467 lines
17 KiB
C
467 lines
17 KiB
C
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#ifndef __LEXER_H__
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#define __LEXER_H__
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/*
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===============================================================================
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Lexicographical parser
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Does not use memory allocation during parsing. The lexer uses no
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memory allocation if a source is loaded with LoadMemory().
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However, idToken may still allocate memory for large strings.
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A number directly following the escape character '\' in a string is
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assumed to be in decimal format instead of octal. Binary numbers of
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the form 0b.. or 0B.. can also be used.
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===============================================================================
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*/
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// lexer flags
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typedef enum {
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LEXFL_NOERRORS = BIT(0), // don't print any errors
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LEXFL_NOWARNINGS = BIT(1), // don't print any warnings
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LEXFL_NOFATALERRORS = BIT(2), // errors aren't fatal
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LEXFL_NOSTRINGCONCAT = BIT(3), // multiple strings seperated by whitespaces are not concatenated
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LEXFL_NOSTRINGESCAPECHARS = BIT(4), // no escape characters inside strings
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LEXFL_NODOLLARPRECOMPILE = BIT(5), // don't use the $ sign for precompilation
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LEXFL_NOBASEINCLUDES = BIT(6), // don't include files embraced with < >
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LEXFL_ALLOWPATHNAMES = BIT(7), // allow path seperators in names
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LEXFL_ALLOWNUMBERNAMES = BIT(8), // allow names to start with a number
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LEXFL_ALLOWIPADDRESSES = BIT(9), // allow ip addresses to be parsed as numbers
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LEXFL_ALLOWFLOATEXCEPTIONS = BIT(10), // allow float exceptions like 1.#INF or 1.#IND to be parsed
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LEXFL_ALLOWMULTICHARLITERALS = BIT(11), // allow multi character literals
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LEXFL_ALLOWBACKSLASHSTRINGCONCAT = BIT(12), // allow multiple strings seperated by '\' to be concatenated
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LEXFL_ONLYSTRINGS = BIT(13), // parse as whitespace deliminated strings (quoted strings keep quotes)
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// RAVEN BEGIN
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// jsinger: added to support binary writing from the lexer in either byte swapped or non-byte swapped formats
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LEXFL_READBINARY = BIT(29), // read a byte code compiled version of the file
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LEXFL_BYTESWAP = BIT(30), // when writing the byte code compiled file, byte swap numbers
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LEXFL_WRITEBINARY = BIT(31) // write out a byte code compiled version of the file
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// RAVEN END
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} lexerFlags_t;
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// punctuation ids
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#define P_RSHIFT_ASSIGN 1
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#define P_LSHIFT_ASSIGN 2
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#define P_PARMS 3
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#define P_PRECOMPMERGE 4
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#define P_LOGIC_AND 5
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#define P_LOGIC_OR 6
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#define P_LOGIC_GEQ 7
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#define P_LOGIC_LEQ 8
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#define P_LOGIC_EQ 9
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#define P_LOGIC_UNEQ 10
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#define P_MUL_ASSIGN 11
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#define P_DIV_ASSIGN 12
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#define P_MOD_ASSIGN 13
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#define P_ADD_ASSIGN 14
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#define P_SUB_ASSIGN 15
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#define P_INC 16
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#define P_DEC 17
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#define P_BIN_AND_ASSIGN 18
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#define P_BIN_OR_ASSIGN 19
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#define P_BIN_XOR_ASSIGN 20
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#define P_RSHIFT 21
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#define P_LSHIFT 22
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#define P_POINTERREF 23
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#define P_CPP1 24
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#define P_CPP2 25
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#define P_MUL 26
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#define P_DIV 27
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#define P_MOD 28
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#define P_ADD 29
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#define P_SUB 30
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#define P_ASSIGN 31
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#define P_BIN_AND 32
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#define P_BIN_OR 33
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#define P_BIN_XOR 34
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#define P_BIN_NOT 35
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#define P_LOGIC_NOT 36
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#define P_LOGIC_GREATER 37
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#define P_LOGIC_LESS 38
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#define P_REF 39
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#define P_COMMA 40
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#define P_SEMICOLON 41
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#define P_COLON 42
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#define P_QUESTIONMARK 43
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#define P_PARENTHESESOPEN 44
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#define P_PARENTHESESCLOSE 45
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#define P_BRACEOPEN 46
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#define P_BRACECLOSE 47
