193 lines
7.1 KiB
C++
193 lines
7.1 KiB
C++
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/**
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* projectM -- Milkdrop-esque visualisation SDK
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* Copyright (C)2003-2007 projectM Team
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* See 'LICENSE.txt' included within this release
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*
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*/
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/**
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* $Id$
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*
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* MilkdropPreset parser
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*
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* $Log$
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*/
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#ifndef _PARSER_H
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#define _PARSER_H
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//#define PARSE_DEBUG 2
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#define PARSE_DEBUG 0
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#include <stdio.h>
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#include "Expr.hpp"
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#include "PerFrameEqn.hpp"
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#include "InitCond.hpp"
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#include "MilkdropPreset.hpp"
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/* Strings that prefix (and denote the type of) equations */
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#define PER_FRAME_STRING "per_frame_"
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#define PER_FRAME_STRING_LENGTH 10
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#define PER_PIXEL_STRING "per_pixel_"
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#define PER_PIXEL_STRING_LENGTH 10
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#define PER_FRAME_INIT_STRING "per_frame_init_"
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#define PER_FRAME_INIT_STRING_LENGTH 15
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#define WAVECODE_STRING "wavecode_"
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#define WAVECODE_STRING_LENGTH 9
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#define WAVE_STRING "wave_"
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#define WAVE_STRING_LENGTH 5
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#define PER_POINT_STRING "per_point"
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#define PER_POINT_STRING_LENGTH 9
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#define PER_FRAME_STRING_NO_UNDERSCORE "per_frame"
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#define PER_FRAME_STRING_NO_UNDERSCORE_LENGTH 9
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#define SHAPECODE_STRING "shapecode_"
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#define SHAPECODE_STRING_LENGTH 10
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#define WARP_STRING "warp_"
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#define WARP_STRING_LENGTH 5
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#define COMPOSITE_STRING "comp_"
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#define COMPOSITE_STRING_LENGTH 5
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#define SHAPE_STRING "shape_"
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#define SHAPE_STRING_LENGTH 6
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#define SHAPE_INIT_STRING "init"
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#define SHAPE_INIT_STRING_LENGTH 4
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#define WAVE_INIT_STRING "init"
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#define WAVE_INIT_STRING_LENGTH 4
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#include <set>
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typedef enum {
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UNSET_LINE_MODE,
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PER_FRAME_LINE_MODE,
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PER_PIXEL_LINE_MODE,
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PER_FRAME_INIT_LINE_MODE,
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INIT_COND_LINE_MODE,
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CUSTOM_WAVE_PER_POINT_LINE_MODE,
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CUSTOM_WAVE_PER_FRAME_LINE_MODE,
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CUSTOM_WAVE_WAVECODE_LINE_MODE,
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CUSTOM_SHAPE_SHAPECODE_LINE_MODE,
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CUSTOM_SHAPE_PER_FRAME_LINE_MODE,
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CUSTOM_SHAPE_PER_FRAME_INIT_LINE_MODE,
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CUSTOM_WAVE_PER_FRAME_INIT_LINE_MODE
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} line_mode_t;
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/** Token enumeration type */
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typedef enum {
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tEOL, /* end of a line, usually a '/n' or '/r' */
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tEOF, /* end of file */
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tLPr, /* ( */
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tRPr, /* ) */
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tLBr, /* [ */
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tRBr, /* ] */
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tEq, /* = */
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tPlus, /* + */
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tMinus, /* - */
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tMult, /* * */
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tMod, /* % */
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tDiv, /* / */
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tOr, /* | */
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tAnd, /* & */
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tComma, /* , */
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tPositive, /* + as a prefix operator */
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tNegative, /* - as a prefix operator */
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tSemiColon, /* ; */
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tStringTooLong, /* special token to indicate an invalid string length */
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tStringBufferFilled /* the string buffer for this line is maxed out */
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} token_t;
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class CustomShape;
