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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*
* Copyright (C) 1999-2015, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: uinvchar.h
* encoding: UTF-8
* tab size: 8 (not used)
* indentation:2
*
* created on: 2004sep14
* created by: Markus W. Scherer
*
* Definitions for handling invariant characters, moved here from putil.c
* for better modularization.
*/
#ifndef __UINVCHAR_H__
#define __UINVCHAR_H__
#include "unicode/utypes.h"
#ifdef __cplusplus
#include "unicode/unistr.h"
#endif
/**
* Check if a char string only contains invariant characters.
* See utypes.h for details.
*
* @param s Input string pointer.
* @param length Length of the string, can be -1 if NUL-terminated.
* @return TRUE if s contains only invariant characters.
*
* @internal (ICU 2.8)
*/
U_INTERNAL UBool U_EXPORT2
uprv_isInvariantString(const char *s, int32_t length);
/**
* Check if a Unicode string only contains invariant characters.
* See utypes.h for details.
*
* @param s Input string pointer.
* @param length Length of the string, can be -1 if NUL-terminated.
* @return TRUE if s contains only invariant characters.
*
* @internal (ICU 2.8)
*/
U_INTERNAL UBool U_EXPORT2
uprv_isInvariantUString(const UChar *s, int32_t length);
/**
* \def U_UPPER_ORDINAL
* Get the ordinal number of an uppercase invariant character
* @internal
*/
#if U_CHARSET_FAMILY==U_ASCII_FAMILY
# define U_UPPER_ORDINAL(x) ((x)-'A')
#elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
# define U_UPPER_ORDINAL(x) (((x) < 'J') ? ((x)-'A') : \
(((x) < 'S') ? ((x)-'J'+9) : \
((x)-'S'+18)))
#else
# error Unknown charset family!
#endif
/**
* Compare two EBCDIC invariant-character strings in ASCII order.
* @internal
*/
U_INTERNAL int32_t U_EXPORT2
uprv_compareInvEbcdicAsAscii(const char *s1, const char *s2);
/**
* \def uprv_compareInvCharsAsAscii
* Compare two invariant-character strings in ASCII order.
* @internal
*/
#if U_CHARSET_FAMILY==U_ASCII_FAMILY
# define uprv_compareInvCharsAsAscii(s1, s2) uprv_strcmp(s1, s2)
#elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
# define uprv_compareInvCharsAsAscii(s1, s2) uprv_compareInvEbcdicAsAscii(s1, s2)
#else
# error Unknown charset family!
#endif
/**
* Converts an EBCDIC invariant character to lowercase ASCII.
* @internal
*/
U_INTERNAL char U_EXPORT2
uprv_ebcdicToLowercaseAscii(char c);
/**
* \def uprv_invCharToLowercaseAscii
* Converts an invariant character to lowercase ASCII.
* @internal
*/
#if U_CHARSET_FAMILY==U_ASCII_FAMILY
# define uprv_invCharToLowercaseAscii uprv_asciitolower
#elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
# define uprv_invCharToLowercaseAscii uprv_ebcdicToLowercaseAscii
#else
# error Unknown charset family!
#endif
/**
* Copy EBCDIC to ASCII
* @internal
* @see uprv_strncpy
*/
U_INTERNAL uint8_t* U_EXPORT2
uprv_aestrncpy(uint8_t *dst, const uint8_t *src, int32_t n);
/**
* Copy ASCII to EBCDIC
* @internal
* @see uprv_strncpy
*/
U_INTERNAL uint8_t* U_EXPORT2
uprv_eastrncpy(uint8_t *dst, const uint8_t *src, int32_t n);
#endif