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Up to [Research Unix] / researchv10no / cmd / grap / non-ansi|
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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]; \
14: if (clen >= CBUFLEN-1) { \
15: ERROR "string too long", cbuf WARNING; BEGIN A; }
16: #define CBUFLEN 1500
17: char cbuf[CBUFLEN];
18: int clen, cflag;
19: int c, delim, shcnt;
20: %}
21:
22: A [a-zA-Z_]
23: B [a-zA-Z0-9_]
24: D [0-9]
25: WS [ \t]
26:
27: %%
28: if (yybgin-yysvec-1 == 0) { /* witchcraft */
29: BEGIN A;
30: }
31:
32: <A>{WS} ;
33: <A>"\\"\n ;
34: <A>\n return(ST);
35: <A>";" return(ST);
36:
37: <A>line return(yylval.i = LINE);
38: <A>arrow { yylval.i = ARROW; return(LINE); }
39: <A>circle return(yylval.i = CIRCLE);
40: <A>frame return(FRAME);
41: <A>tick(s)? return(TICKS);
42: <A>grid(line)?(s)? return(GRID);
43: <A>coord(s)? return(COORD);
44: <A>log return(LOG);
45: <A>exp return(EXP);
46: <A>sin return(SIN);
47: <A>cos return(COS);
48: <A>atan2 return(ATAN2);
49: <A>sqrt return(SQRT);
50: <A>rand return(RAND);
51: <A>max return(MAX);
52: <A>min return(MIN);
53: <A>int return(INT);
54: <A>print return(PRINT);
55: <A>sprintf return(SPRINTF);
56: <A>pic{WS}.* { yylval.p = tostring(yytext+3); return(PIC); }
57: <A>graph{WS}.* { yylval.p = tostring(yytext+5); return(GRAPH); }
58:
59: <A>for return(FOR);
60: <A>^Endfor\n { endfor(); }
61: <A>do { yylval.p = delimstr("loop body"); BEGIN A; return(DOSTR); }
62:
63: <A>copy|include { return(COPY); }
64: <A>thru|through { BEGIN thru; return(THRU); }
65: <thru>{WS}+ ;
66: <thru>{A}{B}*|. { yylval.op = copythru(yytext); BEGIN A; return(DEFNAME); }
67: <A>until return(UNTIL);
68:
69: <A>if return(IF);
70: <A>then { yylval.p = delimstr("then part"); BEGIN A; return(THEN); }
71: <A>else { yylval.p = delimstr("else part"); BEGIN A; return(ELSE); }
72:
73: <A>next return(NEXT);
74: <A>draw return(yylval.i = DRAW);
75: <A>new return(yylval.i = NEW);
76: <A>plot return(yylval.i = PLOT);
77: <A>label(s)? return(LABEL);
78: <A>x return(X);
79: <A>y return(Y);
80:
81: <A>top { yylval.i = TOP; return SIDE; }
82: <A>bot(tom)? { yylval.i = BOT; return SIDE; }
83: <A>left { yylval.i = LEFT; return SIDE; }
84: <A>right { yylval.i = RIGHT; return SIDE; }
85: <A>up return(yylval.i = UP);
86: <A>down return(yylval.i = DOWN);
87: <A>across return(yylval.i = ACROSS);
88: <A>height|ht return(yylval.i = HEIGHT);
89: <A>wid(th)? return(yylval.i = WIDTH);
90: <A>rad(ius)? return(yylval.i = RADIUS);
91: <A>invis return(yylval.i = INVIS);
92: <A>dot(ted) return(yylval.i = DOT);
93: <A>dash(ed) return(yylval.i = DASH);
94: <A>solid return(yylval.i = SOLID);
95:
96: <A>ljust { yylval.i = LJUST; return JUST; }
97: <A>rjust { yylval.i = RJUST; return JUST; }
98: <A>above { yylval.i = ABOVE; return JUST; }
99: <A>below { yylval.i = BELOW; return JUST; }
100: <A>size return(yylval.i = SIZE);
101:
102: <A>from return(yylval.i = FROM);
103: <A>to return(yylval.i = TO);
104: <A>by|step return(yylval.i = BY);
105: <A>at return(yylval.i = AT);
106: <A>with return(yylval.i = WITH);
107: <A>in return(yylval.i = IN);
108: <A>out return(yylval.i = OUT);
109: <A>off return(yylval.i = OFF);
110:
111: <A>sh{WS}+ { BEGIN sh;
112: if ((delim = input()) == '{') {
113: shcnt = 1;
114: delim = '}';
115: }
116: shell_init();
117: }
118: <sh>{A}{B}* {
119: int c;
120: Obj *p;
121: if (yytext[0] == delim) {
122: shell_exec();
123: BEGIN A;
124: } else {
125: p = lookup(yytext, 0);
126: if (p != NULL && p->type == DEFNAME) {
127: c = input();
128: unput(c);
129: if (c == '(')
130: dodef(p);
131: else
132: pbstr(p->val);
133: } else
134: shell_text(yytext);
135: }
136: }
137: <sh>"{" { shcnt++; shell_text(yytext); }
138: <sh>"}" { if (delim != '}' || --shcnt > 0)
139: shell_text(yytext);
140: else {
141: shell_exec();
142: BEGIN A;
143: }
144: }
145: <sh>.|\n { if (yytext[0] == delim) {
146: shell_exec();
147: BEGIN A;
148: } else
149: shell_text(yytext);
150: }
151:
152: <A>define{WS}+ { BEGIN def; }
153: <def>{A}{B}* { definition(yytext); BEGIN A; }
154:
155: <A>({D}+("."?){D}*|"."{D}+)((e|E)("+"|-)?{D}+)?i? {
156: yylval.f = atof(yytext); return(NUMBER); }
157:
158: <A>^"."[^0-9].* { if (yytext[1] == 'G' && yytext[2] == '2') {
159: yylval.i = yytext[2];
160: return(EOF);
161: } else {
162: yylval.p = tostring(yytext);
163: return(PIC);
164: }
165: }
166:
167: <A>{A}{B}* {
168: int c;
169: Obj *p;
170: p = lookup(yytext, 1);
171: if (p->type == DEFNAME) {
172: c = input();
173: unput(c);
174: if (c == '(') /* it's name(...) */
175: dodef(p);
176: else /* no argument list */
177: pbstr(p->val);
178: } else {
179: yylval.op = p;
180: return p->type; /* NAME or VARNAME */
181: }
182: }
183:
184: <A>"==" return(EQ);
185: <A>">=" return(GE);
186: <A>"<=" return(LE);
187: <A>"!=" return(NE);
188: <A>">" return(GT);
189: <A>"<" return(LT);
190: <A>"&&" return(AND);
191: <A>"||" return(OR);
192: <A>"!" return(NOT);
193:
194: <A>\" { BEGIN str; clen = 0; }
195:
196: <A>#.* ;
197:
198: <A>. { yylval.i = yytext[0]; return(yytext[0]); }
199:
200: <str>\" { BEGIN A; cbuf[clen] = 0;
201: yylval.p = tostring(cbuf); return(STRING); }
202: <str>\n { ERROR "newline in string" WARNING; BEGIN A; return(ST); }
203: <str>"\\\"" { cbuf[clen++] = '\\'; cbuf[clen++] = '"'; }
204: <str>"\\\\" { cbuf[clen++] = '\\'; cbuf[clen++] = '\\'; }
205: <str>. { CADD; }
206:
207: %%
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