liveBook · Manning

Multibyte character

As explained in Modern C, Third Edition

A multibyte character is a sequence of bytes interpreted as one character from an extended character set.

A multibyte character is a sequence of bytes interpreted as one character from an extended character set. A multibyte string contains such characters and remains compatible with ordinary null-terminated strings. section 14.3

Enable the locale before printing

setlocale(LC_ALL, ""); switches the program to the environment's locale before printing text such as "fär ínóff" or other extended characters. Unicode escape literals can also define box-drawing characters such as vertical and horizontal bars. section 14.3

Keep these constraints in mind:

  • Multibyte characters do not contain null bytes, and multibyte strings are null terminated. section 14.3
  • Use ordinary string functions such as strcpy when byte-string compatibility is sufficient, but do not infer printed-character count from char-array length or strlen. section 14.3
  • Use mbstate_t and the <wchar.h> conversion utilities when parsing individual characters requires state. section 14.3

How Modern C, Third Edition covers it

How deep it goes
Defines byte representation, termination, counting limits, locale setup, and stateful conversion, but defers full parsing details.
Examples
Uses locale-enabled output, accented text, box-drawing literals, and mbsrtowcs-based character counting.
What it assumes
Assumes familiarity with C strings and char arrays while introducing extended character sets, wide characters, and parsing state.
What you can do after
Apply locale setup and stateful conversion while avoiding byte-length assumptions for printed-character counts.
How it connects
Connects multibyte characters with locales, multibyte strings, strlen, wchar_t, mbstate_t, and Unicode.
Cover of Modern C, Third Edition
liveBookmanning.com
Read Modern C, Third Edition on liveBook Get the book at manning.com

Also explained in

Compare how 2 books explain multibyte character →

Related concepts

This explainer was generated by Manning's knowledge graph from the text of Modern C, Third Edition. The section links point to the parts of the book it draws on.