4 * This file is part of LyX, the document processor.
5 * Licence details can be found in the file COPYING.
7 * \author Lars Gullik Bjønnes
8 * \author Jean-Marc Lasgouttes
10 * Full author contact details are available in file CREDITS.
12 * A collection of string helper functions that works with string.
13 * Some of these would certainly benefit from a rewrite/optimization.
19 #include "support/docstring.h"
28 /// Compare \p s and \p s2, ignoring the case.
29 /// Does not depend on the locale.
30 int compare_no_case(docstring const & s, docstring const & s2);
32 /// Compare \p s and \p s2, ignoring the case of ASCII characters only.
33 int compare_ascii_no_case(std::string const & s, std::string const & s2);
35 /// Compare \p s and \p s2, ignoring the case of ASCII characters only.
36 int compare_ascii_no_case(docstring const & s, docstring const & s2);
39 bool isStrInt(std::string const & str);
41 /// does the std::string represent an unsigned integer value ?
42 bool isStrUnsignedInt(std::string const & str);
45 bool isStrDbl(std::string const & str);
47 /// does the string contain a digit?
48 bool hasDigitASCII(docstring const & str);
50 bool isHexChar(char_type);
52 bool isHex(docstring const & str);
54 int hexToInt(docstring const & str);
56 /// is \p str pure ascii?
57 bool isAscii(docstring const & str);
59 /// is \p str pure ascii?
60 bool isAscii(std::string const & str);
63 * Changes the case of \p c to lowercase.
64 * Don't use this for non-ASCII characters, since it depends on the locale.
65 * This overloaded function is only implemented because the char_type variant
66 * would be used otherwise, and we assert in this function that \p c is in
69 char lowercase(char c);
72 * Changes the case of \p c to uppercase.
73 * Don't use this for non-ASCII characters, since it depends on the locale.
74 * This overloaded function is only implemented because the char_type variant
75 * would be used otherwise, and we assert in this function that \p c is in
78 char uppercase(char c);
80 /// Changes the case of \p c to lowercase.
81 /// Does not depend on the locale.
82 char_type lowercase(char_type c);
84 /// Changes the case of \p c to uppercase.
85 /// Does not depend on the locale.
86 char_type uppercase(char_type c);
88 /// Checks if the supplied character is lower-case
89 bool isLowerCase(char_type ch);
91 /// Checks if the supplied character is upper-case
92 bool isUpperCase(char_type ch);
94 /// same as lowercase(), but ignores locale
95 std::string const ascii_lowercase(std::string const &);
96 docstring const ascii_lowercase(docstring const &);
98 /// Changes the case of \p s to lowercase.
99 /// Does not depend on the locale.
100 docstring const lowercase(docstring const & s);
102 /// Changes the case of \p s to uppercase.
103 /// Does not depend on the locale.
104 docstring const uppercase(docstring const & s);
106 /// Returns the superscript of \p c or \p c if no superscript exists.
107 /// Does not depend on the locale.
108 char_type superscript(char_type c);
110 /// Returns the subscript of \p c or \p c if no subscript exists.
111 /// Does not depend on the locale.
112 char_type subscript(char_type c);
114 /// Does str start with c?
115 bool prefixIs(docstring const & str, char_type c);
117 /// Does str start with pre?
118 bool prefixIs(std::string const & str, std::string const & pre);
119 bool prefixIs(docstring const & str, docstring const & pre);
121 /// Does the string end with this char?
122 bool suffixIs(std::string const &, char);
123 bool suffixIs(docstring const &, char_type);
125 /// Does the string end with this suffix?
126 bool suffixIs(std::string const &, std::string const &);
127 bool suffixIs(docstring const &, docstring const &);
129 /// Is b contained in a?
130 inline bool contains(std::string const & a, std::string const & b)
132 return a.find(b) != std::string::npos;
135 inline bool contains(docstring const & a, docstring const & b)
137 return a.find(b) != docstring::npos;
140 inline bool contains(std::string const & a, char b)
142 return a.find(b) != std::string::npos;
145 inline bool contains(docstring const & a, char_type b)
147 return a.find(b) != docstring::npos;
151 bool containsOnly(std::string const &, std::string const &);
153 /** Extracts a token from this string at the nth delim.
154 Doesn't modify the original string. Similar to strtok.
157 token("a;bc;d", ';', 1) == "bc";
158 token("a;bc;d", ';', 2) == "d";
161 std::string const token(std::string const & a, char delim, int n);
163 docstring const token(docstring const & a, char_type delim, int n);
165 /** Search a token in this string using the delim.
166 Doesn't modify the original string. Returns -1 in case of
170 tokenPos("a;bc;d", ';', "bc") == 1;
171 tokenPos("a;bc;d", ';', "d") == 2;
174 int tokenPos(std::string const & a, char delim, std::string const & tok);
175 int tokenPos(docstring const & a, char_type delim, docstring const & tok);
178 /// Substitute all \a oldchar with \a newchar
179 std::string const subst(std::string const & a, char oldchar, char newchar);
181 /// Substitute all \a oldchar with \a newchar
182 docstring const subst(docstring const & a, char_type oldchar, char_type newchar);
184 /// substitutes all instances of \a oldstr with \a newstr
185 std::string const subst(std::string const & a,
186 std::string const & oldstr, std::string const & newstr);
188 /// substitutes all instances of \a oldstr with \a newstr
189 docstring const subst(docstring const & a,
190 docstring const & oldstr, docstring const & newstr);
192 /// Count all occurences of char \a chr inside \a str
193 int count_char(docstring const & str, docstring::value_type chr);
195 /** Trims characters off the end and beginning of a string.
