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https://github.com/RobTillaart/Arduino.git
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117 lines
3.6 KiB
C++
117 lines
3.6 KiB
C++
//
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// FILE: currency.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.7
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// PURPOSE: Currency library for Arduino
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// URL: https://github.com/RobTillaart/Currency
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//
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// HISTORY: see changelog.md
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#include "currency.h"
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char * currency(int32_t value, int decimals, char decimalSeparator, char thousandSeparator, char symbol)
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{
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static char tmp[16];
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uint8_t index = 0;
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int32_t v = value;
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bool negative = v < 0;
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if (negative) v = -v;
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int pos = -decimals; // decimal places
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while ((pos < 1) || (v > 0))
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{
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// separators
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if ((pos == 0) && (decimals > 0) ) tmp[index++] = decimalSeparator;
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if ((pos > 0) && (pos % 3 == 0) ) tmp[index++] = thousandSeparator;
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pos++;
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tmp[index++] = (v % 10) + '0';
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v /= 10;
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}
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if (negative) tmp[index++] = '-';
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else tmp[index++] = ' ';
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tmp[index++] = symbol;
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tmp[index] = '\0';
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// reverse string
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for (uint8_t i = 0, j = index - 1; i < index / 2; i++, j--)
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{
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char c = tmp[i];
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tmp[i] = tmp[j];
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tmp[j] = 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 decimalSeparator, char thousandSeparator, char symbol)
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{
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static char tmp[32];
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int index = 0;
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int64_t v = value;
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bool negative = v < 0;
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if (negative) v = -v;
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int pos = -decimals; // decimal places
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while ((pos < 1) || (v > 0))
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{
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// separators
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if ((pos == 0) && (decimals > 0) ) tmp[index++] = decimalSeparator;
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if ((pos > 0) && (pos % 3 == 0) ) tmp[index++] = thousandSeparator;
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pos++;
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tmp[index++] = (v % 10) + '0';
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v /= 10;
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}
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if (negative) tmp[index++] = '-';
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else tmp[index++] = ' ';
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tmp[index++] = symbol;
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tmp[index] = '\0';
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// reverse string
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for (uint8_t i = 0, j = index - 1; i < index / 2; i++, j--)
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{
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char c = tmp[i];
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tmp[i] = tmp[j];
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tmp[j] = 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, '.', ',', '$'); }
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char * euro(int32_t value) { return currency(value, 2, ',', '.', 'E'); }
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char * pound(int32_t value) { return currency(value, 2, ',', '.', 'L'); }
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char * roubles(int32_t value) { return currency(value, 2, ',', '.', 'P'); }
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char * yen(int32_t value) { return currency(value, 2, '.', ',', 'Y'); }
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char * yuan(int32_t value) { return currency(value, 2, '.', ',', 'R'); }
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char * bitcoin64(int64_t value) { return currency64(value, 6, '.', ',', 'B'); }
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char * dollar64(int64_t value) { return currency64(value, 2, '.', ',', '$'); }
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char * euro64(int64_t value) { return currency64(value, 2, ',', '.', 'E'); }
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char * pound64(int64_t value) { return currency64(value, 2, ',', '.', 'L'); }
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char * roubles64(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 * poundf(double value) { return currency64(round(value * 100), 2, ',', '.', 'L'); }
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char * roublesf(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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