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touched up hash macros and functions

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hyunghwan.chung 2019-03-06 01:58:51 +00:00
parent ec5f881951
commit e93da317e3
9 changed files with 267 additions and 202 deletions
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10
moo/lib/dic.c
View File

@ -77,7 +77,7 @@ static moo_oop_oop_t expand_bucket (moo_t* moo, moo_oop_oop_t oldbuc)
key = (moo_oop_char_t)ass->key; key = (moo_oop_char_t)ass->key;
MOO_ASSERT (moo, MOO_CLASSOF(moo,key) == moo->_symbol); MOO_ASSERT (moo, MOO_CLASSOF(moo,key) == moo->_symbol);
index = moo_hashoochars(MOO_OBJ_GET_CHAR_SLOT(key), MOO_OBJ_GET_SIZE(key)) % newsz; index = moo_hash_oochars(MOO_OBJ_GET_CHAR_SLOT(key), MOO_OBJ_GET_SIZE(key)) % newsz;
while (MOO_OBJ_GET_OOP_VAL(newbuc, index) != moo->_nil) index = (index + 1) % newsz; while (MOO_OBJ_GET_OOP_VAL(newbuc, index) != moo->_nil) index = (index + 1) % newsz;
MOO_STORE_OOP (moo, MOO_OBJ_GET_OOP_PTR(newbuc, index), (moo_oop_t)ass); MOO_STORE_OOP (moo, MOO_OBJ_GET_OOP_PTR(newbuc, index), (moo_oop_t)ass);
@ -101,7 +101,7 @@ static moo_oop_association_t find_or_upsert (moo_t* moo, moo_oop_dic_t dic, moo_
MOO_ASSERT (moo, MOO_CLASSOF(moo,dic->tally) == moo->_small_integer); MOO_ASSERT (moo, MOO_CLASSOF(moo,dic->tally) == moo->_small_integer);
MOO_ASSERT (moo, MOO_CLASSOF(moo,dic->bucket) == moo->_array); MOO_ASSERT (moo, MOO_CLASSOF(moo,dic->bucket) == moo->_array);
hv = moo_hashoochars(MOO_OBJ_GET_CHAR_SLOT(key), MOO_OBJ_GET_SIZE(key)); hv = moo_hash_oochars(MOO_OBJ_GET_CHAR_SLOT(key), MOO_OBJ_GET_SIZE(key));
index = hv % MOO_OBJ_GET_SIZE(dic->bucket); index = hv % MOO_OBJ_GET_SIZE(dic->bucket);
/* find */ /* find */
@ -207,7 +207,7 @@ moo_oop_association_t moo_lookupdic_noseterr (moo_t* moo, moo_oop_dic_t dic, con
MOO_ASSERT (moo, MOO_CLASSOF(moo,dic->tally) == moo->_small_integer); MOO_ASSERT (moo, MOO_CLASSOF(moo,dic->tally) == moo->_small_integer);
MOO_ASSERT (moo, MOO_CLASSOF(moo,dic->bucket) == moo->_array); MOO_ASSERT (moo, MOO_CLASSOF(moo,dic->bucket) == moo->_array);
index = moo_hashoochars(name->ptr, name->len) % MOO_OBJ_GET_SIZE(dic->bucket); index = moo_hash_oochars(name->ptr, name->len) % MOO_OBJ_GET_SIZE(dic->bucket);
while ((moo_oop_t)(ass = (moo_oop_association_t)MOO_OBJ_GET_OOP_VAL(dic->bucket, index)) != moo->_nil) while ((moo_oop_t)(ass = (moo_oop_association_t)MOO_OBJ_GET_OOP_VAL(dic->bucket, index)) != moo->_nil)
{ {
@ -289,7 +289,7 @@ int moo_deletedic (moo_t* moo, moo_oop_dic_t dic, const moo_oocs_t* name)
tally = MOO_OOP_TO_SMOOI(dic->tally); tally = MOO_OOP_TO_SMOOI(dic->tally);
bs = MOO_OBJ_GET_SIZE(dic->bucket); bs = MOO_OBJ_GET_SIZE(dic->bucket);
hv = moo_hashoochars(name->ptr, name->len) % bs; hv = moo_hash_oochars(name->ptr, name->len) % bs;
index = hv % bs; index = hv % bs;
/* find */ /* find */
@ -322,7 +322,7 @@ found:
/* otherwise get the natural hash index for the data in the slot at /* otherwise get the natural hash index for the data in the slot at
* the current hash index */ * the current hash index */
z = moo_hashoochars(MOO_OBJ_GET_CHAR_SLOT(ass->key), MOO_OBJ_GET_SIZE(ass->key)) % bs; z = moo_hash_oochars(MOO_OBJ_GET_CHAR_SLOT(ass->key), MOO_OBJ_GET_SIZE(ass->key)) % bs;
/* move an element if necesary */ /* move an element if necesary */
if ((y > x && (z <= x || z > y)) || (y < x && (z <= x && z > y))) if ((y > x && (z <= x || z > y)) || (y < x && (z <= x && z > y)))

6
moo/lib/exec.c
View File

@ -2003,15 +2003,15 @@ static moo_pfrc_t pf_hash (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
break; break;
case MOO_OBJ_TYPE_CHAR: case MOO_OBJ_TYPE_CHAR:
hv = moo_hashoochars (MOO_OBJ_GET_CHAR_SLOT(rcv), MOO_OBJ_GET_SIZE(rcv)); hv = moo_hash_oochars (MOO_OBJ_GET_CHAR_SLOT(rcv), MOO_OBJ_GET_SIZE(rcv));
break; break;
case MOO_OBJ_TYPE_HALFWORD: case MOO_OBJ_TYPE_HALFWORD:
hv = moo_hashhalfwords(MOO_OBJ_GET_HALFWORD_SLOT(rcv), MOO_OBJ_GET_SIZE(rcv)); hv = moo_hash_halfwords(MOO_OBJ_GET_HALFWORD_SLOT(rcv), MOO_OBJ_GET_SIZE(rcv));
break; break;
case MOO_OBJ_TYPE_WORD: case MOO_OBJ_TYPE_WORD:
hv = moo_hashwords(MOO_OBJ_GET_WORD_SLOT(rcv), MOO_OBJ_GET_SIZE(rcv)); hv = moo_hash_words(MOO_OBJ_GET_WORD_SLOT(rcv), MOO_OBJ_GET_SIZE(rcv));
break; break;
default: default:

