LibCore: Propagate errors from Stream::*_entire_buffer

Userland/Libraries/LibCore/InputBitStream.h

@@ -40,7 +40,7 @@ public:
         return m_stream.read(bytes);
     }
     virtual ErrorOr<size_t> write(ReadonlyBytes bytes) override { return m_stream.write(bytes); }
-    virtual bool write_entire_buffer(ReadonlyBytes bytes) override { return m_stream.write_entire_buffer(bytes); }
+    virtual ErrorOr<void> write_entire_buffer(ReadonlyBytes bytes) override { return m_stream.write_entire_buffer(bytes); }
     virtual bool is_eof() const override { return m_stream.is_eof() && !m_current_byte.has_value(); }
     virtual bool is_open() const override { return m_stream.is_open(); }
     virtual void close() override
@@ -155,7 +155,7 @@ public:
         return m_stream.read(bytes);
     }
     virtual ErrorOr<size_t> write(ReadonlyBytes bytes) override { return m_stream.write(bytes); }
-    virtual bool write_entire_buffer(ReadonlyBytes bytes) override { return m_stream.write_entire_buffer(bytes); }
+    virtual ErrorOr<void> write_entire_buffer(ReadonlyBytes bytes) override { return m_stream.write_entire_buffer(bytes); }
     virtual bool is_eof() const override { return m_stream.is_eof() && !m_current_byte.has_value(); }
     virtual bool is_open() const override { return m_stream.is_open(); }
     virtual void close() override

Userland/Libraries/LibCore/MemoryStream.h

@@ -79,13 +79,13 @@ public:
         m_offset += nwritten;
         return nwritten;
     }
-    virtual bool write_entire_buffer(ReadonlyBytes bytes) override
+    virtual ErrorOr<void> write_entire_buffer(ReadonlyBytes bytes) override
     {
         if (remaining() < bytes.size())
-            return false;
+            return Error::from_string_literal("Write of entire buffer ends past the memory area");
 
-        MUST(write(bytes));
-        return true;
+        TRY(write(bytes));
+        return {};
     }
 
     Bytes bytes()

Userland/Libraries/LibCore/Stream.cpp

@@ -23,14 +23,14 @@
 
 namespace Core::Stream {
 
-bool Stream::read_entire_buffer(Bytes buffer)
+ErrorOr<void> Stream::read_entire_buffer(Bytes buffer)
 {
     VERIFY(buffer.size());
 
     size_t nread = 0;
     do {
         if (is_eof())
-            return false;
+            return Error::from_string_literal("Reached end-of-file before filling the entire buffer");
 
         auto result = read(buffer.slice(nread));
         if (result.is_error()) {
@@ -38,13 +38,13 @@ bool Stream::read_entire_buffer(Bytes buffer)
                 continue;
             }
 
-            return false;
+            return result.release_error();
         }
 
         nread += result.value().size();
     } while (nread < buffer.size());
 
-    return true;
+    return {};
 }
 
 ErrorOr<ByteBuffer> Stream::read_until_eof(size_t block_size)
@@ -89,7 +89,7 @@ ErrorOr<void> Stream::discard(size_t discarded_bytes)
     return {};
 }
 
-bool Stream::write_entire_buffer(ReadonlyBytes buffer)
+ErrorOr<void> Stream::write_entire_buffer(ReadonlyBytes buffer)
 {
     VERIFY(buffer.size());
 
@@ -101,13 +101,13 @@ bool Stream::write_entire_buffer(ReadonlyBytes buffer)
                 continue;
             }
 
-            return false;
+            return result.release_error();
         }
 
         nwritten += result.value();
     } while (nwritten < buffer.size());
 
-    return true;
+    return {};
 }
 
 ErrorOr<off_t> SeekableStream::tell() const

Userland/Libraries/LibCore/Stream.h

@@ -35,7 +35,7 @@ public:
     virtual ErrorOr<Bytes> read(Bytes) = 0;
     /// Tries to fill the entire buffer through reading. Returns whether the
     /// buffer was filled without an error.
-    virtual bool read_entire_buffer(Bytes);
+    virtual ErrorOr<void> read_entire_buffer(Bytes);
     /// Reads the stream until EOF, storing the contents into a ByteBuffer which
     /// is returned once EOF is encountered. The block size determines the size
     /// of newly allocated chunks while reading.
@@ -51,7 +51,7 @@ public:
     virtual ErrorOr<size_t> write(ReadonlyBytes) = 0;
     /// Same as write, but does not return until either the entire buffer
     /// contents are written or an error occurs.
-    virtual bool write_entire_buffer(ReadonlyBytes);
+    virtual ErrorOr<void> write_entire_buffer(ReadonlyBytes);
 
     // This is a wrapper around `write_entire_buffer` that is compatible with
     // `write_or_error`. This is required by some templated code in LibProtocol
@@ -59,7 +59,7 @@ public:
     // TODO: Fully port or wrap `Request::stream_into_impl` into `Core::Stream` and remove this.
     bool write_or_error(ReadonlyBytes buffer)
     {
-        return write_entire_buffer(buffer);
+        return !write_entire_buffer(buffer).is_error();
     }
 
     /// Returns whether the stream has reached the end of file. For sockets,