566 lines
16 KiB
C
566 lines
16 KiB
C
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/*
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* mptStringBuffer.h
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* -----------------
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* Purpose: Various functions for "fixing" char array strings for writing to or
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* reading from module files, or for securing char arrays in general.
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* Notes : (currently none)
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* Authors: OpenMPT Devs
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* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
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*/
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#pragma once
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#include "BuildSettings.h"
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#include "mptMemory.h"
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#include "mptString.h"
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#include <algorithm>
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#include <string>
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#include <vector>
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OPENMPT_NAMESPACE_BEGIN
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namespace mpt
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{
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namespace String
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{
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enum ReadWriteMode : uint8
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{
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// Reading / Writing: Standard null-terminated string handling.
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nullTerminated = 1,
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// Reading: Source string is not guaranteed to be null-terminated (if it fills the whole char array).
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// Writing: Destination string is not guaranteed to be null-terminated (if it fills the whole char array).
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maybeNullTerminated = 2,
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// Reading: String may contain null characters anywhere. They should be treated as spaces.
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// Writing: A space-padded string is written.
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spacePadded = 3,
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// Reading: String may contain null characters anywhere. The last character is ignored (it is supposed to be 0).
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// Writing: A space-padded string with a trailing null is written.
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spacePaddedNull = 4,
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};
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namespace detail
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{
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std::string ReadStringBuffer(String::ReadWriteMode mode, const char *srcBuffer, std::size_t srcSize);
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void WriteStringBuffer(String::ReadWriteMode mode, char *destBuffer, const std::size_t destSize, const char *srcBuffer, const std::size_t srcSize);
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} // namespace detail
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} // namespace String
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template <typename Tstring, typename Tchar>
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class StringBufRefImpl
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{
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private:
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Tchar * buf;
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std::size_t size;
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public:
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// cppcheck false-positive
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// cppcheck-suppress uninitMemberVar
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explicit StringBufRefImpl(Tchar * buf, std::size_t size)
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: buf(buf)
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, size(size)
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{
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static_assert(sizeof(Tchar) == sizeof(typename Tstring::value_type));
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MPT_ASSERT(size > 0);
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}
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StringBufRefImpl(const StringBufRefImpl &) = delete;
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StringBufRefImpl(StringBufRefImpl &&) = default;
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StringBufRefImpl & operator = (const StringBufRefImpl &) = delete;
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StringBufRefImpl & operator = (StringBufRefImpl &&) = delete;
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operator Tstring () const
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{
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std::size_t len = std::find(buf, buf + size, Tchar('\0')) - buf; // terminate at \0
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return Tstring(buf, buf + len);
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}
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bool empty() const
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{
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return buf[0] == Tchar('\0');
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}
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StringBufRefImpl & operator = (const Tstring & str)
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{
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std::fill(buf, buf + size, Tchar('\0'));
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std::copy(str.data(), str.data() + std::min(str.length(), size - 1), buf);
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std::fill(buf + std::min(str.length(), size - 1), buf + size, Tchar('\0'));
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return *this;
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}
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};
