+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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 2 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction. Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License. This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2009 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief Ini file reader module.
+ *
+ * \version $Id$
+ * \author Luca Ottaviano <lottaviano@develer.com>
+ */
+
+#include "ini_reader.h"
+#include "cfg/cfg_ini_reader.h"
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+
+/*
+ * Returns when the line containing the section is found.
+ * The file pointer is positioned at the start of the next line.
+ * Returns EOF if no section was found, 0 otherwise.
+ */
+static int findSection(KFile *fd, const char *section, char *line, size_t size)
+{
+ while (kfile_gets(fd, line, size) != EOF)
+ {
+ char *ptr = line;
+ unsigned i;
+ /* accept only sections that begin at first char */
+ if (*ptr++ != '[')
+ continue;
+ /* find the end-of-section character */
+ for (i = 0; i < size && *ptr != ']'; ++i, ++ptr)
+ ;
+ /* did we find the correct section? */
+ if(strncmp(&line[1], section, i))
+ continue;
+ else
+ return 0;
+ }
+ return EOF;
+}
+
+/*
+ * Fills the argument with the key found in line
+ */
+static char *getKey(const char *line, char *key, size_t size)
+{
+ /* null-terminated string */
+ while (isspace(*line))
+ ++line;
+ int i = 0;
+ while (*line != '=' && !isspace(*line) && size)
+ {
+ key[i++] = *line;
+ ++line;
+ --size;
+ }
+ size ? (key[i] = '\0') : (key[i-1] = '\0');
+ return key;
+}
+
+/*
+ * Fills the argument with the value found in line.
+ */
+static char *getValue(const char *line, char *value, size_t size)
+{
+ while (*line++ != '=')
+ ;
+ while (isspace(*line))
+ ++line;
+ int i = 0;
+ while (*line && size)
+ {
+ value[i++] = *line++;
+ --size;
+ }
+ size ? (value[i] = '\0') : (value[i-1] = '\0');
+ return value;
+}
+
+/**
+ * Look for key inside a section.
+ *
+ * The function reads lines from input file. It fills the line parameter to allow splitting
+ * the key-value couple. It returns with error if a new section begins and no key was found.
+ * \return 0 if key was found, EOF on errors.
+ */
+static int findKey(KFile *fd, const char *key, char *line, size_t size)
+{
+ while (kfile_gets(fd, line, size) != EOF && *line != '[')
+ {
+ char curr_key[30];
+ getKey(line, curr_key, 30);
+ /* check key */
+ if (!strcmp(curr_key, key))
+ return 0;
+ }
+ return EOF;
+}
+
+/*
+ * On errors, the function returns EOF and fills the buffer with the default value.
+ */
+int ini_getString(KFile *fd, const char *section, const char *key, const char *default_value, char *buf, size_t size)
+{
+ char line[CONFIG_INI_MAX_LINE_LEN];
+ if (kfile_seek(fd, 0, KSM_SEEK_SET) == EOF)
+ goto error;
+
+ if (findSection(fd, section, line, CONFIG_INI_MAX_LINE_LEN) == EOF)
+ goto error;
+
+ if (findKey(fd, key, line, CONFIG_INI_MAX_LINE_LEN) == EOF)
+ goto error;
+ else
+ getValue(line, buf, size);
+ return 0;
+
+error:
+ strncpy(buf, default_value, size);
+ if (size > 0)
+ buf[size - 1] = '\0';
+ return EOF;
+}