1/*
2*******************************************************************************
3*
4*   Copyright (C) 1999-2010, International Business Machines
5*   Corporation and others.  All Rights Reserved.
6*
7*******************************************************************************
8*   file name:  uinvchar.h
9*   encoding:   US-ASCII
10*   tab size:   8 (not used)
11*   indentation:2
12*
13*   created on: 2004sep14
14*   created by: Markus W. Scherer
15*
16*   Definitions for handling invariant characters, moved here from putil.c
17*   for better modularization.
18*/
19
20#ifndef __UINVCHAR_H__
21#define __UINVCHAR_H__
22
23#include "unicode/utypes.h"
24
25/**
26 * Check if a char string only contains invariant characters.
27 * See utypes.h for details.
28 *
29 * @param s Input string pointer.
30 * @param length Length of the string, can be -1 if NUL-terminated.
31 * @return TRUE if s contains only invariant characters.
32 *
33 * @internal (ICU 2.8)
34 */
35U_INTERNAL UBool U_EXPORT2
36uprv_isInvariantString(const char *s, int32_t length);
37
38/**
39 * Check if a Unicode string only contains invariant characters.
40 * See utypes.h for details.
41 *
42 * @param s Input string pointer.
43 * @param length Length of the string, can be -1 if NUL-terminated.
44 * @return TRUE if s contains only invariant characters.
45 *
46 * @internal (ICU 2.8)
47 */
48U_INTERNAL UBool U_EXPORT2
49uprv_isInvariantUString(const UChar *s, int32_t length);
50
51/**
52 * \def U_UPPER_ORDINAL
53 * Get the ordinal number of an uppercase invariant character
54 * @internal
55 */
56#if U_CHARSET_FAMILY==U_ASCII_FAMILY
57#   define U_UPPER_ORDINAL(x) ((x)-'A')
58#elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
59#   define U_UPPER_ORDINAL(x) (((x) < 'J') ? ((x)-'A') : \
60                              (((x) < 'S') ? ((x)-'J'+9) : \
61                               ((x)-'S'+18)))
62#else
63#   error Unknown charset family!
64#endif
65
66/**
67 * Compare two EBCDIC invariant-character strings in ASCII order.
68 * @internal
69 */
70U_INTERNAL int32_t U_EXPORT2
71uprv_compareInvEbcdicAsAscii(const char *s1, const char *s2);
72
73/**
74 * \def uprv_compareInvCharsAsAscii
75 * Compare two invariant-character strings in ASCII order.
76 * @internal
77 */
78#if U_CHARSET_FAMILY==U_ASCII_FAMILY
79#   define uprv_compareInvCharsAsAscii(s1, s2) uprv_strcmp(s1, s2)
80#elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
81#   define uprv_compareInvCharsAsAscii(s1, s2) uprv_compareInvEbcdicAsAscii(s1, s2)
82#else
83#   error Unknown charset family!
84#endif
85
86/**
87 * Converts an EBCDIC invariant character to lowercase ASCII.
88 * @internal
89 */
90U_INTERNAL char U_EXPORT2
91uprv_ebcdicToLowercaseAscii(char c);
92
93/**
94 * \def uprv_invCharToLowercaseAscii
95 * Converts an invariant character to lowercase ASCII.
96 * @internal
97 */
98#if U_CHARSET_FAMILY==U_ASCII_FAMILY
99#   define uprv_invCharToLowercaseAscii uprv_asciitolower
100#elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
101#   define uprv_invCharToLowercaseAscii uprv_ebcdicToLowercaseAscii
102#else
103#   error Unknown charset family!
104#endif
105
106/**
107 * Copy EBCDIC to ASCII
108 * @internal
109 * @see uprv_strncpy
110 */
111U_INTERNAL uint8_t* U_EXPORT2
112uprv_aestrncpy(uint8_t *dst, const uint8_t *src, int32_t n);
113
114
115/**
116 * Copy ASCII to EBCDIC
117 * @internal
118 * @see uprv_strncpy
119 */
120U_INTERNAL uint8_t* U_EXPORT2
121uprv_eastrncpy(uint8_t *dst, const uint8_t *src, int32_t n);
122
123
124
125#endif
126