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string view in string.h

v1
Brett 2023-12-20 14:57:17 -05:00
parent 3778408504
commit 1fed762bf8
1 changed files with 21 additions and 26 deletions
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47
include/blt/std/string.h
View File

@ -9,6 +9,7 @@
#include <iostream>
#include <string>
#include <string_view>
#include <sstream>
#include <algorithm>
#include <vector>
@ -63,66 +64,62 @@ namespace blt::string
}
};
static inline BLT_CPP20_CONSTEXPR bool starts_with(const std::string& string, const std::string& search)
static inline BLT_CPP20_CONSTEXPR bool starts_with(std::string_view string, std::string_view search)
{
#ifdef BLT_USE_CPP20
return string.starts_with(search);
#else
if (search.length() > string.length())
return false;
auto chars = string.c_str();
auto search_chars = search.c_str();
for (unsigned int i = 0; i < search.length(); i++)
{
if (chars[i] != search_chars[i])
if (string[i] != search[i])
return false;
}
return true;
#endif
}
static inline BLT_CPP20_CONSTEXPR bool starts_with(const std::string& string, char search)
static inline BLT_CPP20_CONSTEXPR bool starts_with(std::string_view string, char search)
{
#ifdef BLT_USE_CPP20
return string.starts_with(search);
#else
if (string.empty())
return false;
return string[0] == search;
return string.front() == search;
#endif
}
static inline BLT_CPP20_CONSTEXPR bool ends_with(const std::string& string, const std::string& search)
static inline BLT_CPP20_CONSTEXPR bool ends_with(std::string_view string, std::string_view search)
{
#ifdef BLT_USE_CPP20
return string.ends_with(search);
#else
if (search.length() > string.length())
return false;
auto chars = string.c_str();
auto search_chars = search.c_str();
auto startPosition = string.length() - search.length();
for (unsigned int i = 0; i < search.length(); i++)
{
if (chars[startPosition + i] != search_chars[i])
if (string[startPosition + i] != search[i])
return false;
}
return true;
#endif
}
static inline BLT_CPP20_CONSTEXPR bool ends_with(const std::string& string, char search)
static inline BLT_CPP20_CONSTEXPR bool ends_with(std::string_view string, char search)
{
#ifdef BLT_USE_CPP20
return string.ends_with(search);
#else
if (string.empty())
return false;
return string[string.size() - 1] == search;
return string.back() == search;
#endif
}
static inline std::optional<std::vector<size_t>> containsAll(const std::string& string, const std::unordered_set<char>& search)
static inline std::optional<std::vector<size_t>> containsAll(std::string_view string, const std::unordered_set<char>& search)
{
std::vector<size_t> pos;
for (size_t i = 0; i < string.length(); i++)
@ -135,7 +132,7 @@ namespace blt::string
return {};
}
static inline size_t contains(const std::string& string, const std::unordered_set<char>& search)
static inline size_t contains(std::string_view string, const std::unordered_set<char>& search)
{
for (size_t i = 0; i < string.length(); i++)
{
@ -145,7 +142,7 @@ namespace blt::string
return false;
}
static inline BLT_CPP20_CONSTEXPR bool contains(const std::string& string, const char search)
static inline BLT_CPP20_CONSTEXPR bool contains(std::string_view string, const char search)
{
#if __cplusplus >= 202002L
return std::ranges::any_of(string, [search](const char c) -> bool {
@ -161,20 +158,18 @@ namespace blt::string
#endif
}
static inline BLT_CPP20_CONSTEXPR bool contains(const std::string& string, const std::string& search)
static inline BLT_CPP20_CONSTEXPR bool contains(std::string_view string, std::string_view search)
{
if (search.length() > string.length())
return false;
auto chars = string.c_str();
auto search_chars = search.c_str();
for (unsigned int i = 0; i < string.length(); i++)
{
if (chars[i] == search_chars[0])
if (string[i] == search[0])
{
bool correct = true;
for (unsigned int j = 0; j < search.length(); j++)
{
if (chars[i + j] != search_chars[j])
if (string[i + j] != search[j])
{
correct = false;
break;
@ -192,7 +187,7 @@ namespace blt::string
* @param s string to lower case
* @return a string copy that is all lower case
*/
static inline BLT_CPP20_CONSTEXPR std::string toLowerCase(const std::string& s)
static inline BLT_CPP20_CONSTEXPR std::string toLowerCase(std::string_view s)
{
std::string str;
std::for_each(
@ -208,7 +203,7 @@ namespace blt::string
* @param s string to upper case
* @return a string copy that is all upper case
*/
static inline BLT_CPP20_CONSTEXPR std::string toUpperCase(const std::string& s)
static inline BLT_CPP20_CONSTEXPR std::string toUpperCase(std::string_view s)
{
std::string str;
std::for_each(
@ -221,7 +216,7 @@ 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, const std::string& delim)
static inline BLT_CPP20_CONSTEXPR std::vector<std::string> split(std::string s, std::string_view delim)
{
size_t pos = 0;
std::vector<std::string> tokens;
@ -231,7 +226,7 @@ namespace blt::string
tokens.push_back(token);
s.erase(0, pos + delim.length());
}
tokens.push_back(s);
tokens.push_back(std::move(s));
return tokens;
}
@ -250,7 +245,7 @@ namespace blt::string
}
// https://stackoverflow.com/questions/3418231/replace-part-of-a-string-with-another-string
static inline BLT_CPP20_CONSTEXPR bool replace(std::string& str, const std::string& from, const std::string& to)
static inline BLT_CPP20_CONSTEXPR bool replace(std::string& str, std::string_view from, std::string_view to)
{
size_t start_pos = str.find(from);
if (start_pos == std::string::npos)
@ -259,7 +254,7 @@ namespace blt::string
return true;
}
static inline BLT_CPP20_CONSTEXPR void replaceAll(std::string& str, const std::string& from, const std::string& to)
static inline BLT_CPP20_CONSTEXPR void replaceAll(std::string& str, std::string_view from, std::string_view to)
{
if (from.empty())
return;