*
*/
+/* These control hash traversal randomization and the environment variable PERL_PERTURB_KEYS.
+ * Currently disabling this functionality will break a few tests, but should otherwise work fine.
+ * See perlrun for more details. */
+
+#if defined(PERL_PERTURB_KEYS_DISABLED)
+# define PL_HASH_RAND_BITS_ENABLED 0
+# define PERL_HASH_ITER_BUCKET(iter) ((iter)->xhv_riter)
+#else
+# define PERL_HASH_RANDOMIZE_KEYS 1
+# if defined(PERL_PERTURB_KEYS_RANDOM)
+# define PL_HASH_RAND_BITS_ENABLED 1
+# elif defined(PERL_PERTURB_KEYS_DETERMINISTIC)
+# define PL_HASH_RAND_BITS_ENABLED 2
+# else
+# define USE_PERL_PERTURB_KEYS 1
+# define PL_HASH_RAND_BITS_ENABLED PL_hash_rand_bits_enabled
+# endif
+# define PERL_HASH_ITER_BUCKET(iter) (((iter)->xhv_riter) ^ ((iter)->xhv_rand))
+#endif
+
/* entry in hash value chain */
struct he {
/* Keep hent_next first in this structure, because sv_free_arenas take
I32 xhv_name_count;
struct mro_meta *xhv_mro_meta;
HV * xhv_super; /* SUPER method cache */
+#ifdef PERL_HASH_RANDOMIZE_KEYS
+ U32 xhv_rand; /* random value for hash traversal */
+ U32 xhv_last_rand; /* last random value for hash traversal,
+ used to detect each() after insert for warnings */
+#endif
+ U32 xhv_fill_lazy;
};
/* hash structure: */
STRLEN xhv_max; /* subscript of last element of xhv_array */
};
-/* hash a key */
-/* The use of a temporary pointer and the casting games
- * is needed to serve the dual purposes of
- * (a) the hashed data being interpreted as "unsigned char" (new since 5.8,
- * a "char" can be either signed or unsigned, depending on the compiler)
- * (b) catering for old code that uses a "char"
- *
- * The "hash seed" feature was added in Perl 5.8.1 to perturb the results
- * to avoid "algorithmic complexity attacks".
- *
- * If USE_HASH_SEED is defined, hash randomisation is done by default
- * If USE_HASH_SEED_EXPLICIT is defined, hash randomisation is done
- * only if the environment variable PERL_HASH_SEED is set.
- * (see also perl.c:perl_parse() and S_init_tls_and_interp() and util.c:get_hash_seed())
- */
-#ifndef PERL_HASH_SEED
-# if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
-# define PERL_HASH_SEED PL_hash_seed
-# else
-# define PERL_HASH_SEED "PeRlHaShhAcKpErl"
-# endif
-#endif
-
-#define PERL_HASH_SEED_U32 *((U32*)PERL_HASH_SEED)
-#define PERL_HASH_SEED_U64_1 (((U64*)PERL_HASH_SEED)[0])
-#define PERL_HASH_SEED_U64_2 (((U64*)PERL_HASH_SEED)[1])
-#define PERL_HASH_SEED_U16_x(idx) (((U16*)PERL_HASH_SEED)[idx])
-
-/* legacy - only mod_perl should be doing this. */
-#ifdef PERL_HASH_INTERNAL_ACCESS
-#define PERL_HASH_INTERNAL(hash,str,len) PERL_HASH(hash,str,len)
-#endif
-
-/* Uncomment one of the following lines to use an alternative hash algorithm.
-#define PERL_HASH_FUNC_SDBM
-#define PERL_HASH_FUNC_DJB2
-#define PERL_HASH_FUNC_SUPERFAST
-#define PERL_HASH_FUNC_MURMUR3
-#define PERL_HASH_FUNC_SIPHASH
-#define PERL_HASH_FUNC_ONE_AT_A_TIME
-#define PERL_HASH_FUNC_ONE_AT_A_TIME_OLD
-#define PERL_HASH_FUNC_BUZZHASH16
-*/
-
-#if !( 0 \
- || defined(PERL_HASH_FUNC_SDBM) \
- || defined(PERL_HASH_FUNC_DJB2) \
- || defined(PERL_HASH_FUNC_SUPERFAST) \
- || defined(PERL_HASH_FUNC_MURMUR3) \
- || defined(PERL_HASH_FUNC_ONE_AT_A_TIME) \
- || defined(PERL_HASH_FUNC_ONE_AT_A_TIME_OLD) \
- || defined(PERL_HASH_FUNC_BUZZHASH16) \
- )
-#define PERL_HASH_FUNC_MURMUR3
-#endif
-
-#if defined(PERL_HASH_FUNC_BUZZHASH16)
-/* "BUZZHASH16"
- *
- * I whacked this together while just playing around.
