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