portapack-mayhem/firmware/application/string_format.cpp
Kyle Reed d29826e6f2
Update playlist file parsing, reduce allocs (#1157)
* Update playlist file parsing, reduce allocs
* Cleanup, move impl to cpp
2023-06-15 22:15:26 +02:00

299 lines
8.2 KiB
C++

/*
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
*
* 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 "string_format.hpp"
/* This takes a pointer to the end of a buffer
* and fills it backwards towards the front.
* The return value 'q' is a pointer to the start.
* TODO: use std::array for all this. */
static char* to_string_dec_uint_internal(
char* p,
uint32_t n) {
*p = 0;
auto q = p;
do {
const uint32_t d = n % 10;
const char c = d + 48;
*(--q) = c;
n /= 10;
} while (n != 0);
return q;
}
static char* to_string_dec_uint_pad_internal(
char* const term,
const uint32_t n,
const int32_t l,
const char fill) {
auto q = to_string_dec_uint_internal(term, n);
// Fill with padding if needed.
// TODO: use std::array instead. There's no
// bounds checks on any of this!
if (fill) {
while ((term - q) < l) {
*(--q) = fill;
}
}
return q;
}
char* to_string_dec_uint(const uint32_t n, StringFormatBuffer& buffer, size_t& length) {
auto end = &buffer.back();
auto start = to_string_dec_uint_internal(end, n);
length = end - start;
return start;
}
std::string to_string_bin(
const uint32_t n,
const uint8_t l) {
char p[33];
for (uint8_t c = 0; c < l; c++) {
if (n & (1 << (l - 1 - c)))
p[c] = '1';
else
p[c] = '0';
}
p[l] = 0;
return p;
}
std::string to_string_dec_uint(
const uint32_t n,
const int32_t l,
const char fill) {
char p[16];
auto term = p + sizeof(p) - 1;
auto q = to_string_dec_uint_pad_internal(term, n, l, fill);
// TODO: is this needed, seems like pad already does this.
// Right justify.
while ((term - q) < l) {
*(--q) = ' ';
}
return q;
}
std::string to_string_dec_int(
const int32_t n,
const int32_t l,
const char fill) {
const size_t negative = (n < 0) ? 1 : 0;
uint32_t n_abs = negative ? -n : n;
char p[16];
auto term = p + sizeof(p) - 1;
auto q = to_string_dec_uint_pad_internal(term, n_abs, l - negative, fill);
// Add sign.
if (negative) {
*(--q) = '-';
}
// Right justify.
while ((term - q) < l) {
*(--q) = ' ';
}
return q;
}
std::string to_string_decimal(float decimal, int8_t precision) {
double integer_part;
double fractional_part;
std::string result;
fractional_part = modf(decimal, &integer_part) * pow(10, precision);
if (fractional_part < 0) {
fractional_part = -fractional_part;
}
result = to_string_dec_int(integer_part) + "." + to_string_dec_uint(fractional_part, precision, '0');
return result;
}
std::string to_string_freq(const uint64_t f) {
auto final_str = to_string_dec_int(f / 1000000, 4) + to_string_dec_int(f % 1000000, 6, '0');
return final_str;
}
std::string to_string_short_freq(const uint64_t f) {
auto final_str = to_string_dec_int(f / 1000000, 4) + "." + to_string_dec_int((f / 100) % 10000, 4, '0');
return final_str;
}
std::string to_string_time_ms(const uint32_t ms) {
std::string final_str{""};
if (ms < 1000) {
final_str = to_string_dec_uint(ms) + "ms";
} else {
auto seconds = ms / 1000;
if (seconds >= 60)
final_str = to_string_dec_uint(seconds / 60) + "m";
return final_str + to_string_dec_uint(seconds % 60) + "s";
}
return final_str;
}
static void to_string_hex_internal(char* p, const uint64_t n, const int32_t l) {
const uint32_t d = n & 0xf;
p[l] = (d > 9) ? (d + 55) : (d + 48);
if (l > 0) {
to_string_hex_internal(p, n >> 4, l - 1);
