glibc/localedata/tests-mbwc/tst_wcsncmp.c
Stefan Liebler 920a0395ba Use correct signedness in wcsncmp
[BZ #18206]
	* wcsmbs/wcsncmp.c (wcsncmp): Compare as wchar_t, not wint_t.
	  Use signed comparision instead of substraction to avoid
	  overflow bug.
	* localedata/tests-mbwc/tst_wcsncmp.c (tst_wcsncmp):
	  Take the sign of ret.
	* localedata/tests-mbwc/dat_wcsncmp.c (tst_wcsncmp_loc):
	  Do not expect precise return values. Only the sign matters.
	* wcsmbs/Makefile (strop-tests): Add wcsncmp.
	* wcsmbs/test-wcsncmp.c: New File.
	* string/test-strncmp.c: Add wcsncmp support.
2015-04-13 21:25:04 +02:00

42 lines
980 B
C

/*-------------------------------------------------------------------------------------*/
/* WCSNCMP: int wcsncmp( const wchar_t *ws1, const wchar_t *ws2, size_t n ) */
/*-------------------------------------------------------------------------------------*/
#define TST_FUNCTION wcsncmp
#include "tsp_common.c"
#include "dat_wcsncmp.c"
int
tst_wcsncmp (FILE * fp, int debug_flg)
{
TST_DECL_VARS (int);
wchar_t *ws1, *ws2;
size_t n;
TST_DO_TEST (wcsncmp)
{
TST_HEAD_LOCALE (wcsncmp, S_WCSNCMP);
TST_DO_REC (wcsncmp)
{
TST_GET_ERRET (wcsncmp);
ws1 = TST_INPUT (wcsncmp).ws1; /* external value: size WCSSIZE */
ws2 = TST_INPUT (wcsncmp).ws2;
n = TST_INPUT (wcsncmp).n;
ret = wcsncmp (ws1, ws2, n);
ret = (ret > 0 ? 1 : ret < 0 ? -1 : 0);
if (debug_flg)
{
fprintf (stderr, "tst_wcsncmp: ret = %d, 0x%x\n", ret, ret);
}
TST_IF_RETURN (S_WCSNCMP)
{
};
}
}
return err_count;
}