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1 // Copyright (C) 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4  **********************************************************************
5  *   Copyright (C) 1999-2006, International Business Machines
6  *   Corporation and others.  All Rights Reserved.
7  **********************************************************************
8  *
9  *
10  *  ucnv_io.h:
11  *  defines  variables and functions pertaining to converter name resolution
12  *  aspect of the conversion code
13  */
14 
15 #ifndef UCNV_IO_H
16 #define UCNV_IO_H
17 
18 #include "unicode/utypes.h"
19 
20 #if !UCONFIG_NO_CONVERSION
21 
22 #include "udataswp.h"
23 
24 #define UCNV_AMBIGUOUS_ALIAS_MAP_BIT 0x8000
25 #define UCNV_CONTAINS_OPTION_BIT 0x4000
26 #define UCNV_CONVERTER_INDEX_MASK 0xFFF
27 #define UCNV_NUM_RESERVED_TAGS 2
28 #define UCNV_NUM_HIDDEN_TAGS 1
29 
30 enum {
31     UCNV_IO_UNNORMALIZED,
32     UCNV_IO_STD_NORMALIZED,
33     UCNV_IO_NORM_TYPE_COUNT
34 };
35 
36 typedef struct {
37     uint16_t stringNormalizationType;
38     uint16_t containsCnvOptionInfo;
39 } UConverterAliasOptions;
40 
41 typedef struct UConverterAlias {
42     const uint16_t *converterList;
43     const uint16_t *tagList;
44     const uint16_t *aliasList;
45     const uint16_t *untaggedConvArray;
46     const uint16_t *taggedAliasArray;
47     const uint16_t *taggedAliasLists;
48     const UConverterAliasOptions *optionTable;
49     const uint16_t *stringTable;
50     const uint16_t *normalizedStringTable;
51 
52     uint32_t converterListSize;
53     uint32_t tagListSize;
54     uint32_t aliasListSize;
55     uint32_t untaggedConvArraySize;
56     uint32_t taggedAliasArraySize;
57     uint32_t taggedAliasListsSize;
58     uint32_t optionTableSize;
59     uint32_t stringTableSize;
60     uint32_t normalizedStringTableSize;
61 } UConverterAlias;
62 
63 /**
64  * \var ucnv_io_stripForCompare
65  * Remove the underscores, dashes and spaces from the name, and convert
66  * the name to lower case.
67  * @param dst The destination buffer, which is <= the buffer of name.
68  * @param dst The destination buffer, which is <= the buffer of name.
69  * @see ucnv_compareNames
70  * @return the destination buffer.
71  */
72 #if U_CHARSET_FAMILY==U_ASCII_FAMILY
73 #   define ucnv_io_stripForCompare ucnv_io_stripASCIIForCompare
74 #elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
75 #   define ucnv_io_stripForCompare ucnv_io_stripEBCDICForCompare
76 #else
77 #   error U_CHARSET_FAMILY is not valid
78 #endif
79 
80 U_CAPI char * U_CALLCONV
81 ucnv_io_stripASCIIForCompare(char *dst, const char *name);
82 
83 U_CAPI char * U_CALLCONV
84 ucnv_io_stripEBCDICForCompare(char *dst, const char *name);
85 
86 /**
87  * Map a converter alias name to a canonical converter name.
88  * The alias is searched for case-insensitively, the converter name
89  * is returned in mixed-case.
90  * Returns NULL if the alias is not found.
91  * @param alias The alias name to be searched.
92  * @param containsOption A return value stating whether the returned converter name contains an option (a comma)
93  * @param pErrorCode The error code
94  * @return the converter name in mixed-case, return NULL if the alias is not found.
95  */
96 U_CAPI const char *
97 ucnv_io_getConverterName(const char *alias, UBool *containsOption, UErrorCode *pErrorCode);
98 
99 /**
100  * Return the number of all known converter names (no aliases).
101  * @param pErrorCode The error code
102  * @return the number of all aliases
103  */
104 U_CAPI uint16_t
105 ucnv_io_countKnownConverters(UErrorCode *pErrorCode);
106 
107 /**
108  * Swap an ICU converter alias table. See implementation for details.
109  * @internal
110  */
111 U_CAPI int32_t U_EXPORT2
112 ucnv_swapAliases(const UDataSwapper *ds,
113                  const void *inData, int32_t length, void *outData,
114                  UErrorCode *pErrorCode);
115 
116 #endif
117 
118 #endif /* _UCNV_IO */
119 
120 /*
121  * Hey, Emacs, please set the following:
122  *
123  * Local Variables:
124  * indent-tabs-mode: nil
125  * End:
126  *
127  */
128