Rockbox as an application: add get_user_file_path().

For RaaA it evaluates user paths at runtime. For everything but codecs/plugins it will give the path under $HOME/.config/rockbox.org if write access is needed or if the file/folder in question exists there (otherwise it gives /usr/local/share/rockbox).
This allows for installing themes under $HOME as well as having config.cfg and other important files there while installing the application (and default themes) under /usr/local.

On the DAPs it's a no-op, returing /.rockbox directly.

Not converted to use get_user_file_path() are plugins themselves, because RaaA doesn't build plugins yet.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27656 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 37 insertions, 0 deletions

diff --git a/firmware/common/filefuncs.c b/firmware/common/filefuncs.c
index ca9113250a..c058267094 100644
--- a/firmware/common/filefuncs.c
+++ b/firmware/common/filefuncs.c
@@ -22,6 +22,7 @@
 #include "dir.h"
 #include "stdlib.h"
 #include "string.h"
+#include "debug.h"
 
 #ifdef HAVE_MULTIVOLUME
 /* returns on which volume this is, and copies the reduced name
@@ -50,3 +51,39 @@ int strip_volume(const char* name, char* namecopy)
     return volume;
 }
 #endif /* #ifdef HAVE_MULTIVOLUME */
+
+#ifndef __PCTOOL__
+/* Test file existence, using dircache of possible */
+bool file_exists(const char *file)
+{
+    int fd;
+
+#ifdef DEBUG
+    if (!file || strlen(file) <= 0)
+    {
+        DEBUGF("%s(): Invalid parameter!\n");
+        return false;
+    }
+#endif
+
+#ifdef HAVE_DIRCACHE
+    if (dircache_is_enabled())
+        return (dircache_get_entry_ptr(file) != NULL);
+#endif
+
+    fd = open(file, O_RDONLY);
+    if (fd < 0)
+        return false;
+    close(fd);
+    return true;
+}
+
+bool dir_exists(const char *path)
+{
+    DIR* d = opendir(path);
+    if (!d)
+        return false;
+    closedir(d);
+    return true;
+}
+#endif /* __PCTOOL__ */