mirrors/SDL
1
0
Fork 0
mirror of https://github.com/libsdl-org/SDL.git synced 2025-12-15 19:05:32 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fixed rounding of floating point values in snprintf

Browse Source
This commit is contained in:
Sam Lantinga
2023-01-02 21:57:42 -08:00
parent 72f0056961
commit 38b138cd0a
2 changed files with 118 additions and 64 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
test/testautomation_stdlib.c
View File

@@ -153,17 +153,46 @@ int stdlib_snprintf(void *arg)
SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
SDLTest_AssertCheck(result == 6, "Check result value, expected: 6, got: %d", result);
result = SDL_snprintf(text, sizeof(text), "%g", 100.0);
expected = "100";
SDLTest_AssertPass("Call to SDL_snprintf(\"%%g\", 100.0)");
SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
SDLTest_AssertCheck(result == 3, "Check result value, expected: 3, got: %d", result);
{
static struct
{
float value;
const char *expected_f;
const char *expected_g;
} f_and_g_test_cases[] = {
{ 100.0f, "100.000000", "100" },
{ -100.0f, "-100.000000", "-100" },
{ 100.75f, "100.750000", "100.75" },
{ -100.75f, "-100.750000", "-100.75" },
{ ((100 * 60 * 1000) / 1001) / 100.0f, "59.939999", "59.94" },
{ -((100 * 60 * 1000) / 1001) / 100.0f, "-59.939999", "-59.94" },
{ ((100 * 120 * 1000) / 1001) / 100.0f, "119.879997", "119.88" },
{ -((100 * 120 * 1000) / 1001) / 100.0f, "-119.879997", "-119.88" },
{ 9.9999999f, "10.000000", "10" },
{ -9.9999999f, "-10.000000", "-10" },
};
int i;
result = SDL_snprintf(text, sizeof(text), "%g", 100.75);
expected = "100.75";
SDLTest_AssertPass("Call to SDL_snprintf(\"%%g\", 100.75)");
SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
SDLTest_AssertCheck(result == 6, "Check result value, expected: 6, got: %d", result);
for (i = 0; i < SDL_arraysize(f_and_g_test_cases); ++i) {
float value = f_and_g_test_cases[i].value;
result = SDL_snprintf(text, sizeof(text), "%f", value);
predicted = SDL_snprintf(NULL, 0, "%f", value);
expected = f_and_g_test_cases[i].expected_f;
SDLTest_AssertPass("Call to SDL_snprintf(\"%%f\", %g)", value);
SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
SDLTest_AssertCheck(result == SDL_strlen(expected), "Check result value, expected: %d, got: %d", SDL_strlen(expected), result);
SDLTest_AssertCheck(predicted == result, "Check predicted value, expected: %d, got: %d", result, predicted);
result = SDL_snprintf(text, sizeof(text), "%g", value);
predicted = SDL_snprintf(NULL, 0, "%g", value);
expected = f_and_g_test_cases[i].expected_g;
SDLTest_AssertPass("Call to SDL_snprintf(\"%%g\", %g)", value);
SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
SDLTest_AssertCheck(result == SDL_strlen(expected), "Check result value, expected: %d, got: %d", SDL_strlen(expected), result);
SDLTest_AssertCheck(predicted == result, "Check predicted value, expected: %d, got: %d", result, predicted);
}
}
size = 64;
result = SDL_snprintf(text, sizeof(text), "%zu %s", size, "test");