wmii

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utfecpy.c (1084B)

      1 /*
      2  * The authors of this software are Rob Pike and Ken Thompson.
      3  *              Copyright (c) 2002 by Lucent Technologies.
      4  * Permission to use, copy, modify, and distribute this software for any
      5  * purpose without fee is hereby granted, provided that this entire notice
      6  * is included in all copies of any software which is or includes a copy
      7  * or modification of this software and in all copies of the supporting
      8  * documentation for such software.
      9  * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
     10  * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE
     11  * ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
     12  * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
     13  */
     14 #include <stdarg.h>
     15 #include <string.h>
     16 #include "plan9.h"
     17 #include "utf.h"
     18 
     19 char*
     20 utfecpy(char *to, char *e, const char *from)
     21 {
     22 	char *end;
     23 
     24 	if(to >= e)
     25 		return to;
     26 	end = memccpy(to, from, '\0', e - to);
     27 	if(end == nil){
     28 		end = e-1;
     29 		while(end>to && (*--end&0xC0)==0x80)
     30 			;
     31 		*end = '\0';
     32 	}else{
     33 		end--;
     34 	}
     35 	return end;
     36 }