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Diffstat (limited to 'src/lib/lua/ltable.c')
-rw-r--r--src/lib/lua/ltable.c720
1 files changed, 360 insertions, 360 deletions
diff --git a/src/lib/lua/ltable.c b/src/lib/lua/ltable.c
index 420391fc745..dac9c074b65 100644
--- a/src/lib/lua/ltable.c
+++ b/src/lib/lua/ltable.c
@@ -40,37 +40,37 @@
** max size of array part is 2^MAXBITS
*/
#if LUAI_BITSINT >= 32
-#define MAXBITS 30
+#define MAXBITS 30
#else
-#define MAXBITS (LUAI_BITSINT-2)
+#define MAXBITS (LUAI_BITSINT-2)
#endif
-#define MAXASIZE (1 << MAXBITS)
+#define MAXASIZE (1 << MAXBITS)
-#define hashpow2(t,n) (gnode(t, lmod((n), sizenode(t))))
+#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)
+#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 hashmod(t,n) (gnode(t, ((n) % ((sizenode(t)-1)|1))))
-#define hashpointer(t,p) hashmod(t, IntPoint(p))
+#define hashpointer(t,p) hashmod(t, IntPoint(p))
-#define dummynode (&dummynode_)
+#define dummynode (&dummynode_)
-#define isdummy(n) ((n) == dummynode)
+#define isdummy(n) ((n) == dummynode)
static const Node dummynode_ = {
- {NILCONSTANT}, /* value */
- {{NILCONSTANT, NULL}} /* key */
+ {NILCONSTANT}, /* value */
+ {{NILCONSTANT, NULL}} /* key */
};
@@ -78,14 +78,14 @@ static const Node dummynode_ = {
** hash for lua_Numbers
*/
static Node *hashnum (const Table *t, lua_Number n) {
- int i;
- luai_hashnum(i, n);
- if (i < 0) {
- if (cast(unsigned int, i) == 0u - i) /* use unsigned to avoid overflows */
- i = 0; /* handle INT_MIN */
- i = -i; /* must be a positive value */
- }
- return hashmod(t, i);
+ int i;
+ luai_hashnum(i, n);
+ if (i < 0) {
+ if (cast(unsigned int, i) == 0u - i) /* use unsigned to avoid overflows */
+ i = 0; /* handle INT_MIN */
+ i = -i; /* must be a positive value */
+ }
+ return hashmod(t, i);
}
@@ -95,28 +95,28 @@ static Node *hashnum (const Table *t, lua_Number n) {
** 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_TLNGSTR: {
- TString *s = rawtsvalue(key);
- if (s->tsv.extra == 0) { /* no hash? */
- s->tsv.hash = luaS_hash(getstr(s), s->tsv.len, s->tsv.hash);
- s->tsv.extra = 1; /* now it has its hash */
- }
- return hashstr(t, rawtsvalue(key));
- }
- case LUA_TSHRSTR:
- return hashstr(t, rawtsvalue(key));
- case LUA_TBOOLEAN:
- return hashboolean(t, bvalue(key));
- case LUA_TLIGHTUSERDATA:
- return hashpointer(t, pvalue(key));
- case LUA_TLCF:
- return hashpointer(t, fvalue(key));
- default:
- return hashpointer(t, gcvalue(key));
- }
+ switch (ttype(key)) {
+ case LUA_TNUMBER:
+ return hashnum(t, nvalue(key));
+ case LUA_TLNGSTR: {
+ TString *s = rawtsvalue(key);
+ if (s->tsv.extra == 0) { /* no hash? */
+ s->tsv.hash = luaS_hash(getstr(s), s->tsv.len, s->tsv.hash);
+ s->tsv.extra = 1; /* now it has its hash */
+ }
+ return hashstr(t, rawtsvalue(key));
+ }
+ case LUA_TSHRSTR:
+ return hashstr(t, rawtsvalue(key));
+ case LUA_TBOOLEAN:
+ return hashboolean(t, bvalue(key));
+ case LUA_TLIGHTUSERDATA:
+ return hashpointer(t, pvalue(key));
+ case LUA_TLCF:
+ return hashpointer(t, fvalue(key));
+ default:
+ return hashpointer(t, gcvalue(key));
+ }
}
@@ -125,14 +125,14 @@ static Node *mainposition (const Table *t, const TValue *key) {
** 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 */
+ 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 */
}
@@ -142,47 +142,47 @@ static int arrayindex (const TValue *key) {
** beginning of a traversal is signaled 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);
- for (;;) { /* check whether `key' is somewhere in the chain */
- /* key may be dead already, but it is ok to use it in `next' */
- if (luaV_rawequalobj(gkey(n), key) ||
