1301 lines
43 KiB
C++
1301 lines
43 KiB
C++
/*
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*******************************************************************************
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*
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* Copyright (C) 1999-2014, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: uniset_props.cpp
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2004aug25
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* created by: Markus W. Scherer
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*
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* Character property dependent functions moved here from uniset.cpp
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*/
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#include "unicode/utypes.h"
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#include "unicode/uniset.h"
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#include "unicode/parsepos.h"
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#include "unicode/uchar.h"
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#include "unicode/uscript.h"
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#include "unicode/symtable.h"
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#include "unicode/uset.h"
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#include "unicode/locid.h"
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#include "unicode/brkiter.h"
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#include "uset_imp.h"
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#include "ruleiter.h"
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#include "cmemory.h"
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#include "ucln_cmn.h"
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#include "util.h"
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#include "uvector.h"
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#include "uprops.h"
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#include "propname.h"
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#include "normalizer2impl.h"
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#include "ucase.h"
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#include "ubidi_props.h"
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#include "uinvchar.h"
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#include "uprops.h"
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#include "charstr.h"
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#include "cstring.h"
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#include "mutex.h"
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#include "umutex.h"
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#include "uassert.h"
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#include "hash.h"
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U_NAMESPACE_USE
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// initial storage. Must be >= 0
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// *** same as in uniset.cpp ! ***
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#define START_EXTRA 16
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// Define UChar constants using hex for EBCDIC compatibility
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// Used #define to reduce private static exports and memory access time.
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#define SET_OPEN ((UChar)0x005B) /*[*/
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#define SET_CLOSE ((UChar)0x005D) /*]*/
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#define HYPHEN ((UChar)0x002D) /*-*/
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#define COMPLEMENT ((UChar)0x005E) /*^*/
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#define COLON ((UChar)0x003A) /*:*/
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#define BACKSLASH ((UChar)0x005C) /*\*/
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#define INTERSECTION ((UChar)0x0026) /*&*/
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#define UPPER_U ((UChar)0x0055) /*U*/
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#define LOWER_U ((UChar)0x0075) /*u*/
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#define OPEN_BRACE ((UChar)123) /*{*/
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#define CLOSE_BRACE ((UChar)125) /*}*/
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#define UPPER_P ((UChar)0x0050) /*P*/
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#define LOWER_P ((UChar)0x0070) /*p*/
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#define UPPER_N ((UChar)78) /*N*/
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#define EQUALS ((UChar)0x003D) /*=*/
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//static const UChar POSIX_OPEN[] = { SET_OPEN,COLON,0 }; // "[:"
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static const UChar POSIX_CLOSE[] = { COLON,SET_CLOSE,0 }; // ":]"
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//static const UChar PERL_OPEN[] = { BACKSLASH,LOWER_P,0 }; // "\\p"
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//static const UChar PERL_CLOSE[] = { CLOSE_BRACE,0 }; // "}"
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//static const UChar NAME_OPEN[] = { BACKSLASH,UPPER_N,0 }; // "\\N"
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static const UChar HYPHEN_RIGHT_BRACE[] = {HYPHEN,SET_CLOSE,0}; /*-]*/
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// Special property set IDs
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static const char ANY[] = "ANY"; // [\u0000-\U0010FFFF]
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static const char ASCII[] = "ASCII"; // [\u0000-\u007F]
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static const char ASSIGNED[] = "Assigned"; // [:^Cn:]
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// Unicode name property alias
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#define NAME_PROP "na"
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#define NAME_PROP_LENGTH 2
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/**
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* Delimiter string used in patterns to close a category reference:
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* ":]". Example: "[:Lu:]".
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*/
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//static const UChar CATEGORY_CLOSE[] = {COLON, SET_CLOSE, 0x0000}; /* ":]" */
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// Cached sets ------------------------------------------------------------- ***
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U_CDECL_BEGIN
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static UBool U_CALLCONV uset_cleanup();
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struct Inclusion {
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UnicodeSet *fSet;
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UInitOnce fInitOnce;
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};
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static Inclusion gInclusions[UPROPS_SRC_COUNT]; // cached getInclusions()
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static UnicodeSet *uni32Singleton;
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static icu::UInitOnce uni32InitOnce = U_INITONCE_INITIALIZER;
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//----------------------------------------------------------------
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// Inclusions list
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//----------------------------------------------------------------
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// USetAdder implementation
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// Does not use uset.h to reduce code dependencies
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static void U_CALLCONV
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_set_add(USet *set, UChar32 c) {
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((UnicodeSet *)set)->add(c);
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}
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static void U_CALLCONV
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_set_addRange(USet *set, UChar32 start, UChar32 end) {
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((UnicodeSet *)set)->add(start, end);
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}
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static void U_CALLCONV
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_set_addString(USet *set, const UChar *str, int32_t length) {
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((UnicodeSet *)set)->add(UnicodeString((UBool)(length<0), str, length));
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}
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/**
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* Cleanup function for UnicodeSet
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*/
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static UBool U_CALLCONV uset_cleanup(void) {
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for(int32_t i = UPROPS_SRC_NONE; i < UPROPS_SRC_COUNT; ++i) {
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Inclusion &in = gInclusions[i];
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delete in.fSet;
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in.fSet = NULL;
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in.fInitOnce.reset();
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}
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delete uni32Singleton;
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uni32Singleton = NULL;
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uni32InitOnce.reset();
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return TRUE;
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}
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U_CDECL_END
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U_NAMESPACE_BEGIN
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/*
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Reduce excessive reallocation, and make it easier to detect initialization problems.
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Usually you don't see smaller sets than this for Unicode 5.0.
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*/
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#define DEFAULT_INCLUSION_CAPACITY 3072
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void U_CALLCONV UnicodeSet_initInclusion(int32_t src, UErrorCode &status) {
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// This function is invoked only via umtx_initOnce().
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// This function is a friend of class UnicodeSet.
