Nelze vybrat více než 25 témat
Téma musí začínat písmenem nebo číslem, může obsahovat pomlčky („-“) a může být dlouhé až 35 znaků.
435 řádky
14 KiB
435 řádky
14 KiB
#include <stdint.h>
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#include <string.h>
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#include "erl_nif.h"
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typedef struct {
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size_t keySize;
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size_t bblSize_1;
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size_t bblSize_2;
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struct _bbl **arrayPtr;
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} hashb;
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typedef struct _bbl {
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struct _node *head;
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} bbl;
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typedef struct _node {
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struct _node *next;
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ErlNifBinary Key;
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ErlNifBinary Value;
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} node;
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#define BBLSIZE_1 128
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#define BBLSIZE_2 128
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static ErlNifResourceType *ResType = NULL;
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static ERL_NIF_TERM undefined;
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static ERL_NIF_TERM ok;
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///////////////////////////////hash 函数 /////////////////////////////
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static uint32_t fnv_hash(const unsigned char *data, size_t size, uint32_t salt) {
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uint32_t i;
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uint64_t hashv;
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const unsigned char *_hf_key = (const unsigned char *) (data);
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hashv = 2166136261;
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for (i = 0; i < size; i++) {
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hashv = hashv ^ _hf_key[i];
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hashv = hashv * 16777619;
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}
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//enif_fprintf(stdout, "IMY************get %T \n", argv[1]);
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return hashv;
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}
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static uint32_t murmurhash(const unsigned char *key, uint32_t len, uint32_t seed) {
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//uint32_t c1 = 0xcc9e2d51;
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//uint32_t c2 = 0x1b873593;
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//uint32_t r1 = 15;
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//uint32_t r2 = 13;
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//uint32_t m = 5;
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//uint32_t n = 0xe6546b64;
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uint32_t h = 0;
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uint32_t k = 0;
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uint8_t *d = (uint8_t *) key; // 32 bit extract from `key'
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const uint32_t *chunks = NULL;
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const uint8_t *tail = NULL; // tail - last 8 bytes
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int i = 0;
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int l = len / 4; // chunk length
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h = seed;
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chunks = (const uint32_t *) (d + l * 4); // body
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tail = (const uint8_t *) (d + l * 4); // last 8 byte chunk of `key'
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// for each 4 byte chunk of `key'
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for (i = -l; i != 0; ++i) {
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// next 4 byte chunk of `key'
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k = chunks[i];
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// encode next 4 byte chunk of `key'
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k *= 0xcc9e2d51;
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k = (k << 15) | (k >> (32 - 15));
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k *= 0x1b873593;
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// append to hash
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h ^= k;
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h = (h << 13) | (h >> (32 - 13));
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h = h * 5 + 0xe6546b64;
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}
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k = 0;
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// remainder
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switch (len & 3) { // `len % 4'
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case 3:
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k ^= (tail[2] << 16);
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case 2:
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k ^= (tail[1] << 8);
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case 1:
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k ^= tail[0];
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k *= 0xcc9e2d51;
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k = (k << 15) | (k >> (32 - 15));
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k *= 0x1b873593;
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h ^= k;
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}
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h ^= len;
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h ^= (h >> 16);
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h *= 0x85ebca6b;
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h ^= (h >> 13);
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h *= 0xc2b2ae35;
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h ^= (h >> 16);
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return h;
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}
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//////////////////////////////////hash 函数测试///////////////////////////
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static ERL_NIF_TERM hash1(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
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ErlNifBinary Value;
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if (!enif_term_to_binary(env, argv[0], &Value))
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return enif_make_badarg(env);
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uint32_t Salt;
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if (!enif_get_uint(env, argv[1], &Salt)) {
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return enif_make_badarg(env);
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}
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Salt = fnv_hash(Value.data, Value.size, Salt);
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enif_release_binary(&Value);
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return ok;
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};
