commit a76fa251998ea83679cfad24542cf4c1aa3d6131
parent dd3519ab89078fb270797332f0d661b5f6b7612a
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Wed, 30 Jan 2008 16:05:00 -0200
'ceillog2' now is exported (other modules may need it)
Diffstat:
3 files changed, 25 insertions(+), 24 deletions(-)
diff --git a/lobject.c b/lobject.c
@@ -1,5 +1,5 @@
/*
-** $Id: lobject.c,v 2.26 2007/11/09 18:54:25 roberto Exp roberto $
+** $Id: lobject.c,v 2.27 2007/12/19 17:24:38 roberto Exp roberto $
** Some generic functions over Lua objects
** See Copyright Notice in lua.h
*/
@@ -33,7 +33,7 @@ const TValue luaO_nilobject_ = {{NULL}, LUA_TNIL};
** (eeeeexxx), where the real value is (1xxx) * 2^(eeeee - 1) if
** eeeee != 0 and (xxx) otherwise.
*/
-int luaO_int2fb (unsigned int x) {
+int luaO_int2fb (lu_int32 x) {
int e = 0; /* exponent */
if (x < 8) return x;
while (x >= 0x10) {
@@ -52,6 +52,24 @@ int luaO_fb2int (int x) {
}
+int luaO_ceillog2 (unsigned int x) {
+ static const lu_byte log_2[256] = {
+ 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
+ 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
+ };
+ int l = 0;
+ x--;
+ while (x >= 256) { l += 8; x >>= 8; }
+ return l + log_2[x];
+}
+
+
int luaO_rawequalObj (const TValue *t1, const TValue *t2) {
if (ttype(t1) != ttype(t2)) return 0;
else switch (ttype(t1)) {
diff --git a/lobject.h b/lobject.h
@@ -1,5 +1,5 @@
/*
-** $Id: lobject.h,v 2.21 2006/09/11 14:07:24 roberto Exp roberto $
+** $Id: lobject.h,v 2.22 2007/04/10 12:18:17 roberto Exp roberto $
** Type definitions for Lua objects
** See Copyright Notice in lua.h
*/
@@ -366,6 +366,7 @@ LUAI_DATA const TValue luaO_nilobject_;
LUAI_FUNC int luaO_int2fb (unsigned int x);
LUAI_FUNC int luaO_fb2int (int x);
+LUAI_FUNC int luaO_ceillog2 (lu_int32 x);
LUAI_FUNC int luaO_rawequalObj (const TValue *t1, const TValue *t2);
LUAI_FUNC int luaO_str2d (const char *s, lua_Number *result);
LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt,
diff --git a/ltable.c b/ltable.c
@@ -1,5 +1,5 @@
/*
-** $Id: ltable.c,v 2.36 2007/04/10 12:18:17 roberto Exp roberto $
+** $Id: ltable.c,v 2.37 2007/04/18 19:24:35 roberto Exp roberto $
** Lua tables (hash)
** See Copyright Notice in lua.h
*/
@@ -186,24 +186,6 @@ int luaH_next (lua_State *L, Table *t, StkId key) {
*/
-static int ceillog2 (unsigned int x) {
- static const lu_byte log_2[256] = {
- 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
- 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
- 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
- 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
- };
- int l = 0;
- x--;
- while (x >= 256) { l += 8; x >>= 8; }
- return l + log_2[x];
-}
-
-
static int computesizes (int nums[], int *narray) {
int i;
int twotoi; /* 2^i */
@@ -229,7 +211,7 @@ static int computesizes (int nums[], int *narray) {
static int countint (const TValue *key, int *nums) {
int k = arrayindex(key);
if (0 < k && k <= MAXASIZE) { /* is `key' an appropriate array index? */
- nums[ceillog2(k)]++; /* count as such */
+ nums[luaO_ceillog2(k)]++; /* count as such */
return 1;
}
else
@@ -295,7 +277,7 @@ static void setnodevector (lua_State *L, Table *t, int size) {
}
else {
int i;
- lsize = ceillog2(size);
+ lsize = luaO_ceillog2(size);
if (lsize > MAXBITS)
luaG_runerror(L, "table overflow");
size = twoto(lsize);
