1 files changed, 269 insertions, 0 deletions
diff --git a/lib/libc/tests/string/strcspn_test.c b/lib/libc/tests/string/strcspn_test.c
new file mode 100644
index 000000000000..293fc2bc8d4e
--- /dev/null
+++ b/lib/libc/tests/string/strcspn_test.c
@@ -0,0 +1,269 @@
+/*-
+ * Copyright (c) 2023 The FreeBSD Foundation
+ *
+ * This software was developed by Robert Clausecker <fuz@FreeBSD.org>
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ''AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE
+ */
+
+
+#include <atf-c.h>
+#include <assert.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <string.h>
+
+enum {
+	MAXALIGN = 16,	/* test all offsets from this alignment */
+	MAXBUF = 64,	/* test up to this buffer length */
+};
+
+enum { NOMATCH, MATCH };
+
+#ifdef STRSPN
+#define STRXSPN strspn
+#else
+#define STRXSPN strcspn
+#endif
+
+static void
+testcase(char *buf, size_t buflen, char *set, size_t setlen, int want_match)
+{
+	size_t i, outcome, expected;
+
+	assert(setlen < UCHAR_MAX - 2);
+
+	for (i = 0; i < buflen; i++)
+#ifdef STRSPN
+		buf[i] = UCHAR_MAX - i % (setlen > 0 ? setlen : 1);
+#else /* strcspn */
+		buf[i] = 1 + i % (UCHAR_MAX - setlen - 1);
+#endif
+
+	buf[i] = '\0';
+
+	for (i = 0; i < setlen; i++)
+		set[i] = UCHAR_MAX - i;
+
+	set[i] = '\0';
+
+#ifdef STRSPN
+	if (setlen == 0)
+		expected = 0;
+	else if (want_match == MATCH && buflen > 0) {
+		buf[buflen - 1] = 1;
+		expected = buflen - 1;
+	} else
+		expected = buflen;
+#else /* strcspn */
+	if (want_match == MATCH && buflen > 0 && setlen > 0) {
+		buf[buflen - 1] = UCHAR_MAX;
+		expected = buflen - 1;
+	} else
+		expected = buflen;
+#endif
+
+	outcome = STRXSPN(buf, set);
+	ATF_CHECK_EQ_MSG(expected, outcome, "%s(%p[%zu], %p[%zu]) = %zu != %zu",
+	    __XSTRING(STRXSPN), buf, buflen, set, setlen, outcome, expected);
+}
+
+/* test set with all alignments and lengths of buf */
+static void
+test_buf_alignments(char *set, size_t setlen, int want_match)
+{
+	char buf[MAXALIGN + MAXBUF + 1];
+	size_t i, j;
+
+	for (i = 0; i < MAXALIGN; i++)
+		for (j = 0; j <= MAXBUF; j++)
+			testcase(buf + i, j, set, setlen, want_match);
+}
+
+/* test buf with all alignments and lengths of set */
+static void
+test_set_alignments(char *buf, size_t buflen, int want_match)
+{
+	char set[MAXALIGN + MAXBUF + 1];
+	size_t i, j;
+
+	for (i = 0; i < MAXALIGN; i++)
+		for (j = 0; j <= MAXBUF; j++)
+			testcase(buf, buflen, set + i, j, want_match);
+}
+
+ATF_TC_WITHOUT_HEAD(buf_alignments);
+ATF_TC_BODY(buf_alignments, tc)
+{
+	char set[41];
+
+	test_buf_alignments(set, 0, MATCH);
+	test_buf_alignments(set, 1, MATCH);
+	test_buf_alignments(set, 5, MATCH);
+	test_buf_alignments(set, 20, MATCH);
+	test_buf_alignments(set, 40, MATCH);
+
+	test_buf_alignments(set, 0, NOMATCH);
+	test_buf_alignments(set, 1, NOMATCH);
+	test_buf_alignments(set, 5, NOMATCH);
+	test_buf_alignments(set, 20, NOMATCH);
+	test_buf_alignments(set, 40, NOMATCH);
+}
+
+ATF_TC_WITHOUT_HEAD(set_alignments);
+ATF_TC_BODY(set_alignments, tc)
+{
+	char buf[31];
+
+	test_set_alignments(buf,  0, MATCH);
+	test_set_alignments(buf, 10, MATCH);
+	test_set_alignments(buf, 20, MATCH);
+	test_set_alignments(buf, 30, MATCH);
+
+	test_set_alignments(buf,  0, NOMATCH);
+	test_set_alignments(buf, 10, NOMATCH);
+	test_set_alignments(buf, 20, NOMATCH);
+	test_set_alignments(buf, 30, NOMATCH);
+}
+
+#ifndef STRSPN
+/* test all positions in which set could match buf */
+static void
+test_match_positions(char *buf, char *set, size_t buflen, size_t setlen)
+{
+	size_t i, j, outcome;
+
+	memset(buf, '-', buflen);
+
+	for (i = 0; i < setlen; i++)
+		set[i] = 'A' + i;
+
+	buf[buflen] = '\0';
+	set[setlen] = '\0';
+
+	/*
+	 * Check for (mis)match at buffer position i
+	 * against set position j.
