xtoa.cpp File Reference

#include <stdlib.h>
#include <limits.h>
#include "GaudiKernel/xtoa.h"

Include dependency graph for xtoa.cpp:

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Functions
static void __cdecl	xtoa (unsigned long val, char *buf, unsigned radix, int is_neg)
char *__cdecl	_itoa (int val, char *buf, int radix)
char *__cdecl	_ltoa (long val, char *buf, int radix)
char *__cdecl	_ultoa (unsigned long val, char *buf, int radix)

---

Function Documentation

char* __cdecl _itoa	(	int	val,
		char *	buf,
		int	radix
	)

Definition at line 83 of file xtoa.cpp.

                                                                 {
  if (radix == 10 && val < 0)
    xtoa((unsigned long)val, buf, radix, 1);
  else
    xtoa((unsigned long)(unsigned int)val, buf, radix, 0);
  return buf;
}

char* __cdecl _ltoa	(	long	val,
		char *	buf,
		int	radix
	)

Definition at line 91 of file xtoa.cpp.

                                                                 {
  xtoa((unsigned long)val, buf, radix, (radix == 10 && val < 0));
  return buf;
}

char* __cdecl _ultoa	(	unsigned long	val,
		char *	buf,
		int	radix
	)

Definition at line 96 of file xtoa.cpp.

                                                                                {
  xtoa(val, buf, radix, 0);
  return buf;
}

static void __cdecl xtoa	(	unsigned long	val,
		char *	buf,
		unsigned	radix,
		int	is_neg
	)			[static]

Definition at line 39 of file xtoa.cpp.

                                                                                  {
  char *p;    /* pointer to traverse string */
  char *firstdig;   /* pointer to first digit */
  char temp;    /* temp char */
  unsigned digval;  /* value of digit */

  p = buf;

  if (is_neg) {
    /* negative, so output '-' and negate */
    *p++ = '-';
    val = (unsigned long)(-(long)val);
  }

  firstdig = p;     /* save pointer to first digit */

  do {
    digval = (unsigned) (val % radix);
    val /= radix;   /* get next digit */

    /* convert to ascii and store */
    if (digval > 9)
      *p++ = (char) (digval - 10 + 'a');  /* a letter */
    else
      *p++ = (char) (digval + '0');       /* a digit */
  } while (val > 0);

  /* We now have the digit of the number in the buffer, but in reverse
     order.  Thus we reverse them now. */

  *p-- = '\0';    /* terminate string; p points to last digit */

  do {
    temp = *p;
    *p = *firstdig;
    *firstdig = temp;   /* swap *p and *firstdig */
    --p;
    ++firstdig;   /* advance to next two digits */
  } while (firstdig < p); /* repeat until halfway */
}