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Opencv 3.1 project on GR-PEACH board

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platform/LocalFileSystem.cpp@166:3a9487d57a5c, 2017-06-29 (annotated)

Committer:
thedo
Date:
Thu Jun 29 11:00:41 2017 +0000
Revision:
166:3a9487d57a5c
This is Opencv 3.1 project on GR-PEACH board

Who changed what in which revision?

UserRevisionLine numberNew contents of line
thedo 166:3a9487d57a5c 1 /* mbed Microcontroller Library
thedo 166:3a9487d57a5c 2 * Copyright (c) 2006-2013 ARM Limited
thedo 166:3a9487d57a5c 3 *
thedo 166:3a9487d57a5c 4 * Licensed under the Apache License, Version 2.0 (the "License");
thedo 166:3a9487d57a5c 5 * you may not use this file except in compliance with the License.
thedo 166:3a9487d57a5c 6 * You may obtain a copy of the License at
thedo 166:3a9487d57a5c 7 *
thedo 166:3a9487d57a5c 8 * http://www.apache.org/licenses/LICENSE-2.0
thedo 166:3a9487d57a5c 9 *
thedo 166:3a9487d57a5c 10 * Unless required by applicable law or agreed to in writing, software
thedo 166:3a9487d57a5c 11 * distributed under the License is distributed on an "AS IS" BASIS,
thedo 166:3a9487d57a5c 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
thedo 166:3a9487d57a5c 13 * See the License for the specific language governing permissions and
thedo 166:3a9487d57a5c 14 * limitations under the License.
thedo 166:3a9487d57a5c 15 */
thedo 166:3a9487d57a5c 16 #include "platform/LocalFileSystem.h"
thedo 166:3a9487d57a5c 17
thedo 166:3a9487d57a5c 18 #if DEVICE_LOCALFILESYSTEM
thedo 166:3a9487d57a5c 19
thedo 166:3a9487d57a5c 20 #include "platform/mbed_semihost_api.h"
thedo 166:3a9487d57a5c 21 #include <string.h>
thedo 166:3a9487d57a5c 22 #include <stdio.h>
thedo 166:3a9487d57a5c 23 #include <errno.h>
thedo 166:3a9487d57a5c 24
thedo 166:3a9487d57a5c 25 namespace mbed {
thedo 166:3a9487d57a5c 26
thedo 166:3a9487d57a5c 27 /* Extension to FINFO type defined in RTL.h (in Keil RL) - adds 'create time'. */
thedo 166:3a9487d57a5c 28 typedef struct {
thedo 166:3a9487d57a5c 29 unsigned char hr; /* Hours [0..23] */
thedo 166:3a9487d57a5c 30 unsigned char min; /* Minutes [0..59] */
thedo 166:3a9487d57a5c 31 unsigned char sec; /* Seconds [0..59] */
thedo 166:3a9487d57a5c 32 unsigned char day; /* Day [1..31] */
thedo 166:3a9487d57a5c 33 unsigned char mon; /* Month [1..12] */
thedo 166:3a9487d57a5c 34 unsigned short year; /* Year [1980..2107] */
thedo 166:3a9487d57a5c 35 } FTIME;
thedo 166:3a9487d57a5c 36
thedo 166:3a9487d57a5c 37 typedef struct { /* File Search info record */
thedo 166:3a9487d57a5c 38 char name[32]; /* File name */
thedo 166:3a9487d57a5c 39 long size; /* File size in bytes */
thedo 166:3a9487d57a5c 40 int fileID; /* System File Identification */