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#define P_SQBRACKETOPEN 48
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#define P_SQBRACKETCLOSE 49
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#define P_BACKSLASH 50
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#define P_PRECOMP 51
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#define P_DOLLAR 52
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// RAVEN BEGIN
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#define P_INVERTED_PLING 53
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#define P_INVERTED_QUERY 54
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// RAVEN END
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// punctuation
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typedef struct punctuation_s
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{
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char *p; // punctuation character(s)
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int n; // punctuation id
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} punctuation_t;
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// RAVEN BEGIN
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#ifdef LEXER_READ_AHEAD
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class LexerIOWrapper {
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idFile *file;
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int offset;
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int size;
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char *memory;
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public:
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LexerIOWrapper();
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void InitFromMemory(char const * const ptr, int length);
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bool OpenFile(char const *filename, bool OSPath);
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int Length();
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int Tell();
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void Seek( int loc, int mode );
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void Read( void *dest, int s );
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void Close();
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int IsLoaded();
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};
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#endif
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class idLexer {
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friend class idParser;
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public:
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// RAVEN END
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// constructor
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idLexer();
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idLexer( int flags );
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idLexer( const char *filename, int flags = 0, bool OSPath = false );
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idLexer( const char *ptr, int length, const char *name, int flags = 0 );
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// destructor
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~idLexer();
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// load a script from the given file at the given offset with the given length
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int LoadFile( const char *filename, bool OSPath = false );
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// load a script from the given memory with the given length and a specified line offset,
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// so source strings extracted from a file can still refer to proper line numbers in the file
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// NOTE: the buffer is expect to be a valid C string: ptr[length] == '\0'
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int LoadMemory( const char *ptr, int length, const char *name, int startLine = 1 );
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// free the script
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void FreeSource( void );
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// returns true if a script is loaded
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int IsLoaded( void ) { return idLexer::loaded; }
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// read a token
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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 when the token is available
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int CheckTokenString( const char *string );
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// returns true an reads the token when a token with the given type is available
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int CheckTokenType( 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( void );
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// skip the braced section
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int SkipBracedSection( bool parseFirstBrace = true );
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// unread the given token
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void UnreadToken( const idToken *token );
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// read a token only if on the same line
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int ReadTokenOnLine( idToken *token );
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//Returns the rest of the current line
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const char* ReadRestOfLine(idStr& out);
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// read a signed integer
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int ParseInt( void );
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// read a boolean
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bool ParseBool( void );
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// read a floating point number. If errorFlag is NULL, a non-numeric token will
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// issue an Error(). If it isn't NULL, it will issue a Warning() and set *errorFlag = true
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float ParseFloat( bool *errorFlag = NULL );
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// parse matrices with floats
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int Parse1DMatrix( int x, float *m );
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// RAVEN BEGIN
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// rjohnson: added vertex color support to proc files. assume a default RGBA of 0x000000ff
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int Parse1DMatrixOpenEnded( int MaxCount, float *m );
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// RAVEN END
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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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// parse a braced section into a string
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const char * ParseBracedSection( idStr &out );
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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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// retrieves the white space characters before the last read token
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int GetLastWhiteSpace( idStr &whiteSpace ) const;
