Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1128 insertions, 0 deletions

diff --git a/mozglue/tests/TestIntegerPrintfMacros.cpp b/mozglue/tests/TestIntegerPrintfMacros.cpp
new file mode 100644
index 0000000000..71fb26fc47
--- /dev/null
+++ b/mozglue/tests/TestIntegerPrintfMacros.cpp
@@ -0,0 +1,1128 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/Assertions.h"
+#include "mozilla/Sprintf.h"
+
+#include <string.h>
+#include <inttypes.h>
+
+/* Output array and poisoning method shared by all tests. */
+static char gOutput[32];
+
+static void PoisonOutput() { memset(gOutput, 0xDA, sizeof(gOutput)); }
+
+/*
+ * The fprintf macros for signed integers are:
+ *
+ *   PRIdN   PRIdLEASTN   PRIdFASTN   PRIdMAX   PRIdPTR
+ *   PRIiN   PRIiLEASTN   PRIiFASTN   PRIiMAX   PRIiPTR
+ *
+ * In these names N is the width of the type as described in C99 7.18.1.
+ */
+
+static void TestPrintSigned8() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRId8, int8_t(-17));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "-17"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIi8, int8_t(42));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "42"));
+}
+
+static void TestPrintSigned16() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRId16, int16_t(-289));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "-289"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIi16, int16_t(728));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "728"));
+}
+
+static void TestPrintSigned32() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRId32, int32_t(-342178));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "-342178"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIi32, int32_t(5719283));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "5719283"));
+}
+
+static void TestPrintSigned64() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRId64, int64_t(-INT64_C(432157943248732)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "-432157943248732"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIi64, int64_t(INT64_C(325719232983)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "325719232983"));
+}
+
+static void TestPrintSignedN() {
+  TestPrintSigned8();
+  TestPrintSigned16();
+  TestPrintSigned32();
+  TestPrintSigned64();
+}
+
+static void TestPrintSignedLeast8() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIdLEAST8, int_least8_t(-17));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "-17"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIiLEAST8, int_least8_t(42));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "42"));
+}
+
+static void TestPrintSignedLeast16() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIdLEAST16, int_least16_t(-289));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "-289"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIiLEAST16, int_least16_t(728));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "728"));
+}
+
+static void TestPrintSignedLeast32() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIdLEAST32, int_least32_t(-342178));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "-342178"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIiLEAST32, int_least32_t(5719283));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "5719283"));
+}
+
+static void TestPrintSignedLeast64() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIdLEAST64,
+                 int_least64_t(-INT64_C(432157943248732)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "-432157943248732"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIiLEAST64,
+                 int_least64_t(INT64_C(325719232983)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "325719232983"));
+}
+
+static void TestPrintSignedLeastN() {
+  TestPrintSignedLeast8();
+  TestPrintSignedLeast16();
+  TestPrintSignedLeast32();
+  TestPrintSignedLeast64();
+}
+
+static void TestPrintSignedFast8() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIdFAST8, int_fast8_t(-17));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "-17"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIiFAST8, int_fast8_t(42));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "42"));
+}
+
+static void TestPrintSignedFast16() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIdFAST16, int_fast16_t(-289));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "-289"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIiFAST16, int_fast16_t(728));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "728"));
+}
+
+static void TestPrintSignedFast32() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIdFAST32, int_fast32_t(-342178));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "-342178"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIiFAST32, int_fast32_t(5719283));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "5719283"));
+}
+
+static void TestPrintSignedFast64() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIdFAST64,
+                 int_fast64_t(-INT64_C(432157943248732)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "-432157943248732"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIiFAST64, int_fast64_t(INT64_C(325719232983)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "325719232983"));
+}
+
+static void TestPrintSignedFastN() {
+  TestPrintSignedFast8();
+  TestPrintSignedFast16();
+  TestPrintSignedFast32();
+  TestPrintSignedFast64();
+}
+
+static void TestPrintSignedMax() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIdMAX, intmax_t(-INTMAX_C(432157943248732)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "-432157943248732"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIiMAX, intmax_t(INTMAX_C(325719232983)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "325719232983"));
+}
+
+static void TestPrintSignedPtr() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIdPTR,
+                 intptr_t(reinterpret_cast<void*>(12345678)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "12345678"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIiPTR,
+                 intptr_t(reinterpret_cast<void*>(87654321)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "87654321"));
+}
+
+static void TestPrintSigned() {
+  TestPrintSignedN();
+  TestPrintSignedLeastN();
+  TestPrintSignedFastN();
+  TestPrintSignedMax();
+  TestPrintSignedPtr();
+}
+
+/*
+ * The fprintf macros for unsigned integers are:
+ *
+ *   PRIoN   PRIoLEASTN   PRIoFASTN   PRIoMAX   PRIoPTR
+ *   PRIuN   PRIuLEASTN   PRIuFASTN   PRIuMAX   PRIuPTR
+ *   PRIxN   PRIxLEASTN   PRIxFASTN   PRIxMAX   PRIxPTR
+ *   PRIXN   PRIXLEASTN   PRIXFASTN   PRIXMAX   PRIXPTR
+ *
+ * In these names N is the width of the type as described in C99 7.18.1.
