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-rw-r--r--src/st/croco/cr-selector.c306
1 files changed, 306 insertions, 0 deletions
diff --git a/src/st/croco/cr-selector.c b/src/st/croco/cr-selector.c
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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
+ *
+ * See COPYRIGHTS file for copyright information.
+ */
+
+#include <string.h>
+#include "cr-selector.h"
+#include "cr-parser.h"
+
+/**
+ * cr_selector_new:
+ *
+ *@a_simple_sel: the initial simple selector list
+ *of the current instance of #CRSelector.
+ *
+ *Creates a new instance of #CRSelector.
+ *
+ *Returns the newly built instance of #CRSelector, or
+ *NULL in case of failure.
+ */
+CRSelector *
+cr_selector_new (CRSimpleSel * a_simple_sel)
+{
+ CRSelector *result = NULL;
+
+ result = g_try_malloc (sizeof (CRSelector));
+ if (!result) {
+ cr_utils_trace_info ("Out of memory");
+ return NULL;
+ }
+ memset (result, 0, sizeof (CRSelector));
+ result->simple_sel = a_simple_sel;
+ return result;
+}
+
+CRSelector *
+cr_selector_parse_from_buf (const guchar * a_char_buf, enum CREncoding a_enc)
+{
+ CRParser *parser = NULL;
+
+ g_return_val_if_fail (a_char_buf, NULL);
+
+ parser = cr_parser_new_from_buf ((guchar*)a_char_buf, strlen ((const char *) a_char_buf),
+ a_enc, FALSE);
+ g_return_val_if_fail (parser, NULL);
+
+ return NULL;
+}
+
+/**
+ * cr_selector_append:
+ *
+ *@a_this: the current instance of #CRSelector.
+ *@a_new: the instance of #CRSelector to be appended.
+ *
+ *Appends a new instance of #CRSelector to the current selector list.
+ *
+ *Returns the new list.
+ */
+CRSelector *
+cr_selector_append (CRSelector * a_this, CRSelector * a_new)
+{
+ CRSelector *cur = NULL;
+
+ if (!a_this) {
+ return a_new;
+ }
+
+ /*walk forward the list headed by a_this to get the list tail */
+ for (cur = a_this; cur && cur->next; cur = cur->next) ;
+
+ cur->next = a_new;
+ a_new->prev = cur;
+
+ return a_this;
+}
+
+/**
+ * cr_selector_prepend:
+ *
+ *@a_this: the current instance of #CRSelector list.
+ *@a_new: the instance of #CRSelector.
+ *
+ *Prepends an element to the #CRSelector list.
+ *
+ *Returns the new list.
+ */
+CRSelector *
+cr_selector_prepend (CRSelector * a_this, CRSelector * a_new)
+{
+ CRSelector *cur = NULL;
+
+ a_new->next = a_this;
+ a_this->prev = a_new;
+
+ for (cur = a_new; cur && cur->prev; cur = cur->prev) ;
+
+ return cur;
+}
+
+/**
+ * cr_selector_append_simple_sel:
+ *
+ *@a_this: the current instance of #CRSelector.
+ *@a_simple_sel: the simple selector to append.
+ *
+ *append a simple selector to the current #CRSelector list.
+ *
+ *Returns the new list or NULL in case of failure.
