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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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

cpp/LocalFileSystem.cpp@0:fd0d7bdfcdc2, 2012-11-20 (annotated)

Committer:
mbed_official
Date:
Tue Nov 20 17:24:08 2012 +0000
Revision:
0:fd0d7bdfcdc2
Child:
2:143cac498751
mbed sources

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:fd0d7bdfcdc2 1 /* mbed Microcontroller Library
mbed_official 0:fd0d7bdfcdc2 2 * Copyright (c) 2006-2012 ARM Limited
mbed_official 0:fd0d7bdfcdc2 3 *
mbed_official 0:fd0d7bdfcdc2 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
mbed_official 0:fd0d7bdfcdc2 5 * of this software and associated documentation files (the "Software"), to deal
mbed_official 0:fd0d7bdfcdc2 6 * in the Software without restriction, including without limitation the rights
mbed_official 0:fd0d7bdfcdc2 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
mbed_official 0:fd0d7bdfcdc2 8 * copies of the Software, and to permit persons to whom the Software is
mbed_official 0:fd0d7bdfcdc2 9 * furnished to do so, subject to the following conditions:
mbed_official 0:fd0d7bdfcdc2 10 *
mbed_official 0:fd0d7bdfcdc2 11 * The above copyright notice and this permission notice shall be included in
mbed_official 0:fd0d7bdfcdc2 12 * all copies or substantial portions of the Software.
mbed_official 0:fd0d7bdfcdc2 13 *
mbed_official 0:fd0d7bdfcdc2 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
mbed_official 0:fd0d7bdfcdc2 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
mbed_official 0:fd0d7bdfcdc2 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
mbed_official 0:fd0d7bdfcdc2 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
mbed_official 0:fd0d7bdfcdc2 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mbed_official 0:fd0d7bdfcdc2 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
mbed_official 0:fd0d7bdfcdc2 20 * SOFTWARE.
mbed_official 0:fd0d7bdfcdc2 21 */
mbed_official 0:fd0d7bdfcdc2 22 #include "LocalFileSystem.h"
mbed_official 0:fd0d7bdfcdc2 23
mbed_official 0:fd0d7bdfcdc2 24 #if DEVICE_LOCALFILESYSTEM
mbed_official 0:fd0d7bdfcdc2 25
mbed_official 0:fd0d7bdfcdc2 26 #include "semihost_api.h"
mbed_official 0:fd0d7bdfcdc2 27 #include <string.h>
mbed_official 0:fd0d7bdfcdc2 28 #include <stdio.h>
mbed_official 0:fd0d7bdfcdc2 29
mbed_official 0:fd0d7bdfcdc2 30 namespace mbed {
mbed_official 0:fd0d7bdfcdc2 31
mbed_official 0:fd0d7bdfcdc2 32 /* Extension to FINFO type defined in RTL.h (in Keil RL) - adds 'create time'. */
mbed_official 0:fd0d7bdfcdc2 33 typedef struct {
mbed_official 0:fd0d7bdfcdc2 34 unsigned char hr; /* Hours [0..23] */