+ */
+
+static void TestPrintUnsigned8() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIo8, uint8_t(042));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "42"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIu8, uint8_t(17));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "17"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIx8, uint8_t(0x2a));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "2a"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIX8, uint8_t(0xCD));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "CD"));
+}
+
+static void TestPrintUnsigned16() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIo16, uint16_t(04242));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "4242"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIu16, uint16_t(1717));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "1717"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIx16, uint16_t(0x2a2a));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "2a2a"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIX16, uint16_t(0xCDCD));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "CDCD"));
+}
+
+static void TestPrintUnsigned32() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIo32, uint32_t(0424242));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "424242"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIu32, uint32_t(171717));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "171717"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIx32, uint32_t(0x2a2a2a));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "2a2a2a"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIX32, uint32_t(0xCDCDCD));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "CDCDCD"));
+}
+
+static void TestPrintUnsigned64() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIo64, uint64_t(UINT64_C(0424242424242)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "424242424242"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIu64, uint64_t(UINT64_C(17171717171717171717)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "17171717171717171717"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIx64, uint64_t(UINT64_C(0x2a2a2a2a2a2a2a)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "2a2a2a2a2a2a2a"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIX64, uint64_t(UINT64_C(0xCDCDCDCDCDCD)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "CDCDCDCDCDCD"));
+}
+
+static void TestPrintUnsignedN() {
+  TestPrintUnsigned8();
+  TestPrintUnsigned16();
+  TestPrintUnsigned32();
+  TestPrintUnsigned64();
+}
+
+static void TestPrintUnsignedLeast8() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIoLEAST8, uint_least8_t(042));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "42"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIuLEAST8, uint_least8_t(17));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "17"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIxLEAST8, uint_least8_t(0x2a));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "2a"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIXLEAST8, uint_least8_t(0xCD));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "CD"));
+}
+
+static void TestPrintUnsignedLeast16() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIoLEAST16, uint_least16_t(04242));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "4242"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIuLEAST16, uint_least16_t(1717));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "1717"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIxLEAST16, uint_least16_t(0x2a2a));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "2a2a"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIXLEAST16, uint_least16_t(0xCDCD));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "CDCD"));
+}
+
+static void TestPrintUnsignedLeast32() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIoLEAST32, uint_least32_t(0424242));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "424242"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIuLEAST32, uint_least32_t(171717));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "171717"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIxLEAST32, uint_least32_t(0x2a2a2a));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "2a2a2a"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIXLEAST32, uint_least32_t(0xCDCDCD));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "CDCDCD"));
+}
+
+static void TestPrintUnsignedLeast64() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIoLEAST64,
+                 uint_least64_t(UINT64_C(0424242424242)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "424242424242"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIuLEAST64,
+                 uint_least64_t(UINT64_C(17171717171717171717)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "17171717171717171717"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIxLEAST64,
+                 uint_least64_t(UINT64_C(0x2a2a2a2a2a2a2a)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "2a2a2a2a2a2a2a"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIXLEAST64,
+                 uint_least64_t(UINT64_C(0xCDCDCDCDCDCD)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "CDCDCDCDCDCD"));
+}
+
+static void TestPrintUnsignedLeastN() {
+  TestPrintUnsignedLeast8();
+  TestPrintUnsignedLeast16();
+  TestPrintUnsignedLeast32();