+ */
+CRSelector *
+cr_selector_append_simple_sel (CRSelector * a_this,
+ CRSimpleSel * a_simple_sel)
+{
+ CRSelector *selector = NULL;
+
+ selector = cr_selector_new (a_simple_sel);
+ g_return_val_if_fail (selector, NULL);
+
+ return cr_selector_append (a_this, selector);
+}
+
+guchar *
+cr_selector_to_string (CRSelector const * a_this)
+{
+ guchar *result = NULL;
+ GString *str_buf = NULL;
+
+ str_buf = g_string_new (NULL);
+ g_return_val_if_fail (str_buf, NULL);
+
+ if (a_this) {
+ CRSelector const *cur = NULL;
+
+ for (cur = a_this; cur; cur = cur->next) {
+ if (cur->simple_sel) {
+ guchar *tmp_str = NULL;
+
+ tmp_str = cr_simple_sel_to_string
+ (cur->simple_sel);
+
+ if (tmp_str) {
+ if (cur->prev)
+ g_string_append (str_buf,
+ ", ");
+
+ g_string_append (str_buf, (const gchar *) tmp_str);
+
+ g_free (tmp_str);
+ tmp_str = NULL;
+ }
+ }
+ }
+ }
+
+ if (str_buf) {
+ result = (guchar *) str_buf->str;
+ g_string_free (str_buf, FALSE);
+ str_buf = NULL;
+ }
+
+ return result;
+}
+
+/**
+ * cr_selector_dump:
+ *
+ *@a_this: the current instance of #CRSelector.
+ *@a_fp: the destination file.
+ *
+ *Serializes the current instance of #CRSelector to a file.
+ */
+void
+cr_selector_dump (CRSelector const * a_this, FILE * a_fp)
+{
+ guchar *tmp_buf = NULL;
+
+ if (a_this) {
+ tmp_buf = cr_selector_to_string (a_this);
+ if (tmp_buf) {
+ fprintf (a_fp, "%s", tmp_buf);
+ g_free (tmp_buf);
+ tmp_buf = NULL;
+ }
+ }
+}
+
+/**
+ * cr_selector_ref:
+ *
+ *@a_this: the current instance of #CRSelector.
+ *
+ *Increments the ref count of the current instance
+ *of #CRSelector.
+ */
+void
+cr_selector_ref (CRSelector * a_this)
+{
+ g_return_if_fail (a_this);
+
+ a_this->ref_count++;
+}
+
+/**
+ * cr_selector_unref:
+ *
+ *@a_this: the current instance of #CRSelector.
+ *
+ *Decrements the ref count of the current instance of
+ *#CRSelector.
+ *If the ref count reaches zero, the current instance of
+ *#CRSelector is destroyed.
+ *
+ *Returns TRUE if this function destroyed the current instance
+ *of #CRSelector, FALSE otherwise.
+ */
+gboolean
+cr_selector_unref (CRSelector * a_this)
+{
+ g_return_val_if_fail (a_this, FALSE);
+
+ if (a_this->ref_count) {
+ a_this->ref_count--;
+ }
+
+ if (a_this->ref_count == 0) {
+ cr_selector_destroy (a_this);
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+/**
+ * cr_selector_destroy:
+ *
+ *@a_this: the current instance of #CRSelector.
+ *
+ *Destroys the selector list.
+ */
+void
+cr_selector_destroy (CRSelector * a_this)
+{
+ CRSelector *cur = NULL;
+
+ g_return_if_fail (a_this);
+
+ /*
+ *go and get the list tail. In the same time, free
+ *all the simple selectors contained in the list.
+ */
+ for (cur = a_this; cur && cur->next; cur = cur->next) {
+ if (cur->simple_sel) {
+ cr_simple_sel_destroy (cur->simple_sel);
+ cur->simple_sel = NULL;
+ }
+ }
+
+ if (cur) {
+ if (cur->simple_sel) {
+ cr_simple_sel_destroy (cur->simple_sel);
+ cur->simple_sel = NULL;
+ }
+ }
+
+ /*in case the list has only one element */
+ if (cur && !cur->prev) {
+ g_free (cur);
+ return;
+ }
+
+ /*walk backward the list and free each "next element" */
+ for (cur = cur->prev; cur && cur->prev; cur = cur->prev) {
+ if (cur->next) {
+ g_free (cur->next);
+ cur->next = NULL;
+ }
+ }
+
+ if (!cur)
+ return;
+
+ if (cur->next) {
+ g_free (cur->next);
+ cur->next = NULL;
+ }
+
+ g_free (cur);
+}