mirror of
https://github.com/id-Software/DOOM-3-BFG.git
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304 lines
11 KiB
C++
304 lines
11 KiB
C++
/*
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===========================================================================
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Doom 3 BFG Edition GPL Source Code
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Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company.
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This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").
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Doom 3 BFG Edition Source Code is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 BFG Edition Source Code is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Doom 3 BFG Edition Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code. If not, please request a copy in writing from id Software at the address below.
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If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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===========================================================================
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*/
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#ifndef __PARSER_H__
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#define __PARSER_H__
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/*
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===============================================================================
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C/C++ compatible pre-compiler
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===============================================================================
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*/
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#define DEFINE_FIXED 0x0001
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#define BUILTIN_LINE 1
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#define BUILTIN_FILE 2
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#define BUILTIN_DATE 3
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#define BUILTIN_TIME 4
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#define BUILTIN_STDC 5
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#define INDENT_IF 0x0001
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#define INDENT_ELSE 0x0002
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#define INDENT_ELIF 0x0004
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#define INDENT_IFDEF 0x0008
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#define INDENT_IFNDEF 0x0010
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// macro definitions
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typedef struct define_s
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{
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char* name; // define name
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int flags; // define flags
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int builtin; // > 0 if builtin define
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int numparms; // number of define parameters
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idToken* parms; // define parameters
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idToken* tokens; // macro tokens (possibly containing parm tokens)
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struct define_s* next; // next defined macro in a list
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struct define_s* hashnext; // next define in the hash chain
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} define_t;
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// indents used for conditional compilation directives:
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// #if, #else, #elif, #ifdef, #ifndef
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typedef struct indent_s
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{
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int type; // indent type
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int skip; // true if skipping current indent
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idLexer* script; // script the indent was in
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struct indent_s* next; // next indent on the indent stack
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} indent_t;
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class idParser
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{
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public:
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// constructor
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idParser();
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idParser( int flags );
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idParser( const char* filename, int flags = 0, bool OSPath = false );
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idParser( const char* ptr, int length, const char* name, int flags = 0 );
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// destructor
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~idParser();
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// load a source file
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int LoadFile( const char* filename, bool OSPath = false );
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// load a source from the given memory with the given length
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// NOTE: the ptr is expected to point at a valid C string: ptr[length] == '\0'
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int LoadMemory( const char* ptr, int length, const char* name );
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// free the current source
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void FreeSource( bool keepDefines = false );
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// returns true if a source is loaded
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int IsLoaded() const
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{
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return idParser::loaded;
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}
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// read a token from the source
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int ReadToken( idToken* token );
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// expect a certain token, reads the token when available
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int ExpectTokenString( const char* string );
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// expect a certain token type
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int ExpectTokenType( int type, int subtype, idToken* token );
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// expect a token
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int ExpectAnyToken( idToken* token );
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// returns true if the next token equals the given string and removes the token from the source
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int CheckTokenString( const char* string );
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// returns true if the next token equals the given type and removes the token from the source
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int CheckTokenType( int type, int subtype, idToken* token );
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// returns true if the next token equals the given string but does not remove the token from the source
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int PeekTokenString( const char* string );
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// returns true if the next token equals the given type but does not remove the token from the source
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int PeekTokenType( int type, int subtype, idToken* token );
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// skip tokens until the given token string is read
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int SkipUntilString( const char* string );
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// skip the rest of the current line
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int SkipRestOfLine();
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// skip the braced section
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int SkipBracedSection( bool parseFirstBrace = true );
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// parse a braced section into a string
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const char* ParseBracedSection( idStr& out, int tabs, bool parseFirstBrace, char intro, char outro );
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// parse a braced section into a string, maintaining indents and newlines
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const char* ParseBracedSectionExact( idStr& out, int tabs = -1 );
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// parse the rest of the line
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const char* ParseRestOfLine( idStr& out );
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// unread the given token
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void UnreadToken( idToken* token );
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// read a token only if on the current line
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int ReadTokenOnLine( idToken* token );
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// read a signed integer
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int ParseInt();
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// read a boolean
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bool ParseBool();
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// read a floating point number
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float ParseFloat();
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// parse matrices with floats
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int Parse1DMatrix( int x, float* m );
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int Parse2DMatrix( int y, int x, float* m );
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int Parse3DMatrix( int z, int y, int x, float* m );
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// get the white space before the last read token
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int GetLastWhiteSpace( idStr& whiteSpace ) const;
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// Set a marker in the source file (there is only one marker)
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void SetMarker();
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// Get the string from the marker to the current position
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void GetStringFromMarker( idStr& out, bool clean = false );
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// add a define to the source
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int AddDefine( const char* string );
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// add builtin defines
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void AddBuiltinDefines();
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// set the source include path
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void SetIncludePath( const char* path );
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// set the punctuation set
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void SetPunctuations( const punctuation_t* p );
