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lib/libc/stdio/freadptr.c
45 строк
1 KB
guenther
Add <stdio_ext.h> with the seven APIs needed to have gnulib operate
12 авг 2024, 23:56
12 авг 2024, 23:56
24f9d66
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/* $OpenBSD: freadptr.c,v 1.1 2024/08/12 20:56:55 guenther Exp $ */ /* * Copyright (c) 2024 Philip Guenther <guenther@openbsd.org> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <stdlib.h> #include <stdio_ext.h> #include "local.h" const char * __freadptr(FILE *fp, size_t *sizep) { if ((fp->_flags & __SRD) && fp->_r > 0) { *sizep = fp->_r; return fp->_p; } return NULL; } void __freadptrinc(FILE *fp, size_t inc) { if (fp->_flags & __SRD) { fp->_r -= inc; fp->_p += inc; if (fp->_r == 0 && HASUB(fp)) { /* consumed the pushback buffer; switch back */ FREEUB(fp); if ((fp->_r = fp->_ur) != 0) fp->_p = fp->_up; } } }