---
name: "m17nChartable"
section: "3m17n"
platform: "linux"
package: "m17n-docs"
version: "1.8.4-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/m17nChartable"
---

# m17nChartable(3m17n)

\- Chartable objects and API for them.

## NAME

m17nChartable\_-\_Chart -  - Chartable objects and API for them.

## SYNOPSIS

### Typedefs

typedef struct **MCharTable** **MCharTable**\
 Type of chartables.

### Functions

**MCharTable** \* **mchartable** (MSymbol key, void \*default\_value)\
 Create a new chartable.  int **mchartable\_min\_char** (**MCharTable** \*table)\
 Return the minimum character whose value is set in a chartabe.  int **mchartable\_max\_char** (**MCharTable** \*table)\
 Return the maximum character whose value is set in a chartabe.  void \* **mchartable\_lookup** (**MCharTable** \*table, int c)\
 Return the assigned value of a character in a chartable.  int **mchartable\_set** (**MCharTable** \*table, int c, void \*val)\
 Assign a value to a character in a chartable.  int **mchartable\_set\_range** (**MCharTable** \*table, int from, int to, void \*val)\
 Assign a value to the characters in the specified range.  void **mchartable\_range** (**MCharTable** \*table, int \*from, int \*to)\
 Search for characters that have non-default value.  int **mchartable\_map** (**MCharTable** \*table, void \*ignore, void(\*func)(int, int, void \*, void \*), void \*func\_arg)\
 Call a function for characters in a chartable.

### Variables

MSymbol **Mchar\_table**\

## Detailed Description

Chartable objects and API for them.

Symbol whose name is 'char-table'.

The m17n library supports enormous number of characters. Thus, if attributes of each character are to be stored in a simple array, such an array would be impractically big. The attributes usually used, however, are often assigned only to a range of characters. Even when all characters have attributes, characters of consecutive character code tend to have the same attribute values.

The m17n library utilizes this tendency to store characters and their attribute values efficiently in an object called *Chartable*. Although a chartable object is not a simple array, application programs can handle a chartable as if it is an array. Attribute values of a character can be obtained by accessing a Chartable for the attribute with the character code of the specified character.

A chartable is a managed object. \

The symbol `Mchar_table` has the name `'char-table'`. \

## Typedef Documentation

### typedef struct MCharTable MCharTable

Type of chartables. \<\>

The type **MCharTable** is for a *chartable* objects. Its internal structure is concealed from application programs. \

## Variable Documentation

### MSymbol Mchar\_table

## Author

Generated automatically by Doxygen for The m17n Library from the source code.

## COPYRIGHT

Copyright (C) 2001 Information-technology Promotion Agency (IPA)\
 Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)\
 Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License  \<http://www.gnu.org/licenses/fdl.html\>.