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test: Add testing of swprintf/_swprintf/_snwprintf and related functions

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Martin Storsjö committed 2025-03-20 18:22:29 +02:00
1 parent 4f0ec7f8f8
commit 7e7e506bbc
1 file changed
+178
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test/crt-test.c
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@@ -78,6 +78,8 @@ const char *context = "";
} \
} while (0)
#define TEST_WSTR(x, expect) TEST_XSTR(wcscmp, wchar_t, x, expect, "%ls")
#define TEST_FLT(x, expect) do { \
tests++; \
if ((x) != (expect)) { \
@@ -212,6 +214,68 @@ int vsscanf_wrap(const char *str, const char *fmt, ...) {
return ret;
}
int vswprintf_wrap(wchar_t *buf, size_t n, const wchar_t *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int ret = vswprintf(buf, n, fmt, ap);
va_end(ap);
return ret;
}
#ifdef _WIN32
#ifdef __cplusplus
int vswprintf_overload_wrap(wchar_t *buf, const wchar_t *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int ret = vswprintf(buf, fmt, ap);
va_end(ap);
return ret;
}
#endif
int _vscprintf_wrap(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int ret = _vscprintf(fmt, ap);
va_end(ap);
return ret;
}
int _vswprintf_wrap(wchar_t *buf, const wchar_t *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int ret = _vswprintf(buf, fmt, ap);
va_end(ap);
return ret;
}
int _vsnwprintf_wrap(wchar_t *buf, size_t n, const wchar_t *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int ret = _vsnwprintf(buf, n, fmt, ap);
va_end(ap);
return ret;
}
#ifdef __MINGW32__
int vsnwprintf_wrap(wchar_t *buf, size_t n, const wchar_t *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int ret = vsnwprintf(buf, n, fmt, ap);
va_end(ap);
return ret;
}
#endif
int _vscwprintf_wrap(const wchar_t *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int ret = _vscwprintf(fmt, ap);
va_end(ap);
return ret;
}
#endif
double int_to_double(uint64_t i) {
union {
uint64_t i;
@@ -221,6 +285,12 @@ double int_to_double(uint64_t i) {
return u.d;
}
void fill_wchar(wchar_t *buf, wchar_t c, size_t n) {
for (size_t i = 0; i < n; i++)
buf[i] = c;
}
#define ARRAYLEN(x) (sizeof(x)/sizeof(*x))
void test_strings() {
char buf[200];
@@ -397,6 +467,114 @@ void test_strings() {
snprintf(buf, sizeof(buf), fmt, 42);
TEST_STR(buf, "0002a");
#ifdef _WIN32
TEST_INT(_scprintf("%d", 12345), 5);
TEST_INT(_vscprintf_wrap("%d", 12345), 5);
#endif
wchar_t wbuf[200], wbuf2[5];
int ret;
fill_wchar(wbuf, '#', ARRAYLEN(wbuf));
ret = swprintf(wbuf, ARRAYLEN(wbuf), L"%d", 42);
TEST_INT(ret, 2);
TEST_WSTR(wbuf, L"42");
TEST_INT(wbuf[ARRAYLEN(wbuf)-1], '#');
fill_wchar(wbuf, '#', ARRAYLEN(wbuf));
ret = vswprintf_wrap(wbuf, ARRAYLEN(wbuf), L"%d", 42);
TEST_INT(ret, 2);
TEST_WSTR(wbuf, L"42");
TEST_INT(wbuf[ARRAYLEN(wbuf)-1], '#');
fill_wchar(wbuf2, '#', ARRAYLEN(wbuf2));
ret = swprintf(wbuf2, ARRAYLEN(wbuf2), L"%d", 12345);
TEST_INT(ret, -1);
#ifndef __GLIBC__
// On overflow, glibc doesn't seem to null terminate the array.
// https://sourceware.org/bugzilla/show_bug.cgi?id=27857, fixed in
// glibc 2.37.
