Add a new ?syntax option to syntax highlight output.

[cycript.git] / Highlight.cpp

diff --git a/Highlight.cpp b/Highlight.cpp
new file mode 100644 (file)
index 0000000..371722e
--- /dev/null
+++ b/Highlight.cpp
@@ -0,0 +1,93 @@
+/* Cycript - Optimizing JavaScript Compiler/Runtime
+ * Copyright (C) 2009-2012  Jay Freeman (saurik)
+*/
+
+/* GNU Lesser General Public License, Version 3 {{{ */
+/*
+ * Cycript is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Cycript is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
+**/
+/* }}} */
+
+#include "Highlight.hpp"
+
+#include "Cycript.tab.hh"
+#include "Parser.hpp"
+
+static void Skip(const char *data, size_t size, std::ostream &output, size_t &offset, cy::position &current, cy::position target) {
+    while (current.line != target.line || current.column != target.column) {
+        _assert(offset != size);
+        char next(data[offset++]);
+
+        output.put(next);
+
+        _assert(current.line < target.line || current.line == target.line && current.column < target.column);
+        if (next == '\n')
+            current.lines();
+        else
+            current.columns();
+    }
+}
+
+struct CYColor {
+    bool bold_;
+    unsigned code_;
+
+    CYColor() {
+    }
+
+    CYColor(bool bold, unsigned code) :
+        bold_(bold),
+        code_(code)
+    {
+    }
+};
+
+void CYLexerHighlight(const char *data, size_t size, std::ostream &output) {
+    CYStream stream(data, data + size);
+    CYDriver driver(stream);
+
+    size_t offset(0);
+    cy::position current;
+
+    CYLocalPool pool;
+
+    YYSTYPE value;
+    cy::location location;
+
+    while (cylex(&value, &location, driver.scanner_) != 0) {
+        CYColor color;
+
+        switch (value.highlight_) {
+            case hi::Comment: color = CYColor(true, 30); break;
+            case hi::Constant: color = CYColor(false, 31); break;
+            case hi::Control: color = CYColor(false, 33); break;
+            case hi::Escape: color = CYColor(true, 31); break;
+            case hi::Identifier: color = CYColor(false, 0); break;
+            case hi::Meta: color = CYColor(false, 32); break;
+            case hi::Nothing: color = CYColor(false, 0); break;
+            case hi::Operator: color = CYColor(false, 36); break;
+            case hi::Structure: color = CYColor(true, 34); break;
+            case hi::Type: color = CYColor(true, 34); break;
+        }
+
+        Skip(data, size, output, offset, current, location.begin);
+        if (color.code_ != 0)
+            output << "\e[" << (color.bold_ ? '1' : '0') << ";" << color.code_ << "m";
+        Skip(data, size, output, offset, current, location.end);
+        if (color.code_ != 0)
+            output << "\e[0m";
+    }
+
+    output.write(data + offset, size - offset);
+}