nasmlib/file.h

   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
  94 typedef 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)
 102 typedef 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 */