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Diffstat (limited to 'plugins/SmartAutoReplier/lualib/ltable.c')
-rw-r--r--plugins/SmartAutoReplier/lualib/ltable.c509
1 files changed, 0 insertions, 509 deletions
diff --git a/plugins/SmartAutoReplier/lualib/ltable.c b/plugins/SmartAutoReplier/lualib/ltable.c
deleted file mode 100644
index 0c64adb10a..0000000000
--- a/plugins/SmartAutoReplier/lualib/ltable.c
+++ /dev/null
@@ -1,509 +0,0 @@
-/*
-** $Id: ltable.c,v 1.132 2003/04/03 13:35:34 roberto Exp $
-** Lua tables (hash)
-** See Copyright Notice in lua.h
-*/
-
-
-/*
-** Implementation of tables (aka arrays, objects, or hash tables).
-** Tables keep its elements in two parts: an array part and a hash part.
-** Non-negative integer keys are all candidates to be kept in the array
-** part. The actual size of the array is the largest `n' such that at
-** least half the slots between 0 and n are in use.
-** Hash uses a mix of chained scatter table with Brent's variation.
-** A main invariant of these tables is that, if an element is not
-** in its main position (i.e. the `original' position that its hash gives
-** to it), then the colliding element is in its own main position.
-** In other words, there are collisions only when two elements have the
-** same main position (i.e. the same hash values for that table size).
-** Because of that, the load factor of these tables can be 100% without
-** performance penalties.
-*/
-
-#include <string.h>
-
-#define ltable_c
-
-#include "lua.h"
-
-#include "ldebug.h"
-#include "ldo.h"
-#include "lgc.h"
-#include "lmem.h"
-#include "lobject.h"
-#include "lstate.h"
-#include "ltable.h"
-
-
-/*
-** max size of array part is 2^MAXBITS
-*/
-#if BITS_INT > 26
-#define MAXBITS 24
-#else
-#define MAXBITS (BITS_INT-2)
-#endif
-
-/* check whether `x' < 2^MAXBITS */
-#define toobig(x) ((((x)-1) >> MAXBITS) != 0)
-
-
-/* function to convert a lua_Number to int (with any rounding method) */
-#ifndef lua_number2int
-#define lua_number2int(i,n) ((i)=(int)(n))
-#endif
-
-
-#define hashpow2(t,n) (gnode(t, lmod((n), sizenode(t))))
-
-#define hashstr(t,str) hashpow2(t, (str)->tsv.hash)
-#define hashboolean(t,p) hashpow2(t, p)
-
-
-/*
-** for some types, it is better to avoid modulus by power of 2, as
-** they tend to have many 2 factors.
-*/
-#define hashmod(t,n) (gnode(t, ((n) % ((sizenode(t)-1)|1))))
-
-
-#define hashpointer(t,p) hashmod(t, IntPoint(p))
-
-
-/*
-** number of ints inside a lua_Number
-*/
-#define numints cast(int, sizeof(lua_Number)/sizeof(int))
-
-
-/*
-** hash for lua_Numbers
-*/
-static Node *hashnum (const Table *t, lua_Number n) {
- unsigned int a[numints];
- int i;
- n += 1; /* normalize number (avoid -0) */
- lua_assert(sizeof(a) <= sizeof(n));
- memcpy(a, &n, sizeof(a));
- for (i = 1; i < numints; i++) a[0] += a[i];
- return hashmod(t, cast(lu_hash, a[0]));
-}
-
-
-
-/*
-** returns the `main' position of an element in a table (that is, the index
-** of its hash value)
-*/
-Node *luaH_mainposition (const Table *t, const TObject *key) {
- switch (ttype(key)) {
- case LUA_TNUMBER:
- return hashnum(t, nvalue(key));
- case LUA_TSTRING:
- return hashstr(t, tsvalue(key));
- case LUA_TBOOLEAN:
- return hashboolean(t, bvalue(key));
- case LUA_TLIGHTUSERDATA:
- return hashpointer(t, pvalue(key));
- default:
- return hashpointer(t, gcvalue(key));
- }
-}
-
-
-/*
-** returns the index for `key' if `key' is an appropriate key to live in
-** the array part of the table, -1 otherwise.
-*/
-static int arrayindex (const TObject *key) {
- if (ttisnumber(key)) {
- int k;
- lua_number2int(k, (nvalue(key)));
- if (cast(lua_Number, k) == nvalue(key) && k >= 1 && !toobig(k))
- return k;
- }
- return -1; /* `key' did not match some condition */
-}
-
-
-/*
-** returns the index of a `key' for table traversals. First goes all
-** elements in the array part, then elements in the hash part. The
-** beginning and end of a traversal are signalled by -1.