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// returns start index into text buffer of last white space
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int GetLastWhiteSpaceStart( void ) const;
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// returns end index into text buffer of last white space
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int GetLastWhiteSpaceEnd( void ) const;
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// set an array with punctuations, NULL restores default C/C++ set, see default_punctuations for an example
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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( void );
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// reset the lexer
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void Reset( void );
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// returns true if at the end of the file
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int EndOfFile( void );
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// returns the current filename
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const char * GetFileName( void );
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// get offset in script
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const int GetFileOffset( void );
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// get file time
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const unsigned int GetFileTime( void );
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// returns the current line number
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const int GetLineNum( void );
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// print an error message
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void Error( const char *str, ... ) id_attribute((format(printf,2,3)));
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// print a warning message
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void Warning( const char *str, ... ) id_attribute((format(printf,2,3)));
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// returns true if Error() was called with LEXFL_NOFATALERRORS or LEXFL_NOERRORS set
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bool HadError( void ) const;
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static void SetBaseFolder(char const * const);
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// RAVEN BEGIN
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// write a binary representation of a token
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void WriteBinaryToken(idToken *tok);
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static void WriteBinaryFile(char const * const filename);
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// RAVEN END
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// RAVEN BEGIN
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// dluetscher: added method to parse a structure array that is made up of numerics (floats, ints), and stores them in the given storage
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void ParseNumericStructArray( int numStructElements, int tokenSubTypeStructElements[], int arrayCount, byte *arrayStorage );
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// RAVEN END
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private:
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int loaded; // set when a script file is loaded from file or memory
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idStr filename; // file name of the script
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bool allocated; // true if buffer memory was allocated
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const char * buffer; // buffer containing the script
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const char * script_p; // current pointer in the script
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const char * end_p; // pointer to the end of the script
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const char * lastScript_p; // script pointer before reading token
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const char * whiteSpaceStart_p; // start of last white space
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const char * whiteSpaceEnd_p; // end of last white space
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unsigned int fileTime; // file time
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int length; // length of the script in bytes
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int line; // current line in script
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int lastline; // line before reading token
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int tokenavailable; // set by unreadToken
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int flags; // several script flags
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const punctuation_t *punctuations; // the punctuations used in the script
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int * punctuationtable; // ASCII table with punctuations
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int * nextpunctuation; // next punctuation in chain
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idToken token; // available token
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idLexer* next; // next script in a chain
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bool hadError; // set by idLexer::Error, even if the error is supressed
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protected:
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static char baseFolder[256];
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private:
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void CreatePunctuationTable( const punctuation_t *punctuations );
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int ReadWhiteSpace( void );
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int ReadEscapeCharacter( char *ch );
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int ReadString( idToken *token, int quote );
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int ReadName( idToken *token );
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int ReadNumber( idToken *token );
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int ReadPunctuation( idToken *token );
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int ReadPrimitive( idToken *token );
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int CheckString( const char *str ) const;
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int NumLinesCrossed( void );
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// RAVEN BEGIN
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// jsinger: This is the file that WriteBinaryToken will write to when the proper flags are set
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idFile *mBinaryFile;
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// RAVEN END
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};
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// this class is only necessary to parse binary files
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class Lexer {
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friend class idParser;
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public:
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#ifdef LEXER_READ_AHEAD
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static void BeginLevelLoad();
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static void EndLevelLoad();
