777436c8cf
librefuse-based file systems.
These are especially useful for file systems which present virtual
directory hierarchies to the caller.
The routines build up and manage an array of virtual directory
entries, indexed upon full pathname within the file system. This is
analogous to the way refuse indexes its own entries. Routines are
available to add, delete, and find entries. Each entry can be one of
3 types - file ('f'), directory ('d') or symbolic link ('l'). Each
entry can also be associated with a target, which is a character
string allocated upon addition. This can be useful for virtual
directory entries of the symbolic link type.
The virtual directory entries can be traversed as an ordered list
(the entries are ordered alphabetically), or can be accessed by
directory component, using routines analogous to opendir(3), readdir(3),
and closedir(3).
89 lines
3.1 KiB
C
89 lines
3.1 KiB
C
/* $NetBSD: defs.h,v 1.1 2007/04/15 15:10:57 agc Exp $ */
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/*
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* Copyright (c) 1999-2005 Alistair Crooks. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef DEFS_H_
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#define DEFS_H_
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#include <sys/types.h>
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#include <sys/param.h>
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#ifdef HAVE_STDINT_H
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#include <stdint.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define NEWARRAY(type,ptr,size,where,action) do { \
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if ((ptr = (type *) calloc(sizeof(type), (unsigned)(size))) == NULL) { \
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(void) fprintf(stderr, "%s: can't allocate %lu bytes\n", \
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where, (unsigned long)(size * sizeof(type))); \
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action; \
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} \
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} while( /* CONSTCOND */ 0)
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#define RENEW(type,ptr,size,where,action) do { \
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type *_newptr; \
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if ((_newptr = (type *) realloc(ptr, sizeof(type) * (size))) == NULL) { \
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(void) fprintf(stderr, "%s: can't realloc %lu bytes\n", \
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where, (unsigned long)(size * sizeof(type))); \
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action; \
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} else { \
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ptr = _newptr; \
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} \
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} while( /* CONSTCOND */ 0)
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#define NEW(type, ptr, where, action) NEWARRAY(type, ptr, 1, where, action)
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#define FREE(ptr) (void) free(ptr)
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#define ALLOC(type, v, size, c, init, incr, where, action) do { \
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uint32_t _newsize = size; \
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if (size == 0) { \
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_newsize = init; \
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NEWARRAY(type, v, _newsize, where ": new", action); \
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} else if (c == size) { \
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_newsize = size + incr; \
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RENEW(type, v, _newsize, where ": renew", action); \
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} \
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size = _newsize; \
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} while( /* CONSTCOND */ 0)
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/* (void) memset(&v[size], 0x0, sizeof(type) * incr); \*/
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#define DEFINE_ARRAY(name, type) \
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typedef struct name { \
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uint32_t c; \
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uint32_t size; \
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type *v; \
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} name
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#endif /* !DEFS_H_ */
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