New function to turn foo/bar into foo/subfolders/bar. The inverse function

* e-path.c (e_path_to_physical): New function to turn foo/bar into
	foo/subfolders/bar. The inverse function doesn't exist yet because
	I didn't need it. Also, if the shell were going to use this, we'd
	need a few more tools...

	* Makefile.am (libeutil_la_SOURCES): Add e-path.[ch]

svn path=/trunk/; revision=8467

e-util/ChangeLog

@@ -1,3 +1,12 @@
+2001-03-01  Dan Winship  <danw@ximian.com>
+
+	* e-path.c (e_path_to_physical): New function to turn foo/bar into
+	foo/subfolders/bar. The inverse function doesn't exist yet because
+	I didn't need it. Also, if the shell were going to use this, we'd
+	need a few more tools...
+
+	* Makefile.am (libeutil_la_SOURCES): Add e-path.[ch]
+
 2001-03-01  Not Zed  <NotZed@Ximian.com>
 
 	* e-sexp.c (e_sexp_encode_string): Make it handle a NULL string as

e-util/Makefile.am

@@ -35,6 +35,8 @@ libeutil_la_SOURCES =			\
 	e-memory.h			\
 	e-msgport.c			\
 	e-msgport.h			\
+	e-path.c			\
+	e-path.h			\
 	e-sexp.c			\
 	e-sexp.h			\
 	e-dbhash.c			\

e-util/e-path.c

@@ -0,0 +1,118 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+/* e-path.c
+ *
+ * Copyright (C) 2001 Ximian, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <config.h>
+
+#include <string.h>
+#include <glib.h>
+#include "e-path.h"
+
+#define SUBFOLDER_DIR_NAME     "subfolders"
+#define SUBFOLDER_DIR_NAME_LEN 10
+
+/**
+ * e_path_to_physical:
+ * @prefix: a prefix to prepend to the path, or %NULL
+ * @path: the virtual path to convert to a filesystem path.
+ *
+ * This converts the "virtual" path @path into an expanded form that
+ * allows a given name to refer to both a file and a directory. The
+ * expanded path will have a "subfolders" directory inserted between
+ * each path component.
+ *
+ * If @prefix is non-%NULL, it will be prepended to the returned path.
+ *
+ * Return value: the expanded path
+ **/
+char *
+e_path_to_physical (const char *prefix, const char *vpath)
+{
+	const char *p, *newp;
+	char *dp;
+	char *ppath;
+	int ppath_len;
+	int prefix_len;
+
+	while (vpath == '/')
+		vpath++;
+	if (!prefix)
+		prefix = "";
+
+	/* Calculate the length of the real path. */
+	ppath_len = strlen (vpath);
+	ppath_len++;	/* For the ending zero.  */
+
+	prefix_len = strlen (prefix);
+	ppath_len += prefix_len;
+	ppath_len++;	/* For the separating slash.  */
+
+	/* Take account of the fact that we need to translate every
+	 * separator into `subfolders/'.
+	 */
+	p = vpath;
+	while (1) {
+		newp = strchr (p, '/');
+		if (newp == NULL)
+			break;
+
+		ppath_len += SUBFOLDER_DIR_NAME_LEN;
+		ppath_len++; /* For the separating slash.  */
+
+		/* Skip consecutive slashes.  */
+		while (*newp == '/')
+			newp++;
+
+		p = newp;
+	};
+
+	ppath = g_malloc (ppath_len);
+	dp = ppath;
+
+	memcpy (dp, prefix, prefix_len);
+	dp += prefix_len;
+	*(dp++) = '/';
+
+	/* Copy the mangled path.  */
+	p = vpath;
+ 	while (1) {
+		newp = strchr (p, '/');
+		if (newp == NULL) {
+			strcpy (dp, p);
+			break;
+		}
+
+		memcpy (dp, p, newp - p + 1); /* `+ 1' to copy the slash too.  */
+		dp += newp - p + 1;
+
+		memcpy (dp, SUBFOLDER_DIR_NAME, SUBFOLDER_DIR_NAME_LEN);
+		dp += SUBFOLDER_DIR_NAME_LEN;
+
+		*(dp++) = '/';
+
+		/* Skip consecutive slashes.  */
+		while (*newp == '/')
+			newp++;
+
+		p = newp;
+	}
+
+	return ppath;
+}

e-util/e-path.h

@@ -0,0 +1,26 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* 
+ * Copyright (C) 2001 Ximian, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __E_PATH__
+#define __E_PATH__
+
+char *e_path_to_physical (const char *prefix, const char *vpath);
+
+#endif /* __E_PATH__ */