102 lines
3.2 KiB
C++
102 lines
3.2 KiB
C++
/*
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* MVKStrings.h
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*
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* Copyright (c) 2015-2022 The Brenwill Workshop Ltd. (http://www.brenwill.com)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __MVKStrings_h_
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#define __MVKStrings_h_ 1
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#include <string>
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#include <streambuf>
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namespace mvk {
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#pragma mark -
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#pragma mark Strings
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static std::string _mvkDefaultWhitespaceChars = " \f\n\r\t\v";
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/** Returns a string with whitespace trimmed from the right end of the specified string. */
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inline std::string trim_right(const std::string& s, const std::string& delimiters = _mvkDefaultWhitespaceChars) {
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size_t endPos = s.find_last_not_of(delimiters);
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return (endPos != std::string::npos) ? s.substr(0, endPos + 1) : "";
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}
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/** Returns a string with whitespace trimmed from the left end of the specified string. */
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inline std::string trim_left(const std::string& s, const std::string& delimiters = _mvkDefaultWhitespaceChars) {
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size_t startPos = s.find_first_not_of(delimiters);
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return (startPos != std::string::npos) ? s.substr(startPos) : "";
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}
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/** Returns a string with whitespace trimmed from both ends of the specified string. */
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inline std::string trim(const std::string& s, const std::string& delimiters = _mvkDefaultWhitespaceChars) {
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size_t startPos = s.find_first_not_of(delimiters);
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size_t endPos = s.find_last_not_of(delimiters);
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return ( (startPos != std::string::npos) && (endPos != std::string::npos) ) ? s.substr(startPos, endPos + 1) : "";
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}
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/** Cleanse variable name by replacing any illegal chars and leading digit with underscores. */
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inline std::string cleanseVarName(const std::string& name) {
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std::string varName(name);
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size_t cCnt = varName.length();
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for (size_t cIdx = 0; cIdx < cCnt; cIdx++) {
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char& c = varName[cIdx];
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if ( !(c == '_' || isalpha(c) || (isdigit(c) && cIdx > 0)) ) { c = '_'; }
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}
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return varName;
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}
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#pragma mark -
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#pragma mark Streams
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/** A memory-based stream buffer. */
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class membuf : public std::streambuf {
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public:
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membuf(char* p, size_t n) {
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setg(p, p, p + n);
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setp(p, p + n);
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}
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};
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/** A character counting stream buffer. */
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class countbuf : public std::streambuf {
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public:
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size_t buffSize = 0;
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private:
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std::streamsize xsputn (const char* /* s */, std::streamsize n) override {
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buffSize += n;
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return n;
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}
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};
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/** A stream buffer underpinned by a vector<char>. */
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class charvectorbuf : public std::streambuf {
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public:
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charvectorbuf(std::vector<char>* pVec) : _pVec(pVec) {}
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private:
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std::streamsize xsputn (const char* s, std::streamsize n) override {
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_pVec->insert(_pVec->end(), s, s + n);
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return n;
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}
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std::vector<char>* _pVec;
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};
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}
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#endif
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