}
}
std::string to_string_hex(const uint64_t n, int32_t l) {
char p[32];
l = std::min(l, 31L);
to_string_hex_internal(p, n, l - 1);
p[l] = 0;
return p;
}
std::string to_string_hex_array(uint8_t* const array, const int32_t l) {
std::string str_return = "";
uint8_t bytes;
for (bytes = 0; bytes < l; bytes++)
str_return += to_string_hex(array[bytes], 2);
return str_return;
}
std::string to_string_datetime(const rtc::RTC& value, const TimeFormat format) {
std::string string{""};
if (format == YMDHMS) {
string += to_string_dec_uint(value.year(), 4) + "-" +
to_string_dec_uint(value.month(), 2, '0') + "-" +
to_string_dec_uint(value.day(), 2, '0') + " ";
}
string += to_string_dec_uint(value.hour(), 2, '0') + ":" +
to_string_dec_uint(value.minute(), 2, '0');
if ((format == YMDHMS) || (format == HMS))
string += ":" + to_string_dec_uint(value.second(), 2, '0');
return string;
}
std::string to_string_timestamp(const rtc::RTC& value) {
return to_string_dec_uint(value.year(), 4, '0') +
to_string_dec_uint(value.month(), 2, '0') +
to_string_dec_uint(value.day(), 2, '0') +
to_string_dec_uint(value.hour(), 2, '0') +
to_string_dec_uint(value.minute(), 2, '0') +
to_string_dec_uint(value.second(), 2, '0');
}
std::string to_string_FAT_timestamp(const FATTimestamp& timestamp) {
return to_string_dec_uint((timestamp.FAT_date >> 9) + 1980) + "-" +
to_string_dec_uint((timestamp.FAT_date >> 5) & 0xF, 2, '0') + "-" +
to_string_dec_uint((timestamp.FAT_date & 0x1F), 2, '0') + " " +
to_string_dec_uint((timestamp.FAT_time >> 11), 2, '0') + ":" +
to_string_dec_uint((timestamp.FAT_time >> 5) & 0x3F, 2, '0');
}
std::string to_string_file_size(uint32_t file_size) {
static const std::string suffix[5] = {"B", "kB", "MB", "GB", "??"};
size_t suffix_index = 0;
while (file_size >= 1024) {
file_size /= 1024;
suffix_index++;
}
if (suffix_index > 4)
suffix_index = 4;
return to_string_dec_uint(file_size) + suffix[suffix_index];
}
std::string unit_auto_scale(double n, const uint32_t base_nano, uint32_t precision) {
const uint32_t powers_of_ten[5] = {1, 10, 100, 1000, 10000};
std::string string{""};
uint32_t prefix_index = base_nano;
double integer_part;
double fractional_part;
precision = std::min((uint32_t)4, precision);
while (n > 1000) {
n /= 1000.0;
prefix_index++;
}
fractional_part = modf(n, &integer_part) * powers_of_ten[precision];
if (fractional_part < 0)
fractional_part = -fractional_part;
string = to_string_dec_int(integer_part);
if (precision)
string += '.' + to_string_dec_uint(fractional_part, precision);
if (prefix_index != 3)
string += unit_prefix[prefix_index];
return string;
}
double get_decimals(double num, int16_t mult, bool round) {
num -= int(num); // keep decimals only
num *= mult; // Shift decimals into integers
if (!round) return num;
int16_t intnum = int(num); // Round it up if necessary
num -= intnum; // Get decimal part
if (num > .5) intnum++; // Round up
return intnum;
}
static const char* whitespace_str = " \t\r\n";
std::string trim(std::string_view str) {
auto first = str.find_first_not_of(whitespace_str);
auto last = str.find_last_not_of(whitespace_str);
return std::string{str.substr(first, last - first)};
}
std::string trimr(std::string_view str) {
size_t last = str.find_last_not_of(whitespace_str);
return std::string{last != std::string::npos ? str.substr(0, last + 1) : ""};
}
std::string truncate(std::string_view str, size_t length) {
return std::string{str.length() <= length ? str : str.substr(0, length)};
}