//===========================================================================
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//===========================================================================
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//
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//
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// vsscanf.cxx
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// vsscanf.cxx
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//
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//
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// ANSI Stdio vsscanf() function
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// ANSI Stdio vsscanf() function
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//
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//
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//===========================================================================
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//===========================================================================
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//####ECOSGPLCOPYRIGHTBEGIN####
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//####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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//
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later version.
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// Software Foundation; either version 2 or (at your option) any later version.
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//
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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// for more details.
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//
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//
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// You should have received a copy of the GNU General Public License along
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// You should have received a copy of the GNU General Public License along
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// with eCos; if not, write to the Free Software Foundation, Inc.,
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// with eCos; if not, write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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//
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//
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// As a special exception, if other files instantiate templates or use macros
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// As a special exception, if other files instantiate templates or use macros
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// or inline functions from this file, or you compile this file and link it
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// or inline functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. However the source code for this file must still be made available
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// License. However the source code for this file must still be made available
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// in accordance with section (3) of the GNU General Public License.
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// in accordance with section (3) of the GNU General Public License.
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//
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//
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// This exception does not invalidate any other reasons why a work based on
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// This exception does not invalidate any other reasons why a work based on
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// this file might be covered by the GNU General Public License.
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// this file might be covered by the GNU General Public License.
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//
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//
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// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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// at http://sources.redhat.com/ecos/ecos-license/
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// at http://sources.redhat.com/ecos/ecos-license/
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// -------------------------------------------
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// -------------------------------------------
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//####ECOSGPLCOPYRIGHTEND####
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//####ECOSGPLCOPYRIGHTEND####
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//===========================================================================
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//===========================================================================
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//#####DESCRIPTIONBEGIN####
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//#####DESCRIPTIONBEGIN####
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//
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//
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// Author(s): jlarmour
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// Author(s): jlarmour
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// Contributors:
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// Contributors:
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// Date: 2000-04-20
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// Date: 2000-04-20
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// Purpose:
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// Purpose:
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// Description:
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// Description:
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// Usage:
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// Usage:
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//
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//
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//####DESCRIPTIONEND####
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//####DESCRIPTIONEND####
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//
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//
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//===========================================================================
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//===========================================================================
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// CONFIGURATION
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// CONFIGURATION
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#include <pkgconf/libc_stdio.h> // Configuration header
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#include <pkgconf/libc_stdio.h> // Configuration header
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// INCLUDES
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// INCLUDES
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#include <cyg/infra/cyg_type.h> // Common project-wide type definitions
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#include <cyg/infra/cyg_type.h> // Common project-wide type definitions
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#include <stddef.h> // NULL and size_t from compiler
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#include <stddef.h> // NULL and size_t from compiler
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#include <stdio.h> // header for this file
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#include <stdio.h> // header for this file
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#include <errno.h> // error codes
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#include <errno.h> // error codes
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#include <cyg/io/devtab.h> // Device table
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#include <cyg/io/devtab.h> // Device table
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#include <cyg/libc/stdio/stream.hxx>// Cyg_StdioStream
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#include <cyg/libc/stdio/stream.hxx>// Cyg_StdioStream
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#include <cyg/libc/stdio/io.inl> // I/O system inlines
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#include <cyg/libc/stdio/io.inl> // I/O system inlines
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#ifndef CYGPKG_LIBC_STDIO_FILEIO
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#ifndef CYGPKG_LIBC_STDIO_FILEIO
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// FUNCTIONS
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// FUNCTIONS
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static Cyg_ErrNo
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static Cyg_ErrNo
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str_read(cyg_stdio_handle_t handle, void *buf, cyg_uint32 *len)
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str_read(cyg_stdio_handle_t handle, void *buf, cyg_uint32 *len)
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{
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{
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cyg_devtab_entry_t *dev = (cyg_devtab_entry_t *)handle;
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cyg_devtab_entry_t *dev = (cyg_devtab_entry_t *)handle;
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cyg_uint8 *str_p = (cyg_uint8 *)dev->priv;
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cyg_uint8 *str_p = (cyg_uint8 *)dev->priv;
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cyg_ucount32 i;
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cyg_ucount32 i;
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// we set str_p to NULL further down when the string has finished being
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// we set str_p to NULL further down when the string has finished being
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// read
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// read
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if (str_p == NULL)
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if (str_p == NULL)
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{
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{
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*len = 0;
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*len = 0;
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return ENOERR;
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return ENOERR;
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} // if
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} // if
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// I suspect most strings passed to sprintf will be relatively short,
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// I suspect most strings passed to sprintf will be relatively short,
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// so we just take the simple approach rather than have the overhead
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// so we just take the simple approach rather than have the overhead
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// of calling memcpy etc.
