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/* Copyright (c) 2008-2022 the MRtrix3 contributors.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Covered Software is provided under this License on an "as is"
* basis, without warranty of any kind, either expressed, implied, or
* statutory, including, without limitation, warranties that the
* Covered Software is free of defects, merchantable, fit for a
* particular purpose or non-infringing.
* See the Mozilla Public License v. 2.0 for more details.
*
* For more details, see http://www.mrtrix.org/.
*/
#include "mrtrix.h"
namespace MR
{
/************************************************************************
* Miscellaneous functions *
************************************************************************/
vector<default_type> parse_floats (const std::string& spec)
{
vector<default_type> V;
if (!spec.size()) throw Exception ("floating-point sequence specifier is empty");
std::string::size_type start = 0, end;
default_type range_spec[3];
int i = 0;
try {
do {
end = spec.find_first_of (",:", start);
std::string sub (spec.substr (start, end-start));
range_spec[i] = (sub.empty() || sub == "nan") ? NAN : to<default_type> (sub);
char last_char = end < spec.size() ? spec[end] : '\0';
if (last_char == ':') {
i++;
if (i > 2) throw Exception ("invalid number range in number sequence \"" + spec + "\"");
} else {
if (i) {
if (i != 2)
throw Exception ("For floating-point ranges, must specify three numbers (start:step:end)");
default_type first = range_spec[0], inc = range_spec[1], last = range_spec[2];
if (!inc || (inc * (last-first) < 0.0) || !std::isfinite(first) || !std::isfinite(inc) || !std::isfinite(last))
throw Exception ("Floating-point range does not form a finite set");
default_type value = first;
for (size_t mult = 0; (inc>0.0f ? value < last - 0.5f*inc : value > last + 0.5f*inc); ++mult)
V.push_back ((value = first + (mult * inc)));
} else {
V.push_back (range_spec[0]);
}
i = 0;
}
start = end+1;
} while (end < spec.size());
}
catch (Exception& E) {
throw Exception (E, "can't parse floating-point sequence specifier \"" + spec + "\"");
}
return (V);
}
vector<std::string> split (const std::string& string, const char* delimiters, bool ignore_empty_fields, size_t num)
{
vector<std::string> V;
if (!string.size())
return V;
std::string::size_type start = 0, end;
try {
if (ignore_empty_fields)
start = string.find_first_not_of (delimiters);
do {
end = string.find_first_of (delimiters, start);
V.push_back (string.substr (start, end-start));
if (end >= string.size()) break;
start = ignore_empty_fields ? string.find_first_not_of (delimiters, end+1) : end+1;
if (start > string.size()) break;
if (V.size()+1 >= num) {
V.push_back (string.substr (start));
break;
}
} while (true);
}
catch (...) {
throw Exception ("can't split string \"" + string + "\"");
}
return V;
}
namespace {
// from https://www.geeksforgeeks.org/wildcard-character-matching/
inline bool __match (const char* first, const char* second)
{
// If we reach at the end of both strings, we are done
if (*first == '\0' && *second == '\0')
return true;
// Make sure that the characters after '*' are present
// in second string. This function assumes that the first
// string will not contain two consecutive '*'
if (*first == '*' && *(first+1) != '\0' && *second == '\0')
return false;
// If the first string contains '?', or current characters
// of both strings match
if (*first == '?' || *first == *second)
return match(first+1, second+1);
// If there is *, then there are two possibilities
// a) We consider current character of second string
// b) We ignore current character of second string.
if (*first == '*')
return match(first+1, second) || match(first, second+1);
return false;
}
}
bool match (const std::string& pattern, const std::string& text, bool ignore_case)
{
if (ignore_case)
return __match (lowercase(pattern).c_str(), lowercase (text).c_str());
else
return __match (pattern.c_str(), text.c_str());
}
}
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