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Fix codemap.lookup_pos 

Previously, it would place every single location in the first
file of the crate that was parsed.
This commit is contained in:
Marijn Haverbeke 2011-04-09 01:56:08 +02:00
parent 129c8392af
commit c0d0b717ee
1 changed files with 12 additions and 15 deletions
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27
src/comp/front/codemap.rs
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@ -18,10 +18,9 @@ fn new_codemap() -> codemap {
}
fn new_filemap(str filename, uint start_pos) -> filemap {
let vec[uint] lines = vec();
ret @rec(name=filename,
start_pos=start_pos,
mutable lines=lines);
mutable lines=vec(0u));
}
fn next_line(filemap file, uint pos) {
@ -29,24 +28,22 @@ fn next_line(filemap file, uint pos) {
}
fn lookup_pos(codemap map, uint pos) -> loc {
for (filemap f in map.files) {
if (f.start_pos < pos) {
auto line_num = 1u;
auto line_start = 0u;
auto i = _vec.len[filemap](map.files);
while (i > 0u) {
i -= 1u;
auto f = map.files.(i);
if (f.start_pos <= pos) {
// FIXME this can be a binary search if we need to be faster
for (uint line_start_ in f.lines) {
// FIXME duplicate code due to lack of working break
if (line_start_ > pos) {
auto line = _vec.len[uint](f.lines);
while (line > 0u) {
line -= 1u;
auto line_start = f.lines.(line);
if (line_start <= pos) {
ret rec(filename=f.name,
line=line_num,
line=line + 1u,
col=pos-line_start);
}
line_start = line_start_;
line_num += 1u;
}
ret rec(filename=f.name,
line=line_num,
col=pos-line_start);
}
}
log #fmt("Failed to find a location for character %u", pos);