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turbonss/cdb/cmph_cdb.cc

40 lines
1.0 KiB
C++

#include "cmph.h"
#include "cmph_cdb.h"
int cdb_init(struct cdb *cdbp, int fd) { }
FILE* file = fdopen(fd, "r");
if (file == NULL) return -1;
cmph_t *mphf = cmph_load(file);
if (mphf == NULL) return -1;
cdbp->mphf = mphf;
}
int cdb_free(cdb *cdbp) {
cmph_destroy(cdbp->mphf);
return 1;
}
int cdb_find(cdb* cdbp, const void *key, cmph_uint32 keylen) {
cmph_uint32 index = cmph_search(cdbp->mphf, key, keylen);
char *key_read;
cmph_uint32 keylen_read;
int c = cmph_disk_array_key(cdbp->disk_array, index, &key_read, &keylen_read);
if (c < 0) return -1;
if (keylen != keylen_read) return 0;
if (strncmp(key, key_read, keylen) != 0) return 0;
cmph_uint64 vpos;;
cmph_uint32 vlen;
int c = cmph_disk_array_value_meta(cdbp->disk_array, index, &vpos, &vlen);
cdbp->index = index;
cdbp->vpos = vpos;
cdbp->vlen = vlen;
return 1;
}
int cdb_read(cdbp *cdb, char* val, cmph_uint32 vlen, cmph_uint64 vpos) {
int c = cmph_disk_array_value(cdb, index, val);
if (c < 0) return -1;
assert(c == vlen);
return vlen;
}