platform.c

00001 /*
00002  *  Platform abstraction layer
00003  *
00004  *  Copyright (C) 2006-2014, ARM Limited, All Rights Reserved
00005  *
00006  *  This file is part of mbed TLS (https://tls.mbed.org)
00007  *
00008  *  This program is free software; you can redistribute it and/or modify
00009  *  it under the terms of the GNU General Public License as published by
00010  *  the Free Software Foundation; either version 2 of the License, or
00011  *  (at your option) any later version.
00012  *
00013  *  This program is distributed in the hope that it will be useful,
00014  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016  *  GNU General Public License for more details.
00017  *
00018  *  You should have received a copy of the GNU General Public License along
00019  *  with this program; if not, write to the Free Software Foundation, Inc.,
00020  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
00021  */
00022 
00023 #if !defined(POLARSSL_CONFIG_FILE)
00024 #include "polarssl/config.h"
00025 #else
00026 #include POLARSSL_CONFIG_FILE
00027 #endif
00028 
00029 #if defined(POLARSSL_PLATFORM_C)
00030 
00031 #include "polarssl/platform.h"
00032 
00033 #if defined(POLARSSL_PLATFORM_MEMORY)
00034 #if !defined(POLARSSL_PLATFORM_STD_MALLOC)
00035 static void *platform_malloc_uninit( size_t len )
00036 {
00037     ((void) len);
00038     return( NULL );
00039 }
00040 
00041 #define POLARSSL_PLATFORM_STD_MALLOC   platform_malloc_uninit
00042 #endif /* !POLARSSL_PLATFORM_STD_MALLOC */
00043 
00044 #if !defined(POLARSSL_PLATFORM_STD_FREE)
00045 static void platform_free_uninit( void *ptr )
00046 {
00047     ((void) ptr);
00048 }
00049 
00050 #define POLARSSL_PLATFORM_STD_FREE     platform_free_uninit
00051 #endif /* !POLARSSL_PLATFORM_STD_FREE */
00052 
00053 void * (*polarssl_malloc)( size_t ) = POLARSSL_PLATFORM_STD_MALLOC;
00054 void (*polarssl_free)( void * )     = POLARSSL_PLATFORM_STD_FREE;
00055 
00056 int platform_set_malloc_free( void * (*malloc_func)( size_t ),
00057                               void (*free_func)( void * ) )
00058 {
00059     polarssl_malloc = malloc_func;
00060     polarssl_free = free_func;
00061     return( 0 );
00062 }
00063 #endif /* POLARSSL_PLATFORM_MEMORY */
00064 
00065 #if defined(POLARSSL_PLATFORM_SNPRINTF_ALT)
00066 #if !defined(POLARSSL_PLATFORM_STD_SNPRINTF)
00067 /*
00068  * Make dummy function to prevent NULL pointer dereferences
00069  */
00070 static int platform_snprintf_uninit( char * s, size_t n,
00071                                      const char * format, ... )
00072 {
00073     ((void) s);
00074     ((void) n);
00075     ((void) format);
00076     return( 0 );
00077 }
00078 
00079 #define POLARSSL_PLATFORM_STD_SNPRINTF    platform_snprintf_uninit
00080 #endif /* !POLARSSL_PLATFORM_STD_SNPRINTF */
00081 
00082 int (*polarssl_snprintf)( char * s, size_t n,
00083                           const char * format,
00084                           ... ) = POLARSSL_PLATFORM_STD_SNPRINTF;
00085 
00086 int platform_set_snprintf( int (*snprintf_func)( char * s, size_t n,
00087                                                  const char * format,
00088                                                  ... ) )
00089 {
00090     polarssl_snprintf = snprintf_func;
00091     return( 0 );
00092 }
00093 #endif /* POLARSSL_PLATFORM_SNPRINTF_ALT */
00094 
00095 #if defined(POLARSSL_PLATFORM_PRINTF_ALT)
00096 #if !defined(POLARSSL_PLATFORM_STD_PRINTF)
00097 /*
00098  * Make dummy function to prevent NULL pointer dereferences
00099  */
00100 static int platform_printf_uninit( const char *format, ... )
00101 {
00102     ((void) format);
00103     return( 0 );
00104 }
00105 
00106 #define POLARSSL_PLATFORM_STD_PRINTF    platform_printf_uninit
00107 #endif /* !POLARSSL_PLATFORM_STD_PRINTF */
00108 
00109 int (*polarssl_printf)( const char *, ... ) = POLARSSL_PLATFORM_STD_PRINTF;
00110 
00111 int platform_set_printf( int (*printf_func)( const char *, ... ) )
00112 {
00113     polarssl_printf = printf_func;
00114     return( 0 );
00115 }
00116 #endif /* POLARSSL_PLATFORM_PRINTF_ALT */
00117 
00118 #if defined(POLARSSL_PLATFORM_FPRINTF_ALT)
00119 #if !defined(POLARSSL_PLATFORM_STD_FPRINTF)
00120 /*
00121  * Make dummy function to prevent NULL pointer dereferences
00122  */
00123 static int platform_fprintf_uninit( FILE *stream, const char *format, ... )
00124 {
00125     ((void) stream);
00126     ((void) format);
00127     return( 0 );
00128 }
00129 
00130 #define POLARSSL_PLATFORM_STD_FPRINTF   platform_fprintf_uninit
00131 #endif /* !POLARSSL_PLATFORM_STD_FPRINTF */
00132 
00133 int (*polarssl_fprintf)( FILE *, const char *, ... ) =
00134                                         POLARSSL_PLATFORM_STD_FPRINTF;
00135 
00136 int platform_set_fprintf( int (*fprintf_func)( FILE *, const char *, ... ) )
00137 {
00138     polarssl_fprintf = fprintf_func;
00139     return( 0 );
00140 }
00141 #endif /* POLARSSL_PLATFORM_FPRINTF_ALT */
00142 
00143 #if defined(POLARSSL_PLATFORM_EXIT_ALT)
00144 #if !defined(POLARSSL_PLATFORM_STD_EXIT)
00145 /*
00146  * Make dummy function to prevent NULL pointer dereferences
00147  */
00148 static void platform_exit_uninit( int status )
00149 {
00150     ((void) status);
00151 }
00152 
00153 #define POLARSSL_PLATFORM_STD_EXIT   platform_exit_uninit
00154 #endif /* !POLARSSL_PLATFORM_STD_EXIT */
00155 
00156 void (*polarssl_exit)( int status ) = POLARSSL_PLATFORM_STD_EXIT;
00157 
00158 int platform_set_exit( void (*exit_func)( int status ) )
00159 {
00160     polarssl_exit = exit_func;
00161     return( 0 );
00162 }
00163 #endif /* POLARSSL_PLATFORM_EXIT_ALT */
00164 
00165 #endif /* POLARSSL_PLATFORM_C */
00166