script: getting started with the script tree

script.c

+/*
+ * Copyright (C) 2012  Alejandro Mery <amery@geeks.cl>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "sunxi-tools.h"
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "script.h"
+
+/*
+ */
+struct script *script_new(void)
+{
+	struct script *script;
+	if ((script = malloc(sizeof(*script))))
+		list_init(&script->sections);
+	return script;
+}
+
+/*
+ */
+struct script_section *script_section_append(struct script *script,
+					     const char *name)
+{
+	struct script_section *section;
+
+	assert(script != NULL);
+	assert(name != NULL);
+
+	if ((section = malloc(sizeof(*section)))) {
+		size_t l = strlen(name);
+		if (l>31) /* truncate */
+			l=31;
+		memcpy(section->name, name, l);
+		section->name[l] = '\0';
+
+		list_init(&section->entries);
+		list_append(&script->sections, &section->sections);
+	}
+	return section;
+}
+
+/*
+ */
+static inline void script_entry_append(struct script *script,
+				       struct script_entry *entry,
+				       enum script_value_type type,
+				       const char *name)
+{
+	size_t l;
+	struct script_section *section;
+
+	assert(script != NULL);
+	assert(!list_empty(&script->sections));
+	assert(entry != NULL);
+	assert(name != NULL);
+
+	section = container_of(list_last(&script->sections),
+			       struct script_section, sections);
+
+	l = strlen(name);
+	if (l>31) /* truncate */
+		l=31;
+	memcpy(entry->name, name, l);
+	entry->name[l] = '\0';
+
+	entry->type = type;
+
+	list_append(&section->entries, &entry->entries);
+}
+
+struct script_null_entry *script_null_entry_append(struct script *script,
+						   const char *name)
+{
+	struct script_null_entry *entry;
+
+	assert(script != NULL);
+	assert(!list_empty(&script->sections));
+	assert(name != NULL);
+
+	if ((entry = malloc(sizeof(*entry)))) {
+		script_entry_append(script, &entry->entry,
+				    SCRIPT_VALUE_TYPE_NULL, name);
+	}
+
+	return entry;
+}

script.h

+/*
+ * Copyright (C) 2012  Alejandro Mery <amery@geeks.cl>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _SUNXI_TOOLS_SCRIPT_H
+#define _SUNXI_TOOLS_SCRIPT_H
+
+/** head of the data tree */
+struct script {
+	struct list_entry sections;
+};
+
+/** head of each section */
+struct script_section {
+	char name[32];
+
+	struct list_entry sections;
+	struct list_entry entries;
+};
+
+/** types of values */
+enum script_value_type {
+	SCRIPT_VALUE_TYPE_SINGLE_WORD = 1,
+	SCRIPT_VALUE_TYPE_STRING,
+	SCRIPT_VALUE_TYPE_MULTI_WORD,
+	SCRIPT_VALUE_TYPE_GPIO,
+	SCRIPT_VALUE_TYPE_NULL,
+};
+
+/** generic entry */
+struct script_entry {
+	char name[32];
+	enum script_value_type type;
+
+	struct list_entry entries;
+};
+
+/** null entry */
+struct script_null_entry {
+	struct script_entry entry;
+};
+
+/** create a new script tree */
+struct script *script_new(void);
+
+/** create a new section appended to a given tree */
+struct script_section *script_section_append(struct script *script,
+					     const char *name);
+
+/** create a new empty/null entry appended to the last section of a tree */
+struct script_null_entry *script_null_entry_append(struct script *script,
+						   const char *name);
+
+#endif