mirrors/emacs
1
Fork 0
mirror of git://git.sv.gnu.org/emacs.git synced 2026-01-07 04:10:27 -08:00
Code Issues Projects Releases Wiki Activity

Don't generate useless range table entries for ASCII chars

Browse source 
In multibyte regexps, each ASCII char or range in a character
alternative produces a nonsense range table entry in addition to the
correct bits in the ASCII bitmap.  Those entries do not match anything
but waste space and time.

* src/regex-emacs.c (regex_compile): Don't generate reversed intervals.
This commit is contained in:
Mattias Engdegård 2020-03-17 13:18:14 +01:00
parent 9dccaf8a5c
commit f189e5dc10
1 changed files with 14 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

25
src/regex-emacs.c
View file

@ -2113,17 +2113,20 @@ regex_compile (re_char *pattern, ptrdiff_t size,
if (CHAR_BYTE8_P (c1))
c = BYTE8_TO_CHAR (128);
}
if (CHAR_BYTE8_P (c))
{
c = CHAR_TO_BYTE8 (c);
c1 = CHAR_TO_BYTE8 (c1);
for (; c <= c1; c++)
SET_LIST_BIT (c);
}
else if (multibyte)
SETUP_MULTIBYTE_RANGE (range_table_work, c, c1);
else
SETUP_UNIBYTE_RANGE (range_table_work, c, c1);
if (c <= c1)
{
if (CHAR_BYTE8_P (c))
{
c = CHAR_TO_BYTE8 (c);
c1 = CHAR_TO_BYTE8 (c1);
for (; c <= c1; c++)
SET_LIST_BIT (c);
}
else if (multibyte)
SETUP_MULTIBYTE_RANGE (range_table_work, c, c1);
else
SETUP_UNIBYTE_RANGE (range_table_work, c, c1);
}
}
}