Last change
on this file since 7bf3856 was 3ae31e9, checked in by Thomas Lopatic <thomas@…>, 8 years ago |
Imported original source code.
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100755
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File size:
895 bytes
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1 | /*
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2 | =============================================================================
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3 | strrev.c -- reverse a string
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4 | Version 1 -- 1988-02-03 -- D.N. Lynx Crowe
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5 |
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6 | char *
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7 | strrev(s1, s2)
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8 | char *s1;
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9 | char *s2;
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10 |
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11 | Copies string 's2' into 's1'. 's1' must be large enough
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12 | to hold 's2'. Returns 's1'.
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13 | =============================================================================
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14 | */
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15 |
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16 | char *
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17 | strrev(s1, s2)
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18 | char *s1;
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19 | register char *s2;
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20 | {
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21 | register char *s3;
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22 | register long i;
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23 |
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24 | i = 0L; /* initialize string length */
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25 | s3 = s1; /* initialize target left end pointer */
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26 |
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27 | while (*s2) { /* find right end of source string */
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28 |
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29 | ++s2;
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30 | ++i;
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31 | }
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32 |
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33 | --s2; /* adjust source right end pointer */
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34 |
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35 | while (i--) /* copy string in reverse */
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36 | *s3++ = *s2--;
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37 |
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38 | *s3 = '\0'; /* terminate the string */
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39 | return(s1); /* return address of reversed string */
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40 | }
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