C analogue of parse-float.js

parse-float.c

/* CFLAGS=-O2 make parse-float */

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main (int argc, const char *argv[])
{
  const char *buf = "0.45494253843119004";
  int i;
  float f;
  clock_t start, stop;

  f = strtod(buf, (char **)NULL);
  f = strtod(buf, (char **)NULL);
  f = strtod(buf, (char **)NULL);

  start = clock();
  for (i=0; i < 1000000; i++)
    f = strtod(buf, (char **)NULL);
  stop = clock();

  printf("%g %lu\n", f, stop-start);
  return 0;
}