-*/
-static int luaH_index (lua_State *L, Table *t, StkId key) {
- int i;
- if (ttisnil(key)) return -1; /* first iteration */
- i = arrayindex(key);
- if (0 <= i && i <= t->sizearray) { /* is `key' inside array part? */
- return i-1; /* yes; that's the index (corrected to C) */
- }
- else {
- const TObject *v = luaH_get(t, key);
- if (v == &luaO_nilobject)
- luaG_runerror(L, "invalid key for `next'");
- i = cast(int, (cast(const lu_byte *, v) -
- cast(const lu_byte *, gval(gnode(t, 0)))) / sizeof(Node));
- return i + t->sizearray; /* hash elements are numbered after array ones */
- }
-}
-
-
-int luaH_next (lua_State *L, Table *t, StkId key) {
- int i = luaH_index(L, t, key); /* find original element */
- for (i++; i < t->sizearray; i++) { /* try first array part */
- if (!ttisnil(&t->array[i])) { /* a non-nil value? */
- setnvalue(key, cast(lua_Number, i+1));
- setobj2s(key+1, &t->array[i]);
- return 1;
- }
- }
- for (i -= t->sizearray; i < sizenode(t); i++) { /* then hash part */
- if (!ttisnil(gval(gnode(t, i)))) { /* a non-nil value? */
- setobj2s(key, gkey(gnode(t, i)));
- setobj2s(key+1, gval(gnode(t, i)));
- return 1;
- }
- }
- return 0; /* no more elements */
-}
-
-
-/*
-** {=============================================================
-** Rehash
-** ==============================================================
-*/
-
-
-static void computesizes (int nums[], int ntotal, int *narray, int *nhash) {
- int i;
- int a = nums[0]; /* number of elements smaller than 2^i */
- int na = a; /* number of elements to go to array part */
- int n = (na == 0) ? -1 : 0; /* (log of) optimal size for array part */
- for (i = 1; a < *narray && *narray >= twoto(i-1); i++) {
- if (nums[i] > 0) {
- a += nums[i];
- if (a >= twoto(i-1)) { /* more than half elements in use? */
- n = i;
- na = a;
- }
- }
- }
- lua_assert(na <= *narray && *narray <= ntotal);
- *nhash = ntotal - na;
- *narray = (n == -1) ? 0 : twoto(n);
- lua_assert(na <= *narray && na >= *narray/2);
-}
-
-
-static void numuse (const Table *t, int *narray, int *nhash) {
- int nums[MAXBITS+1];
- int i, lg;
- int totaluse = 0;
- /* count elements in array part */
- for (i=0, lg=0; lg<=MAXBITS; lg++) { /* for each slice [2^(lg-1) to 2^lg) */
- int ttlg = twoto(lg); /* 2^lg */
- if (ttlg > t->sizearray) {
- ttlg = t->sizearray;
- if (i >= ttlg) break;
- }
- nums[lg] = 0;
- for (; i<ttlg; i++) {
- if (!ttisnil(&t->array[i])) {
- nums[lg]++;
- totaluse++;
- }
- }
- }
- for (; lg<=MAXBITS; lg++) nums[lg] = 0; /* reset other counts */
- *narray = totaluse; /* all previous uses were in array part */
- /* count elements in hash part */
- i = sizenode(t);
- while (i--) {
- Node *n = &t->node[i];
- if (!ttisnil(gval(n))) {
- int k = arrayindex(gkey(n));
- if (k >= 0) { /* is `key' an appropriate array index? */
- nums[luaO_log2(k-1)+1]++; /* count as such */
- (*narray)++;
- }
- totaluse++;
- }
- }
- computesizes(nums, totaluse, narray, nhash);
-}
-
-
-static void setarrayvector (lua_State *L, Table *t, int size) {
- int i;
- luaM_reallocvector(L, t->array, t->sizearray, size, TObject);
- for (i=t->sizearray; i<size; i++)
- setnilvalue(&t->array[i]);
- t->sizearray = size;
-}
-
-
-static void setnodevector (lua_State *L, Table *t, int lsize) {
- int i;
- int size = twoto(lsize);
- if (lsize > MAXBITS)
- luaG_runerror(L, "table overflow");
- if (lsize == 0) { /* no elements to hash part? */
- t->node = G(L)->dummynode; /* use common `dummynode' */
- lua_assert(ttisnil(gkey(t->node))); /* assert invariants: */
- lua_assert(ttisnil(gval(t->node)));