mbed_official 0:fd0d7bdfcdc2 35 unsigned char min; /* Minutes [0..59] */
mbed_official 0:fd0d7bdfcdc2 36 unsigned char sec; /* Seconds [0..59] */
mbed_official 0:fd0d7bdfcdc2 37 unsigned char day; /* Day [1..31] */
mbed_official 0:fd0d7bdfcdc2 38 unsigned char mon; /* Month [1..12] */
mbed_official 0:fd0d7bdfcdc2 39 unsigned short year; /* Year [1980..2107] */
mbed_official 0:fd0d7bdfcdc2 40 } FTIME;
mbed_official 0:fd0d7bdfcdc2 41
mbed_official 0:fd0d7bdfcdc2 42 typedef struct { /* File Search info record */
mbed_official 0:fd0d7bdfcdc2 43 char name[32]; /* File name */
mbed_official 0:fd0d7bdfcdc2 44 long size; /* File size in bytes */
mbed_official 0:fd0d7bdfcdc2 45 int fileID; /* System File Identification */
mbed_official 0:fd0d7bdfcdc2 46 FTIME create_time; /* Date & time file was created */
mbed_official 0:fd0d7bdfcdc2 47 FTIME write_time; /* Date & time of last write */
mbed_official 0:fd0d7bdfcdc2 48 } XFINFO;
mbed_official 0:fd0d7bdfcdc2 49
mbed_official 0:fd0d7bdfcdc2 50 #define RESERVED_FOR_USER_APPLICATIONS (0x100) /* 0x100 - 0x1ff */
mbed_official 0:fd0d7bdfcdc2 51 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
mbed_official 0:fd0d7bdfcdc2 52
mbed_official 0:fd0d7bdfcdc2 53 static int xffind (const char *pattern, XFINFO *info) {
mbed_official 0:fd0d7bdfcdc2 54 unsigned param[4];
mbed_official 0:fd0d7bdfcdc2 55
mbed_official 0:fd0d7bdfcdc2 56 param[0] = (unsigned long)pattern;
mbed_official 0:fd0d7bdfcdc2 57 param[1] = (unsigned long)strlen(pattern);
mbed_official 0:fd0d7bdfcdc2 58 param[2] = (unsigned long)info;
mbed_official 0:fd0d7bdfcdc2 59 param[3] = (unsigned long)sizeof(XFINFO);
mbed_official 0:fd0d7bdfcdc2 60
mbed_official 0:fd0d7bdfcdc2 61 return __semihost(USR_XFFIND, param);
mbed_official 0:fd0d7bdfcdc2 62 }
mbed_official 0:fd0d7bdfcdc2 63
mbed_official 0:fd0d7bdfcdc2 64 #define OPEN_R 0
mbed_official 0:fd0d7bdfcdc2 65 #define OPEN_B 1
mbed_official 0:fd0d7bdfcdc2 66 #define OPEN_PLUS 2
mbed_official 0:fd0d7bdfcdc2 67 #define OPEN_W 4
mbed_official 0:fd0d7bdfcdc2 68 #define OPEN_A 8
mbed_official 0:fd0d7bdfcdc2 69 #define OPEN_INVALID -1
mbed_official 0:fd0d7bdfcdc2 70
mbed_official 0:fd0d7bdfcdc2 71 int posix_to_semihost_open_flags(int flags) {
mbed_official 0:fd0d7bdfcdc2 72 /* POSIX flags -> semihosting open mode */
mbed_official 0:fd0d7bdfcdc2 73 int openmode;
mbed_official 0:fd0d7bdfcdc2 74 if (flags & O_RDWR) {
mbed_official 0:fd0d7bdfcdc2 75 /* a plus mode */
mbed_official 0:fd0d7bdfcdc2 76 openmode = OPEN_PLUS;
mbed_official 0:fd0d7bdfcdc2 77 if (flags & O_APPEND) {
mbed_official 0:fd0d7bdfcdc2 78 openmode |= OPEN_A;