- (ttisdeadkey(gkey(n)) && iscollectable(key) &&
- deadvalue(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);
- if (n == NULL)
- luaG_runerror(L, "invalid key to " LUA_QL("next")); /* key not found */
- }
- }
+ 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);
+ for (;;) { /* check whether `key' is somewhere in the chain */
+ /* key may be dead already, but it is ok to use it in `next' */
+ if (luaV_rawequalobj(gkey(n), key) ||
+ (ttisdeadkey(gkey(n)) && iscollectable(key) &&
+ deadvalue(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);
+ if (n == NULL)
+ luaG_runerror(L, "invalid key to " LUA_QL("next")); /* key not found */
+ }
+ }
}
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, gkey(gnode(t, i)));
- setobj2s(L, key+1, gval(gnode(t, i)));
- return 1;
- }
- }
- return 0; /* no more elements */
+ 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, gkey(gnode(t, i)));
+ setobj2s(L, key+1, gval(gnode(t, i)));
+ return 1;
+ }
+ }
+ return 0; /* no more elements */
}
@@ -194,168 +194,168 @@ int luaH_next (lua_State *L, Table *t, StkId key) {
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;
+ 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[luaO_ceillog2(k)]++; /* count as such */
- return 1;
- }
- else
- return 0;
+ int k = arrayindex(key);
+ if (0 < k && k <= MAXASIZE) { /* is `key' an appropriate array index? */
+ nums[luaO_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;
+ 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(gkey(n), nums);
- totaluse++;
- }
- }
- *pnasize += ause;
- return totaluse;
+ 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(gkey(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;
+ 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 = luaO_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 */
+ int lsize;
+ if (size == 0) { /* no elements to hash part? */
+ t->node = cast(Node *, dummynode); /* use common `dummynode' */
+ lsize = 0;
+ }
+ else {
+ int i;
+ lsize = luaO_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 */
}
void luaH_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]))
- luaH_setint(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))) {
- /* doesn't need barrier/invalidate cache, as entry was
- already present in the table */
- setobjt2t(L, luaH_set(L, t, gkey(old)), gval(old));
- }
- }
- if (!isdummy(nold))
- luaM_freearray(L, nold, cast(size_t, twoto(oldhsize))); /* free old array */
+ 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]))
+ luaH_setint(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))) {
+ /* doesn't need barrier/invalidate cache, as entry was
+ already present in the table */
+ setobjt2t(L, luaH_set(L, t, gkey(old)), gval(old));
+ }
+ }
+ if (!isdummy(nold))
+ luaM_freearray(L, nold, cast(size_t, twoto(oldhsize))); /* free old array */
}
void luaH_resizearray (lua_State *L, Table *t, int nasize) {
- int nsize = isdummy(t->node) ? 0 : sizenode(t);
- luaH_resize(L, t, nasize, nsize);
+ int nsize = isdummy(t->node) ? 0 : sizenode(t);
+ luaH_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 with 2^(i-1) < k <= 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 */
- luaH_resize(L, t, nasize, totaluse - na);
+ int nasize, na;
+ int nums[MAXBITS+1]; /* nums[i] = number of keys with 2^(i-1) < k <= 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 */
+ luaH_resize(L, t, nasize, totaluse - na);
}
@@ -366,31 +366,31 @@ static void rehash (lua_State *L, Table *t, const TValue *ek) {
Table *luaH_new (lua_State *L) {
- Table *t = &luaC_newobj(L, LUA_TTABLE, sizeof(Table), NULL, 0)->h;
- t->metatable = NULL;
- t->flags = cast_byte(~0);