- lua_assert(t->node->next == NULL); /* (`dummynode' must be empty) */
- }
- else {
- t->node = luaM_newvector(L, size, Node);
- for (i=0; i<size; i++) {
- t->node[i].next = NULL;
- setnilvalue(gkey(gnode(t, i)));
- setnilvalue(gval(gnode(t, i)));
- }
- }
- t->lsizenode = cast(lu_byte, lsize);
- t->firstfree = gnode(t, size-1); /* first free position to be used */
-}
-
-
-static void resize (lua_State *L, Table *t, int nasize, int nhsize) {
- int i;
- int oldasize = t->sizearray;
- int oldhsize = t->lsizenode;
- Node *nold;
- Node temp[1];
- if (oldhsize)
- nold = t->node; /* save old hash ... */
- else { /* old hash is `dummynode' */
- lua_assert(t->node == G(L)->dummynode);
- temp[0] = t->node[0]; /* copy it to `temp' */
- nold = temp;
- setnilvalue(gkey(G(L)->dummynode)); /* restate invariant */
- setnilvalue(gval(G(L)->dummynode));
- lua_assert(G(L)->dummynode->next == NULL);
- }
- if (nasize > oldasize) /* array part must grow? */
- setarrayvector(L, t, nasize);
- /* create new hash part with appropriate size */
- setnodevector(L, t, nhsize);
- /* re-insert elements */
- if (nasize < oldasize) { /* array part must shrink? */
- t->sizearray = nasize;
- /* re-insert elements from vanishing slice */
- for (i=nasize; i<oldasize; i++) {
- if (!ttisnil(&t->array[i]))
- setobjt2t(luaH_setnum(L, t, i+1), &t->array[i]);
- }
- /* shrink array */
- luaM_reallocvector(L, t->array, oldasize, nasize, TObject);
- }
- /* re-insert elements in hash part */
- for (i = twoto(oldhsize) - 1; i >= 0; i--) {
- Node *old = nold+i;
- if (!ttisnil(gval(old)))
- setobjt2t(luaH_set(L, t, gkey(old)), gval(old));
- }
- if (oldhsize)
- luaM_freearray(L, nold, twoto(oldhsize), Node); /* free old array */
-}
-
-
-static void rehash (lua_State *L, Table *t) {
- int nasize, nhsize;
- numuse(t, &nasize, &nhsize); /* compute new sizes for array and hash parts */
- resize(L, t, nasize, luaO_log2(nhsize)+1);
-}
-
-
-
-/*
-** }=============================================================
-*/
-
-
-Table *luaH_new (lua_State *L, int narray, int lnhash) {
- Table *t = luaM_new(L, Table);
- luaC_link(L, valtogco(t), LUA_TTABLE);
- t->metatable = hvalue(defaultmeta(L));
- t->flags = cast(lu_byte, ~0);
- /* temporary values (kept only if some malloc fails) */
- t->array = NULL;
- t->sizearray = 0;
- t->lsizenode = 0;
- t->node = NULL;
- setarrayvector(L, t, narray);
- setnodevector(L, t, lnhash);
- return t;
-}
-
-
-void luaH_free (lua_State *L, Table *t) {
- if (t->lsizenode)
- luaM_freearray(L, t->node, sizenode(t), Node);
- luaM_freearray(L, t->array, t->sizearray, TObject);
- luaM_freelem(L, t);
-}
-
-
-#if 0
-/*
-** try to remove an element from a hash table; cannot move any element
-** (because gc can call `remove' during a table traversal)
-*/
-void luaH_remove (Table *t, Node *e) {
- Node *mp = luaH_mainposition(t, gkey(e));
- if (e != mp) { /* element not in its main position? */
- while (mp->next != e) mp = mp->next; /* find previous */
- mp->next = e->next; /* remove `e' from its list */
- }
- else {
- if (e->next != NULL) ??
- }
- lua_assert(ttisnil(gval(node)));
- setnilvalue(gkey(e)); /* clear node `e' */
- e->next = NULL;
-}
-#endif
-
-
-/*
-** inserts a new key into a hash table; first, check whether key's main
-** position is free. If not, check whether colliding node is in its main
-** position or not: if it is not, move colliding node to an empty place and
-** put new key in its main position; otherwise (colliding node is in its main
-** position), new key goes to an empty position.
