diff options
Diffstat (limited to 'libc/stdio/findfp.c')
| -rw-r--r-- | libc/stdio/findfp.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/libc/stdio/findfp.c b/libc/stdio/findfp.c deleted file mode 100644 index a55a65d..0000000 --- a/libc/stdio/findfp.c +++ /dev/null @@ -1,181 +0,0 @@ -/* $OpenBSD: findfp.c,v 1.9 2005/08/08 08:05:36 espie Exp $ */ -/*- - * Copyright (c) 1990, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Chris Torek. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <sys/param.h> -#include <unistd.h> -#include <stdio.h> -#include <errno.h> -#include <stdlib.h> -#include <string.h> -#include "local.h" -#include "glue.h" - -int __sdidinit; - -#define NDYNAMIC 10 /* add ten more whenever necessary */ - -#define std(flags, file) \ - {0,0,0,flags,file,{0,0},0,__sF+file,__sclose,__sread,__sseek,__swrite, \ - {(unsigned char *)(__sFext+file), 0},NULL,0,{0,0,0},{0},{0,0},0,0} -/* p r w flags file _bf z cookie close read seek write - ext */ - - /* the usual - (stdin + stdout + stderr) */ -static FILE usual[FOPEN_MAX - 3]; -static struct __sfileext usualext[FOPEN_MAX - 3]; -static struct glue uglue = { 0, FOPEN_MAX - 3, usual }; - -struct __sfileext __sFext[3]; -FILE __sF[3] = { - std(__SRD, STDIN_FILENO), /* stdin */ - std(__SWR, STDOUT_FILENO), /* stdout */ - std(__SWR|__SNBF, STDERR_FILENO) /* stderr */ -}; -struct glue __sglue = { &uglue, 3, __sF }; - -static struct glue * -moreglue(int n) -{ - struct glue *g; - FILE *p; - struct __sfileext *pext; - static FILE empty; - char *data; - - data = malloc(sizeof(*g) + ALIGNBYTES + n * sizeof(FILE) - + n * sizeof(struct __sfileext)); - if (data == NULL) - return (NULL); - g = (struct glue *)data; - p = (FILE *)ALIGN(data + sizeof(*g)); - pext = (struct __sfileext *) - (ALIGN(data + sizeof(*g)) + n * sizeof(FILE)); - g->next = NULL; - g->niobs = n; - g->iobs = p; - while (--n >= 0) { - *p = empty; - _FILEEXT_SETUP(p, pext); - p++; - pext++; - } - return (g); -} - -/* - * Find a free FILE for fopen et al. - */ -FILE * -__sfp(void) -{ - FILE *fp; - int n; - struct glue *g; - - if (!__sdidinit) - __sinit(); - for (g = &__sglue;; g = g->next) { - for (fp = g->iobs, n = g->niobs; --n >= 0; fp++) - if (fp->_flags == 0) - goto found; - if (g->next == NULL && (g->next = moreglue(NDYNAMIC)) == NULL) - break; - } - return (NULL); -found: - fp->_flags = 1; /* reserve this slot; caller sets real flags */ - fp->_p = NULL; /* no current pointer */ - fp->_w = 0; /* nothing to read or write */ - fp->_r = 0; - fp->_bf._base = NULL; /* no buffer */ - fp->_bf._size = 0; - fp->_lbfsize = 0; /* not line buffered */ - fp->_file = -1; /* no file */ -/* fp->_cookie = <any>; */ /* caller sets cookie, _read/_write etc */ - fp->_lb._base = NULL; /* no line buffer */ - fp->_lb._size = 0; - _FILEEXT_INIT(fp); - return (fp); -} - -#if 0 -#define getdtablesize() sysconf(_SC_OPEN_MAX) - -/* - * XXX. Force immediate allocation of internal memory. Not used by stdio, - * but documented historically for certain applications. Bad applications. - */ -void -f_prealloc(void) -{ - struct glue *g; - int n; - - n = getdtablesize() - FOPEN_MAX + 20; /* 20 for slop. */ - for (g = &__sglue; (n -= g->niobs) > 0 && g->next; g = g->next) - /* void */; - if (n > 0) - g->next = moreglue(n); -} -#endif - -/* - * exit() and abort() call _cleanup() through the callback registered - * with __atexit_register_cleanup(), set whenever we open or buffer a - * file. This chicanery is done so that programs that do not use stdio - * need not link it all in. - * - * The name `_cleanup' is, alas, fairly well known outside stdio. - */ -void -_cleanup(void) -{ - /* (void) _fwalk(fclose); */ - (void) _fwalk(__sflush); /* `cheating' */ -} - -/* - * __sinit() is called whenever stdio's internal variables must be set up. - */ -void -__sinit(void) -{ - int i; - - for (i = 0; i < FOPEN_MAX - 3; i++) { - _FILEEXT_SETUP(usual+i, usualext+i); - } - /* make sure we clean up on exit */ - __atexit_register_cleanup(_cleanup); /* conservative */ - __sdidinit = 1; -} |