TOUPPER(3)                 POSIX Programmer's Manual                TOUPPER(3)



PPRROOLLOOGG
       This manual page is part of the POSIX Programmer's Manual.  The OS
       implementation of this interface may differ (consult the corresponding
       OS manual page for details of OS behavior), or the interface may not be
       implemented on OS.


NNAAMMEE
       toupper, toupper_l -- transliterate lowercase characters to uppercase

SSYYNNOOPPSSIISS
       #include <ctype.h>

       int toupper(int _c);
       int toupper_l(int _c, locale_t _l_o_c_a_l_e);

DDEESSCCRRIIPPTTIIOONN
       For _t_o_u_p_p_e_r(): 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 _t_o_u_p_p_e_r() and _t_o_u_p_p_e_r___l() functions have as a domain a type iinntt,
       the value of which is representable as an uunnssiiggnneedd cchhaarr or the value of
       EOF. If the argument has any other value, the behavior is undefined.

       If the argument of _t_o_u_p_p_e_r() or _t_o_u_p_p_e_r___l() represents a lowercase
       letter, and there exists a corresponding uppercase letter as defined by
       character type information in the current locale or in the locale
       represented by _l_o_c_a_l_e, respectively (category _L_C___C_T_Y_P_E), the result
       shall be the corresponding uppercase letter.

       All other arguments in the domain are returned unchanged.

       The behavior is undefined if the _l_o_c_a_l_e argument to _t_o_u_p_p_e_r___l() is the
       special locale object LC_GLOBAL_LOCALE or is not a valid locale object
       handle.

RREETTUURRNN VVAALLUUEE
       Upon successful completion, _t_o_u_p_p_e_r() and _t_o_u_p_p_e_r___l() shall return the
       uppercase letter corresponding to the argument passed; otherwise, they
       shall return the argument unchanged.

EERRRROORRSS
       No errors are defined.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

EEXXAAMMPPLLEESS
       None.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       None.

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _s_e_t_l_o_c_a_l_e(), _u_s_e_l_o_c_a_l_e()

       The Base Definitions volume of POSIX.1-2008, _C_h_a_p_t_e_r _7, _L_o_c_a_l_e,
       <<ccttyyppee..hh>>, <<llooccaallee..hh>>

CCOOPPYYRRIIGGHHTT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       -- 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 Standard
       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                           TOUPPER(3)
