Daiki Kato / mbed-os-lychee

mbed-os for GR-LYCHEE

Dependents:   mbed-os-example-blinky-gr-lychee GR-Boads_Camera_sample GR-Boards_Audio_Recoder GR-Boads_Camera_DisplayApp ... more

drivers/LocalFileSystem.cpp@0:f782d9c66c49, 2018-02-02 (annotated)

Committer:
dkato
Date:
Fri Feb 02 05:42:23 2018 +0000
Revision:
0:f782d9c66c49
mbed-os for GR-LYCHEE

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dkato 0:f782d9c66c49 1 /* mbed Microcontroller Library
dkato 0:f782d9c66c49 2 * Copyright (c) 2006-2013 ARM Limited
dkato 0:f782d9c66c49 3 *
dkato 0:f782d9c66c49 4 * Licensed under the Apache License, Version 2.0 (the "License");
dkato 0:f782d9c66c49 5 * you may not use this file except in compliance with the License.
dkato 0:f782d9c66c49 6 * You may obtain a copy of the License at
dkato 0:f782d9c66c49 7 *
dkato 0:f782d9c66c49 8 * http://www.apache.org/licenses/LICENSE-2.0
dkato 0:f782d9c66c49 9 *
dkato 0:f782d9c66c49 10 * Unless required by applicable law or agreed to in writing, software
dkato 0:f782d9c66c49 11 * distributed under the License is distributed on an "AS IS" BASIS,
dkato 0:f782d9c66c49 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
dkato 0:f782d9c66c49 13 * See the License for the specific language governing permissions and
dkato 0:f782d9c66c49 14 * limitations under the License.
dkato 0:f782d9c66c49 15 */
dkato 0:f782d9c66c49 16 #include "drivers/LocalFileSystem.h"
dkato 0:f782d9c66c49 17
dkato 0:f782d9c66c49 18 #if DEVICE_LOCALFILESYSTEM
dkato 0:f782d9c66c49 19
dkato 0:f782d9c66c49 20 #include "platform/mbed_semihost_api.h"
dkato 0:f782d9c66c49 21 #include <string.h>
dkato 0:f782d9c66c49 22 #include <stdio.h>
dkato 0:f782d9c66c49 23
dkato 0:f782d9c66c49 24 namespace mbed {
dkato 0:f782d9c66c49 25
dkato 0:f782d9c66c49 26 /* Extension to FINFO type defined in RTL.h (in Keil RL) - adds 'create time'. */
dkato 0:f782d9c66c49 27 typedef struct {
dkato 0:f782d9c66c49 28 unsigned char hr; /* Hours [0..23] */
dkato 0:f782d9c66c49 29 unsigned char min; /* Minutes [0..59] */
dkato 0:f782d9c66c49 30 unsigned char sec; /* Seconds [0..59] */
dkato 0:f782d9c66c49 31 unsigned char day; /* Day [1..31] */
dkato 0:f782d9c66c49 32 unsigned char mon; /* Month [1..12] */
dkato 0:f782d9c66c49 33 unsigned short year; /* Year [1980..2107] */
dkato 0:f782d9c66c49 34 } FTIME;
dkato 0:f782d9c66c49 35
dkato 0:f782d9c66c49 36 typedef struct { /* File Search info record */
dkato 0:f782d9c66c49 37 char name[32]; /* File name */
dkato 0:f782d9c66c49 38 long size; /* File size in bytes */
dkato 0:f782d9c66c49 39 int fileID; /* System File Identification */
dkato 0:f782d9c66c49 40 FTIME create_time; /* Date & time file was created */
dkato 0:f782d9c66c49 41 FTIME write_time; /* Date & time of last write */
dkato 0:f782d9c66c49 42 } XFINFO;
dkato 0:f782d9c66c49 43
dkato 0:f782d9c66c49 44 #define RESERVED_FOR_USER_APPLICATIONS (0x100) /* 0x100 - 0x1ff */
dkato 0:f782d9c66c49 45 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
dkato 0:f782d9c66c49 46
dkato 0:f782d9c66c49 47 static int xffind (const char *pattern, XFINFO *info) {
dkato 0:f782d9c66c49 48 unsigned param[4];
dkato 0:f782d9c66c49 49
dkato 0:f782d9c66c49 50 param[0] = (unsigned long)pattern;
