The ifx_gl_ismblank() function
The ifx_gl_ismblank() function determines whether a multibyte character contains a horizontal-space character.
Syntax
#include <ifxgls.h>
...
int ifx_gl_ismblank(mb, mb_byte_limit)
gl_mchar_t *mb;
int mb_byte_limit;- mb
- A pointer to the multibyte character whose character classification you want to determine.
- mb_byte_limit
- The integer number of bytes to read from mb to try to form a complete multibyte character. If mb_byte_limit is IFX_GL_NO_LIMIT, the ifx_gl_ismblank() function reads as many bytes as necessary from mb to form a complete character. For more information about mb_byte_limit, see Multibyte-character termination.
| Valid in client application | Valid in DataBlade® UDR |
|---|---|
| Yes | Yes |
Usage
The ifx_gl_ismblank() function tests whether mb is in the blank character class according to the rules of the current locale. The blank character class includes the single-byte space (ASCII 0x020) and tab character (ASCII 0x009, ^I) plus any multibyte version of these characters that the locale defines. Characters in the blank class are also in the space class. No characters in the upper, lower, alpha, digit, xdigit, punct, or graph classes are in the blank class.
Locale information
The LC_CTYPE category of the current locale affects the behavior of this function because it defines the blank character class.
Return values
- >0
- The *mb character is in the blank character class.
- 0
- The function was not successful, and the error number is set to indicate the cause. See the Errors section.
Errors
This function does not return a unique
value to indicate an error. If an error occurred, the function returns
0 and sets the ifx_gl_lc_errno() error number to
one of the following values.
- IFX_GL_EILSEQ
- The *mb value is not a valid multibyte character.
- IFX_GL_EINVAL
- The function cannot determine whether mb is a valid multibyte character because it would need to read more than mb_byte_limit bytes from mb. If mb_byte_limit is less than or equal to 0, this function always returns this error.