kicad/include/richio.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2007-2010 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
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* Copyright (C) 2016-2020 KiCad Developers, see AUTHORS.txt for contributors.
*
* 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
*/
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#ifndef RICHIO_H_
#define RICHIO_H_
// This file defines 3 classes useful for working with DSN text files and is named
// "richio" after its author, Richard Hollenbeck, aka Dick Hollenbeck.
#include <vector>
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#include <utf8.h>
// I really did not want to be dependent on wxWidgets in richio
// but the errorText needs to be wide char so wxString rules.
#include <cstdio>
#include <wx/string.h>
#include <wx/stream.h>
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#include <ki_exception.h>
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/**
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* This is like sprintf() but the output is appended to a std::string instead of to a
* character array.
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*
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* @param aResult is the string to append to, previous text is not clear()ed.
* @param aFormat is a printf() style format string.
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* @return the count of bytes appended to the result string, no terminating nul is included.
*/
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int
#if defined(__GNUG__)
__attribute__ ((format (printf, 2, 3)))
#endif
StrPrintf( std::string* aResult, const char* aFormat, ... );
/**
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* This is like sprintf() but the output is returned in a std::string instead of to a
* character array.
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*
* @param format is a printf() style format string.
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* @return std::string - the result of the sprintf().
*/
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std::string
#if defined(__GNUG__)
__attribute__ ((format (printf, 1, 2)))
#endif
StrPrintf( const char* format, ... );
/**
* Nominally opens a file and reads it into a string. But unlike other facilities, this handles
* mis-encded Wine-written files on macOS.
*
* @param aFilePath
* @param aReadType
* @throw IO_ERROR if the file can't be opened
* @return the file contents
*/
wxString SafeReadFile( const wxString& aFilePath, const wxString& aReadType );
#define LINE_READER_LINE_DEFAULT_MAX 1000000
#define LINE_READER_LINE_INITIAL_SIZE 5000
/**
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* An abstract class from which implementation specific LINE_READERs may be derived to
* read single lines of text and manage a line number counter.
*/
class LINE_READER
{
public:
/**
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* Build a line reader and fixes the length of the maximum supported line length
* to @a aMaxLineLength.
*/
LINE_READER( unsigned aMaxLineLength = LINE_READER_LINE_DEFAULT_MAX );
virtual ~LINE_READER();
/**
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* Read a line of text into the buffer and increments the line number counter.
*
* If the line is larger than the maximum length passed to the constructor, then an
* exception is thrown. The line is nul terminated.
*
* @return The beginning of the read line, or NULL if EOF.
* @throw IO_ERROR when a line is too long.
*/
virtual char* ReadLine() = 0;
/**
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* Returns the name of the source of the lines in an abstract sense.
*
* This may be a file or it may be the clipboard or any other source of lines of text.
* The returned string is useful for reporting error messages.
*/
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virtual const wxString& GetSource() const
{
return m_source;
}
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/**
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* Return a pointer to the last line that was read in.
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*/
char* Line() const
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{
return m_line;
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}
/**
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* A casting operator that returns a char* pointer to the start of the line buffer.
*/
operator char* () const
{
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return Line();
}
/**
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* Return the line number of the last line read from this LINE_READER.
*
* Lines start from 1.
*/
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virtual unsigned LineNumber() const
{
return m_lineNum;
}
/**
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* Return the number of bytes in the last line read from this LINE_READER.
*/
unsigned Length() const
{
return m_length;
}
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protected:
/**
* Will expand the capacity of @a line up to maxLineLength but not greater, so
* be careful about making assumptions of @a capacity after calling this.
*/
void expandCapacity( unsigned aNewsize );
unsigned m_length; ///< no. bytes in line before trailing nul.
unsigned m_lineNum;
char* m_line; ///< the read line of UTF8 text
unsigned m_capacity; ///< no. bytes allocated for line.
unsigned m_maxLineLength; ///< maximum allowed capacity using resizing.
wxString m_source; ///< origin of text lines, e.g. filename or "clipboard"
};
/**
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* A LINE_READER that reads from an open file.
*
* File must be already open so that this class can exist without any UI policy.
*/
class FILE_LINE_READER : public LINE_READER
{
public:
/**
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* Take @a aFileName and the size of the desired line buffer and opens the file and
* assumes the obligation to close it.
*
* @param aFileName is the name of the file to open and to use for error reporting purposes.
* @param aStartingLineNumber is the initial line number to report on error, and is
* accessible here for the case where multiple DSNLEXERs are reading from the
* same file in sequence, all from the same open file (with @a doOwn = false).
* Internally it is incremented by one after each ReadLine(), so the first
* reported line number will always be one greater than what is provided here.
* @param aMaxLineLength is the number of bytes to use in the line buffer.
*
* @throw IO_ERROR if @a aFileName cannot be opened.
