Added tox_file_send_seek() function to api.

This function can be used to seek an incoming file tranfer right
before accepting it.

It is meant to be used to resume incomplete file tranfers by clients.

1 files changed, 42 insertions, 0 deletions

diff --git a/toxcore/tox.c b/toxcore/tox.c
index 36f87cc6..87b8e8de 100644
--- a/toxcore/tox.c
+++ b/toxcore/tox.c
@@ -883,6 +883,48 @@ bool tox_file_send_control(Tox *tox, uint32_t friend_number, uint32_t file_numbe
     return 0;
 }
 
+bool tox_file_send_seek(Tox *tox, uint32_t friend_number, uint32_t file_number, uint64_t position,
+                        TOX_ERR_FILE_SEEK *error)
+{
+    Messenger *m = tox;
+    int ret = file_seek(m, friend_number, file_number, position);
+
+    if (ret == 0) {
+        SET_ERROR_PARAMETER(error, TOX_ERR_FILE_SEEK_OK);
+        return 1;
+    }
+
+    switch (ret) {
+        case -1:
+            SET_ERROR_PARAMETER(error, TOX_ERR_FILE_SEEK_FRIEND_NOT_FOUND);
+            return 0;
+
+        case -2:
+            SET_ERROR_PARAMETER(error, TOX_ERR_FILE_SEEK_FRIEND_NOT_CONNECTED);
+            return 0;
+
+        case -3:
+            SET_ERROR_PARAMETER(error, TOX_ERR_FILE_SEEK_NOT_FOUND);
+            return 0;
+
+        case -4:
+        case -5:
+            SET_ERROR_PARAMETER(error, TOX_ERR_FILE_SEEK_DENIED);
+            return 0;
+
+        case -6:
+            SET_ERROR_PARAMETER(error, TOX_ERR_FILE_SEEK_INVALID_POSITION);
+            return 0;
+
+        case -8:
+            SET_ERROR_PARAMETER(error, TOX_ERR_FILE_SEEK_SEND_FAILED);
+            return 0;
+    }
+
+    /* can't happen */
+    return 0;
+}
+
 void tox_callback_file_recv_control(Tox *tox, tox_file_recv_control_cb *function, void *user_data)
 {
     Messenger *m = tox;