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https://github.com/RetroDECK/Duckstation.git
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SmallString: Tidy-up and add wide string helpers
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Stenzek
parent
b02d3592dd
commit
8a3dbbbea5
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@ -1,20 +1,17 @@
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// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
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// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
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// SPDX-License-Identifier: (GPL-3.0 OR PolyForm-Strict-1.0.0)
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#include "small_string.h"
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#include "assert.h"
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#include "string_util.h"
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#include <algorithm>
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#include <cctype>
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#include <cstdio>
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#include <cstring>
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#ifdef _MSC_VER
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#define CASE_COMPARE _stricmp
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#define CASE_N_COMPARE _strnicmp
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#else
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#define CASE_COMPARE strcasecmp
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#define CASE_N_COMPARE strncasecmp
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#ifdef _WIN32
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#include "windows_headers.h"
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#endif
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SmallStringBase::SmallStringBase() = default;
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@ -443,6 +440,36 @@ void SmallStringBase::assign(const std::string_view str)
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append(str.data(), static_cast<u32>(str.size()));
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}
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#ifdef _WIN32
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void SmallStringBase::assign(const std::wstring_view wstr)
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{
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int mblen =
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WideCharToMultiByte(CP_UTF8, 0, wstr.data(), static_cast<int>(wstr.length()), nullptr, 0, nullptr, nullptr);
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if (mblen < 0)
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{
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clear();
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return;
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}
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reserve(static_cast<u32>(mblen));
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if (mblen > 0 && WideCharToMultiByte(CP_UTF8, 0, wstr.data(), static_cast<int>(wstr.length()), m_buffer, mblen,
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nullptr, nullptr) < 0)
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{
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clear();
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return;
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}
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m_length = static_cast<u32>(mblen);
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}
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std::wstring SmallStringBase::wstring() const
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{
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return StringUtil::UTF8StringToWideString(view());
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}
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#endif
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void SmallStringBase::vformat(fmt::string_view fmt, fmt::format_args args)
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{
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clear();
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@ -479,7 +506,7 @@ bool SmallStringBase::iequals(const char* otherText) const
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if (m_length == 0)
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return (std::strlen(otherText) == 0);
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else
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return (CASE_COMPARE(m_buffer, otherText) == 0);
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return StringUtil::EqualNoCase(view(), otherText);
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}
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bool SmallStringBase::iequals(const SmallStringBase& str) const
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@ -490,13 +517,13 @@ bool SmallStringBase::iequals(const SmallStringBase& str) const
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bool SmallStringBase::iequals(const std::string_view str) const
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{
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return (m_length == static_cast<u32>(str.length()) &&
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(m_length == 0 || CASE_N_COMPARE(m_buffer, str.data(), m_length) == 0));
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(m_length == 0 || StringUtil::Strncasecmp(m_buffer, str.data(), m_length) == 0));
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}
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bool SmallStringBase::iequals(const std::string& str) const
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{
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return (m_length == static_cast<u32>(str.length()) &&
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(m_length == 0 || CASE_N_COMPARE(m_buffer, str.data(), m_length) == 0));
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(m_length == 0 || StringUtil::Strncasecmp(m_buffer, str.data(), m_length) == 0));
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}
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int SmallStringBase::compare(const char* otherText) const
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@ -560,7 +587,7 @@ int SmallStringBase::icompare(const SmallStringBase& str) const
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else if (str.m_length == 0)
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return 1;
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const int res = CASE_N_COMPARE(m_buffer, str.m_buffer, std::min(m_length, str.m_length));
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const int res = StringUtil::Strncasecmp(m_buffer, str.m_buffer, std::min(m_length, str.m_length));
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if (m_length == str.m_length || res != 0)
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return res;
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else
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@ -575,7 +602,7 @@ int SmallStringBase::icompare(const std::string_view str) const
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else if (slength == 0)
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return 1;
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const int res = CASE_N_COMPARE(m_buffer, str.data(), std::min(m_length, slength));
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const int res = StringUtil::Strncasecmp(m_buffer, str.data(), std::min(m_length, slength));
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if (m_length == slength || res != 0)
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return res;
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else
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@ -590,7 +617,7 @@ int SmallStringBase::icompare(const std::string& str) const
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else if (slength == 0)
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return 1;
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const int res = CASE_N_COMPARE(m_buffer, str.data(), std::min(m_length, slength));
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const int res = StringUtil::Strncasecmp(m_buffer, str.data(), std::min(m_length, slength));
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if (m_length == slength || res != 0)
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return res;
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else
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@ -604,7 +631,7 @@ bool SmallStringBase::starts_with(const char* str, bool case_sensitive) const
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return false;
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return (case_sensitive) ? (std::strncmp(str, m_buffer, other_length) == 0) :
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(CASE_N_COMPARE(str, m_buffer, other_length) == 0);
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(StringUtil::Strncasecmp(str, m_buffer, other_length) == 0);
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}
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bool SmallStringBase::starts_with(const SmallStringBase& str, bool case_sensitive) const
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@ -614,7 +641,7 @@ bool SmallStringBase::starts_with(const SmallStringBase& str, bool case_sensitiv
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return false;
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return (case_sensitive) ? (std::strncmp(str.m_buffer, m_buffer, other_length) == 0) :
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(CASE_N_COMPARE(str.m_buffer, m_buffer, other_length) == 0);
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(StringUtil::Strncasecmp(str.m_buffer, m_buffer, other_length) == 0);
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}
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bool SmallStringBase::starts_with(const std::string_view str, bool case_sensitive) const
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@ -624,7 +651,7 @@ bool SmallStringBase::starts_with(const std::string_view str, bool case_sensitiv
