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test: Add testing of swprintf/_swprintf/_snwprintf and related functions
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‎test/crt-test.c‎

Lines changed: 178 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -78,6 +78,8 @@ const char *context = "";
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} \
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} while (0)
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#define TEST_WSTR(x, expect) TEST_XSTR(wcscmp, wchar_t, x, expect, "%ls")
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#define TEST_FLT(x, expect) do { \
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tests++; \
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if ((x) != (expect)) { \
@@ -212,6 +214,68 @@ int vsscanf_wrap(const char *str, const char *fmt, ...) {
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return ret;
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}
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int vswprintf_wrap(wchar_t *buf, size_t n, const wchar_t *fmt, ...) {
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va_list ap;
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va_start(ap, fmt);
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int ret = vswprintf(buf, n, fmt, ap);
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va_end(ap);
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return ret;
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}
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#ifdef _WIN32
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#ifdef __cplusplus
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int vswprintf_overload_wrap(wchar_t *buf, const wchar_t *fmt, ...) {
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va_list ap;
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va_start(ap, fmt);
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int ret = vswprintf(buf, fmt, ap);
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va_end(ap);
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return ret;
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}
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#endif
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int _vscprintf_wrap(const char *fmt, ...) {
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va_list ap;
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va_start(ap, fmt);
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int ret = _vscprintf(fmt, ap);
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va_end(ap);
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return ret;
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}
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int _vswprintf_wrap(wchar_t *buf, const wchar_t *fmt, ...) {
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va_list ap;
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va_start(ap, fmt);
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int ret = _vswprintf(buf, fmt, ap);
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va_end(ap);
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return ret;
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}
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int _vsnwprintf_wrap(wchar_t *buf, size_t n, const wchar_t *fmt, ...) {
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va_list ap;
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va_start(ap, fmt);
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int ret = _vsnwprintf(buf, n, fmt, ap);
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va_end(ap);
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return ret;
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}
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#ifdef __MINGW32__
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int vsnwprintf_wrap(wchar_t *buf, size_t n, const wchar_t *fmt, ...) {
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va_list ap;
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va_start(ap, fmt);
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int ret = vsnwprintf(buf, n, fmt, ap);
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va_end(ap);
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return ret;
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}
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#endif
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int _vscwprintf_wrap(const wchar_t *fmt, ...) {
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va_list ap;
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va_start(ap, fmt);
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int ret = _vscwprintf(fmt, ap);
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va_end(ap);
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return ret;
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}
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#endif
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double int_to_double(uint64_t i) {
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union {
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uint64_t i;
@@ -221,6 +285,12 @@ double int_to_double(uint64_t i) {
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return u.d;
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}
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void fill_wchar(wchar_t *buf, wchar_t c, size_t n) {
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for (size_t i = 0; i < n; i++)
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buf[i] = c;
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}
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#define ARRAYLEN(x) (sizeof(x)/sizeof(*x))
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void test_strings() {
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char buf[200];
@@ -397,6 +467,114 @@ void test_strings() {
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snprintf(buf, sizeof(buf), fmt, 42);
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TEST_STR(buf, "0002a");
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#ifdef _WIN32
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TEST_INT(_scprintf("%d", 12345), 5);
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TEST_INT(_vscprintf_wrap("%d", 12345), 5);
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#endif
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wchar_t wbuf[200], wbuf2[5];
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int ret;
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fill_wchar(wbuf, '#', ARRAYLEN(wbuf));
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ret = swprintf(wbuf, ARRAYLEN(wbuf), L"%d", 42);
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TEST_INT(ret, 2);
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TEST_WSTR(wbuf, L"42");
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TEST_INT(wbuf[ARRAYLEN(wbuf)-1], '#');
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fill_wchar(wbuf, '#', ARRAYLEN(wbuf));
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ret = vswprintf_wrap(wbuf, ARRAYLEN(wbuf), L"%d", 42);
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TEST_INT(ret, 2);
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TEST_WSTR(wbuf, L"42");
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TEST_INT(wbuf[ARRAYLEN(wbuf)-1], '#');
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fill_wchar(wbuf2, '#', ARRAYLEN(wbuf2));
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ret = swprintf(wbuf2, ARRAYLEN(wbuf2), L"%d", 12345);
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TEST_INT(ret, -1);
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#ifndef __GLIBC__
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// On overflow, glibc doesn't seem to null terminate the array.
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// https://sourceware.org/bugzilla/show_bug.cgi?id=27857, fixed in
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// glibc 2.37.
