libf2c/libI77/fmtlib.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46

/*	@(#)fmtlib.c	1.2	*/
#define MAXINTLENGTH 23
#include "config.h"

#include "f2c.h"
#ifndef Allow_TYQUAD
#undef longint
#define longint long
#undef ulongint
#define ulongint unsigned long
#endif

char *
f__icvt (longint value, int *ndigit, int *sign, int base)
{
  static char buf[MAXINTLENGTH + 1];
  register int i;
  ulongint uvalue;

  if (value > 0)
    {
      uvalue = value;
      *sign = 0;
    }
  else if (value < 0)
    {
      uvalue = -value;
      *sign = 1;
    }
  else
    {
      *sign = 0;
      *ndigit = 1;
      buf[MAXINTLENGTH - 1] = '0';
      return &buf[MAXINTLENGTH - 1];
    }
  i = MAXINTLENGTH;
  do
    {
      buf[--i] = (uvalue % base) + '0';
      uvalue /= base;
    }
  while (uvalue > 0);
  *ndigit = MAXINTLENGTH - i;
  return &buf[i];
}