1/*
2 *******************************************************************************
3 *
4 *   Copyright (C) 1999-2008, International Business Machines
5 *   Corporation and others.  All Rights Reserved.
6 *
7 *******************************************************************************
8 *   file name:  letsutil.cpp
9 *
10 *   created on: 04/25/2006
11 *   created by: Eric R. Mader
12 */
13
14#include "unicode/utypes.h"
15#include "unicode/unistr.h"
16#include "unicode/ubidi.h"
17
18#include "layout/LETypes.h"
19#include "layout/LEScripts.h"
20#include "layout/LayoutEngine.h"
21#include "layout/LELanguages.h"
22
23#include "OpenTypeLayoutEngine.h"
24
25#include "letest.h"
26#include "letsutil.h"
27
28U_NAMESPACE_USE
29
30char *getCString(const UnicodeString *uString)
31{
32    if (uString == NULL) {
33        return NULL;
34    }
35
36    le_int32 uLength = uString->length();
37    le_int32 cLength = uString->extract(0, uLength, NULL, 0, US_INV);
38    char *cString = NEW_ARRAY(char, cLength + 1);
39
40    uString->extract(0, uLength, cString, cLength, US_INV);
41    cString[cLength] = '\0';
42
43    return cString;
44}
45
46char *getCString(const LEUnicode16 *uChars)
47{
48    if (uChars == NULL) {
49        return NULL;
50    }
51
52    const UnicodeString ustring(uChars);
53
54    return getCString(&ustring);
55}
56
57char *getUTF8String(const UnicodeString *uString)
58{
59    if (uString == NULL) {
60        return NULL;
61    }
62
63    le_int32 uLength = uString->length();
64    le_int32 cLength = uString->extract(0, uLength, NULL, 0, "UTF-8");
65    char *cString = NEW_ARRAY(char, cLength + 1);
66
67    uString->extract(0, uLength, cString, cLength, "UTF-8");
68
69    cString[cLength] = '\0';
70
71    return cString;
72}
73
74void freeCString(char *cString)
75{
76    DELETE_ARRAY(cString);
77}
78
79le_bool getRTL(const UnicodeString &text)
80{
81    UBiDiLevel level = 0;
82    UErrorCode status = U_ZERO_ERROR;
83    le_int32 charCount = text.length();
84    le_int32 limit = -1;
85    UBiDi *ubidi = ubidi_openSized(charCount, 0, &status);
86
87    ubidi_setPara(ubidi, text.getBuffer(), charCount, UBIDI_DEFAULT_LTR, NULL, &status);
88
89    // TODO: Should check that there's only a single logical run...
90    ubidi_getLogicalRun(ubidi, 0, &limit, &level);
91
92    ubidi_close(ubidi);
93
94    return level & 1;
95}
96
97le_int32 getLanguageCode(const char *lang)
98{
99    if (strlen(lang) != 3) {
100        return -1;
101    }
102
103    LETag langTag = (LETag) ((lang[0] << 24) + (lang[1] << 16) + (lang[2] << 8) + 0x20);
104
105    for (le_int32 i = 0; i < languageCodeCount; i += 1) {
106        if (langTag == OpenTypeLayoutEngine::languageTags[i]) {
107            return i;
108        }
109    }
110
111    return -1;
112}
113
114