*: add "noexcept" to many, many function prototypes

This eliminates some overhead, because the compiler doesn't need to
consider these functions throwing.

src/input/plugins/CdioParanoiaInputPlugin.cxx

@@ -96,7 +96,7 @@ class CdioParanoiaInputStream final : public InputStream {
 	}
 
 	/* virtual methods from InputStream */
-	bool IsEOF() override;
+	bool IsEOF() noexcept override;
 	size_t Read(void *ptr, size_t size) override;
 	void Seek(offset_type offset) override;
 };
@@ -340,7 +340,7 @@ CdioParanoiaInputStream::Read(void *ptr, size_t length)
 }
 
 bool
-CdioParanoiaInputStream::IsEOF()
+CdioParanoiaInputStream::IsEOF() noexcept
 {
 	return lsn_from + lsn_relofs > lsn_to;
 }

src/input/plugins/FfmpegInputPlugin.cxx

@@ -59,7 +59,7 @@ struct FfmpegInputStream final : public InputStream {
 	}
 
 	/* virtual methods from InputStream */
-	bool IsEOF() override;
+	bool IsEOF() noexcept override;
 	size_t Read(void *ptr, size_t size) override;
 	void Seek(offset_type offset) override;
 };
@@ -118,7 +118,7 @@ FfmpegInputStream::Read(void *ptr, size_t read_size)
 }
 
 bool
-FfmpegInputStream::IsEOF()
+FfmpegInputStream::IsEOF() noexcept
 {
 	return eof;
 }

src/input/plugins/FileInputPlugin.cxx

@@ -45,7 +45,7 @@ public:
 
 	/* virtual methods from InputStream */
 
-	bool IsEOF() override {
+	bool IsEOF() noexcept override {
 		return GetOffset() >= GetSize();
 	}
 

src/input/plugins/RewindInputPlugin.cxx

@@ -59,7 +59,7 @@ public:
 			ProxyInputStream::Update();
 	}
 
-	bool IsEOF() override {
+	bool IsEOF() noexcept override {
 		return !ReadingFromBuffer() && ProxyInputStream::IsEOF();
 	}
 

src/input/plugins/SmbclientInputPlugin.cxx

@@ -55,7 +55,7 @@ public:
 
 	/* virtual methods from InputStream */
 
-	bool IsEOF() override {
+	bool IsEOF() noexcept override {
 		return offset >= size;
 	}