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94 lines
2.9 KiB
94 lines
2.9 KiB
/* $Id: cdb.h 106 2003-12-12 17:36:49Z werner $ |
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* public cdb include file |
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* |
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* This file is a part of tinycdb package by Michael Tokarev, mjt@corpit.ru. |
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* Public domain. |
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* |
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* Taken from tinycdb-0.73. By Werner Koch <wk@gnupg.org> 2003-12-12. |
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*/ |
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#ifndef TINYCDB_VERSION |
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#define TINYCDB_VERSION 0.73 |
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typedef unsigned int cdbi_t; /*XXX should be at least 32 bits long */ |
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/* common routines */ |
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cdbi_t cdb_hash(const void *buf, cdbi_t len); |
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cdbi_t cdb_unpack(const unsigned char buf[4]); |
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void cdb_pack(cdbi_t num, unsigned char buf[4]); |
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struct cdb { |
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int cdb_fd; /* file descriptor */ |
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/* private members */ |
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#ifdef HAVE_W32_SYSTEM |
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void *cdb_mapping; /* Mapping handle. */ |
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#endif |
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cdbi_t cdb_fsize; /* datafile size */ |
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const unsigned char *cdb_mem; /* mmap'ed file memory */ |
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cdbi_t cdb_vpos, cdb_vlen; /* found data */ |
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cdbi_t cdb_kpos, cdb_klen; /* found key (only set if cdb_findinit |
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was called with KEY set to NULL). */ |
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}; |
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#define cdb_datapos(c) ((c)->cdb_vpos) |
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#define cdb_datalen(c) ((c)->cdb_vlen) |
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#define cdb_keypos(c) ((c)->cdb_kpos) |
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#define cdb_keylen(c) ((c)->cdb_klen) |
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#define cdb_fileno(c) ((c)->cdb_fd) |
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int cdb_init(struct cdb *cdbp, int fd); |
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void cdb_free(struct cdb *cdbp); |
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int cdb_read(const struct cdb *cdbp, |
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void *buf, unsigned len, cdbi_t pos); |
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int cdb_find(struct cdb *cdbp, const void *key, unsigned klen); |
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struct cdb_find { |
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struct cdb *cdb_cdbp; |
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cdbi_t cdb_hval; |
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const unsigned char *cdb_htp, *cdb_htab, *cdb_htend; |
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cdbi_t cdb_httodo; |
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const void *cdb_key; |
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cdbi_t cdb_klen; |
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}; |
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int cdb_findinit(struct cdb_find *cdbfp, struct cdb *cdbp, |
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const void *key, cdbi_t klen); |
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int cdb_findnext(struct cdb_find *cdbfp); |
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/* old simple interface */ |
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/* open file using standard routine, then: */ |
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int cdb_seek(int fd, const void *key, unsigned klen, cdbi_t *dlenp); |
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int cdb_bread(int fd, void *buf, int len); |
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/* cdb_make */ |
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struct cdb_make { |
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int cdb_fd; /* file descriptor */ |
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/* private */ |
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cdbi_t cdb_dpos; /* data position so far */ |
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cdbi_t cdb_rcnt; /* record count so far */ |
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char cdb_buf[4096]; /* write buffer */ |
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char *cdb_bpos; /* current buf position */ |
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struct cdb_rl *cdb_rec[256]; /* list of arrays of record infos */ |
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}; |
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int cdb_make_start(struct cdb_make *cdbmp, int fd); |
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int cdb_make_add(struct cdb_make *cdbmp, |
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const void *key, cdbi_t klen, |
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const void *val, cdbi_t vlen); |
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int cdb_make_exists(struct cdb_make *cdbmp, |
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const void *key, cdbi_t klen); |
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int cdb_make_put(struct cdb_make *cdbmp, |
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const void *key, cdbi_t klen, |
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const void *val, cdbi_t vlen, |
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int flag); |
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#define CDB_PUT_ADD 0 /* add unconditionally, like cdb_make_add() */ |
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#define CDB_PUT_REPLACE 1 /* replace: do not place to index OLD record */ |
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#define CDB_PUT_INSERT 2 /* add only if not already exists */ |
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#define CDB_PUT_WARN 3 /* add unconditionally but ret. 1 if exists */ |
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int cdb_make_finish(struct cdb_make *cdbmp); |
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#endif /* include guard */
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