188 lines
2.8 KiB
Plaintext
188 lines
2.8 KiB
Plaintext
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%{
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#include <stdio.h>
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#include <iostream>
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using namespace std;
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extern "C" {
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int yylex(void);
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}
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extern FILE * yyin;
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void yyerror(const char * str)
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{
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fprintf(stderr, "error: %s\n", str);
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}
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int yywrap()
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{
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return 1;
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}
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#define YYSTYPE void *
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%}
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%token PLUS;
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%token MINUS;
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%token STAR;
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%token DIVIDE;
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%token MOD;
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%token SEMICOLON;
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%token COLON;
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%token QUESTION;
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%token DOLLAR;
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%token DOT;
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%token DQUOTE;
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%token SQUOTE;
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%token COMMA;
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%token LCURLY;
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%token RCURLY;
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%token LBRACKET;
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%token RBRACKET;
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%token LPAREN;
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%token RPAREN;
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%token LESS;
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%token GREATER;
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%token DEC_NUMBER;
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%token REAL_NUMBER;
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%token BOX;
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%token CAMERA;
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%token COLOR;
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%token HEIGHT;
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%token INTERSECT;
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%token LOOKAT;
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%token MATERIAL;
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%token MULTISAMPLE;
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%token OPTIONS;
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%token PLANE;
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%token POSITION;
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%token RADIUS;
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%token REFLECTANCE;
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%token SCENE;
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%token SHININESS;
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%token SIZE;
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%token SPHERE;
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%token SUBTRACT;
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%token UNION;
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%token UP;
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%token VFOV;
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%token WIDTH;
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%%
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scene: /* empty */
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| scene_spec { printf("Saw a scene\n"); }
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;
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boolean_items: shape shape boolean_items_more
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;
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boolean_items_more: /* empty */
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| material boolean_items_more
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;
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box: BOX LCURLY box_items RCURLY
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;
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box_items: shape_items
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| SIZE vector box_items
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;
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camera: CAMERA LCURLY camera_items RCURLY
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;
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camera_items: /* empty */
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| camera_item camera_items
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;
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camera_item: POSITION vector
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| LOOKAT vector
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| UP vector
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| VFOV vector
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;
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intersect: INTERSECT LCURLY boolean_items RCURLY
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;
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material: MATERIAL LCURLY material_items RCURLY
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;
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material_items: /* empty */
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| material_item material_items
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;
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material_item: COLOR vector
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| REFLECTANCE number
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| SHININESS number
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;
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number: DEC_NUMBER
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| REAL_NUMBER
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;
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plane: PLANE LCURLY plane_items RCURLY
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;
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plane_items: shape_items
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| POSITION vector COMMA number plane_items
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;
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scene_spec: SCENE LCURLY scene_items RCURLY
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;
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scene_items: /* empty */
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| scene_item scene_items
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;
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scene_item: camera
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| shape
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;
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shape: plane
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| sphere
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| box
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| union
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| intersect
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| subtract
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;
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shape_items: /* empty */
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| material
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;
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sphere: SPHERE LCURLY sphere_items RCURLY
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;
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sphere_items: shape_items
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| RADIUS number sphere_items
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;
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subtract: SUBTRACT LCURLY boolean_items RCURLY
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;
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union: UNION LCURLY boolean_items RCURLY
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;
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vector: LESS number COMMA number COMMA number GREATER
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;
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%%
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int parse(const char * fileName)
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{
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yyin = fopen(fileName, "r");
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if (yyin == NULL)
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{
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cerr << "Failed to open file '" << fileName << "'" << endl;
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return -1;
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}
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yyparse();
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}
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