source: vbox/trunk/src/VBox/GuestHost/OpenGL/util/url.c@ 21308

/* Copyright (c) 2001, Stanford University
 * All rights reserved
 *
 * See the file LICENSE.txt for information on redistributing this software.
 */

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>

#include "cr_string.h"
#include "cr_url.h"
#include "cr_error.h"

static int is_digit_string( const char *s )
{
     if (!isdigit( (int) *s))
        {
                return 0;
        }

     while (*s && isdigit ( (int) *s))
        {
                s++;
        }

        return ( *s == 0 );
}

int crParseURL( const char *url, char *protocol, char *hostname,
                                unsigned short *port, unsigned short default_port )
{
        const char *temp, *temp2;

        /* pull off the protocol */
        temp = crStrstr( url, "://" );
        if ( temp == NULL && protocol != NULL )
        {
                crStrcpy( protocol, "tcpip" );
                temp = url;
        }
        else 
        {
                if (protocol != NULL) {
                        int len = temp - url;
                        crStrncpy( protocol, url, len );
                        protocol[len] = 0;
                }
                temp += 3;
        }

        /* handle a trailing :<digits> to specify the port */

        /* there might be a filename here */
        temp2 = crStrrchr( temp, '/' );
        if ( temp2 == NULL )
        {
                temp2 = crStrrchr( temp, '\\' );
        }
        if ( temp2 == NULL )
        {
                temp2 = temp;
        }

        temp2 = crStrrchr( temp2, ':' );
        if ( temp2 )
        {
                if (hostname != NULL) {
                        int len = temp2 - temp;
                        crStrncpy( hostname, temp, len );
                        hostname[len] = 0;
                }
                temp2++;
                if ( !is_digit_string( temp2 ) )
                        goto bad_url;

                if (port != NULL)
                        *port = (unsigned short) atoi( temp2 );
        }
        else
        {
                if (hostname != NULL)
                        crStrcpy( hostname, temp );
                if (port != NULL)
                *port = default_port;
        }

        return 1;

 bad_url:
        crWarning( "URL: expected <protocol>://"
                                   "<destination>[:<port>], what is \"%s\"?", url );
        return 0;
}