30
moo/lib/fmtoutv.h
View File

@ -461,7 +461,7 @@ static int fmtoutv (moo_t* moo, const fmtchar_t* fmt, moo_fmtout_data_t* data, v
lowercase_s: lowercase_s:
bsp = va_arg(ap, moo_bch_t*); bsp = va_arg(ap, moo_bch_t*);
if (bsp == MOO_NULL) bsp = bch_nullstr; if (!bsp) bsp = bch_nullstr;
#if defined(MOO_OOCH_IS_UCH) #if defined(MOO_OOCH_IS_UCH)
/* get the length */ /* get the length */
@ -537,7 +537,7 @@ static int fmtoutv (moo_t* moo, const fmtchar_t* fmt, moo_fmtout_data_t* data, v
#endif #endif
uppercase_s: uppercase_s:
usp = va_arg(ap, moo_uch_t*); usp = va_arg(ap, moo_uch_t*);
if (usp == MOO_NULL) usp = uch_nullstr; if (!usp) usp = uch_nullstr;
#if defined(MOO_OOCH_IS_BCH) #if defined(MOO_OOCH_IS_BCH)
/* get the length */ /* get the length */
@ -683,14 +683,14 @@ static int fmtoutv (moo_t* moo, const fmtchar_t* fmt, moo_fmtout_data_t* data, v
if (fltfmt->ptr == fltfmt->buf) if (fltfmt->ptr == fltfmt->buf)
{ {
fltfmt->ptr = MOO_MMGR_ALLOC(MOO_MMGR_GETDFL(), MOO_SIZEOF(*fltfmt->ptr) * (fmtlen + 1)); fltfmt->ptr = MOO_MMGR_ALLOC(MOO_MMGR_GETDFL(), MOO_SIZEOF(*fltfmt->ptr) * (fmtlen + 1));
if (fltfmt->ptr == MOO_NULL) goto oops; if (!fltfmt->ptr) goto oops;
} }
else else
{ {
moo_mchar_t* tmpptr; moo_bch_t* tmpptr;
tmpptr = MOO_MMGR_REALLOC(MOO_MMGR_GETDFL(), fltfmt->ptr, MOO_SIZEOF(*fltfmt->ptr) * (fmtlen + 1)); tmpptr = MOO_MMGR_REALLOC(MOO_MMGR_GETDFL(), fltfmt->ptr, MOO_SIZEOF(*fltfmt->ptr) * (fmtlen + 1));
if (tmpptr == MOO_NULL) goto oops; if (!tmpptr) goto oops;
fltfmt->ptr = tmpptr; fltfmt->ptr = tmpptr;
} }
@ -743,7 +743,7 @@ static int fmtoutv (moo_t* moo, const fmtchar_t* fmt, moo_fmtout_data_t* data, v
MOO_ASSERT (moo, fltout->ptr == fltout->buf); MOO_ASSERT (moo, fltout->ptr == fltout->buf);
fltout->ptr = MOO_MMGR_ALLOC(MOO_MMGR_GETDFL(), MOO_SIZEOF(char_t) * (newcapa + 1)); fltout->ptr = MOO_MMGR_ALLOC(MOO_MMGR_GETDFL(), MOO_SIZEOF(char_t) * (newcapa + 1));
if (fltout->ptr == MOO_NULL) goto oops; if (!fltout->ptr) goto oops;
fltout->capa = newcapa; fltout->capa = newcapa;
} }
#endif #endif
@ -754,23 +754,23 @@ static int fmtoutv (moo_t* moo, const fmtchar_t* fmt, moo_fmtout_data_t* data, v
if (dtype == LF_LD) if (dtype == LF_LD)
{ {
#if defined(HAVE_SNPRINTF) #if defined(HAVE_SNPRINTF)
q = snprintf ((moo_mchar_t*)fltout->ptr, fltout->capa + 1, fltfmt->ptr, v_ld); q = snprintf ((moo_bch_t*)fltout->ptr, fltout->capa + 1, fltfmt->ptr, v_ld);
#else #else
q = sprintf ((moo_mchar_t*)fltout->ptr, fltfmt->ptr, v_ld); q = sprintf ((moo_bch_t*)fltout->ptr, fltfmt->ptr, v_ld);
#endif #endif
} }
#if (MOO_SIZEOF___FLOAT128 > 0) && defined(HAVE_QUADMATH_SNPRINTF) #if (MOO_SIZEOF___FLOAT128 > 0) && defined(HAVE_QUADMATH_SNPRINTF)
else if (dtype == LF_QD) else if (dtype == LF_QD)
{ {
q = quadmath_snprintf ((moo_mchar_t*)fltout->ptr, fltout->capa + 1, fltfmt->ptr, v_qd); q = quadmath_snprintf((moo_bch_t*)fltout->ptr, fltout->capa + 1, fltfmt->ptr, v_qd);
} }
#endif #endif
else else
{ {
#if defined(HAVE_SNPRINTF) #if defined(HAVE_SNPRINTF)
q = snprintf ((moo_mchar_t*)fltout->ptr, fltout->capa + 1, fltfmt->ptr, v_d); q = snprintf ((moo_bch_t*)fltout->ptr, fltout->capa + 1, fltfmt->ptr, v_d);
#else #else
q = sprintf ((moo_mchar_t*)fltout->ptr, fltfmt->ptr, v_d); q = sprintf ((moo_bch_t*)fltout->ptr, fltfmt->ptr, v_d);
#endif #endif
} }
if (q <= -1) goto oops; if (q <= -1) goto oops;
@ -782,26 +782,26 @@ static int fmtoutv (moo_t* moo, const fmtchar_t* fmt, moo_fmtout_data_t* data, v
if (fltout->ptr == fltout->sbuf) if (fltout->ptr == fltout->sbuf)
{ {
fltout->ptr = MOO_MMGR_ALLOC(MOO_MMGR_GETDFL(), MOO_SIZEOF(char_t) * (newcapa + 1)); fltout->ptr = MOO_MMGR_ALLOC(MOO_MMGR_GETDFL(), MOO_SIZEOF(char_t) * (newcapa + 1));
if (fltout->ptr == MOO_NULL) goto oops; if (!fltout->ptr) goto oops;
} }
else else
{ {
char_t* tmpptr; char_t* tmpptr;
tmpptr = MOO_MMGR_REALLOC(MOO_MMGR_GETDFL(), fltout->ptr, MOO_SIZEOF(char_t) * (newcapa + 1)); tmpptr = MOO_MMGR_REALLOC(MOO_MMGR_GETDFL(), fltout->ptr, MOO_SIZEOF(char_t) * (newcapa + 1));
if (tmpptr == MOO_NULL) goto oops; if (!tmpptr) goto oops;
fltout->ptr = tmpptr; fltout->ptr = tmpptr;
} }
fltout->capa = newcapa; fltout->capa = newcapa;
} }
if (MOO_SIZEOF(char_t) != MOO_SIZEOF(moo_mchar_t)) if (MOO_SIZEOF(char_t) != MOO_SIZEOF(moo_bch_t))
{ {
fltout->ptr[q] = '\0'; fltout->ptr[q] = '\0';
while (q > 0) while (q > 0)
{ {
q--; q--;
fltout->ptr[q] = ((moo_mchar_t*)fltout->ptr)[q]; fltout->ptr[q] = ((moo_bch_t*)fltout->ptr)[q];
} }
} }

