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1.1 ! root 1: %Start A str def thru sh ! 2: ! 3: %{ ! 4: #undef input ! 5: #undef unput ! 6: #include <stdio.h> ! 7: #include <ctype.h> ! 8: #include "grap.h" ! 9: #include "y.tab.h" ! 10: ! 11: extern struct symtab symtab[]; ! 12: ! 13: #define CADD cbuf[clen++]=yytext[0]; if(clen>=CBUFLEN-1) {yyerror("string too long", cbuf); BEGIN A;} ! 14: #define CBUFLEN 1500 ! 15: char cbuf[CBUFLEN]; ! 16: int clen, cflag; ! 17: int c, delim; ! 18: %} ! 19: ! 20: A [a-zA-Z_] ! 21: B [a-zA-Z0-9_] ! 22: D [0-9] ! 23: WS [ \t] ! 24: ! 25: %% ! 26: if (yybgin-yysvec-1 == 0) { /* witchcraft */ ! 27: BEGIN A; ! 28: } ! 29: ! 30: <A>{WS} ; ! 31: <A>"\\"\n ; ! 32: <A>\n return(ST); ! 33: <A>";" return(ST); ! 34: ! 35: <A>line return(yylval.i = LINE); ! 36: <A>arrow { yylval.i = ARROW; return(LINE); } ! 37: <A>circle return(yylval.i = CIRCLE); ! 38: <A>frame return(FRAME); ! 39: <A>tick(s)? return(TICKS); ! 40: <A>grid(line)?(s)? return(GRID); ! 41: <A>coord(s)? return(COORD); ! 42: <A>log return(LOG); ! 43: <A>exp return(EXP); ! 44: <A>sin return(SIN); ! 45: <A>cos return(COS); ! 46: <A>atan2 return(ATAN2); ! 47: <A>sqrt return(SQRT); ! 48: <A>rand return(RAND); ! 49: <A>max return(MAX); ! 50: <A>min return(MIN); ! 51: <A>int return(INT); ! 52: <A>print return(PRINT); ! 53: <A>pic{WS}.* { yylval.p = tostring(yytext+3); return(PIC); } ! 54: <A>graph{WS}.* { yylval.p = tostring(yytext+5); return(GRAPH); } ! 55: ! 56: <A>for return(FOR); ! 57: <A>^Endfor\n { endfor(); } ! 58: <A>do { yylval.p = delimstr("loop body"); BEGIN A; return(DOSTR); } ! 59: ! 60: <A>copy|include { return(COPY); } ! 61: <A>thru|through { BEGIN thru; return(THRU); } ! 62: <thru>{WS}+ ; ! 63: <thru>{A}{B}*|. { yylval.op = copythru(yytext); BEGIN A; return(DEFNAME); } ! 64: <A>until return(UNTIL); ! 65: ! 66: <A>if return(IF); ! 67: <A>then { yylval.p = delimstr("then part"); BEGIN A; return(THEN); } ! 68: <A>else { yylval.p = delimstr("else part"); BEGIN A; return(ELSE); } ! 69: ! 70: <A>next return(NEXT); ! 71: <A>draw return(yylval.i = DRAW); ! 72: <A>new return(yylval.i = NEW); ! 73: <A>plot return(yylval.i = PLOT); ! 74: <A>label(s)? return(LABEL); ! 75: <A>x return(X); ! 76: <A>y return(Y); ! 77: ! 78: <A>top { yylval.i = TOP; return SIDE; } ! 79: <A>bot(tom)? { yylval.i = BOT; return SIDE; } ! 80: <A>left { yylval.i = LEFT; return SIDE; } ! 81: <A>right { yylval.i = RIGHT; return SIDE; } ! 82: <A>up return(yylval.i = UP); ! 83: <A>down return(yylval.i = DOWN); ! 84: <A>across return(yylval.i = ACROSS); ! 85: <A>height|ht return(yylval.i = HEIGHT); ! 86: <A>wid(th)? return(yylval.i = WIDTH); ! 87: <A>rad(ius)? return(yylval.i = RADIUS); ! 88: <A>invis return(yylval.i = INVIS); ! 89: <A>dot(ted) return(yylval.i = DOT); ! 90: <A>dash(ed) return(yylval.i = DASH); ! 