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Diffstat (limited to 'include/libcamera/base/file.h')
-rw-r--r-- | include/libcamera/base/file.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/include/libcamera/base/file.h b/include/libcamera/base/file.h new file mode 100644 index 00000000..5cd98579 --- /dev/null +++ b/include/libcamera/base/file.h @@ -0,0 +1,79 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Copyright (C) 2020, Google Inc. + * + * file.h - File I/O operations + */ +#ifndef __LIBCAMERA_BASE_FILE_H__ +#define __LIBCAMERA_BASE_FILE_H__ + +#include <sys/types.h> + +#include <map> +#include <string> + +#include <libcamera/base/class.h> + +#include <libcamera/span.h> + +namespace libcamera { + +class File +{ +public: + enum MapFlag { + MapNoOption = 0, + MapPrivate = (1 << 0), + }; + + enum OpenMode { + NotOpen = 0, + ReadOnly = (1 << 0), + WriteOnly = (1 << 1), + ReadWrite = ReadOnly | WriteOnly, + }; + + File(const std::string &name); + File(); + ~File(); + + const std::string &fileName() const { return name_; } + void setFileName(const std::string &name); + bool exists() const; + + bool open(OpenMode mode); + bool isOpen() const { return fd_ != -1; } + OpenMode openMode() const { return mode_; } + void close(); + + int error() const { return error_; } + ssize_t size() const; + + off_t pos() const; + off_t seek(off_t pos); + + ssize_t read(const Span<uint8_t> &data); + ssize_t write(const Span<const uint8_t> &data); + + Span<uint8_t> map(off_t offset = 0, ssize_t size = -1, + MapFlag flags = MapNoOption); + bool unmap(uint8_t *addr); + + static bool exists(const std::string &name); + +private: + LIBCAMERA_DISABLE_COPY(File) + + void unmapAll(); + + std::string name_; + int fd_; + OpenMode mode_; + + int error_; + std::map<void *, size_t> maps_; +}; + +} /* namespace libcamera */ + +#endif /* __LIBCAMERA_BASE_FILE_H__ */ |