1#define _GNU_SOURCE
2#include <stdlib.h>
3#include <stdio.h>
4
5char *ecvt(double x, int n, int *dp, int *sign)
6{
7 static char buf[16];
8 char tmp[32];
9 int i, j;
10
11 if (n-1U > 15) n = 15;
12 sprintf(tmp, "%.*e", n-1, x);
13 i = *sign = (tmp[0]=='-');
14 for (j=0; tmp[i]!='e'; j+=(tmp[i++]!='.'))
15 buf[j] = tmp[i];
16 buf[j] = 0;
17 *dp = atoi(tmp+i+1)+1;
18
19 return buf;
20}