+	 */
+	for (i = 0; i < buflen; i++) {
+		for (j = 0; j < setlen; j++) {
+			buf[i] = set[j];
+
+			outcome = strcspn(buf, set);
+			ATF_CHECK_EQ_MSG(i, outcome,
+			    "strcspn(\"%s\", \"%s\") = %zu != %zu",
+			    buf, set, outcome, i);
+		}
+
+		buf[i] = '-';
+	}
+}
+
+ATF_TC_WITHOUT_HEAD(match_positions);
+ATF_TC_BODY(match_positions, tc)
+{
+	char buf[129], set[65];
+
+	test_match_positions(buf, set, 128, 64);
+	test_match_positions(buf, set, 64, 64);
+	test_match_positions(buf, set, 32, 64);
+	test_match_positions(buf, set, 16, 64);
+	test_match_positions(buf, set, 8, 64);
+	test_match_positions(buf, set, 128, 32);
+	test_match_positions(buf, set, 64, 32);
+	test_match_positions(buf, set, 32, 32);
+	test_match_positions(buf, set, 16, 32);
+	test_match_positions(buf, set, 8, 32);
+	test_match_positions(buf, set, 128, 16);
+	test_match_positions(buf, set, 64, 16);
+	test_match_positions(buf, set, 32, 16);
+	test_match_positions(buf, set, 16, 16);
+	test_match_positions(buf, set, 8, 16);
+	test_match_positions(buf, set, 128, 8);
+	test_match_positions(buf, set, 64, 8);
+	test_match_positions(buf, set, 32, 8);
+	test_match_positions(buf, set, 16, 8);
+	test_match_positions(buf, set, 8, 8);
+}
+
+/* if there are two matches, check that the earlier match is taken */
+static void
+test_match_order(char *buf, char *set, size_t buflen, size_t setlen)
+{
+	size_t i, j, k, l, outcome;
+
+	memset(buf, '-', buflen);
+
+	for (i = 0; i < setlen; i++)
+		set[i] = 'A' + i;
+
+	buf[buflen] = '\0';
+	set[setlen] = '\0';
+
+	for (i = 0; i < setlen; i++)
+		for (j = 0; j < setlen; j++)
+			for (k = 0; k + 1 < buflen; k++)
+				for (l = k + 1; l < buflen; l++) {
+					buf[k] = set[i];
+					buf[l] = set[j];
+					outcome = strcspn(buf, set);
+					ATF_CHECK_EQ_MSG(k, outcome,
+					    "strcspn(\"%s\", \"%s\") = %zu != %zu",
+					    buf, set, outcome, k);
+					buf[k] = '-';
+					buf[l] = '-';
+				}
+}
+
+ATF_TC_WITHOUT_HEAD(match_order);
+ATF_TC_BODY(match_order, tc)
+{
+	char buf[33], set[65];
+
+	test_match_order(buf, set, 32, 64);
+	test_match_order(buf, set, 16, 64);
+	test_match_order(buf, set, 8, 64);
+	test_match_order(buf, set, 32, 32);
+	test_match_order(buf, set, 16, 32);
+	test_match_order(buf, set, 8, 32);
+	test_match_order(buf, set, 32, 16);
+	test_match_order(buf, set, 16, 16);
+	test_match_order(buf, set, 8, 16);
+	test_match_order(buf, set, 32, 8);
+	test_match_order(buf, set, 16, 8);
+	test_match_order(buf, set, 8, 8);
+}
+#endif /* !defined(STRSPN) */
+
+ATF_TP_ADD_TCS(tp)
+{
+	ATF_TP_ADD_TC(tp, buf_alignments);
+	ATF_TP_ADD_TC(tp, set_alignments);
+#ifndef STRSPN
+	ATF_TP_ADD_TC(tp, match_positions);
+	ATF_TP_ADD_TC(tp, match_order);
+#endif
+
+	return (atf_no_error());
+}