Add strrchr test

1 files changed, 92 insertions, 0 deletions

diff --git a/string/test/strrchr.c b/string/test/strrchr.c
new file mode 100644
index 0000000..54c87b4
--- /dev/null
+++ b/string/test/strrchr.c
@@ -0,0 +1,92 @@
+/*
+ * strrchr test.
+ *
+ * Copyright (c) 2019, Arm Limited.
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include "stringlib.h"
+
+static const struct fun
+{
+	const char *name;
+	char *(*fun)(const char *s, int c);
+} funtab[] = {
+#define F(x) {#x, x},
+F(strrchr)
+#undef F
+	{0, 0}
+};
+
+static int test_status;
+#define ERR(...) (test_status=1, printf(__VA_ARGS__))
+
+#define A 32
+#define SP 512
+#define LEN 250000
+static char sbuf[LEN+2*A];
+
+static void *alignup(void *p)
+{
+	return (void*)(((uintptr_t)p + A-1) & -A);
+}
+
+static void test(const struct fun *fun, int align, int seekpos, int len)
+{
+	char *src = alignup(sbuf);
+	char *s = src + align;
+	char *f = seekpos != -1 ? s + seekpos : 0;
+	int seekchar = 0x1;
+	void *p;
+
+	if (len > LEN || seekpos >= len - 1 || align >= A)
+		abort();
+	if (seekchar >= 'a' && seekchar <= 'a' + 23)
+		abort();
+
+	for (int i = 0; i < len + A; i++)
+		src[i] = '?';
+	for (int i = 0; i < len - 2; i++)
+		s[i] = 'a' + i%23;
+	if (seekpos != -1)
+		s[seekpos/2] = s[seekpos] = seekchar;
+	s[len - 1] = '\0';
+
+	p = fun->fun(s, seekchar);
+
+	if (p != f) {
+		ERR("%s(%p,0x%02x,%d) returned %p\n", fun->name, s, seekchar, len, p);
+		ERR("expected: %p\n", f);
+		abort();
+	}
+}
+
+int main()
+{
+	int r = 0;
+	for (int i=0; funtab[i].name; i++) {
+		test_status = 0;
+		for (int a = 0; a < A; a++) {
+			int n;
+			for (n = 1; n < 100; n++) {
+				for (int sp = 0; sp < n - 1; sp++)
+					test(funtab+i, a, sp, n);
+				test(funtab+i, a, -1, n);
+			}
+			for (; n < LEN; n *= 2) {
+				test(funtab+i, a, -1, n);
+				test(funtab+i, a, n / 2, n);
+			}
+		}
+		if (test_status) {
+			r = -1;
+			ERR("FAIL %s\n", funtab[i].name);
+		}
+	}
+	return r;
+}