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small optimization in luaL_addlstring (avoid adding chars one by one)

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(suggested by Chuck Coffing)
This commit is contained in:
Roberto Ierusalimschy 2010-03-12 15:59:32 -03:00
parent 1124cb1247
commit f292760f12
1 changed files with 14 additions and 3 deletions
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17
lauxlib.c
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@ -1,5 +1,5 @@
/*
** $Id: lauxlib.c,v 1.200 2010/02/18 19:32:41 roberto Exp roberto $
** $Id: lauxlib.c,v 1.201 2010/02/18 19:37:57 roberto Exp roberto $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/
@ -393,8 +393,19 @@ LUALIB_API char *luaL_prepbuffer (luaL_Buffer *B) {
LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) {
while (l--)
luaL_addchar(B, *s++);
while (l) {
size_t space = bufffree(B);
if (space == 0) {
luaL_prepbuffer(B);
lua_assert(bufffree(B) == LUAL_BUFFERSIZE);
space = LUAL_BUFFERSIZE;
}
if (space > l) space = l;
memcpy(B->p, s, space);
B->p += space;
s += space;
l -= space;
}
}