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- /* File : strcpack.c
- Author : Richard A. O'Keefe.
- Updated: 20 April 1984
- Defines: strcpack()
-
- strcpack(dst, src, set, c)
- copies characters from src to dst, stopping when it finds a NUL. If
- c is NUL, characters not in the set are not copied to dst. If c is
- not NUL, sequences of characters not in the set are copied as a
- single c. strcpack is to strpack as strcspn is to strspn. If your C
- compiler is happy with register _char_, change the declaration of c.
- The result is the address of the NUL byte that now terminates "dst".
- Note that dst may safely be the same as src.
- */
-
- #include "strings.h"
- #include "_str2set.h"
-
- char *strcpack(dst, src, set, c)
- register _char_ *dst, *src;
- char *set;
- register int c;
- {
- register int chr;
-
- _str2set(set);
- while (chr = *src++) {
- if (_set_vec[chr] != _set_ctr) {
- while ((chr = *src++) && _set_vec[chr] != _set_ctr) ;
- if (c) *dst++ = c; /* 1. If you don't want trailing */
- if (!chr) break; /* 2. things turned into "c", swap */
- } /* lines 1 and 2. */
- *dst++ = chr;
- }
- *dst = 0;
- return dst;
- }
-