Contiki 2.6
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00001 /* 00002 * Copyright (c) 2006, Swedish Institute of Computer Science. 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. Neither the name of the Institute nor the names of its contributors 00014 * may be used to endorse or promote products derived from this software 00015 * without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 00018 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00019 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00020 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 00021 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00022 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00023 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00024 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00025 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00026 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00027 * SUCH DAMAGE. 00028 * 00029 * This file is part of the Contiki operating system. 00030 * 00031 * $Id: cfs-cooja.c,v 1.12 2010/11/15 21:44:37 adamdunkels Exp $ 00032 */ 00033 #include <string.h> 00034 #include "lib/simEnvChange.h" 00035 #include "cfs/cfs.h" 00036 00037 #define FLAG_FILE_CLOSED 0 00038 #define FLAG_FILE_OPEN 1 00039 00040 struct filestate { 00041 char flag; 00042 int access; 00043 int fileptr; 00044 int endptr; 00045 }; 00046 00047 static struct filestate file; 00048 00049 const struct simInterface cfs_interface; 00050 00051 // COOJA variables 00052 #define CFS_BUF_SIZE 4000 /* Configure CFS size here and in ContikiCFS.java */ 00053 char simCFSData[CFS_BUF_SIZE] = { 0 }; 00054 char simCFSChanged = 0; 00055 int simCFSRead = 0; 00056 int simCFSWritten = 0; 00057 00058 /*---------------------------------------------------------------------------*/ 00059 int 00060 cfs_open(const char *n, int f) 00061 { 00062 if(file.flag == FLAG_FILE_CLOSED) { 00063 file.flag = FLAG_FILE_OPEN; 00064 file.access = f; 00065 if(f & CFS_APPEND) { 00066 file.fileptr = file.endptr; 00067 } else { 00068 file.fileptr = 0; 00069 } 00070 return 0; 00071 } else { 00072 return -1; 00073 } 00074 } 00075 /*---------------------------------------------------------------------------*/ 00076 void 00077 cfs_close(int f) 00078 { 00079 file.flag = FLAG_FILE_CLOSED; 00080 } 00081 /*---------------------------------------------------------------------------*/ 00082 int 00083 cfs_read(int f, void *buf, unsigned int len) 00084 { 00085 if(file.flag == FLAG_FILE_OPEN && file.access & CFS_READ) { 00086 if(file.fileptr + len >= file.endptr) { 00087 len = file.endptr - file.fileptr; 00088 } 00089 memcpy(buf, &simCFSData[file.fileptr], len); 00090 file.fileptr += len; 00091 simCFSChanged = 1; 00092 simCFSRead += len; 00093 return len; 00094 } else { 00095 return -1; 00096 } 00097 } 00098 /*---------------------------------------------------------------------------*/ 00099 int 00100 cfs_write(int f, const void *buf, unsigned int len) 00101 { 00102 if(file.flag == FLAG_FILE_OPEN && file.access & CFS_WRITE) { 00103 if(file.fileptr + len > CFS_BUF_SIZE) { 00104 len = CFS_BUF_SIZE - file.fileptr; 00105 printf("cfs-cooja.c: warning: write truncated\n"); 00106 } 00107 memcpy(&simCFSData[file.fileptr], buf, len); 00108 file.fileptr += len; 00109 simCFSChanged = 1; 00110 simCFSWritten += len; 00111 if(file.fileptr > file.endptr) { 00112 file.endptr = file.fileptr; 00113 } 00114 return len; 00115 } else { 00116 return -1; 00117 } 00118 } 00119 /*---------------------------------------------------------------------------*/ 00120 cfs_offset_t 00121 cfs_seek(int f, cfs_offset_t o, int w) 00122 { 00123 if(file.flag == FLAG_FILE_OPEN) { 00124 if(w == CFS_SEEK_SET) { 00125 file.fileptr = o; 00126 } else if(w == CFS_SEEK_CUR) { 00127 file.fileptr += o; 00128 } else if(w == CFS_SEEK_END) { 00129 file.fileptr = file.endptr + o; 00130 } 00131 if(file.fileptr >= 0 && file.fileptr <= CFS_BUF_SIZE) { 00132 if(file.fileptr > file.endptr) { 00133 file.endptr = file.fileptr; 00134 } 00135 return file.fileptr; 00136 } 00137 } 00138 return -1; 00139 } 00140 /*---------------------------------------------------------------------------*/ 00141 int 00142 cfs_remove(const char *name) 00143 { 00144 memset(simCFSData, 0, sizeof(simCFSData)); 00145 return 0; 00146 } 00147 /*---------------------------------------------------------------------------*/ 00148 int 00149 cfs_opendir(struct cfs_dir *p, const char *n) 00150 { 00151 return 0; 00152 } 00153 /*---------------------------------------------------------------------------*/ 00154 int 00155 cfs_readdir(struct cfs_dir *p, struct cfs_dirent *e) 00156 { 00157 return 0; 00158 } 00159 /*---------------------------------------------------------------------------*/ 00160 void 00161 cfs_closedir(struct cfs_dir *p) 00162 { 00163 } 00164 /*---------------------------------------------------------------------------*/ 00165 static void 00166 doInterfaceActionsBeforeTick(void) 00167 { 00168 } 00169 /*---------------------------------------------------------------------------*/ 00170 static void 00171 doInterfaceActionsAfterTick(void) 00172 { 00173 } 00174 /*---------------------------------------------------------------------------*/ 00175 SIM_INTERFACE(cfs_interface, 00176 doInterfaceActionsBeforeTick, 00177 doInterfaceActionsAfterTick); 00178 /*---------------------------------------------------------------------------*/