- *
- * The idea is that instead of hashing the actual string input we use the
- * bytes of the string as an index into a table of randomly generated
- * 16 bit values.
- *
- * A left rotate is used to "mix" in previous bits as we go, and I borrowed
- * the avalanche function from one-at-a-time for the final step. A lookup
- * into the table based on the lower 8 bits of the length combined with
- * the length itself is used as an itializer.
- *
- * The resulting hash value has no actual bits fed in from the string so
- * I would guess it is pretty secure, although I am not a cryptographer
- * and have no idea for sure. Nor has it been rigorously tested. On the
- * other hand it is reasonably fast, and seems to produce reasonable
- * distributions.
- *
- * Yves Orton
- */
-
-
-#define PERL_HASH_FUNC "BUZZHASH16"
-#define PERL_HASH_SEED_BYTES 512 /* 2 bytes per octet value, 2 * 256 */
-/* Find best way to ROTL32 */
-#if defined(_MSC_VER)
- #include <stdlib.h> /* Microsoft put _rotl declaration in here */
- #define BUZZHASH_ROTL32(x,r) _rotl(x,r)
-#else
- /* gcc recognises this code and generates a rotate instruction for CPUs with one */
- #define BUZZHASH_ROTL32(x,r) (((U32)x << r) | ((U32)x >> (32 - r)))
-#endif
-
-#define PERL_HASH(hash,str,len) \
- STMT_START { \
- const char * const s_PeRlHaSh_tmp = (str); \
- const unsigned char *s_PeRlHaSh = (const unsigned char *)s_PeRlHaSh_tmp; \
- const unsigned char *end_PeRlHaSh = (const unsigned char *)s_PeRlHaSh + len; \
- U32 hash_PeRlHaSh = (PERL_HASH_SEED_U16_x(len & 0xff) << 16) + len; \
- while (s_PeRlHaSh < end_PeRlHaSh) { \
- hash_PeRlHaSh ^= PERL_HASH_SEED_U16_x((U8)*s_PeRlHaSh++); \
- hash_PeRlHaSh += BUZZHASH_ROTL32(hash_PeRlHaSh,11); \
- } \
- hash_PeRlHaSh += (hash_PeRlHaSh << 3); \
- hash_PeRlHaSh ^= (hash_PeRlHaSh >> 11); \
- (hash) = (hash_PeRlHaSh + (hash_PeRlHaSh << 15)); \
- } STMT_END
-
-#elif defined(PERL_HASH_FUNC_SIPHASH)
-#define PERL_HASH_FUNC "SIPHASH"
-#define PERL_HASH_SEED_BYTES 16
-
-/* This is SipHash by Jean-Philippe Aumasson and Daniel J. Bernstein.
- * The authors claim it is relatively secure compared to the alternatives
- * and that performance wise it is a suitable hash for languages like Perl.
- * See:
- *
- * https://www.131002.net/siphash/
- *
- * This implementation seems to perform slightly slower than one-at-a-time for
- * short keys, but degrades slower for longer keys. Murmur Hash outperforms it
- * regardless of keys size.
- *
- * It is 64 bit only.