2
moo/lib/gc.c
View File

@ -682,7 +682,7 @@ static void compact_symbol_table (moo_t* moo, moo_oop_t _nil)
/* get the natural hash index for the data in the slot /* get the natural hash index for the data in the slot
* at the current hash index */ * at the current hash index */
MOO_ASSERT (moo, MOO_CLASSOF(moo,tmp) == moo->_symbol); MOO_ASSERT (moo, MOO_CLASSOF(moo,tmp) == moo->_symbol);
z = moo_hashoochars(MOO_OBJ_GET_CHAR_SLOT(tmp), MOO_OBJ_GET_SIZE(tmp)) % bucket_size; z = moo_hash_oochars(MOO_OBJ_GET_CHAR_SLOT(tmp), MOO_OBJ_GET_SIZE(tmp)) % bucket_size;
/* move an element if necessary */ /* move an element if necessary */
if ((y > x && (z <= x || z > y)) || (y < x && (z <= x && z > y))) if ((y > x && (z <= x || z > y)) || (y < x && (z <= x && z > y)))

102
moo/lib/moo-cmn.h
View File

@ -347,6 +347,108 @@ typedef struct moo_bcs_t moo_bcs_t;
/* the maximum number of bch charaters to represent a single uch character */ /* the maximum number of bch charaters to represent a single uch character */
#define MOO_BCSIZE_MAX 6 #define MOO_BCSIZE_MAX 6
/* =========================================================================
* BASIC OOP ENCODING
* ========================================================================= */
/* actual structure defined in moo.h */
typedef struct moo_obj_t moo_obj_t;
typedef struct moo_obj_t* moo_oop_t;
/*
* An object pointer(OOP) is an ordinary pointer value to an object.
* but some simple numeric values are also encoded into OOP using a simple
* bit-shifting and masking.
*
* A real OOP is stored without any bit-shifting while a non-pointer value encoded
* in an OOP is bit-shifted to the left by 2 and the 2 least-significant bits
* are set to 1 or 2.
*
* This scheme works because the object allocators aligns the object size to
* a multiple of sizeof(moo_oop_t). This way, the 2 least-significant bits
* of a real OOP are always 0s.
*
* With 2 bits, i can encode only 3 special types except object pointers.
* Since I need more than 3 special types, I extend the tag bits up to 4 bits
* to represent a special data type that doesn't require a range as wide
* as a small integer. A unicode character, for instance, only requires 21
* bits at most. An error doesn't need to be as diverse as a small integer.
*/
#define MOO_OOP_TAG_BITS_LO 2
#define MOO_OOP_TAG_BITS_HI 2
#define MOO_OOP_TAG_SMOOI 1 /* 01 */
#define MOO_OOP_TAG_SMPTR 2 /* 10 */
#define MOO_OOP_TAG_EXTENDED 3 /* 11 - internal use only */
#define MOO_OOP_TAG_CHAR 3 /* 0011 */
#define MOO_OOP_TAG_ERROR 7 /* 0111 */
#define MOO_OOP_TAG_RESERVED0 11 /* 1011 */
#define MOO_OOP_TAG_RESERVED1 15 /* 1111 */
#define MOO_OOP_GET_TAG_LO(oop) (((moo_oow_t)oop) & MOO_LBMASK(moo_oow_t, MOO_OOP_TAG_BITS_LO))
#define MOO_OOP_GET_TAG_LOHI(oop) (((moo_oow_t)oop) & MOO_LBMASK(moo_oow_t, MOO_OOP_TAG_BITS_LO + MOO_OOP_TAG_BITS_HI))
#define MOO_OOP_GET_TAG(oop) (MOO_OOP_GET_TAG_LO(oop) == MOO_OOP_TAG_EXTENDED? MOO_OOP_GET_TAG_LOHI(oop): MOO_OOP_GET_TAG_LO(oop))
#define MOO_OOP_IS_NUMERIC(oop) (MOO_OOP_GET_TAG_LO(oop) != 0)
#define MOO_OOP_IS_POINTER(oop) (MOO_OOP_GET_TAG_LO(oop) == 0)
#define MOO_OOP_IS_SMOOI(oop) (MOO_OOP_GET_TAG_LO(oop) == MOO_OOP_TAG_SMOOI)
#define MOO_OOP_IS_SMPTR(oop) (MOO_OOP_GET_TAG_LO(oop) == MOO_OOP_TAG_SMPTR)
#define MOO_SMOOI_TO_OOP(num) ((moo_oop_t)((((moo_oow_t)(moo_ooi_t)(num)) << MOO_OOP_TAG_BITS_LO) | MOO_OOP_TAG_SMOOI))
#define MOO_OOP_TO_SMOOI(oop) (((moo_ooi_t)oop) >> MOO_OOP_TAG_BITS_LO)
/*
#define MOO_SMPTR_TO_OOP(ptr) ((moo_oop_t)((((moo_oow_t)(ptr)) << MOO_OOP_TAG_BITS_LO) | MOO_OOP_TAG_SMPTR))
#define MOO_OOP_TO_SMPTR(oop) (((moo_ooi_t)oop) >> MOO_OOP_TAG_BITS_LO)
*/
#define MOO_SMPTR_TO_OOP(ptr) ((moo_oop_t)(((moo_oow_t)ptr) | MOO_OOP_TAG_SMPTR))
#define MOO_OOP_TO_SMPTR(oop) ((void*)(((moo_oow_t)oop) & ~MOO_LBMASK(moo_oow_t, MOO_OOP_TAG_BITS_LO)))
#define MOO_OOP_IS_CHAR(oop) (MOO_OOP_GET_TAG(oop) == MOO_OOP_TAG_CHAR)
#define MOO_OOP_IS_ERROR(oop) (MOO_OOP_GET_TAG(oop) == MOO_OOP_TAG_ERROR)
#define MOO_OOP_TO_CHAR(oop) (((moo_oow_t)oop) >> (MOO_OOP_TAG_BITS_LO + MOO_OOP_TAG_BITS_LO))
#define MOO_CHAR_TO_OOP(num) ((moo_oop_t)((((moo_oow_t)(num)) << (MOO_OOP_TAG_BITS_LO + MOO_OOP_TAG_BITS_LO)) | MOO_OOP_TAG_CHAR))
#define MOO_OOP_TO_ERROR(oop) (((moo_oow_t)oop) >> (MOO_OOP_TAG_BITS_LO + MOO_OOP_TAG_BITS_LO))
#define MOO_ERROR_TO_OOP(num) ((moo_oop_t)((((moo_oow_t)(num)) << (MOO_OOP_TAG_BITS_LO + MOO_OOP_TAG_BITS_LO)) | MOO_OOP_TAG_ERROR))
/* -------------------------------- */
/* SMOOI takes up 62 bits on a 64-bit architecture and 30 bits
* on a 32-bit architecture. The absolute value takes up 61 bits and 29 bits
* respectively for the sign bit. */
#define MOO_SMOOI_BITS (MOO_OOI_BITS - MOO_OOP_TAG_BITS_LO)
#define MOO_SMOOI_ABS_BITS (MOO_SMOOI_BITS - 1)
#define MOO_SMOOI_MAX ((moo_ooi_t)(~((moo_oow_t)0) >> (MOO_OOP_TAG_BITS_LO + 1)))
/* Sacrificing 1 bit pattern for a negative SMOOI makes
* implementation a lot eaisier in many aspects. */
/*#define MOO_SMOOI_MIN (-MOO_SMOOI_MAX - 1)*/
#define MOO_SMOOI_MIN (-MOO_SMOOI_MAX)
#define MOO_IN_SMOOI_RANGE(ooi) ((ooi) >= MOO_SMOOI_MIN && (ooi) <= MOO_SMOOI_MAX)
/* SMPTR is a special value which has been devised to encode an address value
* whose low MOO_OOP_TAG_BITS_LO bits are 0. its class is SmallPointer. A pointer
* returned by most of system functions would be aligned to the pointer size.
* you can use the followings macros when converting such a pointer without loss. */
#define MOO_IN_SMPTR_RANGE(ptr) ((((moo_oow_t)ptr) & MOO_LBMASK(moo_oow_t, MOO_OOP_TAG_BITS_LO)) == 0)
#define MOO_CHAR_BITS (MOO_OOI_BITS - MOO_OOP_TAG_BITS_LO - MOO_OOP_TAG_BITS_HI)
#define MOO_CHAR_MIN 0
#define MOO_CHAR_MAX (~((moo_oow_t)0) >> (MOO_OOP_TAG_BITS_LO + MOO_OOP_TAG_BITS_HI))
#define MOO_ERROR_BITS (MOO_OOI_BITS - MOO_OOP_TAG_BITS_LO - MOO_OOP_TAG_BITS_HI)
#define MOO_ERROR_MIN 0
#define MOO_ERROR_MAX (~((moo_oow_t)0) >> (MOO_OOP_TAG_BITS_LO + MOO_OOP_TAG_BITS_HI))
/* TODO: There are untested code where a small integer is converted to moo_oow_t.
* for example, the spec making macro treats the number as moo_oow_t instead of moo_ooi_t.
* as of this writing, i skip testing that part with the spec value exceeding MOO_SMOOI_MAX.
* later, please verify it works, probably by limiting the value ranges in such macros
*/
/* ========================================================================= /* =========================================================================
* TIME-RELATED TYPES * TIME-RELATED TYPES
* =========================================================================*/ * =========================================================================*/