- t->array = NULL;
- t->sizearray = 0;
- setnodevector(L, t, 0);
- return t;
+ Table *t = &luaC_newobj(L, LUA_TTABLE, sizeof(Table), NULL, 0)->h;
+ t->metatable = NULL;
+ t->flags = cast_byte(~0);
+ t->array = NULL;
+ t->sizearray = 0;
+ setnodevector(L, t, 0);
+ return t;
}
void luaH_free (lua_State *L, Table *t) {
- if (!isdummy(t->node))
- luaM_freearray(L, t->node, cast(size_t, sizenode(t)));
- luaM_freearray(L, t->array, t->sizearray);
- luaM_free(L, t);
+ if (!isdummy(t->node))
+ luaM_freearray(L, t->node, cast(size_t, sizenode(t)));
+ luaM_freearray(L, t->array, t->sizearray);
+ luaM_free(L, t);
}
static Node *getfreepos (Table *t) {
- while (t->lastfree > t->node) {
- t->lastfree--;
- if (ttisnil(gkey(t->lastfree)))
- return t->lastfree;
- }
- return NULL; /* could not find a free place */
+ while (t->lastfree > t->node) {
+ t->lastfree--;
+ if (ttisnil(gkey(t->lastfree)))
+ return t->lastfree;
+ }
+ return NULL; /* could not find a free place */
}
@@ -403,40 +403,40 @@ static Node *getfreepos (Table *t) {
** position), new key goes to an empty position.
*/
TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key) {
- Node *mp;
- if (ttisnil(key)) luaG_runerror(L, "table index is nil");
- else if (ttisnumber(key) && luai_numisnan(L, nvalue(key)))
- luaG_runerror(L, "table index is NaN");
- mp = mainposition(t, key);
- if (!ttisnil(gval(mp)) || isdummy(mp)) { /* main position is taken? */
- Node *othern;
- Node *n = getfreepos(t); /* get a free place */
- if (n == NULL) { /* cannot find a free place? */
- rehash(L, t, key); /* grow table */
- /* whatever called 'newkey' take care of TM cache and GC barrier */
- return luaH_set(L, t, key); /* insert key into grown table */
- }
- lua_assert(!isdummy(n));
- othern = mainposition(t, gkey(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;
- }
- }
- setobj2t(L, gkey(mp), key);
- luaC_barrierback(L, obj2gco(t), key);
- lua_assert(ttisnil(gval(mp)));
- return gval(mp);
+ Node *mp;
+ if (ttisnil(key)) luaG_runerror(L, "table index is nil");
+ else if (ttisnumber(key) && luai_numisnan(L, nvalue(key)))
+ luaG_runerror(L, "table index is NaN");
+ mp = mainposition(t, key);
+ if (!ttisnil(gval(mp)) || isdummy(mp)) { /* main position is taken? */
+ Node *othern;
+ Node *n = getfreepos(t); /* get a free place */
+ if (n == NULL) { /* cannot find a free place? */
+ rehash(L, t, key); /* grow table */
+ /* whatever called 'newkey' take care of TM cache and GC barrier */
+ return luaH_set(L, t, key); /* insert key into grown table */
+ }
+ lua_assert(!isdummy(n));
+ othern = mainposition(t, gkey(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;
+ }
+ }
+ setobj2t(L, gkey(mp), key);
+ luaC_barrierback(L, obj2gco(t), key);
+ lua_assert(ttisnil(gval(mp)));
+ return gval(mp);
}
@@ -444,19 +444,19 @@ TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key) {
** search function for integers
*/
const TValue *luaH_getint (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;
- }
+ /* (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;
+ }
}
@@ -464,14 +464,14 @@ const TValue *luaH_getint (Table *t, int key) {
** search function for short strings
*/
const TValue *luaH_getstr (Table *t, TString *key) {
- Node *n = hashstr(t, key);
- lua_assert(key->tsv.tt == LUA_TSHRSTR);
- do { /* check whether `key' is somewhere in the chain */
- if (ttisshrstring(gkey(n)) && eqshrstr(rawtsvalue(gkey(n)), key))
- return gval(n); /* that's it */
- else n = gnext(n);
- } while (n);
- return luaO_nilobject;
+ Node *n = hashstr(t, key);
+ lua_assert(key->tsv.tt == LUA_TSHRSTR);
+ do { /* check whether `key' is somewhere in the chain */
