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TOUPPER(3) BSD Library Functions Manual TOUPPER(3) NAME toupper, toupper_l -- lower case to upper case letter conversion LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <ctype.h> int toupper(int c); #include <ctype.h> #include <xlocale.h> int toupper_l(int c, locale_t loc); DESCRIPTION The toupper() function converts a lower-case letter to the corresponding upper-case letter. For single C chars locales (see multibyte(3)), the value of the argument is representable as an unsigned char or the value of EOF. Although the toupper() function uses the current locale, the toupper_l() function may be passed a locale directly. See xlocale(3) for more infor-mation. information. mation. RETURN VALUES If the argument is a lower-case letter, the toupper() function returns the corresponding upper-case letter if there is one; otherwise, the argu-ment argument ment is returned unchanged. 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 towupper() function should be used instead. SEE ALSO ctype(3), isupper(3), multibyte(3), towupper(3), xlocale(3) STANDARDS The toupper() function conforms to ISO/IEC 9899:1990 (``ISO C90''). BSD August 21, 2004 BSD |