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string_utils.cpp
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string_utils.cpp
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// SuperTuxKart - a fun racing game with go-kart
//
// Copyright (C) 2004-2013 Steve Baker <sjbaker1@airmail.net>,
// Copyright (C) 2004-2013 Ingo Ruhnke <grumbel@gmx.de>
// Copyright (C) 2006-2013 SuperTuxKart-Team
//
// 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 (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 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.
#include "utils/string_utils.hpp"
#include "utils/log.hpp"
#include "utils/time.hpp"
#include "coreutil.h"
#include <math.h>
#include <algorithm>
#include <cstring>
#include <stdio.h>
#include <exception>
#include <assert.h>
namespace StringUtils
{
bool hasSuffix(const std::string& lhs, const std::string rhs)
{
if (lhs.length() < rhs.length())
return false;
else
// While this is basically correct, it fails with older
// g++ versions (at least 2.95.3), which have a wrong template. To
// avoid this issue, a more C-traditional way is used.
return strcmp(lhs.c_str()+(lhs.length()-rhs.length()),
rhs.c_str() )==0;
} // hasSuffix
bool startsWith(const std::string& str, const std::string& prefix)
{
if (str.length() < prefix.length())
return false;
else
return strncmp(str.c_str(), prefix.c_str(), prefix.size())==0;
}
//-------------------------------------------------------------------------
/** Returns the path of a filename, i.e. everything till the last '/'.
*/
std::string getPath(const std::string& filename)
{
for(int i = int(filename.size()) - 1; i >= 0; --i)
{
if (filename[i]=='/' || filename[i]=='\\')
{
return filename.substr(0,i);
}
}
return "";
} // getPath
//-------------------------------------------------------------------------
/** Returns the basename of a filename, i.e. everything after the last "/".
*/
std::string getBasename(const std::string& filename)
{
for(int i = int(filename.size()) - 1; i >= 0; --i)
{
if (filename[i]=='/' || filename[i]=='\\')
{
return filename.substr(i+1);
}
}
return filename;
} // getBasename
//-------------------------------------------------------------------------
/** Removes the extension, i.e. everything after the last ".".
*/
std::string removeExtension(const std::string& filename)
{
for(int i = int(filename.size()) - 1; i >= 0; --i)
{
if (filename[i] == '.')
{
return filename.substr(0, i);
}
}
return filename;
} // removeExtension
//-------------------------------------------------------------------------
/** Returns the extension, i.e. everything after the last "."
*/
std::string getExtension(const std::string& filename)
{
for(int i = int(filename.size()) - 1; i >= 0; --i)
{
if (filename[i] == '.')
{
return filename.substr(i+1);
}
}
return filename;
} // getExtension
//-------------------------------------------------------------------------
/** Checks if the input string is not empty. ( = has characters different
* from a space).
*/
bool notEmpty(const irr::core::stringw& input)
{
const int size = input.size();
int nonEmptyChars = 0;
for (int n=0; n<size; n++)
{
if (input[n] != L' ')
{
nonEmptyChars++;
}
}
return (nonEmptyChars > 0);
} // getExtension
//-------------------------------------------------------------------------
/** Returns a string converted to upper case.
*/
std::string toUpperCase(const std::string& str)
{
std::string name = str;
std::transform(name.begin(), name.end(), name.begin(), ::toupper);
return name;
} // toUpperCase
//-------------------------------------------------------------------------
/** Returns a string converted to lower case.
*/
std::string toLowerCase(const std::string& str)
{
std::string name = str;
std::transform(name.begin(), name.end(), name.begin(), ::tolower);
return name;
} // toLowerCase
//-------------------------------------------------------------------------
/** Splits a string into substrings separated by a certain character, and
* returns a std::vector of all those substring. E.g.:
* split("a b=c d=e",' ') --> ["a", "b=c", "d=e"]
* \param s The string to split.
* \param c The character by which the string is split.
*/
std::vector<std::string> split(const std::string& s, char c,
bool keepSplitChar)
{
std::vector<std::string> result;
try
{
std::string::size_type start=0;
while(start!=std::string::npos && start<s.size())
{
std::string::size_type i=s.find(c, start);
if (i!=std::string::npos)
{
if (keepSplitChar)
{
int from = start-1;
if (from < 0) from = 0;
result.push_back(std::string(s, from, i-from));
}
else result.push_back(std::string(s,start, i-start));
start=i+1;
}
else // end of string reached
{
if (keepSplitChar)
result.push_back(std::string(s,start-1));
else
result.push_back(std::string(s,start));
start = i;
}
}
return result;
}
catch (std::exception& e)
{
Log::error("StringUtils",
"Error in split(std::string) : %s @ line %i : %s.",
__FILE__, __LINE__, e.what());
Log::error("StringUtils", "Splitting '%s'.", s.c_str());
for (int n=0; n<(int)result.size(); n++)
{
Log::error("StringUtils", "Split : %s", result[n].c_str());
}
assert(false); // in debug mode, trigger debugger
exit(1);
}
} // split
//-------------------------------------------------------------------------
/** Splits a string into substrings separated by a certain character, and
* returns a std::vector of all those substring. E.g.:
* split("a b=c d=e",' ') --> ["a", "b=c", "d=e"]
* This is the version for wide strings.
