1 files changed, 59 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/compiler/preprocessor/Input.h b/gfx/angle/checkout/src/compiler/preprocessor/Input.h
new file mode 100644
index 0000000000..6f42a112d4
--- /dev/null
+++ b/gfx/angle/checkout/src/compiler/preprocessor/Input.h
@@ -0,0 +1,59 @@
+//
+// Copyright 2011 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_PREPROCESSOR_INPUT_H_
+#define COMPILER_PREPROCESSOR_INPUT_H_
+
+#include <cstddef>
+#include <vector>
+
+namespace angle
+{
+
+namespace pp
+{
+
+// Holds and reads input for Lexer.
+class Input
+{
+  public:
+    Input();
+    ~Input();
+    Input(size_t count, const char *const string[], const int length[]);
+
+    size_t count() const { return mCount; }
+    const char *string(size_t index) const { return mString[index]; }
+    size_t length(size_t index) const { return mLength[index]; }
+
+    size_t read(char *buf, size_t maxSize, int *lineNo);
+
+    struct Location
+    {
+        size_t sIndex;  // String index;
+        size_t cIndex;  // Char index.
+
+        Location() : sIndex(0), cIndex(0) {}
+    };
+    const Location &readLoc() const { return mReadLoc; }
+
+  private:
+    // Skip a character and return the next character after the one that was skipped.
+    // Return nullptr if data runs out.
+    const char *skipChar();
+
+    // Input.
+    size_t mCount;
+    const char *const *mString;
+    std::vector<size_t> mLength;
+
+    Location mReadLoc;
+};
+
+}  // namespace pp
+
+}  // namespace angle
+
+#endif  // COMPILER_PREPROCESSOR_INPUT_H_