118
moo/lib/moo-utl.h
View File

@ -29,10 +29,9 @@
#include "moo-cmn.h" #include "moo-cmn.h"
/* =========================================================================
/* ----------------------------------------------------------------------- * DOUBLY LINKED LIST
* DOUBLY LINKED LIST MACROS * ========================================================================= */
* ----------------------------------------------------------------------- */
#define MOO_APPEND_TO_LIST(list, node) do { \ #define MOO_APPEND_TO_LIST(list, node) do { \
(node)->next = MOO_NULL; \ (node)->next = MOO_NULL; \
(node)->prev = (list)->last; \ (node)->prev = (list)->last; \
@ -57,7 +56,6 @@
} while(0) } while(0)
#define MOO_APPEND_TO_OOP_LIST(moo, list, node_type, node, _link) do { \ #define MOO_APPEND_TO_OOP_LIST(moo, list, node_type, node, _link) do { \
(node)->_link.next = (node_type)(moo)->_nil; \ (node)->_link.next = (node_type)(moo)->_nil; \
(node)->_link.prev = (list)->last; \ (node)->_link.prev = (list)->last; \
@ -89,8 +87,9 @@
} while(0); } while(0);
*/ */
/* =========================================================================
* ENDIAN CHANGE
* ========================================================================= */
#define MOO_CONST_SWAP16(x) \ #define MOO_CONST_SWAP16(x) \
((qse_uint16_t)((((qse_uint16_t)(x) & (qse_uint16_t)0x00ffU) << 8) | \ ((qse_uint16_t)((((qse_uint16_t)(x) & (qse_uint16_t)0x00ffU) << 8) | \
(((qse_uint16_t)(x) & (qse_uint16_t)0xff00U) >> 8) )) (((qse_uint16_t)(x) & (qse_uint16_t)0xff00U) >> 8) ))
@ -116,46 +115,129 @@
#endif #endif
/* =========================================================================
* HASH
* ========================================================================= */
#if (MOO_SIZEOF_SIZE_T == 4)
# define MOO_HASH_FNV_MAGIC_INIT (0x811c9dc5)
# define MOO_HASH_FNV_MAGIC_PRIME (0x01000193)
#elif (MOO_SIZEOF_SIZE_T == 8)
# define MOO_HASH_FNV_MAGIC_INIT (0xCBF29CE484222325)
# define MOO_HASH_FNV_MAGIC_PRIME (0x100000001B3l)
#elif (MOO_SIZEOF_SIZE_T == 16)
# define MOO_HASH_FNV_MAGIC_INIT (0x6C62272E07BB014262B821756295C58D)
# define MOO_HASH_FNV_MAGIC_PRIME (0x1000000000000000000013B)
#endif
#if defined(MOO_HASH_FNV_MAGIC_INIT)
/* FNV-1 hash */
# define MOO_HASH_INIT MOO_HASH_FNV_MAGIC_INIT
# define MOO_HASH_VALUE(hv,v) (((hv) ^ (v)) * MOO_HASH_FNV_MAGIC_PRIME)
#else
/* SDBM hash */
# define MOO_HASH_INIT 0
# define MOO_HASH_VALUE(hv,v) (((hv) << 6) + ((hv) << 16) - (hv) + (v))
#endif
#define MOO_HASH_VPTL(hv, ptr, len, type) do { \
hv = MOO_HASH_INIT; \
MOO_HASH_MORE_VPTL (hv, ptr, len, type); \
} while(0)
#define MOO_HASH_MORE_VPTL(hv, ptr, len, type) do { \
type* __moo_hash_more_vptl_p = (type*)(ptr); \
type* __moo_hash_more_vptl_q = (type*)__moo_hash_more_vptl_p + (len); \
while (__moo_hash_more_vptl_p < __moo_hash_more_vptl_q) \
{ \
hv = MOO_HASH_VALUE(hv, *__moo_hash_more_vptl_p); \
__moo_hash_more_vptl_p++; \
} \
} while(0)
#define MOO_HASH_VPTR(hv, ptr, type) do { \
hv = MOO_HASH_INIT; \
MOO_HASH_MORE_VPTR (hv, ptr, type); \
} while(0)
#define MOO_HASH_MORE_VPTR(hv, ptr, type) do { \
type* __moo_hash_more_vptr_p = (type*)(ptr); \
while (*__moo_hash_more_vptr_p) \
{ \
hv = MOO_HASH_VALUE(hv, *__moo_hash_more_vptr_p); \
__moo_hash_more_vptr_p++; \
} \
} while(0)
#define MOO_HASH_BYTES(hv, ptr, len) MOO_HASH_VPTL(hv, ptr, len, const moo_uint8_t)
#define MOO_HASH_MORE_BYTES(hv, ptr, len) MOO_HASH_MORE_VPTL(hv, ptr, len, const moo_uint8_t)
#define MOO_HASH_BCHARS(hv, ptr, len) MOO_HASH_VPTL(hv, ptr, len, const moo_bch_t)
#define MOO_HASH_MORE_BCHARS(hv, ptr, len) MOO_HASH_MORE_VPTL(hv, ptr, len, const moo_bch_t)
