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node/deps/icu-small/source/i18n/ucol_sit.cpp

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// Copyright (C) 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2004-2016, International Business Machines
* Corporation and others. All Rights Reserved.
*******************************************************************************
* file name: ucol_sit.cpp
* encoding: US-ASCII
* tab size: 8 (not used)
* indentation:4
*
* Modification history
* Date Name Comments
* 03/12/2004 weiv Creation
*/
#include "unicode/ustring.h"
#include "unicode/udata.h"
#include "unicode/utf16.h"
#include "utracimp.h"
#include "ucol_imp.h"
#include "cmemory.h"
#include "cstring.h"
#include "uresimp.h"
#include "unicode/coll.h"
#ifdef UCOL_TRACE_SIT
# include <stdio.h>
#endif
#if !UCONFIG_NO_COLLATION
#include "unicode/tblcoll.h"
enum OptionsList {
UCOL_SIT_LANGUAGE = 0,
UCOL_SIT_SCRIPT = 1,
UCOL_SIT_REGION = 2,
UCOL_SIT_VARIANT = 3,
UCOL_SIT_KEYWORD = 4,
UCOL_SIT_PROVIDER = 5,
UCOL_SIT_LOCELEMENT_MAX = UCOL_SIT_PROVIDER, /* the last element that's part of LocElements */
UCOL_SIT_BCP47,
UCOL_SIT_STRENGTH,
UCOL_SIT_CASE_LEVEL,
UCOL_SIT_CASE_FIRST,
UCOL_SIT_NUMERIC_COLLATION,
UCOL_SIT_ALTERNATE_HANDLING,
UCOL_SIT_NORMALIZATION_MODE,
UCOL_SIT_FRENCH_COLLATION,
UCOL_SIT_HIRAGANA_QUATERNARY,
UCOL_SIT_VARIABLE_TOP,
UCOL_SIT_VARIABLE_TOP_VALUE,
UCOL_SIT_ITEMS_COUNT
};
/* option starters chars. */
static const char alternateHArg = 'A';
static const char variableTopValArg = 'B';
static const char caseFirstArg = 'C';
static const char numericCollArg = 'D';
static const char caseLevelArg = 'E';
static const char frenchCollArg = 'F';
static const char hiraganaQArg = 'H';
static const char keywordArg = 'K';
static const char languageArg = 'L';
static const char normArg = 'N';
static const char providerArg = 'P';
static const char regionArg = 'R';
static const char strengthArg = 'S';
static const char variableTopArg = 'T';
static const char variantArg = 'V';
static const char RFC3066Arg = 'X';
static const char scriptArg = 'Z';
static const char collationKeyword[] = "@collation=";
static const char providerKeyword[] = "@sp=";
static const int32_t locElementCount = UCOL_SIT_LOCELEMENT_MAX+1;
static const int32_t locElementCapacity = 32;
static const int32_t loc3066Capacity = 256;
static const int32_t locProviderCapacity = 10;
static const int32_t internalBufferSize = 512;
/* structure containing specification of a collator. Initialized
* from a short string. Also used to construct a short string from a
* collator instance
*/
struct CollatorSpec {
char locElements[locElementCount][locElementCapacity];
char locale[loc3066Capacity];
char provider[locProviderCapacity];
UColAttributeValue options[UCOL_ATTRIBUTE_COUNT];
uint32_t variableTopValue;
UChar variableTopString[locElementCapacity];
int32_t variableTopStringLen;
UBool variableTopSet;
struct {
const char *start;
int32_t len;
} entries[UCOL_SIT_ITEMS_COUNT];
};
/* structure for converting between character attribute
* representation and real collation attribute value.
