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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

common/LocalFileSystem.cpp@9:0ce32e54c9a7, 2013-06-10 (annotated)

Committer:
emilmont
Date:
Mon Jun 10 16:03:00 2013 +0100
Revision:
9:0ce32e54c9a7
Parent:
cpp/LocalFileSystem.cpp@2:143cac498751
Child:
10:3bc89ef62ce7
Refactoring of the mbed SDK:

- Provide a well defined HAL and API

- Keep separated the HAL implementations for the different targets

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:fd0d7bdfcdc2 1 /* mbed Microcontroller Library
emilmont 2:143cac498751 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 0:fd0d7bdfcdc2 3 *
emilmont 2:143cac498751 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 2:143cac498751 5 * you may not use this file except in compliance with the License.
emilmont 2:143cac498751 6 * You may obtain a copy of the License at
mbed_official 0:fd0d7bdfcdc2 7 *
emilmont 2:143cac498751 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 0:fd0d7bdfcdc2 9 *
emilmont 2:143cac498751 10 * Unless required by applicable law or agreed to in writing, software
emilmont 2:143cac498751 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 2:143cac498751 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 2:143cac498751 13 * See the License for the specific language governing permissions and
emilmont 2:143cac498751 14 * limitations under the License.
mbed_official 0:fd0d7bdfcdc2 15 */
mbed_official 0:fd0d7bdfcdc2 16 #include "LocalFileSystem.h"
mbed_official 0:fd0d7bdfcdc2 17
mbed_official 0:fd0d7bdfcdc2 18 #if DEVICE_LOCALFILESYSTEM
mbed_official 0:fd0d7bdfcdc2 19
mbed_official 0:fd0d7bdfcdc2 20 #include "semihost_api.h"
mbed_official 0:fd0d7bdfcdc2 21 #include <string.h>
mbed_official 0:fd0d7bdfcdc2 22 #include <stdio.h>
mbed_official 0:fd0d7bdfcdc2 23
mbed_official 0:fd0d7bdfcdc2 24 namespace mbed {
mbed_official 0:fd0d7bdfcdc2 25
mbed_official 0:fd0d7bdfcdc2 26 /* Extension to FINFO type defined in RTL.h (in Keil RL) - adds 'create time'. */
mbed_official 0:fd0d7bdfcdc2 27 typedef struct {
mbed_official 0:fd0d7bdfcdc2 28 unsigned char hr; /* Hours [0..23] */
mbed_official 0:fd0d7bdfcdc2 29 unsigned char min; /* Minutes [0..59] */
mbed_official 0:fd0d7bdfcdc2 30 unsigned char sec; /* Seconds [0..59] */
mbed_official 0:fd0d7bdfcdc2 31 unsigned char day; /* Day [1..31] */
mbed_official 0:fd0d7bdfcdc2 32 unsigned char mon; /* Month [1..12] */
mbed_official 0:fd0d7bdfcdc2 33 unsigned short year; /* Year [1980..2107] */
mbed_official 0:fd0d7bdfcdc2 34 } FTIME;
mbed_official 0:fd0d7bdfcdc2 35
mbed_official 0:fd0d7bdfcdc2 36 typedef struct { /* File Search info record */
mbed_official 0:fd0d7bdfcdc2 37 char name[32]; /* File name */
mbed_official 0:fd0d7bdfcdc2 38 long size; /* File size in bytes */
mbed_official 0:fd0d7bdfcdc2 39 int fileID; /* System File Identification */
mbed_official 0:fd0d7bdfcdc2 40 FTIME create_time; /* Date & time file was created */
mbed_official 0:fd0d7bdfcdc2 41 FTIME write_time; /* Date & time of last write */
mbed_official 0:fd0d7bdfcdc2 42 } XFINFO;
mbed_official 0:fd0d7bdfcdc2 43