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U_ASSERT(src >=0 && src<UPROPS_SRC_COUNT);
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UnicodeSet * &incl = gInclusions[src].fSet;
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U_ASSERT(incl == NULL);
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incl = new UnicodeSet();
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if (incl == NULL) {
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status = U_MEMORY_ALLOCATION_ERROR;
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return;
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}
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USetAdder sa = {
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(USet *)incl,
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_set_add,
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_set_addRange,
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_set_addString,
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NULL, // don't need remove()
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NULL // don't need removeRange()
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};
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incl->ensureCapacity(DEFAULT_INCLUSION_CAPACITY, status);
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switch(src) {
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case UPROPS_SRC_CHAR:
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uchar_addPropertyStarts(&sa, &status);
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break;
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case UPROPS_SRC_PROPSVEC:
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upropsvec_addPropertyStarts(&sa, &status);
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break;
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case UPROPS_SRC_CHAR_AND_PROPSVEC:
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uchar_addPropertyStarts(&sa, &status);
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upropsvec_addPropertyStarts(&sa, &status);
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break;
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#if !UCONFIG_NO_NORMALIZATION
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case UPROPS_SRC_CASE_AND_NORM: {
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const Normalizer2Impl *impl=Normalizer2Factory::getNFCImpl(status);
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if(U_SUCCESS(status)) {
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impl->addPropertyStarts(&sa, status);
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}
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ucase_addPropertyStarts(ucase_getSingleton(), &sa, &status);
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break;
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}
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case UPROPS_SRC_NFC: {
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const Normalizer2Impl *impl=Normalizer2Factory::getNFCImpl(status);
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if(U_SUCCESS(status)) {
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impl->addPropertyStarts(&sa, status);
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}
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break;
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}
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case UPROPS_SRC_NFKC: {
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const Normalizer2Impl *impl=Normalizer2Factory::getNFKCImpl(status);
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if(U_SUCCESS(status)) {
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impl->addPropertyStarts(&sa, status);
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}
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break;
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}
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case UPROPS_SRC_NFKC_CF: {
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const Normalizer2Impl *impl=Normalizer2Factory::getNFKC_CFImpl(status);
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if(U_SUCCESS(status)) {
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impl->addPropertyStarts(&sa, status);
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}
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break;
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}
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case UPROPS_SRC_NFC_CANON_ITER: {
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const Normalizer2Impl *impl=Normalizer2Factory::getNFCImpl(status);
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if(U_SUCCESS(status)) {
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impl->addCanonIterPropertyStarts(&sa, status);
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}
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break;
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}
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#endif
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case UPROPS_SRC_CASE:
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ucase_addPropertyStarts(ucase_getSingleton(), &sa, &status);
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break;
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case UPROPS_SRC_BIDI:
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ubidi_addPropertyStarts(ubidi_getSingleton(), &sa, &status);
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break;
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default:
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status = U_INTERNAL_PROGRAM_ERROR;
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break;
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}
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if (U_FAILURE(status)) {
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delete incl;
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incl = NULL;
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return;
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}
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// Compact for caching
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incl->compact();
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ucln_common_registerCleanup(UCLN_COMMON_USET, uset_cleanup);
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}
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const UnicodeSet* UnicodeSet::getInclusions(int32_t src, UErrorCode &status) {
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U_ASSERT(src >=0 && src<UPROPS_SRC_COUNT);
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Inclusion &i = gInclusions[src];
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umtx_initOnce(i.fInitOnce, &UnicodeSet_initInclusion, src, status);
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return i.fSet;
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}
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// Cache some sets for other services -------------------------------------- ***
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void U_CALLCONV createUni32Set(UErrorCode &errorCode) {
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U_ASSERT(uni32Singleton == NULL);
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uni32Singleton = new UnicodeSet(UNICODE_STRING_SIMPLE("[:age=3.2:]"), errorCode);
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if(uni32Singleton==NULL) {
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errorCode=U_MEMORY_ALLOCATION_ERROR;
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} else {
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uni32Singleton->freeze();
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}
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ucln_common_registerCleanup(UCLN_COMMON_USET, uset_cleanup);
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}
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U_CFUNC UnicodeSet *
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uniset_getUnicode32Instance(UErrorCode &errorCode) {
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umtx_initOnce(uni32InitOnce, &createUni32Set, errorCode);
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return uni32Singleton;
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}
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// helper functions for matching of pattern syntax pieces ------------------ ***
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// these functions are parallel to the PERL_OPEN etc. strings above
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// using these functions is not only faster than UnicodeString::compare() and
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// caseCompare(), but they also make UnicodeSet work for simple patterns when
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// no Unicode properties data is available - when caseCompare() fails
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static inline UBool
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isPerlOpen(const UnicodeString &pattern, int32_t pos) {
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UChar c;
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return pattern.charAt(pos)==BACKSLASH && ((c=pattern.charAt(pos+1))==LOWER_P || c==UPPER_P);
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}
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/*static inline UBool
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isPerlClose(const UnicodeString &pattern, int32_t pos) {
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return pattern.charAt(pos)==CLOSE_BRACE;
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}*/
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static inline UBool
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isNameOpen(const UnicodeString &pattern, int32_t pos) {
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return pattern.charAt(pos)==BACKSLASH && pattern.charAt(pos+1)==UPPER_N;
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}
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static inline UBool
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isPOSIXOpen(const UnicodeString &pattern, int32_t pos) {
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return pattern.charAt(pos)==SET_OPEN && pattern.charAt(pos+1)==COLON;
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}
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/*static inline UBool
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isPOSIXClose(const UnicodeString &pattern, int32_t pos) {
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return pattern.charAt(pos)==COLON && pattern.charAt(pos+1)==SET_CLOSE;
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}*/
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// TODO memory debugging provided inside uniset.cpp
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// could be made available here but probably obsolete with use of modern
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// memory leak checker tools
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#define _dbgct(me)
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//----------------------------------------------------------------
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// Constructors &c
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//----------------------------------------------------------------
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/**
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* Constructs a set from the given pattern, optionally ignoring
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* white space. See the class description for the syntax of the
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* pattern language.
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* @param pattern a string specifying what characters are in the set
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*/
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UnicodeSet::UnicodeSet(const UnicodeString& pattern,
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UErrorCode& status) :
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len(0), capacity(START_EXTRA), list(0), bmpSet(0), buffer(0),
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bufferCapacity(0), patLen(0), pat(NULL), strings(NULL), stringSpan(NULL),
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fFlags(0)
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{
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if(U_SUCCESS(status)){
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list = (UChar32*) uprv_malloc(sizeof(UChar32) * capacity);
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/* test for NULL */
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if(list == NULL) {
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status = U_MEMORY_ALLOCATION_ERROR;
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}else{
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allocateStrings(status);
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applyPattern(pattern, status);
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}
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}
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_dbgct(this);
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}
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//----------------------------------------------------------------
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// Public API
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//----------------------------------------------------------------
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UnicodeSet& UnicodeSet::applyPattern(const UnicodeString& pattern,
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UErrorCode& status) {
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// Equivalent to
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// return applyPattern(pattern, USET_IGNORE_SPACE, NULL, status);
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// but without dependency on closeOver().
