remove short-lived CURL_WRITEFUNC_OUT_OF_MEMORY

docs/libcurl/curl_easy_setopt.3

@@ -160,11 +160,6 @@ From 7.18.0, the function can return CURL_WRITEFUNC_PAUSE which then will
 cause writing to this connection to become paused. See
 \fIcurl_easy_pause(3)\fP for further details.
 
-From 7.22.1, the function can return CURL_WRITEFUNC_OUT_OF_MEMORY to indicate
-libcurl that an attempt to dynamically allocate memory from within the write
-callback itself has failed. This will abort the transfer and make libcurl
-return CURLE_OUT_OF_MEMORY.
-
 This function may be called with zero bytes data if the transferred file is
 empty.
 

docs/libcurl/symbols-in-versions

@@ -685,5 +685,4 @@ CURL_VERSION_SPNEGO             7.10.8
 CURL_VERSION_SSL                7.10
 CURL_VERSION_SSPI               7.13.2
 CURL_VERSION_TLSAUTH_SRP        7.21.4
-CURL_WRITEFUNC_OUT_OF_MEMORY    7.22.1
 CURL_WRITEFUNC_PAUSE            7.18.0

include/curl/curl.h

@@ -191,11 +191,6 @@ typedef int (*curl_progress_callback)(void *clientp,
    will signal libcurl to pause receiving on the current transfer. */
 #define CURL_WRITEFUNC_PAUSE 0x10000001
 
-/* If the write callback itself allocates memory dynamically and this fails
-   due to an out of memory condition, returning CURL_WRITEFUNC_OUT_OF_MEMORY
-   is the proper way to tell libcurl of this condition. */
-#define CURL_WRITEFUNC_OUT_OF_MEMORY 0x10000002
-
 typedef size_t (*curl_write_callback)(char *buffer,
                                       size_t size,
                                       size_t nitems,

lib/ftplistparser.c

@@ -354,8 +354,6 @@ static CURLcode ftp_pl_insert_finfo(struct connectdata *conn,
   return CURLE_OK;
 }
 
-/* Curl_ftp_parselist is a write callback function */
-
 size_t Curl_ftp_parselist(char *buffer, size_t size, size_t nmemb,
                           void *connptr)
 {
@@ -367,10 +365,6 @@ size_t Curl_ftp_parselist(char *buffer, size_t size, size_t nmemb,
   unsigned long i = 0;
   CURLcode rc;
 
-  if(bufflen >= CURL_WRITEFUNC_PAUSE)
-    /* CURL_WRITEFUNC_PAUSE limits input size */
-    return CURL_WRITEFUNC_OUT_OF_MEMORY;
-
   if(parser->error) { /* error in previous call */
     /* scenario:
      * 1. call => OK..
@@ -378,9 +372,6 @@ size_t Curl_ftp_parselist(char *buffer, size_t size, size_t nmemb,
      * 3. (last) call => is skipped RIGHT HERE and the error is hadled later
      *    in wc_statemach()
      */
-    if(parser->error == CURLE_OUT_OF_MEMORY)
-      return CURL_WRITEFUNC_OUT_OF_MEMORY;
-
     return bufflen;
   }
 
@@ -397,12 +388,12 @@ size_t Curl_ftp_parselist(char *buffer, size_t size, size_t nmemb,
       parser->file_data = Curl_fileinfo_alloc();
       if(!parser->file_data) {
         parser->error = CURLE_OUT_OF_MEMORY;
-        return CURL_WRITEFUNC_OUT_OF_MEMORY;
+        return bufflen;
       }
       parser->file_data->b_data = malloc(FTP_BUFFER_ALLOCSIZE);
       if(!parser->file_data->b_data) {
         PL_ERROR(conn, CURLE_OUT_OF_MEMORY);
-        return CURL_WRITEFUNC_OUT_OF_MEMORY;
+        return bufflen;
       }
       parser->file_data->b_size = FTP_BUFFER_ALLOCSIZE;
       parser->item_offset = 0;
@@ -425,7 +416,7 @@ size_t Curl_ftp_parselist(char *buffer, size_t size, size_t nmemb,
         parser->file_data = NULL;
         parser->error = CURLE_OUT_OF_MEMORY;
         PL_ERROR(conn, CURLE_OUT_OF_MEMORY);
-        return CURL_WRITEFUNC_OUT_OF_MEMORY;
+        return bufflen;
       }
     }
 

