1 files changed, 0 insertions, 588 deletions

diff --git a/lua-5.1.4/src/ltable.c b/lua-5.1.4/src/ltable.c
deleted file mode 100644
index ec84f4fab..000000000
--- a/lua-5.1.4/src/ltable.c
+++ /dev/null
@@ -1,588 +0,0 @@
-/*
-** $Id: ltable.c,v 2.32.1.2 2007/12/28 15:32:23 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.
-** Hence even when the load factor reaches 100%, performance remains good.
-*/
-
-#include <math.h>
-#include <string.h>
-
-#define ltable_c
-#define LUA_CORE
-
-#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 LUAI_BITSINT > 26
-#define MAXBITS		26
-#else
-#define MAXBITS		(LUAI_BITSINT-2)
-#endif
-
-#define MAXASIZE	(1 << MAXBITS)
-
-
-#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))
-
-
-
-#define dummynode		(&dummynode_)
-
-static const Node dummynode_ = {
-  {{NULL}, LUA_TNIL},  /* value */
-  {{{NULL}, LUA_TNIL, NULL}}  /* key */
-};
-
-
-/*
-** hash for lua_Numbers
-*/
-static Node *hashnum (const Table *t, lua_Number n) {
-  unsigned int a[numints];
-  int i;
-  if (luai_numeq(n, 0))  /* avoid problems with -0 */
-    return gnode(t, 0);
-  memcpy(a, &n, sizeof(a));
-  for (i = 1; i < numints; i++) a[0] += a[i];
-  return hashmod(t, a[0]);
-}
-
-
-
-/*
-** returns the `main' position of an element in a table (that is, the index
-** of its hash value)
-*/
-static Node *mainposition (const Table *t, const TValue *key) {
-  switch (ttype(key)) {
-    case LUA_TNUMBER:
-      return hashnum(t, nvalue(key));
-    case LUA_TSTRING:
-      return hashstr(t, rawtsvalue(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 TValue *key) {
-  if (ttisnumber(key)) {
-    lua_Number n = nvalue(key);
-    int k;
-    lua_number2int(k, n);
-    if (luai_numeq(cast_num(k), n))
-      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 of a traversal is signalled by -1.
-*/
-static int findindex (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 {
-    Node *n = mainposition(t, key);
-    do {  /* check whether `key' is somewhere in the chain */
-      /* key may be dead already, but it is ok to use it in `next' */
-      if (luaO_rawequalObj(key2tval(n), key) ||
-            (ttype(gkey(n)) == LUA_TDEADKEY && iscollectable(key) &&
-             gcvalue(gkey(n)) == gcvalue(key))) {
-        i = cast_int(n - gnode(t, 0));  /* key index in hash table */
-        /* hash elements are numbered after array ones */
-        return i + t->sizearray;
-      }
-      else n = gnext(n);
-    } while (n);
-    luaG_runerror(L, "invalid key to " LUA_QL("next"));  /* key not found */
-    return 0;  /* to avoid warnings */
-  }
-}
-
-
-int luaH_next (lua_State *L, Table *t, StkId key) {
-  int i = findindex(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_num(i+1));
-      setobj2s(L, 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(L, key, key2tval(gnode(t, i)));
-      setobj2s(L, key+1, gval(gnode(t, i)));
-      return 1;
-    }
-  }
-  return 0;  /* no more elements */
-}
-
-
-/*
-** {=============================================================
-** Rehash
-** ==============================================================
-*/
-
-
-static int computesizes (int nums[], int *narray) {
-  int i;
-  int twotoi;  /* 2^i */
-  int a = 0;  /* number of elements smaller than 2^i */
-  int na = 0;  /* number of elements to go to array part */
-  int n = 0;  /* optimal size for array part */
-  for (i = 0, twotoi = 1; twotoi/2 < *narray; i++, twotoi *= 2) {
-    if (nums[i] > 0) {
-      a += nums[i];
-      if (a > twotoi/2) {  /* more than half elements present? */