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#endif
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// constructors
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Lexer( const char *filename, int flags = 0, bool OSPath = false );
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Lexer(int flags=0);
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Lexer( char const * const ptr, int length, char const * const name, int flags = 0);
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//destructor
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~Lexer();
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// load a script from the given file at the given offset with the given length
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int LoadFile( const char *filename, bool OSPath = false );
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// load a script from the given memory with the given length and a specified line offset,
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// so source strings extracted from a file can still refer to proper line numbers in the file
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// NOTE: the buffer is expect to be a valid C string: ptr[length] == '\0'
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int LoadMemory( const char *ptr, int length, const char *name, int startLine = 1 );
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// free the script
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void FreeSource( void );
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// returns true if a script is loaded
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int IsLoaded( void );
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// read a token
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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 when the token is available
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int CheckTokenString( const char *string );
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// returns true an reads the token when a token with the given type is available
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int CheckTokenType( 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( void );
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// skip the braced section
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int SkipBracedSection( bool parseFirstBrace = true );
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// unread the given token
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void UnreadToken( const idToken *token );
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// read a token only if on the same line
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int ReadTokenOnLine( idToken *token );
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// read a signed integer
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int ParseInt( void );
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// read a boolean
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bool ParseBool( void );
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// read a floating point number. If errorFlag is NULL, a non-numeric token will
|
||
|
|
// issue an Error(). If it isn't NULL, it will issue a Warning() and set *errorFlag = true
|
||
|
|
float ParseFloat( bool *errorFlag = NULL );
|
||
|
|
// parse matrices with floats
|
||
|
|
int Parse1DMatrix( int x, float *m );
|
||
|
|
int Parse1DMatrixOpenEnded( int MaxCount, float *m );
|
||
|
|
int Parse2DMatrix( int y, int x, float *m );
|
||
|
|
int Parse3DMatrix( int z, int y, int x, float *m );
|
||
|
|
// parse a braced section into a string
|
||
|
|
const char * ParseBracedSection( idStr &out );
|
||
|
|
// parse a braced section into a string, maintaining indents and newlines
|
||
|
|
const char * ParseBracedSectionExact ( idStr &out, int tabs = -1 );
|
||
|
|
// parse the rest of the line
|
||
|
|
const char * ParseRestOfLine( idStr &out );
|
||
|
|
// retrieves the white space characters before the last read token
|
||
|
|
int GetLastWhiteSpace( idStr &whiteSpace ) const;
|
||
|
|
// returns start index into text buffer of last white space
|
||
|
|
int GetLastWhiteSpaceStart( void ) const;
|
||
|
|
// returns end index into text buffer of last white space
|
||
|
|
int GetLastWhiteSpaceEnd( void ) const;
|
||
|
|
// set an array with punctuations, NULL restores default C/C++ set, see default_punctuations for an example
|
||
|
|
void SetPunctuations( const punctuation_t *p );
|
||
|
|
// returns a pointer to the punctuation with the given id
|
||
|
|
const char * GetPunctuationFromId( int id );
|
||
|
|
// get the id for the given punctuation
|
||
|
|
int GetPunctuationId( const char *p );
|
||
|
|
// set lexer flags
|
||
|
|
void SetFlags( int flags );
|
||
|
|
// get lexer flags
|
||
|
|
int GetFlags( void );
|
||
|
|
// reset the lexer
|
||
|
|
void Reset( void );
|
||
|
|
// returns true if at the end of the file
|
||
|
|
int EndOfFile( void );
|
||
|
|
// returns the current filename
|
||
|
|
const char * GetFileName( void );
|
||
|
|
// get offset in script
|
||
|
|
const int GetFileOffset( void );
|
||
|
|
// get file time
|
||
|
|
const unsigned int GetFileTime( void );
|
||
|
|
// returns the current line number
|
||
|
|
const int GetLineNum( void );
|
||
|
|
// print an error message
|
||
|
|
void Error( const char *str, ... );
|
||
|
|
// print a warning message
|
||
|
|
void Warning( const char *str, ... );
|
||
|
|
// returns true if Error() was called with LEXFL_NOFATALERRORS or LEXFL_NOERRORS set
|
||
|
|
bool HadError( void ) const;
|
||
|
|
|
||
|
|
// write a binary representation of a token
|
||
|
|
void WriteBinaryToken(idToken *tok);
|
||
|
|
|
||
|
|
static void SetBaseFolder(char const * const);
|
||
|
|
|
||
|
|
// RAVEN BEGIN
|
||
|
|
// dluetscher: added method to parse a structure array that is made up of numerics (floats, ints), and stores them in the given storage
|
||
|
|
void ParseNumericStructArray( int numStructElements, int tokenSubTypeStructElements[], int arrayCount, byte *arrayStorage );
|
||
|
|
// RAVEN END
|
||
|
|
|
||
|
|
// suffix that should be appended to the normal file extension to signify that the file is binary
|
||
|
|
static idStr const sCompiledFileSuffix;
|
||
|
|
|
||
|
|
protected:
|
||
|
|
static char baseFolder[256];
|
||
|
|
|
||
|
|
private:
|
||
|
|
bool OpenFile(char const *filename, bool OSPath);
|
||
|
|
|
||
|
|
#ifdef LEXER_READ_AHEAD
|
||
|
|
LexerIOWrapper mLexerIOWrapper;
|
||
|
|
#else
|
||
|
|
idFile *mFile;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
unsigned int offset;
|
||
|
|
idToken unreadToken;
|
||
|
|
unsigned int unreadSize;
|
||
|
|
bool tokenAvailable;
|
||
|
|
idLexer *mDelegate;
|
||
|
|
int mFlags;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
ID_INLINE const char *idLexer::GetFileName( void ) {
|
||
|
|
return idLexer::filename;
|
||
|
|
}
|
||
|
|
|
||
|
|
ID_INLINE const int idLexer::GetFileOffset( void ) {
|
||
|
|
return idLexer::script_p - idLexer::buffer;
|
||
|
|
}
|
||
|
|
|
||
|
|
ID_INLINE const unsigned int idLexer::GetFileTime( void ) {
|
||
|
|
return idLexer::fileTime;
|
||
|
|
}
|
||
|
|
|
||
|
|
ID_INLINE const int idLexer::GetLineNum( void ) {
|
||
|
|
return idLexer::line;
|
||
|
|
}
|
||
|
|
|
||
|
|
ID_INLINE void idLexer::SetFlags( int flags ) {
|
||
|
|
idLexer::flags = flags;
|
||
|
|
}
|
||
|
|
|
||
|
|
ID_INLINE int idLexer::GetFlags( void ) {
|
||
|
|
return idLexer::flags;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* !__LEXER_H__ */
|
||
|
|
|