mbed_official 0:fd0d7bdfcdc2 44 #define RESERVED_FOR_USER_APPLICATIONS (0x100) /* 0x100 - 0x1ff */
mbed_official 0:fd0d7bdfcdc2 45 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
mbed_official 0:fd0d7bdfcdc2 46
mbed_official 0:fd0d7bdfcdc2 47 static int xffind (const char *pattern, XFINFO *info) {
mbed_official 0:fd0d7bdfcdc2 48 unsigned param[4];
mbed_official 0:fd0d7bdfcdc2 49
mbed_official 0:fd0d7bdfcdc2 50 param[0] = (unsigned long)pattern;
mbed_official 0:fd0d7bdfcdc2 51 param[1] = (unsigned long)strlen(pattern);
mbed_official 0:fd0d7bdfcdc2 52 param[2] = (unsigned long)info;
mbed_official 0:fd0d7bdfcdc2 53 param[3] = (unsigned long)sizeof(XFINFO);
emilmont 2:143cac498751 54
mbed_official 0:fd0d7bdfcdc2 55 return __semihost(USR_XFFIND, param);
mbed_official 0:fd0d7bdfcdc2 56 }
mbed_official 0:fd0d7bdfcdc2 57
mbed_official 0:fd0d7bdfcdc2 58 #define OPEN_R 0
mbed_official 0:fd0d7bdfcdc2 59 #define OPEN_B 1
mbed_official 0:fd0d7bdfcdc2 60 #define OPEN_PLUS 2
mbed_official 0:fd0d7bdfcdc2 61 #define OPEN_W 4
mbed_official 0:fd0d7bdfcdc2 62 #define OPEN_A 8
mbed_official 0:fd0d7bdfcdc2 63 #define OPEN_INVALID -1
mbed_official 0:fd0d7bdfcdc2 64
mbed_official 0:fd0d7bdfcdc2 65 int posix_to_semihost_open_flags(int flags) {
mbed_official 0:fd0d7bdfcdc2 66 /* POSIX flags -> semihosting open mode */
mbed_official 0:fd0d7bdfcdc2 67 int openmode;
mbed_official 0:fd0d7bdfcdc2 68 if (flags & O_RDWR) {
mbed_official 0:fd0d7bdfcdc2 69 /* a plus mode */
mbed_official 0:fd0d7bdfcdc2 70 openmode = OPEN_PLUS;
mbed_official 0:fd0d7bdfcdc2 71 if (flags & O_APPEND) {
mbed_official 0:fd0d7bdfcdc2 72 openmode |= OPEN_A;
mbed_official 0:fd0d7bdfcdc2 73 } else if (flags & O_TRUNC) {
mbed_official 0:fd0d7bdfcdc2 74 openmode |= OPEN_W;
mbed_official 0:fd0d7bdfcdc2 75 } else {
mbed_official 0:fd0d7bdfcdc2 76 openmode |= OPEN_R;
mbed_official 0:fd0d7bdfcdc2 77 }
mbed_official 0:fd0d7bdfcdc2 78 } else if (flags & O_WRONLY) {
mbed_official 0:fd0d7bdfcdc2 79 /* write or append */
mbed_official 0:fd0d7bdfcdc2 80 if (flags & O_APPEND) {
mbed_official 0:fd0d7bdfcdc2 81 openmode = OPEN_A;
mbed_official 0:fd0d7bdfcdc2 82 } else {
mbed_official 0:fd0d7bdfcdc2 83 openmode = OPEN_W;
mbed_official 0:fd0d7bdfcdc2 84 }
mbed_official 0:fd0d7bdfcdc2 85 } else if (flags == O_RDONLY) {
mbed_official 0:fd0d7bdfcdc2 86 /* read mode */
mbed_official 0:fd0d7bdfcdc2 87 openmode = OPEN_R;
mbed_official 0:fd0d7bdfcdc2 88 } else {
mbed_official 0:fd0d7bdfcdc2 89 /* invalid flags */
mbed_official 0:fd0d7bdfcdc2 90 openmode = OPEN_INVALID;
mbed_official 0:fd0d7bdfcdc2 91 }
emilmont 2:143cac498751 92
mbed_official 0:fd0d7bdfcdc2 93 return openmode;
mbed_official 0:fd0d7bdfcdc2 94 }
mbed_official 0:fd0d7bdfcdc2 95
mbed_official 0:fd0d7bdfcdc2 96 FILEHANDLE local_file_open(const char* name, int flags) {
mbed_official 0:fd0d7bdfcdc2 97 int openmode = posix_to_semihost_open_flags(flags);
mbed_official 0:fd0d7bdfcdc2 98 if (openmode == OPEN_INVALID) {
mbed_official 0:fd0d7bdfcdc2 99 return (FILEHANDLE)NULL;
mbed_official 0:fd0d7bdfcdc2 100 }
emilmont 2:143cac498751 101
mbed_official 0:fd0d7bdfcdc2 102 FILEHANDLE fh = semihost_open(name, openmode);
mbed_official 0:fd0d7bdfcdc2 103 if (fh == -1) {
