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AIX Version 4.3 General Programming Concepts: Writing and Debugging Programs
List of Character Manipulation Subroutines
The character manipulation functions and macros test and translate ASCII
characters.
These functions and macros are of three kinds:
- Character testing
- Character translation
- Miscellaneous character manipulation
The "Programming Example for
Manipulating Characters" illustrates some of the character
manipulation routines.
Character Testing
Use the following functions and macros to determine character type.
Punctuation, alphabetic, and case-querying functions values depend on the current collation table.
The ctype
subroutines contain the following functions:
| isalpha |
Is character alphabetic? |
| isalnum |
Is character alphanumeric? |
| isupper |
Is character uppercase? |
| islower |
Is character lowercase? |
| isdigit |
Is character a digit? |
| isxdigit |
Is character a hex digit? |
| isspace |
Is character a blank-space character? |
| ispunct |
Is character a punctuation character? |
| isprint |
Is character a printing character, including space? |
| isgraph |
Is character a printing character, excluding space? |
| iscntrl |
Is character a control character? |
| isascii |
Is character an integer ASCII character? |
Character Translation
The conv
subroutines contain the following functions:
| toupper |
Converts a lowercase letter to uppercase |
| _toupper |
(Macro) Converts a lowercase letter to uppercase |
| tolower |
Converts an uppercase letter to lowercase |
| _tolower |
(Macro) Converts an uppercase letter to lowercase |
| toascii |
Converts an integer to an ASCII character |
Miscellaneous Character Manipulation
Related Information
National Language Support Overview for
Programming
Programming Example for
Manipulating Characters
Subroutines Overview
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