Conversion Utilities

The conversion functions described in this section are available, but you should use iconv() as a standard function.

Simplified Chinese Solaris software provides facilities for various conversions, for example:

• Characters within a code set, such as converting uppercase ASCII to lowercase.

• Between different conventions for national standard character sets, such as GB and EUC.

• Between code formats (such as converting between EUC and WC).

Programs using the general multibyte conversion utilities should include the header files widec.h and wctype.h. Simplified Chinese Solaris specific routines (such as iscxxx) are declared in zh/xctype.h.

Programs using general multibyte conversion utilities should include three header files: wctype.h, widec.h, and zh/xctype.h.

The locale/xctype.h file declares the Chinese locale-specific routines, which have names of the form iscxxxx:

As with the classification functions described in the previous section, the use of these functions can be controlled by the setlocale function (described elsewhere in this and other chapters).

Locale-specific conversion routines (such as Chinese cgbtoeuc) are contained in the libcle library:

This library can be linked during compilation using the C compiler option -lcle.

Conversion Within a Code Set

The multibyte conversion functions are similar to the one-byte conversion functions toupper and tolower. These functions convert wide-characters to other wide characters. For more information on conversion routines, see the man pages for wconv(3) and cconv(3).

The following routines are in the regular Chinese C library.

Table 12–3 Simplified Chinese Case Conversion Functions (declared in zh/xctype.h)

Function	Description
tocupper	Converts code set1 Roman lowercase to uppercase
toclower	Converts code set1 Roman uppercase to lowercase

Conversion Between Simplified Chinese Code Sets

In the Simplified Chinese character sets, the Roman characters and numbers in code set 0 are repeated in code set 1. The following functions test wide characters.

Table 12–4 Simplified Chinese Code Set Conversion Functions

Function	Description
atocgb	Converts alphabetic or numeric characters in ASCII (code set0) to the corresponding characters in GB-2312-80 (code set1).
cgbtoa	Converts alphabetic or numeric characters in GB-2312-80 (code set1) to the corresponding characters in ASCII (code set0).

For further information on these functions, see the man page for cconv()(3x).