-*/
-static TObject *newkey (lua_State *L, Table *t, const TObject *key) {
- TObject *val;
- Node *mp = luaH_mainposition(t, key);
- if (!ttisnil(gval(mp))) { /* main position is not free? */
- Node *othern = luaH_mainposition(t, gkey(mp)); /* `mp' of colliding node */
- Node *n = t->firstfree; /* get a free place */
- if (othern != mp) { /* is colliding node out of its main position? */
- /* yes; move colliding node into free position */
- while (othern->next != mp) othern = othern->next; /* find previous */
- othern->next = n; /* redo the chain with `n' in place of `mp' */
- *n = *mp; /* copy colliding node into free pos. (mp->next also goes) */
- mp->next = NULL; /* now `mp' is free */
- setnilvalue(gval(mp));
- }
- else { /* colliding node is in its own main position */
- /* new node will go into free position */
- n->next = mp->next; /* chain new position */
- mp->next = n;
- mp = n;
- }
- }
- setobj2t(gkey(mp), key); /* write barrier */
- lua_assert(ttisnil(gval(mp)));
- for (;;) { /* correct `firstfree' */
- if (ttisnil(gkey(t->firstfree)))
- return gval(mp); /* OK; table still has a free place */
- else if (t->firstfree == t->node) break; /* cannot decrement from here */
- else (t->firstfree)--;
- }
- /* no more free places; must create one */
- setbvalue(gval(mp), 0); /* avoid new key being removed */
- rehash(L, t); /* grow table */
- val = cast(TObject *, luaH_get(t, key)); /* get new position */
- lua_assert(ttisboolean(val));
- setnilvalue(val);
- return val;
-}
-
-
-/*
-** generic search function
-*/
-static const TObject *luaH_getany (Table *t, const TObject *key) {
- if (ttisnil(key)) return &luaO_nilobject;
- else {
- Node *n = luaH_mainposition(t, key);
- do { /* check whether `key' is somewhere in the chain */
- if (luaO_rawequalObj(gkey(n), key)) return gval(n); /* that's it */
- else n = n->next;
- } while (n);
- return &luaO_nilobject;
- }
-}
-
-
-/*
-** search function for integers
-*/
-const TObject *luaH_getnum (Table *t, int key) {
- if (1 <= key && key <= t->sizearray)
- return &t->array[key-1];
- else {
- lua_Number nk = cast(lua_Number, key);
- Node *n = hashnum(t, nk);
- do { /* check whether `key' is somewhere in the chain */
- if (ttisnumber(gkey(n)) && nvalue(gkey(n)) == nk)
- return gval(n); /* that's it */
- else n = n->next;
- } while (n);
- return &luaO_nilobject;
- }
-}
-
-
-/*
-** search function for strings
-*/
-const TObject *luaH_getstr (Table *t, TString *key) {
- Node *n = hashstr(t, key);
- do { /* check whether `key' is somewhere in the chain */
- if (ttisstring(gkey(n)) && tsvalue(gkey(n)) == key)
- return gval(n); /* that's it */
- else n = n->next;
- } while (n);
- return &luaO_nilobject;
-}
-
-
-/*
-** main search function
-*/
-const TObject *luaH_get (Table *t, const TObject *key) {
- switch (ttype(key)) {
- case LUA_TSTRING: return luaH_getstr(t, tsvalue(key));
- case LUA_TNUMBER: {
- int k;
- lua_number2int(k, (nvalue(key)));
- if (cast(lua_Number, k) == nvalue(key)) /* is an integer index? */
- return luaH_getnum(t, k); /* use specialized version */
- /* else go through */
- }
- default: return luaH_getany(t, key);
- }
-}
-
-
-TObject *luaH_set (lua_State *L, Table *t, const TObject *key) {
- const TObject *p = luaH_get(t, key);
- t->flags = 0;
- if (p != &luaO_nilobject)
- return cast(TObject *, p);
- else {
- if (ttisnil(key)) luaG_runerror(L, "table index is nil");
- else if (ttisnumber(key) && nvalue(key) != nvalue(key))
- luaG_runerror(L, "table index is NaN");
- return newkey(L, t, key);
- }
-}
-
-
-TObject *luaH_setnum (lua_State *L, Table *t, int key) {
- const TObject *p = luaH_getnum(t, key);
- if (p != &luaO_nilobject)
- return cast(TObject *, p);
- else {
- TObject k;
- setnvalue(&k, cast(lua_Number, key));
- return newkey(L, t, &k);
- }
-}
-
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