patch 8.1.1062: quickfix code is repeated

Problem:    Quickfix code is repeated.
Solution:   Define FOR_ALL_QFL_ITEMS(). Move some code to separate functions.
            (Yegappan Lakshmanan, closes #4166)

src/quickfix.c

@@ -195,6 +195,11 @@ static qf_info_T *ll_get_or_alloc_list(win_T *);
  */
 #define GET_LOC_LIST(wp) (IS_LL_WINDOW(wp) ? wp->w_llist_ref : wp->w_llist)
 
+#define FOR_ALL_QFL_ITEMS(qfl, qfp, i) \
+		    for (i = 0, qfp = qfl->qf_start; \
+			    !got_int && i < qfl->qf_count && qfp != NULL; \
+			    ++i, qfp = qfp->qf_next)
+
 /*
  * Looking up a buffer can be slow if there are many.  Remember the last one
  * to make this a lot faster if there are multiple matches in the same file.
@@ -2148,9 +2153,7 @@ copy_loclist_entries(qf_list_T *from_qfl, qf_list_T *to_qfl)
     qfline_T    *prevp;
 
     // copy all the location entries in this list
-    for (i = 0, from_qfp = from_qfl->qf_start;
+    FOR_ALL_QFL_ITEMS(from_qfl, from_qfp, i)
-	    i < from_qfl->qf_count && from_qfp != NULL;
-	    ++i, from_qfp = from_qfp->qf_next)
     {
 	if (qf_add_entry(to_qfl,
 		    NULL,
@@ -2544,9 +2547,8 @@ is_qf_entry_present(qf_list_T *qfl, qfline_T *qf_ptr)
     int		i;
 
     // Search for the entry in the current list
-    for (i = 0, qfp = qfl->qf_start; i < qfl->qf_count;
+    FOR_ALL_QFL_ITEMS(qfl, qfp, i)
-	    ++i, qfp = qfp->qf_next)
+	if (qfp == qf_ptr)
-	if (qfp == NULL || qfp == qf_ptr)
 	    break;
 
     if (i == qfl->qf_count) // Entry is not found
@@ -3792,9 +3794,7 @@ qf_mark_adjust(
 	qf_list_T	*qfl = qf_get_list(qi, idx);
 
 	if (!qf_list_empty(qfl))
-	    for (i = 0, qfp = qfl->qf_start;
+	    FOR_ALL_QFL_ITEMS(qfl, qfp, i)
-			i < qfl->qf_count && qfp != NULL;
-			++i, qfp = qfp->qf_next)
 		if (qfp->qf_fnum == curbuf->b_fnum)
 		{
 		    found_one = TRUE;
@@ -4819,8 +4819,7 @@ qf_get_size(exarg_T *eap)
     }
 
     qfl = qf_get_curlist(qi);
-    for (i = 0, qfp = qfl->qf_start; i < qfl->qf_count && qfp != NULL;
+    FOR_ALL_QFL_ITEMS(qfl, qfp, i)
-	    ++i, qfp = qfp->qf_next)
     {
 	if (qfp->qf_valid)
 	{
@@ -5055,6 +5054,24 @@ ex_cnext(exarg_T *eap)
     qf_jump(qi, dir, errornr, eap->forceit);
 }
 
+/*
+ * Return the autocmd name for the :cfile Ex commands
+ */
+    static char_u *
+cfile_get_auname(cmdidx_T cmdidx)
+{
+    switch (cmdidx)
+    {
+	case CMD_cfile:	    return (char_u *)"cfile";
+	case CMD_cgetfile:  return (char_u *)"cgetfile";
+	case CMD_caddfile:  return (char_u *)"caddfile";
+	case CMD_lfile:	    return (char_u *)"lfile";
+	case CMD_lgetfile:  return (char_u *)"lgetfile";
+	case CMD_laddfile:  return (char_u *)"laddfile";
+	default:	    return NULL;
+    }
+}
+
 /*
  * ":cfile"/":cgetfile"/":caddfile" commands.
  * ":lfile"/":lgetfile"/":laddfile" commands.
@@ -5069,18 +5086,10 @@ ex_cfile(exarg_T *eap)
     int_u	save_qfid = 0;		// init for gcc
     int		res;
 