*/
struct AttributeConversion {
char letter;
UColAttributeValue value;
};
static const AttributeConversion conversions[12] = {
{ '1', UCOL_PRIMARY },
{ '2', UCOL_SECONDARY },
{ '3', UCOL_TERTIARY },
{ '4', UCOL_QUATERNARY },
{ 'D', UCOL_DEFAULT },
{ 'I', UCOL_IDENTICAL },
{ 'L', UCOL_LOWER_FIRST },
{ 'N', UCOL_NON_IGNORABLE },
{ 'O', UCOL_ON },
{ 'S', UCOL_SHIFTED },
{ 'U', UCOL_UPPER_FIRST },
{ 'X', UCOL_OFF }
};
static UColAttributeValue
ucol_sit_letterToAttributeValue(char letter, UErrorCode *status) {
uint32_t i = 0;
for(i = 0; i < UPRV_LENGTHOF(conversions); i++) {
if(conversions[i].letter == letter) {
return conversions[i].value;
}
}
*status = U_ILLEGAL_ARGUMENT_ERROR;
#ifdef UCOL_TRACE_SIT
fprintf(stderr, "%s:%d: unknown letter %c: %s\n", __FILE__, __LINE__, letter, u_errorName(*status));
#endif
return UCOL_DEFAULT;
}
/* function prototype for functions used to parse a short string */
U_CDECL_BEGIN
typedef const char* U_CALLCONV
ActionFunction(CollatorSpec *spec, uint32_t value1, const char* string,
UErrorCode *status);
U_CDECL_END
U_CDECL_BEGIN
static const char* U_CALLCONV
_processLocaleElement(CollatorSpec *spec, uint32_t value, const char* string,
UErrorCode *status)
{
int32_t len = 0;
do {
if(value == UCOL_SIT_LANGUAGE || value == UCOL_SIT_KEYWORD || value == UCOL_SIT_PROVIDER) {
spec->locElements[value][len++] = uprv_tolower(*string);
} else {
spec->locElements[value][len++] = *string;
}
} while(*(++string) != '_' && *string && len < locElementCapacity);
if(len >= locElementCapacity) {
*status = U_BUFFER_OVERFLOW_ERROR;
return string;
}
// don't skip the underscore at the end
return string;
}
U_CDECL_END
U_CDECL_BEGIN
static const char* U_CALLCONV
_processRFC3066Locale(CollatorSpec *spec, uint32_t, const char* string,
UErrorCode *status)
{
char terminator = *string;
string++;
const char *end = uprv_strchr(string+1, terminator);
if(end == NULL || end - string >= loc3066Capacity) {
*status = U_BUFFER_OVERFLOW_ERROR;
return string;
} else {
uprv_strncpy(spec->locale, string, end-string);
return end+1;
}
}
U_CDECL_END
U_CDECL_BEGIN
static const char* U_CALLCONV
_processCollatorOption(CollatorSpec *spec, uint32_t option, const char* string,
UErrorCode *status)
{
spec->options[option] = ucol_sit_letterToAttributeValue(*string, status);
if((*(++string) != '_' && *string) || U_FAILURE(*status)) {
#ifdef UCOL_TRACE_SIT
fprintf(stderr, "%s:%d: unknown collator option at '%s': %s\n", __FILE__, __LINE__, string, u_errorName(*status));
#endif
*status = U_ILLEGAL_ARGUMENT_ERROR;
}
return string;
}
U_CDECL_END
static UChar
readHexCodeUnit(const char **string, UErrorCode *status)
{
UChar result = 0;
int32_t value = 0;
char c;
int32_t noDigits = 0;
while((c = **string) != 0 && noDigits < 4) {
if( c >= '0' && c <= '9') {
value = c - '0';
} else if ( c >= 'a' && c <= 'f') {
value = c - 'a' + 10;
} else if ( c >= 'A' && c <= 'F') {
value = c - 'A' + 10;
} else {
*status = U_ILLEGAL_ARGUMENT_ERROR;
#ifdef UCOL_TRACE_SIT
fprintf(stderr, "%s:%d: Bad hex char at '%s': %s\n", __FILE__, __LINE__, *string, u_errorName(*status));
#endif
return 0;
}
result = (result << 4) | (UChar)value;
noDigits++;
(*string)++;
}
// if the string was terminated before we read 4 digits, set an error
if(noDigits < 4) {
*status = U_ILLEGAL_ARGUMENT_ERROR;
#ifdef UCOL_TRACE_SIT
fprintf(stderr, "%s:%d: Short (only %d digits, wanted 4) at '%s': %s\n", __FILE__, __LINE__, noDigits,*string, u_errorName(*status));
#endif
}
return result;
}
U_CDECL_BEGIN
static const char* U_CALLCONV
_processVariableTop(CollatorSpec *spec, uint32_t value1, const char* string, UErrorCode *status)
{
// get four digits
int32_t i = 0;
if(!value1) {
while(U_SUCCESS(*status) && i < locElementCapacity && *string != 0 && *string != '_') {
spec->variableTopString[i++] = readHexCodeUnit(&string, status);
}
