66 lines
1.9 KiB
Rust
66 lines
1.9 KiB
Rust
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import std._vec;
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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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type filemap = @rec(str name,
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uint start_pos,
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mutable vec[uint] lines);
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type codemap = @rec(mutable vec[filemap] files);
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type loc = rec(str filename, uint line, uint col);
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fn new_codemap() -> codemap {
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let vec[filemap] files = vec();
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ret @rec(mutable files=files);
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}
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fn new_filemap(str filename, uint start_pos) -> filemap {
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let vec[uint] lines = vec();
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ret @rec(name=filename,
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start_pos=start_pos,
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mutable lines=lines);
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}
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fn next_line(filemap file, uint pos) {
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_vec.push[uint](file.lines, pos);
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}
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fn lookup_pos(codemap map, uint pos) -> loc {
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for (filemap f in map.files) {
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if (f.start_pos < pos) {
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auto line_num = 1u;
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auto line_start = 0u;
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// FIXME this can be a binary search if we need to be faster
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for (uint line_start_ in f.lines) {
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// FIXME duplicate code due to lack of working break
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if (line_start_ > pos) {
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ret rec(filename=f.name,
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line=line_num,
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col=pos-line_start);
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}
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line_start = line_start_;
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line_num += 1u;
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}
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ret rec(filename=f.name,
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line=line_num,
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col=pos-line_start);
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}
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}
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log #fmt("Failed to find a location for character %u", pos);
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fail;
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}
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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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// compile-command: "make -k -C $RBUILD 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
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// End:
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//
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