360 lines
12 KiB
Plaintext
360 lines
12 KiB
Plaintext
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/* -*-c++-*- */
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/* osgEarth - Geospatial SDK for OpenSceneGraph
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* Copyright 2020 Pelican Mapping
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* http://osgearth.org
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*
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* osgEarth is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#ifndef OSGEARTH_STRING_UTILS_H
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#define OSGEARTH_STRING_UTILS_H 1
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#include <osgEarth/Common>
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#include <osg/Vec3>
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#include <osg/Vec3d>
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#include <osg/Vec4>
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#include <osg/Vec4ub>
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#include <string>
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#include <algorithm>
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#include <vector>
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#include <sstream>
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#include <locale>
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#include <iomanip>
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#include <map>
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#include <unordered_map>
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#include <set>
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#include <cctype>
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namespace osgEarth { namespace Util
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{
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extern OSGEARTH_EXPORT const std::string EMPTY_STRING;
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using StringVector = std::vector<std::string>;
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using StringSet = std::set<std::string>;
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using StringTable = std::unordered_map<std::string, std::string>;
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/** Replaces all the instances of "pattern" with "replacement" in "in_out" */
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extern OSGEARTH_EXPORT std::string& replaceIn(
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std::string& in_out,
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const std::string& pattern,
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const std::string& replacement );
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/** Replaces all the instances of "pattern" with "replacement" in "in_out" (case-insensitive) */
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extern OSGEARTH_EXPORT std::string& ciReplaceIn(
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std::string& in_out,
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const std::string& pattern,
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const std::string& replacement );
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/**
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* Trims whitespace from the ends of a string.
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*/
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extern OSGEARTH_EXPORT std::string trim( const std::string& in );
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/**
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* Trims whitespace from the ends of a string; in-place modification on the string to reduce string copies.
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*/
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extern OSGEARTH_EXPORT void trim2( std::string& str );
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//! Removes leading and trailing whitespace, and replaces all other
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//! whitespace with single spaces
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extern OSGEARTH_EXPORT std::string trimAndCompress(const std::string& in);
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/**
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* True is "ref" starts with "pattern"
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*/
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extern OSGEARTH_EXPORT bool startsWith(
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const std::string& ref,
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const std::string& pattern,
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bool caseSensitive =true,
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const std::locale& locale =std::locale() );
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/**
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* True is "ref" ends with "pattern"
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*/
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extern OSGEARTH_EXPORT bool endsWith(
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const std::string& ref,
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const std::string& pattern,
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bool caseSensitive =true,
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const std::locale& locale =std::locale() );
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/**
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* Case-insensitive compare
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*/
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extern OSGEARTH_EXPORT bool ciEquals(
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const std::string& lhs,
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const std::string& rhs,
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const std::locale& local = std::locale() );
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/**
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* Case-insensitive STL comparator
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*/
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inline bool ci_char_equals(char c1, char c2) {
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return std::tolower(c1) == std::tolower(c2);
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}
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inline bool ci_equals(const std::string& lhs, const std::string& rhs) {
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return (lhs.size() == rhs.size()) &&
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std::equal(lhs.begin(), lhs.end(), rhs.begin(), ci_char_equals);
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}
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struct ci_string_less {
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bool operator()(const std::string& lhs, const std::string& rhs) const {
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for(size_t i=0; i<std::min(lhs.size(), rhs.size()); ++i) {
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if (std::tolower(lhs[i]) < std::tolower(rhs[i])) return true;
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if (std::tolower(lhs[i]) > std::tolower(rhs[i])) return false;
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}
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return lhs.size() < rhs.size();
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}
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};
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extern OSGEARTH_EXPORT std::string joinStrings( const StringVector& input, char delim );
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/** Returns a lower-case version of the input string. */
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extern OSGEARTH_EXPORT std::string toLower( const std::string& input );
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/** Parses a color string in the form "255 255 255 255" (r g b a [0..255]) into an OSG color. */
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extern OSGEARTH_EXPORT osg::Vec4ub stringToColor(const std::string& str, osg::Vec4ub default_value);
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/** Creates a string in the form "255 255 255 255" (r g b a [0..255]) from a color */
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extern OSGEARTH_EXPORT std::string colorToString( const osg::Vec4ub& c );
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/** Converts a string to a vec3f */
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extern OSGEARTH_EXPORT osg::Vec3f stringToVec3f( const std::string& str, const osg::Vec3f& default_value );
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/** Converts a vec3f to a string */
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extern OSGEARTH_EXPORT std::string vec3fToString( const osg::Vec3f& v );
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/** Parses an HTML color ("#rrggbb" or "#rrggbbaa") into an OSG color. */
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extern OSGEARTH_EXPORT osg::Vec4f htmlColorToVec4f( const std::string& html );
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/** Makes an HTML color ("#rrggbb" or "#rrggbbaa") from an OSG color. */
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extern OSGEARTH_EXPORT std::string vec4fToHtmlColor( const osg::Vec4f& c );
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/** Makes a valid filename out of a string */
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extern OSGEARTH_EXPORT std::string toLegalFileName( const std::string& input, bool allowSubdir=false, const char* replacementChar=NULL);
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/** Generates a hashed integer for a string (poor man's MD5) */
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extern OSGEARTH_EXPORT unsigned hashString( const std::string& input );
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/** Same as hashString but returns a string value. */
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extern OSGEARTH_EXPORT std::string hashToString(const std::string& input);
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/**
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* Gets the total number of seconds formatted as H:M:S
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*/
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extern OSGEARTH_EXPORT std::string prettyPrintTime( double seconds );
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/**
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* Gets a pretty printed version of the given size in MB.
