Module: MurmurHash3::Native32

Defined in:
ext/murmurhash3/murmur3.c

Instance Method Summary collapse

Instance Method Details

#murmur3_32_fmix(integer) ⇒ Object

end of MurmurHash3 algorithm



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# File 'ext/murmurhash3/murmur3.c', line 301

static VALUE
rb_fmix32(VALUE self, VALUE integer)
{
    uint32_t _int = NUM2UINT(integer);
    return UINT2NUM(fmix32(_int));
}

#murmur3_32_int32_hash(*args) ⇒ Object 



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# File 'ext/murmurhash3/murmur3.c', line 412

static VALUE
rb_murmur3_32_int32_hash(int argc, VALUE* argv, VALUE self)
{
    uint32_t _int;
    uint32_t result;

    if (argc == 0 || argc > 2) {
	rb_raise(rb_eArgError, "accept 1 or 2 arguments: (int32[, seed])");
    }
    _int = NUM2UINT(argv[0]);

    result = MurmurHash3_x86_32(&_int, 4, argc == 1 ? 0 : NUM2UINT(argv[1]));

    return UINT2NUM(result);
}

#murmur3_32_int64_hash(*args) ⇒ Object 



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# File 'ext/murmurhash3/murmur3.c', line 428

static VALUE
rb_murmur3_32_int64_hash(int argc, VALUE* argv, VALUE self)
{
    uint64_t _int;
    uint32_t result;

    if (argc == 0 || argc > 2) {
	rb_raise(rb_eArgError, "accept 1 or 2 arguments: (int64[, seed])");
    }
#if SIZEOF_LONG == 8
    _int = NUM2ULONG(argv[0]);
#else
    _int = NUM2ULL(argv[0]);
#endif

    result = MurmurHash3_x86_32(&_int, 8, argc == 1 ? 0 : NUM2UINT(argv[1]));

    return UINT2NUM(result);
}

#murmur3_32_str_base64digest(*args) ⇒ Object 



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# File 'ext/murmurhash3/murmur3.c', line 382

static VALUE
rb_murmur3_32_str_base64digest(int argc, VALUE *argv, VALUE self)
{
    union {
        uint32_t result;
        unsigned char res[6];
    } r;
    char out[8];
    int i;
    r.result = rb_murmur3_32_hash(argc, argv, self);
#if WORDS_BIGENDIAN
    SWAP_32_INT(r.result);
#endif
    r.res[4] = 0;
    r.res[5] = 0;
    for(i = 0; i<2; i++) {
        uint32_t b64 =
                ((uint32_t)r.res[i*3+0] << 16) |
                ((uint32_t)r.res[i*3+1] << 8) |
                 (uint32_t)r.res[i*3+2];
        out[i*4+0] = base64[(b64 >> 18) & 0x3f];
        out[i*4+1] = base64[(b64 >> 12) & 0x3f];
        out[i*4+2] = base64[(b64 >>  6) & 0x3f];
        out[i*4+3] = base64[(b64 >>  0) & 0x3f];
    }
    out[6] = '=';
    out[7] = '=';
    return rb_str_new(out, sizeof(out));
}

#murmur3_32_str_digest(*args) ⇒ Object 



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# File 'ext/murmurhash3/murmur3.c', line 344

static VALUE
rb_murmur3_32_str_digest(int argc, VALUE* argv, VALUE self)
{
    union {
        uint32_t result;
        char     res[4];
    } r;

    r.result = rb_murmur3_32_hash(argc, argv, self);
#if WORDS_BIGENDIAN
    SWAP_32_INT(r.result);
#endif

    return rb_str_new(r.res, 4);
}

#murmur3_32_str_hash(*args) ⇒ Object 



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# File 'ext/murmurhash3/murmur3.c', line 334

static VALUE
rb_murmur3_32_str_hash(int argc, VALUE* argv, VALUE self)
{
    return UINT2NUM(rb_murmur3_32_hash(argc, argv, self));
}

#murmur3_32_str_hexdigest(*args) ⇒ Object 



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# File 'ext/murmurhash3/murmur3.c', line 360

static VALUE
rb_murmur3_32_str_hexdigest(int argc, VALUE* argv, VALUE self)
{
    union {
        uint32_t result;
        unsigned char res[4];
    } r;
    char out[8];
    int i;

    r.result = rb_murmur3_32_hash(argc, argv, self);
#if WORDS_BIGENDIAN
    SWAP_32_INT(r.result);
#endif
    for(i = 0; i<4; i++) {
        out[i*2] = hex[r.res[i]*2];
        out[i*2+1] = hex[r.res[i]*2+1];
    }

    return rb_str_new(out, 8);
}