From 53f40448901ffe0d953c81939d031c63cdf3779a Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Fri, 26 Dec 2014 13:40:17 +0100
Subject: [PATCH] util/{ASCII,UriUtil}, ...: work around
 -Wtautological-pointer-compare

New in clang 3.6.
---
 NEWS                   | 1 +
 src/DatabaseGlue.cxx   | 3 +++
 src/DecoderPlugin.cxx  | 6 ++++++
 src/Directory.cxx      | 3 +++
 src/InputStream.cxx    | 6 ++++++
 src/SongFilter.cxx     | 3 +++
 src/fs/Charset.cxx     | 6 ++++++
 src/fs/Traits.cxx      | 6 ++++++
 src/tag/TagBuilder.cxx | 9 +++++++++
 src/util/ASCII.hxx     | 6 ++++++
 src/util/UriUtil.cxx   | 3 +++
 11 files changed, 52 insertions(+)

diff --git a/NEWS b/NEWS
index dc51ab6fb..df37e6ceb 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,5 @@
 ver 0.18.22 (not yet released)
+* fix clang 3.6 warnings
 
 ver 0.18.21 (2014/12/17)
 * playlist
diff --git a/src/DatabaseGlue.cxx b/src/DatabaseGlue.cxx
index fb41b40b7..50deaf48e 100644
--- a/src/DatabaseGlue.cxx
+++ b/src/DatabaseGlue.cxx
@@ -112,7 +112,10 @@ db_get_root(void)
 Directory *
 db_get_directory(const char *name)
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(name != nullptr);
+#endif
 
 	if (db == nullptr)
 		return nullptr;
diff --git a/src/DecoderPlugin.cxx b/src/DecoderPlugin.cxx
index 77ed90882..5170555f5 100644
--- a/src/DecoderPlugin.cxx
+++ b/src/DecoderPlugin.cxx
@@ -26,7 +26,10 @@
 bool
 DecoderPlugin::SupportsSuffix(const char *suffix) const
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(suffix != nullptr);
+#endif
 
 	return suffixes != nullptr && string_array_contains(suffixes, suffix);
 
@@ -35,7 +38,10 @@ DecoderPlugin::SupportsSuffix(const char *suffix) const
 bool
 DecoderPlugin::SupportsMimeType(const char *mime_type) const
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(mime_type != nullptr);
+#endif
 
 	return mime_types != nullptr &&
 		string_array_contains(mime_types, mime_type);
diff --git a/src/Directory.cxx b/src/Directory.cxx
index b2942588e..238bd149c 100644
--- a/src/Directory.cxx
+++ b/src/Directory.cxx
@@ -40,7 +40,10 @@ extern "C" {
 inline Directory *
 Directory::Allocate(const char *path)
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(path != nullptr);
+#endif
 
 	const size_t path_size = strlen(path) + 1;
 	Directory *directory =
diff --git a/src/InputStream.cxx b/src/InputStream.cxx
index 28a0aad1a..73b581d2d 100644
--- a/src/InputStream.cxx
+++ b/src/InputStream.cxx
@@ -155,7 +155,10 @@ InputStream::IsAvailable()
 size_t
 InputStream::Read(void *ptr, size_t _size, Error &error)
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(ptr != nullptr);
+#endif
 	assert(_size > 0);
 
 	return plugin.read(this, ptr, _size, error);
@@ -164,7 +167,10 @@ InputStream::Read(void *ptr, size_t _size, Error &error)
 size_t
 InputStream::LockRead(void *ptr, size_t _size, Error &error)
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(ptr != nullptr);
+#endif
 	assert(_size > 0);
 
 	const ScopeLock protect(mutex);
diff --git a/src/SongFilter.cxx b/src/SongFilter.cxx
index 235dfe7a0..01f9d8bb2 100644
--- a/src/SongFilter.cxx
+++ b/src/SongFilter.cxx
@@ -78,7 +78,10 @@ SongFilter::Item::Item(unsigned _tag, const char *_value, bool _fold_case)
 bool
 SongFilter::Item::StringMatch(const char *s) const
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(s != nullptr);
+#endif
 
