| // |
| // regexst.h |
| // |
| // Copyright (C) 2004-2012, International Business Machines Corporation and others. |
| // All Rights Reserved. |
| // |
| // This file contains class RegexStaticSets |
| // |
| // This class is internal to the regular expression implementation. |
| // For the public Regular Expression API, see the file "unicode/regex.h" |
| // |
| // RegexStaticSets groups together the common UnicodeSets that are needed |
| // for compiling or executing RegularExpressions. This grouping simplifies |
| // the thread safe lazy creation and sharing of these sets across |
| // all instances of regular expressions. |
| // |
| #include "unicode/utypes.h" |
| |
| #if !UCONFIG_NO_REGULAR_EXPRESSIONS |
| |
| #include "unicode/unistr.h" |
| #include "unicode/uniset.h" |
| #include "unicode/uchar.h" |
| #include "unicode/regex.h" |
| #include "uprops.h" |
| #include "cmemory.h" |
| #include "cstring.h" |
| #include "uassert.h" |
| #include "ucln_in.h" |
| #include "umutex.h" |
| |
| #include "regexcst.h" // Contains state table for the regex pattern parser. |
| // generated by a Perl script. |
| #include "regexst.h" |
| |
| |
| |
| U_NAMESPACE_BEGIN |
| |
| |
| //------------------------------------------------------------------------------ |
| // |
| // Unicode Set pattern strings for all of the required constant sets. |
| // Initialized with hex values for portability to EBCDIC based machines. |
| // Really ugly, but there's no good way to avoid it. |
| // |
| //------------------------------------------------------------------------------ |
| |
| // "Rule Char" Characters are those with no special meaning, and therefore do not |
| // need to be escaped to appear as literals in a regexp. Expressed |
| // as the inverse of those needing escaping -- [^\*\?\+\[\(\)\{\}\^\$\|\\\.] |
| static const UChar gRuleSet_rule_char_pattern[] = { |
| // [ ^ \ * \ ? \ + \ [ \ ( / ) |
| 0x5b, 0x5e, 0x5c, 0x2a, 0x5c, 0x3f, 0x5c, 0x2b, 0x5c, 0x5b, 0x5c, 0x28, 0x5c, 0x29, |
| // \ { \ } \ ^ \ $ \ | \ \ \ . ] |
| 0x5c, 0x7b,0x5c, 0x7d, 0x5c, 0x5e, 0x5c, 0x24, 0x5c, 0x7c, 0x5c, 0x5c, 0x5c, 0x2e, 0x5d, 0}; |
| |
| |
| static const UChar gRuleSet_digit_char_pattern[] = { |
| // [ 0 - 9 ] |
| 0x5b, 0x30, 0x2d, 0x39, 0x5d, 0}; |
| |
| // |
| // Here are the backslash escape characters that ICU's unescape() function |
| // will handle. |
| // |
| static const UChar gUnescapeCharPattern[] = { |
| // [ a c e f n r t u U x ] |
| 0x5b, 0x61, 0x63, 0x65, 0x66, 0x6e, 0x72, 0x74, 0x75, 0x55, 0x78, 0x5d, 0}; |
| |
| |
| // |
| // Unicode Set Definitions for Regular Expression \w |
| // |