+  TestPrintUnsignedLeast64();
+}
+
+static void TestPrintUnsignedFast8() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIoFAST8, uint_fast8_t(042));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "42"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIuFAST8, uint_fast8_t(17));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "17"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIxFAST8, uint_fast8_t(0x2a));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "2a"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIXFAST8, uint_fast8_t(0xCD));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "CD"));
+}
+
+static void TestPrintUnsignedFast16() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIoFAST16, uint_fast16_t(04242));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "4242"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIuFAST16, uint_fast16_t(1717));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "1717"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIxFAST16, uint_fast16_t(0x2a2a));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "2a2a"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIXFAST16, uint_fast16_t(0xCDCD));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "CDCD"));
+}
+
+static void TestPrintUnsignedFast32() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIoFAST32, uint_fast32_t(0424242));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "424242"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIuFAST32, uint_fast32_t(171717));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "171717"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIxFAST32, uint_fast32_t(0x2a2a2a));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "2a2a2a"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIXFAST32, uint_fast32_t(0xCDCDCD));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "CDCDCD"));
+}
+
+static void TestPrintUnsignedFast64() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIoFAST64,
+                 uint_fast64_t(UINT64_C(0424242424242)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "424242424242"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIuFAST64,
+                 uint_fast64_t(UINT64_C(17171717171717171717)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "17171717171717171717"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIxFAST64,
+                 uint_fast64_t(UINT64_C(0x2a2a2a2a2a2a2a)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "2a2a2a2a2a2a2a"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIXFAST64,
+                 uint_fast64_t(UINT64_C(0xCDCDCDCDCDCD)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "CDCDCDCDCDCD"));
+}
+
+static void TestPrintUnsignedFastN() {
+  TestPrintUnsignedFast8();
+  TestPrintUnsignedFast16();
+  TestPrintUnsignedFast32();
+  TestPrintUnsignedFast64();
+}
+
+static void TestPrintUnsignedMax() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIoMAX, uintmax_t(UINTMAX_C(432157943248732)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "14220563454333534"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIuMAX, uintmax_t(UINTMAX_C(325719232983)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "325719232983"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIxMAX, uintmax_t(UINTMAX_C(327281321873)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "4c337ca791"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIXMAX, uintmax_t(UINTMAX_C(912389523743523)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "33DD03D75A323"));
+}
+
+static void TestPrintUnsignedPtr() {
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIoPTR,
+                 uintptr_t(reinterpret_cast<void*>(12345678)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "57060516"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIuPTR,
+                 uintptr_t(reinterpret_cast<void*>(87654321)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "87654321"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIxPTR,
+                 uintptr_t(reinterpret_cast<void*>(0x4c3a791)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "4c3a791"));
+
+  PoisonOutput();
+  SprintfLiteral(gOutput, "%" PRIXPTR,
+                 uintptr_t(reinterpret_cast<void*>(0xF328DB)));
+  MOZ_RELEASE_ASSERT(!strcmp(gOutput, "F328DB"));
+}
+
+static void TestPrintUnsigned() {
+  TestPrintUnsignedN();
+  TestPrintUnsignedLeastN();
+  TestPrintUnsignedFastN();
+  TestPrintUnsignedMax();
+  TestPrintUnsignedPtr();
+}
+
+static void TestPrint() {
+  TestPrintSigned();
+  TestPrintUnsigned();
+}
+
+/*
+ * The fscanf macros for signed integers are:
+ *
+ *   SCNdN   SCNdLEASTN   SCNdFASTN   SCNdMAX   SCNdPTR
+ *   SCNiN   SCNiLEASTN   SCNiFASTN   SCNiMAX   SCNiPTR
+ *
+ * In these names N is the width of the type as described in C99 7.18.1.
+ */
+
+/*
+ * MSVC's scanf is insufficiently powerful to implement all the SCN* macros.
+ * Rather than support some subset of them, we instead support none of them.
+ * See the comment at the top of IntegerPrintfMacros.h.  But in case we ever do
+ * support them, the following tests should adequately test implementation
+ * correctness.  (Indeed, these tests *revealed* MSVC's limitations.)
+ *
+ * That said, even if MSVC ever picks up complete support, we still probably
+ * don't want to support these, because of the undefined-behavior issue noted
+ * further down in the comment atop IntegerPrintfMacros.h.
