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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "string.h"
#include "pointer.h"
#include "numeric.h"
#include <sstream>
#include <iomanip>
#include "../sha1.h"
#include "../base64.h"
#include "../hex.h"
#include "../porting.h"
std::wstring narrow_to_wide(const std::string& mbs)
{
size_t wcl = mbs.size();
Buffer<wchar_t> wcs(wcl+1);
size_t l = mbstowcs(*wcs, mbs.c_str(), wcl);
if(l == (size_t)(-1))
return L"<invalid multibyte string>";
wcs[l] = 0;
return *wcs;
}
std::string wide_to_narrow(const std::wstring& wcs)
{
size_t mbl = wcs.size()*4;
SharedBuffer<char> mbs(mbl+1);
size_t l = wcstombs(*mbs, wcs.c_str(), mbl);
if(l == (size_t)(-1)) {
return "Character conversion failed!";
}
else
mbs[l] = 0;
return *mbs;
}
// Get an sha-1 hash of the player's name combined with
// the password entered. That's what the server uses as
// their password. (Exception : if the password field is
// blank, we send a blank password - this is for backwards
// compatibility with password-less players).
std::string translatePassword(std::string playername, std::wstring password)
{
if(password.length() == 0)
return "";
std::string slt = playername + wide_to_narrow(password);
SHA1 sha1;
sha1.addBytes(slt.c_str(), slt.length());
unsigned char *digest = sha1.getDigest();
std::string pwd = base64_encode(digest, 20);
free(digest);
return pwd;
}
std::string urlencode(std::string str)
{
// Encodes non-unreserved URI characters by a percent sign
// followed by two hex digits. See RFC 3986, section 2.3.
static const char url_hex_chars[] = "0123456789ABCDEF";
std::ostringstream oss(std::ios::binary);
for (u32 i = 0; i < str.size(); i++) {
unsigned char c = str[i];
if (isalnum(c) || c == '-' || c == '.' || c == '_' || c == '~')
oss << c;
else
oss << "%"
<< url_hex_chars[(c & 0xf0) >> 4]
<< url_hex_chars[c & 0x0f];
}
return oss.str();
}
std::string urldecode(std::string str)
{
// Inverse of urlencode
std::ostringstream oss(std::ios::binary);
for (u32 i = 0; i < str.size(); i++) {
unsigned char highvalue, lowvalue;
if (str[i] == '%' &&
hex_digit_decode(str[i+1], highvalue) &&
hex_digit_decode(str[i+2], lowvalue)) {
oss << (char) ((highvalue << 4) | lowvalue);
i += 2;
}
else
oss << str[i];
}
return oss.str();
}
u32 readFlagString(std::string str, FlagDesc *flagdesc, u32 *flagmask)
{
u32 result = 0, mask = 0;
char *s = &str[0];
char *flagstr, *strpos = NULL;
while ((flagstr = strtok_r(s, ",", &strpos))) {
s = NULL;
while (*flagstr == ' ' || *flagstr == '\t')
flagstr++;
bool flagset = true;
if (!strncasecmp(flagstr, "no", 2)) {
flagset = false;
flagstr += 2;
}
for (int i = 0; flagdesc[i].name; i++) {
if (!strcasecmp(flagstr, flagdesc[i].name)) {
mask |= flagdesc[i].flag;
if (flagset)
result |= flagdesc[i].flag;
break;
}
}
}
if (flagmask)
*flagmask = mask;
return result;
}
std::string writeFlagString(u32 flags, FlagDesc *flagdesc, u32 flagmask)
{
std::string result;
for (int i = 0; flagdesc[i].name; i++) {
if (flagmask & flagdesc[i].flag) {
if (!(flags & flagdesc[i].flag))
result += "no";
result += flagdesc[i].name;
result += ", ";
}
}
size_t len = result.length();
if (len >= 2)
result.erase(len - 2, 2);
return result;
}
size_t mystrlcpy(char *dst, const char *src, size_t size)
{
size_t srclen = strlen(src) + 1;
size_t copylen = MYMIN(srclen, size);
if (copylen > 0) {
memcpy(dst, src, copylen);
dst[copylen - 1] = '\0';
}
return srclen;
}
char *mystrtok_r(char *s, const char *sep, char **lasts)
{
char *t;
if (!s)
s = *lasts;
while (*s && strchr(sep, *s))
s++;
if (!*s)
return NULL;
t = s;
while (*t) {
if (strchr(sep, *t)) {
*t++ = '\0';
break;
}
t++;
}
*lasts = t;
return s;
}
u64 read_seed(const char *str)
{
char *endptr;
u64 num;
if (str[0] == '0' && str[1] == 'x')
num = strtoull(str, &endptr, 16);
else
num = strtoull(str, &endptr, 10);
if (*endptr)
num = murmur_hash_64_ua(str, (int)strlen(str), 0x1337);
return num;
}
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