1 files changed, 93 insertions, 0 deletions
diff --git a/src/lib/libast/path/pathrepl.c b/src/lib/libast/path/pathrepl.c
new file mode 100644
index 0000000..d16a390
--- /dev/null
+++ b/src/lib/libast/path/pathrepl.c
@@ -0,0 +1,93 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
+*                      and is licensed under the                       *
+*                 Eclipse Public License, Version 1.0                  *
+*                    by AT&T Intellectual Property                     *
+*                                                                      *
+*                A copy of the License is available at                 *
+*          http://www.eclipse.org/org/documents/epl-v10.html           *
+*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
+*                                                                      *
+*              Information and Software Systems Research               *
+*                            AT&T Research                             *
+*                           Florham Park NJ                            *
+*                                                                      *
+*                 Glenn Fowler <gsf@research.att.com>                  *
+*                  David Korn <dgk@research.att.com>                   *
+*                   Phong Vo <kpv@research.att.com>                    *
+*                                                                      *
+***********************************************************************/
+#pragma prototyped
+/*
+ * Glenn Fowler
+ * AT&T Bell Laboratories
+ *
+ * in place replace of first occurrence of /match/ with /replace/ in path
+ * end of path returned
+ */
+
+#define _AST_API_H	1
+
+#include <ast.h>
+
+char*
+pathrepl(char* path, const char* match, const char* replace)
+{
+	return pathrepl_20100601(path, PATH_MAX, match, replace);
+}
+
+#undef	_AST_API_H
+
+#include <ast_api.h>
+
+char*
+pathrepl_20100601(register char* path, size_t size, const char* match, register const char* replace)
+{
+	register const char*	m = match;
+	register const char*	r;
+	char*			t;
+
+	if (!match)
+		match = "";
+	if (!replace)
+		replace = "";
+	if (streq(match, replace))
+		return(path + strlen(path));
+	if (!size)
+		size = strlen(path) + 1;
+	for (;;)
+	{
+		while (*path && *path++ != '/');
+		if (!*path) break;
+		if (*path == *m)
+		{
+			t = path;
+			while (*m && *m++ == *path) path++;
+			if (!*m && *path == '/')
+			{
+				register char*	p;
+
+				p = t;
+				r = replace;
+				while (p < path && *r) *p++ = *r++;
+				if (p < path) while (*p++ = *path++);
+				else if (*r && p >= path)
+				{
+					register char*	u;
+
+					t = path + strlen(path);
+					u = t + strlen(r);
+					while (t >= path) *u-- = *t--;
+					while (*r) *p++ = *r++;
+				}
+				else p += strlen(p) + 1;
+				return(p - 1);
+			}
+			path = t;
+			m = match;
+		}
+	}
+	return(path);
+}