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ICU-542 implement case mapping conditions from Unicode 3.1 (az & lt)

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X-SVN-Rev: 3548
This commit is contained in:
Markus Scherer 2001-02-02 23:24:40 +00:00
parent 2ea8bf637f
commit 81401a40b2
1 changed files with 50 additions and 17 deletions
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67
icu4c/source/common/uchar.c
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@ -920,9 +920,30 @@ void u_getUnicodeVersion(UVersionInfo versionArray) {
enum {
LOC_ROOT,
LOC_TURKISH
LOC_TURKISH,
LOC_LITHUANIAN
};
static int32_t
getCaseLocale(const char *locale) {
if(locale==NULL) {
locale=uloc_getDefault();
if(locale==NULL) {
return LOC_ROOT;
}
}
if( ((locale[0]=='t' && locale[1]=='r') ||
(locale[0]=='a' && locale[1]=='z')) &&
(locale[2]=='_' || locale[2]==0)
) {
return LOC_TURKISH;
} else if(locale[0]=='l' && locale[1]=='t' && (locale[2]=='_' || locale[2]==0)) {
return LOC_LITHUANIAN;
} else {
return LOC_ROOT;
}
}
U_CFUNC int32_t
u_internalStrToLower(UChar *dest, int32_t destCapacity,
const UChar *src, int32_t srcLength,
@ -971,14 +992,7 @@ u_internalStrToLower(UChar *dest, int32_t destCapacity,
/* set up local variables */
uchars=(const UChar *)(props32Table+indexes[INDEX_UCHARS]);
if(locale==NULL) {
locale=uloc_getDefault();
}
if(locale[0]=='t' && locale[1]=='r' && (locale[2]=='_' || locale[2]==0)) {
loc=LOC_TURKISH;
} else {
loc=LOC_ROOT;
}
loc=getCaseLocale(locale);
/* case mapping loop */
srcIndex=destIndex=0;
@ -1158,14 +1172,7 @@ u_internalStrToUpper(UChar *dest, int32_t destCapacity,
/* set up local variables */
uchars=(const UChar *)(props32Table+indexes[INDEX_UCHARS]);
if(locale==NULL) {
locale=uloc_getDefault();
}
if(locale[0]=='t' && locale[1]=='r' && (locale[2]=='_' || locale[2]==0)) {
loc=LOC_TURKISH;
} else {
loc=LOC_ROOT;
}
loc=getCaseLocale(locale);
/* case mapping loop */
srcIndex=destIndex=0;
@ -1197,6 +1204,32 @@ u_internalStrToUpper(UChar *dest, int32_t destCapacity,
buffer[0]=0x49;
}
i=1;
} else if(c==0x307) {
if(loc==LOC_LITHUANIAN) {
/* lithuanian: remove DOT ABOVE after U+0069 "i" with upper or titlecase */
/* ### TODO: test this with Unicode 3.1 SpecialCasing.txt */
/* search backwards for the base letter - this works only because src and dest do not overlap! */
i=srcIndex;
while(i>0) {
UTF_PREV_CHAR(src, 0, i, c);
props=GET_PROPS_UNSAFE(c);
if(GET_CATEGORY(props)!=U_NON_SPACING_MARK) { /* Mn */
break;
}
}
/* is the base letter an 'i' (U+0069)? */
if(c==0x69) {
/* yes, remove the dot (continue without output) */
continue;
} else {
/* no, keep the dot */
buffer[0]=0x307;
}
} else {
/* other languages: keep the dot */
buffer[0]=0x307;
}
i=1;
} else {
/* no known conditional special case mapping, output the code point itself */
i=0;