+ */
+#define SHOULD_TEST_SCANF_MACROS 0
+
+#if SHOULD_TEST_SCANF_MACROS
+
+/*
+ * glibc header definitions for SCN{d,i,o,u,x}{,LEAST,FAST}8 use the "hh" length
+ * modifier, which is new in C99 (and C++11, by reference).  We compile this
+ * file as C++11, so if "hh" is used in these macros, it's standard.  But some
+ * versions of gcc wrongly think it isn't and warn about a "non-standard"
+ * modifier.  And since these tests mostly exist to verify format-macro/type
+ * consistency (particularly through compiler warnings about incorrect formats),
+ * these warnings are unacceptable.  So for now, compile tests for those macros
+ * only if we aren't compiling with gcc.
+ */
+#  define SHOULD_TEST_8BIT_FORMAT_MACROS (!(MOZ_IS_GCC))
+
+template <typename T>
+union Input {
+  T mI;
+  unsigned char mPun[16];
+};
+
+template <typename T>
+static void PoisonInput(Input<T>& aInput) {
+  memset(aInput.mPun, 0xDA, sizeof(aInput.mPun));
+}
+
+template <typename T>
+static bool ExtraBitsUntouched(const Input<T>& aInput) {
+  for (size_t i = sizeof(aInput.mI); i < sizeof(aInput); i++) {
+    if (aInput.mPun[i] != 0xDA) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+static void TestScanSigned8() {
+#  if SHOULD_TEST_8BIT_FORMAT_MACROS
+  Input<int8_t> u;
+
+  PoisonInput(u);
+  sscanf("-17", "%" SCNd8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == -17);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("042", "%" SCNi8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 042);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+#  endif
+}
+
+static void TestScanSigned16() {
+  Input<int16_t> u;
+
+  PoisonInput(u);
+  sscanf("-1742", "%" SCNd16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == -1742);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("04217", "%" SCNi16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 04217);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanSigned32() {
+  Input<int32_t> u;
+
+  PoisonInput(u);
+  sscanf("-174257", "%" SCNd32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == -174257);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("0423571", "%" SCNi32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 0423571);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanSigned64() {
+  Input<int64_t> u;
+
+  PoisonInput(u);
+  sscanf("-17425238927232", "%" SCNd64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == -INT64_C(17425238927232));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("042333576571", "%" SCNi64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == INT64_C(042333576571));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanSignedN() {
+  TestScanSigned8();
+  TestScanSigned16();
+  TestScanSigned32();
+  TestScanSigned64();
+}
+
+static void TestScanSignedLeast8() {
+#  if SHOULD_TEST_8BIT_FORMAT_MACROS
+  Input<int_least8_t> u;
+
+  PoisonInput(u);
+  sscanf("-17", "%" SCNdLEAST8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == -17);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("042", "%" SCNiLEAST8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 042);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+#  endif
+}
+
+static void TestScanSignedLeast16() {
+  Input<int_least16_t> u;
+
+  PoisonInput(u);
+  sscanf("-1742", "%" SCNdLEAST16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == -1742);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("04217", "%" SCNiLEAST16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 04217);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanSignedLeast32() {
+  Input<int_least32_t> u;
+
+  PoisonInput(u);
+  sscanf("-174257", "%" SCNdLEAST32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == -174257);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("0423571", "%" SCNiLEAST32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 0423571);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanSignedLeast64() {
+  Input<int_least64_t> u;
+
+  PoisonInput(u);
+  sscanf("-17425238927232", "%" SCNdLEAST64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == -INT64_C(17425238927232));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("042333576571", "%" SCNiLEAST64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == INT64_C(042333576571));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanSignedLeastN() {
+  TestScanSignedLeast8();
+  TestScanSignedLeast16();
+  TestScanSignedLeast32();
+  TestScanSignedLeast64();
+}
+
+static void TestScanSignedFast8() {
+#  if SHOULD_TEST_8BIT_FORMAT_MACROS
+  Input<int_fast8_t> u;
+
+  PoisonInput(u);
+  sscanf("-17", "%" SCNdFAST8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == -17);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("042", "%" SCNiFAST8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 042);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+#  endif
+}
+
+static void TestScanSignedFast16() {
+  Input<int_fast16_t> u;
+
+  PoisonInput(u);
+  sscanf("-1742", "%" SCNdFAST16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == -1742);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("04217", "%" SCNiFAST16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 04217);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanSignedFast32() {
+  Input<int_fast32_t> u;
