fygue: support close() primitive for file

CMakeLists.txt

@@ -270,12 +270,14 @@ set(SOURCES
   src/fs/fygue/fygue_dir_close.c
   src/fs/fygue/fygue_file_lseek.c
   src/fs/fygue/fygue_file_write.c
+  src/fs/fygue/fygue_file_close.c
   src/fs/fygue/fat/cluster.c
   src/fs/fygue/fat/initialize.c
   src/fs/fygue/fat/fat_dir_read.c
   src/fs/fygue/fat/fat_dir_close.c
   src/fs/fygue/fat/fat_dir_stat.c
   src/fs/fygue/fat/fat_file_stat.c
+  src/fs/fygue/fat/fat_file_close.c
   src/fs/fygue/fat/resolve.c
   src/fs/fygue/fat/sector.c
   src/fs/fygue/flash/cluster.c

src/fs/fygue/fat/fat.h

@@ -152,6 +152,12 @@ extern int fygue_fat_file_stat(
     struct stat *statbuf
 );
 
+/* fygue_fat_file_close(): closedir primitive */
+extern int fygue_fat_file_close(
+    struct fygue_fat *fat,
+    struct fygue_fat_file *dir
+);
+
 //---
 // Cluster interface
 //---

src/fs/fygue/fat/fat_dir_close.c

@@ -1,3 +1,4 @@
+#include <string.h>
 #include "fat.h"
 
 /* fygue_fat_dir_close(): closedir primitive */
@@ -6,6 +7,7 @@ int fygue_fat_dir_close(struct fygue_fat *fat, struct fygue_fat_dir *dir)
     if (fat == NULL || dir == NULL)
         return -1;
     // nothing to do here...
+    memset(dir, 0x00, sizeof(struct fygue_fat_file));
     return 0;
 }
 

src/fs/fygue/fat/fat_file_close.c

@@ -0,0 +1,14 @@
+#include <string.h>
+#include <stdlib.h>
+#include "fat.h"
+
+/* fygue_fat_file_close(): close primitive */
+int fygue_fat_file_close(struct fygue_fat *fat, struct fygue_fat_file *file)
+{
+    if (fat == NULL || file == NULL)
+        return -1;
+    if (file->chunk != NULL)
+        free(file->chunk);
+    memset(file, 0x00, sizeof(struct fygue_fat_file));
+    return 0;
+}

src/fs/fygue/fygue.c

@@ -87,7 +87,7 @@ const fs_descriptor_type_t fygue_descriptor_type = {
     .read   = NULL,
     .write  = (void*)&fygue_file_write,
     .lseek  = (void*)&fygue_file_lseek,
-    .close  = NULL,
+    .close  = (void*)&fygue_file_close,
 };
 
 const fs_descriptor_type_t fygue_dir_descriptor_type = {

src/fs/fygue/fygue.h

@@ -141,6 +141,9 @@ extern ssize_t fygue_file_write(
     size_t size
 );
 
+/* fygue_file_close(): close directory */
+extern int fygue_file_close(struct fygue_descriptor *desc);
+
 #ifdef __cplusplus
 }
 #endif

src/fs/fygue/fygue_file_close.c

@@ -0,0 +1,23 @@
+#include <stdlib.h>
+#include <string.h>
+#include "fygue.h"
+#include "fat/fat.h"
+
+/* fygue_file_close(): close directory */
+int fygue_file_close(struct fygue_descriptor *desc)
+{
+    struct fygue_fsinfo *fsinfo;
+
+    ENOTSUP_IF_NOT_FYGUE(-1);
+    if (desc == NULL || desc->resolve.type != FYGUE_FILE_TYPE_FILE) {
+        errno = EBADF;
+        return -1;
+    }
+    if (fygue_mount(&fsinfo, true) != 0) {
+        errno = EIO;
+        return -1;
+    }
+    fygue_fat_file_close(&(fsinfo->fat), &desc->resolve.file.fat);
+    memset(desc, 0x00, sizeof(struct fygue_descriptor));
+    return 0;
+}