82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
//===-- ResourceScriptToken.h -----------------------------------*- C++-*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===---------------------------------------------------------------------===//
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//
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// This declares the .rc script tokens and defines an interface for tokenizing
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// the input data. The list of available tokens is located at
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// ResourceScriptTokenList.def.
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//
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// Note that the tokenizer does not support preprocessor directives. The
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// preprocessor should do its work on the .rc file before running llvm-rc.
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//
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// As for now, it is possible to parse ASCII files only (the behavior on
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// UTF files might be undefined). However, it already consumes UTF-8 BOM, if
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// there is any. Thus, ASCII-compatible UTF-8 files are tokenized correctly.
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//
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// Ref: msdn.microsoft.com/en-us/library/windows/desktop/aa380599(v=vs.85).aspx
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//
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//===---------------------------------------------------------------------===//
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#ifndef LLVM_TOOLS_LLVMRC_RESOURCESCRIPTTOKEN_H
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#define LLVM_TOOLS_LLVMRC_RESOURCESCRIPTTOKEN_H
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/Error.h"
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#include <cstdint>
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#include <map>
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#include <string>
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#include <vector>
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namespace llvm {
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// A definition of a single resource script token. Each token has its kind
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// (declared in ResourceScriptTokenList) and holds a value - a reference
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// representation of the token.
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// RCToken does not claim ownership on its value. A memory buffer containing
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// the token value should be stored in a safe place and cannot be freed
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// nor reallocated.
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class RCToken {
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public:
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enum class Kind {
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#define TOKEN(Name) Name,
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#define SHORT_TOKEN(Name, Ch) Name,
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#include "ResourceScriptTokenList.def"
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};
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RCToken(RCToken::Kind RCTokenKind, StringRef Value);
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// Get an integer value of the integer token.
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uint32_t intValue() const;
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bool isLongInt() const;
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StringRef value() const;
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Kind kind() const;
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// Check if a token describes a binary operator.
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bool isBinaryOp() const;
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private:
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Kind TokenKind;
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StringRef TokenValue;
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};
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// Tokenize Input.
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// In case no error occurred, the return value contains
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// tokens in order they were in the input file.
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// In case of any error, the return value contains
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// a textual representation of error.
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//
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// Tokens returned by this function hold only references to the parts
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// of the Input. Memory buffer containing Input cannot be freed,
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// modified or reallocated.
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Expected<std::vector<RCToken>> tokenizeRC(StringRef Input);
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} // namespace llvm
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#endif
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