sierra::implementation::StringData Union Reference

List of all members.

Public Types
enum	{ buf_len = 32 }
enum	{ off_len = buf_len - 1 }
enum	{ max_len = buf_len - 2 }
Public Member Functions
size_t	len () const
const char *	c_str () const
char *	c_str ()
char *	mem (const char *, size_t n)
Public Attributes
struct sierra::implementation::StringData::Large	large
char	small [buf_len]

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Detailed Description

Objectives:

• Don't allocate for short strings, strings <= max_len
• buf_len == sizeof(String)
• buf_len % sizeof(unsigned long) == 0

Limitations:

• sizeof(StringData::Large) + 2 <= buf_len < ( 127 == 0x7f )

Memory layout for short strings that are <= max_len

• buf[ 0 .. max_len - 1 ] = buffer for characters
• buf[ max_len ] = null
• buf[ off_len ] = length of string
• data = must not be used

Memory layout for long strings that are > max_len

• data.ptr = pointer to allocated memory
• data.len = length of string
• data.siz = allocated size
• buf[ max_len ] != null
• buf[ 0 .. max_len - 1 ] = must not be used

Definition at line 248 of file String.hpp.

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Member Function Documentation

char * sierra::implementation::StringData::mem	(	const char *	cs,
		size_t	n
	)

Assigns memory and copy contents

Definition at line 119 of file String.cpp.

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The documentation for this union was generated from the following files:

• String.hpp
• String.cpp