| Absolute File Name: | /home/opencoverage/opencoverage/guest-scripts/coreutils/src/gnulib/lib/freadahead.c |
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| 1 | /* Retrieve information about a FILE stream. | - | ||||||
| 2 | Copyright (C) 2007-2018 Free Software Foundation, Inc. | - | ||||||
| 3 | - | |||||||
| 4 | This program is free software: you can redistribute it and/or modify | - | ||||||
| 5 | it under the terms of the GNU General Public License as published by | - | ||||||
| 6 | the Free Software Foundation; either version 3 of the License, or | - | ||||||
| 7 | (at your option) any later version. | - | ||||||
| 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 | - | |||||||
| 14 | You should have received a copy of the GNU General Public License | - | ||||||
| 15 | along with this program. If not, see <https://www.gnu.org/licenses/>. */ | - | ||||||
| 16 | - | |||||||
| 17 | #include <config.h> | - | ||||||
| 18 | - | |||||||
| 19 | /* Specification. */ | - | ||||||
| 20 | #include "freadahead.h" | - | ||||||
| 21 | - | |||||||
| 22 | #include <stdlib.h> | - | ||||||
| 23 | #include "stdio-impl.h" | - | ||||||
| 24 | - | |||||||
| 25 | #if defined __DragonFly__ | - | ||||||
| 26 | /* Defined in libc, but not declared in <stdio.h>. */ | - | ||||||
| 27 | extern size_t __sreadahead (FILE *); | - | ||||||
| 28 | #endif | - | ||||||
| 29 | - | |||||||
| 30 | size_t | - | ||||||
| 31 | freadahead (FILE *fp) | - | ||||||
| 32 | { | - | ||||||
| 33 | #if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ | - | ||||||
| 34 | if (fp->_IO_write_ptr > fp->_IO_write_base)
| 0-3074 | ||||||
| 35 | return 0; never executed: return 0; | 0 | ||||||
| 36 | return (fp->_IO_read_end - fp->_IO_read_ptr) executed 3074 times by 6 tests: return (fp->_IO_read_end - fp->_IO_read_ptr) + (fp->_flags & 0x100 ? fp->_IO_save_end - fp->_IO_save_base : 0);Executed by:
| 3074 | ||||||
| 37 | + (fp->_flags & _IO_IN_BACKUP ? fp->_IO_save_end - fp->_IO_save_base : executed 3074 times by 6 tests: return (fp->_IO_read_end - fp->_IO_read_ptr) + (fp->_flags & 0x100 ? fp->_IO_save_end - fp->_IO_save_base : 0);Executed by:
| 3074 | ||||||
| 38 | 0); executed 3074 times by 6 tests: return (fp->_IO_read_end - fp->_IO_read_ptr) + (fp->_flags & 0x100 ? fp->_IO_save_end - fp->_IO_save_base : 0);Executed by:
| 3074 | ||||||
| 39 | #elif defined __sferror || defined __DragonFly__ || defined __ANDROID__ | - | ||||||
| 40 | /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Minix 3, Android */ | - | ||||||
| 41 | if ((fp_->_flags & __SWR) != 0 || fp_->_r < 0) | - | ||||||
| 42 | return 0; | - | ||||||
| 43 | # if defined __DragonFly__ | - | ||||||
| 44 | return __sreadahead (fp); | - | ||||||
| 45 | # else | - | ||||||
| 46 | return fp_->_r | - | ||||||
| 47 | + (HASUB (fp) ? fp_->_ur : 0); | - | ||||||
| 48 | # endif | - | ||||||
| 49 | #elif defined __EMX__ /* emx+gcc */ | - | ||||||
| 50 | if ((fp->_flags & _IOWRT) != 0) | - | ||||||
| 51 | return 0; | - | ||||||
| 52 | /* Note: fp->_ungetc_count > 0 implies fp->_rcount <= 0, | - | ||||||
| 53 | fp->_ungetc_count = 0 implies fp->_rcount >= 0. */ | - | ||||||
| 54 | /* equivalent to | - | ||||||
| 55 | (fp->_ungetc_count == 0 ? fp->_rcount : fp->_ungetc_count - fp->_rcount) */ | - | ||||||
| 56 | return (fp->_rcount > 0 ? fp->_rcount : fp->_ungetc_count - fp->_rcount); | - | ||||||
| 57 | #elif defined __minix /* Minix */ | - | ||||||
| 58 | if ((fp_->_flags & _IOWRITING) != 0) | - | ||||||
| 59 | return 0; | - | ||||||
| 60 | return fp_->_count; | - | ||||||
| 61 | #elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw, MSVC, NonStop Kernel, OpenVMS */ | - | ||||||
| 62 | if ((fp_->_flag & _IOWRT) != 0) | - | ||||||
| 63 | return 0; | - | ||||||
| 64 | return fp_->_cnt; | - | ||||||
| 65 | #elif defined __UCLIBC__ /* uClibc */ | - | ||||||
| 66 | # ifdef __STDIO_BUFFERS | - | ||||||
| 67 | if (fp->__modeflags & __FLAG_WRITING) | - | ||||||
| 68 | return 0; | - | ||||||
| 69 | return (fp->__bufread - fp->__bufpos) | - | ||||||
| 70 | + (fp->__modeflags & __FLAG_UNGOT ? 1 : 0); | - | ||||||
| 71 | # else | - | ||||||
| 72 | return 0; | - | ||||||
| 73 | # endif | - | ||||||
| 74 | #elif defined __QNX__ /* QNX */ | - | ||||||
| 75 | if ((fp->_Mode & 0x2000 /* _MWRITE */) != 0) | - | ||||||
| 76 | return 0; | - | ||||||
| 77 | /* fp->_Buf <= fp->_Next <= fp->_Rend, | - | ||||||
| 78 | and fp->_Rend may be overridden by fp->_Rsave. */ | - | ||||||
| 79 | return ((fp->_Rsave ? fp->_Rsave : fp->_Rend) - fp->_Next) | - | ||||||
| 80 | + (fp->_Mode & 0x4000 /* _MBYTE */ | - | ||||||
| 81 | ? (fp->_Back + sizeof (fp->_Back)) - fp->_Rback | - | ||||||
| 82 | : 0); | - | ||||||
| 83 | #elif defined __MINT__ /* Atari FreeMiNT */ | - | ||||||
| 84 | if (!fp->__mode.__read) | - | ||||||
| 85 | return 0; | - | ||||||
| 86 | return (fp->__pushed_back | - | ||||||
| 87 | ? fp->__get_limit - fp->__pushback_bufp + 1 | - | ||||||
| 88 | : fp->__get_limit - fp->__bufp); | - | ||||||
| 89 | #elif defined EPLAN9 /* Plan9 */ | - | ||||||
| 90 | if (fp->state == 4 /* WR */ || fp->rp >= fp->wp) | - | ||||||
| 91 | return 0; | - | ||||||
| 92 | return fp->wp - fp->rp; | - | ||||||
| 93 | #elif defined SLOW_BUT_NO_HACKS /* users can define this */ | - | ||||||
| 94 | abort (); | - | ||||||
| 95 | return 0; | - | ||||||
| 96 | #else | - | ||||||
| 97 | #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread, ungetc on your system, then report this to bug-gnulib." | - | ||||||
| 98 | #endif | - | ||||||
| 99 | } | - | ||||||
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