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/*
* print-test.cpp
*
* Tests the various Print methods. (For USBSerial; assuming that
* writing a single character works, this should generalize to
* HardwareSerial).
*
* This file is released into the public domain.
*/
#include "wirish.h"
#undef min
#undef max
// For snprintf()
#include <stdio.h>
// The <limits.h> that comes with newlib is missing LLONG_MAX, etc.
#include <limits>
using namespace std;
#define BUF_SIZE 100
char buf[BUF_SIZE];
void test_numbers(void);
void test_base_arithmetic(void);
void test_floating_point(void);
void print_separator(void);
void setup() {
while (!SerialUSB.available())
continue;
SerialUSB.read();
}
void loop() {
SerialUSB.println("Testing Print methods.");
print_separator();
test_numbers();
print_separator();
test_base_arithmetic();
print_separator();
test_floating_point();
print_separator();
SerialUSB.println("Test finished.");
while (true) {
continue;
}
}
void test_numbers(void) {
SerialUSB.println("Numeric types:");
SerialUSB.println("unsigned char: ");
// prevent Print from treating it as an (extended) ASCII character:
SerialUSB.println((uint32)numeric_limits<unsigned char>::max());
SerialUSB.print("int: ");
SerialUSB.print(numeric_limits<int>::min());
SerialUSB.print(" -- ");
SerialUSB.println(numeric_limits<int>::max());
SerialUSB.print("unsigned int: ");
SerialUSB.print(numeric_limits<unsigned int>::max());
SerialUSB.println();
SerialUSB.print("long: ");
SerialUSB.print(numeric_limits<long>::min());
SerialUSB.print(" -- ");
SerialUSB.println(numeric_limits<long>::max());
SerialUSB.print("long long: ");
SerialUSB.print(numeric_limits<long long>::min());
SerialUSB.print(" -- ");
SerialUSB.println(numeric_limits<long long>::max());
SerialUSB.print("unsigned long long: ");
SerialUSB.println(numeric_limits<unsigned long long>::max());
}
void test_base_arithmetic(void) {
SerialUSB.println("Base arithmetic:");
SerialUSB.print("Binary: ");
SerialUSB.print(numeric_limits<unsigned long>::max(), BIN);
SerialUSB.print(", ");
SerialUSB.println(numeric_limits<unsigned long long>::max(), BIN);
SerialUSB.print("Octal: ");
SerialUSB.print(numeric_limits<unsigned long>::max(), OCT);
SerialUSB.print(", ");
SerialUSB.println(numeric_limits<unsigned long long>::max(), OCT);
SerialUSB.print("Decimal: ");
SerialUSB.print(numeric_limits<unsigned long>::max(), DEC);
SerialUSB.print(", ");
SerialUSB.println(numeric_limits<unsigned long long>::max(), DEC);
SerialUSB.print("Hexadecimal: ");
SerialUSB.print(numeric_limits<unsigned long>::max(), HEX);
SerialUSB.print(", ");
SerialUSB.println(numeric_limits<unsigned long long>::max(), HEX);
}
void test_floating_point(void) {
double dmax = numeric_limits<double>::max();
SerialUSB.println("Floating point:");
SerialUSB.print("sizeof double: ");
SerialUSB.println(sizeof(double));
SerialUSB.print("println(-5.67): ");
SerialUSB.println(-5.67);
SerialUSB.print("println((double)(LLONG_MAX - 10)): ");
SerialUSB.println((double)(numeric_limits<long long>::max() - 10));
SerialUSB.print("println((double)(LLONG_MAX - 10)) from snprintf(): ");
snprintf(buf, BUF_SIZE, "%.2f",
(double)(numeric_limits<long long>::max() - 10));
SerialUSB.println(buf);
SerialUSB.print("println((double)LLONG_MAX / 2): ");
SerialUSB.println((double)(numeric_limits<long long>::max()) / 2);
SerialUSB.print("println((double)LLONG_MAX / 2) from snprintf(): ");
snprintf(buf, BUF_SIZE, "%.2f",
(double)(numeric_limits<long long>::max()) / 2);
SerialUSB.println(buf);
SerialUSB.print("DBL_MAX: ");
SerialUSB.println(dmax);
SerialUSB.print("DBL_MAX from snprintf(): ");
snprintf(buf, BUF_SIZE, "%g", dmax);
SerialUSB.println(buf);
SerialUSB.print("-DBL_MAX / 2: ");
SerialUSB.println(-dmax / 2.0);
SerialUSB.print("-DBL_MAX / 2 from snprintf(): ");
snprintf(buf, BUF_SIZE, "%g", -dmax / 2.0);
SerialUSB.println(buf);
SerialUSB.print("Double epsilon, round error: ");
SerialUSB.print(numeric_limits<double>::epsilon());
SerialUSB.print(", ");
SerialUSB.println(numeric_limits<double>::round_error());
SerialUSB.println();
float fmax = numeric_limits<float>::max();
SerialUSB.print("sizeof float: ");
SerialUSB.println(sizeof(float));
SerialUSB.print("println(-5.67f): ");
SerialUSB.println(-5.67f);
SerialUSB.print("Float max: ");
SerialUSB.println(fmax);
SerialUSB.print("Float epsilon, round error: ");
SerialUSB.print(numeric_limits<float>::epsilon());
SerialUSB.print(", ");
SerialUSB.println(numeric_limits<float>::round_error());
}
void print_separator(void) {
SerialUSB.println();
SerialUSB.println(" ** ");
SerialUSB.println();
}
// Force init to be called *first*, i.e. before static object allocation.
// Otherwise, statically allocated objects that need libmaple may fail.
__attribute__((constructor)) void premain() {
init();
}
int main(void) {
setup();
while (1) {
loop();
}
return 0;
}
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