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ParsePosition pos(0);
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applyPatternIgnoreSpace(pattern, pos, NULL, status);
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if (U_FAILURE(status)) return *this;
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int32_t i = pos.getIndex();
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// Skip over trailing whitespace
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ICU_Utility::skipWhitespace(pattern, i, TRUE);
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if (i != pattern.length()) {
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status = U_ILLEGAL_ARGUMENT_ERROR;
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}
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return *this;
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}
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void
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UnicodeSet::applyPatternIgnoreSpace(const UnicodeString& pattern,
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ParsePosition& pos,
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const SymbolTable* symbols,
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UErrorCode& status) {
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if (U_FAILURE(status)) {
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return;
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}
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if (isFrozen()) {
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status = U_NO_WRITE_PERMISSION;
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return;
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}
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// Need to build the pattern in a temporary string because
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// _applyPattern calls add() etc., which set pat to empty.
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UnicodeString rebuiltPat;
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RuleCharacterIterator chars(pattern, symbols, pos);
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applyPattern(chars, symbols, rebuiltPat, USET_IGNORE_SPACE, NULL, status);
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if (U_FAILURE(status)) return;
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if (chars.inVariable()) {
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// syntaxError(chars, "Extra chars in variable value");
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status = U_MALFORMED_SET;
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return;
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}
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setPattern(rebuiltPat);
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}
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/**
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* Return true if the given position, in the given pattern, appears
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* to be the start of a UnicodeSet pattern.
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*/
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UBool UnicodeSet::resemblesPattern(const UnicodeString& pattern, int32_t pos) {
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return ((pos+1) < pattern.length() &&
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pattern.charAt(pos) == (UChar)91/*[*/) ||
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resemblesPropertyPattern(pattern, pos);
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}
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//----------------------------------------------------------------
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// Implementation: Pattern parsing
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//----------------------------------------------------------------
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/**
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* A small all-inline class to manage a UnicodeSet pointer. Add
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* operator->() etc. as needed.
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*/
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class UnicodeSetPointer {
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UnicodeSet* p;
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public:
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inline UnicodeSetPointer() : p(0) {}
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inline ~UnicodeSetPointer() { delete p; }
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inline UnicodeSet* pointer() { return p; }
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inline UBool allocate() {
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if (p == 0) {
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p = new UnicodeSet();
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}
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return p != 0;
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}
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};
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/**
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* Parse the pattern from the given RuleCharacterIterator. The
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* iterator is advanced over the parsed pattern.
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* @param chars iterator over the pattern characters. Upon return
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* it will be advanced to the first character after the parsed
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* pattern, or the end of the iteration if all characters are
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* parsed.
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* @param symbols symbol table to use to parse and dereference
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* variables, or null if none.
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* @param rebuiltPat the pattern that was parsed, rebuilt or
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* copied from the input pattern, as appropriate.
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* @param options a bit mask of zero or more of the following:
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* IGNORE_SPACE, CASE.
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*/
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void UnicodeSet::applyPattern(RuleCharacterIterator& chars,
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const SymbolTable* symbols,
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UnicodeString& rebuiltPat,
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uint32_t options,
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UnicodeSet& (UnicodeSet::*caseClosure)(int32_t attribute),
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UErrorCode& ec) {
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if (U_FAILURE(ec)) return;
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// Syntax characters: [ ] ^ - & { }
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// Recognized special forms for chars, sets: c-c s-s s&s
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int32_t opts = RuleCharacterIterator::PARSE_VARIABLES |
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RuleCharacterIterator::PARSE_ESCAPES;
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if ((options & USET_IGNORE_SPACE) != 0) {
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opts |= RuleCharacterIterator::SKIP_WHITESPACE;
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}
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UnicodeString patLocal, buf;
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UBool usePat = FALSE;
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UnicodeSetPointer scratch;
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RuleCharacterIterator::Pos backup;
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// mode: 0=before [, 1=between [...], 2=after ]
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// lastItem: 0=none, 1=char, 2=set
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int8_t lastItem = 0, mode = 0;
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UChar32 lastChar = 0;
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UChar op = 0;
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UBool invert = FALSE;
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clear();
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while (mode != 2 && !chars.atEnd()) {
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U_ASSERT((lastItem == 0 && op == 0) ||
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(lastItem == 1 && (op == 0 || op == HYPHEN /*'-'*/)) ||
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(lastItem == 2 && (op == 0 || op == HYPHEN /*'-'*/ ||
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op == INTERSECTION /*'&'*/)));
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UChar32 c = 0;
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UBool literal = FALSE;
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UnicodeSet* nested = 0; // alias - do not delete
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// -------- Check for property pattern
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// setMode: 0=none, 1=unicodeset, 2=propertypat, 3=preparsed
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int8_t setMode = 0;
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if (resemblesPropertyPattern(chars, opts)) {
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setMode = 2;
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}
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// -------- Parse '[' of opening delimiter OR nested set.
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// If there is a nested set, use `setMode' to define how
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// the set should be parsed. If the '[' is part of the
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// opening delimiter for this pattern, parse special
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// strings "[", "[^", "[-", and "[^-". Check for stand-in
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// characters representing a nested set in the symbol
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// table.