-        n = twotoi;  /* optimal size (till now) */
-        na = a;  /* all elements smaller than n will go to array part */
-      }
-    }
-    if (a == *narray) break;  /* all elements already counted */
-  }
-  *narray = n;
-  lua_assert(*narray/2 <= na && na <= *narray);
-  return na;
-}
-
-
-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 */
-    return 1;
-  }
-  else
-    return 0;
-}
-
-
-static int numusearray (const Table *t, int *nums) {
-  int lg;
-  int ttlg;  /* 2^lg */
-  int ause = 0;  /* summation of `nums' */
-  int i = 1;  /* count to traverse all array keys */
-  for (lg=0, ttlg=1; lg<=MAXBITS; lg++, ttlg*=2) {  /* for each slice */
-    int lc = 0;  /* counter */
-    int lim = ttlg;
-    if (lim > t->sizearray) {
-      lim = t->sizearray;  /* adjust upper limit */
-      if (i > lim)
-        break;  /* no more elements to count */
-    }
-    /* count elements in range (2^(lg-1), 2^lg] */
-    for (; i <= lim; i++) {
-      if (!ttisnil(&t->array[i-1]))
-        lc++;
-    }
-    nums[lg] += lc;
-    ause += lc;
-  }
-  return ause;
-}
-
-
-static int numusehash (const Table *t, int *nums, int *pnasize) {
-  int totaluse = 0;  /* total number of elements */
-  int ause = 0;  /* summation of `nums' */
-  int i = sizenode(t);
-  while (i--) {
-    Node *n = &t->node[i];
-    if (!ttisnil(gval(n))) {
-      ause += countint(key2tval(n), nums);
-      totaluse++;
-    }
-  }
-  *pnasize += ause;
-  return totaluse;
-}
-
-
-static void setarrayvector (lua_State *L, Table *t, int size) {
-  int i;
-  luaM_reallocvector(L, t->array, t->sizearray, size, TValue);
-  for (i=t->sizearray; i<size; i++)
-     setnilvalue(&t->array[i]);
-  t->sizearray = size;
-}
-
-
-static void setnodevector (lua_State *L, Table *t, int size) {
-  int lsize;
-  if (size == 0) {  /* no elements to hash part? */
-    t->node = cast(Node *, dummynode);  /* use common `dummynode' */
-    lsize = 0;
-  }
-  else {
-    int i;
-    lsize = ceillog2(size);
-    if (lsize > MAXBITS)
-      luaG_runerror(L, "table overflow");
-    size = twoto(lsize);
-    t->node = luaM_newvector(L, size, Node);
-    for (i=0; i<size; i++) {
-      Node *n = gnode(t, i);
-      gnext(n) = NULL;
-      setnilvalue(gkey(n));
-      setnilvalue(gval(n));
-    }
-  }
-  t->lsizenode = cast_byte(lsize);
-  t->lastfree = gnode(t, size);  /* all positions are free */
-}
-
-
-static void resize (lua_State *L, Table *t, int nasize, int nhsize) {
-  int i;
-  int oldasize = t->sizearray;
-  int oldhsize = t->lsizenode;
-  Node *nold = t->node;  /* save old hash ... */
-  if (nasize > oldasize)  /* array part must grow? */
-    setarrayvector(L, t, nasize);
-  /* create new hash part with appropriate size */
-  setnodevector(L, t, nhsize);  
-  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(L, luaH_setnum(L, t, i+1), &t->array[i]);
-    }
-    /* shrink array */
-    luaM_reallocvector(L, t->array, oldasize, nasize, TValue);
-  }
-  /* re-insert elements from hash part */
-  for (i = twoto(oldhsize) - 1; i >= 0; i--) {
-    Node *old = nold+i;
-    if (!ttisnil(gval(old)))
-      setobjt2t(L, luaH_set(L, t, key2tval(old)), gval(old));
-  }
-  if (nold != dummynode)
-    luaM_freearray(L, nold, twoto(oldhsize), Node);  /* free old array */
-}
-
-
-void luaH_resizearray (lua_State *L, Table *t, int nasize) {
-  int nsize = (t->node == dummynode) ? 0 : sizenode(t);
-  resize(L, t, nasize, nsize);
-}
-
-
-static void rehash (lua_State *L, Table *t, const TValue *ek) {
-  int nasize, na;
