1 //===========================================================================
5 // ANSI Stdio vsscanf() 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
15 // Software Foundation; either version 2 or (at your option) any later version.
17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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
31 // in accordance with section (3) of the GNU General Public License.
33 // This exception does not invalidate any other reasons why a work based on
34 // this file might be covered by the GNU General Public License.
36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
37 // at http://sources.redhat.com/ecos/ecos-license/
38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //===========================================================================
41 //#####DESCRIPTIONBEGIN####
43 // Author(s): 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_read(cyg_stdio_handle_t handle, 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 // we set str_p to NULL further down when the string has finished being
88 // I suspect most strings passed to sprintf will be relatively short,
89 // so we just take the simple approach rather than have the overhead
90 // of calling memcpy etc.
92 // copy string until run out of user space, or we reach its end
93 for (i = 0; i < *len ; ++i)
95 *((cyg_uint8 *)buf + i) = *str_p;
107 dev->priv = (void *)str_p;
113 static DEVIO_TABLE(devio_table,
122 vsscanf( const char *s, const char *format, va_list arg ) __THROW
124 // construct a fake device with the address of the string we've
125 // been passed as its private data. This way we can use the data
127 DEVTAB_ENTRY_NO_INIT(strdev,
129 NULL, // Dependent name (layered device)
130 &devio_table, // I/O function table
133 (void *)s); // private
134 Cyg_StdioStream my_stream( &strdev, Cyg_StdioStream::CYG_STREAM_READ,
135 false, false, _IONBF, 0, NULL );
137 return vfscanf( (FILE *)&my_stream, format, arg );
144 vsscanf( const char *s, const char *format, va_list arg ) __THROW
146 Cyg_StdioStream my_stream( Cyg_StdioStream::CYG_STREAM_READ,
147 strlen(s), (cyg_uint8 *)s );
149 return vfscanf( (FILE *)&my_stream, format, arg );