1 files changed, 126 insertions, 0 deletions
diff --git a/gettext-tools/src/search-path.c b/gettext-tools/src/search-path.c
new file mode 100644
index 0000000..fdb61cb
--- /dev/null
+++ b/gettext-tools/src/search-path.c
@@ -0,0 +1,126 @@
+/* Routines for locating data files
+   Copyright (C) 2016 Free Software Foundation, Inc.
+
+   This file was written by Daiki Ueno <ueno@gnu.org>, 2016.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+/* Specification.  */
+#include "search-path.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "concat-filename.h"
+#include "xalloc.h"
+#include "xmemdup0.h"
+#include "xvasprintf.h"
+
+/* Find the standard search path for data files.  Returns a NULL
+   terminated list of strings.  */
+char **
+get_search_path (const char *name)
+{
+  char **result;
+  const char *gettextdatadir;
+  const char *gettextdatadirs;
+  char *base, *dir;
+  size_t n_dirs = 2;
+
+  gettextdatadirs = getenv ("GETTEXTDATADIRS");
+
+  /* If GETTEXTDATADIRS is not set, fallback to XDG_DATA_DIRS.  */
+  if (gettextdatadirs == NULL || *gettextdatadirs == '\0')
+    gettextdatadirs = getenv ("XDG_DATA_DIRS");
+
+  if (gettextdatadirs != NULL)
+    {
+      const char *start = gettextdatadirs;
+
+      /* Count the number of valid elements in GETTEXTDATADIRS.  */
+      while (*start != '\0')
+        {
+          char *end = strchrnul (start, ':');
+
+          /* Skip empty element.  */
+          if (start != end)
+            n_dirs++;
+
+          if (*end == '\0')
+            break;
+
+          start = end + 1;
+        }
+    }
+
+  result = XCALLOC (n_dirs + 1, char *);
+
+  n_dirs = 0;
+
+  gettextdatadir = getenv ("GETTEXTDATADIR");
+  if (gettextdatadir == NULL || gettextdatadir[0] == '\0')
+    gettextdatadir = GETTEXTDATADIR;
+
+  if (name == NULL)
+    dir = xstrdup (gettextdatadir);
+  else
+    dir = xconcatenated_filename (gettextdatadir, name, NULL);
+  result[n_dirs++] = dir;
+
+  if (gettextdatadirs != NULL)
+    {
+      const char *start = gettextdatadirs;
+
+      /* Count the number of valid elements in GETTEXTDATADIRS.  */
+      while (*start != '\0')
+        {
+          char *end = strchrnul (start, ':');
+
+          /* Skip empty element.  */
+          if (start != end)
+            {
+              base = xmemdup0 (start, end - start);
+              if (name == NULL)
+                dir = base;
+              else
+                {
+                  dir = xconcatenated_filename (base, name, NULL);
+                  free (base);
+                }
+              result[n_dirs++] = dir;
+            }
+
+          if (*end == '\0')
+            break;
+
+          start = end + 1;
+        }
+    }
+
+  base = xasprintf ("%s%s", gettextdatadir, PACKAGE_SUFFIX);
+  if (name == NULL)
+    dir = base;
+  else
+    {
+      dir = xconcatenated_filename (base, name, NULL);
+      free (base);
+    }
+  result[n_dirs++] = dir;
+
+  return result;
+}