/***
*char *strcpy(dst, src) – copy one string over another
*
*Purpose:
* Copies the string src into the spot specified by
* dest; assumes enough room.
*
*Entry:
* char * dst – string over which “src” is to be copied
* const char * src – string to be copied over “dst”
*
*Exit:
* The address of “dst”
*
*Exceptions:
*******************************************************************************/
char* strcpy(char * dst, const char * src)
{
char * cp = dst;
while( *cp++ = *src++ )
; /* Copy src over dst */
return( dst );
}
/***
*char *strcat(dst, src) – concatenate (append) one string to another
*
*Purpose:
* Concatenates src onto the end of dest. Assumes enough
* space in dest.
*
*Entry:
* char *dst – string to which “src” is to be appended
* const char *src – string to be appended to the end of “dst”
*
*Exit:
* The address of “dst”
*
*Exceptions:
*
*******************************************************************************/
Char* strcat ( char * dst , const char * src )
{
char * cp = dst;
while( *cp )
cp++; /* find end of dst */
while( *cp++ = *src++ ) ; /* Copy src to end of dst */
return( dst ); /* return dst */
}
/***
*strcmp – compare two strings, returning less than, equal to, or greater than
*
*Purpose:
* STRCMP compares two strings and returns an integer
* to indicate whether the first is less than the second, the two are
* equal, or whether the first is greater than the second.
*
* Comparison is done byte by byte on an UNSIGNED basis, which is to
* say that Null (0) is less than any other character (1-255).
*
*Entry:
* const char * src – string for left-hand side of comparison
* const char * dst – string for right-hand side of comparison
*
*Exit:
* returns -1 if src < dst
* returns 0 if src == dst
* returns +1 if src > dst
*
*Exceptions:
*
*******************************************************************************/
int strcmp ( const char* src, const char* dst )
{
int ret = 0 ;
while( ! (ret = *(unsigned char *)src – *(unsigned char *)dst) && *dst)
++src, ++dst;
if ( ret < 0 )
ret = -1 ;
else if ( ret > 0 )
ret = 1 ;
return( ret );
}
