1 files changed, 99 insertions, 0 deletions
diff --git a/private/crt32/mbstring/mbsnbcat.c b/private/crt32/mbstring/mbsnbcat.c
new file mode 100644
index 000000000..b2da5d812
--- /dev/null
+++ b/private/crt32/mbstring/mbsnbcat.c
@@ -0,0 +1,99 @@
+/*** 
+*mbsnbcat.c - concatenate string2 onto string1, max length n bytes
+*
+*	Copyright (c) 1985-1993, Microsoft Corporation.  All rights reserved.
+*
+*Purpose:
+*	defines mbsnbcat() - concatenate maximum of n bytes
+*
+*Revision History:
+*	08-03-93  KRS	Ported from 16-bit sources.
+*	08-20-93  CFW   Update _MBCS_OS support.
+*
+*******************************************************************************/
+
+#ifdef _MBCS
+#include <cruntime.h>
+#include <mbdata.h>
+#include <mbctype.h>
+#include <mbstring.h>
+
+#define _MBSBTYPE(str,len)	_mbsbtype(str,len)
+
+/***
+* _mbsnbcat - concatenate max cnt bytes onto dst
+*
+*Purpose:
+*	Concatenates src onto dst, with a maximum of cnt bytes copied.
+*	Handles 2-byte MBCS characters correctly.
+*
+*Entry:
+*	unsigned char *dst - string to concatenate onto
+*	unsigned char *src - string to concatenate from
+*	int cnt - number of bytes to copy
+*
+*Exit:
+*	returns dst, with src (at least part) concatenated on
+*
+*Exceptions:
+*
+*******************************************************************************/
+
+unsigned char * _CRTAPI1 _mbsnbcat(dst, src, cnt)
+unsigned char *dst;
+const unsigned char *src;
+size_t cnt;
+{
+	unsigned char *start;
+
+	if (!cnt)
+		return(dst);
+
+	start = dst;
+	while (*dst++)
+                ;
+	--dst;		// dst now points to end of dst string
+
+
+	/* if last char in string is a lead byte, back up pointer */
+
+#ifdef _KANJI
+    if (_MBSBTYPE(start, (int) ((dst - start) - 1)) == _MBC_LEAD)
+		--dst;
+#else /* _MBCS_OS */
+    if (_ismbslead(start, dst))
+		--dst;
+#endif
+
+	/* copy over the characters */
+
+	while (cnt--) {
+
+		if (_ISLEADBYTE(*src)) {
+			*dst++ = *src++;
+			if (!cnt--) {	/* write nul if cnt exhausted */
+				dst[-1] = '\0';
+				break;
+			}
+			if ((*dst++ = *src++)=='\0') { /* or if no trail byte */
+				dst[-2] = '\0';
+                                break;
+                        }
+                }
+
+		else if ((*dst++ = *src++) == '\0')
+                        break;
+
+        }
+
+	/* enter final nul, if necessary */
+
+	if (_MBSBTYPE(start, (int) ((dst - start) - 1)) == _MBC_LEAD)
+	    dst[-1] = '\0';
+	else
+	    *dst = '\0';
+
+
+	return(start);
+}
+#endif	/* _MBCS */