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*/
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extern OSGEARTH_EXPORT std::string prettyPrintSize( double mb );
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//! Extract the "i-th" token from a delimited string
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extern OSGEARTH_EXPORT std::string getToken(const std::string& input, unsigned i, const std::string& delims=",");
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//------------------------------------------------------------------------
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// conversion templates
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// converts a string to primitive using serialization
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template<typename T> inline T
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as( const std::string& str, const T& default_value )
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{
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T temp = default_value;
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std::istringstream strin( str );
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if ( !strin.eof() ) strin >> temp;
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return temp;
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}
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// template specialization for integers (to handle hex)
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#define AS_INT_DEC_OR_HEX(TYPE) \
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template<> inline TYPE \
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as< TYPE >(const std::string& str, const TYPE & dv) { \
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TYPE temp = dv; \
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std::istringstream strin( trim(str) ); \
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if ( !strin.eof() ) { \
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if ( str.length() >= 2 && str[0] == '0' && str[1] == 'x' ) { \
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strin.seekg( 2 ); \
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strin >> std::hex >> temp; \
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} \
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else { \
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strin >> temp; \
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} \
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} \
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return temp; \
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}
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AS_INT_DEC_OR_HEX(int)
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AS_INT_DEC_OR_HEX(unsigned)
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AS_INT_DEC_OR_HEX(short)
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AS_INT_DEC_OR_HEX(unsigned short)
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AS_INT_DEC_OR_HEX(long)
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AS_INT_DEC_OR_HEX(unsigned long)
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// template specialization for a bool
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template<> inline bool
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as<bool>( const std::string& str, const bool& default_value )
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{
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std::string temp = toLower(str);
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return
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temp == "true" || temp == "yes" || temp == "on" ? true :
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temp == "false" || temp == "no" || temp == "off" ? false :
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default_value;
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}
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template<> inline osg::Vec3f
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as<osg::Vec3f>( const std::string& str, const osg::Vec3f& default_value )
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{
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return stringToVec3f(str, default_value);
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}
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// template specialization for string
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template<> inline std::string
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as<std::string>( const std::string& str, const std::string& default_value )
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{
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return str;
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}
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// snips a substring and parses it.
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template<typename T> inline bool
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as(const std::string& in, unsigned start, unsigned len, T default_value)
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{
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std::string buf;
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std::copy( in.begin()+start, in.begin()+start+len, std::back_inserter(buf) );
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return as<T>(buf, default_value);
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}
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// converts a primitive to a string
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template<typename T> inline std::string
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toString(const T& value)
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{
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std::stringstream out;
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//out << std::setprecision(20) << std::fixed << value;
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out << std::setprecision(20) << value;
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std::string outStr;
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outStr = out.str();
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return outStr;
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}
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// template speciallization for a bool to print out "true" or "false"
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template<> inline std::string
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toString<bool>(const bool& value)
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{
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return value ? "true" : "false";
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}
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template<> inline std::string
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toString<osg::Vec3f>(const osg::Vec3f& value)
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{
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return vec3fToString(value);
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}
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/**
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* Assembles and returns an inline string using a stream-like << operator.
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* Example:
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* std::string str = Stringify() << "Hello, world " << variable;
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*/
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struct Stringify
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{
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operator std::string () const
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{
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std::string result;
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result = buf.str();
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return result;
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}
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template<typename T>
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Stringify& operator << (const T& val) { buf << val; return (*this); }
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Stringify& operator << (const Stringify& val) { buf << (std::string)val; return (*this); }
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protected:
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std::stringstream buf;
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};
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template<> inline
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Stringify& Stringify::operator << <bool>(const bool& val) { buf << (val ? "true" : "false"); return (*this); }
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template<> inline
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Stringify& Stringify::operator << <osg::Vec3f>(const osg::Vec3f& val) {
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buf << val.x() << " " << val.y() << " " << val.z(); return (*this); }
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template<> inline
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Stringify& Stringify::operator << <osg::Vec3d>(const osg::Vec3d& val ) {
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buf << val.x() << " " << val.y() << " " << val.z(); return (*this); }
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template<> inline
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Stringify& Stringify::operator << <osg::Vec4f>(const osg::Vec4f& val) {
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buf << val.r() << " " << val.g() << " " << val.b() << " " << val.a(); return (*this); }
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/**
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* Splits a string up into a vector of strings based on a set of
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* delimiters, quotes, and rules.
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*/
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class OSGEARTH_EXPORT StringTokenizer
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{
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public:
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StringTokenizer(
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const std::string& delims =" \t\r\n",
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const std::string& quotes ="'\"" );
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StringTokenizer(
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const std::string& input,
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StringVector& output,
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const std::string& delims =" \t\r\n",
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const std::string& quotes ="'\"",
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bool keepEmpties =true,
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bool trimTokens =true);
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StringTokenizer(
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const std::string& input,
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StringTable& output,
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const std::string& delims = " \t\r\n",
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const std::string& keypairseparators = "=",
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const std::string& quotes = "'\"",
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bool keepEmpties = true,
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bool trimTokens = true);
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void tokenize( const std::string& input, StringVector& output ) const;
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bool& keepEmpties() { return _allowEmpties; }
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bool& trimTokens() { return _trimTokens; }
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void addDelim( char delim, bool keepAsToken =false );
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void addDelims( const std::string& delims, bool keepAsTokens =false );
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void addQuote( char delim, bool keepInToken =false );
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void addQuotes( const std::string& delims, bool keepInTokens =false );
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private:
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using TokenMap = std::map<char,bool>;
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TokenMap _delims;
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TokenMap _quotes;
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bool _allowEmpties;
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bool _trimTokens;
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};
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} }
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namespace osgEarth
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{
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namespace Strings = osgEarth::Util;
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}
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#endif // OSGEARTH_STRING_UTILS_H
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