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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 <iostream>
#include <string> #include <string>
#include <string_view>
#include <sstream> #include <sstream>
#include <algorithm> #include <algorithm>
#include <vector> #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 #ifdef BLT_USE_CPP20
return string.starts_with(search); return string.starts_with(search);
#else #else
if (search.length() > string.length()) if (search.length() > string.length())
return false; return false;
auto chars = string.c_str();
auto search_chars = search.c_str();
for (unsigned int i = 0; i < search.length(); i++) for (unsigned int i = 0; i < search.length(); i++)
{ {
if (chars[i] != search_chars[i]) if (string[i] != search[i])
return false; return false;
} }
return true; return true;
#endif #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 #ifdef BLT_USE_CPP20
return string.starts_with(search); return string.starts_with(search);
#else #else
if (string.empty()) if (string.empty())
return false; return false;
return string[0] == search; return string.front() == search;
#endif #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 #ifdef BLT_USE_CPP20
return string.ends_with(search); return string.ends_with(search);
#else #else
if (search.length() > string.length()) if (search.length() > string.length())
return false; return false;
auto chars = string.c_str();
auto search_chars = search.c_str();
auto startPosition = string.length() - search.length(); auto startPosition = string.length() - search.length();
for (unsigned int i = 0; i < search.length(); i++) 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 false;
} }
return true; return true;
#endif #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 #ifdef BLT_USE_CPP20
return string.ends_with(search); return string.ends_with(search);
#else #else
if (string.empty()) if (string.empty())
return false; return false;
return string[string.size() - 1] == search; return string.back() == search;
#endif #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; std::vector<size_t> pos;
for (size_t i = 0; i < string.length(); i++) for (size_t i = 0; i < string.length(); i++)
@ -135,7 +132,7 @@ namespace blt::string
return {}; 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++) for (size_t i = 0; i < string.length(); i++)
{ {
@ -145,7 +142,7 @@ namespace blt::string
return false; 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 #if __cplusplus >= 202002L
return std::ranges::any_of(string, [search](const char c) -> bool { return std::ranges::any_of(string, [search](const char c) -> bool {
@ -161,20 +158,18 @@ namespace blt::string
#endif #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()) if (search.length() > string.length())
return false; return false;
auto chars = string.c_str();
auto search_chars = search.c_str();
for (unsigned int i = 0; i < string.length(); i++) for (unsigned int i = 0; i < string.length(); i++)
{ {
if (chars[i] == search_chars[0]) if (string[i] == search[0])
{ {
bool correct = true; bool correct = true;
for (unsigned int j = 0; j < search.length(); j++) for (unsigned int j = 0; j < search.length(); j++)
{ {
if (chars[i + j] != search_chars[j]) if (string[i + j] != search[j])
{ {
correct = false; correct = false;
break; break;
@ -192,7 +187,7 @@ namespace blt::string
* @param s string to lower case * @param s string to lower case
* @return a string copy that is all 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::string str;
std::for_each( std::for_each(
@ -208,7 +203,7 @@ namespace blt::string
* @param s string to upper case * @param s string to upper case
* @return a string copy that is all 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::string str;
std::for_each( 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 // taken from https://stackoverflow.com/questions/14265581/parse-split-a-string-in-c-using-string-delimiter-standard-c
// extended to return a vector // 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; size_t pos = 0;
std::vector<std::string> tokens; std::vector<std::string> tokens;
@ -231,7 +226,7 @@ namespace blt::string
tokens.push_back(token); tokens.push_back(token);
s.erase(0, pos + delim.length()); s.erase(0, pos + delim.length());
} }
tokens.push_back(s); tokens.push_back(std::move(s));
return tokens; return tokens;
} }
@ -250,7 +245,7 @@ namespace blt::string
} }
// https://stackoverflow.com/questions/3418231/replace-part-of-a-string-with-another-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); size_t start_pos = str.find(from);
if (start_pos == std::string::npos) if (start_pos == std::string::npos)
@ -259,7 +254,7 @@ namespace blt::string
return true; 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()) if (from.empty())
return; return;