vim-patch:7.4.1841

Problem:    The code to reallocate the buffer used for quickfix is repeated.
Solution:   Move the code to a function. (Yegappan Lakshmanan, closes vim/vim#831)

2b2b8ae5ab

src/nvim/quickfix.c

@@ -171,6 +171,22 @@ qf_init (
 // Maximum number of bytes allowed per line while reading an errorfile.
 static const size_t LINE_MAXLEN = 4096;
 
+static char_u *qf_grow_linebuf(char_u **growbuf, size_t *growbufsiz,
+                               size_t newsz, size_t *allocsz)
+{
+  // If the line exceeds LINE_MAXLEN exclude the last
+  // byte since it's not a NL character.
+  *allocsz = newsz > LINE_MAXLEN ? LINE_MAXLEN - 1 : newsz;
+  if (*growbuf == NULL) {
+    *growbuf = xmalloc(*allocsz + 1);
+    *growbufsiz = *allocsz;
+  } else if (*allocsz > *growbufsiz) {
+    *growbuf = xrealloc(*growbuf, *allocsz + 1);
+    *growbufsiz = *allocsz;
+  }
+  return *growbuf;
+}
+
 /*
  * Read the errorfile "efile" into memory, line by line, building the error
  * list.
@@ -488,16 +504,7 @@ qf_init_ext (
             len = STRLEN(p_str);
 
           if (len > IOSIZE - 2) {
-            // If the line exceeds LINE_MAXLEN exclude the last byte since it's
-            // not a NL character.
-            linelen = len > LINE_MAXLEN ? LINE_MAXLEN - 1 : len;
-            if (growbuf == NULL) {
-              growbuf = xmalloc(linelen + 1);
-            } else if (linelen > growbufsiz) {
-              growbuf = xrealloc(growbuf, linelen + 1);
-            }
-            growbufsiz = linelen;
-            linebuf = growbuf;
+            linebuf = qf_grow_linebuf(&growbuf, &growbufsiz, len, &linelen);
           } else {
             linebuf = IObuff;
             linelen = len;
@@ -520,18 +527,7 @@ qf_init_ext (
 
           len = STRLEN(p_li->li_tv.vval.v_string);
           if (len > IOSIZE - 2) {
-            linelen = len;
-            if (linelen > LINE_MAXLEN) {
-              linelen = LINE_MAXLEN - 1;
-            }
-            if (growbuf == NULL) {
-              growbuf = xmalloc(linelen + 1);
-              growbufsiz = linelen;
-            } else if (linelen > growbufsiz) {
-              growbuf = xrealloc(growbuf, linelen + 1);
-              growbufsiz = linelen;
-            }
-            linebuf = growbuf;
+            linebuf = qf_grow_linebuf(&growbuf, &growbufsiz, len, &linelen);
           } else {
             linebuf = IObuff;
             linelen = len;
@@ -548,17 +544,7 @@ qf_init_ext (
         p_buf = ml_get_buf(buf, buflnum++, false);
         linelen = STRLEN(p_buf);
         if (linelen > IOSIZE - 2) {
-          if (growbuf == NULL) {
-            growbuf = xmalloc(linelen + 1);
-            growbufsiz = linelen;
-          } else if (linelen > growbufsiz) {
-            if (linelen > LINE_MAXLEN) {
-              linelen = LINE_MAXLEN - 1;
-            }
-            growbuf = xrealloc(growbuf, linelen + 1);
-            growbufsiz = linelen;
-          }
-          linebuf = growbuf;
+            linebuf = qf_grow_linebuf(&growbuf, &growbufsiz, len, &linelen);
         } else {
           linebuf = IObuff;
         }

src/nvim/testdir/test_quickfix.vim

@@ -682,14 +682,14 @@ endfunc
 
 " Tests for the setqflist() and setloclist() functions
 function SetXlistTests(cchar, bnum)
+  let Xwindow = a:cchar . 'window'
+  let Xnext = a:cchar . 'next'
   if a:cchar == 'c'
     let Xsetlist = function('setqflist')
     let Xgetlist = function('getqflist')
-    let Xnext = 'cnext'
   else
     let Xsetlist = function('setloclist', [0])
     let Xgetlist = function('getloclist', [0])
-    let Xnext = 'lnext'
   endif
 
   call Xsetlist([{'bufnr': a:bnum, 'lnum': 1},
@@ -705,6 +705,15 @@ function SetXlistTests(cchar, bnum)
   exe Xnext
   call assert_equal(3, line('.'))
 
+  " Appending entries to the list should not change the cursor position
+  " in the quickfix window
+  exe Xwindow
+  1
+  call Xsetlist([{'bufnr': a:bnum, 'lnum': 4},
+	      \  {'bufnr': a:bnum, 'lnum': 5}], 'a')
+  call assert_equal(1, line('.'))
+  close
+
   call Xsetlist([{'bufnr': a:bnum, 'lnum': 3},
 	      \  {'bufnr': a:bnum, 'lnum': 4},
 	      \  {'bufnr': a:bnum, 'lnum': 5}], 'r')

src/nvim/version.c

@@ -599,7 +599,7 @@ static int included_patches[] = {
   // 1844,
   // 1843 NA
   1842,
-  // 1841,
+  1841,
   1840,
   // 1839,
   // 1838,