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// returns a pointer to the punctuation with the given id
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const char* GetPunctuationFromId( int id );
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// get the id for the given punctuation
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int GetPunctuationId( const char* p );
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// set lexer flags
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void SetFlags( int flags );
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// get lexer flags
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int GetFlags() const;
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// returns the current filename
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const char* GetFileName() const;
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// get current offset in current script
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const int GetFileOffset() const;
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// get file time for current script
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const ID_TIME_T GetFileTime() const;
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// returns the current line number
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const int GetLineNum() const;
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// print an error message
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void Error( VERIFY_FORMAT_STRING const char* str, ... ) const;
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// print a warning message
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void Warning( VERIFY_FORMAT_STRING const char* str, ... ) const;
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// returns true if at the end of the file
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bool EndOfFile();
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// add a global define that will be added to all opened sources
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static int AddGlobalDefine( const char* string );
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// remove the given global define
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static int RemoveGlobalDefine( const char* name );
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// remove all global defines
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static void RemoveAllGlobalDefines();
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// set the base folder to load files from
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static void SetBaseFolder( const char* path );
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private:
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int loaded; // set when a source file is loaded from file or memory
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idStr filename; // file name of the script
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idStr includepath; // path to include files
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bool OSPath; // true if the file was loaded from an OS path
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const punctuation_t* punctuations; // punctuations to use
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int flags; // flags used for script parsing
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idLexer* scriptstack; // stack with scripts of the source
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idToken* tokens; // tokens to read first
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define_t* defines; // list with macro definitions
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define_t** definehash; // hash chain with defines
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indent_t* indentstack; // stack with indents
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int skip; // > 0 if skipping conditional code
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const char* marker_p;
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static define_t* globaldefines; // list with global defines added to every source loaded
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private:
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void PushIndent( int type, int skip );
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void PopIndent( int* type, int* skip );
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void PushScript( idLexer* script );
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int ReadSourceToken( idToken* token );
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int ReadLine( idToken* token );
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int UnreadSourceToken( idToken* token );
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int ReadDefineParms( define_t* define, idToken** parms, int maxparms );
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int StringizeTokens( idToken* tokens, idToken* token );
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int MergeTokens( idToken* t1, idToken* t2 );
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int ExpandBuiltinDefine( idToken* deftoken, define_t* define, idToken** firsttoken, idToken** lasttoken );
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int ExpandDefine( idToken* deftoken, define_t* define, idToken** firsttoken, idToken** lasttoken );
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int ExpandDefineIntoSource( idToken* deftoken, define_t* define );
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void AddGlobalDefinesToSource();
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define_t* CopyDefine( define_t* define );
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define_t* FindHashedDefine( define_t** definehash, const char* name );
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int FindDefineParm( define_t* define, const char* name );
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void AddDefineToHash( define_t* define, define_t** definehash );
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static void PrintDefine( define_t* define );
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static void FreeDefine( define_t* define );
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static define_t* FindDefine( define_t* defines, const char* name );
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static define_t* DefineFromString( const char* string );
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define_t* CopyFirstDefine();
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int Directive_include();
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int Directive_undef();
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int Directive_if_def( int type );
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int Directive_ifdef();
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int Directive_ifndef();
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int Directive_else();
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int Directive_endif();
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// DG: use int instead of long for 64bit compatibility
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int EvaluateTokens( idToken* tokens, signed int* intvalue, double* floatvalue, int integer );
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int Evaluate( signed int* intvalue, double* floatvalue, int integer );
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int DollarEvaluate( signed int* intvalue, double* floatvalue, int integer );
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// DG end
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int Directive_define();
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int Directive_elif();
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int Directive_if();
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int Directive_line();
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int Directive_error();
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int Directive_warning();
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int Directive_pragma();
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void UnreadSignToken();
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int Directive_eval();
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int Directive_evalfloat();
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int ReadDirective();
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int DollarDirective_evalint();
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int DollarDirective_evalfloat();
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int ReadDollarDirective();
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};
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ID_INLINE const char* idParser::GetFileName() const
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{
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if( idParser::scriptstack )
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{
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return idParser::scriptstack->GetFileName();
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}
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else
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{
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return "";
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}
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}
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ID_INLINE const int idParser::GetFileOffset() const
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{
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if( idParser::scriptstack )
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{
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return idParser::scriptstack->GetFileOffset();
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}
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else
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{
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return 0;
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}
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}
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ID_INLINE const ID_TIME_T idParser::GetFileTime() const
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{
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if( idParser::scriptstack )
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{
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return idParser::scriptstack->GetFileTime();
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}
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else
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{
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return 0;
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}
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}
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ID_INLINE const int idParser::GetLineNum() const
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{
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if( idParser::scriptstack )
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{
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return idParser::scriptstack->GetLineNum();
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}
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else
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{
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return 0;
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}
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}
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#endif /* !__PARSER_H__ */
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