- */
-
-#define PERL_HASH_NEEDS_TWO_SEEDS
-
-#ifndef U64
-#define U64 uint64_t
-#endif
-
-#define ROTL(x,b) (U64)( ((x) << (b)) | ( (x) >> (64 - (b))) )
-
-#define U32TO8_LE(p, v) \
- (p)[0] = (U8)((v) ); (p)[1] = (U8)((v) >> 8); \
- (p)[2] = (U8)((v) >> 16); (p)[3] = (U8)((v) >> 24);
-
-#define U64TO8_LE(p, v) \
- U32TO8_LE((p), (U32)((v) )); \
- U32TO8_LE((p) + 4, (U32)((v) >> 32));
-
-#define U8TO64_LE(p) \
- (((U64)((p)[0]) ) | \
- ((U64)((p)[1]) << 8) | \
- ((U64)((p)[2]) << 16) | \
- ((U64)((p)[3]) << 24) | \
- ((U64)((p)[4]) << 32) | \
- ((U64)((p)[5]) << 40) | \
- ((U64)((p)[6]) << 48) | \
- ((U64)((p)[7]) << 56))
-
-#define SIPROUND \
- do { \
- v0_PeRlHaSh += v1_PeRlHaSh; v1_PeRlHaSh=ROTL(v1_PeRlHaSh,13); v1_PeRlHaSh ^= v0_PeRlHaSh; v0_PeRlHaSh=ROTL(v0_PeRlHaSh,32); \
- v2_PeRlHaSh += v3_PeRlHaSh; v3_PeRlHaSh=ROTL(v3_PeRlHaSh,16); v3_PeRlHaSh ^= v2_PeRlHaSh; \
- v0_PeRlHaSh += v3_PeRlHaSh; v3_PeRlHaSh=ROTL(v3_PeRlHaSh,21); v3_PeRlHaSh ^= v0_PeRlHaSh; \
- v2_PeRlHaSh += v1_PeRlHaSh; v1_PeRlHaSh=ROTL(v1_PeRlHaSh,17); v1_PeRlHaSh ^= v2_PeRlHaSh; v2_PeRlHaSh=ROTL(v2_PeRlHaSh,32); \
- } while(0)
-
-/* SipHash-2-4 */
-#define PERL_HASH(hash,str,len) STMT_START { \
- const char * const strtmp_PeRlHaSh = (str); \
- const unsigned char *in_PeRlHaSh = (const unsigned char *)strtmp_PeRlHaSh; \
- const U32 inlen_PeRlHaSh = (len); \
- /* "somepseudorandomlygeneratedbytes" */ \
- U64 v0_PeRlHaSh = 0x736f6d6570736575ULL; \
- U64 v1_PeRlHaSh = 0x646f72616e646f6dULL; \
- U64 v2_PeRlHaSh = 0x6c7967656e657261ULL; \
- U64 v3_PeRlHaSh = 0x7465646279746573ULL; \
-\
- U64 b_PeRlHaSh; \
- U64 k0_PeRlHaSh = PERL_HASH_SEED_U64_1; \
- U64 k1_PeRlHaSh = PERL_HASH_SEED_U64_2; \
- U64 m_PeRlHaSh; \
- const int left_PeRlHaSh = inlen_PeRlHaSh & 7; \
- const U8 *end_PeRlHaSh = in_PeRlHaSh + inlen_PeRlHaSh - left_PeRlHaSh; \
-\
- b_PeRlHaSh = ( ( U64 )(len) ) << 56; \
- v3_PeRlHaSh ^= k1_PeRlHaSh; \
- v2_PeRlHaSh ^= k0_PeRlHaSh; \
- v1_PeRlHaSh ^= k1_PeRlHaSh; \
- v0_PeRlHaSh ^= k0_PeRlHaSh; \
-\
- for ( ; in_PeRlHaSh != end_PeRlHaSh; in_PeRlHaSh += 8 ) \
- { \
- m_PeRlHaSh = U8TO64_LE( in_PeRlHaSh ); \
- v3_PeRlHaSh ^= m_PeRlHaSh; \
- SIPROUND; \
- SIPROUND; \
- v0_PeRlHaSh ^= m_PeRlHaSh; \
- } \
-\
- switch( left_PeRlHaSh ) \
- { \
- case 7: b_PeRlHaSh |= ( ( U64 )in_PeRlHaSh[ 6] ) << 48; \
- case 6: b_PeRlHaSh |= ( ( U64 )in_PeRlHaSh[ 5] ) << 40; \
- case 5: b_PeRlHaSh |= ( ( U64 )in_PeRlHaSh[ 4] ) << 32; \
- case 4: b_PeRlHaSh |= ( ( U64 )in_PeRlHaSh[ 3] ) << 24; \
- case 3: b_PeRlHaSh |= ( ( U64 )in_PeRlHaSh[ 2] ) << 16; \
- case 2: b_PeRlHaSh |= ( ( U64 )in_PeRlHaSh[ 1] ) << 8; \
- case 1: b_PeRlHaSh |= ( ( U64 )in_PeRlHaSh[ 0] ); break; \
- case 0: break; \
- } \
-\
- v3_PeRlHaSh ^= b_PeRlHaSh; \
- SIPROUND; \
- SIPROUND; \
- v0_PeRlHaSh ^= b_PeRlHaSh; \
-\
- v2_PeRlHaSh ^= 0xff; \
- SIPROUND; \
- SIPROUND; \
- SIPROUND; \
- SIPROUND; \
