common/rfb/util.cxx

/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
 * 
 * This 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 software 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 software; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
 * USA.
 */

/*
 * The following applies to stcasecmp and strncasecmp implementations:
 *
 * Copyright (c) 1987 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that this notice is preserved and that due credit is given
 * to the University of California at Berkeley. The name of the University
 * may not be used to endorse or promote products derived from this
 * software without specific written prior permission. This software
 * is provided ``as is'' without express or implied warranty.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <sys/time.h>

#include <rfb/util.h>

// Provide strcasecmp() and/or strncasecmp() if absent on this system.

#ifndef WIN32
#if !defined(HAVE_STRCASECMP) || !defined(HAVE_STRNCASECMP)

extern "C" {

/*
 * This array is designed for mapping upper and lower case letter
 * together for a case independent comparison.  The mappings are
 * based upon ascii character sequences.
 */
static unsigned char s_charmap[] = {
	'\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
	'\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
	'\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
	'\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
	'\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
	'\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
	'\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
	'\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
	'\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
	'\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
	'\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
	'\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
	'\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
	'\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
	'\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
	'\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
	'\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
	'\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
	'\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
	'\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
	'\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
	'\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
	'\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
	'\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
	'\300', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
	'\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
	'\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
	'\370', '\371', '\372', '\333', '\334', '\335', '\336', '\337',
	'\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
	'\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
	'\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
	'\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
};

#ifndef HAVE_STRCASECMP
int
strcasecmp(const char *s1, const char *s2)
{
    unsigned char u1, u2;

    for (;;) {
	u1 = (unsigned char) *s1++;
	u2 = (unsigned char) *s2++;
	if (s_charmap[u1] != s_charmap[u2]) {
	    return s_charmap[u1] - s_charmap[u2];
	}
	if (u1 == '\0') {
	    return 0;
	}
    }
}
#endif // !defined(HAVE_STRCASECMP)

#ifndef HAVE_STRNCASECMP
int
strncasecmp(const char *s1, const char *s2, size_t n)
{
    unsigned char u1, u2;

    for (; n != 0; --n) {
	u1 = (unsigned char) *s1++;
	u2 = (unsigned char) *s2++;
	if (s_charmap[u1] != s_charmap[u2]) {
	    return s_charmap[u1] - s_charmap[u2];
	}
	if (u1 == '\0') {
	    return 0;
	}
    }
    return 0;
}
#endif // !defined(HAVE_STRNCASECMP)

} // extern "C"

#endif // !defined(HAVE_STRCASECMP) || !defined(HAVE_STRNCASECMP)
#endif // defined(WIN32)

namespace rfb {

  char* strDup(const char* s) {
    if (!s) return 0;
    int l = strlen(s);
    char* r = new char[l+1];
    memcpy(r, s, l+1);
    return r;
  };

  void strFree(char* s) {
    delete [] s;
  }


  bool strSplit(const char* src, const char limiter, char** out1, char** out2, bool fromEnd) {
    CharArray out1old, out2old;
    if (out1) out1old.buf = *out1;
    if (out2) out2old.buf = *out2;
    int len = strlen(src);
    int i=0, increment=1, limit=len;
    if (fromEnd) {
      i=len-1; increment = -1; limit = -1;
    }
    while (i!=limit) {
      if (src[i] == limiter) {
        if (out1) {
          *out1 = new char[i+1];
          if (i) memcpy(*out1, src, i);
          (*out1)[i] = 0;
        }
        if (out2) {
          *out2 = new char[len-i];
          if (len-i-1) memcpy(*out2, &src[i+1], len-i-1);
          (*out2)[len-i-1] = 0;
        }
        return true;
      }
      i+=increment;
    }
    if (out1) *out1 = strDup(src);
    if (out2) *out2 = 0;
    return false;
  }

  bool strContains(const char* src, char c) {
    int l=strlen(src);
    for (int i=0; i<l; i++)
      if (src[i] == c) return true;
    return false;
  }

  void strCopy(char* dest, const char* src, int destlen) {
    if (src)
      strncpy(dest, src, destlen-1);
    dest[src ? destlen-1 : 0] = 0;
  }

  unsigned msSince(const struct timeval *then)
  {
    struct timeval now;
    unsigned diff;

    gettimeofday(&now, NULL);

    diff = (now.tv_sec - then->tv_sec) * 1000;

    diff += now.tv_usec / 1000;
    diff -= then->tv_usec / 1000;

    return diff;
  }
};