reserved words are stored in main string table; "marked" field is

used to indicate its type.
Table initializations centralized by "tree.c".
This commit is contained in:
Roberto Ierusalimschy
1996-02-14 10:35:51 -03:00
parent 0f4903a5d7
commit d1608c597e
6 changed files with 79 additions and 74 deletions

27
tree.c
View File

@@ -3,7 +3,7 @@
** TecCGraf - PUC-Rio
*/
char *rcs_tree="$Id: tree.c,v 1.15 1996/01/26 18:03:19 roberto Exp $";
char *rcs_tree="$Id: tree.c,v 1.16 1996/02/12 18:32:40 roberto Exp roberto $";
#include <string.h>
@@ -11,6 +11,7 @@ char *rcs_tree="$Id: tree.c,v 1.15 1996/01/26 18:03:19 roberto Exp $";
#include "mem.h"
#include "lua.h"
#include "tree.h"
#include "lex.h"
#include "hash.h"
#include "table.h"
@@ -25,10 +26,13 @@ typedef struct {
TaggedString **hash;
} stringtable;
static int initialized = 0;
static stringtable string_root[NUM_HASHS];
static TaggedString EMPTY = {NOT_USED, NOT_USED, 0, 0, {0}};
static unsigned long hash (char *str)
{
unsigned long h = 0;
@@ -37,6 +41,15 @@ static unsigned long hash (char *str)
return h;
}
static void initialize (void)
{
initialized = 1;
luaI_addReserved();
luaI_initsymbol();
luaI_initconstant();
}
static void grow (stringtable *tb)
{
int newsize = luaI_redimension(tb->size);
@@ -69,7 +82,11 @@ static TaggedString *insert (char *str, stringtable *tb)
int i;
int j = -1;
if ((Long)tb->nuse*3 >= (Long)tb->size*2)
{
if (!initialized)
initialize();
grow(tb);
}
i = h%tb->size;
while (tb->hash[i])
{
@@ -97,12 +114,6 @@ TaggedString *lua_createstring (char *str)
return insert(str, &string_root[(unsigned)str[0]%NUM_HASHS]);
}
TaggedString *luaI_createfixedstring (char *str)
{
TaggedString *ts = lua_createstring(str);
ts->marked = 2; /* to avoid GC */
return ts;
}
/*
** Garbage collection function.
@@ -119,7 +130,7 @@ Long lua_strcollector (void)
for (j=0; j<tb->size; j++)
{
TaggedString *t = tb->hash[j];
if (t != NULL && t != &EMPTY && t->marked != 2)
if (t != NULL && t != &EMPTY && t->marked <= 1)
{
if (t->marked)
t->marked = 0;