add routines to get dir entries

1 files changed, 64 insertions, 0 deletions

diff --git a/Library/UefiShellUfmCommandLib/dir.c b/Library/UefiShellUfmCommandLib/dir.c
new file mode 100644
index 0000000..12bc13b
--- /dev/null
+++ b/Library/UefiShellUfmCommandLib/dir.c
@@ -0,0 +1,64 @@
+#include <Library/UefiLib.h>
+#include <Library/DebugLib.h>
+#include <Library/ShellLib.h>
+#include <Library/BaseLib.h>
+#include <Library/MemoryAllocationLib.h>
+
+#include "dir.h"
+
+struct dir_list *dirl_alloc(CHAR16 *search_path, CONST UINT64 attr)
+{
+	EFI_STATUS status = EFI_SUCCESS;
+	EFI_SHELL_FILE_INFO *list_head = NULL, *node = NULL;
+	UINTN length = 0;
+	struct dir_list *dl;
+
+	status = ShellOpenFileMetaArg(search_path, EFI_FILE_MODE_READ, &list_head);
+	if(EFI_ERROR(status))
+		return NULL;
+
+	for(node = (EFI_SHELL_FILE_INFO *)GetFirstNode(&list_head->Link);
+			!IsNull(&list_head->Link, &node->Link);
+			node = (EFI_SHELL_FILE_INFO *)GetNextNode(&list_head->Link, &node->Link))
+	{
+		ASSERT(node != NULL);
+		ASSERT(node->Info != NULL);
+		ASSERT((node->Info->Attribute & EFI_FILE_VALID_ATTR) == node->Info->Attribute);
+
+		if((node->Info->Attribute & attr) != attr ||
+				StrCmp(node->FileName, L".") == 0) {
+			EFI_SHELL_FILE_INFO *tmp;
+			tmp = (EFI_SHELL_FILE_INFO *)GetPreviousNode(&list_head->Link, &node->Link);
+			
+			// I have stolen code below in the source code of InternalFreeShellFileInfoNode():
+			RemoveEntryList(&node->Link);
+			FreePool((VOID*)node->Info);
+			FreePool((VOID*)node->FileName);
+			FreePool((VOID*)node->FullName);
+			gEfiShellProtocol->CloseFile(node->Handle);
+			FreePool(node);
+			node = tmp;
+			continue;
+		}
+
+		length++;
+	}
+
+	dl = AllocatePool(sizeof(struct dir_list));
+	if(!dl) {
+		ShellCloseFileMetaArg(&list_head);
+		return NULL;
+	}
+
+	dl->list_head = list_head;
+	dl->len = length;
+	return dl;
+}	
+
+VOID dirl_release(struct dir_list *dl)
+{
+	if(dl->list_head)
+		ShellCloseFileMetaArg(&dl->list_head);
+
+	FreePool(dl);
+}