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✏️ /usr/lib/x86_64-linux-gnu/perl/5.38.2/CORE/zaphod32_hash.h

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#ifndef DEBUG_ZAPHOD32_HASH
#define DEBUG_ZAPHOD32_HASH 0

#if DEBUG_ZAPHOD32_HASH == 1
#include <stdio.h>
#define ZAPHOD32_WARN6(pat,v0,v1,v2,v3,v4,v5)    printf(pat, v0, v1, v2, v3, v4, v5)
#define ZAPHOD32_WARN5(pat,v0,v1,v2,v3,v4)       printf(pat, v0, v1, v2, v3, v4)
#define ZAPHOD32_WARN4(pat,v0,v1,v2,v3)          printf(pat, v0, v1, v2, v3)
#define ZAPHOD32_WARN3(pat,v0,v1,v2)             printf(pat, v0, v1, v2)
#define ZAPHOD32_WARN2(pat,v0,v1)                printf(pat, v0, v1)
#define NOTE3(pat,v0,v1,v2)             printf(pat, v0, v1, v2)
#elif DEBUG_ZAPHOD32_HASH == 2
#define ZAPHOD32_WARN6(pat,v0,v1,v2,v3,v4,v5)
#define ZAPHOD32_WARN5(pat,v0,v1,v2,v3,v4)
#define ZAPHOD32_WARN4(pat,v0,v1,v2,v3)
#define ZAPHOD32_WARN3(pat,v0,v1,v2)
#define ZAPHOD32_WARN2(pat,v0,v1)
#define NOTE3(pat,v0,v1,v2)             printf(pat, v0, v1, v2)
#else
#define ZAPHOD32_WARN6(pat,v0,v1,v2,v3,v4,v5)
#define ZAPHOD32_WARN5(pat,v0,v1,v2,v3,v4)
#define ZAPHOD32_WARN4(pat,v0,v1,v2,v3)
#define ZAPHOD32_WARN3(pat,v0,v1,v2)
#define NOTE3(pat,v0,v1,v2)
#define ZAPHOD32_WARN2(pat,v0,v1)
#endif

/* Find best way to ROTL32/ROTL64 */
#ifndef ROTL32
#if defined(_MSC_VER)
#include <stdlib.h>  /* Microsoft put _rotl declaration in here */
#define ROTL32(x,r)  _rotl(x,r)
#define ROTR32(x,r)  _rotr(x,r)
#else
/* gcc recognises this code and generates a rotate instruction for CPUs with one */
#define ROTL32(x,r)  (((U32)(x) << (r)) | ((U32)(x) >> (32 - (r))))
#define ROTR32(x,r)  (((U32)(x) << (32 - (r))) | ((U32)(x) >> (r)))
#endif
#endif

#ifndef PERL_SEEN_HV_FUNC_H_
#if !defined(U64)
#include <stdint.h>
#define U64 uint64_t
#endif

#if !defined(U32)
#define U32 uint32_t
#endif

#if !defined(U8)
#define U8 unsigned char
#endif

#if !defined(U16)
#define U16 uint16_t
#endif

#ifndef STRLEN
#define STRLEN int
#endif
#endif

#ifndef ZAPHOD32_STATIC_INLINE
#ifdef PERL_STATIC_INLINE
#define ZAPHOD32_STATIC_INLINE PERL_STATIC_INLINE
#else
#define ZAPHOD32_STATIC_INLINE static inline
#endif
#endif

#ifndef STMT_START
#define STMT_START do
#define STMT_END while(0)
#endif

/* This is two marsaglia xor-shift permutes, with a prime-multiple
 * sandwiched inside. The end result of doing this twice with different
 * primes is a completely avalanched v.  */
#define ZAPHOD32_SCRAMBLE32(v,prime) STMT_START {  \
    v ^= (v>>9);                        \
    v ^= (v<<21);                       \
    v ^= (v>>16);                       \
    v *= prime;                         \
    v ^= (v>>17);                       \
    v ^= (v<<15);                       \
    v ^= (v>>23);                       \
} STMT_END

