mirror/flex
1
0
Fork 0
mirror of https://github.com/westes/flex.git synced 2026-01-27 01:44:23 +00:00
Code Issues Packages Projects Releases Wiki Activity

optimize yy_get_next_buffer by switching to memmove

Browse Source 
based on https://lists.defectivebydesign.org/archive/html/help-flex/2013-01/msg00000.html
This commit is contained in:
John Lindal 2024-04-26 11:27:01 -07:00 committed by Will Estes
parent 68eb57857f
commit b012df90bb
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/c99-flex.skl
View File

@ -1079,9 +1079,9 @@ static int yy_get_next_buffer (yyscan_t yyscanner)
/* First move last chars to start of buffer. */
number_to_move = (int) (yyscanner->yy_c_buf_p - yyscanner->yytext_ptr - 1);
for ( i = 0; i < number_to_move; ++i ) {
*(dest++) = *(source++);
}
if (number_to_move > 0)
memmove(dest, source, number_to_move * sizeof(*source));
if ( yyscanner->yy_buffer_stack[yyscanner->yy_buffer_stack_top]->yy_buffer_status == YY_BUFFER_EOF_PENDING ) {
/* don't do the read, it's not guaranteed to return an EOF,
* just force an EOF