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(simple_search): Avoid CHAR_TO_BYTE in inner loop when

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searching backwards through multibyte buffer.
This commit is contained in:
Andreas Schwab 2009-11-22 12:11:00 +00:00
parent 433d9ace74
commit 8b264ecb46
2 changed files with 17 additions and 15 deletions
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5
src/ChangeLog
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@ -1,3 +1,8 @@
2009-11-22 Andreas Schwab <schwab@linux-m68k.org>
* search.c (simple_search): Avoid CHAR_TO_BYTE in inner loop when
searching backwards through multibyte buffer.
2009-11-21 Jan Djärv <jan.h.d@swipnet.se>
* xterm.c: #include xgselect.h.

27
src/search.c
View file

@ -1609,39 +1609,36 @@ simple_search (n, pat, len, len_byte, trt, pos, pos_byte, lim, lim_byte)
while (1)
{
/* Try matching at position POS. */
EMACS_INT this_pos = pos - len;
EMACS_INT this_pos_byte;
EMACS_INT this_pos = pos;
EMACS_INT this_pos_byte = pos_byte;
int this_len = len;
unsigned char *p = pat;
unsigned char *p = pat + len_byte;
if (this_pos < lim || (pos_byte - len_byte) < lim_byte)
if (this_pos - len < lim || (pos_byte - len_byte) < lim_byte)
goto stop;
this_pos_byte = CHAR_TO_BYTE (this_pos);
match_byte = pos_byte - this_pos_byte;
while (this_len > 0)
{
int charlen, buf_charlen;
int charlen;
int pat_ch, buf_ch;
pat_ch = STRING_CHAR_AND_LENGTH (p, charlen);
buf_ch = STRING_CHAR_AND_LENGTH (BYTE_POS_ADDR (this_pos_byte),
buf_charlen);
DEC_BOTH (this_pos, this_pos_byte);
PREV_CHAR_BOUNDARY (p, pat);
pat_ch = STRING_CHAR (p);
buf_ch = STRING_CHAR (BYTE_POS_ADDR (this_pos_byte));
TRANSLATE (buf_ch, trt, buf_ch);
if (buf_ch != pat_ch)
break;
this_len--;
p += charlen;
this_pos_byte += buf_charlen;
this_pos++;
}
if (this_len == 0)
{
pos -= len;
pos_byte -= match_byte;
match_byte = pos_byte - this_pos_byte;
pos = this_pos;
pos_byte = this_pos_byte;
break;
}