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.
22 #include "irrlichttypes_bloated.h"
31 #include <unordered_map>
33 #define STRINGIFY(x) #x
34 #define TOSTRING(x) STRINGIFY(x)
36 // Checks whether a value is an ASCII printable character
37 #define IS_ASCII_PRINTABLE_CHAR(x) \
38 (((unsigned int)(x) >= 0x20) && \
39 ( (unsigned int)(x) <= 0x7e))
41 // Checks whether a byte is an inner byte for an utf-8 multibyte sequence
42 #define IS_UTF8_MULTB_INNER(x) \
43 (((unsigned char)(x) >= 0x80) && \
44 ( (unsigned char)(x) <= 0xbf))
46 // Checks whether a byte is a start byte for an utf-8 multibyte sequence
47 #define IS_UTF8_MULTB_START(x) \
48 (((unsigned char)(x) >= 0xc2) && \
49 ( (unsigned char)(x) <= 0xf4))
51 // Given a start byte x for an utf-8 multibyte sequence
52 // it gives the length of the whole sequence in bytes.
53 #define UTF8_MULTB_START_LEN(x) \
54 (((unsigned char)(x) < 0xe0) ? 2 : \
55 (((unsigned char)(x) < 0xf0) ? 3 : 4))
57 typedef std::unordered_map<std::string, std::string> StringMap;
64 // try not to convert between wide/utf8 encodings; this can result in data loss
65 // try to only convert between them when you need to input/output stuff via Irrlicht
66 std::wstring utf8_to_wide(const std::string &input);
67 std::string wide_to_utf8(const std::wstring &input);
69 wchar_t *utf8_to_wide_c(const char *str);
71 // NEVER use those two functions unless you have a VERY GOOD reason to
72 // they just convert between wide and multibyte encoding
73 // multibyte encoding depends on current locale, this is no good, especially on Windows
75 // You must free the returned string!
76 // The returned string is allocated using new
77 wchar_t *narrow_to_wide_c(const char *str);
78 std::wstring narrow_to_wide(const std::string &mbs);
79 std::string wide_to_narrow(const std::wstring &wcs);
81 std::string urlencode(const std::string &str);
82 std::string urldecode(const std::string &str);
83 u32 readFlagString(std::string str, const FlagDesc *flagdesc, u32 *flagmask);
84 std::string writeFlagString(u32 flags, const FlagDesc *flagdesc, u32 flagmask);
85 size_t mystrlcpy(char *dst, const char *src, size_t size);
86 char *mystrtok_r(char *s, const char *sep, char **lasts);
87 u64 read_seed(const char *str);
88 bool parseColorString(const std::string &value, video::SColor &color, bool quiet);
92 * Returns a copy of \p str with spaces inserted at the right hand side to ensure
93 * that the string is \p len characters in length. If \p str is <= \p len then the
94 * returned string will be identical to str.
96 inline std::string padStringRight(std::string str, size_t len)
99 str.insert(str.end(), len - str.size(), ' ');
105 * Returns a version of \p str with the first occurrence of a string
106 * contained within ends[] removed from the end of the string.
109 * @param ends A NULL- or ""- terminated array of strings to remove from s in
110 * the copy produced. Note that once one of these strings is removed
111 * that no further postfixes contained within this array are removed.
113 * @return If no end could be removed then "" is returned.
115 inline std::string removeStringEnd(const std::string &str,
118 const char **p = ends;
120 for (; *p && (*p)[0] != '\0'; p++) {
121 std::string end = *p;
122 if (str.size() < end.size())
124 if (str.compare(str.size() - end.size(), end.size(), end) == 0)
125 return str.substr(0, str.size() - end.size());
133 * Check two strings for equivalence. If \p case_insensitive is true
134 * then the case of the strings is ignored (default is false).
