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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 Red Hat, 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., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 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. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-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 ) { // 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 ) { 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