string_view_utils.cpp File Reference

#include "string_view_utils.hpp"

Include dependency graph for string_view_utils.cpp:

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Functions
std::string_view	tokenize (std::string_view &str, char delim, char quot)
	Tokenizer for string_view.

Function Documentation

tokenize()

std::string_view tokenize	(	std::string_view &	str,
		char	delim,
		char	quot = '\0' )

Tokenizer for string_view.

Useful for non-destructive tokenization of strings. Skips empty tokens. str is modified to view the not yet processed remainder.

Typical usage (prints lines "Hello", "World", "!"):

std::string_view sv = ":::Hello:World::!::";
while(!sv.empty()){
    cout << tokenize(sv, ':') << "\n";
}

The 'quot' param allows for a basic quotation based deilimiter escape, however the whole token must be escaped. i.e. sync:"opts=a=1:b=2":fs is fine, but sync:opts="a=1:b=2":fs is not.

Definition at line 3 of file string_view_utils.cpp.

                                                                   {
        if(str.empty())
                return {};
 
        bool escaped = false;
 
        auto token_begin = str.begin();
        while(token_begin != str.end()){
                if(*token_begin == quot)
                        escaped = !escaped;
                else if(*token_begin != delim)
                        break;
 
                token_begin++;
        }
 
        auto token_end = token_begin;
        while(token_end != str.end()){
                if(*token_end == quot){
                        str = std::string_view(token_end, str.end() - token_end);
                        str.remove_prefix(1); //remove the end quote
                        return std::string_view(token_begin, token_end - token_begin);
                }
                else if(*token_end == delim && !escaped)
                        break;
 
                token_end++;
        }
 
        str = std::string_view(token_end, str.end() - token_end);
 
        return std::string_view(token_begin, token_end - token_begin);
}

Referenced by audio_frame2_resampler::audio_frame2_resampler(), image_pattern_diagonal::image_pattern_diagonal(), image_pattern_text::image_pattern_text(), audio_cap_pipewire_init(), audio_init(), audio_play_pw_init(), display_conference_init(), display_conference_worker(), display_drm_init(), display_multiplier_init(), display_pw_init(), display_unix_sock_init(), Filter_chain::emplace_new(), init(), parse_cfg(), parse_cfg(), parse_holepunch_conf(), BandwidthWidget::parseLine(), RecvLossWidget::parseLine(), VuMeterWidget::parseLine(), print_capabilities(), and AvailableSettings::queryProcessLine().