glib/libglib/src/gerror.c
changeset 0 e4d67989cc36
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/glib/libglib/src/gerror.c	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,259 @@
+/* GLIB - Library of useful routines for C programming
+ * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
+ * Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
+ * file for a list of people on the GLib Team.  See the ChangeLog
+ * files for a list of changes.  These files are distributed with
+ * GLib at ftp://ftp.gtk.org/pub/gtk/. 
+ */
+
+#include "config.h"
+
+#include "glib.h"
+#include "galias.h"
+
+
+static GError* 
+g_error_new_valist (GQuark         domain,
+                    gint           code,
+                    const gchar   *format,
+                    va_list        args)
+{
+  GError *error;
+  error = g_new (GError, 1);
+  
+  error->domain = domain;
+  error->code = code;
+  error->message = g_strdup_vprintf (format, args);
+  
+  return error;
+}
+
+/**
+ * g_error_new:
+ * @domain: error domain 
+ * @code: error code
+ * @format: printf()-style format for error message
+ * @Varargs: parameters for message format
+ * 
+ * Creates a new #GError with the given @domain and @code,
+ * and a message formatted with @format.
+ * 
+ * Return value: a new #GError
+ **/
+EXPORT_C GError*
+g_error_new (GQuark       domain,
+             gint         code,
+             const gchar *format,
+             ...)
+{
+  GError* error;
+  va_list args;
+
+  g_return_val_if_fail (format != NULL, NULL);
+  g_return_val_if_fail (domain != 0, NULL);
+
+  va_start (args, format);
+  error = g_error_new_valist (domain, code, format, args);
+  va_end (args);
+
+  return error;
+}
+
+/**
+ * g_error_new_literal:
+ * @domain: error domain
+ * @code: error code
+ * @message: error message
+ * 
+ * Creates a new #GError; unlike g_error_new(), @message is not
+ * a printf()-style format string. Use this 
+ * function if @message contains text you don't have control over, 
+ * that could include printf() escape sequences.
+ * 
+ * Return value: a new #GError
+ **/
+EXPORT_C GError*
+g_error_new_literal (GQuark         domain,
+                     gint           code,
+                     const gchar   *message)
+{
+  GError* err;
+
+  g_return_val_if_fail (message != NULL, NULL);
+  g_return_val_if_fail (domain != 0, NULL);
+  err = g_new (GError, 1);
+
+  err->domain = domain;
+  err->code = code;
+  err->message = g_strdup (message);
+  
+  return err;
+}
+
+/**
+ * g_error_free:
+ * @error: a #GError
+ *
+ * Frees a #GError and associated resources.
+ * 
+ **/
+EXPORT_C void
+g_error_free (GError *error)
+{
+  g_return_if_fail (error != NULL);  
+
+  g_free (error->message);
+
+  g_free (error);
+}
+
+/**
+ * g_error_copy:
+ * @error: a #GError
+ * 
+ * Makes a copy of @error.
+ * 
+ * Return value: a new #GError
+ **/
+EXPORT_C GError*
+g_error_copy (const GError *error)
+{
+  GError *copy;
+  
+  g_return_val_if_fail (error != NULL, NULL);
+  copy = g_new (GError, 1);
+
+  *copy = *error;
+
+  copy->message = g_strdup (error->message);
+
+  return copy;
+}
+
+/**
+ * g_error_matches:
+ * @error: a #GError
+ * @domain: an error domain
+ * @code: an error code
+ * 
+ * Returns %TRUE if @error matches @domain and @code, %FALSE
+ * otherwise.
+ * 
+ * Return value: whether @error has @domain and @code
+ **/
+EXPORT_C gboolean
+g_error_matches (const GError *error,
+                 GQuark        domain,
+                 gint          code)
+{
+  return error &&
+    error->domain == domain &&
+    error->code == code;
+}
+
+#define ERROR_OVERWRITTEN_WARNING "GError set over the top of a previous GError or uninitialized memory.\n" \
+               "This indicates a bug in someone's code. You must ensure an error is NULL before it's set.\n" \
+               "The overwriting error message was: %s"
+
+/**
+ * g_set_error:
+ * @err: a return location for a #GError, or %NULL
+ * @domain: error domain
+ * @code: error code 
+ * @format: printf()-style format
+ * @Varargs: args for @format 
+ * 
+ * Does nothing if @err is %NULL; if @err is non-%NULL, then *@err must
+ * be %NULL. A new #GError is created and assigned to *@err.
+ **/
+EXPORT_C void
+g_set_error (GError      **err,
+             GQuark        domain,
+             gint          code,
+             const gchar  *format,
+             ...)
+{
+  GError *new;
+  
+  va_list args;
+
+  if (err == NULL)
+    return;
+  
+  va_start (args, format);
+  new = g_error_new_valist (domain, code, format, args);
+  va_end (args);
+
+  if (*err == NULL)
+    *err = new;
+  else
+    g_warning (ERROR_OVERWRITTEN_WARNING, new->message);    
+}
+
+/**
+ * g_propagate_error:
+ * @dest: error return location
+ * @src: error to move into the return location
+ * 
+ * If @dest is %NULL, free @src; otherwise,
+ * moves @src into *@dest. *@dest must be %NULL.
+ **/
+EXPORT_C void    
+g_propagate_error (GError       **dest,
+		   GError        *src)
+{
+  g_return_if_fail (src != NULL);
+  
+  if (dest == NULL)
+    {
+      if (src)
+        g_error_free (src);
+      return;
+    }
+  else
+    {
+      if (*dest != NULL)
+        g_warning (ERROR_OVERWRITTEN_WARNING, src->message);
+      else
+        *dest = src;
+    }
+}
+
+/**
+ * g_clear_error:
+ * @err: a #GError return location
+ * 
+ * If @err is %NULL, does nothing. If @err is non-%NULL,
+ * calls g_error_free() on *@err and sets *@err to %NULL.
+ **/
+EXPORT_C void
+g_clear_error (GError **err)
+{
+  if (err && *err)
+    {
+      g_error_free (*err);
+      *err = NULL;
+    }
+}
+
+#define __G_ERROR_C__
+#include "galiasdef.c"