#define MOO_HASH_UCHARS(hv, ptr, len) MOO_HASH_VPTL(hv, ptr, len, const moo_uch_t)
#define MOO_HASH_MORE_UCHARS(hv, ptr, len) MOO_HASH_MORE_VPTL(hv, ptr, len, const moo_uch_t)
#define MOO_HASH_BCSTR(hv, ptr) MOO_HASH_VPTR(hv, ptr, const moo_bch_t)
#define MOO_HASH_MORE_BCSTR(hv, ptr) MOO_HASH_MORE_VPTR(hv, ptr, const moo_bch_t)
#define MOO_HASH_UCSTR(hv, ptr) MOO_HASH_VPTR(hv, ptr, const moo_uch_t)
#define MOO_HASH_MORE_UCSTR(hv, ptr) MOO_HASH_MORE_VPTR(hv, ptr, const moo_uch_t)
#if defined(__cplusplus) #if defined(__cplusplus)
extern "C" { extern "C" {
#endif #endif
MOO_EXPORT moo_oow_t moo_hash_bytes ( MOO_EXPORT moo_oow_t moo_hash_bytes_ (
const moo_oob_t* ptr, const moo_oob_t* ptr,
moo_oow_t len moo_oow_t len
); );
#if defined(MOO_HAVE_INLINE) #if defined(MOO_HAVE_INLINE)
static MOO_INLINE moo_oow_t moo_hashbchars (const moo_bch_t* ptr, moo_oow_t len) static MOO_INLINE moo_oow_t moo_hash_bytes (const moo_oob_t* ptr, moo_oow_t len)
{
moo_oow_t hv;
MOO_HASH_BYTES (hv, ptr, len);
/* constrain the hash value to be representable in a small integer
* for convenience sake */
return hv % ((moo_oow_t)MOO_SMOOI_MAX + 1);
}
static MOO_INLINE moo_oow_t moo_hash_bchars (const moo_bch_t* ptr, moo_oow_t len)
{ {
return moo_hash_bytes((const moo_oob_t*)ptr, len * MOO_SIZEOF(moo_bch_t)); return moo_hash_bytes((const moo_oob_t*)ptr, len * MOO_SIZEOF(moo_bch_t));
} }
static MOO_INLINE moo_oow_t moo_hashuchars (const moo_uch_t* ptr, moo_oow_t len) static MOO_INLINE moo_oow_t moo_hash_uchars (const moo_uch_t* ptr, moo_oow_t len)
{ {
return moo_hash_bytes((const moo_oob_t*)ptr, len * MOO_SIZEOF(moo_uch_t)); return moo_hash_bytes((const moo_oob_t*)ptr, len * MOO_SIZEOF(moo_uch_t));
} }
static MOO_INLINE moo_oow_t moo_hashwords (const moo_oow_t* ptr, moo_oow_t len) static MOO_INLINE moo_oow_t moo_hash_words (const moo_oow_t* ptr, moo_oow_t len)
{ {
return moo_hash_bytes((const moo_oob_t*)ptr, len * MOO_SIZEOF(moo_oow_t)); return moo_hash_bytes((const moo_oob_t*)ptr, len * MOO_SIZEOF(moo_oow_t));
} }
static MOO_INLINE moo_oow_t moo_hashhalfwords (const moo_oohw_t* ptr, moo_oow_t len) static MOO_INLINE moo_oow_t moo_hash_halfwords (const moo_oohw_t* ptr, moo_oow_t len)
{ {
return moo_hash_bytes((const moo_oob_t*)ptr, len * MOO_SIZEOF(moo_oohw_t)); return moo_hash_bytes((const moo_oob_t*)ptr, len * MOO_SIZEOF(moo_oohw_t));
} }
#else #else
# define moo_hashbchars(ptr,len) moo_hash_bytes((const moo_oob_t*)ptr, len * MOO_SIZEOF(moo_bch_t)) # define moo_hash_bytes(ptr,len) moo_hash_bytes_(ptr, len)
# define moo_hashuchars(ptr,len) moo_hash_bytes((const moo_oob_t*)ptr, len * MOO_SIZEOF(moo_uch_t)) # define moo_hash_bchars(ptr,len) moo_hash_bytes((const moo_oob_t*)(ptr), (len) * MOO_SIZEOF(moo_bch_t))
# define moo_hashwords(ptr,len) moo_hash_bytes((const moo_oob_t*)ptr, len * MOO_SIZEOF(moo_oow_t)) # define moo_hash_uchars(ptr,len) moo_hash_bytes((const moo_oob_t*)(ptr), (len) * MOO_SIZEOF(moo_uch_t))
# define moo_hashhalfwords(ptr,len) moo_hash_bytes((const moo_oob_t*)ptr, len * MOO_SIZEOF(moo_oohw_t)) # define moo_hash_words(ptr,len) moo_hash_bytes((const moo_oob_t*)(ptr), (len) * MOO_SIZEOF(moo_oow_t))
# define moo_hash_halfwords(ptr,len) moo_hash_bytes((const moo_oob_t*)(ptr), (len) * MOO_SIZEOF(moo_oohw_t))
#endif #endif
#if defined(MOO_OOCH_IS_UCH) #if defined(MOO_OOCH_IS_UCH)
# define moo_hashoochars(ptr,len) moo_hashuchars(ptr,len) # define moo_hash_oochars(ptr,len) moo_hash_uchars(ptr,len)
#else #else
# define moo_hashoochars(ptr,len) moo_hashbchars(ptr,len) # define moo_hash_oochars(ptr,len) moo_hash_bchars(ptr,len)
#endif #endif
/** /**

