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re PR preprocessor/20907 (long comments throw off line numbers)

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PR preprocessor/20907
	* line-map.c (linemap_line_start): Fix bug when we need to increse
	column_bits but can re-use the current line_map.

From-SVN: r98515
This commit is contained in:
Per Bothner 2005-04-21 10:08:27 -07:00 committed by Per Bothner
parent 1c28033707
commit c1fc50476c
2 changed files with 11 additions and 1 deletions
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6
libcpp/ChangeLog
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@ -1,3 +1,9 @@
2005-04-19 Per Bothner <per@bothner.com>
PR preprocessor/20907
* line-map.c (linemap_line_start): Fix bug when we need to increse
column_bits but can re-use the current line_map.
2005-04-19 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* system.h (fopen, fdopen, freopen): Define these to the unlocked

6
libcpp/line-map.c
View File

@ -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)