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Annotation of researchv10no/cmd/f2c/memset.c, revision 1.1

1.1     ! root        1: /****************************************************************
        !             2: Copyright 1990 by AT&T Bell Laboratories and Bellcore.
        !             3: 
        !             4: Permission to use, copy, modify, and distribute this software
        !             5: and its documentation for any purpose and without fee is hereby
        !             6: granted, provided that the above copyright notice appear in all
        !             7: copies and that both that the copyright notice and this
        !             8: permission notice and warranty disclaimer appear in supporting
        !             9: documentation, and that the names of AT&T Bell Laboratories or
        !            10: Bellcore or any of their entities not be used in advertising or
        !            11: publicity pertaining to distribution of the software without
        !            12: specific, written prior permission.
        !            13: 
        !            14: AT&T and Bellcore disclaim all warranties with regard to this
        !            15: software, including all implied warranties of merchantability
        !            16: and fitness.  In no event shall AT&T or Bellcore be liable for
        !            17: any special, indirect or consequential damages or any damages
        !            18: whatsoever resulting from loss of use, data or profits, whether
        !            19: in an action of contract, negligence or other tortious action,
        !            20: arising out of or in connection with the use or performance of
        !            21: this software.
        !            22: ****************************************************************/
        !            23: 
        !            24: /* This is for the benefit of people whose systems don't provide
        !            25:  * memset, memcpy, and memcmp.  If yours is such a system, adjust
        !            26:  * the makefile by adding memset.o to the "OBJECTS =" assignment.
        !            27:  * WARNING: the memcpy below is adequate for f2c, but is not a
        !            28:  * general memcpy routine (which must correctly handle overlapping
        !            29:  * fields).
        !            30:  */
        !            31: 
        !            32:  int
        !            33: memcmp(s1, s2, n)
        !            34:  register char *s1, *s2;
        !            35:  int n;
        !            36: {
        !            37:        register char *se;
        !            38: 
        !            39:        for(se = s1 + n; s1 < se; s1++, s2++)
        !            40:                if (*s1 != *s2)
        !            41:                        return *s1 - *s2;
        !            42:        return 0;
        !            43:        }
        !            44: 
        !            45:  char *
        !            46: memcpy(s1, s2, n)
        !            47:  register char *s1, *s2;
        !            48:  int n;
        !            49: {
        !            50:        register char *s0 = s1, *se = s1 + n;
        !            51: 
        !            52:        while(s1 < se)
        !            53:                *s1++ = *s2++;
        !            54:        return s0;
        !            55:        }
        !            56: 
        !            57: memset(s, c, n)
        !            58:  register char *s;
        !            59:  register int c;
        !            60:  int n;
        !            61: {
        !            62:        register char *se = s + n;
        !            63: 
        !            64:        while(s < se)
        !            65:                *s++ = c;
        !            66:        }

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