dkato 0:f782d9c66c49 51 param[1] = (unsigned long)strlen(pattern);
dkato 0:f782d9c66c49 52 param[2] = (unsigned long)info;
dkato 0:f782d9c66c49 53 param[3] = (unsigned long)sizeof(XFINFO);
dkato 0:f782d9c66c49 54
dkato 0:f782d9c66c49 55 return __semihost(USR_XFFIND, param);
dkato 0:f782d9c66c49 56 }
dkato 0:f782d9c66c49 57
dkato 0:f782d9c66c49 58 #define OPEN_R 0
dkato 0:f782d9c66c49 59 #define OPEN_B 1
dkato 0:f782d9c66c49 60 #define OPEN_PLUS 2
dkato 0:f782d9c66c49 61 #define OPEN_W 4
dkato 0:f782d9c66c49 62 #define OPEN_A 8
dkato 0:f782d9c66c49 63 #define OPEN_INVALID -1
dkato 0:f782d9c66c49 64
dkato 0:f782d9c66c49 65 int posix_to_semihost_open_flags(int flags) {
dkato 0:f782d9c66c49 66 /* POSIX flags -> semihosting open mode */
dkato 0:f782d9c66c49 67 int openmode;
dkato 0:f782d9c66c49 68 if (flags & O_RDWR) {
dkato 0:f782d9c66c49 69 /* a plus mode */
dkato 0:f782d9c66c49 70 openmode = OPEN_PLUS;
dkato 0:f782d9c66c49 71 if (flags & O_APPEND) {
dkato 0:f782d9c66c49 72 openmode |= OPEN_A;
dkato 0:f782d9c66c49 73 } else if (flags & O_TRUNC) {
dkato 0:f782d9c66c49 74 openmode |= OPEN_W;
dkato 0:f782d9c66c49 75 } else {
dkato 0:f782d9c66c49 76 openmode |= OPEN_R;
dkato 0:f782d9c66c49 77 }
dkato 0:f782d9c66c49 78 } else if (flags & O_WRONLY) {
dkato 0:f782d9c66c49 79 /* write or append */
dkato 0:f782d9c66c49 80 if (flags & O_APPEND) {
dkato 0:f782d9c66c49 81 openmode = OPEN_A;
dkato 0:f782d9c66c49 82 } else {
dkato 0:f782d9c66c49 83 openmode = OPEN_W;
dkato 0:f782d9c66c49 84 }
dkato 0:f782d9c66c49 85 } else if (flags == O_RDONLY) {
dkato 0:f782d9c66c49 86 /* read mode */
dkato 0:f782d9c66c49 87 openmode = OPEN_R;
dkato 0:f782d9c66c49 88 } else {
dkato 0:f782d9c66c49 89 /* invalid flags */
dkato 0:f782d9c66c49 90 openmode = OPEN_INVALID;
dkato 0:f782d9c66c49 91 }
dkato 0:f782d9c66c49 92
dkato 0:f782d9c66c49 93 return openmode;
dkato 0:f782d9c66c49 94 }
dkato 0:f782d9c66c49 95
dkato 0:f782d9c66c49 96 FILEHANDLE local_file_open(const char* name, int flags) {
dkato 0:f782d9c66c49 97 int openmode = posix_to_semihost_open_flags(flags);
dkato 0:f782d9c66c49 98 if (openmode == OPEN_INVALID) {
dkato 0:f782d9c66c49 99 return (FILEHANDLE)NULL;
dkato 0:f782d9c66c49 100 }
dkato 0:f782d9c66c49 101
dkato 0:f782d9c66c49 102 FILEHANDLE fh = semihost_open(name, openmode);
dkato 0:f782d9c66c49 103 if (fh == -1) {
dkato 0:f782d9c66c49 104 return (FILEHANDLE)NULL;
dkato 0:f782d9c66c49 105 }
dkato 0:f782d9c66c49 106
dkato 0:f782d9c66c49 107 return fh;
dkato 0:f782d9c66c49 108 }
dkato 0:f782d9c66c49 109
dkato 0:f782d9c66c49 110 LocalFileHandle::LocalFileHandle(FILEHANDLE fh) : _fh(fh), pos(0) {
dkato 0:f782d9c66c49 111 // No lock needed in constructor
dkato 0:f782d9c66c49 112 }
dkato 0:f782d9c66c49 113
dkato 0:f782d9c66c49 114 int LocalFileHandle::close() {
dkato 0:f782d9c66c49 115 int retval = semihost_close(_fh);
dkato 0:f782d9c66c49 116 delete this;
dkato 0:f782d9c66c49 117 return retval;
dkato 0:f782d9c66c49 118 }
dkato 0:f782d9c66c49 119
dkato 0:f782d9c66c49 120 ssize_t LocalFileHandle::write(const void *buffer, size_t length) {
dkato 0:f782d9c66c49 121 lock();
dkato 0:f782d9c66c49 122 ssize_t n = semihost_write(_fh, (const unsigned char*)buffer, length, 0); // number of characters not written