- b_PeRlHaSh = v0_PeRlHaSh ^ v1_PeRlHaSh ^ v2_PeRlHaSh ^ v3_PeRlHaSh; \
- (hash)= (U32)(b_PeRlHaSh & U32_MAX); \
-} STMT_END
-
-#elif defined(PERL_HASH_FUNC_SUPERFAST)
-#define PERL_HASH_FUNC "SUPERFAST"
-#define PERL_HASH_SEED_BYTES 4
-/* FYI: This is the "Super-Fast" algorithm mentioned by Bob Jenkins in
- * (http://burtleburtle.net/bob/hash/doobs.html)
- * It is by Paul Hsieh (c) 2004 and is analysed here
- * http://www.azillionmonkeys.com/qed/hash.html
- * license terms are here:
- * http://www.azillionmonkeys.com/qed/weblicense.html
- */
-#undef get16bits
-#if (defined(__GNUC__) && defined(__i386__)) || defined(__WATCOMC__) \
- || defined(_MSC_VER) || defined (__BORLANDC__) || defined (__TURBOC__)
-#define get16bits(d) (*((const U16 *) (d)))
-#endif
-
-#if !defined (get16bits)
-#define get16bits(d) ((((const U8 *)(d))[1] << UINT32_C(8))\
- +((const U8 *)(d))[0])
-#endif
-#define PERL_HASH(hash,str,len) \
- STMT_START { \
- const char * const strtmp_PeRlHaSh = (str); \
- const unsigned char *str_PeRlHaSh = (const unsigned char *)strtmp_PeRlHaSh; \
- U32 len_PeRlHaSh = (len); \
- U32 hash_PeRlHaSh = PERL_HASH_SEED_U32 ^ len; \
- U32 tmp_PeRlHaSh; \
- int rem_PeRlHaSh= len_PeRlHaSh & 3; \
- len_PeRlHaSh >>= 2; \
- \
- for (;len_PeRlHaSh > 0; len_PeRlHaSh--) { \
- hash_PeRlHaSh += get16bits (str_PeRlHaSh); \
- tmp_PeRlHaSh = (get16bits (str_PeRlHaSh+2) << 11) ^ hash_PeRlHaSh; \
- hash_PeRlHaSh = (hash_PeRlHaSh << 16) ^ tmp_PeRlHaSh; \
- str_PeRlHaSh += 2 * sizeof (U16); \
- hash_PeRlHaSh += hash_PeRlHaSh >> 11; \
- } \
- \
- /* Handle end cases */ \
- switch (rem_PeRlHaSh) { \
- case 3: hash_PeRlHaSh += get16bits (str_PeRlHaSh); \
- hash_PeRlHaSh ^= hash_PeRlHaSh << 16; \
- hash_PeRlHaSh ^= str_PeRlHaSh[sizeof (U16)] << 18; \
- hash_PeRlHaSh += hash_PeRlHaSh >> 11; \
- break; \
- case 2: hash_PeRlHaSh += get16bits (str_PeRlHaSh); \
- hash_PeRlHaSh ^= hash_PeRlHaSh << 11; \
- hash_PeRlHaSh += hash_PeRlHaSh >> 17; \
- break; \
- case 1: hash_PeRlHaSh += *str_PeRlHaSh; \
- hash_PeRlHaSh ^= hash_PeRlHaSh << 10; \
- hash_PeRlHaSh += hash_PeRlHaSh >> 1; \
- } \
- \
- /* Force "avalanching" of final 127 bits */ \
- hash_PeRlHaSh ^= hash_PeRlHaSh << 3; \
- hash_PeRlHaSh += hash_PeRlHaSh >> 5; \
- hash_PeRlHaSh ^= hash_PeRlHaSh << 4; \
- hash_PeRlHaSh += hash_PeRlHaSh >> 17; \
- hash_PeRlHaSh ^= hash_PeRlHaSh << 25; \
- (hash) = (hash_PeRlHaSh + (hash_PeRlHaSh >> 6)); \
- } STMT_END
-
-#elif defined(PERL_HASH_FUNC_MURMUR3)
-#define PERL_HASH_FUNC "MURMUR3"
-#define PERL_HASH_SEED_BYTES 4
-
-/*-----------------------------------------------------------------------------
- * MurmurHash3 was written by Austin Appleby, and is placed in the public
- * domain.
- *
- * This implementation was originally written by Shane Day, and is also public domain,
- * and was modified to function as a macro similar to other perl hash functions by
- * Yves Orton.
