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https://github.com/RobTillaart/Arduino.git
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133 lines
3.5 KiB
C
133 lines
3.5 KiB
C
#pragma once
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//
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// FILE: currency.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.0
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// PURPOSE: Currency library for Arduino
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// URL: https://github.com/RobTillaart/Currency
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// HISTORY
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// 0.1.0 2021-02-27 initial version
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#include "Arduino.h"
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#define CURRENCY_VERSION (F("0.1.0"))
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// TODO
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// optimize this 99% same code currency - currency64
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// print to string and "merge" with formatters?
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//
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// ALT-0165 = ¥
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// ALT-0128 = €
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// U+20BF = Bitcoin
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char * currency(int32_t value, int decimals, char dsep, char tsep, char sym)
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{
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static char tmp[16];
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int idx = 0;
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int32_t v = value;
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bool neg = v < 0;
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if (neg) v = -v;
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int p = -decimals; // decimal places
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while ((p < 1) || ( v > 0))
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{
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// separators
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if ((p == 0) && (decimals > 0) ) tmp[idx++] = dsep;
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if ((p > 0) && (p % 3 == 0) && (v > 0)) tmp[idx++] = tsep;
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int d = (v % 10) + '0';
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v /= 10;
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tmp[idx++] = d;
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p++;
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}
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if (neg) tmp[idx++] = '-';
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else tmp[idx++] = ' ';
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tmp[idx++] = sym;
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tmp[idx] = 0;
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// reverse string
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int len = strlen(tmp);
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for (int i = 0; i < len / 2; i++)
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{
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char c = tmp[i];
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tmp[i] = tmp[len - i - 1];
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tmp[len - i - 1] = c;
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}
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return tmp;
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}
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char * currency64(int64_t value, int decimals, char dsep, char tsep, char sym)
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{
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static char tmp[32];
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int idx = 0;
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int64_t v = value;
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bool neg = v < 0;
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if (neg) v = -v;
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int p = -decimals; // decimal places
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while ((p < 1) || ( v > 0))
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{
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// separators
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if ((p == 0) && (decimals > 0) ) tmp[idx++] = dsep;
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if ((p > 0) && (p % 3 == 0) && (v > 0)) tmp[idx++] = tsep;
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int d = (v % 10) + '0';
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v /= 10;
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tmp[idx++] = d;
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p++;
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}
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if (neg) tmp[idx++] = '-';
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else tmp[idx++] = ' ';
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tmp[idx++] = sym;
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tmp[idx] = 0;
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// reverse string
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int len = strlen(tmp);
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for (int i = 0; i < len / 2; i++)
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{
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char c = tmp[i];
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tmp[i] = tmp[len - i - 1];
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tmp[len - i - 1] = c;
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}
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return tmp;
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}
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//
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// DERIVED FUNCTIONS
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//
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char * bitcoin(int32_t value) { return currency(value, 6, '.', ',', 'B'); }
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char * dollar(int32_t value) { return currency(value, 2, '.', ',', '$'); }
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char * euro(int32_t value) { return currency(value, 2, ',', '.', 'E'); }
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char * roebel(int32_t value) { return currency(value, 2, ',', '.', 'P'); }
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char * yen(int32_t value) { return currency(value, 2, '.', ',', 'Y'); }
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char * yuan(int32_t value) { return currency(value, 2, '.', ',', 'R'); }
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char * bitcoin64(int64_t value) { return currency64(value, 6, '.', ',', 'B'); }
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char * dollar64(int64_t value) { return currency64(value, 2, '.', ',', '$'); }
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char * euro64(int64_t value) { return currency64(value, 2, ',', '.', 'E'); }
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char * roebel64(int64_t value) { return currency64(value, 2, ',', '.', 'P'); }
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char * yen64(int64_t value) { return currency64(value, 2, '.', ',', 'Y'); }
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char * yuan64(int64_t value) { return currency64(value, 2, '.', ',', 'R'); }
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char * bitcoinf(double value) { return currency64(round(value * 1000000), 6, '.', ',', 'B'); }
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char * dollarf(double value) { return currency64(round(value * 100), 2, '.', ',', '$'); }
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char * eurof(double value) { return currency64(round(value * 100), 2, ',', '.', 'E'); }
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char * roebelf(double value) { return currency64(round(value * 100), 2, ',', '.', 'P'); }
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char * yenf(double value) { return currency64(round(value * 100), 2, '.', ',', 'Y'); }
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char * yuanf(double value) { return currency64(round(value * 100), 2, '.', ',', 'R'); }
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// -- END OF FILE --
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