thedo 166:3a9487d57a5c 41 FTIME create_time; /* Date & time file was created */
thedo 166:3a9487d57a5c 42 FTIME write_time; /* Date & time of last write */
thedo 166:3a9487d57a5c 43 } XFINFO;
thedo 166:3a9487d57a5c 44
thedo 166:3a9487d57a5c 45 #define RESERVED_FOR_USER_APPLICATIONS (0x100) /* 0x100 - 0x1ff */
thedo 166:3a9487d57a5c 46 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
thedo 166:3a9487d57a5c 47
thedo 166:3a9487d57a5c 48 static int xffind (const char *pattern, XFINFO *info) {
thedo 166:3a9487d57a5c 49 unsigned param[4];
thedo 166:3a9487d57a5c 50
thedo 166:3a9487d57a5c 51 param[0] = (unsigned long)pattern;
thedo 166:3a9487d57a5c 52 param[1] = (unsigned long)strlen(pattern);
thedo 166:3a9487d57a5c 53 param[2] = (unsigned long)info;
thedo 166:3a9487d57a5c 54 param[3] = (unsigned long)sizeof(XFINFO);
thedo 166:3a9487d57a5c 55
thedo 166:3a9487d57a5c 56 return __semihost(USR_XFFIND, param);
thedo 166:3a9487d57a5c 57 }
thedo 166:3a9487d57a5c 58
thedo 166:3a9487d57a5c 59 #define OPEN_R 0
thedo 166:3a9487d57a5c 60 #define OPEN_B 1
thedo 166:3a9487d57a5c 61 #define OPEN_PLUS 2
thedo 166:3a9487d57a5c 62 #define OPEN_W 4
thedo 166:3a9487d57a5c 63 #define OPEN_A 8
thedo 166:3a9487d57a5c 64 #define OPEN_INVALID -1
thedo 166:3a9487d57a5c 65
thedo 166:3a9487d57a5c 66 int posix_to_semihost_open_flags(int flags) {
thedo 166:3a9487d57a5c 67 /* POSIX flags -> semihosting open mode */
thedo 166:3a9487d57a5c 68 int openmode;
thedo 166:3a9487d57a5c 69 if (flags & O_RDWR) {
thedo 166:3a9487d57a5c 70 /* a plus mode */
thedo 166:3a9487d57a5c 71 openmode = OPEN_PLUS;
thedo 166:3a9487d57a5c 72 if (flags & O_APPEND) {
thedo 166:3a9487d57a5c 73 openmode |= OPEN_A;
thedo 166:3a9487d57a5c 74 } else if (flags & O_TRUNC) {
thedo 166:3a9487d57a5c 75 openmode |= OPEN_W;
thedo 166:3a9487d57a5c 76 } else {
thedo 166:3a9487d57a5c 77 openmode |= OPEN_R;
thedo 166:3a9487d57a5c 78 }
thedo 166:3a9487d57a5c 79 } else if (flags & O_WRONLY) {
thedo 166:3a9487d57a5c 80 /* write or append */
thedo 166:3a9487d57a5c 81 if (flags & O_APPEND) {
thedo 166:3a9487d57a5c 82 openmode = OPEN_A;
thedo 166:3a9487d57a5c 83 } else {
thedo 166:3a9487d57a5c 84 openmode = OPEN_W;
thedo 166:3a9487d57a5c 85 }
thedo 166:3a9487d57a5c 86 } else if (flags == O_RDONLY) {
thedo 166:3a9487d57a5c 87 /* read mode */
thedo 166:3a9487d57a5c 88 openmode = OPEN_R;
thedo 166:3a9487d57a5c 89 } else {
thedo 166:3a9487d57a5c 90 /* invalid flags */
thedo 166:3a9487d57a5c 91 openmode = OPEN_INVALID;
thedo 166:3a9487d57a5c 92 }
thedo 166:3a9487d57a5c 93
thedo 166:3a9487d57a5c 94 return openmode;
thedo 166:3a9487d57a5c 95 }
thedo 166:3a9487d57a5c 96
thedo 166:3a9487d57a5c 97 FILEHANDLE local_file_open(const char* name, int flags) {