+
+  PoisonInput(u);
+  sscanf("-174257", "%" SCNdFAST32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == -174257);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("0423571", "%" SCNiFAST32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 0423571);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanSignedFast64() {
+  Input<int_fast64_t> u;
+
+  PoisonInput(u);
+  sscanf("-17425238927232", "%" SCNdFAST64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == -INT64_C(17425238927232));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("042333576571", "%" SCNiFAST64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == INT64_C(042333576571));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanSignedFastN() {
+  TestScanSignedFast8();
+  TestScanSignedFast16();
+  TestScanSignedFast32();
+  TestScanSignedFast64();
+}
+
+static void TestScanSignedMax() {
+  Input<intmax_t> u;
+
+  PoisonInput(u);
+  sscanf("-432157943248732", "%" SCNdMAX, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == -INTMAX_C(432157943248732));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("04233357236571", "%" SCNiMAX, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == INTMAX_C(04233357236571));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanSignedPtr() {
+  Input<intptr_t> u;
+
+  PoisonInput(u);
+  sscanf("12345678", "%" SCNdPTR, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == intptr_t(reinterpret_cast<void*>(12345678)));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("04233357236", "%" SCNiPTR, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == intptr_t(reinterpret_cast<void*>(04233357236)));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanSigned() {
+  TestScanSignedN();
+  TestScanSignedLeastN();
+  TestScanSignedFastN();
+  TestScanSignedMax();
+  TestScanSignedPtr();
+}
+
+/*
+ * The fscanf macros for unsigned integers are:
+ *
+ *   SCNoN   SCNoLEASTN   SCNoFASTN   SCNoMAX   SCNoPTR
+ *   SCNuN   SCNuLEASTN   SCNuFASTN   SCNuMAX   SCNuPTR
+ *   SCNxN   SCNxLEASTN   SCNxFASTN   SCNxMAX   SCNxPTR
+ *
+ * In these names N is the width of the type as described in C99 7.18.1.
+ */
+
+static void TestScanUnsigned8() {
+#  if SHOULD_TEST_8BIT_FORMAT_MACROS
+  Input<uint8_t> u;
+
+  PoisonInput(u);
+  sscanf("17", "%" SCNo8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 017);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("42", "%" SCNu8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 42);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("2A", "%" SCNx8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 0x2A);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+#  endif
+}
+
+static void TestScanUnsigned16() {
+  Input<uint16_t> u;
+
+  PoisonInput(u);
+  sscanf("1742", "%" SCNo16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 01742);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("4217", "%" SCNu16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 4217);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("2ABC", "%" SCNx16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 0x2ABC);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanUnsigned32() {
+  Input<uint32_t> u;
+
+  PoisonInput(u);
+  sscanf("17421742", "%" SCNo32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 017421742);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("4217867", "%" SCNu32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 4217867);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("2ABCBEEF", "%" SCNx32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 0x2ABCBEEF);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanUnsigned64() {
+  Input<uint64_t> u;
+
+  PoisonInput(u);
+  sscanf("17421742173", "%" SCNo64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == UINT64_C(017421742173));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("421786713579", "%" SCNu64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == UINT64_C(421786713579));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("DEADBEEF7457E", "%" SCNx64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == UINT64_C(0xDEADBEEF7457E));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanUnsignedN() {
+  TestScanUnsigned8();
+  TestScanUnsigned16();
+  TestScanUnsigned32();
+  TestScanUnsigned64();
+}
+
+static void TestScanUnsignedLeast8() {
+#  if SHOULD_TEST_8BIT_FORMAT_MACROS
+  Input<uint_least8_t> u;
+
+  PoisonInput(u);
+  sscanf("17", "%" SCNoLEAST8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 017);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("42", "%" SCNuLEAST8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 42);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("2A", "%" SCNxLEAST8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 0x2A);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+#  endif
+}
+
+static void TestScanUnsignedLeast16() {
+  Input<uint_least16_t> u;
+
+  PoisonInput(u);
+  sscanf("1742", "%" SCNoLEAST16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 01742);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("4217", "%" SCNuLEAST16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 4217);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("2ABC", "%" SCNxLEAST16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 0x2ABC);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanUnsignedLeast32() {