mbed_official 0:fd0d7bdfcdc2 79 } else if (flags & O_TRUNC) {
mbed_official 0:fd0d7bdfcdc2 80 openmode |= OPEN_W;
mbed_official 0:fd0d7bdfcdc2 81 } else {
mbed_official 0:fd0d7bdfcdc2 82 openmode |= OPEN_R;
mbed_official 0:fd0d7bdfcdc2 83 }
mbed_official 0:fd0d7bdfcdc2 84 } else if (flags & O_WRONLY) {
mbed_official 0:fd0d7bdfcdc2 85 /* write or append */
mbed_official 0:fd0d7bdfcdc2 86 if (flags & O_APPEND) {
mbed_official 0:fd0d7bdfcdc2 87 openmode = OPEN_A;
mbed_official 0:fd0d7bdfcdc2 88 } else {
mbed_official 0:fd0d7bdfcdc2 89 openmode = OPEN_W;
mbed_official 0:fd0d7bdfcdc2 90 }
mbed_official 0:fd0d7bdfcdc2 91 } else if (flags == O_RDONLY) {
mbed_official 0:fd0d7bdfcdc2 92 /* read mode */
mbed_official 0:fd0d7bdfcdc2 93 openmode = OPEN_R;
mbed_official 0:fd0d7bdfcdc2 94 } else {
mbed_official 0:fd0d7bdfcdc2 95 /* invalid flags */
mbed_official 0:fd0d7bdfcdc2 96 openmode = OPEN_INVALID;
mbed_official 0:fd0d7bdfcdc2 97 }
mbed_official 0:fd0d7bdfcdc2 98
mbed_official 0:fd0d7bdfcdc2 99 return openmode;
mbed_official 0:fd0d7bdfcdc2 100 }
mbed_official 0:fd0d7bdfcdc2 101
mbed_official 0:fd0d7bdfcdc2 102 FILEHANDLE local_file_open(const char* name, int flags) {
mbed_official 0:fd0d7bdfcdc2 103 int openmode = posix_to_semihost_open_flags(flags);
mbed_official 0:fd0d7bdfcdc2 104 if (openmode == OPEN_INVALID) {
mbed_official 0:fd0d7bdfcdc2 105 return (FILEHANDLE)NULL;
mbed_official 0:fd0d7bdfcdc2 106 }
mbed_official 0:fd0d7bdfcdc2 107
mbed_official 0:fd0d7bdfcdc2 108 FILEHANDLE fh = semihost_open(name, openmode);
mbed_official 0:fd0d7bdfcdc2 109 if (fh == -1) {
mbed_official 0:fd0d7bdfcdc2 110 return (FILEHANDLE)NULL;
mbed_official 0:fd0d7bdfcdc2 111 }
mbed_official 0:fd0d7bdfcdc2 112
mbed_official 0:fd0d7bdfcdc2 113 return fh;
mbed_official 0:fd0d7bdfcdc2 114 }
mbed_official 0:fd0d7bdfcdc2 115
mbed_official 0:fd0d7bdfcdc2 116 LocalFileHandle::LocalFileHandle(FILEHANDLE fh) {
mbed_official 0:fd0d7bdfcdc2 117 _fh = fh;
mbed_official 0:fd0d7bdfcdc2 118 pos = 0;
mbed_official 0:fd0d7bdfcdc2 119 }
mbed_official 0:fd0d7bdfcdc2 120
mbed_official 0:fd0d7bdfcdc2 121 int LocalFileHandle::close() {
mbed_official 0:fd0d7bdfcdc2 122 int retval = semihost_close(_fh);
mbed_official 0:fd0d7bdfcdc2 123 delete this;
mbed_official 0:fd0d7bdfcdc2 124 return retval;
mbed_official 0:fd0d7bdfcdc2 125 }
mbed_official 0:fd0d7bdfcdc2 126
mbed_official 0:fd0d7bdfcdc2 127 ssize_t LocalFileHandle::write(const void *buffer, size_t length) {
mbed_official 0:fd0d7bdfcdc2 128 ssize_t n = semihost_write(_fh, (const unsigned char*)buffer, length, 0); // number of characters not written
mbed_official 0:fd0d7bdfcdc2 129 n = length - n; // number of characters written
