Class: ICU::Transliterator

Inherits:
Object
  • Object
show all
Defined in:
lib/icu/transliterator.rb,
ext/icu/icu_transliterator.c

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Object 



40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
 
# File 'ext/icu/icu_transliterator.c', line 40

VALUE transliterator_initialize(int argc, VALUE* argv, VALUE self)
{
    GET_TRANSLITERATOR(this);
    this->rb_instance = self;
    this->service = NULL;

    VALUE id;
    VALUE direction;
    VALUE rules;
    rb_scan_args(argc, argv, "12", &id, &rules, &direction);
    StringValue(id);
    if (!NIL_P(rules)) {
        StringValue(rules);
    }
    if (NIL_P(direction)) {
        direction = ID2SYM(ID_forward);
    } else {
        // TODO: handle invalid direction
    }

    VALUE u_id = icu_ustring_from_rb_str(id);
    UTransDirection u_direction = UTRANS_REVERSE;
    if (SYM2ID(direction) == ID_forward) {
        u_direction = UTRANS_FORWARD;
    }
    VALUE u_rules;
    if (!NIL_P(rules)) {
        u_rules = icu_ustring_from_rb_str(rules);
    }
    UParseError parser_error;
    UErrorCode status = U_ZERO_ERROR;
    this->service = utrans_openU(icu_ustring_ptr(u_id),
                                        icu_ustring_len(u_id),
                                        u_direction,
                                        NIL_P(rules) ? NULL : icu_ustring_ptr(u_rules),
                                        NIL_P(rules) ? 0 : icu_ustring_len(u_rules),
                                        &parser_error, // TODO: should be possible to interpolate
                                        &status);
    if (U_FAILURE(status)) {
        icu_rb_raise_icu_error(status);
    }
    if (this->service == NULL) {
        rb_raise(rb_eICU_Error, "Transliterator can't be created.");
    }

    return self;
}

Class Method Details

.available_ids ⇒ Object 



136
137
138
139
140
141
 
# File 'ext/icu/icu_transliterator.c', line 136

VALUE transliterator_available_ids(VALUE self)
{
    UErrorCode status = U_ZERO_ERROR;
    UEnumeration* open_ids = utrans_openIDs(&status);
    return icu_enum_to_rb_ary(open_ids, status, 650);
}

.transliterate(id, str, rules = nil, direction = nil) ⇒ Object 



3
4
5
6
 
# File 'lib/icu/transliterator.rb', line 3

def self.transliterate(id, str, rules = nil, direction = nil)
  self.new(id, rules, direction)
      .transliterate(str)
end

Instance Method Details

#transliterate(str) ⇒ Object 



88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
 
# File 'ext/icu/icu_transliterator.c', line 88

VALUE transliterator_transliterate(VALUE self, VALUE str)
{
    StringValue(str);
    GET_TRANSLITERATOR(this);

    VALUE u_str = icu_ustring_from_rb_str(str);
    UErrorCode status = U_ZERO_ERROR;
    int32_t original_len = icu_ustring_len(u_str);
    int32_t capa = icu_ustring_capa(u_str);
    int32_t len;
    int32_t limit;
    int retried = FALSE;
    do {
        len = limit = original_len;

        utrans_transUChars(this->service,
                           icu_ustring_ptr(u_str), &len, capa,
                           0 /* always start from the beginning */, &limit,
                           &status);

        if (!retried && status == U_BUFFER_OVERFLOW_ERROR) {
            retried = TRUE;
            u_str = icu_ustring_from_rb_str(str);
            capa = len + RUBY_C_STRING_TERMINATOR_SIZE;
            icu_ustring_resize(u_str, capa);
            status = U_ZERO_ERROR;
        } else if (U_FAILURE(status)) {
            icu_rb_raise_icu_error(status);
        } else { // retried == true && U_SUCCESS(status)
            break;
        }
    } while (retried);

    return icu_ustring_to_rb_enc_str_with_len(u_str, len);
}

#unicode_id ⇒ Object 



124
125
126
127
128
129
130
131
132
133
134
 
# File 'ext/icu/icu_transliterator.c', line 124

VALUE transliterator_unicode_id(VALUE self)
{
    GET_TRANSLITERATOR(this);

    int32_t result_len = 0;
    const UChar* result = utrans_getUnicodeID(this->service, &result_len);
    VALUE str = icu_ustring_from_uchar_str(result, result_len);
    VALUE rb_str = icu_ustring_to_rb_enc_str(str);
    icu_ustring_clear_ptr(str);
    return rb_str;
}