spec->variableTopStringLen = i;
if(i == locElementCapacity && *string != 0 && *string != '_') {
*status = U_BUFFER_OVERFLOW_ERROR;
}
} else {
spec->variableTopValue = readHexCodeUnit(&string, status);
}
if(U_SUCCESS(*status)) {
spec->variableTopSet = TRUE;
}
return string;
}
U_CDECL_END
/* Table for parsing short strings */
struct ShortStringOptions {
char optionStart;
ActionFunction *action;
uint32_t attr;
};
static const ShortStringOptions options[UCOL_SIT_ITEMS_COUNT] =
{
/* 10 ALTERNATE_HANDLING */ {alternateHArg, _processCollatorOption, UCOL_ALTERNATE_HANDLING }, // alternate N, S, D
/* 15 VARIABLE_TOP_VALUE */ {variableTopValArg, _processVariableTop, 1 },
/* 08 CASE_FIRST */ {caseFirstArg, _processCollatorOption, UCOL_CASE_FIRST }, // case first L, U, X, D
/* 09 NUMERIC_COLLATION */ {numericCollArg, _processCollatorOption, UCOL_NUMERIC_COLLATION }, // codan O, X, D
/* 07 CASE_LEVEL */ {caseLevelArg, _processCollatorOption, UCOL_CASE_LEVEL }, // case level O, X, D
/* 12 FRENCH_COLLATION */ {frenchCollArg, _processCollatorOption, UCOL_FRENCH_COLLATION }, // french O, X, D
/* 13 HIRAGANA_QUATERNARY] */ {hiraganaQArg, _processCollatorOption, UCOL_HIRAGANA_QUATERNARY_MODE }, // hiragana O, X, D
/* 04 KEYWORD */ {keywordArg, _processLocaleElement, UCOL_SIT_KEYWORD }, // keyword
/* 00 LANGUAGE */ {languageArg, _processLocaleElement, UCOL_SIT_LANGUAGE }, // language
/* 11 NORMALIZATION_MODE */ {normArg, _processCollatorOption, UCOL_NORMALIZATION_MODE }, // norm O, X, D
/* 02 REGION */ {regionArg, _processLocaleElement, UCOL_SIT_REGION }, // region
/* 06 STRENGTH */ {strengthArg, _processCollatorOption, UCOL_STRENGTH }, // strength 1, 2, 3, 4, I, D
/* 14 VARIABLE_TOP */ {variableTopArg, _processVariableTop, 0 },
/* 03 VARIANT */ {variantArg, _processLocaleElement, UCOL_SIT_VARIANT }, // variant
/* 05 RFC3066BIS */ {RFC3066Arg, _processRFC3066Locale, 0 }, // rfc3066bis locale name
/* 01 SCRIPT */ {scriptArg, _processLocaleElement, UCOL_SIT_SCRIPT }, // script
/* PROVIDER */ {providerArg, _processLocaleElement, UCOL_SIT_PROVIDER }
};
static
const char* ucol_sit_readOption(const char *start, CollatorSpec *spec,
UErrorCode *status)
{
int32_t i = 0;
for(i = 0; i < UCOL_SIT_ITEMS_COUNT; i++) {
if(*start == options[i].optionStart) {
spec->entries[i].start = start;
const char* end = options[i].action(spec, options[i].attr, start+1, status);
spec->entries[i].len = (int32_t)(end - start);
return end;
}
}
*status = U_ILLEGAL_ARGUMENT_ERROR;
#ifdef UCOL_TRACE_SIT
fprintf(stderr, "%s:%d: Unknown option at '%s': %s\n", __FILE__, __LINE__, start, u_errorName(*status));
#endif
return start;
}
static
void ucol_sit_initCollatorSpecs(CollatorSpec *spec)
{
// reset everything
uprv_memset(spec, 0, sizeof(CollatorSpec));
// set collation options to default
int32_t i = 0;
for(i = 0; i < UCOL_ATTRIBUTE_COUNT; i++) {
spec->options[i] = UCOL_DEFAULT;
}
}
static const char*
ucol_sit_readSpecs(CollatorSpec *s, const char *string,
UParseError *parseError, UErrorCode *status)
{
const char *definition = string;
while(U_SUCCESS(*status) && *string) {
string = ucol_sit_readOption(string, s, status);
// advance over '_'
while(*string && *string == '_') {
string++;
}
}
if(U_FAILURE(*status)) {
parseError->offset = (int32_t)(string - definition);
}
return string;
}
static
int32_t ucol_sit_dumpSpecs(CollatorSpec *s, char *destination, int32_t capacity, UErrorCode *status)
{
int32_t i = 0, j = 0;
int32_t len = 0;
char optName;
if(U_SUCCESS(*status)) {
for(i = 0; i < UCOL_SIT_ITEMS_COUNT; i++) {
if(s->entries[i].start) {
if(len) {
if(len < capacity) {
uprv_strcat(destination, "_");
}
len++;
}
optName = *(s->entries[i].start);
if(optName == languageArg || optName == regionArg || optName == variantArg || optName == keywordArg) {
for(j = 0; j < s->entries[i].len; j++) {
if(len + j < capacity) {
