1 TOUPPER(3C)              Standard C Library Functions              TOUPPER(3C)
   2 
   3 
   4 
   5 NAME
   6        toupper, toupper_l - transliterate lower-case characters to upper-case
   7 
   8 SYNOPSIS
   9        #include <ctype.h>
  10 
  11        int toupper(int c);
  12 
  13        int toupper_l(int c, locale_t loc);
  14 
  15 
  16 DESCRIPTION
  17        The toupper() function has as a domain of type int, the value of which
  18        is representable as an unsigned char or the value of EOF. If the
  19        argument has any other value, the argument is returned unchanged. If
  20        the argument of toupper() represents a lower-case letter, and there
  21        exists a corresponding upper-case letter (as defined by character type
  22        information in the locale category LC_CTYPE),   the result is the
  23        corresponding upper-case letter. All other arguments in the domain are
  24        returned unchanged.
  25 
  26        The function toupper_l() behaves identically to toupper(), except
  27        instead of operating in the current locale, it operates in the locale
  28        specified by loc.
  29 
  30        A macro form, _toupper() exists. It is defined for standards
  31        conformance, particularly with legacy standards. It was deprecated in
  32        POSIX 2008 (Issue 7), and its use is discouraged. The macro, on this
  33        system, is just an alias for toupper().
  34 
  35 RETURN VALUES
  36        On successful completion, toupper() returns the upper-case letter
  37        corresponding to the argument passed.
  38 
  39 ERRORS
  40        No errors are defined.
  41 
  42 ATTRIBUTES
  43        See attributes(5) for descriptions of the following attributes:
  44 
  45        +--------------------+-----------------+
  46        |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
  47        +--------------------+-----------------+
  48        |CSI                 | Enabled         |
  49        +--------------------+-----------------+
  50        |Interface Stability | Standard        |
  51        +--------------------+-----------------+
  52        |MT-Level            | MT-Safe         |
  53        +--------------------+-----------------+
  54 
  55 SEE ALSO
  56        newlocale(3C), setlocale(3C), uselocale(3C), attributes(5),
  57        standards(5)
  58 
  59 
  60 
  61                                 October 4, 2015                    TOUPPER(3C)