+  Input<uint_least32_t> u;
+
+  PoisonInput(u);
+  sscanf("17421742", "%" SCNoLEAST32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 017421742);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("4217867", "%" SCNuLEAST32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 4217867);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("2ABCBEEF", "%" SCNxLEAST32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 0x2ABCBEEF);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanUnsignedLeast64() {
+  Input<uint_least64_t> u;
+
+  PoisonInput(u);
+  sscanf("17421742173", "%" SCNoLEAST64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == UINT64_C(017421742173));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("421786713579", "%" SCNuLEAST64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == UINT64_C(421786713579));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("DEADBEEF7457E", "%" SCNxLEAST64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == UINT64_C(0xDEADBEEF7457E));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanUnsignedLeastN() {
+  TestScanUnsignedLeast8();
+  TestScanUnsignedLeast16();
+  TestScanUnsignedLeast32();
+  TestScanUnsignedLeast64();
+}
+
+static void TestScanUnsignedFast8() {
+#  if SHOULD_TEST_8BIT_FORMAT_MACROS
+  Input<uint_fast8_t> u;
+
+  PoisonInput(u);
+  sscanf("17", "%" SCNoFAST8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 017);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("42", "%" SCNuFAST8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 42);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("2A", "%" SCNxFAST8, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 0x2A);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+#  endif
+}
+
+static void TestScanUnsignedFast16() {
+  Input<uint_fast16_t> u;
+
+  PoisonInput(u);
+  sscanf("1742", "%" SCNoFAST16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 01742);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("4217", "%" SCNuFAST16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 4217);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("2ABC", "%" SCNxFAST16, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 0x2ABC);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanUnsignedFast32() {
+  Input<uint_fast32_t> u;
+
+  PoisonInput(u);
+  sscanf("17421742", "%" SCNoFAST32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 017421742);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("4217867", "%" SCNuFAST32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 4217867);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("2ABCBEEF", "%" SCNxFAST32, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == 0x2ABCBEEF);
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanUnsignedFast64() {
+  Input<uint_fast64_t> u;
+
+  PoisonInput(u);
+  sscanf("17421742173", "%" SCNoFAST64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == UINT64_C(017421742173));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("421786713579", "%" SCNuFAST64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == UINT64_C(421786713579));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("DEADBEEF7457E", "%" SCNxFAST64, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == UINT64_C(0xDEADBEEF7457E));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanUnsignedFastN() {
+  TestScanUnsignedFast8();
+  TestScanUnsignedFast16();
+  TestScanUnsignedFast32();
+  TestScanUnsignedFast64();
+}
+
+static void TestScanUnsignedMax() {
+  Input<uintmax_t> u;
+
+  PoisonInput(u);
+  sscanf("14220563454333534", "%" SCNoMAX, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == UINTMAX_C(432157943248732));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("432157943248732", "%" SCNuMAX, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == UINTMAX_C(432157943248732));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("4c337ca791", "%" SCNxMAX, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == UINTMAX_C(327281321873));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanUnsignedPtr() {
+  Input<uintptr_t> u;
+
+  PoisonInput(u);
+  sscanf("57060516", "%" SCNoPTR, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == uintptr_t(reinterpret_cast<void*>(12345678)));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("87654321", "%" SCNuPTR, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == uintptr_t(reinterpret_cast<void*>(87654321)));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+
+  PoisonInput(u);
+  sscanf("4c3a791", "%" SCNxPTR, &u.mI);
+  MOZ_RELEASE_ASSERT(u.mI == uintptr_t(reinterpret_cast<void*>(0x4c3a791)));
+  MOZ_RELEASE_ASSERT(ExtraBitsUntouched(u));
+}
+
+static void TestScanUnsigned() {
+  TestScanUnsignedN();
+  TestScanUnsignedLeastN();
+  TestScanUnsignedFastN();
+  TestScanUnsignedMax();
+  TestScanUnsignedPtr();
+}
+
+static void TestScan() {
+  TestScanSigned();
+  TestScanUnsigned();
+}
+
+#endif /* SHOULD_TEST_SCANF_MACROS */
+
+#if defined(XP_WIN)
+int wmain()
+#else
+int main()
+#endif  // defined(XP_WIN)
+{
+  TestPrint();
+#if SHOULD_TEST_SCANF_MACROS
+  TestScan();
+#endif
+  return 0;
+}