separated the library into two projects. Libcroco is now the combination

2004-01-24  Dodji Seketeli  <dodji@gnome.org>

* all: separated the library into two projects. Libcroco
is now the combination of the parser and the selection engine.
A new project is born: sewfox. It is basically the
xml rendering/layout engine.
Libcroco now needs libxml2 and glib only.
Sewfox need libgnomecanvas2.

1 files changed, 194 insertions, 0 deletions

diff --git a/src/cr-enc-handler.c b/src/cr-enc-handler.c
new file mode 100644
index 0000000..85ad1c5
--- /dev/null
+++ b/src/cr-enc-handler.c
@@ -0,0 +1,194 @@
+/* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
+
+/*
+ * This file is part of The Croco Library
+ *
+ * Copyright (C) 2002-2003 Dodji Seketeli <dodji@seketeli.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2.1 of the GNU Lesser General Public
+ * License as published by the Free Software Foundation.
+ *
+ * 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 Lesser General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+/*
+ *$Id$
+ */
+
+/**
+ *@file
+ *The definition of the #CREncHandler class.
+ */
+
+
+#include "cr-enc-handler.h"
+#include "cr-utils.h"
+
+#include <string.h>
+
+struct CREncAlias {
+	const gchar * name ;
+	enum CREncoding encoding ;
+} ;
+
+static struct CREncAlias gv_default_aliases[] =
+{
+	{"UTF-8", CR_UTF_8},
+	{"UTF_8", CR_UTF_8},
+	{"UTF8", CR_UTF_8},
+	{"UTF-16", CR_UTF_16},
+	{"UTF_16", CR_UTF_16},
+	{"UTF16", CR_UTF_16},
+	{"UCS1", CR_UCS_1},
+	{"UCS-1", CR_UCS_1},
+	{"UCS_1", CR_UCS_1},
+	{"ISO-8859-1", CR_UCS_1},
+	{"ISO_8859-1", CR_UCS_1},
+	{"UCS-1", CR_UCS_1},
+	{"UCS_1", CR_UCS_1},
+	{"UCS4", CR_UCS_4},
+	{"UCS-4", CR_UCS_4},
+	{"UCS_4", CR_UCS_4},
+	{"ASCII", CR_ASCII},
+	{0, 0}
+} ;
+
+
+static CREncHandler gv_default_enc_handlers[] =
+{
+	{CR_UCS_1, cr_utils_ucs1_to_utf8, cr_utils_utf8_to_ucs1,
+        cr_utils_ucs1_str_len_as_utf8, cr_utils_utf8_str_len_as_ucs1},
+
+        {CR_ISO_8859_1, cr_utils_ucs1_to_utf8, cr_utils_utf8_to_ucs1,
+        cr_utils_ucs1_str_len_as_utf8, cr_utils_utf8_str_len_as_ucs1},
+
+        {CR_ASCII, cr_utils_ucs1_to_utf8, cr_utils_utf8_to_ucs1,
+         cr_utils_ucs1_str_len_as_utf8, cr_utils_utf8_str_len_as_ucs1},
+
+        {0, NULL, NULL, NULL, NULL}
+} ;
+
+
+/**
+ *Gets the instance of encoding handler.
+ *This function implements a singleton pattern.
+ *@param a_enc the encoding of the Handler.
+ *@return the instance of #CREncHandler.
+ */
+CREncHandler *
+cr_enc_handler_get_instance (enum CREncoding a_enc)
+{
+        gulong i = 0 ;
+
+        for (i = 0 ;gv_default_enc_handlers[i].encoding ; i++)
+        {
+                if (gv_default_enc_handlers[i].encoding == a_enc)
+                {
+                        return 
+                                (CREncHandler *)
+                                &gv_default_enc_handlers[i].encoding ;
+                }
+        }
+
+        return NULL ;
+}
+
+
+/**
+ *Given an encoding name (called an alias name)
+ *the function returns the matching encoding type.
+ *@param a_alias_name the encoding name
+ *@param a_enc output param. The returned encoding type
+ *or 0 if the alias is not supported.
+ *@return CR_OK upon successfull completion, an error code otherwise.
+ */
+enum CRStatus
+cr_enc_handler_resolve_enc_alias (const guchar *a_alias_name, 
+				  enum CREncoding *a_enc)
+{
+	gulong i = 0 ;
+	guchar * alias_name_up = NULL ;
+	enum CRStatus status = CR_ENCODING_NOT_FOUND_ERROR ;
+
+	g_return_val_if_fail (a_alias_name != NULL, CR_BAD_PARAM_ERROR) ;
+
+	alias_name_up = g_strdup (a_alias_name) ;
+	g_strup (alias_name_up) ;
+
+	for (i = 0 ; gv_default_aliases[i].name ; i++)
+	{
+		if (!strcmp (gv_default_aliases[i].name, alias_name_up))
+		{
+			*a_enc = gv_default_aliases[i].encoding ;
+			status = CR_OK ;
+			break ;
+		}
+	}
+
+	return status ;
+}
+
+
+/**
+ *Converts a raw input buffer into an utf8 buffer.
+ *@param a_this the current instance of #CREncHandler.
+ *@param a_in the input buffer to convert.
+ *@param a_in_len in/out parameter. The len of the input
+ *buffer to convert. After return, contains the number of
+ *bytes actually consumed.
+ *@param @a_out output parameter. The converted output buffer.
+ *Must be freed by the buffer.
+ *@param a_out_len output parameter. The length of the output buffer.
+ *@return CR_OK upon successfull completion, an error code otherwise.
+ */
+enum CRStatus
+cr_enc_handler_convert_input (CREncHandler *a_this,
+                              const guchar *a_in,
+                              gulong *a_in_len,
+                              guchar **a_out,
+                              gulong *a_out_len)
+{
+        enum CRStatus status = CR_OK ;
+
+        g_return_val_if_fail (a_this && a_in && a_in_len && a_out,
+                              CR_BAD_PARAM_ERROR) ;
+
+        if (a_this->decode_input == NULL) return CR_OK ;
+
+        if (a_this->enc_str_len_as_utf8)
+        {
+                status =
+                        a_this->enc_str_len_as_utf8 (a_in,
+                                                     &a_in[*a_in_len -1],
+                                                     a_out_len) ;
+
+                g_return_val_if_fail (status == CR_OK, status) ;
+        }
+        else
+        {
+                *a_out_len = *a_in_len ;
+        }
+
+        *a_out = g_malloc0 (*a_out_len) ;
+
+        status = a_this->decode_input (a_in, a_in_len, *a_out, a_out_len) ;
+
+        if (status != CR_OK)
+        {
+                g_free (*a_out) ;
+                *a_out = NULL ;
+        }
+
+        g_return_val_if_fail (status == CR_OK, status) ;
+
+        return CR_OK ;
+}