[PATCH 4/4] helper: Move escape_underscores() here.

[Ben Pfaff]

An upcoming commit will introduce a new user in a different file.
---
 src/ui/gui/helper.c                  |   20 ++++++++++++++++++++
 src/ui/gui/helper.h                  |    1 +
 src/ui/gui/text-data-import-dialog.c |   19 -------------------
 3 files changed, 21 insertions(+), 19 deletions(-)

diff --git a/src/ui/gui/helper.c b/src/ui/gui/helper.c
index 04c9bfe..c5f7883 100644
--- a/src/ui/gui/helper.c
+++ b/src/ui/gui/helper.c
@@ -47,6 +47,26 @@
 
 #include <gettext.h>
 
+/* Returns a copy of IN with each underscore doubled.  The caller should free
+   the returned string (with free()) when it is no longer needed. */
+char *
+escape_underscores (const char *in)
+{
+  char *out = xmalloc (2 * strlen (in) + 1);
+  char *p;
+
+  p = out;
+  for (; *in != '\0'; in++)
+    {
+      if (*in == '_')
+        *p++ = '_';
+      *p++ = *in;
+    }
+  *p = '\0';
+
+  return out;
+}
+
 /* Formats a value according to VAR's print format and strips white space
    appropriately for VAR's type.  That is, if VAR is numeric, strips leading
    white space (because numbers are right-justified within their fields), and
diff --git a/src/ui/gui/helper.h b/src/ui/gui/helper.h
index d9fb3d6..be0b1ad 100644
--- a/src/ui/gui/helper.h
+++ b/src/ui/gui/helper.h
@@ -44,6 +44,7 @@ null_if_empty_param (const gchar *name, const gchar *nick,
   return param;
 }
 
+char *escape_underscores (const char *);
 
 gchar * value_to_text (union value v, const struct variable *);
 gchar * value_to_text__ (union value v, const struct fmt_spec *,
diff --git a/src/ui/gui/text-data-import-dialog.c 
b/src/ui/gui/text-data-import-dialog.c
index 10dc626..c4abeaa 100644
--- a/src/ui/gui/text-data-import-dialog.c
+++ b/src/ui/gui/text-data-import-dialog.c
@@ -213,7 +213,6 @@ static GtkTreeViewColumn *make_data_column (struct 
import_assistant *,
                                             gint column_idx);
 static GtkTreeView *create_data_tree_view (bool input, GtkContainer *parent,
                                            struct import_assistant *);
-static char *escape_underscores (const char *in);
 static void push_watch_cursor (struct import_assistant *);
 static void pop_watch_cursor (struct import_assistant *);
 
@@ -2088,24 +2087,6 @@ create_data_tree_view (bool input, GtkContainer *parent,
   return tree_view;
 }
 
-static char *
-escape_underscores (const char *in)
-{
-  char *out = xmalloc (2 * strlen (in) + 1);
-  char *p;
-
-  p = out;
-  for (; *in != '\0'; in++)
-    {
-      if (*in == '_')
-        *p++ = '_';
-      *p++ = *in;
-    }
-  *p = '\0';
-
-  return out;
-}
-
 /* Increments the "watch cursor" level, setting the cursor for
    the assistant window to a watch face to indicate to the user
    that the ongoing operation may take some time. */
-- 
1.7.2.5