[geany/geany-plugins] 62314d: Add Keep Unique Lines feature resolves #516

[Lukas Schwarz]

Branch:      refs/heads/master
Author:      Lukas Schwarz <lukas at localhost.localdomain>
Committer:   Lukas Schwarz <lukas at localhost.localdomain>
Date:        Wed, 12 Apr 2017 20:32:43 UTC
Commit:      62314d1117a6c6655f046650ee76e76f82e7f3a1
             https://github.com/geany/geany-plugins/commit/62314d1117a6c6655f046650ee76e76f82e7f3a1

Log Message:
-----------
Add Keep Unique Lines feature resolves #516


Modified Paths:
--------------
    lineoperations/README
    lineoperations/src/linefunctions.c
    lineoperations/src/linefunctions.h
    lineoperations/src/lineoperations.c

Modified: lineoperations/README
27 lines changed, 27 insertions(+), 0 deletions(-)
===================================================================
@@ -16,6 +16,7 @@ Features
 * Remove Duplicate Lines, sorted
 * Remove Duplicate Lines, ordered
 * Remove Unique Lines
+* Keep Unique Lines
 * Remove Empty Lines
 * Remove Whitespace Lines
 * Sort Lines Ascending
@@ -113,6 +114,32 @@ Removes all lines that appear only once.
     Line 1
     Line 2
 
+
+Keep Unique Lines
+-------------------
+
+Keep all lines that appear only once.
+
+  Example: Suppose a file has the following lines. (#comments added for 
+  clarity)
+
+  ::
+
+    Line 4
+    Line 1    #removed
+    Line 2    #removed
+    Line 3
+    Line 1    #removed
+    Line 2    #removed
+
+  The **Keep Unique Lines** will change the file into this:
+
+  ::
+
+    Line 4
+    Line 3
+
+
 Remove Empty Lines
 ------------------
 


Modified: lineoperations/src/linefunctions.c
44 lines changed, 44 insertions(+), 0 deletions(-)
===================================================================
@@ -159,6 +159,50 @@ rmunqln(gchar **lines, gint num_lines, gchar *new_file)
 }
 
 
+/* Keep Unique Lines */
+gint
+kpunqln(gchar **lines, gint num_lines, gchar *new_file)
+{
+	gchar *nf_end = new_file;   /* points to last char of new_file */
+	gint  i       = 0;          /* iterator */
+	gint  j       = 0;          /* iterator */
+	gboolean *to_remove = NULL; /* to 'mark' which lines to remove */
+	gint  changed = 0;          /* number of lines removed */
+
+
+	/* allocate and set *to_remove to all FALSE
+	 * to_remove[i] represents whether lines[i] should be removed */
+	to_remove = g_malloc(sizeof(gboolean) * num_lines);
+	for(i = 0; i < num_lines; i++)
+		to_remove[i] = FALSE;
+	
+	/* find all non unique lines and set them to TRUE (to be removed) */
+	for(i = 0; i < num_lines; i++)
+		/* make sure that the line is not already determined to be non unique */
+		if(!to_remove[i])
+			for(j = (i+1); j < num_lines; j++)
+				if(!to_remove[j] && strcmp(lines[i], lines[j]) == 0)
+				{
+					to_remove[i] = TRUE;
+					to_remove[j] = TRUE;
+				}
+	
+	/* copy **lines into 'new_file' if it is not FALSE(not duplicate) */
+	for(i = 0; i < num_lines; i++)
+		if(!to_remove[i])
+		{
+			changed++;     /* number of lines kept */
+			nf_end = g_stpcpy(nf_end, lines[i]);
+		}
+
+	/* free used memory */
+	g_free(to_remove);
+
+	/* return the number of lines deleted */
+	return -(num_lines - changed);
+}
+
+
 /* Remove Empty Lines */
 gint
 rmemtyln(ScintillaObject *sci, gint line_num, gint end_line_num)


Modified: lineoperations/src/linefunctions.h
5 lines changed, 5 insertions(+), 0 deletions(-)
===================================================================
@@ -45,6 +45,11 @@ gint
 rmunqln(gchar **lines, gint num_lines, gchar *new_file);
 
 
+/* Keep Unique Lines */
+gint
+kpunqln(gchar **lines, gint num_lines, gchar *new_file);
+
+
 /* Remove Empty Lines */
 gint
 rmemtyln(ScintillaObject *sci, gint line_num, gint end_line_num);


Modified: lineoperations/src/lineoperations.c
2 lines changed, 2 insertions(+), 0 deletions(-)
===================================================================
@@ -257,6 +257,8 @@ lo_init(GeanyPlugin *plugin, gpointer gdata)
 		  G_CALLBACK(action_indir_manip_item), (gpointer) rmdupln },
 		{ N_("Remove _Unique Lines"),
 		  G_CALLBACK(action_indir_manip_item), (gpointer) rmunqln },
+		{ N_("Keep _Unique Lines"),
+		  G_CALLBACK(action_indir_manip_item), (gpointer) kpunqln },
 		{ NULL },
 		{ N_("Remove _Empty Lines"),
 		  G_CALLBACK(action_sci_manip_item), (gpointer) rmemtyln },



--------------
This E-Mail was brought to you by github_commit_mail.py (Source: https://github.com/geany/infrastructure).