-  int nums[MAXBITS+1];  /* nums[i] = number of keys between 2^(i-1) and 2^i */
-  int i;
-  int totaluse;
-  for (i=0; i<=MAXBITS; i++) nums[i] = 0;  /* reset counts */
-  nasize = numusearray(t, nums);  /* count keys in array part */
-  totaluse = nasize;  /* all those keys are integer keys */
-  totaluse += numusehash(t, nums, &nasize);  /* count keys in hash part */
-  /* count extra key */
-  nasize += countint(ek, nums);
-  totaluse++;
-  /* compute new size for array part */
-  na = computesizes(nums, &nasize);
-  /* resize the table to new computed sizes */
-  resize(L, t, nasize, totaluse - na);
-}
-
-
-
-/*
-** }=============================================================
-*/
-
-
-Table *luaH_new (lua_State *L, int narray, int nhash) {
-  Table *t = luaM_new(L, Table);
-  luaC_link(L, obj2gco(t), LUA_TTABLE);
-  t->metatable = NULL;
-  t->flags = cast_byte(~0);
-  /* temporary values (kept only if some malloc fails) */
-  t->array = NULL;
-  t->sizearray = 0;
-  t->lsizenode = 0;
-  t->node = cast(Node *, dummynode);
-  setarrayvector(L, t, narray);
-  setnodevector(L, t, nhash);
-  return t;
-}
-
-
-void luaH_free (lua_State *L, Table *t) {
-  if (t->node != dummynode)
-    luaM_freearray(L, t->node, sizenode(t), Node);
-  luaM_freearray(L, t->array, t->sizearray, TValue);
-  luaM_free(L, t);
-}
-
-
-static Node *getfreepos (Table *t) {
-  while (t->lastfree-- > t->node) {
-    if (ttisnil(gkey(t->lastfree)))
-      return t->lastfree;
-  }
-  return NULL;  /* could not find a free place */
-}
-
-
-
-/*
-** 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 TValue *newkey (lua_State *L, Table *t, const TValue *key) {
-  Node *mp = mainposition(t, key);
-  if (!ttisnil(gval(mp)) || mp == dummynode) {
-    Node *othern;
-    Node *n = getfreepos(t);  /* get a free place */
-    if (n == NULL) {  /* cannot find a free place? */
-      rehash(L, t, key);  /* grow table */
-      return luaH_set(L, t, key);  /* re-insert key into grown table */
-    }
-    lua_assert(n != dummynode);
-    othern = mainposition(t, key2tval(mp));
-    if (othern != mp) {  /* is colliding node out of its main position? */
-      /* yes; move colliding node into free position */
-      while (gnext(othern) != mp) othern = gnext(othern);  /* find previous */
-      gnext(othern) = n;  /* redo the chain with `n' in place of `mp' */
-      *n = *mp;  /* copy colliding node into free pos. (mp->next also goes) */
-      gnext(mp) = NULL;  /* now `mp' is free */
-      setnilvalue(gval(mp));
-    }
-    else {  /* colliding node is in its own main position */
-      /* new node will go into free position */
-      gnext(n) = gnext(mp);  /* chain new position */
-      gnext(mp) = n;
-      mp = n;
-    }
-  }
-  gkey(mp)->value = key->value; gkey(mp)->tt = key->tt;
-  luaC_barriert(L, t, key);
-  lua_assert(ttisnil(gval(mp)));
-  return gval(mp);
-}
-
-
-/*
-** search function for integers
-*/
-const TValue *luaH_getnum (Table *t, int key) {
-  /* (1 <= key && key <= t->sizearray) */
-  if (cast(unsigned int, key-1) < cast(unsigned int, t->sizearray))
-    return &t->array[key-1];
-  else {
-    lua_Number nk = cast_num(key);
-    Node *n = hashnum(t, nk);
-    do {  /* check whether `key' is somewhere in the chain */
-      if (ttisnumber(gkey(n)) && luai_numeq(nvalue(gkey(n)), nk))
-        return gval(n);  /* that's it */
-      else n = gnext(n);
-    } while (n);
-    return luaO_nilobject;
-  }
-}
-
-
-/*
-** search function for strings
-*/
-const TValue *luaH_getstr (Table *t, TString *key) {