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else {
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// Prepare to backup if necessary
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chars.getPos(backup);
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c = chars.next(opts, literal, ec);
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if (U_FAILURE(ec)) return;
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if (c == 0x5B /*'['*/ && !literal) {
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if (mode == 1) {
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chars.setPos(backup); // backup
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setMode = 1;
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} else {
|
|
// Handle opening '[' delimiter
|
|
mode = 1;
|
|
patLocal.append((UChar) 0x5B /*'['*/);
|
|
chars.getPos(backup); // prepare to backup
|
|
c = chars.next(opts, literal, ec);
|
|
if (U_FAILURE(ec)) return;
|
|
if (c == 0x5E /*'^'*/ && !literal) {
|
|
invert = TRUE;
|
|
patLocal.append((UChar) 0x5E /*'^'*/);
|
|
chars.getPos(backup); // prepare to backup
|
|
c = chars.next(opts, literal, ec);
|
|
if (U_FAILURE(ec)) return;
|
|
}
|
|
// Fall through to handle special leading '-';
|
|
// otherwise restart loop for nested [], \p{}, etc.
|
|
if (c == HYPHEN /*'-'*/) {
|
|
literal = TRUE;
|
|
// Fall through to handle literal '-' below
|
|
} else {
|
|
chars.setPos(backup); // backup
|
|
continue;
|
|
}
|
|
}
|
|
} else if (symbols != 0) {
|
|
const UnicodeFunctor *m = symbols->lookupMatcher(c);
|
|
if (m != 0) {
|
|
const UnicodeSet *ms = dynamic_cast<const UnicodeSet *>(m);
|
|
if (ms == NULL) {
|
|
ec = U_MALFORMED_SET;
|
|
return;
|
|
}
|
|
// casting away const, but `nested' won't be modified
|
|
// (important not to modify stored set)
|
|
nested = const_cast<UnicodeSet*>(ms);
|
|
setMode = 3;
|
|
}
|
|
}
|
|
}
|
|
|
|
// -------- Handle a nested set. This either is inline in
|
|
// the pattern or represented by a stand-in that has
|
|
// previously been parsed and was looked up in the symbol
|
|
// table.
|
|
|
|
if (setMode != 0) {
|
|
if (lastItem == 1) {
|
|
if (op != 0) {
|
|
// syntaxError(chars, "Char expected after operator");
|
|
ec = U_MALFORMED_SET;
|
|
return;
|
|
}
|
|
add(lastChar, lastChar);
|
|
_appendToPat(patLocal, lastChar, FALSE);
|
|
lastItem = 0;
|
|
op = 0;
|
|
}
|
|
|
|
if (op == HYPHEN /*'-'*/ || op == INTERSECTION /*'&'*/) {
|
|
patLocal.append(op);
|
|
}
|
|
|
|
if (nested == 0) {
|
|
// lazy allocation
|
|
if (!scratch.allocate()) {
|
|
ec = U_MEMORY_ALLOCATION_ERROR;
|
|
return;
|
|
}
|
|
nested = scratch.pointer();
|
|
}
|
|
switch (setMode) {
|
|
case 1:
|
|
nested->applyPattern(chars, symbols, patLocal, options, caseClosure, ec);
|
|
break;
|
|
case 2:
|
|
chars.skipIgnored(opts);
|
|
nested->applyPropertyPattern(chars, patLocal, ec);
|
|
if (U_FAILURE(ec)) return;
|
|
break;
|
|
case 3: // `nested' already parsed
|
|
nested->_toPattern(patLocal, FALSE);
|
|
break;
|
|
}
|
|
|
|
usePat = TRUE;
|
|
|
|
if (mode == 0) {
|
|
// Entire pattern is a category; leave parse loop
|
|
*this = *nested;
|
|
mode = 2;
|
|
break;
|
|
}
|
|
|
|
switch (op) {
|
|
case HYPHEN: /*'-'*/
|
|
removeAll(*nested);
|
|
break;
|
|
case INTERSECTION: /*'&'*/
|
|
retainAll(*nested);
|
|
break;
|
|
case 0:
|
|
addAll(*nested);
|
|
break;
|
|
}
|
|
|
|
op = 0;
|
|
lastItem = 2;
|
|
|
|
continue;
|
|
}
|
|
|
|
if (mode == 0) {
|
|
// syntaxError(chars, "Missing '['");
|
|
ec = U_MALFORMED_SET;
|
|
return;
|
|
}
|
|
|
|
// -------- Parse special (syntax) characters. If the
|
|
// current character is not special, or if it is escaped,
|
|
// then fall through and handle it below.
|
|
|
|
if (!literal) {
|
|
switch (c) {
|
|
case 0x5D /*']'*/:
|
|
if (lastItem == 1) {
|
|
add(lastChar, lastChar);
|
|
_appendToPat(patLocal, lastChar, FALSE);
|
|
}
|
|
// Treat final trailing '-' as a literal
|
|
if (op == HYPHEN /*'-'*/) {
|
|
add(op, op);
|
|
patLocal.append(op);
|
|
} else if (op == INTERSECTION /*'&'*/) {
|
|
// syntaxError(chars, "Trailing '&'");
|
|
ec = U_MALFORMED_SET;
|
|
return;
|
|
}
|
|
patLocal.append((UChar) 0x5D /*']'*/);
|
|
mode = 2;
|
|
continue;
|
|
case HYPHEN /*'-'*/:
|
|
if (op == 0) {
|
|
if (lastItem != 0) {
|
|
op = (UChar) c;
|
|
continue;
|
|
} else {
|
|
// Treat final trailing '-' as a literal
|
|
add(c, c);
|
|
c = chars.next(opts, literal, ec);
|
|
if (U_FAILURE(ec)) return;
|
|
if (c == 0x5D /*']'*/ && !literal) {
|
|
patLocal.append(HYPHEN_RIGHT_BRACE, 2);
|
|
mode = 2;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
// syntaxError(chars, "'-' not after char or set");
|
|
ec = U_MALFORMED_SET;
|
|
return;
|
|
case INTERSECTION /*'&'*/:
|
|
if (lastItem == 2 && op == 0) {
|
|
op = (UChar) c;
|
|
continue;
|
|
}
|
|
// syntaxError(chars, "'&' not after set");
|
|
ec = U_MALFORMED_SET;
|
|
return;
|
|
case 0x5E /*'^'*/:
|
|
// syntaxError(chars, "'^' not after '['");
|
|
ec = U_MALFORMED_SET;
|
|
return;
|
|
case 0x7B /*'{'*/:
|
|
if (op != 0) {
|
|
