Mercurial > ~dholland > hg > ag > index.cgi
annotate tests/agcl/ffcalc/ffc-r.syn @ 22:5581ef01f993
Regen all the AG output.
This also fixes the line number output in the tools
(cgbigen/helpgen/help2html), apparently because those files weren't
regenerated last go.
author | David A. Holland |
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date | Mon, 13 Jun 2022 00:06:39 -0400 |
parents | 13d2b8934445 |
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rev | line source |
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1 {/* FOUR FUNCTION CALCULATOR: FFCALC.SYN */} |
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2 |
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3 // -- CONFIGURATION SECTION ---------------------------- |
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4 [ |
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5 default token type = double |
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6 disregard white space |
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7 lexeme { real} |
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8 reentrant parser |
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9 ] |
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10 |
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11 // -- FOUR FUNCTION CALCULATOR ------------------------- |
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12 (void) calculator $ |
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13 -> [calculation?, '\n']..., eof |
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14 |
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15 (void) calculation |
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16 -> expression:x =printf("%g\n",x); |
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17 -> name:n, '=', expression:x ={ |
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18 printf("%c = %g\n",n+'A',value[n]=x);} |
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19 -> error |
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20 |
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21 expression |
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22 -> term |
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23 -> expression:x, '+', term:t = x+t; |
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24 -> expression:x, '-', term:t = x-t; |
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25 |
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26 term |
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27 -> factor |
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28 -> term:t, '*', factor:f = t*f; |
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29 -> term:t, '/', factor:f = t/f; |
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30 |
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31 factor |
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32 -> name:n = value[n]; |
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33 -> real |
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34 -> '(', expression:x, ')' = x; |
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35 -> '-', factor:f = -f; |
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36 |
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37 // -- LEXICAL UNITS ------------------------------------ |
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38 digit = '0-9' |
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39 eof = -1 |
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40 |
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41 (void) white space |
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42 -> ' ' + '\t' + '\r' + '\f' + '\v' |
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43 -> "/*", ~eof?..., "*/" |
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44 |
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45 (int) name |
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46 -> 'a-z' + 'A-Z':c = c-'A'; |
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47 |
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48 real |
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49 -> integer part:i, '.', fraction part:f = i+f; |
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50 -> integer part, '.'? |
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51 -> '.', fraction part:f = f; |
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52 |
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53 integer part |
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54 -> digit:d = d-'0'; |
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55 -> integer part:x, digit:d = 10*x + d-'0'; |
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56 |
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57 fraction part |
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58 -> digit:d =(d-'0')/10.; |
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59 -> digit:d, fraction part:f =(d-'0' + f)/10.; |
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60 |
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61 { /* -- EMBEDDED C ---------------------------------- */ |
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62 double value[64]; /* registers */ |
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63 int main(void) { |
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64 ffcalc_pcb_type pcb; |
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65 ffcalc(&pcb); |
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66 return 0; |
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67 } |
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68 } /* -- END OF EMBEDDED C ----------------------------*/ |