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TEST_INT(wbuf2[ARRAYLEN(wbuf2)-1], '\0');
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#endif
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wbuf2[ARRAYLEN(wbuf2)-1] = '\0';
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TEST_WSTR(wbuf2, L"1234");
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#ifdef _WIN32
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#ifdef __cplusplus
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fill_wchar(wbuf, '#', ARRAYLEN(wbuf));
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ret = swprintf(wbuf, L"%d", 42);
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TEST_WSTR(wbuf, L"42");
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TEST_INT(ret, 2);
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TEST_INT(wbuf[ARRAYLEN(wbuf)-1], '#');
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fill_wchar(wbuf, '#', ARRAYLEN(wbuf));
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ret = vswprintf_overload_wrap(wbuf, L"%d", 42);
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TEST_WSTR(wbuf, L"42");
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TEST_INT(ret, 2);
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TEST_INT(wbuf[ARRAYLEN(wbuf)-1], '#');
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#endif
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fill_wchar(wbuf, '#', ARRAYLEN(wbuf));
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ret = _swprintf(wbuf, L"%d", 42);
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TEST_WSTR(wbuf, L"42");
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TEST_INT(ret, 2);
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TEST_INT(wbuf[ARRAYLEN(wbuf)-1], '#');
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fill_wchar(wbuf, '#', ARRAYLEN(wbuf));
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ret = _vswprintf_wrap(wbuf, L"%d", 42);
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TEST_WSTR(wbuf, L"42");
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TEST_INT(ret, 2);
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TEST_INT(wbuf[ARRAYLEN(wbuf)-1], '#');
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fill_wchar(wbuf2, '#', ARRAYLEN(wbuf2));
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ret = _snwprintf(wbuf2, ARRAYLEN(wbuf2), L"%d", 12345);
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TEST_INT(ret, 5);
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// On overflow, _snwprintf doesn't null terminate.
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TEST_INT(wbuf2[ARRAYLEN(wbuf2)-1], '5');
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wbuf2[ARRAYLEN(wbuf2)-1] = '\0';
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TEST_WSTR(wbuf2, L"1234");
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fill_wchar(wbuf2, '#', ARRAYLEN(wbuf2));
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ret = _snwprintf(wbuf2, ARRAYLEN(wbuf2), L"%d", 123456);
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TEST_INT(ret, -1);
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// On overflow, _snwprintf doesn't null terminate.
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TEST_INT(wbuf2[ARRAYLEN(wbuf2)-1], '5');
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wbuf2[ARRAYLEN(wbuf2)-1] = '\0';
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TEST_WSTR(wbuf2, L"1234");
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fill_wchar(wbuf2, '#', ARRAYLEN(wbuf2));
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ret = _vsnwprintf_wrap(wbuf2, ARRAYLEN(wbuf2), L"%d", 12345);
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TEST_INT(ret, 5);
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// On overflow, _vsnwprintf doesn't null terminate.
548+
TEST_INT(wbuf2[ARRAYLEN(wbuf2)-1], '5');
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wbuf2[ARRAYLEN(wbuf2)-1] = '\0';
550+
TEST_WSTR(wbuf2, L"1234");
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#ifdef __MINGW32__
553+
fill_wchar(wbuf2, '#', ARRAYLEN(wbuf2));
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ret = snwprintf(wbuf2, ARRAYLEN(wbuf2), L"%d", 123456);
555+
TEST_INT(ret, 6);
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// On overflow, snwprintf null terminates.
557+
TEST_INT(wbuf2[ARRAYLEN(wbuf2)-1], '\0');
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wbuf2[ARRAYLEN(wbuf2)-1] = '\0';
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TEST_WSTR(wbuf2, L"1234");
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TEST_INT(snwprintf(NULL, 0, L"%d", 123456), 6);
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fill_wchar(wbuf2, '#', ARRAYLEN(wbuf2));
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ret = vsnwprintf_wrap(wbuf2, ARRAYLEN(wbuf2), L"%d", 123456);
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TEST_INT(ret, 6);
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// On overflow, vsnwprintf null terminates.
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TEST_INT(wbuf2[ARRAYLEN(wbuf2)-1], '\0');
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wbuf2[ARRAYLEN(wbuf2)-1] = '\0';
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TEST_WSTR(wbuf2, L"1234");
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TEST_INT(vsnwprintf_wrap(NULL, 0, L"%d", 123456), 6);
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#endif
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TEST_INT(_scwprintf(L"%d", 123456), 6);
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TEST_INT(_vscwprintf_wrap(L"%d", 123456), 6);
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#endif
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400578
uint64_t val0, val1, val2, val3, val4, val5, val6, val7, val8, val9;
401579
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) {
402580
fails++;

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