// syntaxError(chars, "Missing operand after operator");
|
|
ec = U_MALFORMED_SET;
|
|
return;
|
|
}
|
|
if (lastItem == 1) {
|
|
add(lastChar, lastChar);
|
|
_appendToPat(patLocal, lastChar, FALSE);
|
|
}
|
|
lastItem = 0;
|
|
buf.truncate(0);
|
|
{
|
|
UBool ok = FALSE;
|
|
while (!chars.atEnd()) {
|
|
c = chars.next(opts, literal, ec);
|
|
if (U_FAILURE(ec)) return;
|
|
if (c == 0x7D /*'}'*/ && !literal) {
|
|
ok = TRUE;
|
|
break;
|
|
}
|
|
buf.append(c);
|
|
}
|
|
if (buf.length() < 1 || !ok) {
|
|
// syntaxError(chars, "Invalid multicharacter string");
|
|
ec = U_MALFORMED_SET;
|
|
return;
|
|
}
|
|
}
|
|
// We have new string. Add it to set and continue;
|
|
// we don't need to drop through to the further
|
|
// processing
|
|
add(buf);
|
|
patLocal.append((UChar) 0x7B /*'{'*/);
|
|
_appendToPat(patLocal, buf, FALSE);
|
|
patLocal.append((UChar) 0x7D /*'}'*/);
|
|
continue;
|
|
case SymbolTable::SYMBOL_REF:
|
|
// symbols nosymbols
|
|
// [a-$] error error (ambiguous)
|
|
// [a$] anchor anchor
|
|
// [a-$x] var "x"* literal '$'
|
|
// [a-$.] error literal '$'
|
|
// *We won't get here in the case of var "x"
|
|
{
|
|
chars.getPos(backup);
|
|
c = chars.next(opts, literal, ec);
|
|
if (U_FAILURE(ec)) return;
|
|
UBool anchor = (c == 0x5D /*']'*/ && !literal);
|
|
if (symbols == 0 && !anchor) {
|
|
c = SymbolTable::SYMBOL_REF;
|
|
chars.setPos(backup);
|
|
break; // literal '$'
|
|
}
|
|
if (anchor && op == 0) {
|
|
if (lastItem == 1) {
|
|
add(lastChar, lastChar);
|
|
_appendToPat(patLocal, lastChar, FALSE);
|
|
}
|
|
add(U_ETHER);
|
|
usePat = TRUE;
|
|
patLocal.append((UChar) SymbolTable::SYMBOL_REF);
|
|
patLocal.append((UChar) 0x5D /*']'*/);
|
|
mode = 2;
|
|
continue;
|
|
}
|
|
// syntaxError(chars, "Unquoted '$'");
|
|
ec = U_MALFORMED_SET;
|
|
return;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
// -------- Parse literal characters. This includes both
|
|
// escaped chars ("\u4E01") and non-syntax characters
|
|
// ("a").
|
|
|
|
switch (lastItem) {
|
|
case 0:
|
|
lastItem = 1;
|
|
lastChar = c;
|
|
break;
|
|
case 1:
|
|
if (op == HYPHEN /*'-'*/) {
|
|
if (lastChar >= c) {
|
|
// Don't allow redundant (a-a) or empty (b-a) ranges;
|
|
// these are most likely typos.
|
|
// syntaxError(chars, "Invalid range");
|
|
ec = U_MALFORMED_SET;
|
|
return;
|
|
}
|
|
add(lastChar, c);
|
|
_appendToPat(patLocal, lastChar, FALSE);
|
|
patLocal.append(op);
|
|
_appendToPat(patLocal, c, FALSE);
|
|
lastItem = 0;
|
|
op = 0;
|
|
} else {
|
|
add(lastChar, lastChar);
|
|
_appendToPat(patLocal, lastChar, FALSE);
|
|
lastChar = c;
|
|
}
|
|
break;
|
|
case 2:
|
|
if (op != 0) {
|
|
// syntaxError(chars, "Set expected after operator");
|
|
ec = U_MALFORMED_SET;
|
|
return;
|
|
}
|
|
lastChar = c;
|
|
lastItem = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (mode != 2) {
|
|
// syntaxError(chars, "Missing ']'");
|
|
ec = U_MALFORMED_SET;
|
|
return;
|
|
}
|
|
|
|
chars.skipIgnored(opts);
|
|
|
|
/**
|
|
* Handle global flags (invert, case insensitivity). If this
|
|
* pattern should be compiled case-insensitive, then we need
|
|
* to close over case BEFORE COMPLEMENTING. This makes
|
|
* patterns like /[^abc]/i work.
|
|
*/
|
|
if ((options & USET_CASE_INSENSITIVE) != 0) {
|
|
(this->*caseClosure)(USET_CASE_INSENSITIVE);
|
|
}
|
|
else if ((options & USET_ADD_CASE_MAPPINGS) != 0) {
|
|
(this->*caseClosure)(USET_ADD_CASE_MAPPINGS);
|
|
}
|
|
if (invert) {
|
|
complement();
|
|
}
|
|
|
|
// Use the rebuilt pattern (patLocal) only if necessary. Prefer the
|
|
// generated pattern.
|
|
if (usePat) {
|
|
rebuiltPat.append(patLocal);
|
|
} else {
|
|
_generatePattern(rebuiltPat, FALSE);
|
|
}
|
|
if (isBogus() && U_SUCCESS(ec)) {
|
|
// We likely ran out of memory. AHHH!
|
|
ec = U_MEMORY_ALLOCATION_ERROR;
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------
|
|
// Property set implementation
|
|
//----------------------------------------------------------------
|
|
|
|
static UBool numericValueFilter(UChar32 ch, void* context) {
|
|
return u_getNumericValue(ch) == *(double*)context;
|
|
}
|
|
|
|
static UBool generalCategoryMaskFilter(UChar32 ch, void* context) {
|
|
int32_t value = *(int32_t*)context;
|
|
return (U_GET_GC_MASK((UChar32) ch) & value) != 0;
|
|
}
|
|
|
|
static UBool versionFilter(UChar32 ch, void* context) {
|
|
static const UVersionInfo none = { 0, 0, 0, 0 };
|
|
UVersionInfo v;
|
|
u_charAge(ch, v);
|
|
UVersionInfo* version = (UVersionInfo*)context;
|
|
return uprv_memcmp(&v, &none, sizeof(v)) > 0 && uprv_memcmp(&v, version, sizeof(v)) <= 0;
|
|
}
|
|
|
|
typedef struct {
|
|
UProperty prop;
|
|
int32_t value;
|
|
} IntPropertyContext;
|
|
|
|
static UBool intPropertyFilter(UChar32 ch, void* context) {
|
|
IntPropertyContext* c = (IntPropertyContext*)context;
|
|
return u_getIntPropertyValue((UChar32) ch, c->prop) == c->value;
|
|
}
|
|
|
|
static UBool scriptExtensionsFilter(UChar32 ch, void* context) {
|
|
return uscript_hasScript(ch, *(UScriptCode*)context);
|
|
}
|
|
|
|
/**
|
|
* Generic filter-based scanning code for UCD property UnicodeSets.