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static ERL_NIF_TERM hash2(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
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ErlNifUInt64 Salt;
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if (!enif_get_uint64(env, argv[1], &Salt))
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return enif_make_badarg(env);
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ErlNifBinary Value;
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if (!enif_term_to_binary(env, argv[0], &Value))
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return enif_make_badarg(env);
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enif_release_binary(&Value);
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Salt = enif_hash(ERL_NIF_INTERNAL_HASH, argv[1], 2423432432);
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return ok;
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};
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static ERL_NIF_TERM hash3(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
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ErlNifUInt64 Salt;
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if (!enif_get_uint64(env, argv[1], &Salt))
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return enif_make_badarg(env);
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ErlNifBinary Value;
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if (!enif_term_to_binary(env, argv[0], &Value))
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return enif_make_badarg(env);
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Salt = murmurhash(Value.data, Value.size, 0);
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enif_release_binary(&Value);
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return ok;
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};
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static uint8_t compareChar1(const unsigned char *src, const unsigned char *dst, size_t Size) {
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// int j = 0;
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// unsigned char *tsrc, *tdst;
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// tsrc = src;
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// tdst = dst;
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// for(j = 0; j <= Size; j++)
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// {
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// enif_fprintf(stdout, "IMY************get9999111 src %d dst %d \n", *tsrc, *tdst);
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// tsrc++;
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// tdst++;
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// }
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uint8_t i = 0;
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while (i < Size-1 && (*src == *dst)) {
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// enif_fprintf(stdout, "IMY************get99992222 %d %d \n", *src, *dst);
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src++;
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dst++;
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i++;
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}
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//enif_fprintf(stdout, "IMY************get9999while end %d %d \n", *src, *dst);
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if (*src != *dst) {
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//enif_fprintf(stdout, "IMY************get99993333 %d %d \n", *src, *dst);
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return 1;
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} else {
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//enif_fprintf(stdout, "IMY************get99995555 %d %d \n", *src, *dst);
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return 0;
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}
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}
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static uint8_t compareChar2(const unsigned char *src, const unsigned char *dst, size_t Size) {
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const uint32_t *intSrc = NULL;
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const uint32_t *intDst = NULL;
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const uint8_t *tailSrc = NULL; // tail - last 8 bytes
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const uint8_t *tailDst = NULL; // tail - last 8 bytes
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int l = Size / 4; // chunk length
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intSrc = (const uint32_t *) src; // body
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intDst = (const uint32_t *) dst; // body
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tailSrc = (const uint8_t *) (src + l * 4); // last 8 byte chunk of `key'
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tailDst = (const uint8_t *) (dst + l * 4); // last 8 byte chunk of `key'
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// for each 4 byte chunk of `key'
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int i = 0;
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for (i = 0; i < l; i++) {
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if (intSrc[i] != intDst[i])
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return 1;
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}
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// remainder
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switch (Size & 3) {
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case 3:
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if (tailSrc[0] != tailDst[0] || tailSrc[1] != tailDst[1] || tailSrc[2] != tailDst[2]) {
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return 1;
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}
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break;
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case 2:
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if (tailSrc[0] != tailDst[0] || tailSrc[1] != tailDst[1]) {
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return 1;
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}
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break;
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case 1:
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if (tailSrc[0] != tailDst[0]) {
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return 1;
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}
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break;
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}
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return 0;
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}
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static ERL_NIF_TERM compareBin1(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
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ErlNifBinary src, dst;
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if (!(enif_inspect_binary(env, argv[0], &src) && enif_inspect_binary(env, argv[1], &dst)))
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return enif_make_badarg(env);
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if (src.size != dst.size) {
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return enif_make_int(env, 1);
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}
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int Ret = compareChar1(src.data, dst.data, src.size);
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return enif_make_int(env, Ret);
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}
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static ERL_NIF_TERM compareBin2(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
