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+To: vim_dev@googlegroups.com
+Subject: Patch 7.4.560
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.4.560
+Problem: Memory leak using :wviminfo. Issue 296.
+Solution: Free memory when needed. (idea by Christian Brabandt)
+Files: src/ops.c
+
+
+*** ../vim-7.4.559/src/ops.c 2014-12-17 18:35:37.553795955 +0100
+--- src/ops.c 2014-12-17 20:59:49.722557613 +0100
+***************
+*** 5663,5668 ****
+--- 5663,5670 ----
+ int set_prev = FALSE;
+ char_u *str;
+ char_u **array = NULL;
++ int new_type;
++ colnr_T new_width;
+
+ /* We only get here (hopefully) if line[0] == '"' */
+ str = virp->vir_line + 1;
+***************
+*** 5695,5715 ****
+ limit = 100; /* Optimized for registers containing <= 100 lines */
+ if (do_it)
+ {
+ if (set_prev)
+ y_previous = y_current;
+! vim_free(y_current->y_array);
+! array = y_current->y_array =
+! (char_u **)alloc((unsigned)(limit * sizeof(char_u *)));
+ str = skipwhite(skiptowhite(str));
+ if (STRNCMP(str, "CHAR", 4) == 0)
+! y_current->y_type = MCHAR;
+ else if (STRNCMP(str, "BLOCK", 5) == 0)
+! y_current->y_type = MBLOCK;
+ else
+! y_current->y_type = MLINE;
+ /* get the block width; if it's missing we get a zero, which is OK */
+ str = skipwhite(skiptowhite(str));
+! y_current->y_width = getdigits(&str);
+ }
+
+ while (!(eof = viminfo_readline(virp))
+--- 5697,5721 ----
+ limit = 100; /* Optimized for registers containing <= 100 lines */
+ if (do_it)
+ {
++ /*
++ * Build the new register in array[].
++ * y_array is kept as-is until done.
++ * The "do_it" flag is reset when something is wrong, in which case
++ * array[] needs to be freed.
++ */
+ if (set_prev)
+ y_previous = y_current;
+! array = (char_u **)alloc((unsigned)(limit * sizeof(char_u *)));
+ str = skipwhite(skiptowhite(str));
+ if (STRNCMP(str, "CHAR", 4) == 0)
+! new_type = MCHAR;
+ else if (STRNCMP(str, "BLOCK", 5) == 0)
+! new_type = MBLOCK;
+ else
+! new_type = MLINE;
+ /* get the block width; if it's missing we get a zero, which is OK */
+ str = skipwhite(skiptowhite(str));
+! new_width = getdigits(&str);
+ }
+
+ while (!(eof = viminfo_readline(virp))
+***************
+*** 5717,5756 ****
+ {
+ if (do_it)
+ {
+! if (size >= limit)
+ {
+! y_current->y_array = (char_u **)
+ alloc((unsigned)(limit * 2 * sizeof(char_u *)));
+ for (i = 0; i < limit; i++)
+! y_current->y_array[i] = array[i];
+ vim_free(array);
+ limit *= 2;
+- array = y_current->y_array;
+ }
+ str = viminfo_readstring(virp, 1, TRUE);
+ if (str != NULL)
+ array[size++] = str;
+ else
+ do_it = FALSE;
+ }
+ }
+ if (do_it)
+ {
+ if (size == 0)
+ {
+- vim_free(array);
+ y_current->y_array = NULL;
+ }
+! else if (size < limit)
+ {
+ y_current->y_array =
+ (char_u **)alloc((unsigned)(size * sizeof(char_u *)));
+ for (i = 0; i < size; i++)
+! y_current->y_array[i] = array[i];
+! vim_free(array);
+ }
+- y_current->y_size = size;
+ }
+ return eof;
+ }
+
+--- 5723,5788 ----
+ {
+ if (do_it)
+ {
+! if (size == limit)
+ {
+! char_u **new_array = (char_u **)
+ alloc((unsigned)(limit * 2 * sizeof(char_u *)));
++
++ if (new_array == NULL)
++ {
++ do_it = FALSE;
++ break;
++ }
+ for (i = 0; i < limit; i++)
+! new_array[i] = array[i];
+ vim_free(array);
++ array = new_array;
+ limit *= 2;
+ }
+ str = viminfo_readstring(virp, 1, TRUE);
+ if (str != NULL)
+ array[size++] = str;
+ else
++ /* error, don't store the result */
+ do_it = FALSE;
+ }
+ }
+ if (do_it)
+ {
++ /* free y_array[] */
++ for (i = 0; i < y_current->y_size; i++)
++ vim_free(y_current->y_array[i]);
++ vim_free(y_current->y_array);
++
++ y_current->y_type = new_type;
++ y_current->y_width = new_width;
++ y_current->y_size = size;
+ if (size == 0)
+ {
+ y_current->y_array = NULL;
+ }
+! else
+ {
++ /* Move the lines from array[] to y_array[]. */
+ y_current->y_array =
+ (char_u **)alloc((unsigned)(size * sizeof(char_u *)));
+ for (i = 0; i < size; i++)
+! {
+! if (y_current->y_array == NULL)
+! vim_free(array[i]);
+! else
+! y_current->y_array[i] = array[i];
+! }
+ }
+ }
++ else
++ {
++ /* Free array[] if it was filled. */
++ for (i = 0; i < size; i++)
++ vim_free(array[i]);
++ }
++ vim_free(array);
++
+ return eof;
+ }
+
+*** ../vim-7.4.559/src/version.c 2014-12-17 18:35:37.553795955 +0100
+--- src/version.c 2014-12-17 18:56:33.810259558 +0100
+***************
+*** 743,744 ****
+--- 743,746 ----
+ { /* Add new patch number below this line */
++ /**/
++ 560,
+ /**/
+
+--
+hundred-and-one symptoms of being an internet addict:
+17. You turn on your intercom when leaving the room so you can hear if new
+ e-mail arrives.
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net \\\
+/// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\ an exciting new programming language -- http://www.Zimbu.org ///
+ \\\ help me help AIDS victims -- http://ICCF-Holland.org ///