thedo 166:3a9487d57a5c 98 int openmode = posix_to_semihost_open_flags(flags);
thedo 166:3a9487d57a5c 99 if (openmode == OPEN_INVALID) {
thedo 166:3a9487d57a5c 100 return (FILEHANDLE)NULL;
thedo 166:3a9487d57a5c 101 }
thedo 166:3a9487d57a5c 102
thedo 166:3a9487d57a5c 103 FILEHANDLE fh = semihost_open(name, openmode);
thedo 166:3a9487d57a5c 104 if (fh == -1) {
thedo 166:3a9487d57a5c 105 return (FILEHANDLE)NULL;
thedo 166:3a9487d57a5c 106 }
thedo 166:3a9487d57a5c 107
thedo 166:3a9487d57a5c 108 return fh;
thedo 166:3a9487d57a5c 109 }
thedo 166:3a9487d57a5c 110
thedo 166:3a9487d57a5c 111 LocalFileHandle::LocalFileHandle(FILEHANDLE fh) : _fh(fh), pos(0) {
thedo 166:3a9487d57a5c 112 // No lock needed in constructor
thedo 166:3a9487d57a5c 113 }
thedo 166:3a9487d57a5c 114
thedo 166:3a9487d57a5c 115 int LocalFileHandle::close() {
thedo 166:3a9487d57a5c 116 int retval = semihost_close(_fh);
thedo 166:3a9487d57a5c 117 delete this;
thedo 166:3a9487d57a5c 118 return retval;
thedo 166:3a9487d57a5c 119 }
thedo 166:3a9487d57a5c 120
thedo 166:3a9487d57a5c 121 ssize_t LocalFileHandle::write(const void *buffer, size_t length) {
thedo 166:3a9487d57a5c 122 lock();
thedo 166:3a9487d57a5c 123 ssize_t n = semihost_write(_fh, (const unsigned char*)buffer, length, 0); // number of characters not written
thedo 166:3a9487d57a5c 124 n = length - n; // number of characters written
thedo 166:3a9487d57a5c 125 pos += n;
thedo 166:3a9487d57a5c 126 unlock();
thedo 166:3a9487d57a5c 127 return n;
thedo 166:3a9487d57a5c 128 }
thedo 166:3a9487d57a5c 129
thedo 166:3a9487d57a5c 130 ssize_t LocalFileHandle::read(void *buffer, size_t length) {
thedo 166:3a9487d57a5c 131 lock();
thedo 166:3a9487d57a5c 132 ssize_t n = semihost_read(_fh, (unsigned char*)buffer, length, 0); // number of characters not read
thedo 166:3a9487d57a5c 133 n = length - n; // number of characters read
thedo 166:3a9487d57a5c 134 pos += n;
thedo 166:3a9487d57a5c 135 unlock();
thedo 166:3a9487d57a5c 136 return n;
thedo 166:3a9487d57a5c 137 }
thedo 166:3a9487d57a5c 138
thedo 166:3a9487d57a5c 139 int LocalFileHandle::isatty() {
thedo 166:3a9487d57a5c 140 lock();
thedo 166:3a9487d57a5c 141 int ret = semihost_istty(_fh);
thedo 166:3a9487d57a5c 142 unlock();
thedo 166:3a9487d57a5c 143 return ret;
thedo 166:3a9487d57a5c 144 }
thedo 166:3a9487d57a5c 145
thedo 166:3a9487d57a5c 146 off_t LocalFileHandle::seek(off_t position, int whence) {
thedo 166:3a9487d57a5c 147 lock();
thedo 166:3a9487d57a5c 148 if (whence == SEEK_CUR) {
thedo 166:3a9487d57a5c 149 position += pos;
thedo 166:3a9487d57a5c 150 } else if (whence == SEEK_END) {
thedo 166:3a9487d57a5c 151 position += semihost_flen(_fh);