- *
- * This is a portable ANSI C implementation of MurmurHash3_x86_32 (Murmur3A)
- * with support for progressive processing.
- *
- * If you want to understand the MurmurHash algorithm you would be much better
- * off reading the original source. Just point your browser at:
- * http://code.google.com/p/smhasher/source/browse/trunk/MurmurHash3.cpp
- *
- * How does it work?
- *
- * We can only process entire 32 bit chunks of input, except for the very end
- * that may be shorter.
- *
- * To handle endianess I simply use a macro that reads a U32 and define
- * that macro to be a direct read on little endian machines, a read and swap
- * on big endian machines, or a byte-by-byte read if the endianess is unknown.
- */
-
-
-/*-----------------------------------------------------------------------------
- * Endianess, misalignment capabilities and util macros
- *
- * The following 3 macros are defined in this section. The other macros defined
- * are only needed to help derive these 3.
- *
- * MURMUR_READ_UINT32(x) Read a little endian unsigned 32-bit int
- * MURMUR_UNALIGNED_SAFE Defined if READ_UINT32 works on non-word boundaries
- * MURMUR_ROTL32(x,r) Rotate x left by r bits
- */
-
-/* Now find best way we can to READ_UINT32 */
-#if (BYTEORDER == 0x1234 || BYTEORDER == 0x12345678) && U32SIZE == 4
- /* CPU endian matches murmurhash algorithm, so read 32-bit word directly */
- #define MURMUR_READ_UINT32(ptr) (*((U32*)(ptr)))
-#elif BYTEORDER == 0x4321 || BYTEORDER == 0x87654321
- /* TODO: Add additional cases below where a compiler provided bswap32 is available */
- #if defined(__GNUC__) && (__GNUC__>4 || (__GNUC__==4 && __GNUC_MINOR__>=3))
- #define MURMUR_READ_UINT32(ptr) (__builtin_bswap32(*((U32*)(ptr))))
- #else
- /* Without a known fast bswap32 we're just as well off doing this */
- #define MURMUR_READ_UINT32(ptr) (ptr[0]|ptr[1]<<8|ptr[2]<<16|ptr[3]<<24)
- #define MURMUR_UNALIGNED_SAFE
- #endif
-#else
- /* Unknown endianess so last resort is to read individual bytes */
- #define MURMUR_READ_UINT32(ptr) (ptr[0]|ptr[1]<<8|ptr[2]<<16|ptr[3]<<24)
-
- /* Since we're not doing word-reads we can skip the messing about with realignment */
- #define MURMUR_UNALIGNED_SAFE
-#endif
-
-/* Find best way to ROTL32 */
-#if defined(_MSC_VER)
- #include <stdlib.h> /* Microsoft put _rotl declaration in here */
- #define MURMUR_ROTL32(x,r) _rotl(x,r)
-#else
- /* gcc recognises this code and generates a rotate instruction for CPUs with one */
- #define MURMUR_ROTL32(x,r) (((U32)x << r) | ((U32)x >> (32 - r)))
-#endif
-
-
-/*-----------------------------------------------------------------------------
- * Core murmurhash algorithm macros */
-
-#define MURMUR_C1 (0xcc9e2d51)
-#define MURMUR_C2 (0x1b873593)
-#define MURMUR_C3 (0xe6546b64)
-#define MURMUR_C4 (0x85ebca6b)
-#define MURMUR_C5 (0xc2b2ae35)
-
-/* This is the main processing body of the algorithm. It operates
