Fix various const-correctness issues

Spotted when temporarily compiling with -Wwrite-strings. This only goes
a small way towards making the code base -Wwrite-strings–clean. It
introduces no functional changes, and fixes no bugs.

Signed-off-by: Philip Withnall <withnall@endlessm.com>
Reviewed-by: nobody

gio/gdbusdaemon.c

@@ -204,7 +204,7 @@ name_lookup (GDBusDaemon *daemon, const char *str)
 }
 
 static gboolean
-is_key (const char *key_start, const char *key_end, char *value)
+is_key (const char *key_start, const char *key_end, const char *value)
 {
   gsize len = strlen (value);
 
@@ -1463,7 +1463,7 @@ filter_function (GDBusConnection *connection,
 		 gpointer         user_data)
 {
   Client *client = user_data;
-  char *types[] = {"invalid", "method_call", "method_return", "error", "signal" };
+  const char *types[] = {"invalid", "method_call", "method_return", "error", "signal" };
 
   if (0)
     g_printerr ("%s%s %s %d(%d) sender: %s destination: %s %s %s.%s\n",

gio/tests/file.c

@@ -153,9 +153,9 @@ typedef struct
   gint monitor_created;
   gint monitor_deleted;
   gint monitor_changed;
-  gchar *monitor_path;
+  const gchar *monitor_path;
   gint pos;
-  gchar *data;
+  const gchar *data;
   gchar *buffer;
   guint timeout;
 } CreateDeleteData;

gio/tests/fileattributematcher.c

@@ -3,7 +3,7 @@
 static void
 test_exact (void)
 {
-  char *exact_matches[] = {
+  const char *exact_matches[] = {
     "*",
     "a::*",
     "a::*,b::*",
@@ -29,8 +29,8 @@ static void
 test_equality (void)
 {
   struct {
-    char *expected;
-    char *actual;
+    const char *expected;
+    const char *actual;
   } equals[] = {
     /* star makes everything else go away */
     { "*", "*,*" },
@@ -70,9 +70,9 @@ static void
 test_subtract (void)
 {
   struct {
-    char *attributes;
-    char *subtract;
-    char *result;
+    const char *attributes;
+    const char *subtract;
+    const char *result;
   } subtractions[] = {
     /* * subtracts everything */
     { "*", "*", NULL },

gio/tests/gschema-compile.c

@@ -22,17 +22,17 @@ test_schema_do_compile (gpointer data)
   SchemaTest *test = (SchemaTest *) data;
   gchar *filename = g_strconcat (test->name, ".gschema.xml", NULL);
   gchar *path = g_test_build_filename (G_TEST_DIST, "schema-tests", filename, NULL);
-  gchar *argv[] = {
+  const gchar *argv[] = {
     GLIB_COMPILE_SCHEMAS,
     "--strict",
     "--dry-run",
     "--schema-file", path,
-    (gchar *)test->opt,
+    test->opt,
     NULL
   };
   gchar *envp[] = { NULL };
 
-  execve (argv[0], argv, envp);
+  execve (argv[0], (char **) argv, envp);
   g_assert_not_reached ();
 }
 

gio/tests/pollable.c

@@ -61,7 +61,7 @@ check_source_readability_callback (gpointer user_data)
 static gboolean
 write_callback (gpointer user_data)
 {
-  char *buf = "x";
+  const char *buf = "x";
   gssize nwrote;
   GError *error = NULL;
 

gio/tests/simple-proxy.c

@@ -32,7 +32,7 @@ static void
 test_uris (void)
 {
   GProxyResolver *resolver;
-  gchar *ignore_hosts[2] = { "127.0.0.1", NULL };
+  const gchar *ignore_hosts[2] = { "127.0.0.1", NULL };
   gchar **proxies;
   GError *error = NULL;
   const gchar *uri;
@@ -41,7 +41,7 @@ test_uris (void)
 
   /* Valid URI. */
   uri = "http://%E0%B4%A8%E0%B4%B2:80/";
-  resolver = g_simple_proxy_resolver_new (NULL, ignore_hosts);
+  resolver = g_simple_proxy_resolver_new (NULL, (char **) ignore_hosts);
 
   proxies = g_proxy_resolver_lookup (resolver, uri, NULL, &error);
   g_assert_no_error (error);
@@ -60,7 +60,7 @@ test_uris (void)
   /* Invalid URI. */
   uri = "%E0%B4%A8%E0%B4%B2";
   str = g_strdup_printf ("Invalid URI ‘%s’", uri);
-  resolver = g_simple_proxy_resolver_new (NULL, ignore_hosts);
+  resolver = g_simple_proxy_resolver_new (NULL, (char **) ignore_hosts);
 
   proxies = g_proxy_resolver_lookup (resolver, uri, NULL, &error);
   g_assert_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT);
@@ -81,7 +81,7 @@ test_uris (void)
   g_object_unref (resolver);
   g_free (str);
 
-  resolver = g_simple_proxy_resolver_new ("default://", ignore_hosts);
+  resolver = g_simple_proxy_resolver_new ("default://", (char **) ignore_hosts);
   g_simple_proxy_resolver_set_uri_proxy (G_SIMPLE_PROXY_RESOLVER (resolver),
                                          "http", "http://proxy.example.com");
   g_simple_proxy_resolver_set_uri_proxy (G_SIMPLE_PROXY_RESOLVER (resolver),
@@ -136,11 +136,11 @@ static void
 test_socks (void)
 {
   GProxyResolver *resolver;
-  gchar *ignore_hosts[2] = { "127.0.0.1", NULL };
+  const gchar *ignore_hosts[2] = { "127.0.0.1", NULL };
   gchar **proxies;
   GError *error = NULL;
 
-  resolver = g_simple_proxy_resolver_new ("socks://proxy.example.com", ignore_hosts);
+  resolver = g_simple_proxy_resolver_new ("socks://proxy.example.com", (char **) ignore_hosts);
 
   proxies = g_proxy_resolver_lookup (resolver, "http://one.example.com/",
                                      NULL, &error);
@@ -160,7 +160,7 @@ test_socks (void)
 
   g_object_unref (resolver);
 
-  resolver = g_simple_proxy_resolver_new ("default-proxy://", ignore_hosts);
+  resolver = g_simple_proxy_resolver_new ("default-proxy://", (char **) ignore_hosts);
   g_simple_proxy_resolver_set_uri_proxy (G_SIMPLE_PROXY_RESOLVER (resolver),
                                          "http", "socks://proxy.example.com");