thedo 166:3a9487d57a5c 152 } /* otherwise SEEK_SET, so position is fine */
thedo 166:3a9487d57a5c 153
thedo 166:3a9487d57a5c 154 /* Always seems to return -1, so just ignore for now. */
thedo 166:3a9487d57a5c 155 semihost_seek(_fh, position);
thedo 166:3a9487d57a5c 156 pos = position;
thedo 166:3a9487d57a5c 157 unlock();
thedo 166:3a9487d57a5c 158 return position;
thedo 166:3a9487d57a5c 159 }
thedo 166:3a9487d57a5c 160
thedo 166:3a9487d57a5c 161 int LocalFileHandle::sync() {
thedo 166:3a9487d57a5c 162 lock();
thedo 166:3a9487d57a5c 163 int ret = semihost_ensure(_fh);
thedo 166:3a9487d57a5c 164 unlock();
thedo 166:3a9487d57a5c 165 return ret;
thedo 166:3a9487d57a5c 166 }
thedo 166:3a9487d57a5c 167
thedo 166:3a9487d57a5c 168 off_t LocalFileHandle::size() {
thedo 166:3a9487d57a5c 169 lock();
thedo 166:3a9487d57a5c 170 off_t off = semihost_flen(_fh);
thedo 166:3a9487d57a5c 171 unlock();
thedo 166:3a9487d57a5c 172 return off;
thedo 166:3a9487d57a5c 173 }
thedo 166:3a9487d57a5c 174
thedo 166:3a9487d57a5c 175 void LocalFileHandle::lock() {
thedo 166:3a9487d57a5c 176 _mutex.lock();
thedo 166:3a9487d57a5c 177 }
thedo 166:3a9487d57a5c 178
thedo 166:3a9487d57a5c 179 void LocalFileHandle::unlock() {
thedo 166:3a9487d57a5c 180 _mutex.unlock();
thedo 166:3a9487d57a5c 181 }
thedo 166:3a9487d57a5c 182
thedo 166:3a9487d57a5c 183 class LocalDirHandle : public DirHandle {
thedo 166:3a9487d57a5c 184
thedo 166:3a9487d57a5c 185 public:
thedo 166:3a9487d57a5c 186 XFINFO info;
thedo 166:3a9487d57a5c 187
thedo 166:3a9487d57a5c 188 LocalDirHandle() : info() {
thedo 166:3a9487d57a5c 189 }
thedo 166:3a9487d57a5c 190
thedo 166:3a9487d57a5c 191 virtual int close() {
thedo 166:3a9487d57a5c 192 // No lock can be used in destructor
thedo 166:3a9487d57a5c 193 delete this;
thedo 166:3a9487d57a5c 194 return 0;
thedo 166:3a9487d57a5c 195 }
thedo 166:3a9487d57a5c 196
thedo 166:3a9487d57a5c 197 virtual int read(struct dirent *ent) {
thedo 166:3a9487d57a5c 198 lock();
thedo 166:3a9487d57a5c 199 if (xffind("*", &info)!=0) {
thedo 166:3a9487d57a5c 200 unlock();
thedo 166:3a9487d57a5c 201 return 0;
thedo 166:3a9487d57a5c 202 }
thedo 166:3a9487d57a5c 203 memcpy(ent->d_name, info.name, sizeof(info.name));
thedo 166:3a9487d57a5c 204 unlock();
thedo 166:3a9487d57a5c 205 return 1;
thedo 166:3a9487d57a5c 206 }
thedo 166:3a9487d57a5c 207
thedo 166:3a9487d57a5c 208 virtual void rewind() {
thedo 166:3a9487d57a5c 209 lock();
thedo 166:3a9487d57a5c 210 info.fileID = 0;
thedo 166:3a9487d57a5c 211 unlock();
thedo 166:3a9487d57a5c 212 }
thedo 166:3a9487d57a5c 213
thedo 166:3a9487d57a5c 214 virtual off_t tell() {
thedo 166:3a9487d57a5c 215 lock();
thedo 166:3a9487d57a5c 216 int fileId = info.fileID;
thedo 166:3a9487d57a5c 217 unlock();