 	if (fold_case) {
 		char *p = g_utf8_casefold(s, -1);
diff --git a/src/fs/Charset.cxx b/src/fs/Charset.cxx
index dad5779f9..0b598ef46 100644
--- a/src/fs/Charset.cxx
+++ b/src/fs/Charset.cxx
@@ -79,7 +79,10 @@ GetFSCharset()
 std::string
 PathToUTF8(const char *path_fs)
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(path_fs != nullptr);
+#endif
 
 	if (fs_charset.empty())
 		return std::string(path_fs);
@@ -109,7 +112,10 @@ PathToUTF8(const char *path_fs)
 char *
 PathFromUTF8(const char *path_utf8)
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(path_utf8 != nullptr);
+#endif
 
 	if (fs_charset.empty())
 		return g_strdup(path_utf8);
diff --git a/src/fs/Traits.cxx b/src/fs/Traits.cxx
index 2c3ce075b..47cb5aee3 100644
--- a/src/fs/Traits.cxx
+++ b/src/fs/Traits.cxx
@@ -25,7 +25,10 @@
 const char *
 PathTraits::GetBaseUTF8(const char *p)
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(p != nullptr);
+#endif
 
 	const char *slash = strrchr(p, SEPARATOR_UTF8);
 	return slash != nullptr
@@ -36,7 +39,10 @@ PathTraits::GetBaseUTF8(const char *p)
 std::string
 PathTraits::GetParentUTF8(const char *p)
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(p != nullptr);
+#endif
 
 	const char *slash = strrchr(p, SEPARATOR_UTF8);
 	return slash != nullptr
diff --git a/src/tag/TagBuilder.cxx b/src/tag/TagBuilder.cxx
index 25e5cc24b..083b43d69 100644
--- a/src/tag/TagBuilder.cxx
+++ b/src/tag/TagBuilder.cxx
@@ -77,7 +77,10 @@ TagBuilder::Commit()
 inline void
 TagBuilder::AddItemInternal(TagType type, const char *value, size_t length)
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(value != nullptr);
+#endif
 	assert(length > 0);
 
 	char *p = FixTagString(value, length);
@@ -98,7 +101,10 @@ TagBuilder::AddItemInternal(TagType type, const char *value, size_t length)
 void
 TagBuilder::AddItem(TagType type, const char *value, size_t length)
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(value != nullptr);
+#endif
 
 	if (length == 0 || ignore_tag_items[type])
 		return;
@@ -109,7 +115,10 @@ TagBuilder::AddItem(TagType type, const char *value, size_t length)
 void
 TagBuilder::AddItem(TagType type, const char *value)
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(value != nullptr);
+#endif
 
 	AddItem(type, value, strlen(value));
 }
diff --git a/src/util/ASCII.hxx b/src/util/ASCII.hxx
index cd26d9dec..9f7147338 100644
--- a/src/util/ASCII.hxx
+++ b/src/util/ASCII.hxx
@@ -43,8 +43,11 @@ gcc_pure gcc_nonnull_all
 static inline bool
 StringEqualsCaseASCII(const char *a, const char *b)
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(a != nullptr);
 	assert(b != nullptr);
+#endif
 
 	/* note: strcasecmp() depends on the locale, but for ASCII-only
 	   strings, it's safe to use */
@@ -55,8 +58,11 @@ gcc_pure gcc_nonnull_all
 static inline bool
 StringEqualsCaseASCII(const char *a, const char *b, size_t n)
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(a != nullptr);
 	assert(b != nullptr);
+#endif
 
 	/* note: strcasecmp() depends on the locale, but for ASCII-only
 	   strings, it's safe to use */
diff --git a/src/util/UriUtil.cxx b/src/util/UriUtil.cxx
index 1783fbca5..6dd5a42e1 100644
--- a/src/util/UriUtil.cxx
+++ b/src/util/UriUtil.cxx
@@ -128,8 +128,11 @@ uri_remove_auth(const char *uri)
 bool
 uri_is_child(const char *parent, const char *child)
 {
+#if !CLANG_CHECK_VERSION(3,6)
+	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(parent != nullptr);
 	assert(child != nullptr);
+#endif
 
 	const size_t parent_length = strlen(parent);
 	return memcmp(parent, child, parent_length) == 0 &&