* \param s The string to split.
* \param c The character by which the string is split.
*/
std::vector<irr::core::stringw> split(const irr::core::stringw& s, char c,
bool keepSplitChar)
{
try
{
std::vector<irr::core::stringw> result;
irr::s32 start = 0;
while (start < (irr::s32)s.size())
{
irr::s32 i = s.findNext(c, start);
if (i != -1)
{
if (keepSplitChar)
{
int from = start-1;
if (from < 0) from = 0;
result.push_back( s.subString(from, i-from) );
}
else result.push_back( s.subString(start, i-start) );
start = i+1;
}
else
{
if (keepSplitChar)
result.push_back( s.subString(start - 1,
s.size()-start + 1) );
else
result.push_back( s.subString(start, s.size()-start) );
return result;
//start = i+1;
}
}
return result;
}
catch (std::exception& e)
{
(void)e; // avoid warning about unused variable
Log::fatal("StringUtils",
"Fatal error in split(stringw) : %s @ line %i : '%s'.",
__FILE__, __LINE__, e.what());
exit(1);
}
} // split
std::vector<uint32_t> splitToUInt(const std::string& s, char c, bool keepSplitChar)
{
std::vector<std::string> parts = split(s, c, keepSplitChar);
std::vector<uint32_t> ints;
for(unsigned int i = 0; i < parts.size(); ++i)
{
ints.push_back(atoi(parts[i].c_str()));
}
return ints;
}
// ------------------------------------------------------------------------
/** Splits a : separated string (like PATH) into its individual components.
* It especially handles Windows-style paths (c:/mydir1:d:/mydir2)
* correctly, and removes a trailing "/" which can cause a problem with
* windows' stat function.
* \param path The string to split.
*/
std::vector<std::string> splitPath(const std::string& path)
{
try
{
std::vector<std::string> dirs=StringUtils::split(path,':');
for(int i=(int)dirs.size()-1; i>=0; i--)
{
// Remove '/' at the end of paths, since this can cause
// problems with windows when using stat()
while(dirs[i].size()>=1 && dirs[i][dirs[i].size()-1]=='/')
{
dirs[i]=dirs[i].substr(0, dirs[i].size()-1);
}
// remove empty entries
if(dirs[i].size()==0)
{
dirs.erase(dirs.begin()+i);
continue;
}
} // for i
#ifdef WIN32
// Handle filenames like d:/dir, which becomes ["d","/dir"]
for(int i=(int)dirs.size()-1; i>=0; i--)
{
if(dirs[i].size()>1) continue;
if(i==dirs.size()-1) // last element
{
dirs[i]+=":"; // turn "c" back into "c:"
}
else
{
dirs[i]+=":"+dirs[i+1]; // restore "d:/dir" back
dirs.erase(dirs.begin()+i+1);
}
} // for i
#endif
return dirs;
}
catch (std::exception& e)
{
(void)e; // avoid warning about unused variable
Log::fatal("StringUtils",
"Fatal error in splitPath : %s @ line %i: '%s'.",
__FILE__, __LINE__, path.c_str());
exit(1);
}
} // splitPath
// ------------------------------------------------------------------------
std::string insertValues(const std::string &s,
std::vector<std::string>& all_vals)
{
try
{
std::vector<std::string> sv = StringUtils::split(s, '%', true);
std::string new_string="";
unsigned int insertValID = 0;
const unsigned int item_count = sv.size();
for (unsigned int i=0; i<item_count; i++)
{
if(sv[i][0] != '%')
{
new_string += sv[i];
}
else
{
if(sv[i][1]=='s' || sv[i][1]=='d' || sv[i][1]=='i')
{
if (insertValID >= all_vals.size())
{
Log::warn("StringUtils",
"insertValues: "
"Invalid number of arguments in '%s'.",
s.c_str());
new_string += "??" + sv[i].substr(2);
}
else
{
new_string += all_vals[insertValID]
+ sv[i].substr(2);
}
insertValID++;
}
else if(sv[i][1]>='0' && sv[i][1]<= '9')
{
const unsigned int index = sv[i][1] - '0';
if (index >= all_vals.size())
{
Log::warn("StringUtils", "insertValues: "
" Invalid argument index in '%s' "
"for %i.", s.c_str(), index);
new_string += "??" + sv[i].substr(2);
}
else
{
new_string += all_vals[index] + sv[i].substr(2);
}
}
else
{
new_string += sv[i];
}
}
}
return new_string;
}
catch (std::exception& e)
{
(void)e; // avoid warning about unused variable
Log::fatal("StringUtils",
"Fatal error in insertValues(std::string) : %s @ "