+ if (ttisshrstring(gkey(n)) && eqshrstr(rawtsvalue(gkey(n)), key))
+ return gval(n); /* that's it */
+ else n = gnext(n);
+ } while (n);
+ return luaO_nilobject;
}
@@ -479,27 +479,27 @@ const TValue *luaH_getstr (Table *t, TString *key) {
** main search function
*/
const TValue *luaH_get (Table *t, const TValue *key) {
- switch (ttype(key)) {
- case LUA_TSHRSTR: return luaH_getstr(t, rawtsvalue(key));
- case LUA_TNIL: return luaO_nilobject;
- case LUA_TNUMBER: {
- int k;
- lua_Number n = nvalue(key);
- lua_number2int(k, n);
- if (luai_numeq(cast_num(k), n)) /* index is int? */
- return luaH_getint(t, k); /* use specialized version */
- /* else go through */
- }
- default: {
- Node *n = mainposition(t, key);
- do { /* check whether `key' is somewhere in the chain */
- if (luaV_rawequalobj(gkey(n), key))
- return gval(n); /* that's it */
- else n = gnext(n);
- } while (n);
- return luaO_nilobject;
- }
- }
+ switch (ttype(key)) {
+ case LUA_TSHRSTR: return luaH_getstr(t, rawtsvalue(key));
+ case LUA_TNIL: return luaO_nilobject;
+ case LUA_TNUMBER: {
+ int k;
+ lua_Number n = nvalue(key);
+ lua_number2int(k, n);
+ if (luai_numeq(cast_num(k), n)) /* index is int? */
+ return luaH_getint(t, k); /* use specialized version */
+ /* else go through */
+ }
+ default: {
+ Node *n = mainposition(t, key);
+ do { /* check whether `key' is somewhere in the chain */
+ if (luaV_rawequalobj(gkey(n), key))
+ return gval(n); /* that's it */
+ else n = gnext(n);
+ } while (n);
+ return luaO_nilobject;
+ }
+ }
}
@@ -508,48 +508,48 @@ const TValue *luaH_get (Table *t, const TValue *key) {
** barrier and invalidate the TM cache.
*/
TValue *luaH_set (lua_State *L, Table *t, const TValue *key) {
- const TValue *p = luaH_get(t, key);
- if (p != luaO_nilobject)
- return cast(TValue *, p);
- else return luaH_newkey(L, t, key);
+ const TValue *p = luaH_get(t, key);
+ if (p != luaO_nilobject)
+ return cast(TValue *, p);
+ else return luaH_newkey(L, t, key);
}
void luaH_setint (lua_State *L, Table *t, int key, TValue *value) {
- const TValue *p = luaH_getint(t, key);
- TValue *cell;
- if (p != luaO_nilobject)
- cell = cast(TValue *, p);
- else {
- TValue k;
- setnvalue(&k, cast_num(key));
- cell = luaH_newkey(L, t, &k);
- }
- setobj2t(L, cell, value);
+ const TValue *p = luaH_getint(t, key);
+ TValue *cell;
+ if (p != luaO_nilobject)
+ cell = cast(TValue *, p);
+ else {
+ TValue k;
+ setnvalue(&k, cast_num(key));
+ cell = luaH_newkey(L, t, &k);
+ }
+ setobj2t(L, cell, value);
}
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_getint(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_getint(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_getint(t, m))) j = m;
- else i = m;
- }
- return i;
+ 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_getint(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_getint(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_getint(t, m))) j = m;
+ else i = m;
+ }
+ return i;
}
@@ -558,21 +558,21 @@ static int unbound_search (Table *t, unsigned int j) {
** 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 (isdummy(t->node)) /* hash part is empty? */
- return j; /* that is easy... */
- else return unbound_search(t, j);
+ 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 (isdummy(t->node)) /* hash part is empty? */
+ return j; /* that is easy... */
+ else return unbound_search(t, j);
}
@@ -580,7 +580,7 @@ int luaH_getn (Table *t) {
#if defined(LUA_DEBUG)
Node *luaH_mainposition (const Table *t, const TValue *key) {
- return mainposition(t, key);
+ return mainposition(t, key);
}
int luaH_isdummy (Node *n) { return isdummy(n); }