ADC Home > Reference Library > Reference > Mac OS X > Mac OS X Man Pages
|
This document is a Mac OS X manual page. Manual pages are a command-line technology for providing documentation. You can view these manual pages locally using the man(1) command. These manual pages come from many different sources, and thus, have a variety of writing styles. For more information about the manual page format, see the manual page for manpages(5). |
ISBLANK(3) BSD Library Functions Manual ISBLANK(3) NAME isblank -- space or tab character test LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <ctype.h> int isblank(int c); DESCRIPTION The isblank() function tests for a space or tab character. For any locale, this includes the following standard characters: ``\t'' `` '' In the "C" locale, isblank() successful test is limited to these charac-ters characters ters only. For single C chars locales (see multibyte(3)), the value of the argument is representable as an unsigned char or the value of EOF. COMPATIBILITY The 4.4BSD extension of accepting arguments outside of the range of the unsigned char type in locales with large character sets is considered obsolete and may not be supported in future releases. The iswblank() function should be used instead. RETURN VALUES The isblank() function returns zero if the character tests false and returns non-zero if the character tests true. SEE ALSO ctype(3), isalnum_l(3), iswblank(3), multibyte(3), ascii(7) STANDARDS The isblank() function conforms to ISO/IEC 9899:1999 (``ISO C99''). BSD August 21, 2004 BSD |