mbed_official 0:fd0d7bdfcdc2 130 pos += n;
mbed_official 0:fd0d7bdfcdc2 131 return n;
mbed_official 0:fd0d7bdfcdc2 132 }
mbed_official 0:fd0d7bdfcdc2 133
mbed_official 0:fd0d7bdfcdc2 134 ssize_t LocalFileHandle::read(void *buffer, size_t length) {
mbed_official 0:fd0d7bdfcdc2 135 ssize_t n = semihost_read(_fh, (unsigned char*)buffer, length, 0); // number of characters not read
mbed_official 0:fd0d7bdfcdc2 136 n = length - n; // number of characters read
mbed_official 0:fd0d7bdfcdc2 137 pos += n;
mbed_official 0:fd0d7bdfcdc2 138 return n;
mbed_official 0:fd0d7bdfcdc2 139 }
mbed_official 0:fd0d7bdfcdc2 140
mbed_official 0:fd0d7bdfcdc2 141 int LocalFileHandle::isatty() {
mbed_official 0:fd0d7bdfcdc2 142 return semihost_istty(_fh);
mbed_official 0:fd0d7bdfcdc2 143 }
mbed_official 0:fd0d7bdfcdc2 144
mbed_official 0:fd0d7bdfcdc2 145 off_t LocalFileHandle::lseek(off_t position, int whence) {
mbed_official 0:fd0d7bdfcdc2 146 if (whence == SEEK_CUR) {
mbed_official 0:fd0d7bdfcdc2 147 position += pos;
mbed_official 0:fd0d7bdfcdc2 148 } else if (whence == SEEK_END) {
mbed_official 0:fd0d7bdfcdc2 149 position += semihost_flen(_fh);
mbed_official 0:fd0d7bdfcdc2 150 } /* otherwise SEEK_SET, so position is fine */
mbed_official 0:fd0d7bdfcdc2 151
mbed_official 0:fd0d7bdfcdc2 152 /* Always seems to return -1, so just ignore for now. */
mbed_official 0:fd0d7bdfcdc2 153 semihost_seek(_fh, position);
mbed_official 0:fd0d7bdfcdc2 154 pos = position;
mbed_official 0:fd0d7bdfcdc2 155 return position;
mbed_official 0:fd0d7bdfcdc2 156 }
mbed_official 0:fd0d7bdfcdc2 157
mbed_official 0:fd0d7bdfcdc2 158 int LocalFileHandle::fsync() {
mbed_official 0:fd0d7bdfcdc2 159 return semihost_ensure(_fh);
mbed_official 0:fd0d7bdfcdc2 160 }
mbed_official 0:fd0d7bdfcdc2 161
mbed_official 0:fd0d7bdfcdc2 162 off_t LocalFileHandle::flen() {
mbed_official 0:fd0d7bdfcdc2 163 return semihost_flen(_fh);
mbed_official 0:fd0d7bdfcdc2 164 }
mbed_official 0:fd0d7bdfcdc2 165
mbed_official 0:fd0d7bdfcdc2 166 class LocalDirHandle : public DirHandle {
mbed_official 0:fd0d7bdfcdc2 167
mbed_official 0:fd0d7bdfcdc2 168 public:
mbed_official 0:fd0d7bdfcdc2 169 struct dirent cur_entry;
mbed_official 0:fd0d7bdfcdc2 170 XFINFO info;
mbed_official 0:fd0d7bdfcdc2 171
mbed_official 0:fd0d7bdfcdc2 172 LocalDirHandle() {
mbed_official 0:fd0d7bdfcdc2 173 info.fileID = 0;
mbed_official 0:fd0d7bdfcdc2 174 }
mbed_official 0:fd0d7bdfcdc2 175
mbed_official 0:fd0d7bdfcdc2 176 virtual int closedir() {
mbed_official 0:fd0d7bdfcdc2 177 delete this;
mbed_official 0:fd0d7bdfcdc2 178 return 0;
mbed_official 0:fd0d7bdfcdc2 179 }
mbed_official 0:fd0d7bdfcdc2 180
