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//===========================================================================
//
// vsnprintf.cxx
//
// ANSI Stdio vsnprintf() function
//
//===========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2009 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: jlarmour
// Date: 1998-02-13
// 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/libc/stdio/stream.hxx>// Cyg_StdioStream
#include <cyg/libc/stdio/io.inl> // I/O system inlines
// FUNCTIONS
class Cyg_VsnprintfStream: public Cyg_OutputStream
{
public:
Cyg_VsnprintfStream(char* s): s_(s) {}
virtual Cyg_ErrNo write( const cyg_uint8 *buffer,
cyg_ucount32 buffer_length, cyg_ucount32 *bytes_written );
virtual Cyg_ErrNo get_error( void ) { return ENOERR; }
private:
char* s_;
};
Cyg_ErrNo
Cyg_VsnprintfStream::write(
const cyg_uint8 *buffer,
cyg_ucount32 buffer_length,
cyg_ucount32 *bytes_written )
{
#ifdef WHEN_MEMCPY_OPTIMISED_IN_ECOS_EVENTUALLY
memcpy(s_, buffer, buffer_length);
s_ += buffer_length;
*bytes_written = buffer_length;
#else
char *dest = s_;
char const *src = (char const *)buffer;
char const *end = src + buffer_length;
while(src < end)
*dest++ = *src++;
s_ = dest;
*bytes_written = buffer_length;
#endif
return ENOERR;
}
externC int
vsnprintf( char *s, size_t size, const char *format, va_list arg ) __THROW
{
int ret;
Cyg_VsnprintfStream stream(s);
ret = vfnprintf( (FILE *)(void *)&stream, size, format, arg );
/* If no error, and string not truncated, then apply null termination in
* correct place
*/
if ( (ret >= 0) && ((size_t)ret < size) )
s[ret] = '\0';
#ifdef CYGIMP_LIBC_STDIO_C99_SNPRINTF
/* C99 case. If no error, and string truncated, apply null termination
* in correct place
*/
if ( (ret >= 0) && ((size_t)ret >= size) && (size > 0) )
s[size-1] = '\0';
#endif
return ret;
} // vsnprintf()
// EOF vsnprintf.cxx
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