/* ------------------------------------------------------------ */
/*
HTTrack Website Copier, Offline Browser for Windows and Unix
Copyright (C) Xavier Roche and other contributors

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 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

Please visit our Website: http://www.httrack.com
*/

/* ------------------------------------------------------------ */
/* File: Strings                                                */
/* Author: Xavier Roche                                         */
/* ------------------------------------------------------------ */

// Strings a bit safer than static buffers

#ifndef HTS_PROXYSTRINGS_DEFSTATIC
#define HTS_PROXYSTRINGS_DEFSTATIC

#include "htsstrings.h"

/* Tools */

HTS_UNUSED static int ehexh(char c) {
  if ((c >= '0') && (c <= '9'))
    return c - '0';
  if ((c >= 'a') && (c <= 'f'))
    c -= ('a' - 'A');
  if ((c >= 'A') && (c <= 'F'))
    return (c - 'A' + 10);
  return 0;
}

HTS_UNUSED static int ehex(const char *s) {
  return 16 * ehexh(*s) + ehexh(*(s + 1));
}

HTS_UNUSED static void unescapehttp(const char *s, String * tempo) {
  int i;

  for(i = 0; s[i] != '\0'; i++) {
    if (s[i] == '%' && s[i + 1] == '%') {
      i++;
      StringAddchar(*tempo, '%');
    } else if (s[i] == '%') {
      char hc;

      i++;
      hc = (char) ehex(s + i);
      StringAddchar(*tempo, (char) hc);
      i++;                      // sauter 2 caractères finalement
    } else if (s[i] == '+') {
      StringAddchar(*tempo, ' ');
    } else
      StringAddchar(*tempo, s[i]);
  }
}

HTS_UNUSED static void escapexml(const char *s, String * tempo) {
  int i;

  for(i = 0; s[i] != '\0'; i++) {
    if (s[i] == '&')
      StringCat(*tempo, "&amp;");
    else if (s[i] == '<')
      StringCat(*tempo, "&lt;");
    else if (s[i] == '>')
      StringCat(*tempo, "&gt;");
    else if (s[i] == '\"')
      StringCat(*tempo, "&quot;");
    else
      StringAddchar(*tempo, s[i]);
  }
}

HTS_UNUSED static char *concat(char *catbuff, const char *a, const char *b) {
  if (a != NULL && a[0] != '\0') {
    strcpy(catbuff, a);
  } else {
    catbuff[0] = '\0';
  }
  if (b != NULL && b[0] != '\0') {
    strcat(catbuff, b);
  }
  return catbuff;
}

HTS_UNUSED static char *__fconv(char *a) {
#ifdef WIN32
  int i;

  for(i = 0; a[i] != 0; i++)
    if (a[i] == '/')            // Unix-to-DOS style
      a[i] = '\\';
#endif
  return a;
}

HTS_UNUSED static char *fconcat(char *catbuff, const char *a, const char *b) {
  return __fconv(concat(catbuff, a, b));
}

HTS_UNUSED static char *fconv(char *catbuff, const char *a) {
  return __fconv(concat(catbuff, a, ""));
}

#endif