"line %i: '%s'", __FILE__, __LINE__, s.c_str());
exit(1);
}
}
// ------------------------------------------------------------------------
irr::core::stringw insertValues(const irr::core::stringw &s,
std::vector<irr::core::stringw>& all_vals)
{
try
{
unsigned int insertValID = 0;
const std::vector<irr::core::stringw> sv =
StringUtils::split(s, '%', true);
irr::core::stringw new_string="";
const unsigned int size = sv.size();
for (unsigned int i=0; i<size; i++)
{
if(sv[i][0] != '%')
{
new_string += sv[i];
}
else
{
if (sv[i][1]=='s' || sv[i][1]=='d' || sv[i][1]=='i')
{
if (insertValID >= all_vals.size())
{
Log::warn("StringUtils", "insertValues: "
"Invalid number of arguments in '%s'\n",
irr::core::stringc(s.c_str()).c_str());
new_string += "??";
new_string += sv[i].subString(2, sv[i].size()-2);
}
else
{
new_string += all_vals[insertValID].c_str();
new_string += sv[i].subString(2, sv[i].size()-2);
}
insertValID++;
}
else if(irr::core::isdigit(sv[i][1]))
{
irr::core::stringw rest =
sv[i].subString(2, sv[i].size()-2);
int delta = 0;
if (sv[i].size() >= 4 && sv[i][2]=='$')
{
rest = sv[i].subString(4, sv[i].size()-4);
delta = -1;
}
const unsigned int index =
irr::core::stringc(sv[i].c_str()).c_str()[1]
- '0' + delta;
if (index >= all_vals.size())
{
Log::warn("StringUtils", "insertValues: "
"Invalid argument ID in '%s' : %i\n",
irr::core::stringc(s.c_str()).c_str(),
index);
new_string += "??";
new_string += rest;
}
else
{
new_string += all_vals[index] + rest;
}
}
else
{
new_string+=sv[i];
}
}
}
return new_string;
}
catch (std::exception& e)
{
(void)e; // avoid warning about unused variable
Log::fatal("StringUtils",
"Fatal error in insertValues(stringw) : %s @ line %i.",
__FILE__, __LINE__);
exit(1);
}
}
// ------------------------------------------------------------------------
/** Converts a time in seconds into a string of the form mm:ss:hh (minutes,
* seconds, 1/100 seconds.
* \param time Time in seconds.
*/
std::string timeToString(float time)
{
int int_time = (int)(time*100.0f+0.5f);
// Avoid problems if time is negative or way too large (which
// should only happen if something is broken in a track elsewhere,
// and an incorrect finishing time is estimated.
if(int_time<0)
return std::string("00:00:00");
else if(int_time >= 10000*60) // up to 99:59.99
return std::string("99:59:99");
int min = int_time / 6000;
int sec = (int_time-min*6000)/100;
int hundredths = (int_time - min*6000-sec*100);
// The proper c++ way would be:
// std::ostringstream s;
// s<<std::setw(2)<<std::setfill(' ')<<min<<":"
// <<std::setw(2)<<std::setfill('0')<<sec<<":"
// <<std::setw(2)<<std::setfill(' ')<<hundredths;
// return s.str();
// but that appears to be awfully complicated and slow, compared to
// which admittedly only works for min < 100000 - which is about 68
// days - good enough.
char s[12];
sprintf ( s, "%02d:%02d:%02d", min, sec, hundredths) ;
return std::string(s);
} // timeToString
// ------------------------------------------------------------------------
/** Shows a increasing number of dots.
* \param interval A float representing the time it takes to add a new dot
* \param max_dots The number of dots used. Defaults to 3.
*/
irr::core::stringw loadingDots(float interval, int max_dots)
{
int nr_dots = int(floor(StkTime::getRealTime() / interval))
% (max_dots + 1);
return irr::core::stringw((std::string(nr_dots, '.') +
std::string(max_dots - nr_dots, ' ')).c_str());
} // loadingDots
// ------------------------------------------------------------------------
/** Returns the string given with loadingDots appended. A simple
* convenience function to type less in calls.
* \parameter s The string to which the loading dots are appended.
*/
irr::core::stringw loadingDots(const wchar_t *s)
{
return irr::core::stringw(s) + loadingDots();
} // loadingDots
// ------------------------------------------------------------------------
/** Replaces values in a string.
