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CPM OPERATING SYSTEMS/CPM 68K/1.0X SOURCES/v101/clib/strncat.c

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+/****************************************************************************
+*  STRNCAT  -  concatenate strings (limited)
+*
+*	BYTE *strncat(s1,s2,n)
+*	BYTE *s1, *s2; WORD n;
+*
+*	'strncat' copies at most n bytes of s2 onto the end of s1.
+*
+*	Assumes null terminated strings. No check is made for string area
+*		overflow.
+****************************************************************************/
+
+#include <portab.h>
+
+BYTE *strncat(s1,s2,n)			/* copies at most n chars.	*/
+REG	BYTE *s1, *s2;			/* 'n' unsigned: if n<0, we'll	*/
+REG	WORD n;				/*  still decrement to 0.	*/
+{
+	REG BYTE *cp;
+
+	for( cp=s1; *cp; cp++)		/* save s1 for return.		*/
+		;
+	while( *s2 && n-- > 0 )		/* copy until eos(s2) or n==0:	*/
+		*cp++ = *s2++;		/*  no copy if n==0.		*/
+	*cp = ZERO;			/* make sure string gets eos.	*/
+	return(s1);
+}