FromChars.h File Reference

Declare functions to convert numeric types to string representation. More...

#include <system_error>

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Classes
struct	FromCharsResult
	Result of the conversion, similar to std::from_chars_result. More...

Functions
STRING_UTILS_API FromCharsResult	FromChars (const char *buffer, const char *last, float &value) noexcept
	Parse a string into a single precision floating point value, always uses the dot as decimal. More...
STRING_UTILS_API FromCharsResult	FromChars (const char *buffer, const char *last, double &value) noexcept
	Parse a string into a single precision floating point value, always uses the dot as decimal. More...
STRING_UTILS_API FromCharsResult	FromChars (const char *buffer, const char *last, short &value) noexcept
	Parse a string into a signed 16-bit integer value. More...
STRING_UTILS_API FromCharsResult	FromChars (const char *buffer, const char *last, unsigned short &value) noexcept
	Parse a string into an unsigned 16-bit integer value. More...
STRING_UTILS_API FromCharsResult	FromChars (const char *buffer, const char *last, int &value) noexcept
	Parse a string into a signed 32-bit integer value. More...
STRING_UTILS_API FromCharsResult	FromChars (const char *buffer, const char *last, unsigned int &value) noexcept
	Parse a string into an unsigned 32-bit integer value. More...
STRING_UTILS_API FromCharsResult	FromChars (const char *buffer, const char *last, long &value) noexcept
	Parse a string into a signed long integer value. More...
STRING_UTILS_API FromCharsResult	FromChars (const char *buffer, const char *last, unsigned long &value) noexcept
	Parse a string into an unsigned long integer value. More...
STRING_UTILS_API FromCharsResult	FromChars (const char *buffer, const char *last, long long &value) noexcept
	Parse a string into a signed 64-bit integer value. More...
STRING_UTILS_API FromCharsResult	FromChars (const char *buffer, const char *last, unsigned long long &value) noexcept
	Parse a string into an unsigned 64-bit integer value. More...
STRING_UTILS_API FromCharsResult	FromChars (const char *buffer, const char *last, bool &value) noexcept
	Parse a string into a boolean value. String must be "0" or "1". More...

Detailed Description

Declare functions to convert numeric types to string representation.

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Audacity: A Digital Audio Editor

Dmitry Vedenko

Definition in file FromChars.h.

Function Documentation

FromChars() [1/11]

STRING_UTILS_API FromCharsResult FromChars ( const char *  buffer, const char *  last, bool &  value  )

noexcept

Parse a string into a boolean value. String must be "0" or "1".

Definition at line 206 of file FromChars.cpp.

{
   if (buffer >= last)
      return { buffer, std::errc::invalid_argument };
 
   if (buffer[0] == '0')
   {
      value = false;
      return { buffer + 1, std::errc() };
   }
   else if (buffer[0] == '1')
   {
      value = true;
      return { buffer + 1, std::errc() };
   }
 
   return { buffer, std::errc::invalid_argument };
}

FromChars() [2/11]

STRING_UTILS_API FromCharsResult FromChars ( const char *  buffer, const char *  last, double &  value  )

noexcept

Parse a string into a single precision floating point value, always uses the dot as decimal.

Definition at line 159 of file FromChars.cpp.

{
   const auto result = fast_float::from_chars(buffer, last, value);
   return { result.ptr, result.ec };
}

References fast_float::from_chars().

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FromChars() [3/11]

STRING_UTILS_API FromCharsResult FromChars ( const char *  buffer, const char *  last, float &  value  )

noexcept

Parse a string into a single precision floating point value, always uses the dot as decimal.

Definition at line 153 of file FromChars.cpp.

{
   const auto result = fast_float::from_chars(buffer, last, value);
   return { result.ptr, result.ec };
}

References fast_float::from_chars().

Referenced by anonymous_namespace{ImportMP3_MPG123.cpp}::GetId3v2Genre(), ProjectFileIO::GetValue(), audacity::cloud::audiocom::sync::anonymous_namespace{WavPackCompressor.cpp}::Importer::Importer(), audacity::cloud::audiocom::sync::anonymous_namespace{ResumedSnaphotUploadOperation.cpp}::IsUrlExpired(), XMLAttributeValueView::TryGet(), and XMLAttributeValueView::TryGetInteger().

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FromChars() [4/11]

STRING_UTILS_API FromCharsResult FromChars ( const char *  buffer, const char *  last, int &  value  )

noexcept

Parse a string into a signed 32-bit integer value.

Definition at line 175 of file FromChars.cpp.

{
   return IntFromChars(buffer, last, value);
}

References anonymous_namespace{FromChars.cpp}::IntFromChars().

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FromChars() [5/11]

STRING_UTILS_API FromCharsResult FromChars ( const char *  buffer, const char *  last, long &  value  )

noexcept

Parse a string into a signed long integer value.

Definition at line 185 of file FromChars.cpp.

{
   return IntFromChars(buffer, last, value);
}

References anonymous_namespace{FromChars.cpp}::IntFromChars().

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FromChars() [6/11]

STRING_UTILS_API FromCharsResult FromChars ( const char *  buffer, const char *  last, long long &  value  )

noexcept

Parse a string into a signed 64-bit integer value.

Definition at line 195 of file FromChars.cpp.

{
   return IntFromChars(buffer, last, value);
}

References anonymous_namespace{FromChars.cpp}::IntFromChars().

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FromChars() [7/11]

STRING_UTILS_API FromCharsResult FromChars ( const char *  buffer, const char *  last, short &  value  )

noexcept

Parse a string into a signed 16-bit integer value.

Definition at line 165 of file FromChars.cpp.

{
   return IntFromChars(buffer, last, value);
}

References anonymous_namespace{FromChars.cpp}::IntFromChars().

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FromChars() [8/11]

STRING_UTILS_API FromCharsResult FromChars ( const char *  buffer, const char *  last, unsigned int &  value  )

noexcept

Parse a string into an unsigned 32-bit integer value.

Definition at line 180 of file FromChars.cpp.

{
   return IntFromChars(buffer, last, value);
}

References anonymous_namespace{FromChars.cpp}::IntFromChars().

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FromChars() [9/11]

STRING_UTILS_API FromCharsResult FromChars ( const char *  buffer, const char *  last, unsigned long &  value  )

noexcept

Parse a string into an unsigned long integer value.

Definition at line 190 of file FromChars.cpp.

{
   return IntFromChars(buffer, last, value);
}

References anonymous_namespace{FromChars.cpp}::IntFromChars().

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FromChars() [10/11]

STRING_UTILS_API FromCharsResult FromChars ( const char *  buffer, const char *  last, unsigned long long &  value  )

noexcept

Parse a string into an unsigned 64-bit integer value.

Definition at line 200 of file FromChars.cpp.

{
   return IntFromChars(buffer, last, value);
}

References anonymous_namespace{FromChars.cpp}::IntFromChars().

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FromChars() [11/11]

STRING_UTILS_API FromCharsResult FromChars ( const char *  buffer, const char *  last, unsigned short &  value  )

noexcept

Parse a string into an unsigned 16-bit integer value.

Definition at line 170 of file FromChars.cpp.

{
   return IntFromChars(buffer, last, value);
}

References anonymous_namespace{FromChars.cpp}::IntFromChars().

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