mirror of
https://github.com/eried/portapack-mayhem.git
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149 lines
3.8 KiB
C++
149 lines
3.8 KiB
C++
/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2016 Furrtek
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "freqman.hpp"
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#include <algorithm>
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std::vector<std::string> get_freqman_files() {
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std::vector<std::string> file_list;
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auto files = scan_root_files(u"FREQMAN", u"*.TXT");
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for (auto file : files) {
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file_list.emplace_back(file.stem().string());
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}
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return file_list;
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};
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bool load_freqman_file(std::string& file_stem, freqman_db &db) {
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File freqman_file;
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size_t length, n = 0, file_position = 0;
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char * pos;
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char * line_start;
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char * line_end;
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std::string description;
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rf::Frequency value;
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char file_data[256];
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db.entries.clear();
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auto result = freqman_file.open("FREQMAN/" + file_stem + ".TXT");
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if (result.is_valid())
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return false;
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while (1) {
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freqman_file.seek(file_position);
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memset(file_data, 0, 256);
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auto read_size = freqman_file.read(file_data, 256);
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if (read_size.is_error())
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return false; // Read error
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file_position += sizeof(file_data);
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line_start = file_data;
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pos = strstr(file_data, "f=");
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if (!pos) break;
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// Look for complete lines in buffer
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while ((line_end = strstr(line_start, "\x0A"))) {
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// Read frequency
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pos = strstr(line_start, "f=");
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if (pos) {
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pos += 2;
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value = strtoll(pos, nullptr, 10);
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} else
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value = 0;
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// Read description until , or LF
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pos = strstr(line_start, "d=");
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if (pos) {
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pos += 2;
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length = std::min(strcspn(pos, ",\x0A"), (size_t)FREQMAN_DESC_MAX_LEN);
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description = string(pos, length);
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} else
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description = "-";
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db.entries.push_back({ value, "", description });
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n++;
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if (n >= FREQMAN_MAX_PER_FILE) return true;
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line_start = line_end + 1;
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}
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if (read_size.value() != sizeof(file_data))
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return true; // End of file
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file_position -= (file_data + sizeof(file_data) - line_start);
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}
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return true;
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}
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bool save_freqman_file(std::string& file_stem, freqman_db &db) {
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File freqman_file;
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std::string item_string;
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rf::Frequency f;
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if (!create_freqman_file(file_stem, freqman_file))
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return false;
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for (size_t n = 0; n < db.entries.size(); n++) {
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f = db.entries[n].value;
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item_string = "f=" + to_string_dec_uint(f / 1000) + to_string_dec_uint(f % 1000UL, 3, '0'); // Please forgive me
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if (db.entries[n].description.size())
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item_string += ",d=" + db.entries[n].description;
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freqman_file.write_line(item_string);
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}
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return true;
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}
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bool create_freqman_file(std::string& file_stem, File& freqman_file) {
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auto result = freqman_file.create("FREQMAN/" + file_stem + ".TXT");
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if (result.is_valid())
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return false;
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return true;
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}
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std::string freqman_item_string(freqman_entry &entry, size_t max_length) {
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std::string item_string, frequency_str, description;
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rf::Frequency value;
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value = entry.value;
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entry.frequency_str = to_string_dec_int(value / 1000000, 4) + "." +
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to_string_dec_int((value / 100) % 10000, 4, '0');
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item_string = entry.frequency_str + "M: " + entry.description;
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if (entry.description.size() > max_length)
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return item_string.substr(0, max_length - 3) + "...";
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return item_string;
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}
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