Merge pull request #1688 from elmart/coverity-issues-1

coverity issues

src/nvim/ex_docmd.c

@@ -8543,7 +8543,9 @@ static void ex_loadview(exarg_T *eap)
 
   fname = get_view_file(*eap->arg);
   if (fname != NULL) {
-    do_source(fname, FALSE, DOSO_NONE);
+    if (do_source(fname, FALSE, DOSO_NONE) == FAIL) {
+      EMSG2(_(e_notopen), fname);
+    }
     free(fname);
   }
 }

src/nvim/fileio.c

@@ -2839,27 +2839,25 @@ buf_write (
            * Check if backup file already exists.
            */
           if (os_fileinfo((char *)backup, &file_info_new)) {
-            /*
-             * Check if backup file is same as original file.
-             * May happen when modname() gave the same file back (e.g. silly
-             * link). If we don't check here, we either ruin the file when
-             * copying or erase it after writing.
-             */
             if (os_fileinfo_id_equal(&file_info_new, &file_info_old)) {
+              /*
+               * Backup file is same as original file.
+               * May happen when modname() gave the same file back (e.g. silly
+               * link). If we don't check here, we either ruin the file when
+               * copying or erase it after writing.
+               */
               free(backup);
               backup = NULL;                    /* no backup file to delete */
-            }
+            } else if (!p_bk) {
-
+              /*
-            /*
+               * We are not going to keep the backup file, so don't
-             * If we are not going to keep the backup file, don't
+               * delete an existing one, and try to use another name instead.
-             * delete an existing one, try to use another name.
+               * Change one character, just before the extension.
-             * Change one character, just before the extension.
+               */
-             */
+              wp = backup + STRLEN(backup) - 1 - STRLEN(backup_ext);
-            if (!p_bk) {
+              if (wp < backup) {                /* empty file name ??? */
-              wp = backup + STRLEN(backup) - 1
-                   - STRLEN(backup_ext);
-              if (wp < backup)                  /* empty file name ??? */
                 wp = backup;
+              }
               *wp = 'z';
               while (*wp > 'a'
                      && os_fileinfo((char *)backup, &file_info_new)) {

src/nvim/ops.c

@@ -30,6 +30,7 @@
 #include "nvim/fold.h"
 #include "nvim/getchar.h"
 #include "nvim/indent.h"
+#include "nvim/log.h"
 #include "nvim/mark.h"
 #include "nvim/mbyte.h"
 #include "nvim/memline.h"
@@ -2641,7 +2642,10 @@ do_put (
 
   /* Autocommands may be executed when saving lines for undo, which may make
    * y_array invalid.  Start undo now to avoid that. */
-  u_save(curwin->w_cursor.lnum, curwin->w_cursor.lnum + 1);
+  if (u_save(curwin->w_cursor.lnum, curwin->w_cursor.lnum + 1) == FAIL) {
+    ELOG(_("Failed to save undo information"));
+    return;
+  }
 
   if (insert_string != NULL) {
     y_type = MCHAR;

src/nvim/undo.c

@@ -230,7 +230,7 @@ int u_save(linenr_T top, linenr_T bot)
   if (top > curbuf->b_ml.ml_line_count
       || top >= bot
       || bot > curbuf->b_ml.ml_line_count + 1)
-    return FALSE;       /* rely on caller to do error messages */
+    return FAIL;        /* rely on caller to do error messages */
 
   if (top + 2 == bot)
     u_saveline((linenr_T)(top + 1));