1/* ----------------------------------------------------------------------- *
2 *
3 * Copyright 1996-2017 The NASM Authors - All Rights Reserved
4 * See the file AUTHORS included with the NASM distribution for
5 * the specific copyright holders.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following
9 * conditions are met:
10 *
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials provided
16 * with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
19 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
20 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
29 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
30 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 * ----------------------------------------------------------------------- */
33
34#ifndef NASMLIB_FILE_H
35#define NASMLIB_FILE_H
36
37#include "compiler.h"
38#include "nasmlib.h"
39#include "error.h"
40
41#include <errno.h>
42
43#ifdef HAVE_FCNTL_H
44# include <fcntl.h>
45#endif
46#ifdef HAVE_SYS_TYPES_H
47# include <sys/types.h>
48#endif
49#ifdef HAVE_SYS_STAT_H
50# include <sys/stat.h>
51#endif
52#ifdef HAVE_IO_H
53# include <io.h>
54#endif
55#ifdef HAVE_UNISTD_H
56# include <unistd.h>
57#endif
58#ifdef HAVE_SYS_MMAN_H
59# include <sys/mman.h>
60#endif
61
62#if !defined(HAVE_ACCESS) && defined(HAVE__ACCESS)
63# define HAVE_ACCESS 1
64# define access _access
65#endif
66#ifndef R_OK
67# define R_OK 4 /* Classic Unix constant, same on Windows */
68#endif
69
70/* Can we adjust the file size without actually writing all the bytes? */
71#ifdef HAVE__CHSIZE_S
72# define nasm_ftruncate(fd,size) _chsize_s(fd,size)
73#elif defined(HAVE__CHSIZE)
74# define nasm_ftruncate(fd,size) _chsize(fd,size)
75#elif defined(HAVE_FTRUNCATE)
76# define nasm_ftruncate(fd,size) ftruncate(fd,size)
77#endif
78
79/*
80 * On Win32/64, stat has a 32-bit file size but _stati64 has a 64-bit file
81 * size. Things get complicated because some of these may be macros,
82 * which autoconf won't pick up on as the standard autoconf tests do
83 * #undef.
84 */
85#ifdef _stati64
86# define HAVE_STRUCT__STATI64 1
87# define HAVE__STATI64 1
88#endif
89#ifdef _fstati64
90# define HAVE__FSTATI64 1
91#endif
92
93#ifdef HAVE_STRUCT__STATI64
94typedef struct _stati64 nasm_struct_stat;
95# ifdef HAVE__STATI64
96# define nasm_stat _stati64
97# endif
98# ifdef HAVE__FSTATI64
99# define nasm_fstat _fstati64
100# endif
101#elif defined(HAVE_STRUCT_STAT)
102typedef struct stat nasm_struct_stat;
103# ifdef HAVE_STAT
104# define nasm_stat stat
105# endif
106# ifdef HAVE_FSTAT
107# define nasm_fstat fstat
108# endif
109#endif
110
111#ifndef HAVE_FILENO
112# ifdef fileno /* autoconf doesn't always pick up macros */
113# define HAVE_FILENO 1
114# elif defined(HAVE__FILENO)
115# define HAVE_FILENO 1
116# define fileno _fileno
117# endif
118#endif
119
120/* These functions are utterly useless without fileno() */
121#ifndef HAVE_FILENO
122# undef nasm_fstat
123# undef nasm_ftruncate
124# undef HAVE_MMAP
125# undef HAVE__FILELENGTHI64
126#endif
127
128#endif /* NASMLIB_FILE_H */
129