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gdbm.h
/* gdbm.h - The include file for dbm users. -*- c -*- */ /* This file is part of GDBM, the GNU data base manager, by Philip A. Nelson. Copyright (C) 1990-1991, 1993, 2011, 2016-2018 Free Software Foundation, Inc. GDBM is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GDBM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GDBM. If not, see <http://www.gnu.org/licenses/>. You may contact the author by: e-mail: phil@cs.wwu.edu us-mail: Philip A. Nelson Computer Science Department Western Washington University Bellingham, WA 98226 *************************************************************************/ /* Protection for multiple includes. */ #ifndef _GDBM_H_ # define _GDBM_H_ # include <stdio.h> /* GDBM C++ support */ # if defined(__cplusplus) || defined(c_plusplus) extern "C" { # endif /* Parameters to gdbm_open for READERS, WRITERS, and WRITERS who can create the database. */ # define GDBM_READER 0 /* A reader. */ # define GDBM_WRITER 1 /* A writer. */ # define GDBM_WRCREAT 2 /* A writer. Create the db if needed. */ # define GDBM_NEWDB 3 /* A writer. Always create a new db. */ # define GDBM_OPENMASK 7 /* Mask for the above. */ # define GDBM_FAST 0x010 /* Write fast! => No fsyncs. OBSOLETE. */ # define GDBM_SYNC 0x020 /* Sync operations to the disk. */ # define GDBM_NOLOCK 0x040 /* Don't do file locking operations. */ # define GDBM_NOMMAP 0x080 /* Don't use mmap(). */ # define GDBM_CLOEXEC 0x100 /* Close the underlying fd on exec(3) */ # define GDBM_BSEXACT 0x200 /* Don't adjust block_size. Bail out with GDBM_BLOCK_SIZE_ERROR error if unable to set it. */ # define GDBM_CLOERROR 0x400 /* Only for gdbm_fd_open: close fd on error. */ /* Parameters to gdbm_store for simple insertion or replacement in the case that the key is already in the database. */ # define GDBM_INSERT 0 /* Never replace old data with new. */ # define GDBM_REPLACE 1 /* Always replace old data with new. */ /* Parameters to gdbm_setopt, specifing the type of operation to perform. */ # define GDBM_SETCACHESIZE 1 /* Set the cache size. */ # define GDBM_FASTMODE 2 /* Toggle fast mode. OBSOLETE. */ # define GDBM_SETSYNCMODE 3 /* Turn on or off sync operations. */ # define GDBM_SETCENTFREE 4 /* Keep all free blocks in the header. */ # define GDBM_SETCOALESCEBLKS 5 /* Attempt to coalesce free blocks. */ # define GDBM_SETMAXMAPSIZE 6 /* Set maximum mapped memory size */ # define GDBM_SETMMAP 7 /* Toggle mmap mode */ /* Compatibility defines: */ # define GDBM_CACHESIZE GDBM_SETCACHESIZE # define GDBM_SYNCMODE GDBM_SETSYNCMODE # define GDBM_CENTFREE GDBM_SETCENTFREE # define GDBM_COALESCEBLKS GDBM_SETCOALESCEBLKS # define GDBM_GETFLAGS 8 /* Get gdbm_open flags */ # define GDBM_GETMMAP 9 /* Get mmap status */ # define GDBM_GETCACHESIZE 10 /* Get current cache side */ # define GDBM_GETSYNCMODE 11 /* Get synch mode */ # define GDBM_GETCENTFREE 12 /* Get "centfree" status */ # define GDBM_GETCOALESCEBLKS 13 /* Get free block coalesce status */ # define GDBM_GETMAXMAPSIZE 14 /* Get maximum mapped memory size */ # define GDBM_GETDBNAME 15 /* Return database file name */ # define GDBM_GETBLOCKSIZE 16 /* Return block size */ typedef unsigned long long int gdbm_count_t; /* The data and key structure. */ typedef struct { char *dptr; int dsize; } datum; /* A pointer to the GDBM file. */ typedef struct gdbm_file_info *GDBM_FILE; /* External variable, the gdbm build release string. */ extern const char *gdbm_version; # define GDBM_VERSION_MAJOR 1 # define GDBM_VERSION_MINOR 18 # define GDBM_VERSION_PATCH 0 extern int const gdbm_version_number[3]; /* GDBM external functions. */ extern GDBM_FILE gdbm_fd_open (int fd, const char *file_name, int block_size, int flags, void (*fatal_func) (const char *)); extern GDBM_FILE gdbm_open (const char *, int, int, int, void (*)(const char *)); extern int gdbm_close (GDBM_FILE); extern int gdbm_store (GDBM_FILE, datum, datum, int); extern datum gdbm_fetch (GDBM_FILE, datum); extern int gdbm_delete (GDBM_FILE, datum); extern datum gdbm_firstkey (GDBM_FILE); extern datum gdbm_nextkey (GDBM_FILE, datum); extern int gdbm_reorganize (GDBM_FILE); extern int gdbm_sync (GDBM_FILE); extern int gdbm_exists (GDBM_FILE, datum); extern int gdbm_setopt (GDBM_FILE, int, void *, int); extern int gdbm_fdesc (GDBM_FILE); extern int gdbm_export (GDBM_FILE, const char *, int, int); extern int gdbm_export_to_file (GDBM_FILE dbf, FILE *fp); extern int gdbm_import (GDBM_FILE, const char *, int); extern int gdbm_import_from_file (GDBM_FILE dbf, FILE *fp, int flag); extern int gdbm_count (GDBM_FILE dbf, gdbm_count_t *pcount); typedef struct gdbm_recovery_s { /* Input members. These are initialized before call to gdbm_recover. The flags argument specifies which of them are initialized. */ void (*errfun) (void *data, char const *fmt, ...); void *data; size_t max_failed_keys; size_t max_failed_buckets; size_t max_failures; /* Output members. The gdbm_recover function fills these before returning. */ size_t recovered_keys; size_t recovered_buckets; size_t failed_keys; size_t failed_buckets; size_t duplicate_keys; char *backup_name; } gdbm_recovery; #define GDBM_RCVR_DEFAULT 0x00 /* Default settings */ #define GDBM_RCVR_ERRFUN 0x01 /* errfun is initialized */ #define GDBM_RCVR_MAX_FAILED_KEYS 0x02 /* max_failed_keys is initialized */ #define GDBM_RCVR_MAX_FAILED_BUCKETS 0x04 /* max_failed_buckets is initialized */ #define GDBM_RCVR_MAX_FAILURES 0x08 /* max_failures is initialized */ #define GDBM_RCVR_BACKUP 0x10 /* Keep backup copy of the original database on success */ #define GDBM_RCVR_FORCE 0x20 /* Force recovery by skipping the check pass */ extern int gdbm_recover (GDBM_FILE dbf, gdbm_recovery *rcvr, int flags); #define GDBM_DUMP_FMT_BINARY 0 #define GDBM_DUMP_FMT_ASCII 1 #define GDBM_META_MASK_MODE 0x01 #define GDBM_META_MASK_OWNER 0x02 extern int gdbm_dump (GDBM_FILE, const char *, int fmt, int open_flags, int mode); extern int gdbm_dump_to_file (GDBM_FILE, FILE *, int fmt); extern int gdbm_load (GDBM_FILE *, const char *, int replace, int meta_flags, unsigned long *line); extern int gdbm_load_from_file (GDBM_FILE *, FILE *, int replace, int meta_flags, unsigned long *line); extern int gdbm_copy_meta (GDBM_FILE dst, GDBM_FILE src); # define GDBM_NO_ERROR 0 # define GDBM_MALLOC_ERROR 1 # define GDBM_BLOCK_SIZE_ERROR 2 # define GDBM_FILE_OPEN_ERROR 3 # define GDBM_FILE_WRITE_ERROR 4 # define GDBM_FILE_SEEK_ERROR 5 # define GDBM_FILE_READ_ERROR 6 # define GDBM_BAD_MAGIC_NUMBER 7 # define GDBM_EMPTY_DATABASE 8 # define GDBM_CANT_BE_READER 9 # define GDBM_CANT_BE_WRITER 10 # define GDBM_READER_CANT_DELETE 11 # define GDBM_READER_CANT_STORE 12 # define GDBM_READER_CANT_REORGANIZE 13 # define GDBM_UNKNOWN_ERROR 14 # define GDBM_ITEM_NOT_FOUND 15 # define GDBM_REORGANIZE_FAILED 16 # define GDBM_CANNOT_REPLACE 17 # define GDBM_ILLEGAL_DATA 18 # define GDBM_OPT_ALREADY_SET 19 # define GDBM_OPT_ILLEGAL 20 # define GDBM_BYTE_SWAPPED 21 # define GDBM_BAD_FILE_OFFSET 22 # define GDBM_BAD_OPEN_FLAGS 23 # define GDBM_FILE_STAT_ERROR 24 # define GDBM_FILE_EOF 25 # define GDBM_NO_DBNAME 26 # define GDBM_ERR_FILE_OWNER 27 # define GDBM_ERR_FILE_MODE 28 # define GDBM_NEED_RECOVERY 29 # define GDBM_BACKUP_FAILED 30 # define GDBM_DIR_OVERFLOW 31 # define GDBM_BAD_BUCKET 32 # define GDBM_BAD_HEADER 33 # define GDBM_BAD_AVAIL 34 # define GDBM_BAD_HASH_TABLE 35 # define GDBM_BAD_DIR_ENTRY 36 # define GDBM_FILE_CLOSE_ERROR 37 # define GDBM_FILE_SYNC_ERROR 38 # define GDBM_FILE_TRUNCATE_ERROR 39 # define _GDBM_MIN_ERRNO 0 # define _GDBM_MAX_ERRNO GDBM_FILE_TRUNCATE_ERROR /* This one was never used and will be removed in the future */ # define GDBM_UNKNOWN_UPDATE GDBM_UNKNOWN_ERROR typedef int gdbm_error; extern int *gdbm_errno_location (void); #define gdbm_errno (*gdbm_errno_location ()) extern const char * const gdbm_errlist[]; extern int const gdbm_syserr[]; extern gdbm_error gdbm_last_errno (GDBM_FILE dbf); extern int gdbm_last_syserr (GDBM_FILE dbf); extern void gdbm_set_errno (GDBM_FILE dbf, gdbm_error ec, int fatal); extern void gdbm_clear_error (GDBM_FILE dbf); extern int gdbm_needs_recovery (GDBM_FILE dbf); extern int gdbm_check_syserr (gdbm_error n); /* extra prototypes */ extern const char *gdbm_strerror (gdbm_error); extern const char *gdbm_db_strerror (GDBM_FILE dbf); extern int gdbm_version_cmp (int const a[], int const b[]); #if 0 # define GDBM_DEBUG_ENABLE 1 typedef void (*gdbm_debug_printer_t) (char const *, ...); extern gdbm_debug_printer_t gdbm_debug_printer; extern int gdbm_debug_flags; # define GDBM_DEBUG_ERR 0x00000001 # define GDBM_DEBUG_OPEN 0x00000002 # define GDBM_DEBUG_READ 0x00000004 # define GDBM_DEBUG_STORE 0x00000008 # define GDBM_DEBUG_LOOKUP 0x00000010 # define GDBM_DEBUG_ALL 0xffffffff extern int gdbm_debug_token (char const *tok); extern void gdbm_debug_parse_state (int (*f) (void *, int, char const *), void *d); extern void gdbm_debug_datum (datum dat, char const *pfx); #endif # if defined(__cplusplus) || defined(c_plusplus) } # endif #endif