138 * @param case_insensitive
139 * @return true if the strings match
141 template <typename T>
142 inline bool str_equal(const std::basic_string<T> &s1,
143 const std::basic_string<T> &s2,
144 bool case_insensitive = false)
146 if (!case_insensitive)
149 if (s1.size() != s2.size())
152 for (size_t i = 0; i < s1.size(); ++i)
153 if(tolower(s1[i]) != tolower(s2[i]))
161 * Check whether \p str begins with the string prefix. If \p case_insensitive
162 * is true then the check is case insensitve (default is false; i.e. case is
167 * @param case_insensitive
168 * @return true if the str begins with prefix
170 template <typename T>
171 inline bool str_starts_with(const std::basic_string<T> &str,
172 const std::basic_string<T> &prefix,
173 bool case_insensitive = false)
175 if (str.size() < prefix.size())
178 if (!case_insensitive)
179 return str.compare(0, prefix.size(), prefix) == 0;
181 for (size_t i = 0; i < prefix.size(); ++i)
182 if (tolower(str[i]) != tolower(prefix[i]))
188 * Check whether \p str begins with the string prefix. If \p case_insensitive
189 * is true then the check is case insensitve (default is false; i.e. case is
194 * @param case_insensitive
195 * @return true if the str begins with prefix
197 template <typename T>
198 inline bool str_starts_with(const std::basic_string<T> &str,
200 bool case_insensitive = false)
202 return str_starts_with(str, std::basic_string<T>(prefix),
207 * Splits a string into its component parts separated by the character
210 * @return An std::vector<std::basic_string<T> > of the component parts
212 template <typename T>
213 inline std::vector<std::basic_string<T> > str_split(
214 const std::basic_string<T> &str,
217 std::vector<std::basic_string<T> > parts;
218 std::basic_stringstream<T> sstr(str);
219 std::basic_string<T> part;
221 while (std::getline(sstr, part, delimiter))
222 parts.push_back(part);
230 * @return A copy of \p str converted to all lowercase characters.
232 inline std::string lowercase(const std::string &str)
236 s2.reserve(str.size());
247 * @return A copy of \p str with leading and trailing whitespace removed.
249 inline std::string trim(const std::string &str)
253 while (std::isspace(str[front]))
256 size_t back = str.size();
257 while (back > front && std::isspace(str[back - 1]))
260 return str.substr(front, back - front);
265 * Returns whether \p str should be regarded as (bool) true. Case and leading
266 * and trailing whitespace are ignored. Values that will return
267 * true are "y", "yes", "true" and any number that is not 0.
270 inline bool is_yes(const std::string &str)
272 std::string s2 = lowercase(trim(str));
274 return s2 == "y" || s2 == "yes" || s2 == "true" || atoi(s2.c_str()) != 0;
279 * Converts the string \p str to a signed 32-bit integer. The converted value
280 * is constrained so that min <= value <= max.
282 * @see atoi(3) for limitations
285 * @param min Range minimum
286 * @param max Range maximum
287 * @return The value converted to a signed 32-bit integer and constrained
288 * within the range defined by min and max (inclusive)
290 inline s32 mystoi(const std::string &str, s32 min, s32 max)
292 s32 i = atoi(str.c_str());
303 // MSVC2010 includes it's own versions of these
304 //#if !defined(_MSC_VER) || _MSC_VER < 1600
308 * Returns a 32-bit value reprensented by the string \p str (decimal).
309 * @see atoi(3) for further limitations
311 inline s32 mystoi(const std::string &str)
313 return atoi(str.c_str());
318 * Returns s 32-bit value represented by the wide string \p str (decimal).
319 * @see atoi(3) for further limitations
321 inline s32 mystoi(const std::wstring &str)
323 return mystoi(wide_to_narrow(str));
328 * Returns a float reprensented by the string \p str (decimal).
331 inline float mystof(const std::string &str)
333 return atof(str.c_str());
341 /// Returns a value represented by the string \p val.
342 template <typename T>
343 inline T from_string(const std::string &str)
345 std::stringstream tmp(str);
351 /// Returns a 64-bit signed value represented by the string \p str (decimal).
352 inline s64 stoi64(const std::string &str) { return from_string<s64>(str); }
354 #if __cplusplus < 201103L
357 /// Returns a string representing the value \p val.
358 template <typename T>
359 inline string to_string(T val)
365 #define DEFINE_STD_TOSTRING_FLOATINGPOINT(T) \
367 inline string to_string<T>(T val) \
371 << std::setprecision(6) \
375 DEFINE_STD_TOSTRING_FLOATINGPOINT(float)
376 DEFINE_STD_TOSTRING_FLOATINGPOINT(double)
377 DEFINE_STD_TOSTRING_FLOATINGPOINT(long double)
379 #undef DEFINE_STD_TOSTRING_FLOATINGPOINT
381 /// Returns a wide string representing the value \p val
382 template <typename T>
383 inline wstring to_wstring(T val)
385 return utf8_to_wide(to_string(val));
390 /// Returns a string representing the decimal value of the 32-bit value \p i.
391 inline std::string itos(s32 i) { return std::to_string(i); }
392 /// Returns a string representing the decimal value of the 64-bit value \p i.
393 inline std::string i64tos(s64 i) { return std::to_string(i); }
395 // std::to_string uses the '%.6f' conversion, which is inconsistent with
396 // std::ostream::operator<<() and impractical too. ftos() uses the
397 // more generic and std::ostream::operator<<()-compatible '%G' format.
398 /// Returns a string representing the decimal value of the float value \p f.
399 inline std::string ftos(float f)
401 std::ostringstream oss;
408 * Replace all occurrences of \p pattern in \p str with \p replacement.