197 trim("ccabccc", "c") == "ab".
200 docstring const trim(docstring const & a, char const * p = " ");
202 /** Trims characters off the end and beginning of a string.
204 trim("ccabccc", "c") == "ab".
207 std::string const trim(std::string const & a, char const * p = " ");
209 /** Trims characters off the end of a string, removing any character
212 rtrim("abcde", "dec") == "ab".
215 std::string const rtrim(std::string const & a, char const * p = " ");
216 docstring const rtrim(docstring const & a, char const * p = " ");
218 /** Trims characters off the beginning of a string.
220 ("abbabcdef", "ab") = "cdef"
223 std::string const ltrim(std::string const & a, char const * p = " ");
224 docstring const ltrim(docstring const & a, char const * p = " ");
226 /** Splits the string given in the first argument at the first occurence
227 of the third argument, delim.
228 What precedes delim is returned in the second argument, piece; this
229 will be the whole of the string if no delimiter is found.
230 The return value is what follows delim, if anything. So the return
231 value is the null string if no delimiter is found.
235 ret = split(s1, s2, ';') -> ret = "bc", s2 == "a"
238 std::string const split(std::string const & a, std::string & piece, char delim);
239 docstring const split(docstring const & a, docstring & piece, char_type delim);
241 /// Same as split but does not return a piece
242 std::string const split(std::string const & a, char delim);
244 /// Same as split but uses the last delim.
245 std::string const rsplit(std::string const & a, std::string & piece, char delim);
246 docstring const rsplit(docstring const & a, char_type delim);
248 /// Escapes non ASCII chars and other problematic characters that cause
249 /// problems in latex labels.
250 docstring const escape(docstring const & lab);
252 /// Word-wraps the provided docstring, returning a line-broken string
253 /// of width no wider than width, with the string broken at spaces.
254 /// If the string cannot be broken appropriately, it returns something
255 /// with "..." at the end, again no wider than width.
256 /// We assume here that str does not contain newlines.
257 /// If indent is positive, then the first line is indented that many
258 /// spaces. If it is negative, then successive lines are indented, as
259 /// if the first line were "outdented".
260 docstring wrap(docstring const & str, int const indent = 0,
261 size_t const width = 80);
263 /// Like the preceding, except it is intended to operate on strings
264 /// that may contain embedded newlines.
265 /// \param numlines Don't return more than numlines lines. If numlines
266 /// is 0, we return everything.
267 docstring wrapParas(docstring const & str, int const indent = 0,
268 size_t const width = 80, size_t const maxlines = 10);
270 /// gives a vector of stringparts which have the delimiter delim
271 /// If \p keepempty is true, empty strings will be pushed to the vector as well
272 std::vector<std::string> const getVectorFromString(std::string const & str,
273 std::string const & delim = std::string(","),
274 bool keepempty = false);
275 std::vector<docstring> const getVectorFromString(docstring const & str,
276 docstring const & delim = from_ascii(","), bool keepempty = false);
278 /// the same vice versa
279 std::string const getStringFromVector(std::vector<std::string> const & vec,
280 std::string const & delim = std::string(","));
281 docstring const getStringFromVector(std::vector<docstring> const & vec,
282 docstring const & delim = from_ascii(","));
284 /// Search \p search_token in \p str and return the position if it is
285 /// found, else -1. The last item in \p str must be "".
286 int findToken(char const * const str[], std::string const & search_token);
288 template <class Arg1>
289 docstring bformat(docstring const & fmt, Arg1);
291 template <class Arg1, class Arg2>
292 docstring bformat(docstring const & fmt, Arg1, Arg2);
294 template <class Arg1, class Arg2, class Arg3>
295 docstring bformat(docstring const & fmt, Arg1, Arg2, Arg3);
297 template <class Arg1, class Arg2, class Arg3, class Arg4>
298 docstring bformat(docstring const & fmt, Arg1, Arg2, Arg3, Arg4);
301 template<> docstring bformat(docstring const & fmt, int arg1);
302 template<> docstring bformat(docstring const & fmt, long arg1);
303 template<> docstring bformat(docstring const & fmt, unsigned int arg1);
304 template<> docstring bformat(docstring const & fmt, docstring arg1);
305 template<> docstring bformat(docstring const & fmt, char * arg1);
306 template<> docstring bformat(docstring const & fmt, docstring arg1, docstring arg2);
307 template<> docstring bformat(docstring const & fmt, docstring arg1, int arg2);
308 template<> docstring bformat(docstring const & fmt, char const * arg1, docstring arg2);
309 template<> docstring bformat(docstring const & fmt, int arg1, int arg2);
310 template<> docstring bformat(docstring const & fmt, docstring arg1, docstring arg2, docstring arg3);
311 template<> docstring bformat(docstring const & fmt, docstring arg1, docstring arg2, docstring arg3, docstring arg4);
314 } // namespace support