#define ZAPHOD32_FINALIZE(v0,v1,v2) STMT_START {          \
    ZAPHOD32_WARN3("v0=%08x v1=%08x v2=%08x - ZAPHOD32 FINALIZE\n", \
            (unsigned int)v0, (unsigned int)v1, (unsigned int)v2);  \
    v2 += v0;                       \
    v1 -= v2;                       \
    v1 = ROTL32(v1,  6);           \
    v2 ^= v1;                       \
    v2 = ROTL32(v2, 28);           \
    v1 ^= v2;                       \
    v0 += v1;                       \
    v1 = ROTL32(v1, 24);           \
    v2 += v1;                       \
    v2 = ROTL32(v2, 18) + v1;      \
    v0 ^= v2;                       \
    v0 = ROTL32(v0, 20);           \
    v2 += v0;                       \
    v1 ^= v2;                       \
    v0 += v1;                       \
    v0 = ROTL32(v0,  5);           \
    v2 += v0;                       \
    v2 = ROTL32(v2, 22);           \
    v0 -= v1;                       \
    v1 -= v2;                       \
    v1 = ROTL32(v1, 17);           \
} STMT_END

#define ZAPHOD32_MIX(v0,v1,v2,text) STMT_START {                              \
    ZAPHOD32_WARN4("v0=%08x v1=%08x v2=%08x - ZAPHOD32 %s MIX\n",                   \
            (unsigned int)v0,(unsigned int)v1,(unsigned int)v2, text );  \
    v0 = ROTL32(v0,16) - v2;   \
    v1 = ROTR32(v1,13) ^ v2;   \
    v2 = ROTL32(v2,17) + v1;   \
    v0 = ROTR32(v0, 2) + v1;   \
    v1 = ROTR32(v1,17) - v0;   \
    v2 = ROTR32(v2, 7) ^ v0;   \
} STMT_END

ZAPHOD32_STATIC_INLINE
void zaphod32_seed_state (
    const U8 *seed_ch,
    U8 *state_ch
) {
    const U32 *seed= (const U32 *)seed_ch;
    U32 *state= (U32 *)state_ch;
  
    /* hex expansion of PI, skipping first two digits. PI= 3.2[43f6...]
     *
     * PI value in hex from here:
     *
     * http://turner.faculty.swau.edu/mathematics/materialslibrary/pi/pibases.html
     *
     * Ensure that the three state vectors are nonzero regardless of
     * the seed. The idea of these two steps is to ensure that the 0
     * state comes from a seed utterly unlike that of the value we
     * replace it with.
     */
    state[0]= seed[0] ^ 0x43f6a888;
    state[1]= seed[1] ^ 0x5a308d31;
    state[2]= seed[2] ^ 0x3198a2e0;
    if (!state[0]) state[0] = 1;
    if (!state[1]) state[1] = 2;
    if (!state[2]) state[2] = 4;
    /* these are pseudo-randomly selected primes between 2**31 and 2**32
     * (I generated a big list and then randomly chose some from the list) */
    ZAPHOD32_SCRAMBLE32(state[0],0x9fade23b);
    ZAPHOD32_SCRAMBLE32(state[1],0xaa6f908d);
    ZAPHOD32_SCRAMBLE32(state[2],0xcdf6b72d);

/* now that we have scrambled we do some mixing to avalanche the
     * state bits to gether */
    ZAPHOD32_MIX(state[0],state[1],state[2],"ZAPHOD32 SEED-STATE A 1/4");
    ZAPHOD32_MIX(state[0],state[1],state[2],"ZAPHOD32 SEED-STATE A 2/4");
    ZAPHOD32_MIX(state[0],state[1],state[2],"ZAPHOD32 SEED-STATE A 3/4");
    ZAPHOD32_MIX(state[0],state[1],state[2],"ZAPHOD32 SEED-STATE A 4/4");

/* and then scramble them again with different primes */
    ZAPHOD32_SCRAMBLE32(state[0],0xc95d22a9);
    ZAPHOD32_SCRAMBLE32(state[1],0x8497242b);
    ZAPHOD32_SCRAMBLE32(state[2],0x9c5cc4e9);

/* and a thorough final mix */
    ZAPHOD32_MIX(state[0],state[1],state[2],"ZAPHOD32 SEED-STATE B 1/5");
    ZAPHOD32_MIX(state[0],state[1],state[2],"ZAPHOD32 SEED-STATE B 2/5");
    ZAPHOD32_MIX(state[0],state[1],state[2],"ZAPHOD32 SEED-STATE B 3/5");
    ZAPHOD32_MIX(state[0],state[1],state[2],"ZAPHOD32 SEED-STATE B 4/5");
    ZAPHOD32_MIX(state[0],state[1],state[2],"ZAPHOD32 SEED-STATE B 5/5");

