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gdbm
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gdbm.h
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/* 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 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_ /* 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) */ /* 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 */ /* The data and key structure. */ typedef struct { char *dptr; int dsize; } datum; /* The file information header. This is good enough for most applications. */ 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 10 # define GDBM_VERSION_PATCH 0 extern int const gdbm_version_number[3]; /* GDBM external functions. */ extern GDBM_FILE gdbm_open (const char *, int, int, int, void (*)(const char *)); extern void 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 void 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_import (GDBM_FILE, const char *, int); # 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_UPDATE 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_MIN_ERRNO 0 # define _GDBM_MAX_ERRNO GDBM_FILE_EOF typedef int gdbm_error; /* For compatibilities sake. */ extern gdbm_error gdbm_errno; extern const char * const gdbm_errlist[]; /* extra prototypes */ extern const char *gdbm_strerror (gdbm_error); extern int gdbm_version_cmp (int const a[], int const b[]); # if defined(__cplusplus) || defined(c_plusplus) } # endif #endif