freebsd-dev/contrib/libf2c/libF77/s_cmp.c

#include "f2c.h"

/* compare two strings */

integer
s_cmp (char *a0, char *b0, ftnlen la, ftnlen lb)
{
  register unsigned char *a, *aend, *b, *bend;
  a = (unsigned char *) a0;
  b = (unsigned char *) b0;
  aend = a + la;
  bend = b + lb;

  if (la <= lb)
    {
      while (a < aend)
	if (*a != *b)
	  return (*a - *b);
	else
	  {
	    ++a;
	    ++b;
	  }

      while (b < bend)
	if (*b != ' ')
	  return (' ' - *b);
	else
	  ++b;
    }

  else
    {
      while (b < bend)
	if (*a == *b)
	  {
	    ++a;
	    ++b;
	  }
	else
	  return (*a - *b);
      while (a < aend)
	if (*a != ' ')
	  return (*a - ' ');
	else
	  ++a;
    }
  return (0);
}