}

ZAPHOD32_STATIC_INLINE
U32 zaphod32_hash_with_state(
    const U8 *state_ch,
    const U8 *key,
    const STRLEN key_len
) {
    const U32 *state= (const U32 *)state_ch;
    const U8 *end;
    STRLEN len = key_len;
    U32 v0= state[0];
    U32 v1= state[1];
    U32 v2= state[2] ^ (0xC41A7AB1 * ((U32)key_len + 1));

ZAPHOD32_WARN4("v0=%08x v1=%08x v2=%08x ln=%08x HASH START\n",
            (unsigned int)state[0], (unsigned int)state[1],
            (unsigned int)state[2], (unsigned int)key_len);
    {
        switch (len) {
            default: goto zaphod32_read8;
            case 12: v2 += (U32)key[11] << 24;  /* FALLTHROUGH */
            case 11: v2 += (U32)key[10] << 16;  /* FALLTHROUGH */
            case 10: v2 += (U32)U8TO16_LE(key+8);
                     v1 -= U8TO32_LE(key+4);
                     v0 += U8TO32_LE(key+0);
                     goto zaphod32_finalize;
            case 9: v2 += (U32)key[8];          /* FALLTHROUGH */
            case 8: v1 -= U8TO32_LE(key+4);
                    v0 += U8TO32_LE(key+0);
                    goto zaphod32_finalize;
            case 7: v2 += (U32)key[6];          /* FALLTHROUGH */
            case 6: v0 += (U32)U8TO16_LE(key+4);
                    v1 -= U8TO32_LE(key+0);
                    goto zaphod32_finalize;
            case 5: v0 += (U32)key[4];          /* FALLTHROUGH */
            case 4: v1 -= U8TO32_LE(key+0);
                    goto zaphod32_finalize;
            case 3: v2 += (U32)key[2];          /* FALLTHROUGH */
            case 2: v0 += (U32)U8TO16_LE(key);
                    break;
            case 1: v0 += (U32)key[0];
                    break;
            case 0: v2 ^= 0xFF;
                    break;

}
        v0 -= v2;
        v2 = ROTL32(v2, 8) ^ v0;
        v0 = ROTR32(v0,16) + v2;
        v2 += v0;
        v0 += v0 >> 9;
        v0 += v2;
        v2 ^= v0;
        v2 += v2 << 4;
        v0 -= v2;
        v2 = ROTR32(v2, 8) ^ v0;
        v0 = ROTL32(v0,16) ^ v2;
        v2 = ROTL32(v2,10) + v0;
        v0 = ROTR32(v0,30) + v2;
        v2 = ROTR32(v2,12);
        return v0 ^ v2;
    }

/*  if (len >= 8) */ /* this block is only reached by a goto above, so this condition
                        is commented out, but if the above block is removed it would
                        be necessary to use this. */
    {
zaphod32_read8:
        len = key_len & 0x7;
        end = key + key_len - len;
        do {
            v1 -= U8TO32_LE(key+0);
            v0 += U8TO32_LE(key+4);
            ZAPHOD32_MIX(v0,v1,v2,"MIX 2-WORDS A");
            key += 8;
        } while ( key < end );
    }

if ( len >= 4 ) {
        v1 -= U8TO32_LE(key);
        key += 4;
    }

v0 += (U32)(key_len) << 24;
    switch (len & 0x3) {
        case 3: v2 += (U32)key[2];          /* FALLTHROUGH */
        case 2: v0 += (U32)U8TO16_LE(key);
                break;
        case 1: v0 += (U32)key[0];
                break;
        case 0: v2 ^= 0xFF;
                break;
    }
zaphod32_finalize:
    ZAPHOD32_FINALIZE(v0,v1,v2);

ZAPHOD32_WARN4("v0=%08x v1=%08x v2=%08x hh=%08x - FINAL\n\n",
            (unsigned int)v0, (unsigned int)v1, (unsigned int)v2,
            (unsigned int)v0 ^ v1 ^ v2);

return v0 ^ v1 ^ v2;
}

ZAPHOD32_STATIC_INLINE U32 zaphod32_hash(
    const U8 *seed_ch,
    const U8 *key,
    const STRLEN key_len
) {
    U32 state[3];
    zaphod32_seed_state(seed_ch,(U8*)state);
    return zaphod32_hash_with_state((U8*)state,key,key_len);
}

