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kicad/new/sch_lib.h

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/*
* This program source code file is part of KICAD, a free EDA CAD application.
*
* Copyright (C) 2010 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
* Copyright (C) 2010 Kicad Developers, see change_log.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
*/
#ifndef SCH_LIB_H_
#define SCH_LIB_H_
#include <utf8.h>
#include <richio.h>
namespace SCH {
class LPID;
class PART;
class LIB_TABLE;
/**
* Class LIB_SOURCE
* is an abstract class from which implementation specific LIB_SOURCEs
* may be derived, one for each kind of library type allowed in the library table.
* The class name stems from the fact that this interface only provides READ ONLY
* functions.
*
* @author Dick Hollenbeck
*/
class LIB_SOURCE
{
friend class LIBS; ///< the LIB factory is thru LIB_TABLE::LookupPart()
friend class LIB; ///< the LIB uses these functions.
protected: ///< derived classes must implement
/**
* Function GetSourceType
* returns the library table entry's type for this library source.
*/
const STRING& GetSourceType() { return sourceType; }
/**
* Function GetSourceURI
* returns absolute location of the library source.
*/
const STRING& GetSourceURI() { return sourceURI; }
//-----<abstract for implementors>---------------------------------------
/**
* Function ReadPart
* fetches @a aPartName's s-expression into @a aResult after clear()ing aResult.
*/
virtual void ReadPart( STR_UTF* aResult, const STRING& aPartName, const STRING& aRev = "" )
throw( IO_ERROR ) = 0;
/**
* Function ReadParts
* fetches the s-expressions for each part given in @a aPartNames, into @a aResults,
* honoring the array indices respectfully.
* @param aPartNames is a list of part names, one name per list element. If a part name
* does not have a version string, then the most recent version is fetched.
* @param aResults receives the s-expressions
*/
virtual void ReadParts( STR_UTFS* aResults, const STRINGS& aPartNames )
throw( IO_ERROR ) = 0;
/**
* Function GetCategories
* fetches all categories present in the library source into @a aResults
*/
virtual void GetCategories( STRINGS* aResults )
throw( IO_ERROR ) = 0;
/**
* Function GetCategoricalPartNames
* fetches all the part names for @a aCategory, which was returned by GetCategories().
*
* @param aCategory is a subdividing navigator within the library source,
* but may default to empty which will be taken to mean all categories.
*
* @param aResults is a place to put the fetched result, one category per STRING.
*/
virtual void GetCategoricalPartNames( STRINGS* aResults, const STRING& aCategory="" )
throw( IO_ERROR ) = 0;
/**
* Function GetRevisions
* fetches all revisions for @a aPartName into @a aResults. Revisions are strings
* like "rev12", "rev279", and are library source agnostic. These do not have to be
* in a contiguous order, but the first 3 characters must be "rev" and subsequent
* characters must consist of at least one decimal digit. If the LIB_SOURCE
* does not support revisions, it is allowed to return a single "" string as
* the only result. This means aPartName is present in the libsource, only once
* without a revision. This is a special case.
*/
virtual void GetRevisions( STRINGS* aResults, const STRING& aPartName )
throw( IO_ERROR ) = 0;
/**
* Function FindParts
* fetches part names for all parts matching the criteria given in @a
* aQuery, into @a aResults. The query string is designed to be easily marshalled,
* i.e. serialized, so that long distance queries can be made with minimal overhead.
* The library source needs to have an intelligent friend on the other end if
* the actual library data is remotely located, otherwise it will be too slow
* to honor this portion of the API contract.
*
* @param aQuery is a string holding a domain specific query language expression.
* One candidate here is an s-expression that uses (and ..) and (or ..) operators
* and uses them as RPN. For example "(and (footprint 0805)(value 33ohm)(category passives))".
* The UI can shield the user from this if it wants.
*
* @param aResults is a place to put the fetched part names, one part per STRING.
*/
virtual void FindParts( STRINGS* aResults, const STRING& aQuery )
throw( IO_ERROR ) = 0;
//-----</abstract for implementors>--------------------------------------
protected:
STRING sourceType;
STRING sourceURI;
};
/**
* Class LIB_SINK
* is an abstract class from which implementation specific LIB_SINKs
* may be derived, one for each kind of library type in the library table that
* supports writing. The class name stems from the fact that this interface
* only provides WRITE functions.
*
* @author Dick Hollenbeck
*/
class LIB_SINK
{
friend class LIB; ///< only the LIB uses these functions.
protected: ///< derived classes must implement
/**
* Function GetSinkType
* returns the library table entry's type for this library sink.
*/
const STRING& GetSinkType() { return sinkType; }
/**
* Function GetSinkURI
* returns absolute location of the library sink.
*/
const STRING& GetSinkURI() { return sinkURI; }
/**
* Function WritePart
* saves the part to non-volatile storage. @a aPartName may have the revision
* portion present. If it is not present, and a overwrite of an existhing
* part is done, then LIB::ReloadPart() must be called on this same part
* and all parts that inherit it must be reparsed.
* @return STRING - if the LIB_SINK support revision numbering, then return a
* revision name that was next in the sequence, e.g. "rev22", else "".
