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49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/* File : strxnmov.c
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Author : Richard A. O'Keefe.
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Updated: 2 June 1984
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Defines: strxnmov()
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strxnmov(dst, len, src1, ..., srcn, NullS)
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moves the first len characters of the concatenation of src1,...,srcn
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to dst. If there aren't that many characters, a NUL character will
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be added to the end of dst to terminate it properly. This gives the
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same effect as calling strxcpy(buff, src1, ..., srcn, NullS) with a
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large enough buffer, and then calling strnmov(dst, buff, len).
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It is just like strnmov except that it concatenates multiple sources.
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Beware: the last argument should be the null character pointer.
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Take VERY great care not to omit it! Also be careful to use NullS
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and NOT to use 0, as on some machines 0 is not the same size as a
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character pointer, or not the same bit pattern as NullS.
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Note: strxnmov is like strnmov in that it moves up to len
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characters; dst will be padded on the right with one NUL characters if
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needed.
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*/
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#include <my_global.h>
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#include "m_string.h"
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#include <stdarg.h>
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char *strxnmov(char *dst, size_t len, const char *src, ...)
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{
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va_list pvar;
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char *end_of_dst=dst+len;
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va_start(pvar,src);
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while (src != NullS)
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{
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do
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{
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if (dst == end_of_dst)
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goto end;
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}
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while ((*dst++ = *src++));
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dst--;
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src = va_arg(pvar, char *);
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}
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*dst=0;
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end:
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va_end(pvar);
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return dst;
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}
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