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class CustomWave;
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class GenExpr;
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class InfixOp;
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class PerFrameEqn;
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class MilkdropPreset;
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class TreeExpr;
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class Parser {
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public:
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static std::string lastLinePrefix;
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static line_mode_t line_mode;
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static CustomWave *current_wave;
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static CustomShape *current_shape;
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static int string_line_buffer_index;
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static char string_line_buffer[STRING_LINE_SIZE];
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static unsigned int line_count;
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static int per_frame_eqn_count;
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static int per_frame_init_eqn_count;
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static int last_custom_wave_id;
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static int last_custom_shape_id;
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static char last_eqn_type[MAX_TOKEN_SIZE];
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static int last_token_size;
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static bool tokenWrapAroundEnabled;
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static PerFrameEqn *parse_per_frame_eqn( std::istream & fs, int index,
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MilkdropPreset * preset);
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static int parse_per_pixel_eqn( std::istream & fs, MilkdropPreset * preset,
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char * init_string);
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static InitCond *parse_init_cond( std::istream & fs, char * name, MilkdropPreset * preset );
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static int parse_preset_name( std::istream & fs, char * name );
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static int parse_top_comment( std::istream & fs );
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static int parse_line( std::istream & fs, MilkdropPreset * preset );
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static int get_string_prefix_len(char * string);
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static TreeExpr * insert_gen_expr(GenExpr * gen_expr, TreeExpr ** root);
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static TreeExpr * insert_infix_op(InfixOp * infix_op, TreeExpr ** root);
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static token_t parseToken(std::istream & fs, char * string);
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static GenExpr ** parse_prefix_args(std::istream & fs, int num_args, MilkdropPreset * preset);
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static GenExpr * parse_infix_op(std::istream & fs, token_t token, TreeExpr * tree_expr, MilkdropPreset * preset);
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static GenExpr * parse_sign_arg(std::istream & fs);
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static int parse_float(std::istream & fs, float * float_ptr);
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static int parse_int(std::istream & fs, int * int_ptr);
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static int insert_gen_rec(GenExpr * gen_expr, TreeExpr * root);
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static int insert_infix_rec(InfixOp * infix_op, TreeExpr * root);
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static GenExpr * parse_gen_expr(std::istream & fs, TreeExpr * tree_expr, MilkdropPreset * preset);
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static PerFrameEqn * parse_implicit_per_frame_eqn(std::istream & fs, char * param_string, int index, MilkdropPreset * preset);
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static InitCond * parse_per_frame_init_eqn(std::istream & fs, MilkdropPreset * preset, std::map<std::string,Param*> * database);
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static int parse_wavecode_prefix(char * token, int * id, char ** var_string);
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static int parse_wavecode(char * token, std::istream & fs, MilkdropPreset * preset);
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static int parse_wave_prefix(char * token, int * id, char ** eqn_string);
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static int parse_wave_helper(std::istream & fs, MilkdropPreset * preset, int id, char * eqn_type, char * init_string);
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static int parse_shapecode(char * eqn_string, std::istream & fs, MilkdropPreset * preset);
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static int parse_shapecode_prefix(char * token, int * id, char ** var_string);
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static void parse_string_block(std::istream & fs, std::string * out_string);
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static bool scanForComment(std::istream & fs);
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static int parse_wave(char * eqn_string, std::istream & fs, MilkdropPreset * preset);
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static int parse_shape(char * eqn_string, std::istream & fs, MilkdropPreset * preset);
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static int parse_shape_prefix(char * token, int * id, char ** eqn_string);
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static void readStringUntil(std::istream & fs, std::string * out_buffer, bool wrapAround = true, const std::set<char> & skipList = std::set<char>()) ;
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static int string_to_float(char * string, float * float_ptr);
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static int parse_shape_per_frame_init_eqn(std::istream & fs, CustomShape * custom_shape, MilkdropPreset * preset);
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static int parse_shape_per_frame_eqn(std::istream & fs, CustomShape * custom_shape, MilkdropPreset * preset);
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static int parse_wave_per_frame_eqn(std::istream & fs, CustomWave * custom_wave, MilkdropPreset * preset);
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static bool wrapsToNextLine(const std::string & str);
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};
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#endif /** !_PARSER_H */
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