dkato 0:f782d9c66c49 123 n = length - n; // number of characters written
dkato 0:f782d9c66c49 124 pos += n;
dkato 0:f782d9c66c49 125 unlock();
dkato 0:f782d9c66c49 126 return n;
dkato 0:f782d9c66c49 127 }
dkato 0:f782d9c66c49 128
dkato 0:f782d9c66c49 129 ssize_t LocalFileHandle::read(void *buffer, size_t length) {
dkato 0:f782d9c66c49 130 lock();
dkato 0:f782d9c66c49 131 ssize_t n = semihost_read(_fh, (unsigned char*)buffer, length, 0); // number of characters not read
dkato 0:f782d9c66c49 132 n = length - n; // number of characters read
dkato 0:f782d9c66c49 133 pos += n;
dkato 0:f782d9c66c49 134 unlock();
dkato 0:f782d9c66c49 135 return n;
dkato 0:f782d9c66c49 136 }
dkato 0:f782d9c66c49 137
dkato 0:f782d9c66c49 138 int LocalFileHandle::isatty() {
dkato 0:f782d9c66c49 139 lock();
dkato 0:f782d9c66c49 140 int ret = semihost_istty(_fh);
dkato 0:f782d9c66c49 141 unlock();
dkato 0:f782d9c66c49 142 return ret;
dkato 0:f782d9c66c49 143 }
dkato 0:f782d9c66c49 144
dkato 0:f782d9c66c49 145 off_t LocalFileHandle::lseek(off_t position, int whence) {
dkato 0:f782d9c66c49 146 lock();
dkato 0:f782d9c66c49 147 if (whence == SEEK_CUR) {
dkato 0:f782d9c66c49 148 position += pos;
dkato 0:f782d9c66c49 149 } else if (whence == SEEK_END) {
dkato 0:f782d9c66c49 150 position += semihost_flen(_fh);
dkato 0:f782d9c66c49 151 } /* otherwise SEEK_SET, so position is fine */
dkato 0:f782d9c66c49 152
dkato 0:f782d9c66c49 153 /* Always seems to return -1, so just ignore for now. */
dkato 0:f782d9c66c49 154 semihost_seek(_fh, position);
dkato 0:f782d9c66c49 155 pos = position;
dkato 0:f782d9c66c49 156 unlock();
dkato 0:f782d9c66c49 157 return position;
dkato 0:f782d9c66c49 158 }
dkato 0:f782d9c66c49 159
dkato 0:f782d9c66c49 160 int LocalFileHandle::fsync() {
dkato 0:f782d9c66c49 161 lock();
dkato 0:f782d9c66c49 162 int ret = semihost_ensure(_fh);
dkato 0:f782d9c66c49 163 unlock();
dkato 0:f782d9c66c49 164 return ret;
dkato 0:f782d9c66c49 165 }
dkato 0:f782d9c66c49 166
dkato 0:f782d9c66c49 167 off_t LocalFileHandle::flen() {
dkato 0:f782d9c66c49 168 lock();
dkato 0:f782d9c66c49 169 off_t off = semihost_flen(_fh);
dkato 0:f782d9c66c49 170 unlock();
dkato 0:f782d9c66c49 171 return off;
dkato 0:f782d9c66c49 172 }
dkato 0:f782d9c66c49 173
dkato 0:f782d9c66c49 174 void LocalFileHandle::lock() {
dkato 0:f782d9c66c49 175 _mutex.lock();
dkato 0:f782d9c66c49 176 }
dkato 0:f782d9c66c49 177
dkato 0:f782d9c66c49 178 void LocalFileHandle::unlock() {
dkato 0:f782d9c66c49 179 _mutex.unlock();
dkato 0:f782d9c66c49 180 }
dkato 0:f782d9c66c49 181
dkato 0:f782d9c66c49 182 class LocalDirHandle : public DirHandle {
dkato 0:f782d9c66c49 183
dkato 0:f782d9c66c49 184 public:
dkato 0:f782d9c66c49 185 struct dirent cur_entry;
dkato 0:f782d9c66c49 186 XFINFO info;
dkato 0:f782d9c66c49 187
dkato 0:f782d9c66c49 188 LocalDirHandle() : cur_entry(), info() {
dkato 0:f782d9c66c49 189 }
dkato 0:f782d9c66c49 190
dkato 0:f782d9c66c49 191 virtual int closedir() {
dkato 0:f782d9c66c49 192 // No lock can be used in destructor
dkato 0:f782d9c66c49 193 delete this;
dkato 0:f782d9c66c49 194 return 0;
dkato 0:f782d9c66c49 195 }
dkato 0:f782d9c66c49 196
dkato 0:f782d9c66c49 197 virtual struct dirent *readdir() {
