iswalpha(3p) [posix man page]
ISWALPHA(3P) POSIX Programmer's Manual ISWALPHA(3P) PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
iswalpha, iswalpha_l -- test for an alphabetic wide-character code SYNOPSIS
#include <wctype.h> int iswalpha(wint_t wc); int iswalpha_l(wint_t wc, locale_t locale); DESCRIPTION
For iswalpha(): The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the require- ments described here and the ISO C standard is unintentional. This volume of POSIX.1-2008 defers to the ISO C standard. The iswalpha() and iswalpha_l() functions shall test whether wc is a wide-character code representing a character of class alpha in the current locale, or in the locale represented by locale, respectively; see the Base Definitions volume of POSIX.1-2008, Chapter 7, Locale. The wc argument is a wint_t, the value of which the application shall ensure is a wide-character code corresponding to a valid character in the current locale, or equal to the value of the macro WEOF. If the argument has any other value, the behavior is undefined. The behavior is undefined if the locale argument to iswalpha_l() is the special locale object LC_GLOBAL_LOCALE or is not a valid locale object handle. RETURN VALUE
The iswalpha() and iswalpha_l() functions shall return non-zero if wc is an alphabetic wide-character code; otherwise, they shall return 0. ERRORS
No errors are defined. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
To ensure applications portability, especially across natural languages, only these functions and the functions in the reference pages listed in the SEE ALSO section should be used for character classification. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
iswalnum(), iswcntrl(), iswctype(), iswdigit(), iswgraph(), iswlower(), iswprint(), iswpunct(), iswspace(), iswupper(), iswxdigit(), setlo- cale(), uselocale() The Base Definitions volume of POSIX.1-2008, Chapter 7, Locale, <locale.h>, <wctype.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Stan- dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html . Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html . IEEE
/The Open Group 2013 ISWALPHA(3P)
Check Out this Related Man Page
ISWUPPER(3P) POSIX Programmer's Manual ISWUPPER(3P) PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
iswupper, iswupper_l -- test for an uppercase letter wide-character code SYNOPSIS
#include <wctype.h> int iswupper(wint_t wc); int iswupper_l(wint_t wc, locale_t locale); DESCRIPTION
For iswupper(): The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the require- ments described here and the ISO C standard is unintentional. This volume of POSIX.1-2008 defers to the ISO C standard. The iswupper() and iswupper_l() functions shall test whether wc is a wide-character code representing a character of class upper in the current locale, or in the locale represented by locale, respectively; see the Base Definitions volume of POSIX.1-2008, Chapter 7, Locale. The wc argument is a wint_t, the value of which the application shall ensure is a wide-character code corresponding to a valid character in the current locale, or equal to the value of the macro WEOF. If the argument has any other value, the behavior is undefined. The behavior is undefined if the locale argument to iswupper_l() is the special locale object LC_GLOBAL_LOCALE or is not a valid locale object handle. RETURN VALUE
The iswupper() and iswupper_l() functions shall return non-zero if wc is an uppercase letter wide-character code; otherwise, they shall return 0. ERRORS
No errors are defined. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
To ensure applications portability, especially across natural languages, only these functions and the functions in the reference pages listed in the SEE ALSO section should be used for character classification. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
iswalnum(), iswalpha(), iswcntrl(), iswctype(), iswdigit(), iswgraph(), iswlower(), iswprint(), iswpunct(), iswspace(), iswxdigit(), setlo- cale(), uselocale() The Base Definitions volume of POSIX.1-2008, Chapter 7, Locale, <locale.h>, <wctype.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Stan- dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html . Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html . IEEE
/The Open Group 2013 ISWUPPER(3P)