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return false;
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return (case_sensitive) ? (std::strncmp(str.data(), m_buffer, other_length) == 0) :
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(CASE_N_COMPARE(str.data(), m_buffer, other_length) == 0);
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(StringUtil::Strncasecmp(str.data(), m_buffer, other_length) == 0);
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}
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bool SmallStringBase::starts_with(const std::string& str, bool case_sensitive) const
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@ -634,7 +661,7 @@ bool SmallStringBase::starts_with(const std::string& str, bool case_sensitive) c
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return false;
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return (case_sensitive) ? (std::strncmp(str.data(), m_buffer, other_length) == 0) :
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(CASE_N_COMPARE(str.data(), m_buffer, other_length) == 0);
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(StringUtil::Strncasecmp(str.data(), m_buffer, other_length) == 0);
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}
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bool SmallStringBase::ends_with(const char* str, bool case_sensitive) const
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@ -645,7 +672,7 @@ bool SmallStringBase::ends_with(const char* str, bool case_sensitive) const
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u32 start_offset = m_length - other_length;
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return (case_sensitive) ? (std::strncmp(str, m_buffer + start_offset, other_length) == 0) :
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(CASE_N_COMPARE(str, m_buffer + start_offset, other_length) == 0);
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(StringUtil::Strncasecmp(str, m_buffer + start_offset, other_length) == 0);
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}
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bool SmallStringBase::ends_with(const SmallStringBase& str, bool case_sensitive) const
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@ -656,7 +683,7 @@ bool SmallStringBase::ends_with(const SmallStringBase& str, bool case_sensitive)
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const u32 start_offset = m_length - other_length;
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return (case_sensitive) ? (std::strncmp(str.m_buffer, m_buffer + start_offset, other_length) == 0) :
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(CASE_N_COMPARE(str.m_buffer, m_buffer + start_offset, other_length) == 0);
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(StringUtil::Strncasecmp(str.m_buffer, m_buffer + start_offset, other_length) == 0);
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}
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bool SmallStringBase::ends_with(const std::string_view str, bool case_sensitive) const
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@ -667,7 +694,7 @@ bool SmallStringBase::ends_with(const std::string_view str, bool case_sensitive)
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const u32 start_offset = m_length - other_length;
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return (case_sensitive) ? (std::strncmp(str.data(), m_buffer + start_offset, other_length) == 0) :
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(CASE_N_COMPARE(str.data(), m_buffer + start_offset, other_length) == 0);
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(StringUtil::Strncasecmp(str.data(), m_buffer + start_offset, other_length) == 0);
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}
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bool SmallStringBase::ends_with(const std::string& str, bool case_sensitive) const
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@ -678,7 +705,7 @@ bool SmallStringBase::ends_with(const std::string& str, bool case_sensitive) con
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const u32 start_offset = m_length - other_length;
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return (case_sensitive) ? (std::strncmp(str.data(), m_buffer + start_offset, other_length) == 0) :
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(CASE_N_COMPARE(str.data(), m_buffer + start_offset, other_length) == 0);
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(StringUtil::Strncasecmp(str.data(), m_buffer + start_offset, other_length) == 0);
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}
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void SmallStringBase::clear()
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@ -732,6 +759,45 @@ u32 SmallStringBase::count(char ch) const
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return count;
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}
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u32 SmallStringBase::replace(const char* search, const char* replacement)
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{
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const u32 search_length = static_cast<u32>(std::strlen(search));
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const u32 replacement_length = static_cast<u32>(std::strlen(replacement));
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s32 offset = 0;
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u32 count = 0;
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for (;;)
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{
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offset = find(search, static_cast<u32>(offset));
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if (offset < 0)
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break;
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const u32 new_length = m_length - search_length + replacement_length;
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reserve(new_length);
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m_length = new_length;
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const u32 chars_after_offset = (m_length - static_cast<u32>(offset));
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DebugAssert(chars_after_offset >= search_length);
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if (chars_after_offset > search_length)
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{
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std::memmove(&m_buffer[static_cast<u32>(offset) + replacement_length],
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&m_buffer[static_cast<u32>(offset) + search_length], chars_after_offset - search_length);
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std::memcpy(&m_buffer[static_cast<u32>(offset)], replacement, replacement_length);
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}
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else
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{
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// at end of string
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std::memcpy(&m_buffer[static_cast<u32>(offset)], replacement, replacement_length);
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m_buffer[static_cast<u32>(offset) + replacement_length] = '\0';
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}
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offset += replacement_length;
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count++;
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}
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return count;
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}
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void SmallStringBase::resize(u32 new_size, char fill, bool shrink_if_smaller)
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{
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// if going larger, or we don't own the buffer, realloc
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@ -1,5 +1,5 @@
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// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
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// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
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// SPDX-License-Identifier: (GPL-3.0 OR PolyForm-Strict-1.0.0)
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#pragma once
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#include "types.h"
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@ -144,6 +144,9 @@ public:
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// returns the number of instances of the specified character
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u32 count(char ch) const;
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// replaces search string with replacement, returns the number of replacements made
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u32 replace(const char* search, const char* replacement);
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// removes characters from string
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void erase(s32 offset, s32 count = std::numeric_limits<s32>::max());
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@ -189,6 +192,12 @@ public:
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// returns a substring view for this string
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std::string_view substr(s32 offset, s32 count) const;
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#ifdef _WIN32
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// wide string adapters, win32 only
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void assign(const std::wstring_view wstr);
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std::wstring wstring() const;
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#endif
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// accessor operators
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ALWAYS_INLINE operator const char*() const { return c_str(); }
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ALWAYS_INLINE operator char*() { return data(); }
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