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/*
* MVKStrings.h
*
* Copyright (c) 2015-2021 The Brenwill Workshop Ltd. (http://www.brenwill.com)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __MVKStrings_h_
#define __MVKStrings_h_ 1
#include <string>
#include <streambuf>
namespace mvk {
#pragma mark -
#pragma mark Strings
static std::string _mvkDefaultWhitespaceChars = " \f\n\r\t\v";
/** Returns a string with whitespace trimmed from the right end of the specified string. */
inline std::string trim_right(const std::string& s, const std::string& delimiters = _mvkDefaultWhitespaceChars) {
size_t endPos = s.find_last_not_of(delimiters);
return (endPos != std::string::npos) ? s.substr(0, endPos + 1) : "";
}
/** Returns a string with whitespace trimmed from the left end of the specified string. */
inline std::string trim_left(const std::string& s, const std::string& delimiters = _mvkDefaultWhitespaceChars) {
size_t startPos = s.find_first_not_of(delimiters);
return (startPos != std::string::npos) ? s.substr(startPos) : "";
}
/** Returns a string with whitespace trimmed from both ends of the specified string. */
inline std::string trim(const std::string& s, const std::string& delimiters = _mvkDefaultWhitespaceChars) {
size_t startPos = s.find_first_not_of(delimiters);
size_t endPos = s.find_last_not_of(delimiters);
return ( (startPos != std::string::npos) && (endPos != std::string::npos) ) ? s.substr(startPos, endPos + 1) : "";
}
/** Cleanse variable name by replacing any illegal chars and leading digit with underscores. */
inline std::string cleanseVarName(const std::string& name) {
std::string varName(name);
size_t cCnt = varName.length();
for (size_t cIdx = 0; cIdx < cCnt; cIdx++) {
char& c = varName[cIdx];
if ( !(c == '_' || isalpha(c) || (isdigit(c) && cIdx > 0)) ) { c = '_'; }
}
return varName;
}
#pragma mark -
#pragma mark Streams
/** A memory-based stream buffer. */
class membuf : public std::streambuf {
public:
membuf(char* p, size_t n) {
setg(p, p, p + n);
setp(p, p + n);
}
};
/** A character counting stream buffer. */
class countbuf : public std::streambuf {
public:
size_t buffSize = 0;
private:
std::streamsize xsputn (const char* /* s */, std::streamsize n) override {
buffSize += n;
return n;
}
};
/** A stream buffer underpinned by a vector<char>. */
class charvectorbuf : public std::streambuf {
public:
charvectorbuf(std::vector<char>* pVec) : _pVec(pVec) {}
private:
std::streamsize xsputn (const char* s, std::streamsize n) override {
_pVec->insert(_pVec->end(), s, s + n);
return n;
}
std::vector<char>* _pVec;
};
}
#endif