%{ #include #include #include #include #include "grap.h" //#define RAND_MAX 32767 /* if your rand() returns bigger, change this too */ extern int yylex(void); extern int yyparse(void); %} %token FRAME TICKS GRID LABEL COORD %token LINE ARROW CIRCLE DRAW NEW PLOT NEXT %token

PIC %token COPY THRU UNTIL %token FOR FROM TO BY AT WITH %token IF %token

GRAPH THEN ELSE DOSTR %token DOT DASH INVIS SOLID %token TEXT JUST SIZE %token LOG EXP SIN COS ATAN2 SQRT RAND MAX MIN INT PRINT SPRINTF %token X Y SIDE IN OUT OFF UP DOWN ACROSS %token HEIGHT WIDTH RADIUS %token NUMBER %token NAME VARNAME DEFNAME %token

STRING %token ST '(' ')' ',' %right '=' %left OR %left AND %nonassoc GT LT LE GE EQ NE %left '+' '-' %left '*' '/' '%' %right UMINUS NOT %right '^' %type expr optexpr if_expr number assign %type optop %type

optstring if %type optname iterator name %type point %type side optside numlist comma linetype drawtype %type linedesc optdesc stringlist string stringattr sattrlist exprlist %type frameitem framelist coordlog %type string_expr %% top: graphseq { if (codegen && !synerr) graph((char *) 0); } | /* empty */ { codegen = 0; } | error { codegen = 0; ERROR "syntax error" WARNING; } ; graphseq: statlist | graph statlist | graphseq graph statlist ; graph: GRAPH { graph($1); endstat(); } ; statlist: ST | stat ST { endstat(); } | statlist stat ST { endstat(); } ; stat: FRAME framelist { codegen = 1; } | ticks { codegen = 1; } | grid { codegen = 1; } | label { codegen = 1; } | coord | plot { codegen = 1; } | line { codegen = 1; } | circle { codegen = 1; } | draw | next { codegen = 1; } | PIC { codegen = 1; pic($1); } | for | if | copy | numlist { codegen = 1; numlist(); } | assign | PRINT expr { fprintf(stderr, "\t%g\n", $2); } | PRINT string { fprintf(stderr, "\t%s\n", $2->sval); freeattr($2); } | /* empty */ ; numlist: number { savenum(0, $1); $$ = 1; } | numlist number { savenum($1, $2); $$ = $1+1; } | numlist comma number { savenum($1, $3); $$ = $1+1; } ; number: NUMBER | '-' NUMBER %prec UMINUS { $$ = -$2; } | '+' NUMBER %prec UMINUS { $$ = $2; } ; label: LABEL optside stringlist lablist { label($2, $3); } ; lablist: labattr | lablist labattr | /* empty */ ; labattr: UP expr { labelmove($1, $2); } | DOWN expr { labelmove($1, $2); } | SIDE expr { labelmove($1, $2); /* LEFT or RIGHT only */ } | WIDTH expr { labelwid($2); } ; framelist: framelist frameitem | /* empty */ { $$ = 0; } ; frameitem: HEIGHT expr { frameht($2); } | WIDTH expr { framewid($2); } | side linedesc { frameside($1, $2); } | linedesc { frameside(0, $1); } ; side: SIDE ; optside: side | /* empty */ { $$ = 0; } ; linedesc: linetype optexpr { $$ = makeattr($1, $2, (char *) 0, 0, 0); } ; linetype: DOT | DASH | SOLID | INVIS ; optdesc: linedesc | /* empty */ { $$ = makeattr(0, 0.0, (char *) 0, 0, 0); } ; ticks: TICKS tickdesc { ticks(); } ; tickdesc: