Mercurial > hg > octave-nkf > gnulib-hg
annotate lib/freading.c @ 16040:b8acd8099b25
New module 'fmaf'.
* lib/math.in.h (fmaf): New declaration.
* lib/fmaf.c: New file.
* m4/fmaf.m4: New file.
* m4/math_h.m4 (gl_MATH_H): Test whethern fmaf is declared.
(gl_MATH_H_DEFAULTS): Initialize GNULIB_FMAF, HAVE_FMAF, REPLACE_FMAF.
* modules/math (Makefile.am): Substitute GNULIB_FMAF, HAVE_FMAF,
REPLACE_FMAF.
* modules/fmaf: New file.
* doc/posix-functions/fmaf.texi: Mention the new module and the various
bugs.
author | Bruno Haible <bruno@clisp.org> |
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date | Mon, 17 Oct 2011 23:51:21 +0200 |
parents | 20a2699b8a90 |
children | 8250f2777afc |
rev | line source |
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8720 | 1 /* Retrieve information about a FILE stream. |
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2 Copyright (C) 2007-2011 Free Software Foundation, Inc. |
8720 | 3 |
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4 This program is free software: you can redistribute it and/or modify |
8720 | 5 it under the terms of the GNU General Public License as published by |
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6 the Free Software Foundation; either version 3 of the License, or |
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7 (at your option) any later version. |
8720 | 8 |
9 This program 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 | |
12 GNU General Public License for more details. | |
13 | |
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14 You should have received a copy of the GNU General Public License |
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15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
8720 | 16 |
17 #include <config.h> | |
18 | |
19 /* Specification. */ | |
20 #include "freading.h" | |
21 | |
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22 #include "stdio-impl.h" |
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23 |
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24 /* Don't use glibc's __freading function in glibc < 2.7, see |
8720 | 25 <http://sourceware.org/bugzilla/show_bug.cgi?id=4359> */ |
13885 | 26 #if !(HAVE___FREADING && (!defined __GLIBC__ || defined __UCLIBC__ || __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))) |
8720 | 27 |
28 bool | |
29 freading (FILE *fp) | |
30 { | |
31 /* Most systems provide FILE as a struct and the necessary bitmask in | |
32 <stdio.h>, because they need it for implementing getc() and putc() as | |
33 fast macros. */ | |
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34 # if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ |
8720 | 35 return ((fp->_flags & _IO_NO_WRITES) != 0 |
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36 || ((fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) == 0 |
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37 && fp->_IO_read_base != NULL)); |
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38 # elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, MacOS X, Cygwin */ |
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39 return (fp_->_flags & __SRD) != 0; |
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40 # elif defined __EMX__ /* emx+gcc */ |
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41 return (fp->_flags & _IOREAD) != 0; |
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42 # elif defined __minix /* Minix */ |
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43 return (fp->_flags & _IOREADING) != 0; |
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44 # elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw, NonStop Kernel */ |
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45 # if defined __sun /* Solaris */ |
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46 return (fp->_flag & _IOREAD) != 0 && (fp->_flag & _IOWRT) == 0; |
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47 # else |
8720 | 48 return (fp->_flag & _IOREAD) != 0; |
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49 # endif |
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50 # elif defined __UCLIBC__ /* uClibc */ |
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51 return (fp->__modeflags & (__FLAG_READONLY | __FLAG_READING)) != 0; |
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52 # elif defined __QNX__ /* QNX */ |
9456 | 53 return ((fp->_Mode & 0x2 /* _MOPENW */) == 0 |
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54 || (fp->_Mode & 0x1000 /* _MREAD */) != 0); |
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55 # elif defined __MINT__ /* Atari FreeMiNT */ |
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56 if (!fp->__mode.__write) |
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57 return 1; |
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58 if (!fp->__mode.__read) |
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59 return 0; |
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60 # ifdef _IO_CURRENTLY_GETTING /* Flag added on 2009-02-28 */ |
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61 return (fp->__flags & _IO_CURRENTLY_GETTING) != 0; |
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62 # else |
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63 return (fp->__buffer < fp->__get_limit /*|| fp->__bufp == fp->__put_limit ??*/); |
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64 # endif |
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65 # else |
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66 # error "Please port gnulib freading.c to your platform!" |
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67 # endif |
8720 | 68 } |
69 | |
70 #endif |