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ErlNifBinary src, dst;
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if (!(enif_inspect_binary(env, argv[0], &src) && enif_inspect_binary(env, argv[1], &dst)))
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return enif_make_badarg(env);
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if (src.size != dst.size) {
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return enif_make_int(env, 1);
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}
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int Ret = compareChar2(src.data, dst.data, src.size);
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return enif_make_int(env, Ret);
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}
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/////////////////////////////////////////////////////////////////////
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static int load(ErlNifEnv *env, void **priv, ERL_NIF_TERM load_info) {
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ErlNifResourceFlags flags = ERL_NIF_RT_CREATE | ERL_NIF_RT_TAKEOVER;
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ResType = enif_open_resource_type(env, NULL, "_nifHashb_", NULL, flags, NULL);
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if (NULL == ResType)
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return -1;
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undefined = enif_make_atom(env, "undefined");
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ok = enif_make_atom(env, "ok");
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return 0;
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}
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static ERL_NIF_TERM new(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
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hashb *ResPtr = (hashb *) enif_alloc_resource(ResType, sizeof(hashb));
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ResPtr->keySize = 0;
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ResPtr->bblSize_1 = BBLSIZE_1;
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ResPtr->bblSize_2 = BBLSIZE_2;
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ResPtr->arrayPtr = enif_alloc(sizeof(bbl *) * BBLSIZE_1);
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int i, j;
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bbl NullBbl;
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NullBbl.head = NULL;
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for (i = 0; i < BBLSIZE_1; i++) {
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ResPtr->arrayPtr[i] = enif_alloc(sizeof(bbl) * BBLSIZE_2);
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for (j = 0; j < BBLSIZE_2; j++) {
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ResPtr->arrayPtr[i][j] = NullBbl;
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}
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}
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ERL_NIF_TERM Res = enif_make_resource(env, ResPtr);
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enif_release_resource(ResPtr);
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return Res;
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}
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static uint8_t compareChar(const unsigned char *src, const unsigned char *dst, size_t Size) {
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const uint32_t *intSrc = NULL;
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const uint32_t *intDst = NULL;
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const uint8_t *tailSrc = NULL; // tail - last 8 bytes
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const uint8_t *tailDst = NULL; // tail - last 8 bytes
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int l = Size / 4; // chunk length
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intSrc = (const uint32_t *) src; // body
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intDst = (const uint32_t *) dst; // body
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tailSrc = (const uint8_t *) (src + l * 4); // last 8 byte chunk of `key'
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tailDst = (const uint8_t *) (dst + l * 4); // last 8 byte chunk of `key'
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// for each 4 byte chunk of `key'
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int i = 0;
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for (i = 0; i < l; i++) {
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if (intSrc[i] != intDst[i])
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return 1;
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}
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// remainder
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switch (Size & 3) {
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case 3:
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if (tailSrc[0] != tailDst[0] || tailSrc[1] != tailDst[1] || tailSrc[2] != tailDst[2]) {
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return 1;
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}
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break;
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case 2:
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if (tailSrc[0] != tailDst[0] || tailSrc[1] != tailDst[1]) {
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return 1;
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}
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break;
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case 1:
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if (tailSrc[0] != tailDst[0]) {
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return 1;
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}
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break;
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}
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return 0;
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}
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static uint8_t compareBin(ErlNifBinary src, ErlNifBinary dst) {
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if (src.size != dst.size) {
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//enif_fprintf(stdout, "IMY************get8888\n");
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return 1;
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}
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//enif_fprintf(stdout, "IMY************get8888111 %d \n", src.size);
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return compareChar(src.data, dst.data, src.size);
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}
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static ERL_NIF_TERM get(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
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hashb *ResPtr;
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if (!enif_get_resource(env, argv[0], ResType, (void **) &ResPtr)) {
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return enif_make_badarg(env);
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}
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//enif_fprintf(stdout, "IMY************get1111\n");
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ErlNifBinary getKey;
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if (!enif_term_to_binary(env, argv[1], &getKey))
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return enif_make_badarg(env);
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//enif_fprintf(stdout, "IMY************get2222\n");
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uint32_t BblIndex_1, BblIndex_2;
