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37 * Implements functions and classes in stringutil.h.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
40 * \ingroup module_utility
44 #include "stringutil.h"
55 #include "gromacs/utility/gmxassert.h"
60 bool endsWith(const std::string &str, const char *suffix)
62 if (suffix == NULL || suffix[0] == '\0')
66 size_t length = std::strlen(suffix);
67 return (str.length() >= length
68 && str.compare(str.length() - length, length, suffix) == 0);
71 std::string stripSuffixIfPresent(const std::string &str, const char *suffix)
75 size_t suffixLength = std::strlen(suffix);
76 if (suffixLength > 0 && endsWith(str, suffix))
78 return str.substr(0, str.length() - suffixLength);
84 std::string stripString(const std::string &str)
86 std::string::const_iterator start = str.begin();
87 std::string::const_iterator end = str.end();
88 while (start != end && std::isspace(*start))
92 while (start != end && std::isspace(*(end - 1)))
96 return std::string(start, end);
99 std::string formatString(const char *fmt, ...)
102 char staticBuf[1024];
104 std::vector<char> dynamicBuf;
105 char *buf = staticBuf;
107 // TODO: There may be a better way of doing this on Windows, Microsoft
108 // provides their own way of doing things...
112 int n = vsnprintf(buf, length, fmt, ap);
114 if (n > -1 && n < length)
116 std::string result(buf);
127 dynamicBuf.resize(length);
128 buf = &dynamicBuf[0];
132 std::vector<std::string> splitString(const std::string &str)
134 std::vector<std::string> result;
135 std::string::const_iterator currPos = str.begin();
136 const std::string::const_iterator end = str.end();
137 while (currPos != end)
139 while (currPos != end && std::isspace(*currPos))
143 const std::string::const_iterator startPos = currPos;
144 while (currPos != end && !std::isspace(*currPos))
150 result.push_back(std::string(startPos, currPos));
156 std::string concatenateStrings(const char *const *sarray, size_t count)
160 for (size_t i = 0; i < count && sarray[i] != NULL; ++i)
162 if (sarray[i][0] != '\0')
164 result.append(sarray[i]);
165 char lastchar = sarray[i][std::strlen(sarray[i])-1];
166 if (!std::isspace(lastchar))
172 result.resize(result.find_last_not_of(" \n\r\t") + 1);
180 * Helper function to identify word boundaries for replaceAllWords().
182 * \returns `true` if the character is considered part of a word.
184 * \ingroup module_utility
186 bool isWordChar(char c)
188 return std::isalnum(c) || c == '-' || c == '_';
192 * Common implementation for string replacement functions.
194 * \param[in] input Input string.
195 * \param[in] from String to find.
196 * \param[in] to String to use to replace \p from.
197 * \param[in] bWholeWords Whether to only consider matches to whole words.
198 * \returns \p input with all occurrences of \p from replaced with \p to.
199 * \throws std::bad_alloc if out of memory.
201 * \ingroup module_utility
204 replaceInternal(const std::string &input, const char *from, const char *to,
207 GMX_RELEASE_ASSERT(from != NULL && to != NULL,
208 "Replacement strings must not be NULL");
209 size_t matchLength = std::strlen(from);
212 size_t matchPos = input.find(from);
213 while (matchPos < input.length())
215 size_t matchEnd = matchPos + matchLength;
218 if (!((matchPos == 0 || !isWordChar(input[matchPos-1]))
219 && (matchEnd == input.length() || !isWordChar(input[matchEnd]))))
221 matchPos = input.find(from, matchPos + 1);
226 result.append(input, inputPos, matchPos - inputPos);
229 matchPos = input.find(from, inputPos);
231 result.append(input, inputPos, matchPos - inputPos);
238 replaceAll(const std::string &input, const char *from, const char *to)
240 return replaceInternal(input, from, to, false);
244 replaceAll(const std::string &input, const std::string &from,
245 const std::string &to)
247 return replaceInternal(input, from.c_str(), to.c_str(), false);
251 replaceAllWords(const std::string &input, const char *from, const char *to)
253 return replaceInternal(input, from, to, true);
257 replaceAllWords(const std::string &input, const std::string &from,
258 const std::string &to)
260 return replaceInternal(input, from.c_str(), to.c_str(), true);
264 /********************************************************************
265 * TextLineWrapperSettings
268 TextLineWrapperSettings::TextLineWrapperSettings()
269 : maxLength_(0), indent_(0), firstLineIndent_(-1),
270 bStripLeadingWhitespace_(true), continuationChar_('\0')
275 /********************************************************************
280 TextLineWrapper::findNextLine(const char *input, size_t lineStart) const
282 size_t inputLength = std::strlen(input);
283 bool bFirstLine = (lineStart == 0 || input[lineStart - 1] == '\n');
284 // Ignore leading whitespace if necessary.
