Converge File object with std::fstream. Simplify LogFile.

LogFile no longer watches SD card presence and tries to open/close files dynamically.

firmware/application/ais_app.cpp

@@ -136,7 +136,7 @@ AISLogger::AISLogger(
 
 void AISLogger::on_packet(const ais::Packet& packet) {
 	// TODO: Unstuff here, not in baseband!
-	if( log_file.is_ready() ) {
+	if( log_file.is_open() ) {
 		std::string entry;
 		entry.reserve((packet.length() + 3) / 4);
 

firmware/application/capture_thread.hpp

@@ -110,7 +110,6 @@ public:
 private:
 	CaptureConfig config;
 	const std::string file_path;
-	File file;
 	static Thread* thread;
 
 	static msg_t static_fn(void* arg) {
@@ -119,7 +118,8 @@ private:
 	}
 
 	msg_t run() {
-		if( !file.open_for_writing(file_path) ) {
+		File file { file_path, File::openmode::out | File::openmode::binary | File::openmode::trunc };
+		if( !file.is_open() ) {
 			return false;
 		}
 
@@ -133,7 +133,7 @@ private:
 
 		while( !chThdShouldTerminate() ) {
 			if( stream.available() >= write_size ) {
-				if( !transfer(stream, write_buffer.get(), write_size) ) {
+				if( !transfer(stream, file, write_buffer.get(), write_size) ) {
 					return false; 
 				}
 			} else {
@@ -144,7 +144,7 @@ private:
 		return true;
 	}
 
-	bool transfer(StreamOutput& stream, uint8_t* const write_buffer, const size_t write_size) {
+	bool transfer(StreamOutput& stream, File& file, uint8_t* const write_buffer, const size_t write_size) {
 		bool success = false;
 
 		led_usb.on();

firmware/application/ert_app.cpp

@@ -66,7 +66,7 @@ ERTLogger::ERTLogger(
 }
 
 void ERTLogger::on_packet(const ert::Packet& packet) {
-	if( log_file.is_ready() ) {
+	if( log_file.is_open() ) {
 		const auto formatted = packet.symbols_formatted();
 		log_file.write_entry(packet.received_at(), formatted.data + "/" + formatted.errors);
 	}

firmware/application/file.cpp

@@ -23,40 +23,32 @@
 
 #include <algorithm>
 
-File::~File() {
-	close();
-}
-
-bool File::open_for_writing(const std::string& file_path) {
-	const auto open_result = f_open(&f, file_path.c_str(), FA_WRITE | FA_OPEN_ALWAYS);
-	return (open_result == FR_OK);
-}
-
-bool File::open_for_reading(const std::string& file_path) {
-	const auto open_result = f_open(&f, file_path.c_str(), FA_READ | FA_OPEN_EXISTING);
-	return (open_result == FR_OK);
-}
-
-bool File::open_for_append(const std::string& file_path) {
-	if( open_for_writing(file_path) ) {
-		const auto seek_result = f_lseek(&f, f_size(&f));
-		if( seek_result == FR_OK ) {
-			return true;
-		} else {
-			close();
-		}
+File::File(const std::string& filename, openmode mode) {
+	BYTE fatfs_mode = 0;
+	if( mode & openmode::in ) {
+		fatfs_mode |= FA_READ;
+	}
+	if( mode & openmode::out ) {
+		fatfs_mode |= FA_WRITE;
+	}
+	if( mode & openmode::trunc ) {
+		fatfs_mode |= FA_CREATE_ALWAYS;
+	}
+	if( mode & openmode::ate ) {
+		fatfs_mode |= FA_OPEN_ALWAYS;
 	}
 
-	return false;
+	if( f_open(&f, filename.c_str(), fatfs_mode) == FR_OK ) {
+		if( mode & openmode::ate ) {
+			if( f_lseek(&f, f_size(&f)) != FR_OK ) {
+				f_close(&f);
+			}
+		}
+	}
 }
 
-bool File::close() {
+File::~File() {
 	f_close(&f);
-	return true;
-}
-
-bool File::is_ready() {
-	return f_error(&f) == 0;
 }
 
 bool File::read(void* const data, const size_t bytes_to_read) {

firmware/application/file.hpp

@@ -32,14 +32,21 @@
 
 class File {
 public:
+	enum openmode {
+		app = 0x100,
+		binary = 0x200,
+		in = FA_READ,
+		out = FA_WRITE,
+		trunc = FA_CREATE_ALWAYS,
+		ate = FA_OPEN_ALWAYS,
+	};
+
+	File(const std::string& filename, openmode mode);
 	~File();
 
-	bool open_for_writing(const std::string& file_path);
-	bool open_for_reading(const std::string& file_path);
-	bool open_for_append(const std::string& file_path);
-	bool close();
-
-	bool is_ready();
+	bool is_open() const {
+		return f_error(&f) == 0;
+	}
 
 	bool read(void* const data, const size_t bytes_to_read);
 	bool write(const void* const data, const size_t bytes_to_write);
@@ -57,6 +64,10 @@ private:
 	FIL f;
 };
 
+inline constexpr File::openmode operator|(File::openmode a, File::openmode b) {
+	return File::openmode(static_cast<int>(a) | static_cast<int>(b));
+}
+
 std::string next_filename_stem_matching_pattern(const std::string& filename_stem_pattern);
 
 namespace std {

firmware/application/log_file.cpp

@@ -23,28 +23,14 @@
 
 #include "string_format.hpp"
 