*/
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FILE_LINE_READER( const wxString& aFileName, unsigned aStartingLineNumber = 0,
unsigned aMaxLineLength = LINE_READER_LINE_DEFAULT_MAX );
/**
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* Take an open FILE and the size of the desired line buffer and takes ownership of
* the open file, i.e. assumes the obligation to close it.
*
* @param aFile is an open file.
* @param aFileName is the name of the file for error reporting purposes.
* @param doOwn if true, means I should close the open file, else not.
* @param aStartingLineNumber is the initial line number to report on error, and is
* accessible here for the case where multiple DSNLEXERs are reading from the
* same file in sequence, all from the same open file (with @a doOwn = false).
* Internally it is incremented by one after each ReadLine(), so the first
* reported line number will always be one greater than what is provided here.
* @param aMaxLineLength is the number of bytes to use in the line buffer.
*/
FILE_LINE_READER( FILE* aFile, const wxString& aFileName, bool doOwn = true,
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unsigned aStartingLineNumber = 0,
unsigned aMaxLineLength = LINE_READER_LINE_DEFAULT_MAX );
/**
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* May or may not close the open file, depending on @a doOwn in constructor.
*/
~FILE_LINE_READER();
char* ReadLine() override;
/**
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* Rewind the file and resets the line number back to zero.
*
* Line number will go to 1 on first ReadLine().
*/
void Rewind()
{
rewind( m_fp );
m_lineNum = 0;
}
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long int FileLength();
long int CurPos();
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protected:
bool m_iOwn; ///< if I own the file, I'll promise to close it, else not.
FILE* m_fp; ///< I may own this file, but might not.
};
/**
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* Is a #LINE_READER that reads from a multiline 8 bit wide std::string
*/
class STRING_LINE_READER : public LINE_READER
{
protected:
std::string m_lines;
size_t m_ndx;
public:
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/**
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* Construct a string line reader.
*
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* @param aString is a source string consisting of one or more lines
* of text, where multiple lines are separated with a '\n' character.
* The last line does not necessarily need a trailing '\n'.
* @param aSource describes the source of aString for error reporting purposes
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* can be anything meaningful, such as wxT( "clipboard" ).
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*/
STRING_LINE_READER( const std::string& aString, const wxString& aSource );
/**
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* Construct a string line reader.
*
* Allows for a continuation of the reading of a stream started by another
* STRING_LINE_READER. Any stream offset and source name are used from
*/
STRING_LINE_READER( const STRING_LINE_READER& aStartingPoint );
char* ReadLine() override;
};
/**
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* A #LINE_READER that reads from a wxInputStream object.
*/
class INPUTSTREAM_LINE_READER : public LINE_READER
{
public:
/**
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* Construct a #LINE_READER from a wxInputStream object.
*
* @param aStream A pointer to a wxInputStream object to read.
* @param aSource The name of the stream source, for error reporting purposes.
*/
INPUTSTREAM_LINE_READER( wxInputStream* aStream, const wxString& aSource );
char* ReadLine() override;
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protected:
wxInputStream* m_stream; //< The input stream to read. No ownership of this pointer.
};
#define OUTPUTFMTBUFZ 500 ///< default buffer size for any OUTPUT_FORMATTER
/**
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* An interface used to output 8 bit text in a convenient way.
*
* The primary interface is "printf() - like" but with support for indentation control. The
* destination of the 8 bit wide text is up to the implementer.
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* <p>
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* The implementer only has to implement the write() function, but can also optionally
* re-implement GetQuoteChar().
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* <p>
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* If you want to output a wxString, then use TO_UTF8() on it before passing it as an
* argument to Print().
* <p>
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* Since this is an abstract interface, only classes derived from this one may actually be
* used.
*/
class OUTPUTFORMATTER
{
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protected:
OUTPUTFORMATTER( int aReserve = OUTPUTFMTBUFZ, char aQuoteChar = '"' ) :
m_buffer( aReserve, '\0' )
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{
quoteChar[0] = aQuoteChar;
quoteChar[1] = '\0';
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}
virtual ~OUTPUTFORMATTER() {}
/**
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* Perform quote character need determination according to the Specctra DSN specification.
* @param wrapee A string that might need wrapping on each end.
* @param quote_char A single character C string which provides the current
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* quote character, should it be needed by the wrapee.
*
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* @return the quote_char as a single character string, or "" if the wrapee does not need
* to be wrapped.
*/
static const char* GetQuoteChar( const char* wrapee, const char* quote_char );
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/**
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* Should be coded in the interface implementation (derived) classes.
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*
* @param aOutBuf is the start of a byte buffer to write.
* @param aCount tells how many bytes to write.
* @throw IO_ERROR, if there is a problem outputting, such as a full disk.
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*/
virtual void write( const char* aOutBuf, int aCount ) = 0;
#if defined(__GNUG__) // The GNU C++ compiler defines this
// When used on a C++ function, we must account for the "this" pointer,
// so increase the STRING-INDEX and FIRST-TO_CHECK by one.
