From 96aa2d94a2355cdc55c96e808d14a0e7f2ebe77d Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Mon, 20 Nov 1995 03:48:11 +0000 Subject: Sat Nov 18 16:46:01 1995 Ulrich Drepper * libio/Makefile, libio/cleanup.c, libio/clearerr.c, libio/feof.c, libio/ferror.c, libio/fgetc.c, libio/filedoalloc.c, libio/fileno.c, libio/fileops.c, libio/fputc.c, libio/freopen.c, libio/fseek.c, libio/genops.c, libio/getc.c, libio/getchar.c, libio/iofclose.c, libio/iofdopen.c, libio/iofflush.c, libio/iofgetpos.c, libio/iofgets.c, libio/iofopen.c, libio/iofprintf.c, libio/iofputs.c, libio/iofread.c, libio/iofscanf.c, libio/iofsetpos.c, libio/ioftell.c, libio/iofwrite.c, libio/iogetdelim.c, libio/iogetline.c, libio/iogets.c, libio/iolibio.h, libio/iopadn.c, libio/ioprims.c, libio/ioputs.c, libio/ioseekoff.c, libio/ioseekpos.c, libio/iosetbuffer.c, libio/iosetvbuf.c, libio/iosprintf.c, libio/ioungetc.c, libio/iovsprintf.c, libio/iovsscanf.c, libio/libio.h, libio/libioP.h, libio/putc.c, libio/putchar.c, libio/rewind.c, libio/setbuf.c, libio/setlinebuf.c, libio/stdfiles.c, libio/stdio.c, libio/stdio.h, libio/strfile.h, libio/strops.c, libio/vasprintf.c, libio/vscanf.c, libio/vsnprintf.c: New files. Slightly modified version from Linux libc. * libio/memstream.c, libio/vdprintf.c: New files for functions not (yet) part of GNU libio. * libio/iofopncook.c: Implementation of `fopencookie', mainly written by Per Bothner. * stdio-common/getline.c: Adapted to libio. * stdio-common/snprintf.c: Adapted to libio. * stdio-common/vfprintf.c: Adapted to libio. * stdio-common/vfscanf.c: Adapted to libio. * sysdeps/posix/tempname.c: Adapted to libio. --- libio/memstream.c | 129 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 129 insertions(+) create mode 100644 libio/memstream.c (limited to 'libio/memstream.c') diff --git a/libio/memstream.c b/libio/memstream.c new file mode 100644 index 0000000000..b1cefb0959 --- /dev/null +++ b/libio/memstream.c @@ -0,0 +1,129 @@ +/* Copyright (C) 1995 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include "strfile.h" +#include "libioP.h" +#include + + +struct _IO_FILE_memstream +{ + _IO_strfile _sf; + char **bufloc; + _IO_size_t *sizeloc; +}; + + +static int _IO_mem_sync __P ((_IO_FILE* fp)); +static int _IO_mem_close __P ((_IO_FILE* fp)); + + +static const struct _IO_jump_t _IO_mem_jumps = +{ + JUMP_INIT_DUMMY, + JUMP_INIT (finish, _IO_str_finish), + JUMP_INIT (overflow, _IO_str_overflow), + JUMP_INIT (underflow, _IO_str_underflow), + JUMP_INIT (uflow, _IO_default_uflow), + JUMP_INIT (pbackfail, _IO_str_pbackfail), + JUMP_INIT (xsputn, _IO_default_xsputn), + JUMP_INIT (xsgetn, _IO_default_xsgetn), + JUMP_INIT (seekoff, _IO_str_seekoff), + JUMP_INIT (seekpos, _IO_default_seekpos), + JUMP_INIT (setbuf, _IO_default_setbuf), + JUMP_INIT (sync, _IO_mem_sync), + JUMP_INIT (doallocate, _IO_default_doallocate), + JUMP_INIT (read, _IO_default_read), + JUMP_INIT (write, _IO_default_write), + JUMP_INIT (seek, _IO_default_seek), + JUMP_INIT (close, _IO_mem_close), + JUMP_INIT (stat, _IO_default_stat) +}; + +/* Open a stream that writes into a malloc'd buffer that is expanded as + necessary. *BUFLOC and *SIZELOC are updated with the buffer's location + and the number of characters written on fflush or fclose. */ +_IO_FILE * +open_memstream (bufloc, sizeloc) + char **bufloc; + _IO_size_t *sizeloc; +{ + struct _IO_FILE_memstream *fp; + char *buf; + + fp = (struct _IO_FILE_memstream *) + malloc (sizeof (struct _IO_FILE_memstream)); + if (fp == NULL) + return NULL; + + buf = ALLOC_BUF (_IO_BUFSIZ); + _IO_init (&fp->_sf._f, 0); + _IO_JUMPS (&fp->_sf._f) = &_IO_mem_jumps; + _IO_str_init_static (&fp->_sf._f, buf, _IO_BUFSIZ, buf); + fp->_sf._f._flags &= ~_IO_USER_BUF; + fp->_sf._s._allocate_buffer = (_IO_alloc_type) malloc; + fp->_sf._s._free_buffer = (_IO_free_type) free; + + return &fp->_sf._f; +} + + +static int +_IO_mem_sync (fp) + _IO_FILE* fp; +{ + struct _IO_FILE_memstream *mp = (struct _IO_FILE_memstream *) fp; + int res; + + res = _IO_default_sync (fp); + if (res < 0) + return res; + + if (fp->_IO_write_ptr == fp->_IO_write_end) + { + _IO_str_overflow (fp, '\0'); + --fp->_IO_write_ptr; + } + else + *fp->_IO_write_ptr = '\0'; + + *mp->bufloc = fp->_IO_buf_base; + *mp->sizeloc = _IO_blen (fp); + + return 0; +} + + +static int _IO_mem_close (fp) + _IO_FILE* fp; +{ + struct _IO_FILE_memstream *mp = (struct _IO_FILE_memstream *) fp; + int res; + + res = _IO_default_close (fp); + if (res < 0) + return res; + + *mp->bufloc = (char *) realloc (fp->_IO_buf_base, _IO_blen (fp) + 1); + if (*mp->bufloc == NULL) + return -1; + (*mp->bufloc)[_IO_blen (fp)] = '\0'; + *mp->sizeloc = _IO_blen (fp); + + return 0; +} -- cgit v1.2.3-65-gdbad