Sort sysdeps/powerpc/fpu/libm-test-ulps
[glibc.git] / libio / iofopen.c
blob8edd32ebd64f17177abaff8409fb15b45f74f216
1 /* Copyright (C) 1993-2012 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>.
18 As a special exception, if you link the code in this file with
19 files compiled with a GNU compiler to produce an executable,
20 that does not cause the resulting executable to be covered by
21 the GNU Lesser General Public License. This exception does not
22 however invalidate any other reasons why the executable file
23 might be covered by the GNU Lesser General Public License.
24 This exception applies to code released by its copyright holders
25 in files containing the exception. */
27 #include "libioP.h"
28 #include <stdlib.h>
29 #include <stddef.h>
30 #ifdef _LIBC
31 # include <shlib-compat.h>
32 #else
33 # define _IO_new_fopen fopen
34 #endif
36 _IO_FILE *
37 __fopen_maybe_mmap (fp)
38 _IO_FILE *fp;
40 #ifdef _G_HAVE_MMAP
41 if ((fp->_flags2 & _IO_FLAGS2_MMAP) && (fp->_flags & _IO_NO_WRITES))
43 /* Since this is read-only, we might be able to mmap the contents
44 directly. We delay the decision until the first read attempt by
45 giving it a jump table containing functions that choose mmap or
46 vanilla file operations and reset the jump table accordingly. */
48 if (fp->_mode <= 0)
49 _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps_maybe_mmap;
50 else
51 _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_wfile_jumps_maybe_mmap;
52 fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_maybe_mmap;
54 #endif
55 return fp;
59 _IO_FILE *
60 __fopen_internal (filename, mode, is32)
61 const char *filename;
62 const char *mode;
63 int is32;
65 struct locked_FILE
67 struct _IO_FILE_plus fp;
68 #ifdef _IO_MTSAFE_IO
69 _IO_lock_t lock;
70 #endif
71 struct _IO_wide_data wd;
72 } *new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE));
74 if (new_f == NULL)
75 return NULL;
76 #ifdef _IO_MTSAFE_IO
77 new_f->fp.file._lock = &new_f->lock;
78 #endif
79 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
80 _IO_no_init (&new_f->fp.file, 0, 0, &new_f->wd, &_IO_wfile_jumps);
81 #else
82 _IO_no_init (&new_f->fp.file, 1, 0, NULL, NULL);
83 #endif
84 _IO_JUMPS (&new_f->fp) = &_IO_file_jumps;
85 _IO_file_init (&new_f->fp);
86 #if !_IO_UNIFIED_JUMPTABLES
87 new_f->fp.vtable = NULL;
88 #endif
89 if (_IO_file_fopen ((_IO_FILE *) new_f, filename, mode, is32) != NULL)
90 return __fopen_maybe_mmap (&new_f->fp.file);
92 _IO_un_link (&new_f->fp);
93 free (new_f);
94 return NULL;
97 _IO_FILE *
98 _IO_new_fopen (filename, mode)
99 const char *filename;
100 const char *mode;
102 return __fopen_internal (filename, mode, 1);
105 #ifdef _LIBC
106 strong_alias (_IO_new_fopen, __new_fopen)
107 versioned_symbol (libc, _IO_new_fopen, _IO_fopen, GLIBC_2_1);
108 versioned_symbol (libc, __new_fopen, fopen, GLIBC_2_1);
109 #endif