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Diffstat (limited to 'lib/libc/stdio/stdio.c')
| -rw-r--r-- | lib/libc/stdio/stdio.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/lib/libc/stdio/stdio.c b/lib/libc/stdio/stdio.c new file mode 100644 index 0000000..e12dc28 --- /dev/null +++ b/lib/libc/stdio/stdio.c @@ -0,0 +1,111 @@ +/*- + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +#if 0 +static char sccsid[] = "@(#)stdio.c 8.1 (Berkeley) 6/4/93"; +#endif +static const char rcsid[] = + "$FreeBSD$"; +#endif /* LIBC_SCCS and not lint */ + +#include <fcntl.h> +#include <unistd.h> +#include <stdio.h> +#include "local.h" + +/* + * Small standard I/O/seek/close functions. + * These maintain the `known seek offset' for seek optimisation. + */ +int +__sread(cookie, buf, n) + void *cookie; + char *buf; + int n; +{ + register FILE *fp = cookie; + register int ret; + + ret = read(fp->_file, buf, (size_t)n); + /* if the read succeeded, update the current offset */ + if (ret >= 0) + fp->_offset += ret; + else + fp->_flags &= ~__SOFF; /* paranoia */ + return (ret); +} + +int +__swrite(cookie, buf, n) + void *cookie; + char const *buf; + int n; +{ + register FILE *fp = cookie; + + if (fp->_flags & __SAPP) + (void) lseek(fp->_file, (off_t)0, SEEK_END); + fp->_flags &= ~__SOFF; /* in case FAPPEND mode is set */ + return (write(fp->_file, buf, (size_t)n)); +} + +fpos_t +__sseek(cookie, offset, whence) + void *cookie; + fpos_t offset; + int whence; +{ + register FILE *fp = cookie; + register off_t ret; + + ret = lseek(fp->_file, (off_t)offset, whence); + if (ret == -1) + fp->_flags &= ~__SOFF; + else { + fp->_flags |= __SOFF; + fp->_offset = ret; + } + return (ret); +} + +int +__sclose(cookie) + void *cookie; +{ + + return (close(((FILE *)cookie)->_file)); +} |
