tolower(3p) [posix man page]
TOLOWER(3P) POSIX Programmer's Manual TOLOWER(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
tolower, tolower_l -- transliterate uppercase characters to lowercase SYNOPSIS
#include <ctype.h> int tolower(int c); int tolower_l(int c, locale_t locale); DESCRIPTION
For tolower(): The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2008 defers to the ISO C standard. The tolower() and tolower_l() functions have as a domain a type int, the value of which is representable as an unsigned char or the value of EOF. If the argument has any other value, the behavior is undefined. If the argument of tolower() or tolower_l() represents an uppercase letter, and there exists a corresponding lowercase letter as defined by character type information in the current locale or in the locale represented by locale, respectively (category LC_CTYPE), the result shall be the corresponding lowercase letter. All other arguments in the domain are returned unchanged. The behavior is undefined if the locale argument to tolower_l() is the special locale object LC_GLOBAL_LOCALE or is not a valid locale object handle. RETURN VALUE
Upon successful completion, the tolower() and tolower_l() functions shall return the lowercase letter corresponding to the argument passed; otherwise, they shall return the argument unchanged. ERRORS
No errors are defined. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
None. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
setlocale(), uselocale() The Base Definitions volume of POSIX.1-2008, Chapter 7, Locale, <ctype.h>, <locale.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 TOLOWER(3P)
Check Out this Related Man Page
TOWLOWER(3P) POSIX Programmer's Manual TOWLOWER(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
towlower, towlower_l -- transliterate uppercase wide-character code to lowercase SYNOPSIS
#include <wctype.h> wint_t towlower(wint_t wc); wint_t towlower_l(wint_t wc, locale_t locale); DESCRIPTION
For towlower(): 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 towlower() and towlower_l() functions have as a domain a type wint_t, the value of which the application shall ensure is a character representable as a wchar_t, and a wide-character code corresponding to a valid character in the current locale or the value of WEOF. If the argument has any other value, the behavior is undefined. If the argument of towlower() or towlower_l() represents an uppercase wide- character code, and there exists a corresponding lowercase wide-character code as defined by character type information in the current locale or in the locale represented by locale, respectively (category LC_CTYPE), the result shall be the corresponding lowercase wide-char- acter code. All other arguments in the domain are returned unchanged. The behavior is undefined if the locale argument to towlower_l() is the special locale object LC_GLOBAL_LOCALE or is not a valid locale object handle. RETURN VALUE
Upon successful completion, the towlower() and towlower_l() functions shall return the lowercase letter corresponding to the argument passed; otherwise, they shall return the argument unchanged. ERRORS
No errors are defined. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
None. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
setlocale(), 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 TOWLOWER(3P)