ICU 4.2.1 Documentation

API Reference Usage

C++ Programmers:

Use Class Hierarchy or Alphabetical List or Compound List to find the class you are interested in. For example, to find BreakIterator, you can go to the Alphabetical List, then click on "BreakIterator". Once you are at the class, you will find an inheritance chart, a list of the public members, a detailed description of the class, then detailed member descriptions.

C Programmers:

Use Module List or File Members to find a list of all the functions and constants. For example, to find BreakIterator functions you would click on File List, then find "ubrk.h" and click on it. You will find descriptions of Defines, Typedefs, Enumerations, and Functions, with detailed descriptions below. If you want to find a specific function, such as ubrk_next(), then click first on File Members, then use your browser Find dialog to search for "ubrk_next()".

API References for Previous Releases

The API References for each release of ICU are also available as a zip file from the ICU download page.

Architecture (User's Guide)

Module List

Module Name	C	C++
Basic Types and Constants	utypes.h	utypes.h
Strings and Character Iteration	ustring.h, utf.h	UnicodeString, CharacterIterator
Unicode Character Properties and Names	uchar.h	uchar.h C API
Codepage Conversion	ucnv.h	ucnv.h C API
Unicode Text Compression	ucnv.h (encoding name "SCSU" or "BOCU-1")	ucnv.h C API
Locales	uloc.h	Locale
Resource Bundles	ures.h	ResourceBundle
Normalization	unorm.h	Normalizer
Calendars	ucal.h	Calendar
Date and Time Formatting	udat.h	DateFormat
Message Formatting	umsg.h	MessageFormat
Number Formatting	unum.h	NumberFormat
Number Spellout (Rule Based Number Formatting)	unum.h (use UNUM_SPELLOUT)	RuleBasedNumberFormat
Text Transformation (Transliteration)	utrans.h	Transliterator
Bidirectional Algorithm	ubidi.h	ubidi.h C API
Arabic Shaping	ushape.h	ushape.h C API
Collation	ucol.h	Collator
String Searching	usearch.h	StringSearch
Text Boundary Analysis (Break Iteration)	ubrk.h	BreakIterator
Unicode Set	uset.h	UnicodeSet
Regular Expressions	uregex.h	RegexPattern, RegexMatcher
StringPrep	usprep.h	usprep.h C API
International Domain Names in Applications	uidna.h	uidna.h C API
Universal Time Scale	utmscale.h	utmscale.h C API
Basic Layout Engine Types and Constants	(no C API)	LETypes.h
Complex Text Layout	(no C API)	LayoutEngine, ParagraphLayout
ICU I/O	ustdio.h	ustream.h

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