|
|
*/
|
|
void UnicodeSet::applyFilter(UnicodeSet::Filter filter,
|
|
void* context,
|
|
int32_t src,
|
|
UErrorCode &status) {
|
|
if (U_FAILURE(status)) return;
|
|
|
|
// Logically, walk through all Unicode characters, noting the start
|
|
// and end of each range for which filter.contain(c) is
|
|
// true. Add each range to a set.
|
|
//
|
|
// To improve performance, use an inclusions set which
|
|
// encodes information about character ranges that are known
|
|
// to have identical properties.
|
|
// getInclusions(src) contains exactly the first characters of
|
|
// same-value ranges for the given properties "source".
|
|
const UnicodeSet* inclusions = getInclusions(src, status);
|
|
if (U_FAILURE(status)) {
|
|
return;
|
|
}
|
|
|
|
clear();
|
|
|
|
UChar32 startHasProperty = -1;
|
|
int32_t limitRange = inclusions->getRangeCount();
|
|
|
|
for (int j=0; j<limitRange; ++j) {
|
|
// get current range
|
|
UChar32 start = inclusions->getRangeStart(j);
|
|
UChar32 end = inclusions->getRangeEnd(j);
|
|
|
|
// for all the code points in the range, process
|
|
for (UChar32 ch = start; ch <= end; ++ch) {
|
|
// only add to this UnicodeSet on inflection points --
|
|
// where the hasProperty value changes to false
|
|
if ((*filter)(ch, context)) {
|
|
if (startHasProperty < 0) {
|
|
startHasProperty = ch;
|
|
}
|
|
} else if (startHasProperty >= 0) {
|
|
add(startHasProperty, ch-1);
|
|
startHasProperty = -1;
|
|
}
|
|
}
|
|
}
|
|
if (startHasProperty >= 0) {
|
|
add((UChar32)startHasProperty, (UChar32)0x10FFFF);
|
|
}
|
|
if (isBogus() && U_SUCCESS(status)) {
|
|
// We likely ran out of memory. AHHH!
|
|
status = U_MEMORY_ALLOCATION_ERROR;
|
|
}
|
|
}
|
|
|
|
static UBool mungeCharName(char* dst, const char* src, int32_t dstCapacity) {
|
|
/* Note: we use ' ' in compiler code page */
|
|
int32_t j = 0;
|
|
char ch;
|
|
--dstCapacity; /* make room for term. zero */
|
|
while ((ch = *src++) != 0) {
|
|
if (ch == ' ' && (j==0 || (j>0 && dst[j-1]==' '))) {
|
|
continue;
|
|
}
|
|
if (j >= dstCapacity) return FALSE;
|
|
dst[j++] = ch;
|
|
}
|
|
if (j > 0 && dst[j-1] == ' ') --j;
|
|
dst[j] = 0;
|
|
return TRUE;
|
|
}
|
|
|
|
//----------------------------------------------------------------
|
|
// Property set API
|
|
//----------------------------------------------------------------
|
|
|
|
#define FAIL(ec) {ec=U_ILLEGAL_ARGUMENT_ERROR; return *this;}
|
|
|
|
UnicodeSet&
|
|
UnicodeSet::applyIntPropertyValue(UProperty prop, int32_t value, UErrorCode& ec) {
|
|
if (U_FAILURE(ec) || isFrozen()) return *this;
|
|
|
|
if (prop == UCHAR_GENERAL_CATEGORY_MASK) {
|
|
applyFilter(generalCategoryMaskFilter, &value, UPROPS_SRC_CHAR, ec);
|
|
} else if (prop == UCHAR_SCRIPT_EXTENSIONS) {
|
|
UScriptCode script = (UScriptCode)value;
|
|
applyFilter(scriptExtensionsFilter, &script, UPROPS_SRC_PROPSVEC, ec);
|
|
} else {
|
|
IntPropertyContext c = {prop, value};
|
|
applyFilter(intPropertyFilter, &c, uprops_getSource(prop), ec);
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
UnicodeSet&
|
|
UnicodeSet::applyPropertyAlias(const UnicodeString& prop,
|
|
const UnicodeString& value,
|
|
UErrorCode& ec) {
|
|
if (U_FAILURE(ec) || isFrozen()) return *this;
|
|
|
|
// prop and value used to be converted to char * using the default
|
|
// converter instead of the invariant conversion.
|
|
// This should not be necessary because all Unicode property and value
|
|
// names use only invariant characters.
|
|
// If there are any variant characters, then we won't find them anyway.
|
|
// Checking first avoids assertion failures in the conversion.
|
|
if( !uprv_isInvariantUString(prop.getBuffer(), prop.length()) ||
|
|
!uprv_isInvariantUString(value.getBuffer(), value.length())
|
|
) {
|
|
FAIL(ec);
|
|
}
|
|
CharString pname, vname;
|
|
pname.appendInvariantChars(prop, ec);
|
|
vname.appendInvariantChars(value, ec);
|
|
if (U_FAILURE(ec)) return *this;
|
|
|
|
UProperty p;
|
|
int32_t v;
|
|
UBool mustNotBeEmpty = FALSE, invert = FALSE;
|
|
|
|
if (value.length() > 0) {
|
|
p = u_getPropertyEnum(pname.data());
|
|
if (p == UCHAR_INVALID_CODE) FAIL(ec);
|
|
|
|
// Treat gc as gcm
|
|
if (p == UCHAR_GENERAL_CATEGORY) {
|
|
p = UCHAR_GENERAL_CATEGORY_MASK;
|
|
}
|
|
|
|
if ((p >= UCHAR_BINARY_START && p < UCHAR_BINARY_LIMIT) ||
|
|
(p >= UCHAR_INT_START && p < UCHAR_INT_LIMIT) ||
|
|
(p >= UCHAR_MASK_START && p < UCHAR_MASK_LIMIT)) {
|
|
v = u_getPropertyValueEnum(p, vname.data());
|
|
if (v == UCHAR_INVALID_CODE) {
|
|
// Handle numeric CCC
|
|
if (p == UCHAR_CANONICAL_COMBINING_CLASS ||
|
|
p == UCHAR_TRAIL_CANONICAL_COMBINING_CLASS ||
|
|
p == UCHAR_LEAD_CANONICAL_COMBINING_CLASS) {
|
|
char* end;
|
|
double value = uprv_strtod(vname.data(), &end);
|
|
v = (int32_t) value;
|
|
if (v != value || v < 0 || *end != 0) {
|
|
// non-integral or negative value, or trailing junk
|
|
FAIL(ec);
|
|
}
|
|
// If the resultant set is empty then the numeric value
|
|
// was invalid.