| static const UChar gIsWordPattern[] = { |
| // [ \ p { A l p h a b e t i c } |
| 0x5b, 0x5c, 0x70, 0x7b, 0x61, 0x6c, 0x70, 0x68, 0x61, 0x62, 0x65, 0x74, 0x69, 0x63, 0x7d, |
| // \ p { M } Mark |
| 0x5c, 0x70, 0x7b, 0x4d, 0x7d, |
| // \ p { N d } Digit_Numeric |
| 0x5c, 0x70, 0x7b, 0x4e, 0x64, 0x7d, |
| // \ p { P c } Connector_Punctuation |
| 0x5c, 0x70, 0x7b, 0x50, 0x63, 0x7d, |
| // \ u 2 0 0 c \ u 2 0 0 d ] |
| 0x5c, 0x75, 0x32, 0x30, 0x30, 0x63, 0x5c, 0x75, 0x32, 0x30, 0x30, 0x64, 0x5d, 0}; |
| |
| |
| // |
| // Unicode Set Definitions for Regular Expression \s |
| // |
| static const UChar gIsSpacePattern[] = { |
| // [ \ p { W h i t e S p a c e } ] |
| 0x5b, 0x5c, 0x70, 0x7b, 0x57, 0x68, 0x69, 0x74, 0x65, 0x53, 0x70, 0x61, 0x63, 0x65, 0x7d, 0x5d, 0}; |
| |
| |
| // |
| // UnicodeSets used in implementation of Grapheme Cluster detection, \X |
| // |
| static const UChar gGC_ControlPattern[] = { |
| // [ [ : Z l : ] [ : Z p : ] |
| 0x5b, 0x5b, 0x3a, 0x5A, 0x6c, 0x3a, 0x5d, 0x5b, 0x3a, 0x5A, 0x70, 0x3a, 0x5d, |
| // [ : C c : ] [ : C f : ] - |
| 0x5b, 0x3a, 0x43, 0x63, 0x3a, 0x5d, 0x5b, 0x3a, 0x43, 0x66, 0x3a, 0x5d, 0x2d, |
| // [ : G r a p h e m e _ |
| 0x5b, 0x3a, 0x47, 0x72, 0x61, 0x70, 0x68, 0x65, 0x6d, 0x65, 0x5f, |
| // E x t e n d : ] ] |
| 0x45, 0x78, 0x74, 0x65, 0x6e, 0x64, 0x3a, 0x5d, 0x5d, 0}; |
| |
| static const UChar gGC_ExtendPattern[] = { |
| // [ \ p { G r a p h e m e _ |
| 0x5b, 0x5c, 0x70, 0x7b, 0x47, 0x72, 0x61, 0x70, 0x68, 0x65, 0x6d, 0x65, 0x5f, |
| // E x t e n d } ] |
| 0x45, 0x78, 0x74, 0x65, 0x6e, 0x64, 0x7d, 0x5d, 0}; |
| |
| static const UChar gGC_LPattern[] = { |
| // [ \ p { H a n g u l _ S y l |
| 0x5b, 0x5c, 0x70, 0x7b, 0x48, 0x61, 0x6e, 0x67, 0x75, 0x6c, 0x5f, 0x53, 0x79, 0x6c, |
| // l a b l e _ T y p e = L } ] |
| 0x6c, 0x61, 0x62, 0x6c, 0x65, 0x5f, 0x54, 0x79, 0x70, 0x65, 0x3d, 0x4c, 0x7d, 0x5d, 0}; |
| |
| static const UChar gGC_VPattern[] = { |
| // [ \ p { H a n g u l _ S y l |
| 0x5b, 0x5c, 0x70, 0x7b, 0x48, 0x61, 0x6e, 0x67, 0x75, 0x6c, 0x5f, 0x53, 0x79, 0x6c, |
| // l a b l e _ T y p e = V } ] |
| 0x6c, 0x61, 0x62, 0x6c, 0x65, 0x5f, 0x54, 0x79, 0x70, 0x65, 0x3d, 0x56, 0x7d, 0x5d, 0}; |
| |
| static const UChar gGC_TPattern[] = { |
| // [ \ p { H a n g u l _ S y l |
| 0x5b, 0x5c, 0x70, 0x7b, 0x48, 0x61, 0x6e, 0x67, 0x75, 0x6c, 0x5f, 0x53, 0x79, 0x6c, |
| // l a b l e _ T y p e = T } ] |
| 0x6c, 0x61, 0x62, 0x6c, 0x65, 0x5f, 0x54, 0x79, 0x70, 0x65, 0x3d, 0x54, 0x7d, 0x5d, 0}; |
| |
| static const UChar gGC_LVPattern[] = { |
| // [ \ p { H a n g u l _ S y l |
| 0x5b, 0x5c, 0x70, 0x7b, 0x48, 0x61, 0x6e, 0x67, 0x75, 0x6c, 0x5f, 0x53, 0x79, 0x6c, |
