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ICU-12031 StandardPlural from UnicodeString

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X-SVN-Rev: 38134
This commit is contained in:
Markus Scherer 2015-12-16 04:21:28 +00:00
parent 4f959e2bc7
commit 8c6d77a375
2 changed files with 81 additions and 1 deletions
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37
icu4c/source/i18n/standardplural.cpp
View File

@ -13,6 +13,7 @@
#if !UCONFIG_NO_FORMATTING
#include "unicode/unistr.h"
#include "cstring.h"
#include "standardplural.h"
#include "uassert.h"
@ -63,6 +64,42 @@ int32_t StandardPlural::indexOrNegativeFromString(const char *keyword) {
return -1;
}
static const UChar gZero[] = { 0x7A, 0x65, 0x72, 0x6F };
static const UChar gOne[] = { 0x6F, 0x6E, 0x65 };
static const UChar gTwo[] = { 0x74, 0x77, 0x6F };
static const UChar gFew[] = { 0x66, 0x65, 0x77 };
static const UChar gMany[] = { 0x6D, 0x61, 0x6E, 0x79 };
static const UChar gOther[] = { 0x6F, 0x74, 0x68, 0x65, 0x72 };
int32_t StandardPlural::indexOrNegativeFromString(const UnicodeString &keyword) {
switch (keyword.length()) {
case 3:
if (keyword.compare(gOne, 3) == 0) {
return ONE;
} else if (keyword.compare(gTwo, 3) == 0) {
return TWO;
} else if (keyword.compare(gFew, 3) == 0) {
return FEW;
}
break;
case 4:
if (keyword.compare(gMany, 4) == 0) {
return MANY;
} else if (keyword.compare(gZero, 4) == 0) {
return ZERO;
}
break;
case 5:
if (keyword.compare(gOther, 5) == 0) {
return OTHER;
}
break;
default:
break;
}
return -1;
}
int32_t StandardPlural::indexFromString(const char *keyword, UErrorCode &errorCode) {
if (U_FAILURE(errorCode)) { return OTHER; }
int32_t i = indexOrNegativeFromString(keyword);

45
icu4c/source/i18n/standardplural.h
View File

@ -18,6 +18,8 @@
U_NAMESPACE_BEGIN
class UnicodeString;
/**
* Standard CLDR plural form/category constants.
* See http://www.unicode.org/reports/tr35/tr35-numbers.html#Language_Plural_Rules
@ -47,6 +49,14 @@ public:
return static_cast<Form>(indexOrOtherIndexFromString(keyword));
}
/**
* @param keyword for example "few" or "other"
* @return the plural form corresponding to the keyword, or OTHER
*/
static Form orOtherFromString(const UnicodeString &keyword) {
return static_cast<Form>(indexOrOtherIndexFromString(keyword));
}
/**
* Sets U_ILLEGAL_ARGUMENT_ERROR if the keyword is not a plural form.
*
@ -57,6 +67,16 @@ public:
return static_cast<Form>(indexFromString(keyword, errorCode));
}
/**
* Sets U_ILLEGAL_ARGUMENT_ERROR if the keyword is not a plural form.
*
* @param keyword for example "few" or "other"
* @return the plural form corresponding to the keyword
*/
static Form fromString(const UnicodeString &keyword, UErrorCode &errorCode) {
return static_cast<Form>(indexFromString(keyword, errorCode));
}
/**
* @param keyword for example "few" or "other"
* @return the index of the plural form corresponding to the keyword, or a negative value
@ -65,13 +85,28 @@ public:
/**
* @param keyword for example "few" or "other"
* @return the index of the plural form corresponding to the keyword, or OTHER_INDEX
* @return the index of the plural form corresponding to the keyword, or a negative value
*/
static int32_t indexOrNegativeFromString(const UnicodeString &keyword);
/**
* @param keyword for example "few" or "other"
* @return the index of the plural form corresponding to the keyword, or OTHER
*/
static int32_t indexOrOtherIndexFromString(const char *keyword) {
int32_t i = indexOrNegativeFromString(keyword);
return i >= 0 ? i : OTHER;
}
/**
* @param keyword for example "few" or "other"
* @return the index of the plural form corresponding to the keyword, or OTHER
*/
static int32_t indexOrOtherIndexFromString(const UnicodeString &keyword) {
int32_t i = indexOrNegativeFromString(keyword);
return i >= 0 ? i : OTHER;
}
/**
* Sets U_ILLEGAL_ARGUMENT_ERROR if the keyword is not a plural form.
*
@ -79,6 +114,14 @@ public:
* @return the index of the plural form corresponding to the keyword
*/
static int32_t indexFromString(const char *keyword, UErrorCode &errorCode);
/**
* Sets U_ILLEGAL_ARGUMENT_ERROR if the keyword is not a plural form.
*
* @param keyword for example "few" or "other"
* @return the index of the plural form corresponding to the keyword
*/
static int32_t indexFromString(const UnicodeString &keyword, UErrorCode &errorCode);
};
U_NAMESPACE_END