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diff --git a/utils/idftools/idf_helpers.h b/utils/idftools/idf_helpers.h
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+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2014  Cirilo Bernardo
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#ifndef IDF_HELPERS_H
+#define IDF_HELPERS_H
+
+#include <wx/wx.h>
+#include <fstream>
+#include <string>
+#include <idf_common.h>
+
+/**
+ * Macro TO_UTF8
+ * converts a wxString to a UTF8 encoded C string for all wxWidgets build modes.
+ * wxstring is a wxString, not a wxT() or _().  The scope of the return value
+ * is very limited and volatile, but can be used with printf() style functions well.
+ * NOTE: Taken from KiCad include/macros.h
+ */
+#define TO_UTF8( wxstring )  ( (const char*) (wxstring).utf8_str() )
+
+/**
+ * function FROM_UTF8
+ * converts a UTF8 encoded C string to a wxString for all wxWidgets build modes.
+ * NOTE: Taken from KiCad include/macros.h
+ */
+static inline wxString FROM_UTF8( const char* cstring )
+{
+    wxString line = wxString::FromUTF8( cstring );
+
+    if( line.IsEmpty() )  // happens when cstring is not a valid UTF8 sequence
+        line = wxConvCurrent->cMB2WC( cstring );    // try to use locale conversion
+
+        return line;
+}
+
+
+#define ERROR_IDF std::cerr << "* " << __FILE__ << ":" << __LINE__ << ":" << __FUNCTION__ << "(): "
+
+// minimum drill diameters / slot widths to be represented in the IDF output
+#define IDF_MIN_DIA_MM ( 0.001 )
+#define IDF_MIN_DIA_THOU ( 0.00039 )
+#define IDF_MIN_DIA_TNM ( 100 )
+
+// conversion from thou to mm
+#define IDF_THOU_TO_MM 0.0254
+// conversion from TNM to mm
+#define IDF_TNM_TO_MM 0.00001
+
+namespace IDF3
+{
+
+/**
+ *  Function FetchIDFLine
+ *  retrieves a single line from an IDF file and performs minimal processing. If a comment symbol
+ *  is encountered then it is removed and a single leading space is removed if present; all trailing
+ *  spaces are removed. If the line is not a comment then all leading and trailing spaces are stripped.
+ *
+ * @param aModel is an open IDFv3 file
+ * @param aLine (output) is the line retrieved from the file
+ * @param isComment (output) is set to true if the line is a comment
+ * @param aFilePos (output) is set to the beginning of the line in case the file needs to be rewound
+ *
+ * @return bool: true if a line was read and was not empty; otherwise false
+ */
+bool FetchIDFLine( std::ifstream& aModel, std::string& aLine, bool& isComment, std::streampos& aFilePos );
+
+
+/**
+ * Function GetIDFString
+ * parses a line retrieved via FetchIDFLine() and returns the first IDF string found from the starting
+ * point aIndex
+ *
+ * @param aLine is the line to parse
+ * @param aIDFString (output) is the IDF string retrieved
+ * @param hasQuotes (output) is true if the string was in quotation marks
+ * @param aIndex (input/output) is the index into the input line
+ *
+ * @return bool: true if a string was retrieved, otherwise false
+ */
+bool GetIDFString( const std::string& aLine, std::string& aIDFString,
+                   bool& hasQuotes, int& aIndex );
+
+/**
+ * Function CompareToken
+ * performs a case-insensitive comparison of a token string and an input string
+ *
+ * @param aToken is an IDF token such as ".HEADER"
+ * @param aInputString is a string typically retrieved via GetIDFString
+ *
+ * @return bool: true if the token and input string match
+ */
+bool CompareToken( const char* aTokenString, const std::string& aInputString );
+
+
+/**
+ * Function ParseOwner
+ * parses the input string for a valid IDF Owner type
+ *
+ * @param aToken is the string to be parsed
+ * @param aOwner (output) is the IDF Owner class
+ *
+ * @return bool: true if a valid OWNER was found, otherwise false
+ */
+bool ParseOwner( const std::string& aToken, IDF3::KEY_OWNER& aOwner );
+
+
+/**
+ * Function ParseIDFLayer
+ * parses an input string for a valid IDF layer specification
+ *
+ * @param aToken is the string to be parsed
+ * @param aLayer (output) is the IDF Layer type or group
+ *
+ * @return bool: true if a valid IDF Layer type was found, otherwise false
+ */
+bool ParseIDFLayer( const std::string& aToken, IDF3::IDF_LAYER& aLayer );
+
+
+/**
+ * Function WriteLayersText
+ * writes out text corresponding to the given IDF Layer type
+ *
+ * @param aBoardFile is an IDFv3 file open for output
+ * @param aLayer is the IDF Layer type
+ *
+ * @return bool: true if the data was successfully written, otherwise false
+ */
+bool WriteLayersText( std::ofstream& aBoardFile, IDF3::IDF_LAYER aLayer );
+
+
+/**
+ * Function GetPlacementString
+ * returns a string representing the given IDF Placement type
+ *
+ * @param aPlacement is the IDF placement type to encode as a string
+ *
+ * @return string: the string representation of aPlacement
+ */
+std::string GetPlacementString( IDF3::IDF_PLACEMENT aPlacement );
+
+
+/**
+ * Function GetLayerString
+ * returns a string representing the given IDF Layer type
+ *
+ * @param aLayer is the IDF layer type to encode as a string
+ *
+ * @return string: the string representation of aLayer
+ */
+std::string GetLayerString( IDF3::IDF_LAYER aLayer );
+
+std::string GetOwnerString( IDF3::KEY_OWNER aOwner );
+}
+
+#endif // IDF_HELPERS_H