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+/* -*- Mode: C; indent-tabs-mode:nil; c-basic-offset: 8-*- */
+
+/*
+ * This file is part of The Croco Library
+ *
+ * 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
+ *
+ * Author: Dodji Seketeli
+ * See COPYRIGHTS file for copyright information.
+ */
+
+#include <stdio.h>
+#include <glib.h>
+#include "cr-utils.h"
+#include "cr-rgb.h"
+#include "cr-num.h"
+#include "cr-string.h"
+
+#ifndef __CR_TERM_H__
+#define __CR_TERM_H__
+
+G_BEGIN_DECLS
+
+/**
+ *@file
+ *Declaration of the #CRTerm class.
+ */
+
+enum CRTermType
+{
+ TERM_NO_TYPE = 0,
+ TERM_NUMBER,
+ TERM_FUNCTION,
+ TERM_STRING,
+ TERM_IDENT,
+ TERM_URI,
+ TERM_RGB,
+ TERM_UNICODERANGE,
+ TERM_HASH
+} ;
+
+
+enum UnaryOperator
+{
+ NO_UNARY_UOP = 0,
+ PLUS_UOP,
+ MINUS_UOP,
+ EMPTY_UNARY_UOP
+} ;
+
+enum Operator
+{
+ NO_OP = 0,
+ DIVIDE,
+ COMMA
+} ;
+
+struct _CRTerm ;
+typedef struct _CRTerm CRTerm ;
+
+/**
+ *An abstraction of a css2 term as
+ *defined in the CSS2 spec in appendix D.1:
+ *term ::=
+ *[ NUMBER S* | PERCENTAGE S* | LENGTH S* | EMS S* | EXS S*
+ *| ANGLE S* | TIME S* | FREQ S* | function ]
+ * | STRING S* | IDENT S* | URI S* | RGB S*
+ *| UNICODERANGE S* | hexcolor
+ */
+struct _CRTerm
+{
+ /**
+ *The type of the term.
+ */
+ enum CRTermType type ;
+
+ /**
+ *The unary operator associated to
+ *the current term.
+ */
+ enum UnaryOperator unary_op ;
+
+ /**
+ *The operator associated to the current term.
+ */
+ enum Operator the_operator ;
+
+
+ /**
+ *The content of the term.
+ *Depending of the type of the term,
+ *this holds either a number, a percentage ...
+ */
+ union
+ {
+ CRNum *num ;
+ CRString * str ;
+ CRRgb * rgb ;
+ } content ;
+
+ /**
+ *If the term is of type UNICODERANGE,
+ *this field holds the upper bound of the range.
+ *if the term is of type FUNCTION, this holds
+ *an instance of CRTerm that represents
+ * the expression which is the argument of the function.
+ */
+ union
+ {
+ CRTerm *func_param ;
+ } ext_content ;
+
+ /**
+ *A flag to indicate if there is an n as in the nth child expression 'an+b'.
+ */
+ gboolean n;
+
+ /**
+ *A spare pointer, just in case.
+ *Can be used by the application.
+ */
+ gpointer app_data ;
+
+ glong ref_count ;
+
+ /**
+ *A pointer to the next term,
+ *just in case this term is part of
+ *an expression.
+ */
+ CRTerm *next ;
+
+ /**
+ *A pointer to the previous
+ *term.
+ */
+ CRTerm *prev ;
+ CRParsingLocation location ;
+} ;
+
+CRTerm * cr_term_parse_expression_from_buf (const guchar *a_buf,
+ enum CREncoding a_encoding) ;
+CRTerm * cr_term_new (void) ;
+
+enum CRStatus cr_term_set_number (CRTerm *a_this, CRNum *a_num) ;
+
+enum CRStatus cr_term_set_function (CRTerm *a_this,
+ CRString *a_func_name,
+ CRTerm *a_func_param) ;
+
+enum CRStatus cr_term_set_string (CRTerm *a_this, CRString *a_str) ;
+
+enum CRStatus cr_term_set_ident (CRTerm *a_this, CRString *a_str) ;
+
+enum CRStatus cr_term_set_uri (CRTerm *a_this, CRString *a_str) ;
+
+enum CRStatus cr_term_set_rgb (CRTerm *a_this, CRRgb *a_rgb) ;
+
+enum CRStatus cr_term_set_hash (CRTerm *a_this, CRString *a_str) ;
+
+CRTerm * cr_term_append_term (CRTerm *a_this, CRTerm *a_new_term) ;
+
+CRTerm * cr_term_prepend_term (CRTerm *a_this, CRTerm *a_new_term) ;
+
+guchar * cr_term_to_string (CRTerm const *a_this) ;
+
+guchar * cr_term_one_to_string (CRTerm const * a_this) ;
+
+void cr_term_dump (CRTerm const *a_this, FILE *a_fp) ;
+
+int cr_term_nr_values (CRTerm const *a_this) ;
+
+CRTerm * cr_term_get_from_list (CRTerm *a_this, int itemnr) ;
+
+void cr_term_ref (CRTerm *a_this) ;
+
+gboolean cr_term_unref (CRTerm *a_this) ;
+
+void cr_term_destroy (CRTerm * a_term) ;
+
+G_END_DECLS
+
+#endif /*__CR_TERM_H__*/