- * on each full 32-bits of input. */
-#define MURMUR_DOBLOCK(h1, k1) STMT_START { \
- k1 *= MURMUR_C1; \
- k1 = MURMUR_ROTL32(k1,15); \
- k1 *= MURMUR_C2; \
- \
- h1 ^= k1; \
- h1 = MURMUR_ROTL32(h1,13); \
- h1 = h1 * 5 + MURMUR_C3; \
-} STMT_END
-
-
-/* Append unaligned bytes to carry, forcing hash churn if we have 4 bytes */
-/* cnt=bytes to process, h1=name of h1 var, c=carry, n=bytes in c, ptr/len=payload */
-#define MURMUR_DOBYTES(cnt, h1, c, n, ptr, len) STMT_START { \
- int MURMUR_DOBYTES_i = cnt; \
- while(MURMUR_DOBYTES_i--) { \
- c = c>>8 | *ptr++<<24; \
- n++; len--; \
- if(n==4) { \
- MURMUR_DOBLOCK(h1, c); \
- n = 0; \
- } \
- } \
-} STMT_END
-
-/* process the last 1..3 bytes and finalize */
-#define MURMUR_FINALIZE(hash, PeRlHaSh_len, PeRlHaSh_k1, PeRlHaSh_h1, PeRlHaSh_carry, PeRlHaSh_bytes_in_carry, PeRlHaSh_ptr, PeRlHaSh_total_length) STMT_START { \
- /* Advance over whole 32-bit chunks, possibly leaving 1..3 bytes */\
- PeRlHaSh_len -= PeRlHaSh_len/4*4; \
- \
- /* Append any remaining bytes into carry */ \
- MURMUR_DOBYTES(PeRlHaSh_len, PeRlHaSh_h1, PeRlHaSh_carry, PeRlHaSh_bytes_in_carry, PeRlHaSh_ptr, PeRlHaSh_len); \
- \
- if (PeRlHaSh_bytes_in_carry) { \
- PeRlHaSh_k1 = PeRlHaSh_carry >> ( 4 - PeRlHaSh_bytes_in_carry ) * 8; \
- PeRlHaSh_k1 *= MURMUR_C1; \
- PeRlHaSh_k1 = MURMUR_ROTL32(PeRlHaSh_k1,15); \
- PeRlHaSh_k1 *= MURMUR_C2; \
- PeRlHaSh_h1 ^= PeRlHaSh_k1; \
- } \
- PeRlHaSh_h1 ^= PeRlHaSh_total_length; \
- \
- /* fmix */ \
- PeRlHaSh_h1 ^= PeRlHaSh_h1 >> 16; \
- PeRlHaSh_h1 *= MURMUR_C4; \
- PeRlHaSh_h1 ^= PeRlHaSh_h1 >> 13; \
- PeRlHaSh_h1 *= MURMUR_C5; \
- PeRlHaSh_h1 ^= PeRlHaSh_h1 >> 16; \
- (hash)= PeRlHaSh_h1; \
-} STMT_END
-
-/* now we create the hash function */
-
-#if defined(UNALIGNED_SAFE)
-#define PERL_HASH(hash,str,len) STMT_START { \
- const char * const s_PeRlHaSh_tmp = (str); \
- const unsigned char *PeRlHaSh_ptr = (const unsigned char *)s_PeRlHaSh_tmp; \
- I32 PeRlHaSh_len = len; \
- \
- U32 PeRlHaSh_h1 = PERL_HASH_SEED_U32; \
- U32 PeRlHaSh_k1; \
- U32 PeRlHaSh_carry = 0; \
- \
- const unsigned char *PeRlHaSh_end; \
- \
- int PeRlHaSh_bytes_in_carry = 0; /* bytes in carry */ \
- I32 PeRlHaSh_total_length= PeRlHaSh_len; \
- \
- /* This CPU handles unaligned word access */ \
- /* Process 32-bit chunks */ \
- PeRlHaSh_end = PeRlHaSh_ptr + PeRlHaSh_len/4*4; \
- for( ; PeRlHaSh_ptr < PeRlHaSh_end ; PeRlHaSh_ptr+=4) { \
- PeRlHaSh_k1 = MURMUR_READ_UINT32(PeRlHaSh_ptr); \
- MURMUR_DOBLOCK(PeRlHaSh_h1, PeRlHaSh_k1); \
- } \
- \
- MURMUR_FINALIZE(hash, PeRlHaSh_len, PeRlHaSh_k1, PeRlHaSh_h1, PeRlHaSh_carry, PeRlHaSh_bytes_in_carry, PeRlHaSh_ptr, PeRlHaSh_total_length);\
- } STMT_END
-#else
-#define PERL_HASH(hash,str,len) STMT_START { \
- const char * const s_PeRlHaSh_tmp = (str); \
- const unsigned char *PeRlHaSh_ptr = (const unsigned char *)s_PeRlHaSh_tmp; \
- I32 PeRlHaSh_len = len; \
- \
