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Add file reader (#1155)

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* Add file reader
* Add a simple test example of parsing settings.
* Use new FileLineReader to parse Glass presets
* Trim CRLF from Glass preset name
This commit is contained in:
Kyle Reed 2023-06-15 00:45:13 -07:00 • committed by GitHub
parent a5c7eb2fbc
commit 34fefd1cad
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11 changed files with 659 additions and 325 deletions
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80
firmware/application/apps/ui_looking_glass_app.cpp
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@ -22,6 +22,8 @@
*/
#include "ui_looking_glass_app.hpp"
#include "file_reader.hpp"
#include "string_format.hpp"
using namespace portapack;
@ -519,70 +521,42 @@ GlassView::GlassView(
void GlassView::load_Presets() {
File presets_file;
auto result = presets_file.open("LOOKINGGLASS/PRESETS.TXT");
presets_db.clear(); // Start with fresh db
if (result.is_valid()) {
presets_Default(); // There is no txt, store a default range
} else {
std::string line; // There is a txt file
char one_char[1]; // Read it char by char
for (size_t pointer = 0; pointer < presets_file.size(); pointer++) {
presets_file.seek(pointer);
presets_file.read(one_char, 1);
if ((int)one_char[0] > 31) { // ascii space upwards
line += one_char[0]; // Add it to the textline
} else if (one_char[0] == '\n') { // New Line
txtline_process(line); // make sense of this textline
line.clear(); // Ready for next textline
}
auto error = presets_file.open("LOOKINGGLASS/PRESETS.TXT");
presets_db.clear();
if (!error) {
auto reader = FileLineReader(presets_file);
for (const auto& line : reader) {
if (line.length() == 0 || line[0] == '#')
continue;
auto cols = split_string(line, ',');
if (cols.size() != 3)
continue;
// TODO: add some conversion helpers that take string_view.
presets_db.emplace_back(preset_entry{
std::stoi(std::string{cols[0]}),
std::stoi(std::string{cols[1]}),
trimr(std::string{cols[2]})});
}
if (line.length() > 0)
txtline_process(line); // Last line had no newline at end ?
if (!presets_db.size())
presets_Default(); // no antenna on txt, use default
}
// Couldn't load any from the file, load a default instead.
if (presets_db.empty())
presets_Default();
populate_Presets();
}
void GlassView::txtline_process(std::string& line) {
if (line.find("#") != std::string::npos)
return; // Line is just a comment
size_t comma = line.find(","); // Get first comma position
if (comma == std::string::npos)
return; // No comma at all
size_t previous = 0;
preset_entry new_preset;
new_preset.min = std::stoi(line.substr(0, comma));
if (!new_preset.min)
return; // No frequency!
previous = comma + 1;
comma = line.find(",", previous); // Search for next delimiter
if (comma == std::string::npos)
return; // No comma at all
new_preset.max = std::stoi(line.substr(previous, comma - previous));
if (!new_preset.max)
return; // No frequency!
new_preset.label = line.substr(comma + 1);
if (new_preset.label.size() == 0)
return; // No label ?
presets_db.push_back(new_preset); // Add this preset.
}
void GlassView::populate_Presets() {
using option_t = std::pair<std::string, int32_t>;
using options_t = std::vector<option_t>;
options_t entries;
for (preset_entry preset : presets_db) { // go thru all available presets
for (const auto& preset : presets_db)
entries.emplace_back(preset.label, entries.size());
}
range_presets.set_options(entries);
}