mbed_official 0:fd0d7bdfcdc2 181 virtual struct dirent *readdir() {
mbed_official 0:fd0d7bdfcdc2 182 if (xffind("*", &info)!=0) {
mbed_official 0:fd0d7bdfcdc2 183 return NULL;
mbed_official 0:fd0d7bdfcdc2 184 }
mbed_official 0:fd0d7bdfcdc2 185 memcpy(cur_entry.d_name, info.name, sizeof(info.name));
mbed_official 0:fd0d7bdfcdc2 186 return &cur_entry;
mbed_official 0:fd0d7bdfcdc2 187 }
mbed_official 0:fd0d7bdfcdc2 188
mbed_official 0:fd0d7bdfcdc2 189 virtual void rewinddir() {
mbed_official 0:fd0d7bdfcdc2 190 info.fileID = 0;
mbed_official 0:fd0d7bdfcdc2 191 }
mbed_official 0:fd0d7bdfcdc2 192
mbed_official 0:fd0d7bdfcdc2 193 virtual off_t telldir() {
mbed_official 0:fd0d7bdfcdc2 194 return info.fileID;
mbed_official 0:fd0d7bdfcdc2 195 }
mbed_official 0:fd0d7bdfcdc2 196
mbed_official 0:fd0d7bdfcdc2 197 virtual void seekdir(off_t offset) {
mbed_official 0:fd0d7bdfcdc2 198 info.fileID = offset;
mbed_official 0:fd0d7bdfcdc2 199 }
mbed_official 0:fd0d7bdfcdc2 200 };
mbed_official 0:fd0d7bdfcdc2 201
mbed_official 0:fd0d7bdfcdc2 202 FileHandle *LocalFileSystem::open(const char* name, int flags) {
mbed_official 0:fd0d7bdfcdc2 203 /* reject filenames with / in them */
mbed_official 0:fd0d7bdfcdc2 204 for (const char *tmp = name; *tmp; tmp++) {
mbed_official 0:fd0d7bdfcdc2 205 if (*tmp == '/') {
mbed_official 0:fd0d7bdfcdc2 206 return NULL;
mbed_official 0:fd0d7bdfcdc2 207 }
mbed_official 0:fd0d7bdfcdc2 208 }
mbed_official 0:fd0d7bdfcdc2 209
mbed_official 0:fd0d7bdfcdc2 210 int openmode = posix_to_semihost_open_flags(flags);
mbed_official 0:fd0d7bdfcdc2 211 if (openmode == OPEN_INVALID) {
mbed_official 0:fd0d7bdfcdc2 212 return NULL;
mbed_official 0:fd0d7bdfcdc2 213 }
mbed_official 0:fd0d7bdfcdc2 214
mbed_official 0:fd0d7bdfcdc2 215 FILEHANDLE fh = semihost_open(name, openmode);
mbed_official 0:fd0d7bdfcdc2 216 if (fh == -1) {
mbed_official 0:fd0d7bdfcdc2 217 return NULL;
mbed_official 0:fd0d7bdfcdc2 218 }
mbed_official 0:fd0d7bdfcdc2 219 return new LocalFileHandle(fh);
mbed_official 0:fd0d7bdfcdc2 220 }
mbed_official 0:fd0d7bdfcdc2 221
mbed_official 0:fd0d7bdfcdc2 222 int LocalFileSystem::remove(const char *filename) {
mbed_official 0:fd0d7bdfcdc2 223 return semihost_remove(filename);
mbed_official 0:fd0d7bdfcdc2 224 }
mbed_official 0:fd0d7bdfcdc2 225
mbed_official 0:fd0d7bdfcdc2 226 DirHandle *LocalFileSystem::opendir(const char *name) {
mbed_official 0:fd0d7bdfcdc2 227 return new LocalDirHandle();
mbed_official 0:fd0d7bdfcdc2 228 }
mbed_official 0:fd0d7bdfcdc2 229
mbed_official 0:fd0d7bdfcdc2 230 } // namespace mbed
mbed_official 0:fd0d7bdfcdc2 231
mbed_official 0:fd0d7bdfcdc2 232 #endif