-#include "lpc43xx_cpp.hpp"
-using namespace lpc43xx;
-
 LogFile::LogFile(
 	const std::string& file_path
-) : file_path { file_path }
+) : file { file_path, File::openmode::out | File::openmode::ate }
 {
-	file.open_for_append(file_path);
-
-	sd_card_status_signal_token = sd_card::status_signal += [this](const sd_card::Status status) {
-		this->on_sd_card_status(status);
-	};
 }
 
-LogFile::~LogFile() {
-	sd_card::status_signal -= sd_card_status_signal_token;
-
-	file.close();
-}
-
-bool LogFile::is_ready() {
-	return file.is_ready();
+bool LogFile::is_open() const {
+	return file.is_open();
 }
 
 bool LogFile::write_entry(const rtc::RTC& datetime, const std::string& entry) {
@@ -55,11 +41,3 @@ bool LogFile::write_entry(const rtc::RTC& datetime, const std::string& entry) {
 bool LogFile::write(const std::string& message) {
 	return file.puts(message) && file.sync();
 }
-
-void LogFile::on_sd_card_status(const sd_card::Status status) {
-	if( status == sd_card::Status::Mounted ) {
-		file.open_for_append(file_path);
-	} else {
-		file.close();		
-	}
-}

firmware/application/log_file.hpp

@@ -25,7 +25,6 @@
 #include <string>
 
 #include "file.hpp"
-#include "sd_card.hpp"
 
 #include "lpc43xx_cpp.hpp"
 using namespace lpc43xx;
@@ -33,22 +32,15 @@ using namespace lpc43xx;
 class LogFile {
 public:
 	LogFile(const std::string& file_path);
-	~LogFile();
 
-	bool is_ready();
+	bool is_open() const;
 
 	bool write_entry(const rtc::RTC& datetime, const std::string& entry);
 
 private:
-	const std::string file_path;
-	
 	File file;
 
-	SignalToken sd_card_status_signal_token;
-
 	bool write(const std::string& message);
-
-	void on_sd_card_status(const sd_card::Status status);
 };
 
 #endif/*__LOG_FILE_H__*/

firmware/application/tpms_app.cpp

@@ -62,7 +62,7 @@ TPMSLogger::TPMSLogger(
 void TPMSLogger::on_packet(const tpms::Packet& packet, const uint32_t target_frequency) {
 	const auto hex_formatted = packet.symbols_formatted();
 
-	if( log_file.is_ready() ) {
+	if( log_file.is_open() ) {
 		// TODO: function doesn't take uint64_t, so when >= 1<<32, weirdness will ensue!
 		const auto tuning_frequency_str = to_string_dec_uint(target_frequency, 10);
 

firmware/application/ui_record_view.cpp

@@ -107,8 +107,7 @@ void RecordView::stop() {
 }
 
 void RecordView::write_metadata_file(const std::string& filename) {
-	File file;
-	file.open_for_writing(filename);
+	File file { filename, File::openmode::out | File::openmode::trunc };
 	file.puts("sample_rate=" + to_string_dec_uint(sampling_rate) + "\n");
 	file.puts("center_frequency=" + to_string_dec_uint(receiver_model.tuning_frequency()) + "\n");
 }

firmware/application/ui_sd_card_debug.cpp

@@ -133,15 +133,15 @@ private:
 			return Result::FailHeap;
 		}
 
-		File file;
-		if( !file.open_for_writing(filename) ) {
+		File file { filename, File::openmode::out | File::openmode::binary | File::openmode::trunc };
+		if( !file.is_open() ) {
 			return Result::FailFileOpenWrite;
 		}
 
 		lfsr_word_t v = 1;
 
 		const halrtcnt_t test_start = halGetCounterValue();
-		while( !chThdShouldTerminate() && file.is_ready() && (_stats.write_bytes < bytes_to_write) ) {
+		while( !chThdShouldTerminate() && file.is_open() && (_stats.write_bytes < bytes_to_write) ) {
 			lfsr_fill(v,
 				reinterpret_cast<lfsr_word_t*>(buffer->data()),
 				sizeof(*buffer.get()) / sizeof(lfsr_word_t)
@@ -164,7 +164,7 @@ private:
 			}
 		}
 
-		file.close();
+		file.sync();
 		
 		const halrtcnt_t test_end = halGetCounterValue();
 		_stats.write_test_duration = test_end - test_start;
@@ -178,15 +178,15 @@ private:
 			return Result::FailHeap;
 		}
 
-		File file;
-		if( !file.open_for_reading(filename) ) {
+		File file { filename, File::openmode::in | File::openmode::binary };
+		if( !file.is_open() ) {
 			return Result::FailFileOpenRead;
 		}
 
 		lfsr_word_t v = 1;
 
 		const halrtcnt_t test_start = halGetCounterValue();
-		while( !chThdShouldTerminate() && file.is_ready() && (_stats.read_bytes < bytes_to_read) ) {
+		while( !chThdShouldTerminate() && file.is_open() && (_stats.read_bytes < bytes_to_read) ) {
 			const halrtcnt_t read_start = halGetCounterValue();
 			if( !file.read(buffer->data(), buffer->size()) ) {
 				break;
@@ -211,7 +211,7 @@ private:
 			}
 		}
 
-		file.close();
+		file.sync();
 		
 		const halrtcnt_t test_end = halGetCounterValue();
 		_stats.read_test_duration = test_end - test_start;

firmware/common/png_writer.cpp

@@ -51,9 +51,8 @@ static constexpr std::array<uint8_t, 12> png_iend { {
 
 PNGWriter::PNGWriter(
 	const std::string& filename
-)
+) : file { filename, File::openmode::out | File::openmode::binary | File::openmode::trunc }
 {
-	file.open_for_writing(filename);
 	file.write(png_file_header);
 	file.write(png_ihdr_screen_capture);