63 lines
2 KiB
D
63 lines
2 KiB
D
// Copyright Ferdinand Majerech 2014.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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/// Backward compatibility with std.stream (which was used by D:YAML API in the past).
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module dyaml.streamcompat;
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import std.stream;
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import tinyendian;
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/// A streamToBytes wrapper that allocates memory using the GC.
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///
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/// See_Also: streamToBytes
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ubyte[] streamToBytesGC(Stream stream) @trusted nothrow
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{
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try return stream.streamToBytes(new ubyte[stream.available]);
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catch(Exception e)
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{
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assert(false, "Unexpected exception in streamToBytesGC: " ~ e.msg);
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}
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}
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/// Read all data from a std.stream.Stream into an array of bytes.
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///
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/// Params:
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///
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/// stream = Stream to read from. Must be readable and seekable.
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/// memory = Memory to use. Must be long enough to store the entire stream
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/// (memory.length >= stream.available).
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///
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/// Returns: A slice of memory containing all contents of the stream on success.
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/// NULL if unable to read the entire stream.
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ubyte[] streamToBytes(Stream stream, ubyte[] memory) @system nothrow
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{
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try
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{
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assert(stream.readable && stream.seekable,
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"Can't read YAML from a stream that is not readable and seekable");
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assert(memory.length >= stream.available,
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"Not enough memory passed to streamToBytes");
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auto buffer = memory[0 .. stream.available];
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size_t bytesRead = 0;
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for(; bytesRead < buffer.length;)
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{
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// Returns 0 on eof
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const bytes = stream.readBlock(&buffer[bytesRead], buffer.length - bytesRead);
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// Reached EOF before reading buffer.length bytes.
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if(bytes == 0) { return null; }
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bytesRead += bytes;
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}
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return buffer;
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}
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catch(Exception e)
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{
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assert(false, "Unexpected exception in streamToBytes " ~ e.msg);
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}
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}
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