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Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/mbed/common/LocalFileSystem.cpp')
| -rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/mbed/common/LocalFileSystem.cpp | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/common/LocalFileSystem.cpp b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/common/LocalFileSystem.cpp new file mode 100644 index 0000000000..9505d91a9a --- /dev/null +++ b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/common/LocalFileSystem.cpp @@ -0,0 +1,223 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include "LocalFileSystem.h" + +#if DEVICE_LOCALFILESYSTEM + +#include "semihost_api.h" +#include <string.h> +#include <stdio.h> + +namespace mbed { + +/* Extension to FINFO type defined in RTL.h (in Keil RL) - adds 'create time'. */ +typedef struct { + unsigned char hr; /* Hours [0..23] */ + unsigned char min; /* Minutes [0..59] */ + unsigned char sec; /* Seconds [0..59] */ + unsigned char day; /* Day [1..31] */ + unsigned char mon; /* Month [1..12] */ + unsigned short year; /* Year [1980..2107] */ +} FTIME; + +typedef struct { /* File Search info record */ + char name[32]; /* File name */ + long size; /* File size in bytes */ + int fileID; /* System File Identification */ + FTIME create_time; /* Date & time file was created */ + FTIME write_time; /* Date & time of last write */ +} XFINFO; + +#define RESERVED_FOR_USER_APPLICATIONS (0x100) /* 0x100 - 0x1ff */ +#define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0) + +static int xffind (const char *pattern, XFINFO *info) { + unsigned param[4]; + + param[0] = (unsigned long)pattern; + param[1] = (unsigned long)strlen(pattern); + param[2] = (unsigned long)info; + param[3] = (unsigned long)sizeof(XFINFO); + + return __semihost(USR_XFFIND, param); +} + +#define OPEN_R 0 +#define OPEN_B 1 +#define OPEN_PLUS 2 +#define OPEN_W 4 +#define OPEN_A 8 +#define OPEN_INVALID -1 + +int posix_to_semihost_open_flags(int flags) { + /* POSIX flags -> semihosting open mode */ + int openmode; + if (flags & O_RDWR) { + /* a plus mode */ + openmode = OPEN_PLUS; + if (flags & O_APPEND) { + openmode |= OPEN_A; + } else if (flags & O_TRUNC) { + openmode |= OPEN_W; + } else { + openmode |= OPEN_R; + } + } else if (flags & O_WRONLY) { + /* write or append */ + if (flags & O_APPEND) { + openmode = OPEN_A; + } else { + openmode = OPEN_W; + } + } else if (flags == O_RDONLY) { + /* read mode */ + openmode = OPEN_R; + } else { + /* invalid flags */ + openmode = OPEN_INVALID; + } + + return openmode; +} + +FILEHANDLE local_file_open(const char* name, int flags) { + int openmode = posix_to_semihost_open_flags(flags); + if (openmode == OPEN_INVALID) { + return (FILEHANDLE)NULL; + } + + FILEHANDLE fh = semihost_open(name, openmode); + if (fh == -1) { + return (FILEHANDLE)NULL; + } + + return fh; +} + +LocalFileHandle::LocalFileHandle(FILEHANDLE fh) : _fh(fh), pos(0) { +} + +int LocalFileHandle::close() { + int retval = semihost_close(_fh); + delete this; + return retval; +} + +ssize_t LocalFileHandle::write(const void *buffer, size_t length) { + ssize_t n = semihost_write(_fh, (const unsigned char*)buffer, length, 0); // number of characters not written + n = length - n; // number of characters written + pos += n; + return n; +} + +ssize_t LocalFileHandle::read(void *buffer, size_t length) { + ssize_t n = semihost_read(_fh, (unsigned char*)buffer, length, 0); // number of characters not read + n = length - n; // number of characters read + pos += n; + return n; +} + +int LocalFileHandle::isatty() { + return semihost_istty(_fh); +} + +off_t LocalFileHandle::lseek(off_t position, int whence) { + if (whence == SEEK_CUR) { + position += pos; + } else if (whence == SEEK_END) { + position += semihost_flen(_fh); + } /* otherwise SEEK_SET, so position is fine */ + + /* Always seems to return -1, so just ignore for now. */ + semihost_seek(_fh, position); + pos = position; + return position; +} + +int LocalFileHandle::fsync() { + return semihost_ensure(_fh); +} + +off_t LocalFileHandle::flen() { + return semihost_flen(_fh); +} + +class LocalDirHandle : public DirHandle { + +public: + struct dirent cur_entry; + XFINFO info; + + LocalDirHandle() : cur_entry(), info() { + } + + virtual int closedir() { + delete this; + return 0; + } + + virtual struct dirent *readdir() { + if (xffind("*", &info)!=0) { + return NULL; + } + memcpy(cur_entry.d_name, info.name, sizeof(info.name)); + return &cur_entry; + } + + virtual void rewinddir() { + info.fileID = 0; + } + + virtual off_t telldir() { + return info.fileID; + } + + virtual void seekdir(off_t offset) { + info.fileID = offset; + } +}; + +FileHandle *LocalFileSystem::open(const char* name, int flags) { + /* reject filenames with / in them */ + for (const char *tmp = name; *tmp; tmp++) { + if (*tmp == '/') { + return NULL; + } + } + + int openmode = posix_to_semihost_open_flags(flags); + if (openmode == OPEN_INVALID) { + return NULL; + } + + FILEHANDLE fh = semihost_open(name, openmode); + if (fh == -1) { + return NULL; + } + return new LocalFileHandle(fh); +} + +int LocalFileSystem::remove(const char *filename) { + return semihost_remove(filename); +} + +DirHandle *LocalFileSystem::opendir(const char *name) { + return new LocalDirHandle(); +} + +} // namespace mbed + +#endif |