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// of calling memcpy etc.
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// copy string until run out of user space, or we reach its end
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// copy string until run out of user space, or we reach its end
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for (i = 0; i < *len ; ++i)
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for (i = 0; i < *len ; ++i)
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{
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{
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*((cyg_uint8 *)buf + i) = *str_p;
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*((cyg_uint8 *)buf + i) = *str_p;
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if (*str_p++ == '\0')
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if (*str_p++ == '\0')
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{
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{
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str_p = NULL;
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str_p = NULL;
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++i;
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++i;
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break;
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break;
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} // if
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} // if
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} // for
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} // for
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*len = i;
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*len = i;
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dev->priv = (void *)str_p;
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dev->priv = (void *)str_p;
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return ENOERR;
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return ENOERR;
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} // str_read()
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} // str_read()
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static DEVIO_TABLE(devio_table,
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static DEVIO_TABLE(devio_table,
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NULL, // write
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NULL, // write
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str_read, // read
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str_read, // read
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NULL, // select
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NULL, // select
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NULL, // get_config
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NULL, // get_config
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NULL); // set_config
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NULL); // set_config
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externC int
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externC int
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vsscanf( const char *s, const char *format, va_list arg )
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vsscanf( const char *s, const char *format, va_list arg )
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{
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{
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// construct a fake device with the address of the string we've
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// construct a fake device with the address of the string we've
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// been passed as its private data. This way we can use the data
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// been passed as its private data. This way we can use the data
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// directly
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// directly
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DEVTAB_ENTRY_NO_INIT(strdev,
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DEVTAB_ENTRY_NO_INIT(strdev,
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"strdev", // Name
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"strdev", // Name
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NULL, // Dependent name (layered device)
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NULL, // Dependent name (layered device)
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&devio_table, // I/O function table
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&devio_table, // I/O function table
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NULL, // Init
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NULL, // Init
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NULL, // Lookup
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NULL, // Lookup
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(void *)s); // private
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(void *)s); // private
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Cyg_StdioStream my_stream( &strdev, Cyg_StdioStream::CYG_STREAM_READ,
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Cyg_StdioStream my_stream( &strdev, Cyg_StdioStream::CYG_STREAM_READ,
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false, false, _IONBF, 0, NULL );
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false, false, _IONBF, 0, NULL );
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return vfscanf( (FILE *)&my_stream, format, arg );
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return vfscanf( (FILE *)&my_stream, format, arg );
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} // vsscanf()
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} // vsscanf()
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#else
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#else
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externC int
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externC int
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vsscanf( const char *s, const char *format, va_list arg )
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vsscanf( const char *s, const char *format, va_list arg )
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{
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{
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Cyg_StdioStream my_stream( Cyg_StdioStream::CYG_STREAM_READ,
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Cyg_StdioStream my_stream( Cyg_StdioStream::CYG_STREAM_READ,
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strlen(s), (cyg_uint8 *)s );
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strlen(s), (cyg_uint8 *)s );
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return vfscanf( (FILE *)&my_stream, format, arg );
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return vfscanf( (FILE *)&my_stream, format, arg );
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} // vsscanf()
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} // vsscanf()
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#endif
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#endif
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// EOF vsscanf.cxx
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// EOF vsscanf.cxx
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