portapack-mayhem/firmware/application/freqman.cpp

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/*
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
* Copyright (C) 2016 Furrtek
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "freqman.hpp"
#include <algorithm>
std::vector<std::string> get_freqman_files() {
std::vector<std::string> file_list;
auto files = scan_root_files(u"FREQMAN", u"*.TXT");
for (auto file : files) {
std::string file_name = file.stem().string();
// don't propose tmp / hidden files in freqman's list
if (file_name.length() && file_name[0] != '.') {
file_list.emplace_back(file_name);
}
}
return file_list;
};
bool load_freqman_file(std::string& file_stem, freqman_db &db) {
File freqman_file;
size_t length, n = 0, file_position = 0;
char * pos;
char * line_start;
char * line_end;
std::string description;
rf::Frequency frequency_a, frequency_b;
char file_data[257];
freqman_entry_type type;
db.clear();
auto result = freqman_file.open("FREQMAN/" + file_stem + ".TXT");
if (result.is_valid())
return false;
while (1) {
// Read a 256 bytes block from file
freqman_file.seek(file_position);
memset(file_data, 0, 257);
auto read_size = freqman_file.read(file_data, 256);
if (read_size.is_error())
return false; // Read error
file_position += 256;
// Reset line_start to beginning of buffer
line_start = file_data;
if (!strstr(file_data, "f=") && !strstr(file_data, "a="))
break;
// Look for complete lines in buffer
while ((line_end = strstr(line_start, "\x0A"))) {
// Read frequency
pos = strstr(line_start, "f=");
frequency_b = 0;
type = SINGLE;
if (pos) {
pos += 2;
frequency_a = strtoll(pos, nullptr, 10);
} else {
// ...or range
pos = strstr(line_start, "a=");
if (pos) {
pos += 2;
frequency_a = strtoll(pos, nullptr, 10);
type = RANGE;
pos = strstr(line_start, "b=");
if (pos) {
pos += 2;
frequency_b = strtoll(pos, nullptr, 10);
} else
frequency_b = 0;
} else
frequency_a = 0;
}
// Read description until , or LF
pos = strstr(line_start, "d=");
if (pos) {
pos += 2;
length = std::min(strcspn(pos, ",\x0A"), (size_t)FREQMAN_DESC_MAX_LEN);
description = string(pos, length);
} else
description = "-";
db.push_back({ frequency_a, frequency_b, description, type });
n++;
if (n >= FREQMAN_MAX_PER_FILE) return true;
line_start = line_end + 1;
if (line_start - file_data >= 256) break;
}
if (read_size.value() != 256)
break; // End of file
// Restart at beginning of last incomplete line
file_position -= (file_data + 256 - line_start);
}
return true;
}
bool save_freqman_file(std::string& file_stem, freqman_db &db) {
File freqman_file;
std::string item_string;
rf::Frequency frequency_a, frequency_b;
if (!create_freqman_file(file_stem, freqman_file))
return false;
for (size_t n = 0; n < db.size(); n++) {
auto& entry = db[n];
frequency_a = entry.frequency_a;
if (entry.type == SINGLE) {
// Single
// TODO: Make to_string_dec_uint be able to return uint64_t's
// Please forgive me...
item_string = "f=" + to_string_dec_uint(frequency_a / 1000) + to_string_dec_uint(frequency_a % 1000UL, 3, '0');
} else {
// Range
frequency_b = entry.frequency_b;
item_string = "a=" + to_string_dec_uint(frequency_a / 1000) + to_string_dec_uint(frequency_a % 1000UL, 3, '0');
item_string += ",b=" + to_string_dec_uint(frequency_b / 1000) + to_string_dec_uint(frequency_b % 1000UL, 3, '0');
}
if (entry.description.size())
item_string += ",d=" + entry.description;
freqman_file.write_line(item_string);
}
return true;
}
bool create_freqman_file(std::string& file_stem, File& freqman_file) {
auto result = freqman_file.create("FREQMAN/" + file_stem + ".TXT");
if (result.is_valid())
return false;
return true;
}
std::string freqman_item_string(freqman_entry &entry, size_t max_length) {
std::string item_string;
if (entry.type == SINGLE) {
item_string = to_string_short_freq(entry.frequency_a) + "M: " + entry.description;
} else {
item_string = "Range: " + entry.description;
}
if (item_string.size() > max_length)
return item_string.substr(0, max_length - 3) + "...";
return item_string;
}