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template <typename Tstring, typename Tchar>
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class StringBufRefImpl<Tstring, const Tchar>
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{
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private:
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const Tchar * buf;
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std::size_t size;
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public:
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// cppcheck false-positive
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// cppcheck-suppress uninitMemberVar
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explicit StringBufRefImpl(const Tchar * buf, std::size_t size)
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: buf(buf)
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, size(size)
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{
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static_assert(sizeof(Tchar) == sizeof(typename Tstring::value_type));
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MPT_ASSERT(size > 0);
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}
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StringBufRefImpl(const StringBufRefImpl &) = delete;
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StringBufRefImpl(StringBufRefImpl &&) = default;
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StringBufRefImpl & operator = (const StringBufRefImpl &) = delete;
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StringBufRefImpl & operator = (StringBufRefImpl &&) = delete;
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operator Tstring () const
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{
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std::size_t len = std::find(buf, buf + size, Tchar('\0')) - buf; // terminate at \0
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return Tstring(buf, buf + len);
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}
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bool empty() const
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{
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return buf[0] == Tchar('\0');
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}
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};
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namespace String {
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template <typename Tstring, typename Tchar, std::size_t size>
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inline StringBufRefImpl<Tstring, typename std::add_const<Tchar>::type> ReadTypedBuf(Tchar (&buf)[size])
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{
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return StringBufRefImpl<Tstring, typename std::add_const<Tchar>::type>(buf, size);
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}
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template <typename Tstring, typename Tchar>
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inline StringBufRefImpl<Tstring, typename std::add_const<Tchar>::type> ReadTypedBuf(Tchar * buf, std::size_t size)
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{
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return StringBufRefImpl<Tstring, typename std::add_const<Tchar>::type>(buf, size);
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}
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template <typename Tstring, typename Tchar, std::size_t size>
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inline StringBufRefImpl<Tstring, Tchar> WriteTypedBuf(Tchar (&buf)[size])
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{
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return StringBufRefImpl<Tstring, Tchar>(buf, size);
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}
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template <typename Tstring, typename Tchar>
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inline StringBufRefImpl<Tstring, Tchar> WriteTypedBuf(Tchar * buf, std::size_t size)
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{
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return StringBufRefImpl<Tstring, Tchar>(buf, size);
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}
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} // namespace String
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namespace String {
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template <typename Tchar, std::size_t size>
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inline StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, typename std::add_const<Tchar>::type> ReadAutoBuf(Tchar (&buf)[size])
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{
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return StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, typename std::add_const<Tchar>::type>(buf, size);
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}
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template <typename Tchar>
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inline StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, typename std::add_const<Tchar>::type> ReadAutoBuf(Tchar * buf, std::size_t size)
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{
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return StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, typename std::add_const<Tchar>::type>(buf, size);
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}
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template <typename Tchar, std::size_t size>
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inline StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, Tchar> WriteAutoBuf(Tchar (&buf)[size])
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{
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return StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, Tchar>(buf, size);
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}
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template <typename Tchar>
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inline StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, Tchar> WriteAutoBuf(Tchar * buf, std::size_t size)
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{
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return StringBufRefImpl<typename std::basic_string<typename std::remove_const<Tchar>::type>, Tchar>(buf, size);
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}
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} // namespace String
