118 lines
3.5 KiB
C
118 lines
3.5 KiB
C
#include <libfixmath/fix16.h>
|
|
#include <stdio.h>
|
|
#include <math.h>
|
|
#include <string.h>
|
|
#include <stdbool.h>
|
|
#include "unittests.h"
|
|
|
|
int main()
|
|
{
|
|
int status = 0;
|
|
|
|
{
|
|
COMMENT("Testing fix16_to_str corner cases");
|
|
char buf[13];
|
|
|
|
fix16_to_str(fix16_from_dbl(1234.5678), buf, 4);
|
|
printf("1234.5678 = %s\n", buf);
|
|
TEST(strcmp(buf, "1234.5678") == 0);
|
|
|
|
fix16_to_str(fix16_from_dbl(-1234.5678), buf, 4);
|
|
printf("-1234.5678 = %s\n", buf);
|
|
TEST(strcmp(buf, "-1234.5678") == 0);
|
|
|
|
fix16_to_str(0, buf, 0);
|
|
TEST(strcmp(buf, "0") == 0);
|
|
|
|
fix16_to_str(fix16_from_dbl(0.9), buf, 0);
|
|
TEST(strcmp(buf, "1") == 0);
|
|
|
|
fix16_to_str(1, buf, 5);
|
|
printf("(fix16_t)1 = %s\n", buf);
|
|
TEST(strcmp(buf, "0.00002") == 0);
|
|
|
|
fix16_to_str(-1, buf, 5);
|
|
printf("(fix16_t)-1 = %s\n", buf);
|
|
TEST(strcmp(buf, "-0.00002") == 0);
|
|
|
|
fix16_to_str(65535, buf, 5);
|
|
printf("(fix16_t)65535 = %s\n", buf);
|
|
TEST(strcmp(buf, "0.99998") == 0);
|
|
|
|
fix16_to_str(65535, buf, 4);
|
|
printf("(fix16_t)65535 = %s\n", buf);
|
|
TEST(strcmp(buf, "1.0000") == 0);
|
|
|
|
fix16_to_str(fix16_maximum, buf, 5);
|
|
printf("fix16_maximum = %s\n", buf);
|
|
TEST(strcmp(buf, "32767.99998") == 0);
|
|
|
|
fix16_to_str(fix16_minimum, buf, 5);
|
|
printf("fix16_minimum = %s\n", buf);
|
|
TEST(strcmp(buf, "-32768.00000") == 0);
|
|
}
|
|
|
|
{
|
|
COMMENT("Testing fix16_from_str corner cases");
|
|
|
|
TEST(fix16_from_str("1234.5678") == fix16_from_dbl(1234.5678));
|
|
TEST(fix16_from_str("-1234.5678") == fix16_from_dbl(-1234.5678));
|
|
TEST(fix16_from_str(" +1234,56780 ") == fix16_from_dbl(1234.5678));
|
|
|
|
TEST(fix16_from_str("0") == 0);
|
|
TEST(fix16_from_str("1") == fix16_one);
|
|
TEST(fix16_from_str("1.0") == fix16_one);
|
|
TEST(fix16_from_str("1.0000000000") == fix16_one);
|
|
|
|
TEST(fix16_from_str("0.00002") == 1);
|
|
TEST(fix16_from_str("0.99998") == 65535);
|
|
|
|
TEST(fix16_from_str("32767.99998") == fix16_maximum);
|
|
TEST(fix16_from_str("-32768.00000") == fix16_minimum);
|
|
}
|
|
|
|
{
|
|
COMMENT("Extended testing for whole range");
|
|
fix16_t value = fix16_minimum;
|
|
char testbuf[13];
|
|
char goodbuf[13];
|
|
|
|
bool ok = true;
|
|
while (value < fix16_maximum)
|
|
{
|
|
double fvalue = fix16_to_dbl(value);
|
|
|
|
/* Turns out we have to jump through some hoops to round
|
|
doubles perfectly for printing:
|
|
http://stackoverflow.com/questions/994764/rounding-doubles-5-sprintf
|
|
*/
|
|
fvalue = round(fvalue * 100000.)/100000.;
|
|
|
|
snprintf(goodbuf, 13, "%0.5f", fvalue);
|
|
fix16_to_str(value, testbuf, 5);
|
|
|
|
if (strcmp(goodbuf, testbuf) != 0)
|
|
{
|
|
printf("Value (fix16_t)%d gave %s, should be %s\n", value, testbuf, goodbuf);
|
|
ok = false;
|
|
}
|
|
|
|
fix16_t roundtrip = fix16_from_str(testbuf);
|
|
if (roundtrip != value)
|
|
{
|
|
printf("Roundtrip failed: (fix16_t)%d -> %s -> (fix16_t)%d\n", value, testbuf, roundtrip);
|
|
ok = false;
|
|
}
|
|
|
|
value += 0x10001;
|
|
}
|
|
|
|
TEST(ok);
|
|
}
|
|
|
|
if (status != 0)
|
|
fprintf(stdout, "\n\nSome tests FAILED!\n");
|
|
|
|
return status;
|
|
}
|