tickattr | tickdesc tickattr ; tickattr: side { tickside($1); } | IN expr { tickdir(IN, $2, 1); } | OUT expr { tickdir(OUT, $2, 1); } | IN { tickdir(IN, 0.0, 0); } | OUT { tickdir(OUT, 0.0, 0); } | AT optname ticklist { setlist(); ticklist($2, AT); } | iterator { setlist(); ticklist($1, AT); } | side OFF { tickoff($1); } | OFF { tickoff(LEFT|RIGHT|TOP|BOT); } | labattr ; ticklist: tickpoint | ticklist comma tickpoint ; tickpoint: expr { savetick($1, (char *) 0); } | expr string { savetick($1, $2->sval); } ; iterator: FROM optname expr TO optname expr BY optop expr optstring { iterator($3, $6, $8, $9, $10); $$ = $2; } | FROM optname expr TO optname expr optstring { iterator($3, $6, '+', 1.0, $7); $$ = $2; } ; optop: '+' { $$ = '+'; } | '-' { $$ = '-'; } | '*' { $$ = '*'; } | '/' { $$ = '/'; } | /* empty */ { $$ = ' '; } ; optstring: string { $$ = $1->sval; } | /* empty */ { $$ = (char *) 0; } ; grid: GRID griddesc { ticks(); } ; griddesc: gridattr | griddesc gridattr ; gridattr: side { tickside($1); } | X { tickside(BOT); } | Y { tickside(LEFT); } | linedesc { griddesc($1); } | AT optname ticklist { setlist(); gridlist($2); } | iterator { setlist(); gridlist($1); } | TICKS OFF { gridtickoff(); } | OFF { gridtickoff(); } | labattr ; line: LINE FROM point TO point optdesc { line($1, $3, $5, $6); } | LINE optdesc FROM point TO point { line($1, $4, $6, $2); } ; circle: CIRCLE RADIUS expr AT point { circle($3, $5); } | CIRCLE AT point RADIUS expr { circle($5, $3); } | CIRCLE AT point { circle(0.0, $3); } ; stringlist: string | stringlist string { $$ = addattr($1, $2); } ; string: STRING sattrlist { $$ = makesattr($1); } | SPRINTF '(' STRING ')' sattrlist { $$ = makesattr(sprntf($3, (Attr*) 0)); } | SPRINTF '(' STRING ',' exprlist ')' sattrlist { $$ = makesattr(sprntf($3, $5)); } ; exprlist: expr { $$ = makefattr(NUMBER, $1); } | exprlist ',' expr { $$ = addattr($1, makefattr(NUMBER, $3)); } ; sattrlist: stringattr | sattrlist stringattr | /* empty */ { $$ = (Attr *) 0; } ; stringattr: JUST { setjust($1); } | SIZE optop expr { setsize($2, $3); } ; coord: COORD optname coordlist { coord($2); } | COORD optname { resetcoord($2); } ; coordlist: coorditem | coordlist coorditem ; coorditem: coordlog { coordlog($1); } | X point { coord_x($2); } | Y point { coord_y($2); } | X optname expr TO expr { coord_x(makepoint($2, $3, $5)); } | Y optname expr TO expr { coord_y(makepoint($2, $3, $5)); } | X FROM optname expr TO expr { coord_x(makepoint($3, $4, $6)); } | Y FROM optname expr TO expr { coord_y(makepoint($3, $4, $6)); } ; coordlog: LOG X { $$ = XFLAG; } | LOG Y { $$ = YFLAG; } | LOG X LOG Y { $$ = XFLAG|YFLAG; } | LOG Y LOG X { $$ = XFLAG|YFLAG; } | LOG LOG { $$ = XFLAG|YFLAG; } ; plot: stringlist AT point { plot($1, $3); } | PLOT stringlist AT point { plot($2, $4); } | PLOT expr optstring AT point { plotnum($2, $3, $5); } ; draw: drawtype optname linedesc { drawdesc($1, $2, $3, (char *) 0); } | drawtype optname optdesc string { drawdesc($1, $2, $3, $4->sval); } | drawtype optname string optdesc { drawdesc($1, $2, $4, $3->sval); } ; drawtype: DRAW | NEW ; next: NEXT optname AT point optdesc { next($2, $4, $5); } copy: COPY copylist { copy(); } ; copylist: copyattr | copylist copyattr ; copyattr: string { copyfile($1->sval); } | THRU DEFNAME { copydef($2); } | UNTIL string { copyuntil($2->sval); } ; for: FOR name FROM expr TO expr BY optop expr DOSTR { forloop($2, $4, $6, $8, $9, $10); } | FOR name FROM expr TO expr DOSTR { forloop($2, $4, $6, '+', 1.0, $7); } | FOR name '=' expr TO expr BY optop expr DOSTR { forloop($2, $4, $6, $8, $9, $10); } | FOR name '=' expr TO expr DOSTR { forloop($2, $4, $6, '+', 1.0, $7); } ; if: IF if_expr THEN ELSE { $$ = ifstat($2, $3, $4); } | IF if_expr THEN { $$ = ifstat($2, $3, (char *) 0); } ; if_expr: expr | string_expr | if_expr AND string_expr { $$ = $1 && $3; } | if_expr OR string_expr { $$ = $1 || $3; } ; string_expr: STRING EQ STRING { $$ = strcmp($1,$3) == 0; free($1); free($3); } | STRING NE STRING { $$ = strcmp($1,$3) != 0; free($1); free($3); } ; point: optname expr comma expr { $$ = makepoint($1, $2, $4); } | optname '(' expr comma expr ')' { $$ = makepoint($1, $3, $5); } ; comma: ',' { $$ = ','; } ; optname: NAME { $$ = $1; } | /* empty */ { $$ = lookup(curr_coord, 1); } ; expr: NUMBER | assign | '(' string_expr ')' { $$ = $2; } | VARNAME { $$ = getvar($1); } | expr '+' expr { $$ = $1 + $3; } | expr '-' expr { $$ = $1 - $3; } | expr '*' expr { $$ = $1 * $3; } | expr '/' expr { if ($3 == 0.0) { ERROR "division by 0" WARNING; $3 = 1; } $$ = $1 / $3; } | expr '%' expr { if ((long)$3 == 0) { ERROR "mod division by 0" WARNING; $3 = 1; } $$ = (long)$1 % (long)$3; } | '-' expr %prec UMINUS { $$ = -$2; } | '+' expr %prec UMINUS { $$ = $2; } | '(' expr ')' { $$ = $2; } | LOG '(' expr ')' { $$ = Log10($3); } | EXP '(' expr ')' { $$ = Exp($3 * log(10.0)); } | expr '^' expr { $$ = pow($1, $3); } | SIN '(' expr ')' { $$ = sin($3); } | COS '(' expr ')' { $$ = cos($3); } | ATAN2 '(' expr ',' expr ')' { $$ = atan2($3, $5); } | SQRT '(' expr ')' { $$ = Sqrt($3); } | RAND '(' ')' { $$ = (double)rand() / (double)RAND_MAX; } | MAX '(' expr ',' expr ')' { $$ = $3 >= $5 ? $3 : $5; } | MIN '(' expr ',' expr ')' { $$ = $3 <= $5 ? $3 : $5; } | INT '(' expr ')' { $$ = (long) $3; } | expr GT expr { $$ = $1 > $3; } | expr LT expr { $$ = $1 < $3; } | expr LE expr { $$ = $1 <= $3; } | expr GE expr { $$ = $1 >= $3; } | expr EQ expr { $$ = $1 == $3; } | expr NE expr { $$ = $1 != $3; } | expr AND expr { $$ = $1 && $3; } | expr OR expr { $$ = $1 || $3; } | NOT expr { $$ = !($2); } ; assign: name '=' expr { $$ = setvar($1, $3); } ; name: NAME | VARNAME ; optexpr: expr | /* empty */ { $$ = 0.0; } ;