-  Node *n = hashstr(t, key);
-  do {  /* check whether `key' is somewhere in the chain */
-    if (ttisstring(gkey(n)) && rawtsvalue(gkey(n)) == key)
-      return gval(n);  /* that's it */
-    else n = gnext(n);
-  } while (n);
-  return luaO_nilobject;
-}
-
-
-/*
-** main search function
-*/
-const TValue *luaH_get (Table *t, const TValue *key) {
-  switch (ttype(key)) {
-    case LUA_TNIL: return luaO_nilobject;
-    case LUA_TSTRING: return luaH_getstr(t, rawtsvalue(key));
-    case LUA_TNUMBER: {
-      int k;
-      lua_Number n = nvalue(key);
-      lua_number2int(k, n);
-      if (luai_numeq(cast_num(k), nvalue(key))) /* index is int? */
-        return luaH_getnum(t, k);  /* use specialized version */
-      /* else go through */
-    }
-    default: {
-      Node *n = mainposition(t, key);
-      do {  /* check whether `key' is somewhere in the chain */
-        if (luaO_rawequalObj(key2tval(n), key))
-          return gval(n);  /* that's it */
-        else n = gnext(n);
-      } while (n);
-      return luaO_nilobject;
-    }
-  }
-}
-
-
-TValue *luaH_set (lua_State *L, Table *t, const TValue *key) {
-  const TValue *p = luaH_get(t, key);
-  t->flags = 0;
-  if (p != luaO_nilobject)
-    return cast(TValue *, p);
-  else {
-    if (ttisnil(key)) luaG_runerror(L, "table index is nil");
-    else if (ttisnumber(key) && luai_numisnan(nvalue(key)))
-      luaG_runerror(L, "table index is NaN");
-    return newkey(L, t, key);
-  }
-}
-
-
-TValue *luaH_setnum (lua_State *L, Table *t, int key) {
-  const TValue *p = luaH_getnum(t, key);
-  if (p != luaO_nilobject)
-    return cast(TValue *, p);
-  else {
-    TValue k;
-    setnvalue(&k, cast_num(key));
-    return newkey(L, t, &k);
-  }
-}
-
-
-TValue *luaH_setstr (lua_State *L, Table *t, TString *key) {
-  const TValue *p = luaH_getstr(t, key);
-  if (p != luaO_nilobject)
-    return cast(TValue *, p);
-  else {
-    TValue k;
-    setsvalue(L, &k, key);
-    return newkey(L, t, &k);
-  }
-}
-
-
-static int unbound_search (Table *t, unsigned int j) {
-  unsigned int i = j;  /* i is zero or a present index */
-  j++;
-  /* find `i' and `j' such that i is present and j is not */
-  while (!ttisnil(luaH_getnum(t, j))) {
-    i = j;
-    j *= 2;
-    if (j > cast(unsigned int, MAX_INT)) {  /* overflow? */
-      /* table was built with bad purposes: resort to linear search */
-      i = 1;
-      while (!ttisnil(luaH_getnum(t, i))) i++;
-      return i - 1;
-    }
-  }
-  /* now do a binary search between them */
-  while (j - i > 1) {
-    unsigned int m = (i+j)/2;
-    if (ttisnil(luaH_getnum(t, m))) j = m;
-    else i = m;
-  }
-  return i;
-}
-
-
-/*
-** Try to find a boundary in table `t'. A `boundary' is an integer index
-** such that t[i] is non-nil and t[i+1] is nil (and 0 if t[1] is nil).
-*/
-int luaH_getn (Table *t) {
-  unsigned int j = t->sizearray;
-  if (j > 0 && ttisnil(&t->array[j - 1])) {
-    /* there is a boundary in the array part: (binary) search for it */
-    unsigned int i = 0;
-    while (j - i > 1) {
-      unsigned int m = (i+j)/2;
-      if (ttisnil(&t->array[m - 1])) j = m;
-      else i = m;
-    }
-    return i;
-  }
-  /* else must find a boundary in hash part */
-  else if (t->node == dummynode)  /* hash part is empty? */
-    return j;  /* that is easy... */
-  else return unbound_search(t, j);
-}
-
-
-
-#if defined(LUA_DEBUG)
-
-Node *luaH_mainposition (const Table *t, const TValue *key) {
-  return mainposition(t, key);
-}
-
-int luaH_isdummy (Node *n) { return n == dummynode; }
-
-#endif