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//===========================================================================
//
// vsscanf.cxx
//
// ANSI Stdio vsscanf() function
//
//===========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later
// version.
//
// eCos 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 General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//===========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): jlarmour
// Contributors:
// Date: 2000-04-20
// Purpose:
// Description:
// Usage:
//
//####DESCRIPTIONEND####
//
//===========================================================================
// CONFIGURATION
#include <pkgconf/libc_stdio.h> // Configuration header
// INCLUDES
#include <cyg/infra/cyg_type.h> // Common project-wide type definitions
#include <stddef.h> // NULL and size_t from compiler
#include <stdio.h> // header for this file
#include <errno.h> // error codes
#include <cyg/io/devtab.h> // Device table
#include <cyg/libc/stdio/stream.hxx>// Cyg_StdioStream
#include <cyg/libc/stdio/io.inl> // I/O system inlines
#ifndef CYGPKG_LIBC_STDIO_FILEIO
// FUNCTIONS
static Cyg_ErrNo
str_read(cyg_stdio_handle_t handle, void *buf, cyg_uint32 *len)
{
cyg_devtab_entry_t *dev = (cyg_devtab_entry_t *)handle;
cyg_uint8 *str_p = (cyg_uint8 *)dev->priv;
cyg_ucount32 i;
// we set str_p to NULL further down when the string has finished being
// read
if (str_p == NULL)
{
*len = 0;
return ENOERR;
} // if
// I suspect most strings passed to sprintf will be relatively short,
// so we just take the simple approach rather than have the overhead
// of calling memcpy etc.
// copy string until run out of user space, or we reach its end
for (i = 0; i < *len ; ++i)
{
*((cyg_uint8 *)buf + i) = *str_p;
if (*str_p++ == '\0')
{
str_p = NULL;
++i;
break;
} // if
} // for
*len = i;
dev->priv = (void *)str_p;
return ENOERR;
} // str_read()
static DEVIO_TABLE(devio_table,
NULL, // write
str_read, // read
NULL, // select
NULL, // get_config
NULL); // set_config
externC int
vsscanf( const char *s, const char *format, va_list arg ) __THROW
{
// construct a fake device with the address of the string we've
// been passed as its private data. This way we can use the data
// directly
DEVTAB_ENTRY_NO_INIT(strdev,
"strdev", // Name
NULL, // Dependent name (layered device)
&devio_table, // I/O function table
NULL, // Init
NULL, // Lookup
(void *)s); // private
Cyg_StdioStream my_stream( &strdev, Cyg_StdioStream::CYG_STREAM_READ,
false, false, _IONBF, 0, NULL );
return vfscanf( (FILE *)&my_stream, format, arg );
} // vsscanf()
#else
externC int
vsscanf( const char *s, const char *format, va_list arg ) __THROW
{
Cyg_StdioStream my_stream( Cyg_StdioStream::CYG_STREAM_READ,
strlen(s), (cyg_uint8 *)s );
return vfscanf( (FILE *)&my_stream, format, arg );
} // vsscanf()
#endif
// EOF vsscanf.cxx
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