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BblIndex_1 = murmurhash(getKey.data, getKey.size, 131) % ResPtr->bblSize_1;
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BblIndex_2 = murmurhash(getKey.data, getKey.size, 16777619) % ResPtr->bblSize_2;
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//enif_fprintf(stdout, "IMY************get3333\n");
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if (NULL == ResPtr->arrayPtr[BblIndex_1][BblIndex_2].head) {
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//enif_fprintf(stdout, "IMY************get4444\n");
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enif_release_binary(&getKey);
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return undefined;
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} else {
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// enif_fprintf(stdout, "IMY************get55555\n");
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node *Head = ResPtr->arrayPtr[BblIndex_1][BblIndex_2].head;
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while (Head) {
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// enif_fprintf(stdout, "IMY************get7777\n");
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if (compareBin(getKey, Head->Key) == 0) {
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ERL_NIF_TERM Ret;
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enif_binary_to_term(env, Head->Value.data, Head->Value.size, &Ret, 0);
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//enif_fprintf(stdout, "IMY************get5555\n");
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enif_release_binary(&getKey);
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return Ret;
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}
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Head = Head->next;
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}
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//enif_fprintf(stdout, "IMY************get6666\n");
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enif_release_binary(&getKey);
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return undefined;
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}
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}
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static ERL_NIF_TERM put(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
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hashb *ResPtr;
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if (!enif_get_resource(env, argv[0], ResType, (void **) &ResPtr)) {
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return enif_make_badarg(env);
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}
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//enif_fprintf(stdout, "IMY************put111 \n");
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ErlNifBinary Key, Value;
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if (!enif_term_to_binary(env, argv[1], &Key))
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return enif_make_badarg(env);
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if (!enif_term_to_binary(env, argv[2], &Value))
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return enif_make_badarg(env);
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uint32_t BblIndex_1, BblIndex_2;
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BblIndex_1 = murmurhash(Key.data, Key.size, 131) % ResPtr->bblSize_1;
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BblIndex_2 = murmurhash(Key.data, Key.size, 16777619) % ResPtr->bblSize_2;
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//enif_fprintf(stdout, "IMY************put222 %d %d \n", BblIndex_1, BblIndex_2);
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//enif_fprintf(stdout, "IMY************put3333 \n");
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if (NULL == ResPtr->arrayPtr[BblIndex_1][BblIndex_2].head) {
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node *NewNode = enif_alloc(sizeof(node));
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NewNode->Key = Key;
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NewNode->Value = Value;
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NewNode->next = NULL;
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ResPtr->arrayPtr[BblIndex_1][BblIndex_2].head = NewNode;
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ResPtr->keySize = ResPtr->keySize + 1;
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//enif_fprintf(stdout, "IMY************put4444 \n");
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return ok;
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} else {
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node *Head = ResPtr->arrayPtr[BblIndex_1][BblIndex_2].head;
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while (Head) {
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if (compareBin(Key, Head->Key) == 0) {
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//ERL_NIF_TERM Ret;
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ErlNifBinary OldValue = Head->Value;
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//enif_binary_to_term(env, OldValue.data, OldValue.size, &Ret, 0);
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Head->Value = Value;
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enif_release_binary(&OldValue);
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enif_release_binary(&Key);
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//enif_fprintf(stdout, "IMY************put55555 \n");
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//return Ret;
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return ok;
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}
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Head = Head->next;
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}
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node *NewNode = enif_alloc(sizeof(node));
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NewNode->Key = Key;
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NewNode->Value = Value;
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NewNode->next = ResPtr->arrayPtr[BblIndex_1][BblIndex_2].head;
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ResPtr->arrayPtr[BblIndex_1][BblIndex_2].head = NewNode;
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ResPtr->keySize = ResPtr->keySize + 1;
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//enif_fprintf(stdout, "IMY************put6666\n");
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return ok;
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}
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}
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/////////////////////////////////////////////////////////////////////////
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static ErlNifFunc nifFuns[] = {
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{"new", 0, new},
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{"get", 2, get},
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{"put", 3, put},
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{"hash1", 2, hash1},
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{"hash2", 2, hash2},
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{"hash3", 2, hash3},
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{"compareBin1", 2, compareBin1},
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{"compareBin2", 2, compareBin2},
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};
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ERL_NIF_INIT(nifHashb, nifFuns,
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&load, NULL, NULL, NULL)
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