-    switch (eap->cmdidx)
+    au_name = cfile_get_auname(eap->cmdidx);
-    {
-	case CMD_cfile:	    au_name = (char_u *)"cfile"; break;
-	case CMD_cgetfile:  au_name = (char_u *)"cgetfile"; break;
-	case CMD_caddfile:  au_name = (char_u *)"caddfile"; break;
-	case CMD_lfile:	    au_name = (char_u *)"lfile"; break;
-	case CMD_lgetfile:  au_name = (char_u *)"lgetfile"; break;
-	case CMD_laddfile:  au_name = (char_u *)"laddfile"; break;
-	default: break;
-    }
     if (au_name != NULL)
 	apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name, NULL, FALSE, curbuf);
+
     enc = (*curbuf->b_p_menc != NUL) ? curbuf->b_p_menc : p_menc;
 #ifdef FEAT_BROWSE
     if (cmdmod.browse)
@@ -5832,44 +5841,16 @@ unload_dummy_buffer(buf_T *buf, char_u *dirname_start)
 
 #if defined(FEAT_EVAL) || defined(PROTO)
 /*
- * Add each quickfix error to list "list" as a dictionary.
+ * Copy the specified quickfix entry items into a new dict and appened the dict
- * If qf_idx is -1, use the current list. Otherwise, use the specified list.
+ * to 'list'.  Returns OK on success.
  */
-    int
+    static int
-get_errorlist(qf_info_T *qi_arg, win_T *wp, int qf_idx, list_T *list)
+get_qfline_items(qfline_T *qfp, list_T *list)
 {
-    qf_info_T	*qi = qi_arg;
+    int		bufnum;
-    qf_list_T	*qfl;
     dict_T	*dict;
     char_u	buf[2];
-    qfline_T	*qfp;
-    int		i;
-    int		bufnum;
 
-    if (qi == NULL)
-    {
-	qi = &ql_info;
-	if (wp != NULL)
-	{
-	    qi = GET_LOC_LIST(wp);
-	    if (qi == NULL)
-		return FAIL;
-	}
-    }
-
-    if (qf_idx == INVALID_QFIDX)
-	qf_idx = qi->qf_curlist;
-
-    if (qf_idx >= qi->qf_listcount)
-	return FAIL;
-
-    qfl = qf_get_list(qi, qf_idx);
-    if (qf_list_empty(qfl))
-	return FAIL;
-
-    qfp = qfl->qf_start;
-    for (i = 1; !got_int && i <= qfl->qf_count; ++i)
-    {
     // Handle entries with a non-existing buffer number.
     bufnum = qfp->qf_fnum;
     if (bufnum != 0 && (buflist_findnr(bufnum) == NULL))
@@ -5894,10 +5875,48 @@ get_errorlist(qf_info_T *qi_arg, win_T *wp, int qf_idx, list_T *list)
 	    || dict_add_number(dict, "valid", (long)qfp->qf_valid) == FAIL)
 	return FAIL;
 
-	qfp = qfp->qf_next;
+    return OK;
-	if (qfp == NULL)
-	    break;
 }
+
+/*
+ * Add each quickfix error to list "list" as a dictionary.
+ * If qf_idx is -1, use the current list. Otherwise, use the specified list.
+ */
+    int
+get_errorlist(qf_info_T *qi_arg, win_T *wp, int qf_idx, list_T *list)
+{
+    qf_info_T	*qi = qi_arg;
+    qf_list_T	*qfl;
+    qfline_T	*qfp;
+    int		i;
+
+    if (qi == NULL)
+    {
+	qi = &ql_info;
+	if (wp != NULL)
+	{
+	    qi = GET_LOC_LIST(wp);
+	    if (qi == NULL)
+		return FAIL;
+	}
+    }
+
+    if (qf_idx == INVALID_QFIDX)
+	qf_idx = qi->qf_curlist;
+
+    if (qf_idx >= qi->qf_listcount)
+	return FAIL;
+
+    qfl = qf_get_list(qi, qf_idx);
+    if (qf_list_empty(qfl))
+	return FAIL;
+
+    FOR_ALL_QFL_ITEMS(qfl, qfp, i)
+    {
+	if (get_qfline_items(qfp, list) == FAIL)
+	    return FAIL;
+    }
+
     return OK;
 }
 