destination[len+j] = uprv_toupper(*(s->entries[i].start+j));
}
}
len += s->entries[i].len;
} else {
len += s->entries[i].len;
if(len < capacity) {
uprv_strncat(destination,s->entries[i].start, s->entries[i].len);
}
}
}
}
return len;
} else {
return 0;
}
}
static void
ucol_sit_calculateWholeLocale(CollatorSpec *s) {
// put the locale together, unless we have a done
// locale
if(s->locale[0] == 0) {
// first the language
uprv_strcat(s->locale, s->locElements[UCOL_SIT_LANGUAGE]);
// then the script, if present
if(*(s->locElements[UCOL_SIT_SCRIPT])) {
uprv_strcat(s->locale, "_");
uprv_strcat(s->locale, s->locElements[UCOL_SIT_SCRIPT]);
}
// then the region, if present
if(*(s->locElements[UCOL_SIT_REGION])) {
uprv_strcat(s->locale, "_");
uprv_strcat(s->locale, s->locElements[UCOL_SIT_REGION]);
} else if(*(s->locElements[UCOL_SIT_VARIANT])) { // if there is a variant, we need an underscore
uprv_strcat(s->locale, "_");
}
// add variant, if there
if(*(s->locElements[UCOL_SIT_VARIANT])) {
uprv_strcat(s->locale, "_");
uprv_strcat(s->locale, s->locElements[UCOL_SIT_VARIANT]);
}
// if there is a collation keyword, add that too
if(*(s->locElements[UCOL_SIT_KEYWORD])) {
uprv_strcat(s->locale, collationKeyword);
uprv_strcat(s->locale, s->locElements[UCOL_SIT_KEYWORD]);
}
// if there is a provider keyword, add that too
if(*(s->locElements[UCOL_SIT_PROVIDER])) {
uprv_strcat(s->locale, providerKeyword);
uprv_strcat(s->locale, s->locElements[UCOL_SIT_PROVIDER]);
}
}
}
U_CAPI void U_EXPORT2
ucol_prepareShortStringOpen( const char *definition,
UBool,
UParseError *parseError,
UErrorCode *status)
{
if(U_FAILURE(*status)) return;
UParseError internalParseError;
if(!parseError) {
parseError = &internalParseError;
}
parseError->line = 0;
parseError->offset = 0;
parseError->preContext[0] = 0;
parseError->postContext[0] = 0;
// first we want to pick stuff out of short string.
// we'll end up with an UCA version, locale and a bunch of
// settings
// analyse the string in order to get everything we need.
CollatorSpec s;
ucol_sit_initCollatorSpecs(&s);
ucol_sit_readSpecs(&s, definition, parseError, status);
ucol_sit_calculateWholeLocale(&s);
char buffer[internalBufferSize];
uprv_memset(buffer, 0, internalBufferSize);
uloc_canonicalize(s.locale, buffer, internalBufferSize, status);
UResourceBundle *b = ures_open(U_ICUDATA_COLL, buffer, status);
/* we try to find stuff from keyword */
UResourceBundle *collations = ures_getByKey(b, "collations", NULL, status);
UResourceBundle *collElem = NULL;
char keyBuffer[256];
// if there is a keyword, we pick it up and try to get elements
if(!uloc_getKeywordValue(buffer, "collation", keyBuffer, 256, status)) {
// no keyword. we try to find the default setting, which will give us the keyword value
UResourceBundle *defaultColl = ures_getByKeyWithFallback(collations, "default", NULL, status);
if(U_SUCCESS(*status)) {
int32_t defaultKeyLen = 0;
const UChar *defaultKey = ures_getString(defaultColl, &defaultKeyLen, status);
u_UCharsToChars(defaultKey, keyBuffer, defaultKeyLen);
keyBuffer[defaultKeyLen] = 0;
} else {
*status = U_INTERNAL_PROGRAM_ERROR;
return;
}
ures_close(defaultColl);
}
collElem = ures_getByKeyWithFallback(collations, keyBuffer, collElem, status);
ures_close(collElem);
ures_close(collations);
ures_close(b);
}
U_CAPI UCollator* U_EXPORT2
ucol_openFromShortString( const char *definition,
UBool forceDefaults,
UParseError *parseError,
UErrorCode *status)
{
UTRACE_ENTRY_OC(UTRACE_UCOL_OPEN_FROM_SHORT_STRING);
UTRACE_DATA1(UTRACE_INFO, "short string = \"%s\"", definition);
if(U_FAILURE(*status)) return 0;
UParseError internalParseError;
if(!parseError) {
parseError = &internalParseError;
}
parseError->line = 0;
parseError->offset = 0;
parseError->preContext[0] = 0;
parseError->postContext[0] = 0;
// first we want to pick stuff out of short string.