// See http://docs.freebsd.org/info/gcc/gcc.info.Function_Attributes.html
// Then to get format checking during the compile, compile with -Wall or -Wformat
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#define PRINTF_FUNC __attribute__( ( format( printf, 3, 4 ) ) )
#else
#define PRINTF_FUNC // nothing
#endif
public:
/**
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* Format and write text to the output stream.
*
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* @param nestLevel The multiple of spaces to precede the output with.
* @param fmt A printf() style format string.
* @param ... a variable list of parameters that will get blended into
* the output under control of the format string.
* @return int - the number of characters output.
* @throw IO_ERROR, if there is a problem outputting, such as a full disk.
*/
int PRINTF_FUNC Print( int nestLevel, const char* fmt, ... );
/**
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* Perform quote character need determination.
*
* It returns the quote character as a single character string for a given input wrapee
* string. If the wrappee does not need to be quoted, the return value is "" (the null
* string), such as when there are no delimiters in the input wrapee string. If you want
* the quote_char to be assuredly not "", then pass in "(" as the wrappee.
* <p>
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* Implementations are free to override the default behavior, which is to call the static
* function of the same name.
*
* @param wrapee A string that might need wrapping on each end.
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* @return the quote_char as a single character string, or "" if the wrapee does not need
* to be wrapped.
*/
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virtual const char* GetQuoteChar( const char* wrapee ) const;
/**
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* Check \a aWrapee input string for a need to be quoted (e.g. contains a ')' character
* or a space), and for \" double quotes within the string that need to be escaped such
* that the DSNLEXER will correctly parse the string from a file later.
*
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* @param aWrapee is a string that might need wrapping in double quotes, and it might need
* to have its internal content escaped, or not.
* @return a std::string- whose c_str() function can be called for passing to printf()
* style functions that output UTF8 encoded s-expression streams.
*
* @throw IO_ERROR, if there is any kind of problem with the input string.
*/
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virtual std::string Quotes( const std::string& aWrapee ) const;
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std::string Quotew( const wxString& aWrapee ) const;
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private:
std::vector<char> m_buffer;
char quoteChar[2];
int sprint( const char* fmt, ... );
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int vprint( const char* fmt, va_list ap );
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};
/**
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* Implement an #OUTPUTFORMATTER to a memory buffer.
*
* After Print()ing the string is available through GetString()
*/
class STRING_FORMATTER : public OUTPUTFORMATTER
{
public:
/**
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* Reserve space in the buffer.
*/
STRING_FORMATTER( int aReserve = OUTPUTFMTBUFZ, char aQuoteChar = '"' ) :
OUTPUTFORMATTER( aReserve, aQuoteChar )
{
}
/**
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* Clear the buffer and empties the internal string.
*/
void Clear()
{
m_mystring.clear();
}
/**
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* Removes whitespace, '(', and ')' from the string.
*/
void StripUseless();
const std::string& GetString()
{
return m_mystring;
}
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protected:
void write( const char* aOutBuf, int aCount ) override;
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private:
std::string m_mystring;
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};
/**
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* Used for text file output.
*
* It is about 8 times faster than STREAM_OUTPUTFORMATTER for file streams.
*/
class FILE_OUTPUTFORMATTER : public OUTPUTFORMATTER
{
public:
/**
* @param aFileName is the full filename to open and save to as a text file.
* @param aMode is what you would pass to wxFopen()'s mode, defaults to wxT( "wt" )
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* for text files that are to be created here and now.
* @param aQuoteChar is a char used for quoting problematic strings (with whitespace or
* special characters in them).
* @throw IO_ERROR if the file cannot be opened.
*/
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FILE_OUTPUTFORMATTER( const wxString& aFileName, const wxChar* aMode = wxT( "wt" ),
char aQuoteChar = '"' );
~FILE_OUTPUTFORMATTER();
protected:
void write( const char* aOutBuf, int aCount ) override;
FILE* m_fp; ///< takes ownership
wxString m_filename;
};
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/**
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* Implement an #OUTPUTFORMATTER to a wxWidgets wxOutputStream.
*
* The stream is neither opened nor closed by this class.
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*/
class STREAM_OUTPUTFORMATTER : public OUTPUTFORMATTER
{
wxOutputStream& m_os;
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public:
/**
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* This can take any number of wxOutputStream derivations, so it can write to a file,
* socket, or zip file.
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*/
STREAM_OUTPUTFORMATTER( wxOutputStream& aStream, char aQuoteChar = '"' ) :
OUTPUTFORMATTER( OUTPUTFMTBUFZ, aQuoteChar ),
m_os( aStream )
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{
}
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protected:
void write( const char* aOutBuf, int aCount ) override;
};
#endif // RICHIO_H_