#endif

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⬅ 5.38.2 85 item

Nama	Tipe	Ukuran	Diubah	Perm	Aksi
📄 EXTERN.h	h	1.5 KB	12/06/26 13:42	0644	✏️ ⬇
📄 INTERN.h	h	1.3 KB	12/06/26 13:42	0644	✏️ ⬇
📄 XSUB.h	h	23.7 KB	12/06/26 13:42	0644	✏️ ⬇
📄 av.h	h	6.8 KB	12/06/26 13:42	0644	✏️ ⬇
📄 bitcount.h	h	1 KB	12/06/26 13:42	0644	✏️ ⬇
📄 charclass_invlists.h	h	4.3 MB	12/06/26 13:42	0644	✏️ ⬇
📄 config.h	h	164.7 KB	12/06/26 13:42	0644	✏️ ⬇
📄 cop.h	h	57.2 KB	12/06/26 13:42	0644	✏️ ⬇
📄 cv.h	h	14.3 KB	12/06/26 13:42	0644	✏️ ⬇
📄 dosish.h	h	3.6 KB	12/06/26 13:42	0644	✏️ ⬇
📄 ebcdic_tables.h	h	48.8 KB	12/06/26 13:42	0644	✏️ ⬇
📄 embed.h	h	143.5 KB	12/06/26 13:42	0644	✏️ ⬇
📄 embedvar.h	h	23.9 KB	12/06/26 13:42	0644	✏️ ⬇
📄 fakesdio.h	h	3.1 KB	12/06/26 13:42	0644	✏️ ⬇
📄 feature.h	h	15 KB	12/06/26 13:42	0644	✏️ ⬇
📄 form.h	h	1.4 KB	12/06/26 13:42	0644	✏️ ⬇
📄 git_version.h	h	357 B	12/06/26 13:42	0644	✏️ ⬇
📄 gv.h	h	11.7 KB	12/06/26 13:42	0644	✏️ ⬇
📄 handy.h	h	141.9 KB	12/06/26 13:42	0644	✏️ ⬇
📄 hv.h	h	27.6 KB	12/06/26 13:42	0644	✏️ ⬇
📄 hv_func.h	h	7.7 KB	12/06/26 13:42	0644	✏️ ⬇
📄 hv_macro.h	h	3.1 KB	12/06/26 13:42	0644	✏️ ⬇
📄 inline.h	h	111.9 KB	12/06/26 13:42	0644	✏️ ⬇
📄 intrpvar.h	h	37.9 KB	12/06/26 13:42	0644	✏️ ⬇
📄 invlist_inline.h	h	11.2 KB	12/06/26 13:42	0644	✏️ ⬇
📄 iperlsys.h	h	62.5 KB	12/06/26 13:42	0644	✏️ ⬇
📄 keywords.h	h	6.6 KB	12/06/26 13:42	0644	✏️ ⬇
📄 l1_char_class_tab.h	h	118.1 KB	12/06/26 13:42	0644	✏️ ⬇
📄 malloc_ctl.h	h	1.5 KB	12/06/26 13:42	0644	✏️ ⬇
📄 metaconfig.h	h	705 B	12/06/26 13:42	0644	✏️ ⬇
📄 mg.h	h	3.6 KB	12/06/26 13:42	0644	✏️ ⬇
📄 mg_data.h	h	5.5 KB	12/06/26 13:42	0644	✏️ ⬇
📄 mg_raw.h	h	4.7 KB	12/06/26 13:42	0644	✏️ ⬇
📄 mg_vtable.h	h	10.3 KB	12/06/26 13:42	0644	✏️ ⬇
📄 mydtrace.h	h	1.7 KB	12/06/26 13:42	0644	✏️ ⬇
📄 nostdio.h	h	3.3 KB	12/06/26 13:42	0644	✏️ ⬇
📄 op.h	h	40.9 KB	12/06/26 13:42	0644	✏️ ⬇
📄 op_reg_common.h	h	5.9 KB	12/06/26 13:42	0644	✏️ ⬇
📄 opcode.h	h	95.8 KB	12/06/26 13:42	0644	✏️ ⬇
📄 opnames.h	h	9.2 KB	12/06/26 13:42	0644	✏️ ⬇
📄 overload.h	h	3.2 KB	12/06/26 13:42	0644	✏️ ⬇
📄 pad.h	h	19.6 KB	12/06/26 13:42	0644	✏️ ⬇
