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#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;
}
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