mbed_official 0:fd0d7bdfcdc2 104 return (FILEHANDLE)NULL;
mbed_official 0:fd0d7bdfcdc2 105 }
emilmont 2:143cac498751 106
mbed_official 0:fd0d7bdfcdc2 107 return fh;
mbed_official 0:fd0d7bdfcdc2 108 }
mbed_official 0:fd0d7bdfcdc2 109
mbed_official 0:fd0d7bdfcdc2 110 LocalFileHandle::LocalFileHandle(FILEHANDLE fh) {
mbed_official 0:fd0d7bdfcdc2 111 _fh = fh;
mbed_official 0:fd0d7bdfcdc2 112 pos = 0;
mbed_official 0:fd0d7bdfcdc2 113 }
mbed_official 0:fd0d7bdfcdc2 114
mbed_official 0:fd0d7bdfcdc2 115 int LocalFileHandle::close() {
mbed_official 0:fd0d7bdfcdc2 116 int retval = semihost_close(_fh);
mbed_official 0:fd0d7bdfcdc2 117 delete this;
mbed_official 0:fd0d7bdfcdc2 118 return retval;
mbed_official 0:fd0d7bdfcdc2 119 }
mbed_official 0:fd0d7bdfcdc2 120
mbed_official 0:fd0d7bdfcdc2 121 ssize_t LocalFileHandle::write(const void *buffer, size_t length) {
mbed_official 0:fd0d7bdfcdc2 122 ssize_t n = semihost_write(_fh, (const unsigned char*)buffer, length, 0); // number of characters not written
mbed_official 0:fd0d7bdfcdc2 123 n = length - n; // number of characters written
mbed_official 0:fd0d7bdfcdc2 124 pos += n;
mbed_official 0:fd0d7bdfcdc2 125 return n;
mbed_official 0:fd0d7bdfcdc2 126 }
mbed_official 0:fd0d7bdfcdc2 127
mbed_official 0:fd0d7bdfcdc2 128 ssize_t LocalFileHandle::read(void *buffer, size_t length) {
mbed_official 0:fd0d7bdfcdc2 129 ssize_t n = semihost_read(_fh, (unsigned char*)buffer, length, 0); // number of characters not read
mbed_official 0:fd0d7bdfcdc2 130 n = length - n; // number of characters read
mbed_official 0:fd0d7bdfcdc2 131 pos += n;
mbed_official 0:fd0d7bdfcdc2 132 return n;
mbed_official 0:fd0d7bdfcdc2 133 }
mbed_official 0:fd0d7bdfcdc2 134
mbed_official 0:fd0d7bdfcdc2 135 int LocalFileHandle::isatty() {
mbed_official 0:fd0d7bdfcdc2 136 return semihost_istty(_fh);
mbed_official 0:fd0d7bdfcdc2 137 }
mbed_official 0:fd0d7bdfcdc2 138
mbed_official 0:fd0d7bdfcdc2 139 off_t LocalFileHandle::lseek(off_t position, int whence) {
mbed_official 0:fd0d7bdfcdc2 140 if (whence == SEEK_CUR) {
mbed_official 0:fd0d7bdfcdc2 141 position += pos;
mbed_official 0:fd0d7bdfcdc2 142 } else if (whence == SEEK_END) {
mbed_official 0:fd0d7bdfcdc2 143 position += semihost_flen(_fh);
mbed_official 0:fd0d7bdfcdc2 144 } /* otherwise SEEK_SET, so position is fine */
emilmont 2:143cac498751 145
mbed_official 0:fd0d7bdfcdc2 146 /* Always seems to return -1, so just ignore for now. */
mbed_official 0:fd0d7bdfcdc2 147 semihost_seek(_fh, position);
mbed_official 0:fd0d7bdfcdc2 148 pos = position;
mbed_official 0:fd0d7bdfcdc2 149 return position;
mbed_official 0:fd0d7bdfcdc2 150 }
mbed_official 0:fd0d7bdfcdc2 151
mbed_official 0:fd0d7bdfcdc2 152 int LocalFileHandle::fsync() {
mbed_official 0:fd0d7bdfcdc2 153 return semihost_ensure(_fh);
mbed_official 0:fd0d7bdfcdc2 154 }
mbed_official 0:fd0d7bdfcdc2 155
mbed_official 0:fd0d7bdfcdc2 156 off_t LocalFileHandle::flen() {
mbed_official 0:fd0d7bdfcdc2 157 return semihost_flen(_fh);
mbed_official 0:fd0d7bdfcdc2 158 }
mbed_official 0:fd0d7bdfcdc2 159
mbed_official 0:fd0d7bdfcdc2 160 class LocalDirHandle : public DirHandle {
mbed_official 0:fd0d7bdfcdc2 161
