'\0' ?

From: Skybuck Flying (nospam_at_hotmail.com)
Date: 10/31/04 

Date: Sun, 31 Oct 2004 14:25:24 +0100

Hi,

I have a question about \0

This is the implementation of strcmp in glibc.

Which is probably the same on many other compilers/libraries.

My question is about this:

      if (c1 == '\0')

What does '\0' mean ?

Is that a null terminated character ?

Does that mean strcmp stops comparing as soon as it encounters a null
terminated character ?

#include <string.h>
#include <memcopy.h>

#undef strcmp

/* Compare S1 and S2, returning less than, equal to or
   greater than zero if S1 is lexicographically less than,
   equal to or greater than S2. */
int
strcmp (p1, p2)
     const char *p1;
     const char *p2;
{
  register const unsigned char *s1 = (const unsigned char *) p1;
  register const unsigned char *s2 = (const unsigned char *) p2;
  unsigned reg_char c1, c2;

  do
    {
      c1 = (unsigned char) *s1++;
      c2 = (unsigned char) *s2++;
      if (c1 == '\0')
 return c1 - c2;
    }
  while (c1 == c2);

  return c1 - c2;
}
libc_hidden_builtin_def (strcmp)

Bye,
  Skybuck.