dkato 0:f782d9c66c49 198 lock();
dkato 0:f782d9c66c49 199 if (xffind("*", &info)!=0) {
dkato 0:f782d9c66c49 200 unlock();
dkato 0:f782d9c66c49 201 return NULL;
dkato 0:f782d9c66c49 202 }
dkato 0:f782d9c66c49 203 memcpy(cur_entry.d_name, info.name, sizeof(info.name));
dkato 0:f782d9c66c49 204 unlock();
dkato 0:f782d9c66c49 205 return &cur_entry;
dkato 0:f782d9c66c49 206 }
dkato 0:f782d9c66c49 207
dkato 0:f782d9c66c49 208 virtual void rewinddir() {
dkato 0:f782d9c66c49 209 lock();
dkato 0:f782d9c66c49 210 info.fileID = 0;
dkato 0:f782d9c66c49 211 unlock();
dkato 0:f782d9c66c49 212 }
dkato 0:f782d9c66c49 213
dkato 0:f782d9c66c49 214 virtual off_t telldir() {
dkato 0:f782d9c66c49 215 lock();
dkato 0:f782d9c66c49 216 int fileId = info.fileID;
dkato 0:f782d9c66c49 217 unlock();
dkato 0:f782d9c66c49 218 return fileId;
dkato 0:f782d9c66c49 219 }
dkato 0:f782d9c66c49 220
dkato 0:f782d9c66c49 221 virtual void seekdir(off_t offset) {
dkato 0:f782d9c66c49 222 lock();
dkato 0:f782d9c66c49 223 info.fileID = offset;
dkato 0:f782d9c66c49 224 unlock();
dkato 0:f782d9c66c49 225 }
dkato 0:f782d9c66c49 226
dkato 0:f782d9c66c49 227 protected:
dkato 0:f782d9c66c49 228 PlatformMutex _mutex;
dkato 0:f782d9c66c49 229
dkato 0:f782d9c66c49 230 virtual void lock() {
dkato 0:f782d9c66c49 231 _mutex.lock();
dkato 0:f782d9c66c49 232 }
dkato 0:f782d9c66c49 233
dkato 0:f782d9c66c49 234 virtual void unlock() {
dkato 0:f782d9c66c49 235 _mutex.unlock();
dkato 0:f782d9c66c49 236 }
dkato 0:f782d9c66c49 237 };
dkato 0:f782d9c66c49 238
dkato 0:f782d9c66c49 239 FileHandle *LocalFileSystem::open(const char* name, int flags) {
dkato 0:f782d9c66c49 240 // No global state modified so function is thread safe
dkato 0:f782d9c66c49 241
dkato 0:f782d9c66c49 242 /* reject filenames with / in them */
dkato 0:f782d9c66c49 243 for (const char *tmp = name; *tmp; tmp++) {
dkato 0:f782d9c66c49 244 if (*tmp == '/') {
dkato 0:f782d9c66c49 245 return NULL;
dkato 0:f782d9c66c49 246 }
dkato 0:f782d9c66c49 247 }
dkato 0:f782d9c66c49 248
dkato 0:f782d9c66c49 249 int openmode = posix_to_semihost_open_flags(flags);
dkato 0:f782d9c66c49 250 if (openmode == OPEN_INVALID) {
dkato 0:f782d9c66c49 251 return NULL;
dkato 0:f782d9c66c49 252 }
dkato 0:f782d9c66c49 253
dkato 0:f782d9c66c49 254 FILEHANDLE fh = semihost_open(name, openmode);
dkato 0:f782d9c66c49 255 if (fh == -1) {
dkato 0:f782d9c66c49 256 return NULL;
dkato 0:f782d9c66c49 257 }
dkato 0:f782d9c66c49 258 return new LocalFileHandle(fh);
dkato 0:f782d9c66c49 259 }
dkato 0:f782d9c66c49 260
dkato 0:f782d9c66c49 261 int LocalFileSystem::remove(const char *filename) {
dkato 0:f782d9c66c49 262 // No global state modified so function is thread safe
dkato 0:f782d9c66c49 263
dkato 0:f782d9c66c49 264 return semihost_remove(filename);
dkato 0:f782d9c66c49 265 }
dkato 0:f782d9c66c49 266
dkato 0:f782d9c66c49 267 DirHandle *LocalFileSystem::opendir(const char *name) {
dkato 0:f782d9c66c49 268 // No global state modified so function is thread safe
dkato 0:f782d9c66c49 269
dkato 0:f782d9c66c49 270 return new LocalDirHandle();
dkato 0:f782d9c66c49 271 }
dkato 0:f782d9c66c49 272
dkato 0:f782d9c66c49 273 } // namespace mbed
dkato 0:f782d9c66c49 274
dkato 0:f782d9c66c49 275 #endif