122
moo/lib/moo.h
View File

@ -131,8 +131,13 @@ enum moo_trait_t
}; };
typedef enum moo_trait_t moo_trait_t; typedef enum moo_trait_t moo_trait_t;
typedef struct moo_obj_t moo_obj_t;
typedef struct moo_obj_t* moo_oop_t; /* =========================================================================
* SPECIALIZED OOP TYPES
* ========================================================================= */
/* moo_oop_t defined in moo-cmn.h
* moo_obj_t defined further down */
/* these are more specialized types for moo_obj_t */ /* these are more specialized types for moo_obj_t */
typedef struct moo_obj_oop_t moo_obj_oop_t; typedef struct moo_obj_oop_t moo_obj_oop_t;
@ -154,9 +159,9 @@ typedef struct moo_obj_word_t* moo_oop_word_t;
#define MOO_OOHW_BITS (MOO_SIZEOF_OOHW_T * 8) #define MOO_OOHW_BITS (MOO_SIZEOF_OOHW_T * 8)
/* ========================================================================= */ /* =========================================================================
/* BIGINT TYPES AND MACROS */ * BIGINT TYPES AND MACROS
/* ========================================================================= */ * ========================================================================= */
#if (MOO_SIZEOF_UINTMAX_T > MOO_SIZEOF_OOW_T) #if (MOO_SIZEOF_UINTMAX_T > MOO_SIZEOF_OOW_T)
# define MOO_USE_FULL_WORD # define MOO_USE_FULL_WORD
#endif #endif
@ -197,102 +202,9 @@ enum moo_method_type_t
}; };
typedef enum moo_method_type_t moo_method_type_t; typedef enum moo_method_type_t moo_method_type_t;
/* /* =========================================================================
* OOP encoding * OBJECT STRUCTURE
* An object pointer(OOP) is an ordinary pointer value to an object. * ========================================================================= */
* but some simple numeric values are also encoded into OOP using a simple
* bit-shifting and masking.
*
* A real OOP is stored without any bit-shifting while a non-pointer value encoded
* in an OOP is bit-shifted to the left by 2 and the 2 least-significant bits
* are set to 1 or 2.
*
* This scheme works because the object allocators aligns the object size to
* a multiple of sizeof(moo_oop_t). This way, the 2 least-significant bits
* of a real OOP are always 0s.
*
* With 2 bits, i can encode only 3 special types except object pointers.
* Since I need more than 3 special types, I extend the tag bits up to 4 bits
* to represent a special data type that doesn't require a range as wide
* as a small integer. A unicode character, for instance, only requires 21
* bits at most. An error doesn't need to be as diverse as a small integer.
*/
#define MOO_OOP_TAG_BITS_LO 2
#define MOO_OOP_TAG_BITS_HI 2
#define MOO_OOP_TAG_SMOOI 1 /* 01 */
#define MOO_OOP_TAG_SMPTR 2 /* 10 */
#define MOO_OOP_TAG_EXTENDED 3 /* 11 - internal use only */
#define MOO_OOP_TAG_CHAR 3 /* 0011 */
#define MOO_OOP_TAG_ERROR 7 /* 0111 */
#define MOO_OOP_TAG_RESERVED0 11 /* 1011 */
#define MOO_OOP_TAG_RESERVED1 15 /* 1111 */
#define MOO_OOP_GET_TAG_LO(oop) (((moo_oow_t)oop) & MOO_LBMASK(moo_oow_t, MOO_OOP_TAG_BITS_LO))
#define MOO_OOP_GET_TAG_LOHI(oop) (((moo_oow_t)oop) & MOO_LBMASK(moo_oow_t, MOO_OOP_TAG_BITS_LO + MOO_OOP_TAG_BITS_HI))
#define MOO_OOP_GET_TAG(oop) (MOO_OOP_GET_TAG_LO(oop) == MOO_OOP_TAG_EXTENDED? MOO_OOP_GET_TAG_LOHI(oop): MOO_OOP_GET_TAG_LO(oop))
#define MOO_OOP_IS_NUMERIC(oop) (MOO_OOP_GET_TAG_LO(oop) != 0)
#define MOO_OOP_IS_POINTER(oop) (MOO_OOP_GET_TAG_LO(oop) == 0)
#define MOO_OOP_IS_SMOOI(oop) (MOO_OOP_GET_TAG_LO(oop) == MOO_OOP_TAG_SMOOI)
#define MOO_OOP_IS_SMPTR(oop) (MOO_OOP_GET_TAG_LO(oop) == MOO_OOP_TAG_SMPTR)
#define MOO_SMOOI_TO_OOP(num) ((moo_oop_t)((((moo_oow_t)(moo_ooi_t)(num)) << MOO_OOP_TAG_BITS_LO) | MOO_OOP_TAG_SMOOI))
#define MOO_OOP_TO_SMOOI(oop) (((moo_ooi_t)oop) >> MOO_OOP_TAG_BITS_LO)
/*
#define MOO_SMPTR_TO_OOP(ptr) ((moo_oop_t)((((moo_oow_t)(ptr)) << MOO_OOP_TAG_BITS_LO) | MOO_OOP_TAG_SMPTR))