TEST_INT(wbuf2[ARRAYLEN(wbuf2)-1], '\0');
#endif
wbuf2[ARRAYLEN(wbuf2)-1] = '\0';
TEST_WSTR(wbuf2, L"1234");
#ifdef _WIN32
#ifdef __cplusplus
fill_wchar(wbuf, '#', ARRAYLEN(wbuf));
ret = swprintf(wbuf, L"%d", 42);
TEST_WSTR(wbuf, L"42");
TEST_INT(ret, 2);
TEST_INT(wbuf[ARRAYLEN(wbuf)-1], '#');
fill_wchar(wbuf, '#', ARRAYLEN(wbuf));
ret = vswprintf_overload_wrap(wbuf, L"%d", 42);
TEST_WSTR(wbuf, L"42");
TEST_INT(ret, 2);
TEST_INT(wbuf[ARRAYLEN(wbuf)-1], '#');
#endif
fill_wchar(wbuf, '#', ARRAYLEN(wbuf));
ret = _swprintf(wbuf, L"%d", 42);
TEST_WSTR(wbuf, L"42");
TEST_INT(ret, 2);
TEST_INT(wbuf[ARRAYLEN(wbuf)-1], '#');
fill_wchar(wbuf, '#', ARRAYLEN(wbuf));
ret = _vswprintf_wrap(wbuf, L"%d", 42);
TEST_WSTR(wbuf, L"42");
TEST_INT(ret, 2);
TEST_INT(wbuf[ARRAYLEN(wbuf)-1], '#');
fill_wchar(wbuf2, '#', ARRAYLEN(wbuf2));
ret = _snwprintf(wbuf2, ARRAYLEN(wbuf2), L"%d", 12345);
TEST_INT(ret, 5);
// On overflow, _snwprintf doesn't null terminate.
TEST_INT(wbuf2[ARRAYLEN(wbuf2)-1], '5');
wbuf2[ARRAYLEN(wbuf2)-1] = '\0';
TEST_WSTR(wbuf2, L"1234");
fill_wchar(wbuf2, '#', ARRAYLEN(wbuf2));
ret = _snwprintf(wbuf2, ARRAYLEN(wbuf2), L"%d", 123456);
TEST_INT(ret, -1);
// On overflow, _snwprintf doesn't null terminate.
TEST_INT(wbuf2[ARRAYLEN(wbuf2)-1], '5');
wbuf2[ARRAYLEN(wbuf2)-1] = '\0';
TEST_WSTR(wbuf2, L"1234");
fill_wchar(wbuf2, '#', ARRAYLEN(wbuf2));
ret = _vsnwprintf_wrap(wbuf2, ARRAYLEN(wbuf2), L"%d", 12345);
TEST_INT(ret, 5);
// On overflow, _vsnwprintf doesn't null terminate.
TEST_INT(wbuf2[ARRAYLEN(wbuf2)-1], '5');
wbuf2[ARRAYLEN(wbuf2)-1] = '\0';
TEST_WSTR(wbuf2, L"1234");
#ifdef __MINGW32__
fill_wchar(wbuf2, '#', ARRAYLEN(wbuf2));
ret = snwprintf(wbuf2, ARRAYLEN(wbuf2), L"%d", 123456);
TEST_INT(ret, 6);
// On overflow, snwprintf null terminates.
TEST_INT(wbuf2[ARRAYLEN(wbuf2)-1], '\0');
wbuf2[ARRAYLEN(wbuf2)-1] = '\0';
TEST_WSTR(wbuf2, L"1234");
TEST_INT(snwprintf(NULL, 0, L"%d", 123456), 6);
fill_wchar(wbuf2, '#', ARRAYLEN(wbuf2));
ret = vsnwprintf_wrap(wbuf2, ARRAYLEN(wbuf2), L"%d", 123456);
TEST_INT(ret, 6);
// On overflow, vsnwprintf null terminates.
TEST_INT(wbuf2[ARRAYLEN(wbuf2)-1], '\0');
wbuf2[ARRAYLEN(wbuf2)-1] = '\0';
TEST_WSTR(wbuf2, L"1234");
TEST_INT(vsnwprintf_wrap(NULL, 0, L"%d", 123456), 6);
#endif
TEST_INT(_scwprintf(L"%d", 123456), 6);
TEST_INT(_vscwprintf_wrap(L"%d", 123456), 6);
#endif
uint64_t val0, val1, val2, val3, val4, val5, val6, val7, val8, val9;
if (sscanf("baadf00dcafe baadf00dcaff baadf00dcb00 baadf00dcb01 baadf00dcb02 baadf00dcb03 baadf00dcb04 baadf00dcb05 baadf00dcb06 baadf00dcb07", "%" SCNx64" %" SCNx64" %" SCNx64" %" SCNx64" %" SCNx64" %" SCNx64" %" SCNx64" %" SCNx64" %" SCNx64" %" SCNx64, &val0, &val1, &val2, &val3, &val4, &val5, &val6, &val7, &val8, &val9) != 10) {
fails++;