410 * @param str String to replace pattern with replacement within.
411 * @param pattern The pattern to replace.
412 * @param replacement What to replace the pattern with.
414 inline void str_replace(std::string &str, const std::string &pattern,
415 const std::string &replacement)
417 std::string::size_type start = str.find(pattern, 0);
418 while (start != str.npos) {
419 str.replace(start, pattern.size(), replacement);
420 start = str.find(pattern, start + replacement.size());
425 * Escapes characters [ ] \ , ; that can not be used in formspecs
427 inline void str_formspec_escape(std::string &str)
429 str_replace(str, "\\", "\\\\");
430 str_replace(str, "]", "\\]");
431 str_replace(str, "[", "\\[");
432 str_replace(str, ";", "\\;");
433 str_replace(str, ",", "\\,");
437 * Replace all occurrences of the character \p from in \p str with \p to.
439 * @param str The string to (potentially) modify.
440 * @param from The character in str to replace.
441 * @param to The replacement character.
443 void str_replace(std::string &str, char from, char to);
447 * Check that a string only contains whitelisted characters. This is the
448 * opposite of string_allowed_blacklist().
450 * @param str The string to be checked.
451 * @param allowed_chars A string containing permitted characters.
452 * @return true if the string is allowed, otherwise false.
454 * @see string_allowed_blacklist()
456 inline bool string_allowed(const std::string &str, const std::string &allowed_chars)
458 return str.find_first_not_of(allowed_chars) == str.npos;
463 * Check that a string contains no blacklisted characters. This is the
464 * opposite of string_allowed().
466 * @param str The string to be checked.
467 * @param blacklisted_chars A string containing prohibited characters.
468 * @return true if the string is allowed, otherwise false.
470 * @see string_allowed()
472 inline bool string_allowed_blacklist(const std::string &str,
473 const std::string &blacklisted_chars)
475 return str.find_first_of(blacklisted_chars) == str.npos;
480 * Create a string based on \p from where a newline is forcefully inserted
481 * every \p row_len characters.
483 * @note This function does not honour word wraps and blindy inserts a newline
484 * every \p row_len characters whether it breaks a word or not. It is
485 * intended to be used for, for example, showing paths in the GUI.
487 * @note This function doesn't wrap inside utf-8 multibyte sequences and also
488 * counts multibyte sequences correcly as single characters.
490 * @param from The (utf-8) string to be wrapped into rows.
491 * @param row_len The row length (in characters).
492 * @return A new string with the wrapping applied.
494 inline std::string wrap_rows(const std::string &from,
499 size_t character_idx = 0;
500 for (size_t i = 0; i < from.size(); i++) {
501 if (!IS_UTF8_MULTB_INNER(from[i])) {
502 // Wrap string after last inner byte of char
503 if (character_idx > 0 && character_idx % row_len == 0)
515 * Removes backslashes from an escaped string (FormSpec strings)
517 template <typename T>
518 inline std::basic_string<T> unescape_string(const std::basic_string<T> &s)
520 std::basic_string<T> res;
522 for (size_t i = 0; i < s.length(); i++) {
535 * Remove all escape sequences in \p s.
537 * @param s The string in which to remove escape sequences.
538 * @return \p s, with escape sequences removed.
540 template <typename T>
541 std::basic_string<T> unescape_enriched(const std::basic_string<T> &s)
543 std::basic_string<T> output;
545 while (i < s.length()) {
546 if (s[i] == '\x1b') {
548 if (i == s.length()) continue;
551 while (i < s.length() && s[i] != ')') {
569 template <typename T>
570 std::vector<std::basic_string<T> > split(const std::basic_string<T> &s, T delim)
572 std::vector<std::basic_string<T> > tokens;
574 std::basic_string<T> current;
575 bool last_was_escape = false;
576 for (size_t i = 0; i < s.length(); i++) {
578 if (last_was_escape) {
581 last_was_escape = false;
584 tokens.push_back(current);
585 current = std::basic_string<T>();
586 last_was_escape = false;
587 } else if (si == '\\') {
588 last_was_escape = true;
591 last_was_escape = false;
596 tokens.push_back(current);
602 * Checks that all characters in \p to_check are a decimal digits.
605 * @return true if to_check is not empty and all characters in to_check are
606 * decimal digits, otherwise false
608 inline bool is_number(const std::string &to_check)
610 for (char i : to_check)
611 if (!std::isdigit(i))
614 return !to_check.empty();
619 * Returns a C-string, either "true" or "false", corresponding to \p val.
621 * @return If \p val is true, then "true" is returned, otherwise "false".
623 inline const char *bool_to_cstr(bool val)
625 return val ? "true" : "false";
628 inline const std::string duration_to_string(int sec)
635 std::stringstream ss;