[glib] gio-tool: Unify buffer sizes

[Ondrej Holy <oholy src gnome org>]

commit 37cddec0ee141beefc74e2b67f2e0808d3c94ff2
Author: Ondrej Holy <oholy redhat com>
Date:   Fri Aug 11 13:21:28 2017 +0200

    gio-tool: Unify buffer sizes
    
    Recently, buffer size for copying has been increased in order to improve
    performance:
    https://bugzilla.gnome.org/show_bug.cgi?id=773823
    
    Let's do the same for gio-tool-save and gio-tool-cat.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=786460

 gio/gio-tool-cat.c  |   10 ++++++++--
 gio/gio-tool-save.c |    9 +++++++--
 2 files changed, 15 insertions(+), 4 deletions(-)
---
diff --git a/gio/gio-tool-cat.c b/gio/gio-tool-cat.c
index 1e40188..086fcf5 100644
--- a/gio/gio-tool-cat.c
+++ b/gio/gio-tool-cat.c
@@ -42,11 +42,14 @@ static const GOptionEntry entries[] = {
   { NULL }
 };
 
+/* 256k minus malloc overhead */
+#define STREAM_BUFFER_SIZE (1024*256 - 2*sizeof(gpointer))
+
 static gboolean
 cat (GFile *file)
 {
   GInputStream *in;
-  char buffer[1024 * 8 + 1];
+  char *buffer;
   char *p;
   gssize res;
   gboolean close_res;
@@ -62,10 +65,11 @@ cat (GFile *file)
       return FALSE;
     }
 
+  buffer = g_malloc (STREAM_BUFFER_SIZE);
   success = TRUE;
   while (1)
     {
-      res = g_input_stream_read (in, buffer, sizeof (buffer) - 1, NULL, &error);
+      res = g_input_stream_read (in, buffer, STREAM_BUFFER_SIZE, NULL, &error);
       if (res > 0)
         {
           gssize written;
@@ -109,6 +113,8 @@ cat (GFile *file)
       success = FALSE;
     }
 
+  g_free (buffer);
+
   return success;
 }
 
diff --git a/gio/gio-tool-save.c b/gio/gio-tool-save.c
index 49ab720..370299c 100644
--- a/gio/gio-tool-save.c
+++ b/gio/gio-tool-save.c
@@ -58,12 +58,15 @@ static const GOptionEntry entries[] =
   { NULL }
 };
 
+/* 256k minus malloc overhead */
+#define STREAM_BUFFER_SIZE (1024*256 - 2*sizeof(gpointer))
+
 static gboolean
 save (GFile *file)
 {
   GOutputStream *out;
   GFileCreateFlags flags;
-  char buffer[1025];
+  char *buffer;
   char *p;
   gssize res;
   gboolean close_res;
@@ -88,11 +91,12 @@ save (GFile *file)
       return FALSE;
     }
 
+  buffer = g_malloc (STREAM_BUFFER_SIZE);
   save_res = TRUE;
 
   while (1)
     {
-      res = read (STDIN_FILENO, buffer, 1024);
+      res = read (STDIN_FILENO, buffer, STREAM_BUFFER_SIZE);
       if (res > 0)
        {
          gssize written;
@@ -147,6 +151,7 @@ save (GFile *file)
     }
 
   g_object_unref (out);
+  g_free (buffer);
 
   return save_res;
 }