diff options
Diffstat (limited to 'libcpp/line-map.c')
| -rw-r--r-- | libcpp/line-map.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/libcpp/line-map.c b/libcpp/line-map.c index e6dd48d..1ace4c9 100644 --- a/libcpp/line-map.c +++ b/libcpp/line-map.c @@ -199,6 +199,8 @@ linemap_line_start (struct line_maps *set, unsigned int to_line, int column_bits; if (max_column_hint > 100000 || highest > 0xC0000000) { + /* If the column number is ridiculous or we've allocated a huge + number of source_locations, give up on column numbers. */ max_column_hint = 0; if (highest >0xF0000000) return 0; @@ -211,13 +213,15 @@ linemap_line_start (struct line_maps *set, unsigned int to_line, column_bits++; max_column_hint = 1U << column_bits; } + /* Allocate the new line_map. However, if the current map only has a + single line we can sometimes just increase its column_bits instead. */ if (line_delta < 0 || last_line != map->to_line || SOURCE_COLUMN (map, highest) >= (1U << column_bits)) map = (struct line_map*) linemap_add (set, LC_RENAME, map->sysp, map->to_file, to_line); map->column_bits = column_bits; - r = map->start_location; + r = map->start_location + ((to_line - map->to_line) << column_bits); } else r = highest - SOURCE_COLUMN (map, highest) |