utils.cc

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/*
 * This file is part of openSDK.
 *
 * Copyright (C) 2006-2007 openSDK team
 *
 * openSDK 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; version 2.
 *
 * openSDK 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 openSDK; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *     $Id: utils.cc,v 1.6 2007/01/26 23:12:05 nuno-lopes Exp $
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include <utils.h>
#include <Platform.h>

using namespace std;

const void* file_get_contents(const char *filename, size_t* size)
{
        struct stat sbuf;
        int fd;
        const char *str;

        if ((fd = open(filename, O_RDONLY)) == -1 || fstat(fd, &sbuf) == -1) {
                *size = (size_t)-1;
                return NULL;
        }

        if ((*size = sbuf.st_size) == 0) {
                str = NULL;

        } else if ((str = (const char*)mmap(0, *size, PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED) {
                str  = NULL;
                *size = (size_t)-1;
        }

        close(fd);
        return str;
}

bool file_unmap_contents(void* base, size_t size)
{
        return (munmap(base, size) == 0 ? true : false);
}

bool getNonEmptyLine(fstream& file, string& line, bool onlyMySection, bool* mySection)
{
        while(getline(file, line)) {
                size_t idx = line.find_first_not_of(" \t");
                if (idx != string::npos && idx != 0) {
                        line.erase(0, idx);
                }

                // skip comments and blank lines
                if (line[0] == '#' || line[0] == '\r' || line[0] == '\n') {
                        continue;
                }

                if (onlyMySection) {
                        if (line[0] == '[') { // start of a new section
                                *mySection = (line == "[" ROBOTDESIGN "]");
                                continue;
                        } else if(!*mySection) {
                                continue;
                        }
                }

                size_t end = line.find_first_of("\r\n");
                if (end != string::npos) {
                        line[end] = '\0';
                }

                // skip empty lines
                if (end == 0 || !line[0]) {
                        continue;
                }

                return true;
        }

        return false;
}

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