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string_view splits, with sv variants for returning vectors of views into the string_view

v1
Brett 2024-02-08 14:08:09 -05:00
parent cf27247eb4
commit c89aa61cca
1 changed files with 48 additions and 12 deletions
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60
include/blt/std/string.h
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@ -216,31 +216,67 @@ namespace blt::string
// taken from https://stackoverflow.com/questions/14265581/parse-split-a-string-in-c-using-string-delimiter-standard-c
// extended to return a vector
static inline BLT_CPP20_CONSTEXPR std::vector<std::string> split(std::string s, std::string_view delim)
static inline BLT_CPP20_CONSTEXPR std::vector<std::string> split(std::string_view s, std::string_view delim)
{
size_t pos = 0;
size_t from = 0;
std::vector<std::string> tokens;
while ((pos = s.find(delim)) != std::string::npos)
while ((pos = s.find(delim, from)) != std::string::npos)
{
auto token = s.substr(0, pos);
tokens.push_back(token);
s.erase(0, pos + delim.length());
auto size = pos - from;
auto token = s.substr(from, size);
tokens.emplace_back(token);
from += size + delim.length();
}
tokens.push_back(std::move(s));
tokens.emplace_back(s.substr(from));
return tokens;
}
static inline BLT_CPP20_CONSTEXPR std::vector<std::string> split(std::string s, char delim)
static inline BLT_CPP20_CONSTEXPR std::vector<std::string> split(std::string_view s, char delim)
{
size_t pos = 0;
size_t from = 0;
std::vector<std::string> tokens;
while ((pos = s.find(delim)) != std::string::npos)
while ((pos = s.find(delim, from)) != std::string::npos)
{
auto token = s.substr(0, pos);
tokens.push_back(token);
s.erase(0, pos + 1);
auto size = pos - from;
auto token = s.substr(from, size);
tokens.emplace_back(token);
from += size + 1;
}
tokens.push_back(s);
tokens.emplace_back(s.substr(from));
return tokens;
}
static inline BLT_CPP20_CONSTEXPR std::vector<std::string_view> split_sv(std::string_view s, std::string_view delim)
{
size_t pos = 0;
size_t from = 0;
std::vector<std::string_view> tokens;
while ((pos = s.find(delim, from)) != std::string::npos)
{
auto size = pos - from;
auto token = s.substr(from, size);
tokens.push_back(token);
from += size + delim.length();
}
tokens.push_back(s.substr(from));
return tokens;
}
static inline BLT_CPP20_CONSTEXPR std::vector<std::string_view> split_sv(std::string_view s, char delim)
{
size_t pos = 0;
size_t from = 0;
std::vector<std::string_view> tokens;
while ((pos = s.find(delim, from)) != std::string::npos)
{
auto size = pos - from;
auto token = s.substr(from, size);
tokens.push_back(token);
from += size + 1;
}
tokens.push_back(s.substr(from));
return tokens;
}