#define MOO_OOP_TO_SMPTR(oop) (((moo_ooi_t)oop) >> MOO_OOP_TAG_BITS_LO)
*/
#define MOO_SMPTR_TO_OOP(ptr) ((moo_oop_t)(((moo_oow_t)ptr) | MOO_OOP_TAG_SMPTR))
#define MOO_OOP_TO_SMPTR(oop) ((void*)(((moo_oow_t)oop) & ~MOO_LBMASK(moo_oow_t, MOO_OOP_TAG_BITS_LO)))
#define MOO_OOP_IS_CHAR(oop) (MOO_OOP_GET_TAG(oop) == MOO_OOP_TAG_CHAR)
#define MOO_OOP_IS_ERROR(oop) (MOO_OOP_GET_TAG(oop) == MOO_OOP_TAG_ERROR)
#define MOO_OOP_TO_CHAR(oop) (((moo_oow_t)oop) >> (MOO_OOP_TAG_BITS_LO + MOO_OOP_TAG_BITS_LO))
#define MOO_CHAR_TO_OOP(num) ((moo_oop_t)((((moo_oow_t)(num)) << (MOO_OOP_TAG_BITS_LO + MOO_OOP_TAG_BITS_LO)) | MOO_OOP_TAG_CHAR))
#define MOO_OOP_TO_ERROR(oop) (((moo_oow_t)oop) >> (MOO_OOP_TAG_BITS_LO + MOO_OOP_TAG_BITS_LO))
#define MOO_ERROR_TO_OOP(num) ((moo_oop_t)((((moo_oow_t)(num)) << (MOO_OOP_TAG_BITS_LO + MOO_OOP_TAG_BITS_LO)) | MOO_OOP_TAG_ERROR))
/* -------------------------------- */
/* SMOOI takes up 62 bits on a 64-bit architecture and 30 bits
* on a 32-bit architecture. The absolute value takes up 61 bits and 29 bits
* respectively for the sign bit. */
#define MOO_SMOOI_BITS (MOO_OOI_BITS - MOO_OOP_TAG_BITS_LO)
#define MOO_SMOOI_ABS_BITS (MOO_SMOOI_BITS - 1)
#define MOO_SMOOI_MAX ((moo_ooi_t)(~((moo_oow_t)0) >> (MOO_OOP_TAG_BITS_LO + 1)))
/* Sacrificing 1 bit pattern for a negative SMOOI makes
* implementation a lot eaisier in many aspects. */
/*#define MOO_SMOOI_MIN (-MOO_SMOOI_MAX - 1)*/
#define MOO_SMOOI_MIN (-MOO_SMOOI_MAX)
#define MOO_IN_SMOOI_RANGE(ooi) ((ooi) >= MOO_SMOOI_MIN && (ooi) <= MOO_SMOOI_MAX)
/* SMPTR is a special value which has been devised to encode an address value
* whose low MOO_OOP_TAG_BITS_LO bits are 0. its class is SmallPointer. A pointer
* returned by most of system functions would be aligned to the pointer size.
* you can use the followings macros when converting such a pointer without loss. */
#define MOO_IN_SMPTR_RANGE(ptr) ((((moo_oow_t)ptr) & MOO_LBMASK(moo_oow_t, MOO_OOP_TAG_BITS_LO)) == 0)
#define MOO_CHAR_BITS (MOO_OOI_BITS - MOO_OOP_TAG_BITS_LO - MOO_OOP_TAG_BITS_HI)
#define MOO_CHAR_MIN 0
#define MOO_CHAR_MAX (~((moo_oow_t)0) >> (MOO_OOP_TAG_BITS_LO + MOO_OOP_TAG_BITS_HI))
#define MOO_ERROR_BITS (MOO_OOI_BITS - MOO_OOP_TAG_BITS_LO - MOO_OOP_TAG_BITS_HI)
#define MOO_ERROR_MIN 0
#define MOO_ERROR_MAX (~((moo_oow_t)0) >> (MOO_OOP_TAG_BITS_LO + MOO_OOP_TAG_BITS_HI))
/* TODO: There are untested code where a small integer is converted to moo_oow_t.
* for example, the spec making macro treats the number as moo_oow_t instead of moo_ooi_t.
* as of this writing, i skip testing that part with the spec value exceeding MOO_SMOOI_MAX.
* later, please verify it works, probably by limiting the value ranges in such macros
*/
/*
* Object structure
*/
enum moo_obj_type_t enum moo_obj_type_t
{ {
MOO_OBJ_TYPE_OOP, MOO_OBJ_TYPE_OOP,
@ -1002,6 +914,11 @@ struct moo_fpdec_t
#define MOO_BYTESOF(moo,oop) \ #define MOO_BYTESOF(moo,oop) \
(MOO_OOP_IS_NUMERIC(oop)? MOO_SIZEOF(moo_oow_t): MOO_OBJ_BYTESOF(oop)) (MOO_OOP_IS_NUMERIC(oop)? MOO_SIZEOF(moo_oow_t): MOO_OBJ_BYTESOF(oop))
/* =========================================================================
* HEAP
* ========================================================================= */
typedef struct moo_space_t moo_space_t; typedef struct moo_space_t moo_space_t;
struct moo_space_t struct moo_space_t
@ -1023,9 +940,8 @@ struct moo_heap_t
moo_space_t newspace; moo_space_t newspace;
}; };
/* ========================================================================= /* =========================================================================
* MOO VM LOGGING * VM LOGGING
* ========================================================================= */ * ========================================================================= */
enum moo_log_mask_t enum moo_log_mask_t