mbed_official 0:fd0d7bdfcdc2 162 public:
mbed_official 0:fd0d7bdfcdc2 163 struct dirent cur_entry;
mbed_official 0:fd0d7bdfcdc2 164 XFINFO info;
emilmont 2:143cac498751 165
mbed_official 0:fd0d7bdfcdc2 166 LocalDirHandle() {
mbed_official 0:fd0d7bdfcdc2 167 info.fileID = 0;
mbed_official 0:fd0d7bdfcdc2 168 }
emilmont 2:143cac498751 169
mbed_official 0:fd0d7bdfcdc2 170 virtual int closedir() {
mbed_official 0:fd0d7bdfcdc2 171 delete this;
mbed_official 0:fd0d7bdfcdc2 172 return 0;
mbed_official 0:fd0d7bdfcdc2 173 }
emilmont 2:143cac498751 174
mbed_official 0:fd0d7bdfcdc2 175 virtual struct dirent *readdir() {
mbed_official 0:fd0d7bdfcdc2 176 if (xffind("*", &info)!=0) {
mbed_official 0:fd0d7bdfcdc2 177 return NULL;
mbed_official 0:fd0d7bdfcdc2 178 }
mbed_official 0:fd0d7bdfcdc2 179 memcpy(cur_entry.d_name, info.name, sizeof(info.name));
mbed_official 0:fd0d7bdfcdc2 180 return &cur_entry;
mbed_official 0:fd0d7bdfcdc2 181 }
emilmont 2:143cac498751 182
mbed_official 0:fd0d7bdfcdc2 183 virtual void rewinddir() {
mbed_official 0:fd0d7bdfcdc2 184 info.fileID = 0;
mbed_official 0:fd0d7bdfcdc2 185 }
emilmont 2:143cac498751 186
mbed_official 0:fd0d7bdfcdc2 187 virtual off_t telldir() {
mbed_official 0:fd0d7bdfcdc2 188 return info.fileID;
mbed_official 0:fd0d7bdfcdc2 189 }
emilmont 2:143cac498751 190
emilmont 2:143cac498751 191 virtual void seekdir(off_t offset) {
mbed_official 0:fd0d7bdfcdc2 192 info.fileID = offset;
mbed_official 0:fd0d7bdfcdc2 193 }
mbed_official 0:fd0d7bdfcdc2 194 };
mbed_official 0:fd0d7bdfcdc2 195
mbed_official 0:fd0d7bdfcdc2 196 FileHandle *LocalFileSystem::open(const char* name, int flags) {
mbed_official 0:fd0d7bdfcdc2 197 /* reject filenames with / in them */
mbed_official 0:fd0d7bdfcdc2 198 for (const char *tmp = name; *tmp; tmp++) {
mbed_official 0:fd0d7bdfcdc2 199 if (*tmp == '/') {
mbed_official 0:fd0d7bdfcdc2 200 return NULL;
mbed_official 0:fd0d7bdfcdc2 201 }
mbed_official 0:fd0d7bdfcdc2 202 }
emilmont 2:143cac498751 203
mbed_official 0:fd0d7bdfcdc2 204 int openmode = posix_to_semihost_open_flags(flags);
mbed_official 0:fd0d7bdfcdc2 205 if (openmode == OPEN_INVALID) {
mbed_official 0:fd0d7bdfcdc2 206 return NULL;
mbed_official 0:fd0d7bdfcdc2 207 }
emilmont 2:143cac498751 208
mbed_official 0:fd0d7bdfcdc2 209 FILEHANDLE fh = semihost_open(name, openmode);
mbed_official 0:fd0d7bdfcdc2 210 if (fh == -1) {
mbed_official 0:fd0d7bdfcdc2 211 return NULL;
mbed_official 0:fd0d7bdfcdc2 212 }
mbed_official 0:fd0d7bdfcdc2 213 return new LocalFileHandle(fh);
mbed_official 0:fd0d7bdfcdc2 214 }
mbed_official 0:fd0d7bdfcdc2 215
mbed_official 0:fd0d7bdfcdc2 216 int LocalFileSystem::remove(const char *filename) {
mbed_official 0:fd0d7bdfcdc2 217 return semihost_remove(filename);
mbed_official 0:fd0d7bdfcdc2 218 }
mbed_official 0:fd0d7bdfcdc2 219
mbed_official 0:fd0d7bdfcdc2 220 DirHandle *LocalFileSystem::opendir(const char *name) {
mbed_official 0:fd0d7bdfcdc2 221 return new LocalDirHandle();
mbed_official 0:fd0d7bdfcdc2 222 }
mbed_official 0:fd0d7bdfcdc2 223
mbed_official 0:fd0d7bdfcdc2 224 } // namespace mbed
mbed_official 0:fd0d7bdfcdc2 225
mbed_official 0:fd0d7bdfcdc2 226 #endif