3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #ifndef UTIL_STRING_HEADER
21 #define UTIL_STRING_HEADER
23 #include "irrlichttypes_bloated.h"
32 #define STRINGIFY(x) #x
33 #define TOSTRING(x) STRINGIFY(x)
35 typedef std::map<std::string, std::string> StringMap;
42 // try not to convert between wide/utf8 encodings; this can result in data loss
43 // try to only convert between them when you need to input/output stuff via Irrlicht
44 std::wstring utf8_to_wide(const std::string &input);
45 std::string wide_to_utf8(const std::wstring &input);
47 // NEVER use those two functions unless you have a VERY GOOD reason to
48 // they just convert between wide and multibyte encoding
49 // multibyte encoding depends on current locale, this is no good, especially on Windows
51 // You must free the returned string!
52 // The returned string is allocated using new
53 wchar_t *narrow_to_wide_c(const char *str);
54 std::wstring narrow_to_wide(const std::string &mbs);
55 std::string wide_to_narrow(const std::wstring &wcs);
57 std::string urlencode(std::string str);
58 std::string urldecode(std::string str);
59 u32 readFlagString(std::string str, const FlagDesc *flagdesc, u32 *flagmask);
60 std::string writeFlagString(u32 flags, const FlagDesc *flagdesc, u32 flagmask);
61 size_t mystrlcpy(char *dst, const char *src, size_t size);
62 char *mystrtok_r(char *s, const char *sep, char **lasts);
63 u64 read_seed(const char *str);
64 bool parseColorString(const std::string &value, video::SColor &color, bool quiet);
68 * Returns a copy of \p str with spaces inserted at the right hand side to ensure
69 * that the string is \p len characters in length. If \p str is <= \p len then the
70 * returned string will be identical to str.
72 inline std::string padStringRight(std::string str, size_t len)
75 str.insert(str.end(), len - str.size(), ' ');
81 * Returns a version of \p str with the first occurrence of a string
82 * contained within ends[] removed from the end of the string.
85 * @param ends A NULL- or ""- terminated array of strings to remove from s in
86 * the copy produced. Note that once one of these strings is removed
87 * that no further postfixes contained within this array are removed.
89 * @return If no end could be removed then "" is returned.
91 inline std::string removeStringEnd(const std::string &str,
94 const char **p = ends;
96 for (; *p && (*p)[0] != '\0'; p++) {
98 if (str.size() < end.size())
100 if (str.compare(str.size() - end.size(), end.size(), end) == 0)
101 return str.substr(0, str.size() - end.size());
109 * Check two strings for equivalence. If \p case_insensitive is true
110 * then the case of the strings is ignored (default is false).
114 * @param case_insensitive
115 * @return true if the strings match
117 template <typename T>
118 inline bool str_equal(const std::basic_string<T> &s1,
119 const std::basic_string<T> &s2,
120 bool case_insensitive = false)
122 if (!case_insensitive)
125 if (s1.size() != s2.size())
128 for (size_t i = 0; i < s1.size(); ++i)
129 if(tolower(s1[i]) != tolower(s2[i]))
137 * Check whether \p str begins with the string prefix. If \p case_insensitive
138 * is true then the check is case insensitve (default is false; i.e. case is
143 * @param case_insensitive
144 * @return true if the str begins with prefix
146 template <typename T>
147 inline bool str_starts_with(const std::basic_string<T> &str,
148 const std::basic_string<T> &prefix,
149 bool case_insensitive = false)
151 if (str.size() < prefix.size())
154 if (!case_insensitive)
155 return str.compare(0, prefix.size(), prefix) == 0;
157 for (size_t i = 0; i < prefix.size(); ++i)
158 if (tolower(str[i]) != tolower(prefix[i]))
164 * Check whether \p str begins with the string prefix. If \p case_insensitive
165 * is true then the check is case insensitve (default is false; i.e. case is
170 * @param case_insensitive
171 * @return true if the str begins with prefix
173 template <typename T>
174 inline bool str_starts_with(const std::basic_string<T> &str,
176 bool case_insensitive = false)
178 return str_starts_with(str, std::basic_string<T>(prefix),
183 * Splits a string into its component parts separated by the character
186 * @return An std::vector<std::basic_string<T> > of the component parts
188 template <typename T>
189 inline std::vector<std::basic_string<T> > str_split(
190 const std::basic_string<T> &str,
193 std::vector<std::basic_string<T> > parts;
194 std::basic_stringstream<T> sstr(str);
195 std::basic_string<T> part;
197 while (std::getline(sstr, part, delimiter))
198 parts.push_back(part);
206 * @return A copy of \p str converted to all lowercase characters.
208 inline std::string lowercase(const std::string &str)
212 s2.reserve(str.size());
214 for (size_t i = 0; i < str.size(); i++)
215 s2 += tolower(str[i]);
223 * @return A copy of \p str with leading and trailing whitespace removed.
225 inline std::string trim(const std::string &str)
229 while (std::isspace(str[front]))
232 size_t back = str.size();
233 while (back > front && std::isspace(str[back - 1]))
236 return str.substr(front, back - front);
241 * Returns whether \p str should be regarded as (bool) true. Case and leading
242 * and trailing whitespace are ignored. Values that will return
243 * true are "y", "yes", "true" and any number that is not 0.