@@ -6841,6 +6860,74 @@ set_ref_in_quickfix(int copyID)
 }
 #endif
 
+/*
+ * Return the autocmd name for the :cbuffer Ex commands
+ */
+    static char_u *
+cbuffer_get_auname(cmdidx_T cmdidx)
+{
+    switch (cmdidx)
+    {
+	case CMD_cbuffer:	return (char_u *)"cbuffer";
+	case CMD_cgetbuffer:	return (char_u *)"cgetbuffer";
+	case CMD_caddbuffer:	return (char_u *)"caddbuffer";
+	case CMD_lbuffer:	return (char_u *)"lbuffer";
+	case CMD_lgetbuffer:	return (char_u *)"lgetbuffer";
+	case CMD_laddbuffer:	return (char_u *)"laddbuffer";
+	default:		return NULL;
+    }
+}
+
+/*
+ * Process and validate the arguments passed to the :cbuffer, :caddbuffer,
+ * :cgetbuffer, :lbuffer, :laddbuffer, :lgetbuffer Ex commands.
+ */
+    static int
+cbuffer_process_args(
+	exarg_T		*eap,
+	buf_T		**bufp,
+	linenr_T	*line1,
+	linenr_T	*line2)
+{
+    buf_T	*buf = NULL;
+
+    if (*eap->arg == NUL)
+	buf = curbuf;
+    else if (*skipwhite(skipdigits(eap->arg)) == NUL)
+	buf = buflist_findnr(atoi((char *)eap->arg));
+
+    if (buf == NULL)
+    {
+	emsg(_(e_invarg));
+	return FAIL;
+    }
+
+    if (buf->b_ml.ml_mfp == NULL)
+    {
+	emsg(_("E681: Buffer is not loaded"));
+	return FAIL;
+    }
+
+    if (eap->addr_count == 0)
+    {
+	eap->line1 = 1;
+	eap->line2 = buf->b_ml.ml_line_count;
+    }
+
+    if (eap->line1 < 1 || eap->line1 > buf->b_ml.ml_line_count
+	    || eap->line2 < 1 || eap->line2 > buf->b_ml.ml_line_count)
+    {
+	emsg(_(e_invrange));
+	return FAIL;
+    }
+
+    *line1 = eap->line1;
+    *line2 = eap->line2;
+    *bufp = buf;
+
+    return OK;
+}
+
 /*
  * ":[range]cbuffer [bufnr]" command.
  * ":[range]caddbuffer [bufnr]" command.
@@ -6858,17 +6945,11 @@ ex_cbuffer(exarg_T *eap)
     int		res;
     int_u	save_qfid;
     win_T	*wp = NULL;
+    char_u	*qf_title;
+    linenr_T	line1;
+    linenr_T	line2;
 
-    switch (eap->cmdidx)
+    au_name = cbuffer_get_auname(eap->cmdidx);
-    {
-	case CMD_cbuffer:	au_name = (char_u *)"cbuffer"; break;
-	case CMD_cgetbuffer:	au_name = (char_u *)"cgetbuffer"; break;
-	case CMD_caddbuffer:	au_name = (char_u *)"caddbuffer"; break;
-	case CMD_lbuffer:	au_name = (char_u *)"lbuffer"; break;
-	case CMD_lgetbuffer:	au_name = (char_u *)"lgetbuffer"; break;
-	case CMD_laddbuffer:	au_name = (char_u *)"laddbuffer"; break;
-	default: break;
-    }
     if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
 					curbuf->b_fname, TRUE, curbuf))
     {
@@ -6887,27 +6968,10 @@ ex_cbuffer(exarg_T *eap)
 	wp = curwin;
     }
 
-    if (*eap->arg == NUL)
+    if (cbuffer_process_args(eap, &buf, &line1, &line2) == FAIL)
-	buf = curbuf;
+	return;
-    else if (*skipwhite(skipdigits(eap->arg)) == NUL)
+
-	buf = buflist_findnr(atoi((char *)eap->arg));
+    qf_title = qf_cmdtitle(*eap->cmdlinep);
-    if (buf == NULL)
-	emsg(_(e_invarg));
-    else if (buf->b_ml.ml_mfp == NULL)
-	emsg(_("E681: Buffer is not loaded"));
-    else
-    {
-	if (eap->addr_count == 0)
-	{
-	    eap->line1 = 1;
-	    eap->line2 = buf->b_ml.ml_line_count;
-	}
-	if (eap->line1 < 1 || eap->line1 > buf->b_ml.ml_line_count
-		|| eap->line2 < 1 || eap->line2 > buf->b_ml.ml_line_count)
-	    emsg(_(e_invrange));
-	else
-	{
-	    char_u *qf_title = qf_cmdtitle(*eap->cmdlinep);
 