*/
virtual STRING WritePart( const STRING& aPartName, const STRING& aSExpression )
throw( IO_ERROR ) = 0;
protected:
STRING sinkType;
STRING sinkURI;
};
class PARTS;
/**
* Class LIB
* is a cache of parts, and because the LIB_SOURCE is abstracted, there
* should be no need to extend from this class in any case except for the
* PARTS_LIST.
*
* @author Dick Hollenbeck
*/
class LIB
{
friend class LIB_TABLE; ///< protected constructor, LIB_TABLE may construct
protected: // constructor is not public, called from LIB_TABLE only.
/**
* Constructor LIB
* is not public and is only called from class LIB_TABLE
*
* @param aLogicalLibrary is the name of a well known logical library, and is
* known because it already exists in the library table.
*
* @param aSource is an open LIB_SOURCE whose ownership is
* given over to this LIB.
*
* @param aSink is an open LIB_SINK whose ownership is given over
* to this LIB, and it is normally NULL.
*/
LIB( const STRING& aLogicalLibrary, LIB_SOURCE* aSource, LIB_SINK* aSink = NULL );
public:
~LIB();
/**
* Function HasSink
* returns true if this library has write/save capability. Most LIBs
* are read only.
*/
bool HasSink() { return sink != NULL; }
/**
* Function LogicalName
* returns the logical name of this LIB.
*/
STRING LogicalName();
//-----<use delegates: source and sink>---------------------------------
/**
* Function LookupPart
* returns a PART given @a aPartName, such as "passives/R". No ownership
* is given to the PART, it stays in the cache that is this LIB.
*
* @param aLPID is the part to lookup. The logicalLibName can be empty in it
* since yes, we know which LIB is in play.
*
* @param aLibTable is the LIB_TABLE view that is in effect for inheritance,
* and comes from the big containing SCHEMATIC object.
*
* @return PART* - The desired PART and will never be NULL. No ownership is
* given to caller. PARTs always reside in the cache that is a LIB.
*
* @throw IO_ERROR if the part cannot be found or loaded.
*/
PART* LookupPart( const LPID& aLPID, LIB_TABLE* aLibTable )
throw( IO_ERROR );
/**
* Function ReloadPart
* will reload the part assuming the library source has a changed content
* for it.
*/
void ReloadPart( PART* aPart ) throw( IO_ERROR );
/**
* Function GetCategories
* returns all categories of parts within this LIB into @a aResults.
*/
STRINGS GetCategories() throw( IO_ERROR );
/**
* Function GetCategoricalPartNames
* returns the part names for @a aCategory, and at the same time
* creates cache entries for the very same parts if they do not already exist
* in this LIB (i.e. cache).
*/
STRINGS GetCategoricalPartNames( const STRING& aCategory = "" ) throw( IO_ERROR );
//-----<.use delegates: source and sink>--------------------------------
/**
* Function WritePart
* saves the part to non-volatile storage and returns the next new revision
* name in the sequence established by the LIB_SINK.
*/
STRING WritePart( PART* aPart ) throw( IO_ERROR );
void SetPartBody( PART* aPart, const STRING& aSExpression ) throw( IO_ERROR );
/**
* Function GetRevisions
* returns the revisions of @a aPartName that are present in this LIB.
* The returned STRINGS will look like "rev1", "rev2", etc.
*/
STRINGS GetRevisions( const STRING& aPartName ) throw( IO_ERROR );
/**
* Function FindParts
* returns part names for all parts matching the criteria given in @a
* aQuery, into @a aResults. The query string is designed to be easily marshalled,
* i.e. serialized, so that long distance queries can be made with minimal overhead.
* The library source needs to have an intelligent friend on the other end if
* the actual library data is remotely located, otherwise it will be too slow
* to honor this portion of the API contract.
*
* @param aQuery is a string holding a domain specific language expression. One candidate
* here is an RPN s-expression that uses (and ..) and (or ..) operators. For example
* "(and (footprint 0805)(value 33ohm)(category passives))"
*/
STRINGS FindParts( const STRING& aQuery ) throw( IO_ERROR )
{
// run the query on the cached data first for any PARTS which are fully
// parsed (i.e. cached), then on the LIB_SOURCE to find any that
// are not fully parsed, then unify the results.
return STRINGS();
}
#if defined(DEBUG)
static void Test( int argc, char** argv ) throw( IO_ERROR );
#endif
protected:
STR_UTF fetch; // scratch, used to fetch things, grows to worst case size.
STR_UTFS vfetch; // scratch, used to fetch things.
STRING logicalName;
LIB_SOURCE* source;
LIB_SINK* sink;
STRINGS categories;
bool cachedCategories; /// < is true only after reading categories
/** parts are in various states of readiness:
* 1) not even loaded (if cachedParts is false)
* 2) present, but without member 'body' having been read() yet.
* 3) body has been read, but not parsed yet.
* 4) parsed and inheritance if any has been applied.
*/
PARTS* parts;
/**
* Function lookupPart
* looks up a PART, returns NULL if cannot find in source. Does not parse
* the part. Does not even load the part's Sweet string. No ownership
* is given to the PART, it stays in the cache that is this LIB.
*
* @throw IO_ERROR if there is some kind of communications error reading
* the original list of parts.
*
* @return PART* - the cached PART, or NULL if not found. No ownership transferred.
*/
const PART* lookupPart( const LPID& aLPID ) throw( IO_ERROR );
};
} // namespace SCH
#endif // SCH_LIB_H_
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