246 inline bool is_yes(const std::string &str)
248 std::string s2 = lowercase(trim(str));
250 return s2 == "y" || s2 == "yes" || s2 == "true" || atoi(s2.c_str()) != 0;
255 * Converts the string \p str to a signed 32-bit integer. The converted value
256 * is constrained so that min <= value <= max.
258 * @see atoi(3) for limitations
261 * @param min Range minimum
262 * @param max Range maximum
263 * @return The value converted to a signed 32-bit integer and constrained
264 * within the range defined by min and max (inclusive)
266 inline s32 mystoi(const std::string &str, s32 min, s32 max)
268 s32 i = atoi(str.c_str());
279 /// Returns a 64-bit value represented by the string \p str (decimal).
280 inline s64 stoi64(const std::string &str)
282 std::stringstream tmp(str);
288 // MSVC2010 includes it's own versions of these
289 //#if !defined(_MSC_VER) || _MSC_VER < 1600
293 * Returns a 32-bit value reprensented by the string \p str (decimal).
294 * @see atoi(3) for further limitations
296 inline s32 mystoi(const std::string &str)
298 return atoi(str.c_str());
303 * Returns s 32-bit value represented by the wide string \p str (decimal).
304 * @see atoi(3) for further limitations
306 inline s32 mystoi(const std::wstring &str)
308 return mystoi(wide_to_narrow(str));
313 * Returns a float reprensented by the string \p str (decimal).
316 inline float mystof(const std::string &str)
318 return atof(str.c_str());
326 // TODO: Replace with C++11 std::to_string.
328 /// Returns A string representing the value \p val.
329 template <typename T>
330 inline std::string to_string(T val)
332 std::ostringstream oss;
337 /// Returns a string representing the decimal value of the 32-bit value \p i.
338 inline std::string itos(s32 i) { return to_string(i); }
339 /// Returns a string representing the decimal value of the 64-bit value \p i.
340 inline std::string i64tos(s64 i) { return to_string(i); }
341 /// Returns a string representing the decimal value of the float value \p f.
342 inline std::string ftos(float f) { return to_string(f); }
346 * Replace all occurrences of \p pattern in \p str with \p replacement.
348 * @param str String to replace pattern with replacement within.
349 * @param pattern The pattern to replace.
350 * @param replacement What to replace the pattern with.
352 inline void str_replace(std::string &str, const std::string &pattern,
353 const std::string &replacement)
355 std::string::size_type start = str.find(pattern, 0);
356 while (start != str.npos) {
357 str.replace(start, pattern.size(), replacement);
358 start = str.find(pattern, start + replacement.size());
364 * Replace all occurrences of the character \p from in \p str with \p to.
366 * @param str The string to (potentially) modify.
367 * @param from The character in str to replace.
368 * @param to The replacement character.
370 void str_replace(std::string &str, char from, char to);
374 * Check that a string only contains whitelisted characters. This is the
375 * opposite of string_allowed_blacklist().
377 * @param str The string to be checked.
378 * @param allowed_chars A string containing permitted characters.
379 * @return true if the string is allowed, otherwise false.
381 * @see string_allowed_blacklist()
383 inline bool string_allowed(const std::string &str, const std::string &allowed_chars)
385 return str.find_first_not_of(allowed_chars) == str.npos;
390 * Check that a string contains no blacklisted characters. This is the
391 * opposite of string_allowed().
393 * @param str The string to be checked.
394 * @param blacklisted_chars A string containing prohibited characters.
395 * @return true if the string is allowed, otherwise false.
397 * @see string_allowed()
399 inline bool string_allowed_blacklist(const std::string &str,
400 const std::string &blacklisted_chars)
402 return str.find_first_of(blacklisted_chars) == str.npos;
407 * Create a string based on \p from where a newline is forcefully inserted
408 * every \p row_len characters.
410 * @note This function does not honour word wraps and blindy inserts a newline
411 * every \p row_len characters whether it breaks a word or not. It is
412 * intended to be used for, for example, showing paths in the GUI.
414 * @param from The string to be wrapped into rows.
415 * @param row_len The row length (in characters).
416 * @return A new string with the wrapping applied.
418 inline std::string wrap_rows(const std::string &from,
423 for (size_t i = 0; i < from.size(); i++) {
424 if (i != 0 && i % row_len == 0)
434 * Removes backslashes from an escaped string (FormSpec strings)
436 template <typename T>
437 inline std::basic_string<T> unescape_string(std::basic_string<T> &s)
439 std::basic_string<T> res;
441 for (size_t i = 0; i < s.length(); i++) {
455 * Checks that all characters in \p to_check are a decimal digits.
458 * @return true if to_check is not empty and all characters in to_check are
459 * decimal digits, otherwise false
461 inline bool is_number(const std::string &to_check)
463 for (size_t i = 0; i < to_check.size(); i++)
464 if (!std::isdigit(to_check[i]))
467 return !to_check.empty();
472 * Returns a C-string, either "true" or "false", corresponding to \p val.
474 * @return If \p val is true, then "true" is returned, otherwise "false".
476 inline const char *bool_to_cstr(bool val)
478 return val ? "true" : "false";