From 99571d4f7208d7ee232c9e35100fa5ebeebfbd9c Mon Sep 17 00:00:00 2001
From: Tom Tromey <tom@tromey.com>
Date: Wed, 18 Oct 2017 16:05:22 -0600
Subject: [PATCH] constify some things

---
 lib-src/etags.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/lib-src/etags.c b/lib-src/etags.c
index e31aedb87c4..d092e43eb20 100644
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -402,10 +402,10 @@ static char *skip_name (char *);
 static char *savenstr (const char *, int);
 static char *savestr (const char *);
 static char *etags_getcwd (void);
-static char *relative_filename (char *, char *);
-static char *absolute_filename (char *, char *);
+static char *relative_filename (const char *, const char *);
+static char *absolute_filename (const char *, const char *);
 static char *absolute_dirname (char *, char *);
-static bool filename_is_absolute (char *f);
+static bool filename_is_absolute (const char *f);
 static void canonicalize_filename (char *);
 static char *etags_mktmp (void);
 static void linebuffer_init (linebuffer *);
@@ -1402,7 +1402,7 @@ main (int argc, char **argv)
  * Idea by Vladimir Alexiev <vladimir@cs.ualberta.ca> (1998)
  */
 static compressor *
-get_compressor_from_suffix (char *file, char **extptr)
+get_compressor_from_suffix (const char *file, const char **extptr)
 {
   compressor *compr;
   char *slash, *suffix;
@@ -1482,7 +1482,7 @@ get_language_from_interpreter (char *interpreter)
  * Return a language given the file name.
  */
 static language *
-get_language_from_filename (char *file, int case_sensitive)
+get_language_from_filename (const char *file, int case_sensitive)
 {
   language *lang;
   const char **name, **ext, *suffix;
@@ -1530,7 +1530,8 @@ process_file_name (char *file, language *lang)
   fdesc *fdp;
   compressor *compr;
   char *compressed_name, *uncompressed_name;
-  char *ext, *real_name UNINIT, *tmp_name UNINIT;
+  const char *ext;
+  char *real_name UNINIT, *tmp_name UNINIT;
   int retval;
 
   canonicalize_filename (file);
@@ -7086,9 +7087,10 @@ etags_mktmp (void)
 /* Return a newly allocated string containing the file name of FILE
    relative to the absolute directory DIR (which should end with a slash). */
 static char *
-relative_filename (char *file, char *dir)
+relative_filename (const char *file, const char *dir)
 {
-  char *fp, *dp, *afn, *res;
+  const char *fp, *dp;
+  char *afn, *res;
   int i;
 
   /* Find the common root of file and dir (with a trailing slash). */
@@ -7125,7 +7127,7 @@ relative_filename (char *file, char *dir)
 /* Return a newly allocated string containing the absolute file name
    of FILE given DIR (which should end with a slash). */
 static char *
-absolute_filename (char *file, char *dir)
+absolute_filename (const char *file, const char *dir)
 {
   char *slashp, *cp, *res;
 
@@ -7208,7 +7210,7 @@ absolute_dirname (char *file, char *dir)
 /* Whether the argument string is an absolute file name.  The argument
    string must have been canonicalized with canonicalize_filename. */
 static bool
-filename_is_absolute (char *fn)
+filename_is_absolute (const char *fn)
 {
   return (fn[0] == '/'
 #ifdef DOS_NT
-- 
2.39.5