Mercurial > ~dholland > hg > ag > index.cgi

annotate examples/ffcalc/ffcalcx.syn @ 24:a4899cdfc2d6 default tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Obfuscate the regexps to strip off the IBM compiler's copyright banners. I don't want bots scanning github to think they're real copyright notices because that could cause real problems.
author David A. Holland
date Mon, 13 Jun 2022 00:40:23 -0400
parents 13d2b8934445
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
1 {/* FOUR FUNCTION CALCULATOR: FFCALCX.SYN */}
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
2
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
3 // -- CONFIGURATION SECTION ----------------------------
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
4 [
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
5 default token type = double
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
6 disregard white space
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
7 lexeme { real}
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
8 left { '+', '-'}
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
9 left { '*', '/'}
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
10 right {unary minus}
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
11 ]
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
12
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
13 // -- FOUR FUNCTION CALCULATOR -------------------------
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
14 (void) calculator $
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
15 -> [calculation?, '\n']..., eof
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
16
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
17 (void) calculation
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
18 -> expression:x =printf("%g\n",x);
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
19 -> name:n, '=', expression:x ={
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
20 printf("%c = %g\n",n+'A',value[n]=x);}
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
21 -> error
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
22
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
23 expression
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
24 -> name:n = value[n];
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
25 -> real
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
26 -> '(', expression:x, ')' = x;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
27 -> expression:x, '+', expression:t = x+t;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
28 -> expression:x, '-', expression:t = x-t;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
29 -> expression:t, '*', expression:f = t*f;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
30 -> expression:t, '/', expression:f = t/f;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
31 -> unary minus, expression:f = -f;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
32
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
33 // -- LEXICAL UNITS ------------------------------------
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
34 digit = '0-9'
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
35 eof = -1
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
36 unary minus = '-'
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
37
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
38 (void) white space
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
39 -> ' ' + '\t' + '\r' + '\f' + '\v'
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
40 -> "/*", ~eof?..., "*/"
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
41
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
42 (int) name
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
43 -> 'a-z' + 'A-Z':c = c-'A';
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
44
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
45 real
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
46 -> integer part:i, '.', fraction part:f = i+f;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
47 -> integer part, '.'?
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
48 -> '.', fraction part:f = f;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
49
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
50 integer part
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
51 -> digit:d = d-'0';
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
52 -> integer part:x, digit:d = 10*x + d-'0';
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
53
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
54 fraction part
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
55 -> digit:d =(d-'0')/10.;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
56 -> digit:d, fraction part:f =(d-'0' + f)/10.;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
57
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
58 { /* -- EMBEDDED C ---------------------------------- */
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
59 double value[64]; /* registers */
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
60 int main(void) {
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
61 ffcalcx();
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
62 return 0;
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
63 }
13d2b8934445 Import AnaGram (near-)release tree into Mercurial.
David A. Holland
parents:
diff changeset
64 } /* -- END OF EMBEDDED C ----------------------------*/