285 if (!bFirstLine || settings_.bStripLeadingWhitespace_)
287 lineStart += std::strspn(input + lineStart, " ");
288 if (lineStart >= inputLength)
294 int indent = (bFirstLine ? settings_.firstLineIndent() : settings_.indent());
295 size_t lastAllowedBreakPoint
296 = (settings_.lineLength() > 0
297 ? std::min(lineStart + settings_.lineLength() - indent, inputLength)
299 // Ignore trailing whitespace.
300 lastAllowedBreakPoint += std::strspn(input + lastAllowedBreakPoint, " ");
301 size_t lineEnd = lineStart;
304 const char *nextBreakPtr = std::strpbrk(input + lineEnd, " \n");
306 = (nextBreakPtr != NULL ? nextBreakPtr - input : inputLength);
307 if (nextBreak > lastAllowedBreakPoint && lineEnd > lineStart)
311 lineEnd = nextBreak + 1;
313 while (lineEnd < lastAllowedBreakPoint && input[lineEnd - 1] != '\n');
314 return (lineEnd < inputLength ? lineEnd : inputLength);
318 TextLineWrapper::findNextLine(const std::string &input, size_t lineStart) const
320 return findNextLine(input.c_str(), lineStart);
324 TextLineWrapper::formatLine(const std::string &input,
325 size_t lineStart, size_t lineEnd) const
327 size_t inputLength = input.length();
328 bool bFirstLine = (lineStart == 0 || input[lineStart - 1] == '\n');
329 // Strip leading whitespace if necessary.
330 if (!bFirstLine || settings_.bStripLeadingWhitespace_)
332 lineStart = input.find_first_not_of(' ', lineStart);
333 if (lineStart >= inputLength)
335 return std::string();
338 int indent = (bFirstLine ? settings_.firstLineIndent() : settings_.indent());
339 bool bContinuation = (lineEnd < inputLength && input[lineEnd - 1] != '\n');
340 // Strip trailing whitespace.
341 while (lineEnd > lineStart && std::isspace(input[lineEnd - 1]))
346 size_t lineLength = lineEnd - lineStart;
347 std::string result(indent, ' ');
348 result.append(input, lineStart, lineLength);
349 if (bContinuation && settings_.continuationChar_ != '\0')
351 result.append(1, ' ');
352 result.append(1, settings_.continuationChar_);
358 TextLineWrapper::wrapToString(const std::string &input) const
361 size_t lineStart = 0;
362 size_t length = input.length();
363 while (lineStart < length)
365 size_t nextLineStart = findNextLine(input, lineStart);
366 result.append(formatLine(input, lineStart, nextLineStart));
367 if (nextLineStart < length
368 || (nextLineStart == length && input[length - 1] == '\n'))
372 lineStart = nextLineStart;
377 std::vector<std::string>
378 TextLineWrapper::wrapToVector(const std::string &input) const
380 std::vector<std::string> result;
381 size_t lineStart = 0;
382 size_t length = input.length();
383 while (lineStart < length)
385 size_t nextLineStart = findNextLine(input, lineStart);
386 result.push_back(formatLine(input, lineStart, nextLineStart));
387 lineStart = nextLineStart;