|
|
mustNotBeEmpty = TRUE;
|
|
} else {
|
|
FAIL(ec);
|
|
}
|
|
}
|
|
}
|
|
|
|
else {
|
|
|
|
switch (p) {
|
|
case UCHAR_NUMERIC_VALUE:
|
|
{
|
|
char* end;
|
|
double value = uprv_strtod(vname.data(), &end);
|
|
if (*end != 0) {
|
|
FAIL(ec);
|
|
}
|
|
applyFilter(numericValueFilter, &value, UPROPS_SRC_CHAR, ec);
|
|
return *this;
|
|
}
|
|
case UCHAR_NAME:
|
|
{
|
|
// Must munge name, since u_charFromName() does not do
|
|
// 'loose' matching.
|
|
char buf[128]; // it suffices that this be > uprv_getMaxCharNameLength
|
|
if (!mungeCharName(buf, vname.data(), sizeof(buf))) FAIL(ec);
|
|
UChar32 ch = u_charFromName(U_EXTENDED_CHAR_NAME, buf, &ec);
|
|
if (U_SUCCESS(ec)) {
|
|
clear();
|
|
add(ch);
|
|
return *this;
|
|
} else {
|
|
FAIL(ec);
|
|
}
|
|
}
|
|
case UCHAR_UNICODE_1_NAME:
|
|
// ICU 49 deprecates the Unicode_1_Name property APIs.
|
|
FAIL(ec);
|
|
case UCHAR_AGE:
|
|
{
|
|
// Must munge name, since u_versionFromString() does not do
|
|
// 'loose' matching.
|
|
char buf[128];
|
|
if (!mungeCharName(buf, vname.data(), sizeof(buf))) FAIL(ec);
|
|
UVersionInfo version;
|
|
u_versionFromString(version, buf);
|
|
applyFilter(versionFilter, &version, UPROPS_SRC_PROPSVEC, ec);
|
|
return *this;
|
|
}
|
|
case UCHAR_SCRIPT_EXTENSIONS:
|
|
v = u_getPropertyValueEnum(UCHAR_SCRIPT, vname.data());
|
|
if (v == UCHAR_INVALID_CODE) {
|
|
FAIL(ec);
|
|
}
|
|
// fall through to calling applyIntPropertyValue()
|
|
break;
|
|
default:
|
|
// p is a non-binary, non-enumerated property that we
|
|
// don't support (yet).
|
|
FAIL(ec);
|
|
}
|
|
}
|
|
}
|
|
|
|
else {
|
|
// value is empty. Interpret as General Category, Script, or
|
|
// Binary property.
|
|
p = UCHAR_GENERAL_CATEGORY_MASK;
|
|
v = u_getPropertyValueEnum(p, pname.data());
|
|
if (v == UCHAR_INVALID_CODE) {
|
|
p = UCHAR_SCRIPT;
|
|
v = u_getPropertyValueEnum(p, pname.data());
|
|
if (v == UCHAR_INVALID_CODE) {
|
|
p = u_getPropertyEnum(pname.data());
|
|
if (p >= UCHAR_BINARY_START && p < UCHAR_BINARY_LIMIT) {
|
|
v = 1;
|
|
} else if (0 == uprv_comparePropertyNames(ANY, pname.data())) {
|
|
set(MIN_VALUE, MAX_VALUE);
|
|
return *this;
|
|
} else if (0 == uprv_comparePropertyNames(ASCII, pname.data())) {
|
|
set(0, 0x7F);
|
|
return *this;
|
|
} else if (0 == uprv_comparePropertyNames(ASSIGNED, pname.data())) {
|
|
// [:Assigned:]=[:^Cn:]
|
|
p = UCHAR_GENERAL_CATEGORY_MASK;
|
|
v = U_GC_CN_MASK;
|
|
invert = TRUE;
|
|
} else {
|
|
FAIL(ec);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
applyIntPropertyValue(p, v, ec);
|
|
if(invert) {
|
|
complement();
|
|
}
|
|
|
|
if (U_SUCCESS(ec) && (mustNotBeEmpty && isEmpty())) {
|
|
// mustNotBeEmpty is set to true if an empty set indicates
|
|
// invalid input.
|
|
ec = U_ILLEGAL_ARGUMENT_ERROR;
|
|
}
|
|
|
|
if (isBogus() && U_SUCCESS(ec)) {
|
|
// We likely ran out of memory. AHHH!
|
|
ec = U_MEMORY_ALLOCATION_ERROR;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
//----------------------------------------------------------------
|
|
// Property set patterns
|
|
//----------------------------------------------------------------
|
|
|
|
/**
|
|
* Return true if the given position, in the given pattern, appears
|
|
* to be the start of a property set pattern.
|
|
*/
|
|
UBool UnicodeSet::resemblesPropertyPattern(const UnicodeString& pattern,
|
|
int32_t pos) {
|
|
// Patterns are at least 5 characters long
|
|
if ((pos+5) > pattern.length()) {
|
|
return FALSE;
|
|
}
|
|
|
|
// Look for an opening [:, [:^, \p, or \P
|
|
return isPOSIXOpen(pattern, pos) || isPerlOpen(pattern, pos) || isNameOpen(pattern, pos);
|
|
}
|
|
|
|
/**
|
|
* Return true if the given iterator appears to point at a
|
|
* property pattern. Regardless of the result, return with the
|
|
* iterator unchanged.
|
|
* @param chars iterator over the pattern characters. Upon return
|
|
* it will be unchanged.
|
|
* @param iterOpts RuleCharacterIterator options
|
|
*/
|
|
UBool UnicodeSet::resemblesPropertyPattern(RuleCharacterIterator& chars,
|
|
int32_t iterOpts) {
|
|
// NOTE: literal will always be FALSE, because we don't parse escapes.