- U32 PeRlHaSh_h1 = PERL_HASH_SEED_U32; \
- U32 PeRlHaSh_k1; \
- U32 PeRlHaSh_carry = 0; \
- \
- const unsigned char *PeRlHaSh_end; \
- \
- int PeRlHaSh_bytes_in_carry = 0; /* bytes in carry */ \
- I32 PeRlHaSh_total_length= PeRlHaSh_len; \
- \
- /* This CPU does not handle unaligned word access */ \
- \
- /* Consume enough so that the next data byte is word aligned */ \
- int PeRlHaSh_i = -(long)PeRlHaSh_ptr & 3; \
- if(PeRlHaSh_i && PeRlHaSh_i <= PeRlHaSh_len) { \
- MURMUR_DOBYTES(PeRlHaSh_i, PeRlHaSh_h1, PeRlHaSh_carry, PeRlHaSh_bytes_in_carry, PeRlHaSh_ptr, PeRlHaSh_len);\
- } \
- \
- /* We're now aligned. Process in aligned blocks. Specialise for each possible carry count */ \
- PeRlHaSh_end = PeRlHaSh_ptr + PeRlHaSh_len/4*4; \
- switch(PeRlHaSh_bytes_in_carry) { /* how many bytes in carry */ \
- case 0: /* c=[----] w=[3210] b=[3210]=w c'=[----] */ \
- for( ; PeRlHaSh_ptr < PeRlHaSh_end ; PeRlHaSh_ptr+=4) { \
- PeRlHaSh_k1 = MURMUR_READ_UINT32(PeRlHaSh_ptr); \
- MURMUR_DOBLOCK(PeRlHaSh_h1, PeRlHaSh_k1); \
- } \
- break; \
- case 1: /* c=[0---] w=[4321] b=[3210]=c>>24|w<<8 c'=[4---] */ \
- for( ; PeRlHaSh_ptr < PeRlHaSh_end ; PeRlHaSh_ptr+=4) { \
- PeRlHaSh_k1 = PeRlHaSh_carry>>24; \
- PeRlHaSh_carry = MURMUR_READ_UINT32(PeRlHaSh_ptr); \
- PeRlHaSh_k1 |= PeRlHaSh_carry<<8; \
- MURMUR_DOBLOCK(PeRlHaSh_h1, PeRlHaSh_k1); \
- } \
- break; \
- case 2: /* c=[10--] w=[5432] b=[3210]=c>>16|w<<16 c'=[54--] */ \
- for( ; PeRlHaSh_ptr < PeRlHaSh_end ; PeRlHaSh_ptr+=4) { \
- PeRlHaSh_k1 = PeRlHaSh_carry>>16; \
- PeRlHaSh_carry = MURMUR_READ_UINT32(PeRlHaSh_ptr); \
- PeRlHaSh_k1 |= PeRlHaSh_carry<<16; \
- MURMUR_DOBLOCK(PeRlHaSh_h1, PeRlHaSh_k1); \
- } \
- break; \
- case 3: /* c=[210-] w=[6543] b=[3210]=c>>8|w<<24 c'=[654-] */ \
- for( ; PeRlHaSh_ptr < PeRlHaSh_end ; PeRlHaSh_ptr+=4) { \
- PeRlHaSh_k1 = PeRlHaSh_carry>>8; \
- PeRlHaSh_carry = MURMUR_READ_UINT32(PeRlHaSh_ptr); \
- PeRlHaSh_k1 |= PeRlHaSh_carry<<24; \
- MURMUR_DOBLOCK(PeRlHaSh_h1, PeRlHaSh_k1); \
- } \
- } \
- \
- MURMUR_FINALIZE(hash, PeRlHaSh_len, PeRlHaSh_k1, PeRlHaSh_h1, PeRlHaSh_carry, PeRlHaSh_bytes_in_carry, PeRlHaSh_ptr, PeRlHaSh_total_length);\
- } STMT_END
-#endif
-
-#elif defined(PERL_HASH_FUNC_DJB2)
-#define PERL_HASH_FUNC "DJB2"
-#define PERL_HASH_SEED_BYTES 4
-#define PERL_HASH(hash,str,len) \
- STMT_START { \
- const char * const s_PeRlHaSh_tmp = (str); \
- const unsigned char *s_PeRlHaSh = (const unsigned char *)s_PeRlHaSh_tmp; \
- I32 i_PeRlHaSh = len; \
- U32 hash_PeRlHaSh = PERL_HASH_SEED_U32 ^ len; \
- while (i_PeRlHaSh--) { \
- hash_PeRlHaSh = ((hash_PeRlHaSh << 5) + hash_PeRlHaSh) + *s_PeRlHaSh++; \
- } \
- (hash) = hash_PeRlHaSh;\
- } STMT_END
-
-#elif defined(PERL_HASH_FUNC_SDBM)
-#define PERL_HASH_FUNC "SDBM"
-#define PERL_HASH_SEED_BYTES 4
-#define PERL_HASH(hash,str,len) \
- STMT_START { \
- const char * const s_PeRlHaSh_tmp = (str); \
- const unsigned char *s_PeRlHaSh = (const unsigned char *)s_PeRlHaSh_tmp; \