| // l a b l e _ T y p e = L V } ] |
| 0x6c, 0x61, 0x62, 0x6c, 0x65, 0x5f, 0x54, 0x79, 0x70, 0x65, 0x3d, 0x4c, 0x56, 0x7d, 0x5d, 0}; |
| |
| static const UChar gGC_LVTPattern[] = { |
| // [ \ p { H a n g u l _ S y l |
| 0x5b, 0x5c, 0x70, 0x7b, 0x48, 0x61, 0x6e, 0x67, 0x75, 0x6c, 0x5f, 0x53, 0x79, 0x6c, |
| // l a b l e _ T y p e = L V T } ] |
| 0x6c, 0x61, 0x62, 0x6c, 0x65, 0x5f, 0x54, 0x79, 0x70, 0x65, 0x3d, 0x4c, 0x56, 0x54, 0x7d, 0x5d, 0}; |
| |
| |
| RegexStaticSets *RegexStaticSets::gStaticSets = NULL; |
| |
| RegexStaticSets::RegexStaticSets(UErrorCode *status) |
| : |
| fUnescapeCharSet(UnicodeString(TRUE, gUnescapeCharPattern, -1), *status), |
| fRuleDigitsAlias(NULL), |
| fEmptyText(NULL) |
| { |
| // First zero out everything |
| int i; |
| for (i=0; i<URX_LAST_SET; i++) { |
| fPropSets[i] = NULL; |
| } |
| // Then init the sets to their correct values. |
| fPropSets[URX_ISWORD_SET] = new UnicodeSet(UnicodeString(TRUE, gIsWordPattern, -1), *status); |
| fPropSets[URX_ISSPACE_SET] = new UnicodeSet(UnicodeString(TRUE, gIsSpacePattern, -1), *status); |
| fPropSets[URX_GC_EXTEND] = new UnicodeSet(UnicodeString(TRUE, gGC_ExtendPattern, -1), *status); |
| fPropSets[URX_GC_CONTROL] = new UnicodeSet(UnicodeString(TRUE, gGC_ControlPattern, -1), *status); |
| fPropSets[URX_GC_L] = new UnicodeSet(UnicodeString(TRUE, gGC_LPattern, -1), *status); |
| fPropSets[URX_GC_V] = new UnicodeSet(UnicodeString(TRUE, gGC_VPattern, -1), *status); |
| fPropSets[URX_GC_T] = new UnicodeSet(UnicodeString(TRUE, gGC_TPattern, -1), *status); |
| fPropSets[URX_GC_LV] = new UnicodeSet(UnicodeString(TRUE, gGC_LVPattern, -1), *status); |
| fPropSets[URX_GC_LVT] = new UnicodeSet(UnicodeString(TRUE, gGC_LVTPattern, -1), *status); |
| |
| // Check for null pointers |
| if (fPropSets[URX_ISWORD_SET] == NULL || fPropSets[URX_ISSPACE_SET] == NULL || fPropSets[URX_GC_EXTEND] == NULL || |
| fPropSets[URX_GC_CONTROL] == NULL || fPropSets[URX_GC_L] == NULL || fPropSets[URX_GC_V] == NULL || |
| fPropSets[URX_GC_T] == NULL || fPropSets[URX_GC_LV] == NULL || fPropSets[URX_GC_LVT] == NULL) { |
| goto ExitConstrDeleteAll; |
| } |
| if (U_FAILURE(*status)) { |
| // Bail out if we were unable to create the above sets. |
| // The rest of the initialization needs them, so we cannot proceed. |
| return; |
| } |
| |
| |
| // |
| // The following sets are dynamically constructed, because their |
| // initialization strings would be unreasonable. |
| // |
| |
| |
| // |
| // "Normal" is the set of characters that don't need special handling |
| // when finding grapheme cluster boundaries. |
| // |
