Curl_range: commonize FTP and FILE range handling

Closes #2205

1 files changed, 2 insertions, 60 deletions

diff --git a/lib/file.c b/lib/file.c
index 0bbc0e180..ac611e6a1 100644
--- a/lib/file.c
+++ b/lib/file.c
@@ -61,6 +61,7 @@
 #include "url.h"
 #include "parsedate.h" /* for the week day and month names */
 #include "warnless.h"
+#include "curl_range.h"
 /* The last 3 #include files should be in this order */
 #include "curl_printf.h"
 #include "curl_memory.h"
@@ -125,65 +126,6 @@ static CURLcode file_setup_connection(struct connectdata *conn)
   return CURLE_OK;
 }
 
- /*
-  Check if this is a range download, and if so, set the internal variables
-  properly. This code is copied from the FTP implementation and might as
-  well be factored out.
- */
-static CURLcode file_range(struct connectdata *conn)
-{
-  curl_off_t from, to;
-  curl_off_t totalsize = -1;
-  char *ptr;
-  char *ptr2;
-  struct Curl_easy *data = conn->data;
-
-  if(data->state.use_range && data->state.range) {
-    CURLofft from_t;
-    CURLofft to_t;
-    from_t = curlx_strtoofft(data->state.range, &ptr, 0, &from);
-    if(from_t == CURL_OFFT_FLOW)
-      return CURLE_RANGE_ERROR;
-    while(*ptr && (ISSPACE(*ptr) || (*ptr == '-')))
-      ptr++;
-    to_t = curlx_strtoofft(ptr, &ptr2, 0, &to);
-    if(to_t == CURL_OFFT_FLOW)
-      return CURLE_RANGE_ERROR;
-    if((to_t == CURL_OFFT_INVAL) && !from_t) {
-      /* X - */
-      data->state.resume_from = from;
-      DEBUGF(infof(data, "RANGE %" CURL_FORMAT_CURL_OFF_T " to end of file\n",
-                   from));
-    }
-    else if((from_t == CURL_OFFT_INVAL) && !to_t) {
-      /* -Y */
-      data->req.maxdownload = to;
-      data->state.resume_from = -to;
-      DEBUGF(infof(data, "RANGE the last %" CURL_FORMAT_CURL_OFF_T " bytes\n",
-                   to));
-    }
-    else {
-      /* X-Y */
-      totalsize = to-from;
-      if(totalsize == CURL_OFF_T_MAX)
-        /* this is too big to increase, so bail out */
-        return CURLE_RANGE_ERROR;
-      data->req.maxdownload = totalsize + 1; /* include last byte */
-      data->state.resume_from = from;
-      DEBUGF(infof(data, "RANGE from %" CURL_FORMAT_CURL_OFF_T
-                   " getting %" CURL_FORMAT_CURL_OFF_T " bytes\n",
-                   from, data->req.maxdownload));
-    }
-    DEBUGF(infof(data, "range-download from %" CURL_FORMAT_CURL_OFF_T
-                 " to %" CURL_FORMAT_CURL_OFF_T ", totally %"
-                 CURL_FORMAT_CURL_OFF_T " bytes\n",
-                 from, to, data->req.maxdownload));
-  }
-  else
-    data->req.maxdownload = -1;
-  return CURLE_OK;
-}
-
 /*
  * file_connect() gets called from Curl_protocol_connect() to allow us to
  * do protocol-specific actions at connect-time.  We emulate a
@@ -514,7 +456,7 @@ static CURLcode file_do(struct connectdata *conn, bool *done)
   }
 
   /* Check whether file range has been specified */
-  file_range(conn);
+  Curl_range(conn);
 
   /* Adjust the start offset in case we want to get the N last bytes
    * of the stream iff the filesize could be determined */