6
moo/lib/sym.c
View File

@ -75,7 +75,7 @@ static moo_oop_oop_t expand_bucket (moo_t* moo, moo_oop_oop_t oldbuc)
MOO_ASSERT (moo, MOO_CLASSOF(moo,symbol) == moo->_symbol); MOO_ASSERT (moo, MOO_CLASSOF(moo,symbol) == moo->_symbol);
/*MOO_ASSERT (moo, sym->size > 0);*/ /*MOO_ASSERT (moo, sym->size > 0);*/
index = moo_hashoochars(MOO_OBJ_GET_CHAR_SLOT(symbol), MOO_OBJ_GET_SIZE(symbol)) % newsz; index = moo_hash_oochars(MOO_OBJ_GET_CHAR_SLOT(symbol), MOO_OBJ_GET_SIZE(symbol)) % newsz;
while (MOO_OBJ_GET_OOP_VAL(newbuc, index) != moo->_nil) index = (index + 1) % newsz; while (MOO_OBJ_GET_OOP_VAL(newbuc, index) != moo->_nil) index = (index + 1) % newsz;
MOO_STORE_OOP (moo, MOO_OBJ_GET_OOP_PTR(newbuc, index), (moo_oop_t)symbol); MOO_STORE_OOP (moo, MOO_OBJ_GET_OOP_PTR(newbuc, index), (moo_oop_t)symbol);
} }
@ -91,7 +91,7 @@ static moo_oop_t find_or_make_symbol (moo_t* moo, const moo_ooch_t* ptr, moo_oow
moo_oop_char_t symbol; moo_oop_char_t symbol;
MOO_ASSERT (moo, MOO_CLASSOF(moo,moo->symtab->bucket) == moo->_array); MOO_ASSERT (moo, MOO_CLASSOF(moo,moo->symtab->bucket) == moo->_array);
index = moo_hashoochars(ptr, len) % MOO_OBJ_GET_SIZE(moo->symtab->bucket); index = moo_hash_oochars(ptr, len) % MOO_OBJ_GET_SIZE(moo->symtab->bucket);
/* find a matching symbol in the open-addressed symbol table */ /* find a matching symbol in the open-addressed symbol table */
while ((moo_oop_t)(symbol = (moo_oop_char_t)MOO_OBJ_GET_OOP_VAL(moo->symtab->bucket, index)) != moo->_nil) while ((moo_oop_t)(symbol = (moo_oop_char_t)MOO_OBJ_GET_OOP_VAL(moo->symtab->bucket, index)) != moo->_nil)
@ -146,7 +146,7 @@ static moo_oop_t find_or_make_symbol (moo_t* moo, const moo_ooch_t* ptr, moo_oow
MOO_STORE_OOP (moo, (moo_oop_t*)&moo->symtab->bucket, (moo_oop_t)tmp); MOO_STORE_OOP (moo, (moo_oop_t*)&moo->symtab->bucket, (moo_oop_t)tmp);
/* recalculate the index for the expanded bucket */ /* recalculate the index for the expanded bucket */
index = moo_hashoochars(ptr, len) % MOO_OBJ_GET_SIZE(moo->symtab->bucket); index = moo_hash_oochars(ptr, len) % MOO_OBJ_GET_SIZE(moo->symtab->bucket);
while (MOO_OBJ_GET_OOP_VAL(moo->symtab->bucket, index) != moo->_nil) while (MOO_OBJ_GET_OOP_VAL(moo->symtab->bucket, index) != moo->_nil)
index = (index + 1) % MOO_OBJ_GET_SIZE(moo->symtab->bucket); index = (index + 1) % MOO_OBJ_GET_SIZE(moo->symtab->bucket);

55
moo/lib/utl.c
View File

@ -206,6 +206,16 @@ moo_uint128_t moo_hton128 (moo_uint128_t x)
/* ----------------------------------------------------------------------- */ /* ----------------------------------------------------------------------- */
moo_oow_t moo_hash_bytes_ (const moo_oob_t* ptr, moo_oow_t len)
{
moo_oow_t hv;
MOO_HASH_BYTES (hv, ptr, len);
/* constrain the hash value to be representable in a small integer
* for convenience sake */
return hv % ((moo_oow_t)MOO_SMOOI_MAX + 1);
}
/* ----------------------------------------------------------------------- */
/* some naming conventions /* some naming conventions
* bchars, uchars -> pointer and length * bchars, uchars -> pointer and length
@ -216,51 +226,6 @@ moo_uint128_t moo_hton128 (moo_uint128_t x)
* utobcstr -> ucstr to bcstr * utobcstr -> ucstr to bcstr
*/ */
#if MOO_SIZEOF_OOW_T == 4
# define FNV_MAGIC_INIT (0x811c9dc5)
# define FNV_MAGIC_PRIME (0x01000193)
#elif MOO_SIZEOF_OOW_T == 8
# define FNV_MAGIC_INIT (0xCBF29CE484222325)
# define FNV_MAGIC_PRIME (0x100000001B3)
#elif MOO_SIZEOF_OOW_T == 16
# define FNV_MAGIC_INIT (0x6C62272E07BB014262B821756295C58D)
# define FNV_MAGIC_PRIME (0x1000000000000000000013B)
#endif
moo_oow_t moo_hash_bytes (const moo_oob_t* ptr, moo_oow_t len)
{
moo_oow_t h;
const moo_uint8_t* bp, * be;
bp = ptr; be = bp + len;
/* this hash doesn't produce good distribution */
/*
h = 0
while (bp < be) h = h * 31 + *bp++;
*/
#if defined(FNV_MAGIC_INIT)
/* FNV-1 hash */
h = FNV_MAGIC_INIT;
while (bp < be)
{
h ^= (moo_oow_t)(*bp++);
h *= FNV_MAGIC_PRIME;
}
#else
/* SDBM hash is known to produce good overall distribution
* for many different data sets */
h = 0;
while (bp < be) h = (h << 6) + (h << 16) - h + *bp++;
#endif
/* constrain the hash value to be representable in a small integer
* for convenience sake */
return h % ((moo_oow_t)MOO_SMOOI_MAX + 1);
}
int moo_equal_uchars (const moo_uch_t* str1, const moo_uch_t* str2, moo_oow_t len) int moo_equal_uchars (const moo_uch_t* str1, const moo_uch_t* str2, moo_oow_t len)
{ {
moo_oow_t i; moo_oow_t i;