1 //===========================================================================
5 // ANSI Stdio vsnprintf() function
7 //===========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
13 // eCos is free software; you can redistribute it and/or modify it under
14 // the terms of the GNU General Public License as published by the Free
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 // You should have received a copy of the GNU General Public License along
23 // with eCos; if not, write to the Free Software Foundation, Inc.,
24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
26 // As a special exception, if other files instantiate templates or use macros
27 // or inline functions from this file, or you compile this file and link it
28 // with other works to produce a work based on this file, this file does not
29 // by itself cause the resulting work to be covered by the GNU General Public
30 // License. However the source code for this file must still be made available
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37 // at http://sources.redhat.com/ecos/ecos-license/
38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //===========================================================================
41 //#####DESCRIPTIONBEGIN####
43 // Author(s): jlarmour
44 // Contributors: jlarmour
50 //####DESCRIPTIONEND####
52 //===========================================================================
56 #include <pkgconf/libc_stdio.h> // Configuration header
60 #include <cyg/infra/cyg_type.h> // Common project-wide type definitions
61 #include <stddef.h> // NULL and size_t from compiler
62 #include <stdio.h> // header for this file
63 #include <errno.h> // error codes
64 #include <cyg/io/devtab.h> // Device table
65 #include <cyg/libc/stdio/stream.hxx>// Cyg_StdioStream
67 #include <cyg/libc/stdio/io.inl> // I/O system inlines
69 #ifndef CYGPKG_LIBC_STDIO_FILEIO
74 str_write(cyg_stdio_handle_t handle, const void *buf, cyg_uint32 *len)
76 cyg_devtab_entry_t *dev = (cyg_devtab_entry_t *)handle;
77 cyg_uint8 **str_p = (cyg_uint8 **)dev->priv;
80 // I suspect most strings passed to vsnprintf will be relatively short,
81 // so we just take the simple approach rather than have the overhead
82 // of calling memcpy etc.
84 // simply copy string until we run out of user space
86 for (i = 0; i < *len; i++, (*str_p)++ )
88 **str_p = *((cyg_uint8 *)buf + i);
97 static DEVIO_TABLE(devio_table,
105 vsnprintf( char *s, size_t size, const char *format, va_list arg ) __THROW
108 // construct a fake device with the address of the string we've
109 // been passed as its private data. This way we can use the data
111 DEVTAB_ENTRY_NO_INIT(strdev,
113 NULL, // Dependent name (layered device)
114 &devio_table, // I/O function table
118 Cyg_StdioStream my_stream( &strdev, Cyg_StdioStream::CYG_STREAM_WRITE,
119 false, false, _IONBF, 0, NULL );
121 rc = vfnprintf( (FILE *)&my_stream, size, format, arg );
123 // Null-terminate it, but note that s has been changed by str_write(), so
124 // that it now points to the end of the string
134 vsnprintf( char *s, size_t size, const char *format, va_list arg ) __THROW
138 Cyg_StdioStream my_stream( Cyg_StdioStream::CYG_STREAM_WRITE,
139 size, (cyg_uint8 *)s );
141 rc = vfnprintf( (FILE *)&my_stream, size, format, arg );