|
|
UBool result = FALSE, literal;
|
|
UErrorCode ec = U_ZERO_ERROR;
|
|
iterOpts &= ~RuleCharacterIterator::PARSE_ESCAPES;
|
|
RuleCharacterIterator::Pos pos;
|
|
chars.getPos(pos);
|
|
UChar32 c = chars.next(iterOpts, literal, ec);
|
|
if (c == 0x5B /*'['*/ || c == 0x5C /*'\\'*/) {
|
|
UChar32 d = chars.next(iterOpts & ~RuleCharacterIterator::SKIP_WHITESPACE,
|
|
literal, ec);
|
|
result = (c == 0x5B /*'['*/) ? (d == 0x3A /*':'*/) :
|
|
(d == 0x4E /*'N'*/ || d == 0x70 /*'p'*/ || d == 0x50 /*'P'*/);
|
|
}
|
|
chars.setPos(pos);
|
|
return result && U_SUCCESS(ec);
|
|
}
|
|
|
|
/**
|
|
* Parse the given property pattern at the given parse position.
|
|
*/
|
|
UnicodeSet& UnicodeSet::applyPropertyPattern(const UnicodeString& pattern,
|
|
ParsePosition& ppos,
|
|
UErrorCode &ec) {
|
|
int32_t pos = ppos.getIndex();
|
|
|
|
UBool posix = FALSE; // true for [:pat:], false for \p{pat} \P{pat} \N{pat}
|
|
UBool isName = FALSE; // true for \N{pat}, o/w false
|
|
UBool invert = FALSE;
|
|
|
|
if (U_FAILURE(ec)) return *this;
|
|
|
|
// Minimum length is 5 characters, e.g. \p{L}
|
|
if ((pos+5) > pattern.length()) {
|
|
FAIL(ec);
|
|
}
|
|
|
|
// On entry, ppos should point to one of the following locations:
|
|
// Look for an opening [:, [:^, \p, or \P
|
|
if (isPOSIXOpen(pattern, pos)) {
|
|
posix = TRUE;
|
|
pos += 2;
|
|
pos = ICU_Utility::skipWhitespace(pattern, pos);
|
|
if (pos < pattern.length() && pattern.charAt(pos) == COMPLEMENT) {
|
|
++pos;
|
|
invert = TRUE;
|
|
}
|
|
} else if (isPerlOpen(pattern, pos) || isNameOpen(pattern, pos)) {
|
|
UChar c = pattern.charAt(pos+1);
|
|
invert = (c == UPPER_P);
|
|
isName = (c == UPPER_N);
|
|
pos += 2;
|
|
pos = ICU_Utility::skipWhitespace(pattern, pos);
|
|
if (pos == pattern.length() || pattern.charAt(pos++) != OPEN_BRACE) {
|
|
// Syntax error; "\p" or "\P" not followed by "{"
|
|
FAIL(ec);
|
|
}
|
|
} else {
|
|
// Open delimiter not seen
|
|
FAIL(ec);
|
|
}
|
|
|
|
// Look for the matching close delimiter, either :] or }
|
|
int32_t close;
|
|
if (posix) {
|
|
close = pattern.indexOf(POSIX_CLOSE, 2, pos);
|
|
} else {
|
|
close = pattern.indexOf(CLOSE_BRACE, pos);
|
|
}
|
|
if (close < 0) {
|
|
// Syntax error; close delimiter missing
|
|
FAIL(ec);
|
|
}
|
|
|
|
// Look for an '=' sign. If this is present, we will parse a
|
|
// medium \p{gc=Cf} or long \p{GeneralCategory=Format}
|
|
// pattern.
|
|
int32_t equals = pattern.indexOf(EQUALS, pos);
|
|
UnicodeString propName, valueName;
|
|
if (equals >= 0 && equals < close && !isName) {
|
|
// Equals seen; parse medium/long pattern
|
|
pattern.extractBetween(pos, equals, propName);
|
|
pattern.extractBetween(equals+1, close, valueName);
|
|
}
|
|
|
|
else {
|
|
// Handle case where no '=' is seen, and \N{}
|
|
pattern.extractBetween(pos, close, propName);
|
|
|
|
// Handle \N{name}
|
|
if (isName) {
|
|
// This is a little inefficient since it means we have to
|
|
// parse NAME_PROP back to UCHAR_NAME even though we already
|
|
// know it's UCHAR_NAME. If we refactor the API to
|
|
// support args of (UProperty, char*) then we can remove
|
|
// NAME_PROP and make this a little more efficient.
|
|
valueName = propName;
|
|
propName = UnicodeString(NAME_PROP, NAME_PROP_LENGTH, US_INV);
|
|
}
|
|
}
|
|
|
|
applyPropertyAlias(propName, valueName, ec);
|
|
|
|
if (U_SUCCESS(ec)) {
|
|
if (invert) {
|
|
complement();
|
|
}
|
|
|
|
// Move to the limit position after the close delimiter if the
|
|
// parse succeeded.
|
|
ppos.setIndex(close + (posix ? 2 : 1));
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
/**
|
|
* Parse a property pattern.
|
|
* @param chars iterator over the pattern characters. Upon return
|
|
* it will be advanced to the first character after the parsed
|
|
* pattern, or the end of the iteration if all characters are
|
|
* parsed.
|
|
* @param rebuiltPat the pattern that was parsed, rebuilt or
|
|
* copied from the input pattern, as appropriate.
|
|
*/
|
|
void UnicodeSet::applyPropertyPattern(RuleCharacterIterator& chars,
|
|
UnicodeString& rebuiltPat,
|
|
UErrorCode& ec) {
|
|
if (U_FAILURE(ec)) return;
|
|
UnicodeString pattern;
|
|
chars.lookahead(pattern);
|
|
ParsePosition pos(0);
|
|
applyPropertyPattern(pattern, pos, ec);
|
|
if (U_FAILURE(ec)) return;
|
|
if (pos.getIndex() == 0) {
|
|
// syntaxError(chars, "Invalid property pattern");
|
|
ec = U_MALFORMED_SET;
|
|
return;
|
|
}
|
|
chars.jumpahead(pos.getIndex());
|
|
rebuiltPat.append(pattern, 0, pos.getIndex());
|
|
}
|
|
|
|
U_NAMESPACE_END
|