initial commit - import mediafire-shell sources

cmd_chdir.c

@@ -0,0 +1,82 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "strings.h"
+#include "mfshell.h"
+#include "private.h"
+#include "command.h"
+
+int
+mfshell_cmd_chdir(mfshell_t *mfshell,const char *folderkey)
+{
+    folder_t    *folder_new;
+    const char  *folder_curr;
+    const char  *folder_parent;
+    int         retval;
+
+    if(mfshell == NULL) return -1;
+    if(folderkey == NULL) return -1;
+
+    // change to root
+    if(strcmp(folderkey,"/") == 0) folderkey = "myfiles";
+
+    // user wants to navigate up a level
+    if(strcmp(folderkey,"..") == 0)
+    {
+        // do several sanity checks to see if we're already at the root
+        folder_curr = folder_get_key(mfshell->folder_curr);
+
+        if(folder_curr == NULL) return 0;
+        if(strcmp(folder_curr,"myfiles") == 0) return 0;
+
+        folder_parent = folder_get_parent(mfshell->folder_curr);
+
+        if(folder_parent == NULL) return 0;
+
+        // it's pretty sure that we're not at the root
+        folderkey = folder_parent;
+    }
+
+    // check the lenght of the key
+    if(strlen(folderkey) != 13)
+    {
+        // as a folder moniker, "myfiles" is an exception
+        if(strcmp(folderkey,"myfiles") != 0) return -1;
+    }
+
+    // create a new folder object to store the results
+    folder_new = folder_alloc();
+
+    // navigate to root is a special case
+    if(strcmp(folderkey,"myfiles") == 0)
+    {
+        folder_set_key(folder_new,"myfiles");
+        retval = 0;
+    }
+    else
+    {
+        retval = mfshell->folder_get_info(mfshell,
+            folder_new,(char*)folderkey);
+        mfshell->update_secret_key(mfshell);
+    }
+
+    if(retval == 0)
+    {
+        if(mfshell->folder_curr != NULL)
+        {
+            folder_free(mfshell->folder_curr);
+            mfshell->folder_curr = NULL;
+        }
+
+        mfshell->folder_curr = folder_new;
+    }
+    else
+    {
+        folder_free(folder_new);
+    }
+
+    return retval;
+}
+
+