60 lines
1.3 KiB
C++
60 lines
1.3 KiB
C++
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <math.h>
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#include "calc.yy.h"
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#include "calculator.h"
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extern void yyparse ();
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extern "C" int yywrap () {
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return 1;
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}
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static char * from_file (const char * filename) {
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struct stat statbuf;
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int r = stat (filename, & statbuf);
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if (r) return nullptr;
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char * buffer = (char*) malloc (statbuf.st_size + 1);
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FILE * in = fopen (filename,"r");
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r = fread (buffer, 1, statbuf.st_size, in);
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if (r != statbuf.st_size) {
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free (buffer);
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fclose (in);
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return nullptr;
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}
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buffer [r] = '\0';
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fclose (in);
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return buffer;
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}
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void emitData (double * x, double * y, const int len) {
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for (int n=0; n<len; n++) {
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printf("f(%g) = %g\n", x[n], y[n]);
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}
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}
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/*
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static const char * multipliers [] = {"f","p","n","μ","m","","k","M","G","T","P"};
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static void test () {
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const int ofs = 5 * 3;
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for (int n=-15; n<18; n++) {
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div_t dt = div (n + ofs, 3);
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printf("n=%d, q=%d, r=%d (%d)\t%g %s\n", n, dt.quot, dt.rem, dt.quot * 3 + dt.rem - ofs,
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pow(10.0, dt.rem), multipliers[dt.quot]);
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}
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}
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*/
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int main () {
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char * buffer = from_file("test.txt");
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if (!buffer) return 1;
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initData();
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YY_BUFFER_STATE result = yy_scan_string(buffer);
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yyparse();
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yy_delete_buffer(result);
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free (buffer);
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finiData();
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//test();
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return 0;
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}
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