- I32 i_PeRlHaSh = len; \
- U32 hash_PeRlHaSh = PERL_HASH_SEED_U32 ^ len; \
- while (i_PeRlHaSh--) { \
- hash_PeRlHaSh = (hash_PeRlHaSh << 6) + (hash_PeRlHaSh << 16) - hash_PeRlHaSh + *s_PeRlHaSh++; \
- } \
- (hash) = hash_PeRlHaSh;\
- } STMT_END
-
-#elif defined(PERL_HASH_FUNC_ONE_AT_A_TIME) || defined(PERL_HASH_FUNC_ONE_AT_A_TIME_OLD)
-
-#define PERL_HASH_SEED_BYTES 4
-
-#ifdef PERL_HASH_FUNC_ONE_AT_A_TIME
-/* new version, add the length to the seed so that adding characters changes the "seed" being used. */
-#define PERL_HASH_FUNC "ONE_AT_A_TIME"
-#define MIX_SEED_AND_LEN(seed,len) (seed + len)
-#else
-/* old version, just use the seed. - not recommended */
-#define PERL_HASH_FUNC "ONE_AT_A_TIME_OLD"
-#define MIX_SEED_AND_LEN(seed,len) (seed)
-#endif
-
-/* FYI: This is the "One-at-a-Time" algorithm by Bob Jenkins
- * from requirements by Colin Plumb.
- * (http://burtleburtle.net/bob/hash/doobs.html) */
-#define PERL_HASH(hash,str,len) \
- STMT_START { \
- const char * const s_PeRlHaSh_tmp = (str); \
- const unsigned char *s_PeRlHaSh = (const unsigned char *)s_PeRlHaSh_tmp; \
- const unsigned char *end_PeRlHaSh = (const unsigned char *)s_PeRlHaSh_tmp + (len); \
- U32 hash_PeRlHaSh = MIX_SEED_AND_LEN(PERL_HASH_SEED_U32, len); \
- while (s_PeRlHaSh < end_PeRlHaSh) { \
- hash_PeRlHaSh += (U8)*s_PeRlHaSh++; \
- hash_PeRlHaSh += (hash_PeRlHaSh << 10); \
- hash_PeRlHaSh ^= (hash_PeRlHaSh >> 6); \
- } \
- hash_PeRlHaSh += (hash_PeRlHaSh << 3); \
- hash_PeRlHaSh ^= (hash_PeRlHaSh >> 11); \
- (hash) = (hash_PeRlHaSh + (hash_PeRlHaSh << 15)); \
- } STMT_END
-#endif
-#ifndef PERL_HASH
-#error "No hash function defined!"
-#endif
/*
=head1 Hash Manipulation Functions
=cut
*/
+#define PERL_HASH_DEFAULT_HvMAX 7
+
/* these hash entry flags ride on hent_klen (for use only in magic/tied HVs) */
#define HEf_SVKEY -2 /* hent_key is an SV* */
# define Nullhv Null(HV*)
#endif
#define HvARRAY(hv) ((hv)->sv_u.svu_hash)
-#define HvFILL(hv) Perl_hv_fill(aTHX_ (const HV *)(hv))
+#define HvFILL(hv) Perl_hv_fill(aTHX_ MUTABLE_HV(hv))
#define HvMAX(hv) ((XPVHV*) SvANY(hv))->xhv_max
/* This quite intentionally does no flag checking first. That's your
responsibility. */
#define HvEITER_set(hv,e) Perl_hv_eiter_set(aTHX_ MUTABLE_HV(hv), e)
#define HvRITER_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_riter : -1)
#define HvEITER_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_eiter : NULL)
+#define HvRAND_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_rand : 0)
+#define HvLASTRAND_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_last_rand : 0)
+
#define HvNAME(hv) HvNAME_get(hv)
#define HvNAMELEN(hv) HvNAMELEN_get(hv)
#define HvENAME(hv) HvENAME_get(hv)
#define newHV() MUTABLE_HV(newSV_type(SVt_PVHV))
+#include "hv_func.h"
+
/*
* Local variables:
* c-indentation-style: bsd
https://perl5.git.perl.org / perl5.git / blobdiff