Add a file containing tests for simple format specifiers.

Currently it only has tests for a few sign issues with integer
formats, including PR 131880.

tools/regression/lib/libc/stdio/Makefile

@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-TESTS=	test-perror test-print-positional test-printfloat test-scanfloat
+TESTS=	test-perror test-print-positional test-printbasic test-printfloat test-scanfloat
 CFLAGS+= -lm
 
 .PHONY: tests

tools/regression/lib/libc/stdio/test-printbasic.c

@@ -0,0 +1,156 @@
+/*-
+ * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
+ * All rights reserved.
+ *
+ * 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.
+ */
+
+/*
+ * Tests for basic and miscellaneous printf() formats.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <assert.h>
+#include <err.h>
+#include <limits.h>
+#include <locale.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+
+#define	testfmt(result, fmt, ...)	\
+	_testfmt((result), __LINE__, #__VA_ARGS__, fmt, __VA_ARGS__)
+void _testfmt(const char *, int, const char *, const char *, ...);
+void smash_stack(void);
+
+#define	S_UINT64MAX	"18446744073709551615"
+#define	S_UINT32MAX	"4294967295"
+#define	S_INT64MIN	"-9223372036854775808"
+#define	S_INT32MIN	"-2147483648"
+
+#define	S_SIZEMAX	(SIZE_MAX == UINT64_MAX ? S_UINT64MAX : S_UINT32MAX)
+#define	S_ULONGMAX	(ULONG_MAX == UINT64_MAX ? S_UINT64MAX : S_UINT32MAX)
+#define	S_ULLONGMAX	(ULLONG_MAX == UINT64_MAX ? S_UINT64MAX : S_UINT32MAX)
+
+int
+main(int argc, char *argv[])
+{
+
+	printf("1..2\n");
+	assert(setlocale(LC_NUMERIC, "C"));
+
+	/* The test requires these to be true. */
+	assert(UINTMAX_MAX == UINT64_MAX);
+	assert(UINT_MAX == UINT32_MAX);
+	assert(USHRT_MAX == 0xffff);
+	assert(UCHAR_MAX == 0xff);
+
+	/*
+	 * Make sure we handle signed vs. unsigned args correctly.
+	 */
+	testfmt("-1", "%jd", (intmax_t)-1);
+	testfmt(S_UINT64MAX, "%ju", UINT64_MAX);
+
+	testfmt("-1", "%td", (ptrdiff_t)-1);
+	testfmt(S_SIZEMAX, "%tu", (size_t)-1);
+
+	testfmt("-1", "%zd", (ssize_t)-1);
+	testfmt(S_SIZEMAX, "%zu", (ssize_t)-1);
+
+	testfmt("-1", "%ld", (long)-1);
+	testfmt(S_ULONGMAX, "%lu", ULONG_MAX);
+
+	testfmt("-1", "%lld", (long long)-1);
+	testfmt(S_ULONGMAX, "%lu", ULLONG_MAX);
+
+	testfmt("-1", "%d", -1);
+	testfmt(S_UINT32MAX, "%lu", UINT32_MAX);
+
+	testfmt("-1", "%hd", -1);
+	testfmt("65535", "%hu", USHRT_MAX);
+
+	testfmt("-1", "%hhd", -1);
+	testfmt("255", "%hhu", UCHAR_MAX);
+
+	printf("ok 1 - printbasic signed/unsigned\n");
+
+	/*
+	 * Check that printing the largest negative number does not cause
+	 * overflow when it is negated.
+	 */
+	testfmt(S_INT32MIN, "%d", INT_MIN);
+	testfmt(S_INT64MIN, "%jd", INTMAX_MIN);
+
+	printf("ok 2 - printbasic INT_MIN\n");
+
+
+	return (0);
+}
+
+void
+smash_stack(void)
+{
+	static uint32_t junk = 0xdeadbeef;
+	uint32_t buf[512];
+	int i;
+
+	for (i = 0; i < sizeof(buf) / sizeof(buf[0]); i++)
+		buf[i] = junk;
+}
+
+void
+_testfmt(const char *result, int line, const char *argstr, const char *fmt,...)
+{
+#define	BUF	100
+	wchar_t ws[BUF], wfmt[BUF], wresult[BUF];
+	char s[BUF];
+	va_list ap, ap2;
+
+	va_start(ap, fmt);
+	va_copy(ap2, ap);
+	smash_stack();
+	vsnprintf(s, sizeof(s), fmt, ap);
+	if (strcmp(result, s) != 0) {
+		fprintf(stderr,
+		    "%d: printf(\"%s\", %s) ==> [%s], expected [%s]\n",
+		    line, fmt, argstr, s, result);
+		abort();
+	}
+
+	smash_stack();
+	mbstowcs(ws, s, BUF - 1);
+	mbstowcs(wfmt, fmt, BUF - 1);
+	mbstowcs(wresult, result, BUF - 1);
+	vswprintf(ws, sizeof(ws) / sizeof(ws[0]), wfmt, ap2);
+	if (wcscmp(wresult, ws) != 0) {
+		fprintf(stderr,
+		    "%d: wprintf(\"%ls\", %s) ==> [%ls], expected [%ls]\n",
+		    line, wfmt, argstr, ws, wresult);
+		abort();
+	}	
+}