📄 parser.h	h	6.9 KB	12/06/26 13:42	0644	✏️ ⬇
📄 patchlevel-debian.h	h	6.2 KB	12/06/26 13:42	0644	✏️ ⬇
📄 patchlevel.h	h	6.5 KB	12/06/26 13:42	0644	✏️ ⬇
📄 perl.h	h	320.4 KB	12/06/26 13:42	0644	✏️ ⬇
📄 perl_inc_macro.h	h	5.9 KB	12/06/26 13:42	0644	✏️ ⬇
📄 perl_langinfo.h	h	2.8 KB	12/06/26 13:42	0644	✏️ ⬇
📄 perl_siphash.h	h	5.1 KB	12/06/26 13:42	0644	✏️ ⬇
📄 perlapi.h	h	635 B	12/06/26 13:42	0644	✏️ ⬇
📄 perlio.h	h	9.5 KB	12/06/26 13:42	0644	✏️ ⬇
📄 perliol.h	h	13.3 KB	12/06/26 13:42	0644	✏️ ⬇
📄 perlsdio.h	h	527 B	12/06/26 13:42	0644	✏️ ⬇
📄 perlstatic.h	h	894 B	12/06/26 13:42	0644	✏️ ⬇
📄 perlvars.h	h	16.8 KB	12/06/26 13:42	0644	✏️ ⬇
📄 perly.h	h	5.7 KB	12/06/26 13:42	0644	✏️ ⬇
📄 pp.h	h	30 KB	12/06/26 13:42	0644	✏️ ⬇
📄 pp_proto.h	h	20.4 KB	12/06/26 13:42	0644	✏️ ⬇
📄 proto.h	h	327.9 KB	12/06/26 13:42	0644	✏️ ⬇
📄 reentr.h	h	85.2 KB	12/06/26 13:42	0644	✏️ ⬇
📄 regcharclass.h	h	270.3 KB	12/06/26 13:42	0644	✏️ ⬇
📄 regcomp.h	h	68 KB	12/06/26 13:42	0644	✏️ ⬇
📄 regcomp_internal.h	h	60.7 KB	12/06/26 13:42	0644	✏️ ⬇
📄 regexp.h	h	43.7 KB	12/06/26 13:42	0644	✏️ ⬇
📄 reginline.h	h	1.5 KB	12/06/26 13:42	0644	✏️ ⬇
📄 regnodes.h	h	127 KB	12/06/26 13:42	0644	✏️ ⬇
📄 sbox32_hash.h	h	54.4 KB	12/06/26 13:42	0644	✏️ ⬇
📄 scope.h	h	12.2 KB	12/06/26 13:42	0644	✏️ ⬇
📄 scope_types.h	h	5.1 KB	12/06/26 13:42	0644	✏️ ⬇
📄 sv.h	h	105.6 KB	12/06/26 13:42	0644	✏️ ⬇
📄 sv_inline.h	h	27.7 KB	12/06/26 13:42	0644	✏️ ⬇
📄 thread.h	h	19.5 KB	12/06/26 13:42	0644	✏️ ⬇
📄 time64.h	h	900 B	12/06/26 13:42	0644	✏️ ⬇
📄 time64_config.h	h	2 KB	12/06/26 13:42	0644	✏️ ⬇
📄 uconfig.h	h	164.4 KB	12/06/26 13:42	0644	✏️ ⬇
📄 uni_keywords.h	h	557.4 KB	12/06/26 13:42	0644	✏️ ⬇
📄 unicode_constants.h	h	56.4 KB	12/06/26 13:42	0644	✏️ ⬇
📄 unixish.h	h	5.5 KB	12/06/26 13:42	0644	✏️ ⬇
📄 utf8.h	h	59.9 KB	12/06/26 13:42	0644	✏️ ⬇
📄 utfebcdic.h	h	11.5 KB	12/06/26 13:42	0644	✏️ ⬇
📄 util.h	h	10.5 KB	12/06/26 13:42	0644	✏️ ⬇
📄 uudmap.h	h	1 KB	12/06/26 13:42	0644	✏️ ⬇
📄 vutil.h	h	4 KB	12/06/26 13:42	0644	✏️ ⬇
📄 warnings.h	h	11.7 KB	12/06/26 13:42	0644	✏️ ⬇
📄 zaphod32_hash.h	h	9.5 KB	12/06/26 13:42	0644	✏️ ⬇

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