     if (buf->b_sfname)
     {
@@ -6921,7 +6985,7 @@ ex_cbuffer(exarg_T *eap)
     res = qf_init_ext(qi, qi->qf_curlist, NULL, buf, NULL, p_efm,
 	    (eap->cmdidx != CMD_caddbuffer
 	     && eap->cmdidx != CMD_laddbuffer),
-						   eap->line1, eap->line2,
+	    line1, line2,
 	    qf_title, NULL);
     if (qf_stack_empty(qi))
     {
@@ -6938,8 +7002,8 @@ ex_cbuffer(exarg_T *eap)
     {
 	buf_T *curbuf_old = curbuf;
 
-		apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name,
+	apply_autocmds(EVENT_QUICKFIXCMDPOST, au_name, curbuf->b_fname,
-						curbuf->b_fname, TRUE, curbuf);
+								TRUE, curbuf);
 	if (curbuf != curbuf_old)
 	    // Autocommands changed buffer, don't jump now, "qi" may
 	    // be invalid.
@@ -6955,10 +7019,26 @@ ex_cbuffer(exarg_T *eap)
 
     decr_quickfix_busy();
 }
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+/*
+ * Return the autocmd name for the :cexpr Ex commands.
+ */
+    static char_u *
+cexpr_get_auname(cmdidx_T cmdidx)
+{
+    switch (cmdidx)
+    {
+	case CMD_cexpr:	    return (char_u *)"cexpr";
+	case CMD_cgetexpr:  return (char_u *)"cgetexpr";
+	case CMD_caddexpr:  return (char_u *)"caddexpr";
+	case CMD_lexpr:	    return (char_u *)"lexpr";
+	case CMD_lgetexpr:  return (char_u *)"lgetexpr";
+	case CMD_laddexpr:  return (char_u *)"laddexpr";
+	default:	    return NULL;
     }
 }
 
-#if defined(FEAT_EVAL) || defined(PROTO)
 /*
  * ":cexpr {expr}", ":cgetexpr {expr}", ":caddexpr {expr}" command.
  * ":lexpr {expr}", ":lgetexpr {expr}", ":laddexpr {expr}" command.
@@ -6973,16 +7053,7 @@ ex_cexpr(exarg_T *eap)
     int_u	save_qfid;
     win_T	*wp = NULL;
 
-    switch (eap->cmdidx)
+    au_name = cexpr_get_auname(eap->cmdidx);
-    {
-	case CMD_cexpr:	    au_name = (char_u *)"cexpr"; break;
-	case CMD_cgetexpr:  au_name = (char_u *)"cgetexpr"; break;
-	case CMD_caddexpr:  au_name = (char_u *)"caddexpr"; break;
-	case CMD_lexpr:	    au_name = (char_u *)"lexpr"; break;
-	case CMD_lgetexpr:  au_name = (char_u *)"lgetexpr"; break;
-	case CMD_laddexpr:  au_name = (char_u *)"laddexpr"; break;
-	default: break;
-    }
     if (au_name != NULL && apply_autocmds(EVENT_QUICKFIXCMDPRE, au_name,
 					       curbuf->b_fname, TRUE, curbuf))
     {
@@ -7257,10 +7328,6 @@ ex_helpgrep(exarg_T *eap)
 #endif
     }
 
-    // Make 'cpoptions' empty, the 'l' flag should not be used here.
-    save_cpo = p_cpo;
-    p_cpo = empty_option;
-
     if (is_loclist_cmd(eap->cmdidx))
     {
 	qi = hgr_get_ll(&new_qi);
@@ -7268,6 +7335,10 @@ ex_helpgrep(exarg_T *eap)
 	    return;
     }
 
+    // Make 'cpoptions' empty, the 'l' flag should not be used here.
+    save_cpo = p_cpo;
+    p_cpo = empty_option;
+
     incr_quickfix_busy();
 
 #ifdef FEAT_MULTI_LANG

src/version.c

@@ -775,6 +775,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1062,
 /**/
     1061,
 /**/