* \param other string in which to replace stuff
* \param from pattern to remove from the string
* \param to pattern to insert instead
* \return a string with all occurrences of \c from replaced by
* occurrences of \c to
*/
std::string replace(const std::string& other, const std::string& from,
const std::string& to)
{
std::string wip = other;
while (true)
{
const int pos = wip.find(from);
if (pos == -1)
{
return wip;
}
wip.replace(pos, from.size(), to.c_str(), to.size());
}
}
// ------------------------------------------------------------------------
/** Converts ASCII text with HTML entities (e.g. &xE9;) to unicode strings
* \param input The input string which should be decoded.
* \return A irrlicht wide string with unicode characters.
*/
irr::core::stringw decodeFromHtmlEntities(const std::string& input)
{
irr::core::stringw output;
std::string entity;
bool isHex = false;
enum
{
NORMAL,
ENTITY_PREAMBLE,
ENTITY_BODY
} state = NORMAL;
for (unsigned int n=0; n<input.size(); n++)
{
switch (state)
{
case NORMAL:
if (input[n] == '&')
{
state = ENTITY_PREAMBLE;
entity = "";
isHex = false;
}
else
{
output += wchar_t(input[n]);
}
break;
case ENTITY_PREAMBLE:
if (input[n] != '#')
{
output += L"&";
output += wchar_t(input[n]);
// This is actually an error, but we can't print a
// warning here: irrxml replaces & in (e.g.)
// attribute values with '&' - so we can have a single
// '&' that is correct. On the other hand we have to
// convert esp. &# hex codes, since we use this to
// encode special characters, but irrlicht does not
// decode those.
state = NORMAL;
}
else
{
state = ENTITY_BODY;
}
break;
case ENTITY_BODY:
if (input[n] == 'x' && entity.size() == 0)
{
isHex = true;
}
else if (input[n] == ';')
{
int c;
const char* format = (isHex ? "%x" : "%i");
if (sscanf(entity.c_str(), format, &c) == 1)
{
output += wchar_t(c);
}
else
{
Log::warn("StringUtils", "non-numeric HTML "
"entity not supported in '%s'.",
input.c_str());
}
state = NORMAL;
}
else
{
entity += wchar_t(input[n]);
}
break;
}
}
return output;
} // decodeFromHtmlEntities
// ------------------------------------------------------------------------
/** Converts a unicode string to plain ASCII using html-like & codes.
* \param s The input string which should be encoded.
* \return A std:;string with ASCII characters.
*/
std::string encodeToHtmlEntities(const irr::core::stringw &s)
{
std::ostringstream output;
for(unsigned int i=0; i<s.size(); i++)
{
if(s[i]=='&')
output<<"&";
else
{
if(s[i]<128)
{
irr::c8 c=(char)(s[i]);
output<<c;
}
else
{
output <<"&#x" << std::hex <<std::uppercase<< s[i]<<";";
}
}
}
return output.str();
} // encodeToHtmlEntities
// ------------------------------------------------------------------------
/** Converts a version string (in the form of 'X.Y.Za-rcU' into an
* integer number.
* \param s The version string to convert.
*/
int versionToInt(const std::string &version_string)
{
// Special case: SVN
if(version_string=="SVN" || version_string=="svn")
{
// SVN version will be version 99.99.99i-rcJ
return 1000000*99
+ 10000*99
+ 100*99
+ 10* 9
+ 9;
}
std::string s=version_string;
// To guarantee that a release gets a higher version number than
// a release candidate, we assign a 'release_candidate' number
// of 9 to versions which are not a RC. We assert that any RC
// is less than 9 to guarantee the ordering.
int release_candidate=9;
if(s.length()>4 && sscanf(s.substr(s.length()-4, 4).c_str(), "-rc%d",
&release_candidate)==1)
{
s = s.substr(0, s.length()-4);
// Otherwise a RC can get a higher version number than
// the corresponding release! If this should ever get
// triggered, multiply all scaling factors above and
// below by 10, to get two digits for RC numbers.
assert(release_candidate<9);
}
int very_minor=0;
if(s.length()>0 && s[s.size()-1]>='a' && s[s.size()-1]<='z')
{
very_minor = s[s.size()-1]-'a'+1;
s = s.substr(0, s.size()-1);
}
std::vector<std::string> l = StringUtils::split(s, '.');
while(l.size()<3)
l.push_back("0");
int version = 1000000*atoi(l[0].c_str())
+ 10000*atoi(l[1].c_str())
+ 100*atoi(l[2].c_str())
+ 10*very_minor
+ release_candidate;
if(version<=0)
printf("Invalid version string '%s'.\n", s.c_str());
return version;
} // versionToInt
} // namespace StringUtils
/* EOF */