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template <std::size_t len, mpt::String::ReadWriteMode mode = static_cast<mpt::String::ReadWriteMode>(0)> struct charbuf;
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template <std::size_t len>
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struct charbuf<len, static_cast<mpt::String::ReadWriteMode>(0)>
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{
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public:
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typedef char Tchar;
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using char_type = Tchar;
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using string_type = std::basic_string<Tchar>;
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constexpr std::size_t static_length() const { return len; }
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public:
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Tchar buf[len];
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public:
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charbuf()
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{
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Clear(buf);
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}
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charbuf(const charbuf &) = default;
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charbuf(charbuf &&) = default;
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charbuf & operator = (const charbuf &) = default;
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charbuf & operator = (charbuf &&) = default;
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const Tchar & operator[](std::size_t i) const { return buf[i]; }
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std::string str() const { return static_cast<std::string>(*this); }
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operator string_type () const
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{
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return mpt::String::ReadAutoBuf(buf);
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}
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bool empty() const
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{
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return mpt::String::ReadAutoBuf(buf).empty();
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}
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charbuf & operator = (const string_type & str)
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{
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mpt::String::WriteAutoBuf(buf) = str;
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return *this;
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}
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public:
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friend bool operator!=(const std::string & a, const charbuf & b) { return a != b.str(); }
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friend bool operator!=(const charbuf & a, const std::string & b) { return a.str() != b; }
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friend bool operator==(const std::string & a, const charbuf & b) { return a == b.str(); }
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friend bool operator==(const charbuf & a, const std::string & b) { return a.str() == b; }
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};
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template <typename Tchar>
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class StringModeBufRefImpl
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{
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private:
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Tchar * buf;
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std::size_t size;
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String::ReadWriteMode mode;
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public:
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// cppcheck false-positive
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// cppcheck-suppress uninitMemberVar
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StringModeBufRefImpl(Tchar * buf, std::size_t size, String::ReadWriteMode mode)
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: buf(buf)
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, size(size)
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, mode(mode)
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{
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static_assert(sizeof(Tchar) == 1);
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}
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StringModeBufRefImpl(const StringModeBufRefImpl &) = delete;
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StringModeBufRefImpl(StringModeBufRefImpl &&) = default;
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StringModeBufRefImpl & operator = (const StringModeBufRefImpl &) = delete;
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StringModeBufRefImpl & operator = (StringModeBufRefImpl &&) = delete;
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operator std::string () const
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{
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return String::detail::ReadStringBuffer(mode, buf, size);
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}
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bool empty() const
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{
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return String::detail::ReadStringBuffer(mode, buf, size).empty();
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}
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StringModeBufRefImpl & operator = (const std::string & str)
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{
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String::detail::WriteStringBuffer(mode, buf, size, str.data(), str.size());
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return *this;
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}
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};
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template <typename Tchar>
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class StringModeBufRefImpl<const Tchar>
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{
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private:
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const Tchar * buf;
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std::size_t size;
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String::ReadWriteMode mode;
