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
28 U_NAMESPACE_USE
29
getCString(const UnicodeString * uString)30 char *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
getCString(const LEUnicode16 * uChars)46 char *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
getUTF8String(const UnicodeString * uString)57 char *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
freeCString(char * cString)74 void freeCString(char *cString)
75 {
76 DELETE_ARRAY(cString);
77 }
78
getRTL(const UnicodeString & text)79 le_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
getLanguageCode(const char * lang)97 le_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