mirror of
https://github.com/oxen-io/oxen-core.git
synced 2023-12-14 02:22:56 +01:00
48a0dc9eef
- Adds a tools::trim that operates on a string_view to replace boost string trim usage. - Replaces some boost::split's with tools::split's - updates vercmp to operate on string_views instead of c strings
78 lines
2.1 KiB
C++
78 lines
2.1 KiB
C++
#include "string_util.h"
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#include <cassert>
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namespace tools {
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using namespace std::literals;
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std::vector<std::string_view> split(std::string_view str, const std::string_view delim, bool trim)
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{
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std::vector<std::string_view> results;
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// Special case for empty delimiter: splits on each character boundary:
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if (delim.empty())
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{
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results.reserve(str.size());
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for (size_t i = 0; i < str.size(); i++)
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results.emplace_back(str.data() + i, 1);
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return results;
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}
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for (size_t pos = str.find(delim); pos != std::string_view::npos; pos = str.find(delim))
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{
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if (!trim || !results.empty() || pos > 0)
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results.push_back(str.substr(0, pos));
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str.remove_prefix(pos + delim.size());
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}
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if (!trim || str.size())
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results.push_back(str);
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else
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while (!results.empty() && results.back().empty())
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results.pop_back();
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return results;
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}
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std::vector<std::string_view> split_any(std::string_view str, const std::string_view delims, bool trim)
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{
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if (delims.empty())
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return split(str, delims);
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std::vector<std::string_view> results;
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for (size_t pos = str.find_first_of(delims); pos != std::string_view::npos; pos = str.find_first_of(delims))
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{
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if (!trim || !results.empty() || pos > 0)
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results.push_back(str.substr(0, pos));
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size_t until = str.find_first_not_of(delims, pos+1);
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if (until == std::string_view::npos)
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str.remove_prefix(str.size());
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else
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str.remove_prefix(until);
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}
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if (!trim || str.size())
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results.push_back(str);
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else
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while (!results.empty() && results.back().empty())
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results.pop_back();
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return results;
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}
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void trim(std::string_view& s)
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{
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constexpr auto simple_whitespace = " \t\r\n"sv;
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auto pos = s.find_first_not_of(simple_whitespace);
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if (pos == std::string_view::npos) { // whole string is whitespace
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s.remove_prefix(s.size());
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return;
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}
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s.remove_prefix(pos);
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pos = s.find_last_not_of(simple_whitespace);
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assert(pos != std::string_view::npos);
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s.remove_suffix(s.size() - (pos + 1));
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}
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std::string lowercase_ascii_string(std::string src)
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{
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for (char &ch : src)
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if (ch >= 'A' && ch <= 'Z') ch = ch + ('a' - 'A');
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return src;
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}
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}
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