// we'll end up with an UCA version, locale and a bunch of
// settings
// analyse the string in order to get everything we need.
const char *string = definition;
CollatorSpec s;
ucol_sit_initCollatorSpecs(&s);
string = ucol_sit_readSpecs(&s, definition, parseError, status);
ucol_sit_calculateWholeLocale(&s);
char buffer[internalBufferSize];
uprv_memset(buffer, 0, internalBufferSize);
uloc_canonicalize(s.locale, buffer, internalBufferSize, status);
UCollator *result = ucol_open(buffer, status);
int32_t i = 0;
for(i = 0; i < UCOL_ATTRIBUTE_COUNT; i++) {
if(s.options[i] != UCOL_DEFAULT) {
if(forceDefaults || ucol_getAttribute(result, (UColAttribute)i, status) != s.options[i]) {
ucol_setAttribute(result, (UColAttribute)i, s.options[i], status);
}
if(U_FAILURE(*status)) {
parseError->offset = (int32_t)(string - definition);
ucol_close(result);
return NULL;
}
}
}
if(s.variableTopSet) {
if(s.variableTopString[0]) {
ucol_setVariableTop(result, s.variableTopString, s.variableTopStringLen, status);
} else { // we set by value, using 'B'
ucol_restoreVariableTop(result, s.variableTopValue, status);
}
}
if(U_FAILURE(*status)) { // here it can only be a bogus value
ucol_close(result);
result = NULL;
}
UTRACE_EXIT_PTR_STATUS(result, *status);
return result;
}
U_CAPI int32_t U_EXPORT2
ucol_getShortDefinitionString(const UCollator *coll,
const char *locale,
char *dst,
int32_t capacity,
UErrorCode *status)
{
if(U_FAILURE(*status)) return 0;
if(coll == NULL) {
*status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
return ((icu::Collator*)coll)->internalGetShortDefinitionString(locale,dst,capacity,*status);
}
U_CAPI int32_t U_EXPORT2
ucol_normalizeShortDefinitionString(const char *definition,
char *destination,
int32_t capacity,
UParseError *parseError,
UErrorCode *status)
{
if(U_FAILURE(*status)) {
return 0;
}
if(destination) {
uprv_memset(destination, 0, capacity*sizeof(char));
}
UParseError pe;
if(!parseError) {
parseError = &pe;
}
// validate
CollatorSpec s;
ucol_sit_initCollatorSpecs(&s);
ucol_sit_readSpecs(&s, definition, parseError, status);
return ucol_sit_dumpSpecs(&s, destination, capacity, status);
}
/**
* Get a set containing the contractions defined by the collator. The set includes
* both the UCA contractions and the contractions defined by the collator
* @param coll collator
* @param conts the set to hold the result
* @param status to hold the error code
* @return the size of the contraction set
*/
U_CAPI int32_t U_EXPORT2
ucol_getContractions( const UCollator *coll,
USet *contractions,
UErrorCode *status)
{
ucol_getContractionsAndExpansions(coll, contractions, NULL, FALSE, status);
return uset_getItemCount(contractions);
}
/**
* Get a set containing the expansions defined by the collator. The set includes
* both the UCA expansions and the expansions defined by the tailoring
* @param coll collator
* @param conts the set to hold the result
* @param addPrefixes add the prefix contextual elements to contractions
* @param status to hold the error code
*
* @draft ICU 3.4
*/
U_CAPI void U_EXPORT2
ucol_getContractionsAndExpansions( const UCollator *coll,
USet *contractions,
USet *expansions,
UBool addPrefixes,
UErrorCode *status)
{
if(U_FAILURE(*status)) {
return;
}
if(coll == NULL) {
*status = U_ILLEGAL_ARGUMENT_ERROR;
return;
}
const icu::RuleBasedCollator *rbc = icu::RuleBasedCollator::rbcFromUCollator(coll);
if(rbc == NULL) {
*status = U_UNSUPPORTED_ERROR;
return;
}
rbc->internalGetContractionsAndExpansions(
icu::UnicodeSet::fromUSet(contractions),
icu::UnicodeSet::fromUSet(expansions),
addPrefixes, *status);
}
#endif