91: <A>solid return(yylval.i = SOLID); ! 92: ! 93: <A>ljust { yylval.i = LJUST; return JUST; } ! 94: <A>rjust { yylval.i = RJUST; return JUST; } ! 95: <A>above { yylval.i = ABOVE; return JUST; } ! 96: <A>below { yylval.i = BELOW; return JUST; } ! 97: <A>size return(yylval.i = SIZE); ! 98: ! 99: <A>from return(yylval.i = FROM); ! 100: <A>to return(yylval.i = TO); ! 101: <A>by|step return(yylval.i = BY); ! 102: <A>at return(yylval.i = AT); ! 103: <A>with return(yylval.i = WITH); ! 104: <A>in return(yylval.i = IN); ! 105: <A>out return(yylval.i = OUT); ! 106: <A>off return(yylval.i = OFF); ! 107: ! 108: <A>sh{WS}+ { BEGIN sh; ! 109: if ((delim = input()) == '{') delim = '}'; /* no nested {} */ ! 110: shell_init(); } ! 111: <sh>{A}{B}* { ! 112: int c; ! 113: Obj *p; ! 114: if (yytext[0] == delim) { ! 115: shell_exec(); ! 116: BEGIN A; ! 117: } else { ! 118: p = lookup(yytext, 0); ! 119: if (p != NULL && p->type == DEFNAME) { ! 120: c = input(); ! 121: unput(c); ! 122: if (c == '(') ! 123: dodef(p); ! 124: else ! 125: pbstr(p->val); ! 126: } else ! 127: shell_text(yytext); ! 128: } ! 129: } ! 130: <sh>.|\n { if (yytext[0] == delim) { ! 131: shell_exec(); ! 132: BEGIN A; ! 133: } else ! 134: shell_text(yytext); ! 135: } ! 136: ! 137: <A>define{WS}+ { BEGIN def; } ! 138: <def>{A}{B}* { definition(yytext); BEGIN A; } ! 139: ! 140: <A>({D}+("."?){D}*|"."{D}+)((e|E)("+"|-)?{D}+)?i? { ! 141: yylval.f = atof(yytext); return(NUMBER); } ! 142: ! 143: <A>^"."[^{D}].* { if (yytext[1] == 'G' && yytext[2] == '2') { ! 144: yylval.i = yytext[2]; ! 145: return(EOF); ! 146: } else { ! 147: yylval.p = tostring(yytext); ! 148: return(PIC); ! 149: } ! 150: } ! 151: ! 152: <A>{A}{B}* { ! 153: int c; ! 154: Obj *p; ! 155: p = lookup(yytext, 1); ! 156: if (p->type == DEFNAME) { ! 157: c = input(); ! 158: unput(c); ! 159: if (c == '(') /* it's name(...) */ ! 160: dodef(p); ! 161: else /* no argument list */ ! 162: pbstr(p->val); ! 163: } else { ! 164: yylval.op = p; ! 165: return p->type; /* NAME or VARNAME */ ! 166: } ! 167: } ! 168: ! 169: <A>"==" return(EQ); ! 170: <A>">=" return(GE); ! 171: <A>"<=" return(LE); ! 172: <A>"!=" return(NE); ! 173: <A>">" return(GT); ! 174: <A>"<" return(LT); ! 175: <A>"&&" return(AND); ! 176: <A>"||" return(OR); ! 177: <A>"!" return(NOT); ! 178: ! 179: <A>\" { BEGIN str; clen = 0; } ! 180: ! 181: <A>#.* ; ! 182: ! 183: <A>. { yylval.i = yytext[0]; return(yytext[0]); } ! 184: ! 185: <str>\" { BEGIN A; cbuf[clen] = 0; ! 186: yylval.p = tostring(cbuf); return(STRING); } ! 187: <str>\n { yyerror("newline in string"); BEGIN A; return(ST); } ! 188: <str>"\\\"" { cbuf[clen++] = '\\'; cbuf[clen++] = '"'; } ! 189: <str>"\\\\" { cbuf[clen++] = '\\'; cbuf[clen++] = '\\'; } ! 190: <str>. { CADD; } ! 191: ! 192: %%
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