Implementation Dependency - Locale-Specific Behavior (F.4)

IBM C/C++ Compilers defines the following locale-specific behavior:

• The local time zone and daylight saving time are set by the operating system. (4.12.1)
• The era for the clock function starts when the process containing the program is started. (4.12.2.1)
• The locale determines the characters of the execution set. Some locales contain characters other than those required by the C standard. (2.2.1)
• The direction of printing is left to right. (2.2.2)
• The decimal point character is locale-specific. For the United States English locale, it is the period. (4.1.1)
• The format of the time and date is specified by the format parameter of the strftime function. It is a character string containing two types of objects: plain characters that are simply placed in the output string, and conversion specifications for presenting the time and date in a readable form. Each conversion specification is a sequence of this form (4.12.3.5),

where:

hyphen	Is the - character. It puts padding on the right of the converted value instead of on the left if needed.
width	Is the minimum field width.
precision	Is the maximum field width.
type	Is specified by one or two conversion characters. The characters and their meanings are:
	%D	Represents the date in the format %m/%d/%y (for example, 01/31/92)
	%e	Represents the day of the month as a decimal number (1 to 31), with a leading space if needed
	%E	Represents the combined alternative era year and name for the locale, in %o %N format
	%h	Represents the abbreviated month name for the locale (for example, Jan)
	%n	Is a new-line character
	%N	Represents the alternative era name for the locale
	%o	Represents the alternative era year for the locale
	%r	12 hour clock format with AM/PM notation, which is the same as $I:$M:$S [AM|PM]
	%t	Is a tab character
	%T	24 hour clock time in the format %H:%M:%S (for example, 16:55:15)

Refer to the AIX Version 4 Technical Reference, Volumes 1 and 2: Base Operating System and Extensions for more information about time and date formatting and the strftime function.

Character Testing and Case Mapping
The execution character set follows the ASCII collating sequence (4.3 and 4.11.4.4):

• The control characters representing horizontal tab, vertical tab, and form feed (ASCII 0-31)
• The space character
• ! " # $ % & ' ( ) * + , - . /
• 0 1 2 3 4 5 6 7 8 9
• : ; <=> ? @
• A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
• [ \ ] ^ _ `
• a b c d e f g h i j k l m n o p q r s t u v w x y z
• { | } ~
• delete

Implementation-Defined Behavior
Implementation Dependencies