lib/rtsp.c

@@ -725,11 +725,6 @@ CURLcode rtp_client_write(struct connectdata *conn, char *ptr, size_t len)
   writeit = data->set.fwrite_rtp?data->set.fwrite_rtp:data->set.fwrite_func;
   wrote = writeit(ptr, 1, len, data->set.rtp_out);
 
-  if(CURL_WRITEFUNC_OUT_OF_MEMORY == wrote) {
-    failf (data, "Out of memory writing RTP data");
-    return CURLE_OUT_OF_MEMORY;
-  }
-
   if(CURL_WRITEFUNC_PAUSE == wrote) {
     failf (data, "Cannot pause RTP");
     return CURLE_WRITE_ERROR;

lib/sendf.c

@@ -459,11 +459,6 @@ CURLcode Curl_client_write(struct connectdata *conn,
       wrote = len;
     }
 
-    if(CURL_WRITEFUNC_OUT_OF_MEMORY == wrote) {
-      failf(data, "Out of memory writing body");
-      return CURLE_OUT_OF_MEMORY;
-    }
-
     if(CURL_WRITEFUNC_PAUSE == wrote)
       return pausewrite(data, type, ptr, len);
 
@@ -486,12 +481,6 @@ CURLcode Curl_client_write(struct connectdata *conn,
        regardless of the ftp transfer mode (ASCII/Image) */
 
     wrote = writeit(ptr, 1, len, data->set.writeheader);
-
-    if(CURL_WRITEFUNC_OUT_OF_MEMORY == wrote) {
-      failf(data, "Out of memory writing header");
-      return CURLE_OUT_OF_MEMORY;
-    }
-
     if(CURL_WRITEFUNC_PAUSE == wrote)
       /* here we pass in the HEADER bit only since if this was body as well
          then it was passed already and clearly that didn't trigger the pause,

src/tool_cb_hdr.c

@@ -47,10 +47,6 @@ size_t tool_header_cb(void *ptr, size_t size, size_t nmemb, void *userdata)
   const size_t cb = size * nmemb;
   const char *end = (char*)ptr + cb;
 
-  if(cb >= CURL_WRITEFUNC_PAUSE)
-    /* CURL_WRITEFUNC_PAUSE limits input size */
-    return CURL_WRITEFUNC_OUT_OF_MEMORY;
-
   if(cb > 20 && checkprefix("Content-disposition:", str)) {
     const char *p = str + 20;
 
@@ -78,13 +74,12 @@ size_t tool_header_cb(void *ptr, size_t size, size_t nmemb, void *userdata)
       */
       len = (ssize_t)cb - (p - str);
       filename = parse_filename(p, len);
+      /* TODO: OOM handling - return (size_t)-1 ? */
       if(filename) {
         outs->filename = filename;
         outs->alloc_filename = TRUE;
         break;
       }
-      else
-        return CURL_WRITEFUNC_OUT_OF_MEMORY;
     }
   }
 

src/tool_cb_wrt.c

@@ -51,10 +51,6 @@ size_t tool_write_cb(void *buffer, size_t sz, size_t nmemb, void *userdata)
    */
   const size_t err_rc = (sz * nmemb) ? 0 : 1;
 
-  if(sz * nmemb >= CURL_WRITEFUNC_PAUSE)
-    /* CURL_WRITEFUNC_PAUSE limits input size */
-    return CURL_WRITEFUNC_OUT_OF_MEMORY;
-
   if(!out->stream) {
     out->bytes = 0; /* nothing written yet */
     if(!out->filename) {