From c348f82e29356fc95dcb6331b4860b2d76fa07aa Mon Sep 17 00:00:00 2001 From: Rob Pike Date: Thu, 12 Jun 2008 13:26:16 -0700 Subject: import the plan 9 libraries libc (lib9) and libbio into the tree. remove the dependency on /home/r. SVN=122482 --- src/lib9/utf/utfutf.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 src/lib9/utf/utfutf.c (limited to 'src/lib9/utf/utfutf.c') diff --git a/src/lib9/utf/utfutf.c b/src/lib9/utf/utfutf.c new file mode 100644 index 000000000..13c850208 --- /dev/null +++ b/src/lib9/utf/utfutf.c @@ -0,0 +1,41 @@ +/* + * The authors of this software are Rob Pike and Ken Thompson. + * Copyright (c) 2002 by Lucent Technologies. + * Permission to use, copy, modify, and distribute this software for any + * purpose without fee is hereby granted, provided that this entire notice + * is included in all copies of any software which is or includes a copy + * or modification of this software and in all copies of the supporting + * documentation for such software. + * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE + * ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY + * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE. + */ +#include +#include +#include "plan9.h" +#include "utf.h" + + +/* + * Return pointer to first occurrence of s2 in s1, + * 0 if none + */ +char* +utfutf(char *s1, char *s2) +{ + char *p; + long f, n1, n2; + Rune r; + + n1 = chartorune(&r, s2); + f = r; + if(f <= Runesync) /* represents self */ + return strstr(s1, s2); + + n2 = strlen(s2); + for(p=s1; p=utfrune(p, f); p+=n1) + if(strncmp(p, s2, n2) == 0) + return p; + return 0; +} -- cgit v1.2.3