
|
3 *
|
|
adamc@0
|
4 * Redistribution and use in source and binary forms, with or without
|
|
adamc@0
|
5 * modification, are permitted provided that the following conditions are met:
|
|
adamc@0
|
6 *
|
|
adamc@0
|
7 * - Redistributions of source code must retain the above copyright notice,
|
|
adamc@0
|
8 * this list of conditions and the following disclaimer.
|
|
adamc@0
|
9 * - Redistributions in binary form must reproduce the above copyright notice,
|
|
adamc@0
|
10 * this list of conditions and the following disclaimer in the documentation
|
|
adamc@0
|
11 * and/or other materials provided with the distribution.
|
|
adamc@0
|
12 * - The names of contributors may not be used to endorse or promote products
|
|
adamc@0
|
13 * derived from this software without specific prior written permission.
|
|
adamc@0
|
14 *
|
|
adamc@0
|
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
adamc@0
|
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
adamc@0
|
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
adamc@0
|
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
adamc@0
|
19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
adamc@0
|
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
adamc@0
|
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
adamc@0
|
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
adamc@0
|
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
adamc@0
|
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
adamc@0
|
25 * POSSIBILITY OF SUCH DAMAGE.
|
|
adamc@0
|
26 *)
|
|
adamc@0
|
27
|
|
adamc@0
|
28 structure ErrorMsg :> ERROR_MSG = struct
|
|
adamc@0
|
29
|
|
adamc@0
|
30 type pos = {line : int,
|
|
adamc@0
|
31 char : int}
|
|
adamc@0
|
32
|
|
adamc@0
|
33 type span = {file : string,
|
|
adamc@0
|
34 first : pos,
|
|
adamc@0
|
35 last : pos}
|
|
adamc@0
|
36
|
|
adamc@0
|
37 type 'a located = 'a * span
|
|
adamc@0
|
38
|
|
adamc@1
|
39
|
|
adamc@1
|
40 fun posToString {line, char} =
|
|
adamc@1
|
41 String.concat [Int.toString line, ":", Int.toString char]
|
|
adamc@1
|
42
|
|
adamc@1
|
43 fun spanToString {file, first, last} =
|
|
adamc@1
|
44 String.concat [file, ":", posToString first, "-", posToString last]
|
|
adamc@1
|
45
|
|
adamc@3
|
46 val dummyPos = {line = 0,
|
|
adamc@3
|
47 char = 0}
|
|
adamc@3
|
48 val dummySpan = {file = "",
|
|
adamc@3
|
49 first = dummyPos,
|
|
adamc@3
|
50 last = dummyPos}
|
|
adamc@3
|
51
|
|
adamc@1
|
52
|
|
adamc@1
|
53 val file = ref ""
|
|
adamc@1
|
54 val numLines = ref 1
|
|
adamc@1
|
55 val lines : int list ref = ref []
|
|
adamc@1
|
56
|
|
adamc@1
|
57 fun resetPositioning fname = (file := fname;
|
|
adamc@1
|
58 numLines := 1;
|
|
adamc@1
|
59 lines := [])
|
|
adamc@1
|
60
|
|
adamc@1
|
61 fun newline pos = (numLines := !numLines + 1;
|
|
adamc@1
|
62 lines := pos :: !lines)
|
|
adamc@1
|
63
|
|
adamc@1
|
64 fun lastLineStart () =
|
|
adamc@1
|
65 case !lines of
|
|
adamc@1
|
66 [] => 0
|
|
adamc@1
|
67 | n :: _ => n+1
|
|
adamc@1
|
68
|
|
adamc@1
|
69 fun posOf n =
|
|
adamc@1
|
70 let
|
|
adamc@1
|
71 fun search lineNum lines =
|
|
adamc@1
|
72 case lines of
|
|
adamc@1
|
73 [] => {line = 1,
|
|
adamc@1
|
74 char = n}
|
|
adamc@1
|
75 | bound :: rest =>
|
|
adamc@1
|
76 if n > bound then
|
|
adamc@1
|
77 {line = lineNum,
|
|
adamc@1
|
78 char = n - bound - 1}
|
|
adamc@1
|
79 else
|
|
adamc@1
|
80 search (lineNum - 1) rest
|
|
adamc@1
|
81 in
|
|
adamc@1
|
82 search (!numLines) (!lines)
|
|
adamc@1
|
83 end
|
|
adamc@1
|
84
|
|
adamc@1
|
85 fun spanOf (pos1, pos2) = {file = !file,
|
|
adamc@1
|
86 first = posOf pos1,
|
|
adamc@1
|
87 last = posOf pos2}
|
|
adamc@1
|
88
|
|
adamc@1
|
89
|
|
adamc@1
|
90 val errors = ref false
|
|
adamc@1
|
91
|
|
adamc@1
|
92 fun resetErrors () = errors := false
|
|
adamc@1
|
93 fun anyErrors () = !errors
|
|
adamc@1
|
94 fun error s = (TextIO.output (TextIO.stdErr, s);
|
|
adamc@1
|
95 TextIO.output1 (TextIO.stdErr, #"\n");
|
|
adamc@1
|
96 errors := true)
|
|
adamc@1
|
97 fun errorAt span s = (TextIO.output (TextIO.stdErr, spanToString span);
|
|
adamc@1
|
98 TextIO.output1 (TextIO.stdErr, #" ");
|
|
adamc@1
|
99 error s)
|
|
adamc@1
|
100 fun errorAt' span s = errorAt (spanOf span) s
|
|
adamc@1
|
101
|
|
adamc@0
|
102 end
|
