update filesystem

examples/filesystem/hello_filesystem_flash.nim

@@ -23,6 +23,10 @@ else:
     close(fp)
     echo "HELLO.TXT: ", buffer
 
+  echo "list files in root:"
+  for file in fsWalkDir("/"):
+    echo file
+
   echo "unmounting: ", fsStrerror(fsUnmount("/"))
 
 while true:

examples/filesystem/hello_filesystem_sd.nim

@@ -1,14 +1,8 @@
 import picostdlib
 import picostdlib/pico/filesystem
-import std/posix
-import std/os
 
 # see hello_filesystem_sd.nims
 
-# workaround
-#{.emit: "#define lstat stat".}
-proc lstat(path: cstring; buf: var Stat): cint {.exportc.} = stat(path, buf)
-
 const csPin = Gpio(22) # Change to the pin your sdcard uses
 
 stdioInitAll()
@@ -48,7 +42,7 @@ else:
     echo "HELLO.TXT: ", buffer
 
   echo "list files in sdcard root:"
-  for file in walkDir("/sd"):
+  for file in fsWalkDir("/sd"):
     echo file
 
   echo "unmounting: ", fsStrerror(fsUnmount("/sd"))

src/picostdlib/pico/filesystem.nim

@@ -1,5 +1,7 @@
 import std/os, std/strutils, std/posix
 
+export os, posix
+
 const picoVfsPath = currentSourcePath.replace('\\', DirSep).parentDir.parentDir / "vendor" / "pico-vfs"
 
 {.compile: picoVfsPath / "src" / "filesystem" / "vfs.c".}
@@ -37,8 +39,8 @@ type
 
 type
   DirectoryEntry* {.importc: "struct dirent".} = object
-    dtype* {.importc: "d_type".}: DirectoryType
-    dname* {.importc: "d_name".}: array[255 + 1, char]
+    d_type*: DirectoryType
+    d_name*: array[255 + 1, char]
 
   FilesystemFile* {.importc: "fs_file_t".} = object
     fd*: cint
@@ -311,3 +313,18 @@ when defined(pico_filesystem_filesystem_fat) or defined(nimcheck):
     ## \param fs littlefs file system object
 
   {.pop.}
+
+
+# old workaround
+#{.emit: "#define lstat stat".}
+# proc lstat(path: cstring; buf: var Stat): cint {.exportc.} = stat(path, buf)
+iterator fsWalkDir*(directory: string): tuple[kind: DirectoryType, name: string] =
+  var dirent: ptr Dirent
+  var dir = opendir(directory.cstring)
+  assert(not dir.isNil)
+  defer: assert(closedir(dir) == 0)
+  while (dirent = readdir(dir); not dirent.isNil):
+    yield (
+      kind: cast[DirectoryType](dirent.d_type),
+      name: $cast[cstring](dirent.d_name[0].addr)
+    )