thedo 166:3a9487d57a5c 218 return fileId;
thedo 166:3a9487d57a5c 219 }
thedo 166:3a9487d57a5c 220
thedo 166:3a9487d57a5c 221 virtual void seek(off_t offset) {
thedo 166:3a9487d57a5c 222 lock();
thedo 166:3a9487d57a5c 223 info.fileID = offset;
thedo 166:3a9487d57a5c 224 unlock();
thedo 166:3a9487d57a5c 225 }
thedo 166:3a9487d57a5c 226
thedo 166:3a9487d57a5c 227 protected:
thedo 166:3a9487d57a5c 228 PlatformMutex _mutex;
thedo 166:3a9487d57a5c 229
thedo 166:3a9487d57a5c 230 virtual void lock() {
thedo 166:3a9487d57a5c 231 _mutex.lock();
thedo 166:3a9487d57a5c 232 }
thedo 166:3a9487d57a5c 233
thedo 166:3a9487d57a5c 234 virtual void unlock() {
thedo 166:3a9487d57a5c 235 _mutex.unlock();
thedo 166:3a9487d57a5c 236 }
thedo 166:3a9487d57a5c 237 };
thedo 166:3a9487d57a5c 238
thedo 166:3a9487d57a5c 239 int LocalFileSystem::open(FileHandle **file, const char* name, int flags) {
thedo 166:3a9487d57a5c 240 // No global state modified so function is thread safe
thedo 166:3a9487d57a5c 241
thedo 166:3a9487d57a5c 242 /* reject filenames with / in them */
thedo 166:3a9487d57a5c 243 for (const char *tmp = name; *tmp; tmp++) {
thedo 166:3a9487d57a5c 244 if (*tmp == '/') {
thedo 166:3a9487d57a5c 245 return -EINVAL;
thedo 166:3a9487d57a5c 246 }
thedo 166:3a9487d57a5c 247 }
thedo 166:3a9487d57a5c 248
thedo 166:3a9487d57a5c 249 int openmode = posix_to_semihost_open_flags(flags);
thedo 166:3a9487d57a5c 250 if (openmode == OPEN_INVALID) {
thedo 166:3a9487d57a5c 251 return -EINVAL;
thedo 166:3a9487d57a5c 252 }
thedo 166:3a9487d57a5c 253
thedo 166:3a9487d57a5c 254 FILEHANDLE fh = semihost_open(name, openmode);
thedo 166:3a9487d57a5c 255 if (fh == -1) {
thedo 166:3a9487d57a5c 256 return -EIO;
thedo 166:3a9487d57a5c 257 }
thedo 166:3a9487d57a5c 258
thedo 166:3a9487d57a5c 259 *file = new LocalFileHandle(fh);
thedo 166:3a9487d57a5c 260 return 0;
thedo 166:3a9487d57a5c 261 }
thedo 166:3a9487d57a5c 262
thedo 166:3a9487d57a5c 263 int LocalFileSystem::remove(const char *filename) {
thedo 166:3a9487d57a5c 264 // No global state modified so function is thread safe
thedo 166:3a9487d57a5c 265
thedo 166:3a9487d57a5c 266 return semihost_remove(filename);
thedo 166:3a9487d57a5c 267 }
thedo 166:3a9487d57a5c 268
thedo 166:3a9487d57a5c 269 int LocalFileSystem::open(DirHandle **dir, const char *name) {
thedo 166:3a9487d57a5c 270 // No global state modified so function is thread safe
thedo 166:3a9487d57a5c 271
thedo 166:3a9487d57a5c 272 *dir = new LocalDirHandle();
thedo 166:3a9487d57a5c 273 return 0;
thedo 166:3a9487d57a5c 274 }
thedo 166:3a9487d57a5c 275
thedo 166:3a9487d57a5c 276 } // namespace mbed
thedo 166:3a9487d57a5c 277
thedo 166:3a9487d57a5c 278 #endif
thedo 166:3a9487d57a5c 279