2011-12-13 18:25:51 -06:00
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import core::{vec, uint, str, option, result};
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import option::{some, none};
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2011-07-05 04:48:19 -05:00
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2011-09-02 17:34:58 -05:00
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type filename = str;
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2011-07-05 04:48:19 -05:00
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2011-07-27 07:19:39 -05:00
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type file_pos = {ch: uint, byte: uint};
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2011-07-16 01:01:10 -05:00
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2011-07-05 04:48:19 -05:00
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/* A codemap is a thing that maps uints to file/line/column positions
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* in a crate. This to make it possible to represent the positions
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* with single-word things, rather than passing records all over the
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* compiler.
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*/
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2011-07-27 07:19:39 -05:00
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type filemap =
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2011-08-04 18:20:09 -05:00
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@{name: filename, start_pos: file_pos, mutable lines: [file_pos]};
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2011-07-05 04:48:19 -05:00
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2011-08-04 18:20:09 -05:00
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type codemap = @{mutable files: [filemap]};
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2011-07-05 04:48:19 -05:00
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2011-07-27 07:19:39 -05:00
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type loc = {filename: filename, line: uint, col: uint};
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2011-07-05 04:48:19 -05:00
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2011-08-19 17:16:48 -05:00
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fn new_codemap() -> codemap { ret @{mutable files: []}; }
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2011-07-16 01:01:10 -05:00
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2011-07-27 07:19:39 -05:00
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fn new_filemap(filename: filename, start_pos_ch: uint, start_pos_byte: uint)
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-> filemap {
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ret @{name: filename,
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start_pos: {ch: start_pos_ch, byte: start_pos_byte},
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2011-08-19 17:16:48 -05:00
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mutable lines: [{ch: start_pos_ch, byte: start_pos_byte}]};
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2011-07-05 04:48:19 -05:00
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}
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2011-07-27 07:19:39 -05:00
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fn next_line(file: filemap, chpos: uint, byte_pos: uint) {
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2011-08-19 17:16:48 -05:00
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file.lines += [{ch: chpos, byte: byte_pos}];
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2011-07-05 04:48:19 -05:00
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}
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2012-01-11 11:58:05 -06:00
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type lookup_fn = fn@(file_pos) -> uint;
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2011-07-05 04:48:19 -05:00
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2011-07-27 07:19:39 -05:00
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fn lookup_pos(map: codemap, pos: uint, lookup: lookup_fn) -> loc {
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2011-12-20 15:38:10 -06:00
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let len = vec::len(map.files);
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2011-12-21 05:50:45 -06:00
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if len > 1u && map.files[len - 1u].name == "-" {
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// the trailing "-" must be the core_macros inserted by expand_crate,
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// exclude it from the targets to lookup
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len = len - 1u;
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}
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2011-07-27 07:19:39 -05:00
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let a = 0u;
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2011-12-20 15:38:10 -06:00
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let b = len;
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2011-07-27 07:19:39 -05:00
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while b - a > 1u {
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let m = (a + b) / 2u;
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2011-08-19 17:16:48 -05:00
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if lookup(map.files[m].start_pos) > pos { b = m; } else { a = m; }
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2011-07-05 04:48:19 -05:00
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}
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2011-08-19 17:16:48 -05:00
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let f = map.files[a];
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2011-07-05 04:48:19 -05:00
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a = 0u;
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2011-08-15 18:38:23 -05:00
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b = vec::len(f.lines);
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2011-07-27 07:19:39 -05:00
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while b - a > 1u {
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let m = (a + b) / 2u;
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2011-08-19 17:16:48 -05:00
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if lookup(f.lines[m]) > pos { b = m; } else { a = m; }
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2011-07-05 04:48:19 -05:00
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}
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2011-08-19 17:16:48 -05:00
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ret {filename: f.name, line: a + 1u, col: pos - lookup(f.lines[a])};
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2011-07-16 01:01:10 -05:00
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}
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2011-07-27 07:19:39 -05:00
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fn lookup_char_pos(map: codemap, pos: uint) -> loc {
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fn lookup(pos: file_pos) -> uint { ret pos.ch; }
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2011-07-16 01:01:10 -05:00
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ret lookup_pos(map, pos, lookup);
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}
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2011-07-27 07:19:39 -05:00
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fn lookup_byte_pos(map: codemap, pos: uint) -> loc {
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fn lookup(pos: file_pos) -> uint { ret pos.byte; }
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2011-07-16 01:01:10 -05:00
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ret lookup_pos(map, pos, lookup);
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2011-07-05 04:48:19 -05:00
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}
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2011-08-19 17:16:48 -05:00
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tag opt_span {