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public:
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// cppcheck false-positive
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// cppcheck-suppress uninitMemberVar
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StringModeBufRefImpl(const Tchar * buf, std::size_t size, String::ReadWriteMode mode)
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: buf(buf)
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, size(size)
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, mode(mode)
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{
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static_assert(sizeof(Tchar) == 1);
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}
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StringModeBufRefImpl(const StringModeBufRefImpl &) = delete;
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StringModeBufRefImpl(StringModeBufRefImpl &&) = default;
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StringModeBufRefImpl & operator = (const StringModeBufRefImpl &) = delete;
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StringModeBufRefImpl & operator = (StringModeBufRefImpl &&) = delete;
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operator std::string () const
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{
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return String::detail::ReadStringBuffer(mode, buf, size);
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}
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bool empty() const
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{
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return String::detail::ReadStringBuffer(mode, buf, size).empty();
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}
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};
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namespace String {
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template <typename Tchar, std::size_t size>
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inline StringModeBufRefImpl<typename std::add_const<Tchar>::type> ReadBuf(String::ReadWriteMode mode, Tchar (&buf)[size])
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{
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return StringModeBufRefImpl<typename std::add_const<Tchar>::type>(buf, size, mode);
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}
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template <typename Tchar>
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inline StringModeBufRefImpl<typename std::add_const<Tchar>::type> ReadBuf(String::ReadWriteMode mode, Tchar * buf, std::size_t size)
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{
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return StringModeBufRefImpl<typename std::add_const<Tchar>::type>(buf, size, mode);
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}
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template <typename Tchar, std::size_t size>
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inline StringModeBufRefImpl<Tchar> WriteBuf(String::ReadWriteMode mode, Tchar (&buf)[size])
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{
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return StringModeBufRefImpl<Tchar>(buf, size, mode);
|
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}
|
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template <typename Tchar>
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inline StringModeBufRefImpl<Tchar> WriteBuf(String::ReadWriteMode mode, Tchar * buf, std::size_t size)
|
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{
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return StringModeBufRefImpl<Tchar>(buf, size, mode);
|
||
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}
|
||
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} // namespace String
|
||
|
|
|
||
|
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template <std::size_t len, mpt::String::ReadWriteMode mode>
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||
|
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struct charbuf
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|
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{
|
||
|
|
public:
|
||
|
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typedef char Tchar;
|
||
|
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using char_type = Tchar;
|
||
|
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using string_type = std::basic_string<Tchar>;
|
||
|
|
public:
|
||
|
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Tchar buf[len];
|
||
|
|
public:
|
||
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charbuf() = default;
|
||
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charbuf(const charbuf &) = default;
|
||
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charbuf(charbuf &&) = default;
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||
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charbuf & operator = (const charbuf &) = default;
|
||
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charbuf & operator = (charbuf &&) = default;
|
||
|
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operator string_type () const
|
||
|
|
{
|
||
|
|
return mpt::String::ReadBuf(mode, buf);
|
||
|
|
}
|
||
|
|
bool empty() const
|
||
|
|
{
|
||
|
|
return mpt::String::ReadBuf(mode, buf).empty();
|
||
|
|
}
|
||
|
|
charbuf & operator = (const string_type & str)
|
||
|
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{
|
||
|
|
mpt::String::WriteBuf(mode, buf) = str;
|
||
|
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return *this;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
// see MPT_BINARY_STRUCT
|
||
|
|
template <std::size_t len, mpt::String::ReadWriteMode mode>
|
||
|
|
struct is_binary_safe<typename mpt::charbuf<len, mode>> : public std::true_type { };
|
||
|
|
template <std::size_t len>
|
||
|
|
struct is_binary_safe<typename mpt::charbuf<len, static_cast<mpt::String::ReadWriteMode>(0)>> : public std::false_type { };
|
||
|
|
static_assert(sizeof(mpt::charbuf<7>) == 7);
|
||
|
|
static_assert(alignof(mpt::charbuf<7>) == 1);
|
||
|
|
static_assert(std::is_standard_layout<mpt::charbuf<7>>::value);
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef MODPLUG_TRACKER
|
||
|
|
|
||
|
|
#if MPT_OS_WINDOWS
|
||
|
|
|
||
|
|
namespace String {
|
||
|
|
template <typename Tchar, std::size_t size>
|
||
|
|
inline StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, typename std::add_const<Tchar>::type> ReadWinBuf(Tchar (&buf)[size])
|
||
|
|
{
|
||
|
|
return StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, typename std::add_const<Tchar>::type>(buf, size);
|
||
|
|
}
|
||
|
|
template <typename Tchar>
|
||
|
|
inline StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, typename std::add_const<Tchar>::type> ReadWinBuf(Tchar * buf, std::size_t size)
|
||
|
|
{
|
||
|
|
return StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, typename std::add_const<Tchar>::type>(buf, size);
|
||
|
|
}
|
||
|
|
template <typename Tchar, std::size_t size>
|
||
|
|
inline StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, Tchar> WriteWinBuf(Tchar (&buf)[size])
|
||
|
|
{
|
||
|
|
return StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, Tchar>(buf, size);
|
||
|
|
}
|
||
|
|
template <typename Tchar>
|
||
|
|
inline StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, Tchar> WriteWinBuf(Tchar * buf, std::size_t size)
|
||
|
|
{
|
||
|
|
return StringBufRefImpl<typename mpt::windows_char_traits<typename std::remove_const<Tchar>::type>::string_type, Tchar>(buf, size);
|
||
|
|
}
|
||
|
|
} // namespace String
|
||
|
|
|
||
|
|
#if defined(MPT_WITH_MFC)
|
||
|
|
|
||
|
|
template <typename Tchar>
|
||
|
|
class CStringBufRefImpl
|
||
|
|
{
|
||
|
|
private:
|
||
|
|
Tchar * buf;
|
||
|
|
std::size_t size;
|
||
|
|
public:
|
||
|
|
// cppcheck false-positive
|
||
|
|
// cppcheck-suppress uninitMemberVar
|
||
|
|
explicit CStringBufRefImpl(Tchar * buf, std::size_t size)
|
||
|
|
: buf(buf)
|
||
|
|
, size(size)
|
||
|
|
{
|
||
|
|
MPT_ASSERT(size > 0);
|
||
|
|
}
|
||
|
|
CStringBufRefImpl(const CStringBufRefImpl &) = delete;
|
||
|
|
CStringBufRefImpl(CStringBufRefImpl &&) = default;
|
||
|
|
CStringBufRefImpl & operator = (const CStringBufRefImpl &) = delete;
|
||
|
|
CStringBufRefImpl & operator = (CStringBufRefImpl &&) = delete;
|
||
|
|
operator CString () const
|
||
|
|
{
|
||
|
|
std::size_t len = std::find(buf, buf + size, Tchar('\0')) - buf; // terminate at \0
|
||
|
|
return CString(buf, mpt::saturate_cast<int>(len));
|
||
|
|
}
|
||
|
|
CStringBufRefImpl & operator = (const CString & str)
|
||
|
|
{
|
||
|
|
std::fill(buf, buf + size, Tchar('\0'));
|
||
|
|
std::copy(str.GetString(), str.GetString() + std::min(static_cast<std::size_t>(str.GetLength()), size - 1), buf);
|
||
|
|
buf[size - 1] = Tchar('\0');
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Tchar>
|
||
|
|
class CStringBufRefImpl<const Tchar>
|
||
|
|
{
|
||
|
|
private:
|
||
|
|
const Tchar * buf;
|
||
|
|
std::size_t size;
|
||
|
|
public:
|
||
|
|
// cppcheck false-positive
|
||
|
|
// cppcheck-suppress uninitMemberVar
|
||
|
|
explicit CStringBufRefImpl(const Tchar * buf, std::size_t size)
|
||
|
|
: buf(buf)
|
||
|
|
, size(size)
|
||
|
|
{
|
||
|
|
MPT_ASSERT(size > 0);
|
||
|
|
}
|
||
|
|
CStringBufRefImpl(const CStringBufRefImpl &) = delete;
|
||
|
|
CStringBufRefImpl(CStringBufRefImpl &&) = default;
|
||
|
|
CStringBufRefImpl & operator = (const CStringBufRefImpl &) = delete;
|
||
|
|
CStringBufRefImpl & operator = (CStringBufRefImpl &&) = delete;
|
||
|
|
operator CString () const
|
||
|
|
{
|
||
|
|
std::size_t len = std::find(buf, buf + size, Tchar('\0')) - buf; // terminate at \0
|
||
|
|
return CString(buf, mpt::saturate_cast<int>(len));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
namespace String {
|
||
|
|
template <typename Tchar, std::size_t size>
|
||
|
|
inline CStringBufRefImpl<typename std::add_const<Tchar>::type> ReadCStringBuf(Tchar (&buf)[size])
|
||
|
|
{
|
||
|
|
return CStringBufRefImpl<typename std::add_const<Tchar>::type>(buf, size);
|
||
|
|
}
|
||
|
|
template <typename Tchar>
|
||
|
|
inline CStringBufRefImpl<typename std::add_const<Tchar>::type> ReadCStringBuf(Tchar * buf, std::size_t size)
|
||
|
|
{
|
||
|
|
return CStringBufRefImpl<typename std::add_const<Tchar>::type>(buf, size);
|
||
|
|
}
|
||
|
|
template <typename Tchar, std::size_t size>
|
||
|
|
inline CStringBufRefImpl<Tchar> WriteCStringBuf(Tchar (&buf)[size])
|
||
|
|
{
|
||
|
|
return CStringBufRefImpl<Tchar>(buf, size);
|
||
|
|
}
|
||
|
|
template <typename Tchar>
|
||
|
|
inline CStringBufRefImpl<Tchar> WriteCStringBuf(Tchar * buf, std::size_t size)
|
||
|
|
{
|
||
|
|
return CStringBufRefImpl<Tchar>(buf, size);
|
||
|
|
}
|
||
|
|
} // namespace String
|
||
|
|
|
||
|
|
#endif // MPT_WITH_MFC
|
||
|
|
|
||
|
|
#endif // MPT_OS_WINDOWS
|
||
|
|
|
||
|
|
#endif // MODPLUG_TRACKER
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
namespace String
|
||
|
|
{
|
||
|
|
|
||
|
|
|
||
|
|
#if MPT_COMPILER_MSVC
|
||
|
|
#pragma warning(push)
|
||
|
|
#pragma warning(disable:4127) // conditional expression is constant
|
||
|
|
#endif // MPT_COMPILER_MSVC
|
||
|
|
|
||
|
|
|
||
|
|
// Sets last character to null in given char array.
|
||
|
|
// Size of the array must be known at compile time.
|
||
|
|
template <size_t size>
|
||
|
|
void SetNullTerminator(char (&buffer)[size])
|
||
|
|
{
|
||
|
|
static_assert(size > 0);
|
||
|
|
buffer[size - 1] = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline void SetNullTerminator(char *buffer, size_t size)
|
||
|
|
{
|
||
|
|
MPT_ASSERT(size > 0);
|
||
|
|
buffer[size - 1] = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if !defined(MPT_COMPILER_QUIRK_NO_WCHAR)
|
||
|
|
|
||
|
|
template <size_t size>
|
||
|
|
void SetNullTerminator(wchar_t (&buffer)[size])
|
||
|
|
{
|
||
|
|
static_assert(size > 0);
|
||
|
|
buffer[size - 1] = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline void SetNullTerminator(wchar_t *buffer, size_t size)
|
||
|
|
{
|
||
|
|
MPT_ASSERT(size > 0);
|
||
|
|
buffer[size - 1] = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // !MPT_COMPILER_QUIRK_NO_WCHAR
|
||
|
|
|
||
|
|
|
||
|
|
// Remove any chars after the first null char
|
||
|
|
template <size_t size>
|
||
|
|
void FixNullString(char (&buffer)[size])
|
||
|
|
{
|
||
|
|
static_assert(size > 0);
|
||
|
|
SetNullTerminator(buffer);
|
||
|
|
size_t pos = 0;
|
||
|
|
// Find the first null char.
|
||
|
|
while(pos < size && buffer[pos] != '\0')
|
||
|
|
{
|
||
|
|
pos++;
|
||
|
|
}
|
||
|
|
// Remove everything after the null char.
|
||
|
|
while(pos < size)
|
||
|
|
{
|
||
|
|
buffer[pos++] = '\0';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
inline void FixNullString(std::string & str)
|
||
|
|
{
|
||
|
|
for(std::size_t i = 0; i < str.length(); ++i)
|
||
|
|
{
|
||
|
|
if(str[i] == '\0')
|
||
|
|
{
|
||
|
|
// if we copied \0 in the middle of the buffer, terminate std::string here
|
||
|
|
str.resize(i);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
#if MPT_COMPILER_MSVC
|
||
|
|
#pragma warning(pop)
|
||
|
|
#endif // MPT_COMPILER_MSVC
|
||
|
|
|
||
|
|
|
||
|
|
} // namespace String
|
||
|
|
|
||
|
|
|
||
|
|
} // namespace mpt
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
OPENMPT_NAMESPACE_END
|