// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ******************************************************************************* * * Copyright (C) 1999-2014, International Business Machines * Corporation and others. All Rights Reserved. * ******************************************************************************* * file name: uniset_props.cpp * encoding: UTF-8 * tab size: 8 (not used) * indentation:4 * * created on: 2004aug25 * created by: Markus W. Scherer * * Character property dependent functions moved here from uniset.cpp */ #include "unicode/utypes.h" #include "unicode/uniset.h" #include "unicode/parsepos.h" #include "unicode/uchar.h" #include "unicode/uscript.h" #include "unicode/symtable.h" #include "unicode/uset.h" #include "unicode/locid.h" #include "unicode/brkiter.h" #include "uset_imp.h" #include "ruleiter.h" #include "cmemory.h" #include "ucln_cmn.h" #include "util.h" #include "uvector.h" #include "uprops.h" #include "propname.h" #include "normalizer2impl.h" #include "uinvchar.h" #include "uprops.h" #include "charstr.h" #include "cstring.h" #include "mutex.h" #include "umutex.h" #include "uassert.h" #include "hash.h" U_NAMESPACE_USE // Special property set IDs static const char ANY[] = "ANY"; // [\u0000-\U0010FFFF] static const char ASCII[] = "ASCII"; // [\u0000-\u007F] static const char ASSIGNED[] = "Assigned"; // [:^Cn:] // Unicode name property alias #define NAME_PROP "na" #define NAME_PROP_LENGTH 2 // Cached sets ------------------------------------------------------------- *** U_CDECL_BEGIN static UBool U_CALLCONV uset_cleanup(); static UnicodeSet *uni32Singleton; static icu::UInitOnce uni32InitOnce {}; /** * Cleanup function for UnicodeSet */ static UBool U_CALLCONV uset_cleanup(void) { delete uni32Singleton; uni32Singleton = NULL; uni32InitOnce.reset(); return true; } U_CDECL_END U_NAMESPACE_BEGIN namespace { // Cache some sets for other services -------------------------------------- *** void U_CALLCONV createUni32Set(UErrorCode &errorCode) { U_ASSERT(uni32Singleton == NULL); uni32Singleton = new UnicodeSet(UNICODE_STRING_SIMPLE("[:age=3.2:]"), errorCode); if(uni32Singleton==NULL) { errorCode=U_MEMORY_ALLOCATION_ERROR; } else { uni32Singleton->freeze(); } ucln_common_registerCleanup(UCLN_COMMON_USET, uset_cleanup); } U_CFUNC UnicodeSet * uniset_getUnicode32Instance(UErrorCode &errorCode) { umtx_initOnce(uni32InitOnce, &createUni32Set, errorCode); return uni32Singleton; } // helper functions for matching of pattern syntax pieces ------------------ *** // these functions are parallel to the PERL_OPEN etc. strings above // using these functions is not only faster than UnicodeString::compare() and // caseCompare(), but they also make UnicodeSet work for simple patterns when // no Unicode properties data is available - when caseCompare() fails static inline UBool isPerlOpen(const UnicodeString &pattern, int32_t pos) { UChar c; return pattern.charAt(pos)==u'\\' && ((c=pattern.charAt(pos+1))==u'p' || c==u'P'); } /*static inline UBool isPerlClose(const UnicodeString &pattern, int32_t pos) { return pattern.charAt(pos)==u'}'; }*/ static inline UBool isNameOpen(const UnicodeString &pattern, int32_t pos) { return pattern.charAt(pos)==u'\\' && pattern.charAt(pos+1)==u'N'; } static inline UBool isPOSIXOpen(const UnicodeString &pattern, int32_t pos) { return pattern.charAt(pos)==u'[' && pattern.charAt(pos+1)==u':'; } /*static inline UBool isPOSIXClose(const UnicodeString &pattern, int32_t pos) { return pattern.charAt(pos)==u':' && pattern.charAt(pos+1)==u']'; }*/ // TODO memory debugging provided inside uniset.cpp // could be made available here but probably obsolete with use of modern // memory leak checker tools #define _dbgct(me) } // namespace //---------------------------------------------------------------- // Constructors &c //---------------------------------------------------------------- /** * Constructs a set from the given pattern, optionally ignoring * white space. See the class description for the syntax of the * pattern language. * @param pattern a string specifying what characters are in the set */ UnicodeSet::UnicodeSet(const UnicodeString& pattern, UErrorCode& status) { applyPattern(pattern, status); _dbgct(this); } //---------------------------------------------------------------- // Public API //---------------------------------------------------------------- UnicodeSet& UnicodeSet::applyPattern(const UnicodeString& pattern, UErrorCode& status) { // Equivalent to // return applyPattern(pattern, USET_IGNORE_SPACE, NULL, status); // but without dependency on closeOver(). ParsePosition pos(0); applyPatternIgnoreSpace(pattern, pos, NULL, status); if (U_FAILURE(status)) return *this; int32_t i = pos.getIndex(); // Skip over trailing whitespace ICU_Utility::skipWhitespace(pattern, i, true); if (i != pattern.length()) { status = U_ILLEGAL_ARGUMENT_ERROR; } return *this; } void UnicodeSet::applyPatternIgnoreSpace(const UnicodeString& pattern, ParsePosition& pos, const SymbolTable* symbols, UErrorCode& status) { if (U_FAILURE(status)) { return; } if (isFrozen()) { status = U_NO_WRITE_PERMISSION; return; } // Need to build the pattern in a temporary string because // _applyPattern calls add() etc., which set pat to empty. UnicodeString rebuiltPat; RuleCharacterIterator chars(pattern, symbols, pos); applyPattern(chars, symbols, rebuiltPat, USET_IGNORE_SPACE, NULL, 0, status); if (U_FAILURE(status)) return; if (chars.inVariable()) { // syntaxError(chars, "Extra chars in variable value"); status = U_MALFORMED_SET; return; } setPattern(rebuiltPat); } /** * Return true if the given position, in the given pattern, appears * to be the start of a UnicodeSet pattern. */ UBool UnicodeSet::resemblesPattern(const UnicodeString& pattern, int32_t pos) { return ((pos+1) < pattern.length() && pattern.charAt(pos) == (UChar)91/*[*/) || resemblesPropertyPattern(pattern, pos); } //---------------------------------------------------------------- // Implementation: Pattern parsing //---------------------------------------------------------------- namespace { /** * A small all-inline class to manage a UnicodeSet pointer. Add * operator->() etc. as needed. */ class UnicodeSetPointer { UnicodeSet* p; public: inline UnicodeSetPointer() : p(0) {} inline ~UnicodeSetPointer() { delete p; } inline UnicodeSet* pointer() { return p; } inline UBool allocate() { if (p == 0) { p = new UnicodeSet(); } return p != 0; } }; constexpr int32_t MAX_DEPTH = 100; } // namespace /** * Parse the pattern from the given RuleCharacterIterator. The * iterator is advanced over the parsed 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 symbols symbol table to use to parse and dereference * variables, or null if none. * @param rebuiltPat the pattern that was parsed, rebuilt or * copied from the input pattern, as appropriate. * @param options a bit mask of zero or more of the following: * IGNORE_SPACE, CASE. */ void UnicodeSet::applyPattern(RuleCharacterIterator& chars, const SymbolTable* symbols, UnicodeString& rebuiltPat, uint32_t options, UnicodeSet& (UnicodeSet::*caseClosure)(int32_t attribute), int32_t depth, UErrorCode& ec) { if (U_FAILURE(ec)) return; if (depth > MAX_DEPTH) { ec = U_ILLEGAL_ARGUMENT_ERROR; return; } // Syntax characters: [ ] ^ - & { } // Recognized special forms for chars, sets: c-c s-s s&s int32_t opts = RuleCharacterIterator::PARSE_VARIABLES | RuleCharacterIterator::PARSE_ESCAPES; if ((options & USET_IGNORE_SPACE) != 0) { opts |= RuleCharacterIterator::SKIP_WHITESPACE; } UnicodeString patLocal, buf; UBool usePat = false; UnicodeSetPointer scratch; RuleCharacterIterator::Pos backup; // mode: 0=before [, 1=between [...], 2=after ] // lastItem: 0=none, 1=char, 2=set int8_t lastItem = 0, mode = 0; UChar32 lastChar = 0; UChar op = 0; UBool invert = false; clear(); while (mode != 2 && !chars.atEnd()) { U_ASSERT((lastItem == 0 && op == 0) || (lastItem == 1 && (op == 0 || op == u'-')) || (lastItem == 2 && (op == 0 || op == u'-' || op == u'&'))); UChar32 c = 0; UBool literal = false; UnicodeSet* nested = 0; // alias - do not delete // -------- Check for property pattern // setMode: 0=none, 1=unicodeset, 2=propertypat, 3=preparsed int8_t setMode = 0; if (resemblesPropertyPattern(chars, opts)) { setMode = 2; } // -------- Parse '[' of opening delimiter OR nested set. // If there is a nested set, use `setMode' to define how // the set should be parsed. If the '[' is part of the // opening delimiter for this pattern, parse special // strings "[", "[^", "[-", and "[^-". Check for stand-in // characters representing a nested set in the symbol // table. else { // Prepare to backup if necessary chars.getPos(backup); c = chars.next(opts, literal, ec); if (U_FAILURE(ec)) return; if (c == u'[' && !literal) { if (mode == 1) { chars.setPos(backup); // backup setMode = 1; } else { // Handle opening '[' delimiter mode = 1; patLocal.append(u'['); chars.getPos(backup); // prepare to backup c = chars.next(opts, literal, ec); if (U_FAILURE(ec)) return; if (c == u'^' && !literal) { invert = true; patLocal.append(u'^'); 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 == u'-') { 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(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(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 == u'-' || op == u'&') { 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, depth + 1, 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 u'-': removeAll(*nested); break; case u'&': 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 u']': if (lastItem == 1) { add(lastChar, lastChar); _appendToPat(patLocal, lastChar, false); } // Treat final trailing '-' as a literal if (op == u'-') { add(op, op); patLocal.append(op); } else if (op == u'&') { // syntaxError(chars, "Trailing '&'"); ec = U_MALFORMED_SET; return; } patLocal.append(u']'); mode = 2; continue; case u'-': 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 == u']' && !literal) { patLocal.append(u"-]", 2); mode = 2; continue; } } } // syntaxError(chars, "'-' not after char or set"); ec = U_MALFORMED_SET; return; case u'&': if (lastItem == 2 && op == 0) { op = (UChar) c; continue; } // syntaxError(chars, "'&' not after set"); ec = U_MALFORMED_SET; return; case u'^': // syntaxError(chars, "'^' not after '['"); ec = U_MALFORMED_SET; return; case u'{': 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 == u'}' && !literal) { ok = true; break; } buf.append(c); } if (!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(u'{'); _appendToPat(patLocal, buf, false); patLocal.append(u'}'); 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 == u']' && !literal); if (symbols == 0 && !anchor) { c = SymbolTable::SYMBOL_REF; chars.setPos(backup); break; // literal '$' } if (anchor && op == 0) { if (lastItem == 1) { add(lastChar, lastChar); _appendToPat(patLocal, lastChar, false); } add(U_ETHER); usePat = true; patLocal.append((UChar) SymbolTable::SYMBOL_REF); patLocal.append(u']'); mode = 2; continue; } // syntaxError(chars, "Unquoted '$'"); 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 == u'-') { 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().removeAllStrings(); // code point 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 //---------------------------------------------------------------- namespace { 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); } } // namespace /** * Generic filter-based scanning code for UCD property UnicodeSets. */ void