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2011-09-02 17:34:58 -05:00
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//hack (as opposed to option::t), to make `span` compile
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2011-08-12 10:57:21 -05:00
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os_none;
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os_some(@span);
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}
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type span = {lo: uint, hi: uint, expanded_from: opt_span};
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2011-07-05 04:48:19 -05:00
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2011-09-12 04:27:30 -05:00
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fn span_to_str(sp: span, cm: codemap) -> str {
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2011-08-12 10:57:21 -05:00
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let cur = sp;
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2011-09-02 17:34:58 -05:00
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let res = "";
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2011-08-12 10:57:21 -05:00
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let prev_file = none;
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2011-08-19 17:16:48 -05:00
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while true {
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2011-08-12 10:57:21 -05:00
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let lo = lookup_char_pos(cm, cur.lo);
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let hi = lookup_char_pos(cm, cur.hi);
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2011-08-28 02:24:28 -05:00
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res +=
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2011-09-01 20:49:10 -05:00
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#fmt["%s:%u:%u: %u:%u",
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2011-08-19 17:16:48 -05:00
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if some(lo.filename) == prev_file {
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2011-09-02 17:34:58 -05:00
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"-"
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} else { lo.filename }, lo.line, lo.col, hi.line, hi.col];
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2011-08-12 10:57:21 -05:00
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alt cur.expanded_from {
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os_none. { break; }
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os_some(new_sp) {
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cur = *new_sp;
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prev_file = some(lo.filename);
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2011-09-02 17:34:58 -05:00
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res += "<<";
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2011-08-12 10:57:21 -05:00
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}
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}
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}
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ret res;
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2011-07-05 04:48:19 -05:00
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}
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2011-09-02 17:34:58 -05:00
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type file_lines = {name: str, lines: [uint]};
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2011-07-11 01:27:03 -05:00
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2011-07-27 07:19:39 -05:00
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fn span_to_lines(sp: span, cm: codemap::codemap) -> @file_lines {
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let lo = lookup_char_pos(cm, sp.lo);
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let hi = lookup_char_pos(cm, sp.hi);
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2011-08-19 17:16:48 -05:00
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let lines = [];
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2011-10-21 05:31:48 -05:00
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uint::range(lo.line - 1u, hi.line as uint) {|i| lines += [i]; };
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2011-08-27 16:57:47 -05:00
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ret @{name: lo.filename, lines: lines};
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2011-07-11 01:27:03 -05:00
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}
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2011-09-12 04:27:30 -05:00
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fn get_line(fm: filemap, line: int, file: str) -> str {
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2011-08-19 17:16:48 -05:00
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let begin: uint = fm.lines[line].byte - fm.start_pos.byte;
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2011-07-27 07:19:39 -05:00
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let end: uint;
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2011-08-15 18:38:23 -05:00
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if line as uint < vec::len(fm.lines) - 1u {
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2011-08-19 17:16:48 -05:00
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end = fm.lines[line + 1].byte - fm.start_pos.byte;
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2011-07-13 14:19:59 -05:00
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} else {
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// If we're not done parsing the file, we're at the limit of what's
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// parsed. If we just slice the rest of the string, we'll print out
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// the remainder of the file, which is undesirable.
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2011-09-01 19:27:58 -05:00
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end = str::byte_len(file);
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let rest = str::slice(file, begin, end);
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let newline = str::index(rest, '\n' as u8);
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2011-07-27 07:19:39 -05:00
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if newline != -1 { end = begin + (newline as uint); }
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2011-07-11 01:27:03 -05:00
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}
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2011-09-01 19:27:58 -05:00
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ret str::slice(file, begin, end);
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2011-07-11 01:27:03 -05:00
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}
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2011-09-02 17:34:58 -05:00
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fn get_filemap(cm: codemap, filename: str) -> filemap {
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for fm: filemap in cm.files { if fm.name == filename { ret fm; } }
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2011-07-11 01:27:03 -05:00
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//XXjdm the following triggers a mismatched type bug
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// (or expected function, found _|_)
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2011-07-27 07:19:39 -05:00
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fail; // ("asking for " + filename + " which we don't know about");
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2011-07-11 01:27:03 -05:00
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}
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2011-07-05 04:48:19 -05:00
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//
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// Local Variables:
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// mode: rust
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// End:
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//
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