UnicodeSet::applyFilter(UnicodeSet::Filter filter, void* context, const UnicodeSet* inclusions, 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. // inclusions contains the first characters of // same-value ranges for the given property. clear(); UChar32 startHasProperty = -1; int32_t limitRange = inclusions->getRangeCount(); for (int j=0; jgetRangeStart(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; } } namespace { 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; } } // namespace //---------------------------------------------------------------- // Property set API //---------------------------------------------------------------- #define FAIL(ec) UPRV_BLOCK_MACRO_BEGIN { \ ec=U_ILLEGAL_ARGUMENT_ERROR; \ return *this; \ } UPRV_BLOCK_MACRO_END UnicodeSet& UnicodeSet::applyIntPropertyValue(UProperty prop, int32_t value, UErrorCode& ec) { if (U_FAILURE(ec) || isFrozen()) { return *this; } if (prop == UCHAR_GENERAL_CATEGORY_MASK) { const UnicodeSet* inclusions = CharacterProperties::getInclusionsForProperty(prop, ec); applyFilter(generalCategoryMaskFilter, &value, inclusions, ec); } else if (prop == UCHAR_SCRIPT_EXTENSIONS) { const UnicodeSet* inclusions = CharacterProperties::getInclusionsForProperty(prop, ec); UScriptCode script = (UScriptCode)value; applyFilter(scriptExtensionsFilter, &script, inclusions, ec); } else if (0 <= prop && prop < UCHAR_BINARY_LIMIT) { if (value == 0 || value == 1) { const USet *set = u_getBinaryPropertySet(prop, &ec); if (U_FAILURE(ec)) { return *this; } copyFrom(*UnicodeSet::fromUSet(set), true); if (value == 0) { complement().removeAllStrings(); // code point complement } } else { clear(); } } else if (UCHAR_INT_START <= prop && prop < UCHAR_INT_LIMIT) { const UnicodeSet* inclusions = CharacterProperties::getInclusionsForProperty(prop, ec); IntPropertyContext c = {prop, value}; applyFilter(intPropertyFilter, &c, inclusions, ec); } else { ec = U_ILLEGAL_ARGUMENT_ERROR; } 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 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 val = uprv_strtod(vname.data(), &end); // Anything between 0 and 255 is valid even if unused. // Cast double->int only after range check. // We catch NaN here because comparing it with both 0 and 255 will be false // (as are all comparisons with NaN). if (*end != 0 || !(0 <= val && val <= 255) || (v = (int32_t)val) != val) { // non-integral value or outside 0..255, or trailing junk FAIL(ec); } } else { FAIL(ec); } } } else { switch (p) { case UCHAR_NUMERIC_VALUE: { char* end; double val = uprv_strtod(vname.data(), &end); if (*end != 0) { FAIL(ec); } applyFilter(numericValueFilter, &val, CharacterProperties::getInclusionsForProperty(p, ec), 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, CharacterProperties::getInclusionsForProperty(p, ec), 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().removeAllStrings(); // code point complement } 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 == u'[' || c == u'\\') { UChar32 d = chars.next(iterOpts & ~RuleCharacterIterator::SKIP_WHITESPACE, literal, ec); result = (c == u'[') ? (d == u':') : (d == u'N' || d == u'p' || d == u'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) == u'^') { ++pos; invert = true; } } else if (isPerlOpen(pattern, pos) || isNameOpen(pattern, pos)) { UChar c = pattern.charAt(pos+1); invert = (c == u'P'); isName = (c == u'N'); pos += 2; pos = ICU_Utility::skipWhitespace(pattern, pos); if (pos == pattern.length() || pattern.charAt(pos++) != u'{') { // 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(u":]", 2, pos); } else { close = pattern.indexOf(u'}', 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(u'=', 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().removeAllStrings(); // code point 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