| fPropSets[URX_GC_NORMAL] = new UnicodeSet(0, UnicodeSet::MAX_VALUE); |
| // Null pointer check |
| if (fPropSets[URX_GC_NORMAL] == NULL) { |
| goto ExitConstrDeleteAll; |
| } |
| fPropSets[URX_GC_NORMAL]->remove(0xac00, 0xd7a4); |
| fPropSets[URX_GC_NORMAL]->removeAll(*fPropSets[URX_GC_CONTROL]); |
| fPropSets[URX_GC_NORMAL]->removeAll(*fPropSets[URX_GC_L]); |
| fPropSets[URX_GC_NORMAL]->removeAll(*fPropSets[URX_GC_V]); |
| fPropSets[URX_GC_NORMAL]->removeAll(*fPropSets[URX_GC_T]); |
| |
| // Initialize the 8-bit fast bit sets from the parallel full |
| // UnicodeSets. |
| for (i=0; i<URX_LAST_SET; i++) { |
| if (fPropSets[i]) { |
| fPropSets[i]->compact(); |
| fPropSets8[i].init(fPropSets[i]); |
| } |
| } |
| |
| // Sets used while parsing rules, but not referenced from the parse state table |
| fRuleSets[kRuleSet_rule_char-128] = UnicodeSet(UnicodeString(TRUE, gRuleSet_rule_char_pattern, -1), *status); |
| fRuleSets[kRuleSet_digit_char-128] = UnicodeSet(UnicodeString(TRUE, gRuleSet_digit_char_pattern, -1), *status); |
| fRuleDigitsAlias = &fRuleSets[kRuleSet_digit_char-128]; |
| for (i=0; i<(int32_t)(sizeof(fRuleSets)/sizeof(fRuleSets[0])); i++) { |
| fRuleSets[i].compact(); |
| } |
| |
| // Finally, initialize an empty string for utility purposes |
| fEmptyText = utext_openUChars(NULL, NULL, 0, status); |
| |
| return; // If we reached this point, everything is fine so just exit |
| |
| ExitConstrDeleteAll: // Remove fPropSets and fRuleSets and return error |
| for (i=0; i<URX_LAST_SET; i++) { |
| delete fPropSets[i]; |
| fPropSets[i] = NULL; |
| } |
| *status = U_MEMORY_ALLOCATION_ERROR; |
| } |
| |
| |
| RegexStaticSets::~RegexStaticSets() { |
| int32_t i; |
| |
| for (i=0; i<URX_LAST_SET; i++) { |
| delete fPropSets[i]; |
| fPropSets[i] = NULL; |
| } |
| fRuleDigitsAlias = NULL; |
| |
| utext_close(fEmptyText); |
| } |
| |
| |
| //------------------------------------------------------------------------------ |
| // |
| // regex_cleanup Memory cleanup function, free/delete all |
| // cached memory. Called by ICU's u_cleanup() function. |
| // |
| //------------------------------------------------------------------------------ |
| UBool |
| RegexStaticSets::cleanup(void) { |
| delete RegexStaticSets::gStaticSets; |
| RegexStaticSets::gStaticSets = NULL; |
| return TRUE; |
| } |
| |
| U_CDECL_BEGIN |
| static UBool U_CALLCONV |
| regex_cleanup(void) { |
| return RegexStaticSets::cleanup(); |
| } |
| U_CDECL_END |
| |
| void RegexStaticSets::initGlobals(UErrorCode *status) { |
| RegexStaticSets *p; |
| UMTX_CHECK(NULL, gStaticSets, p); |
| if (p == NULL) { |
| p = new RegexStaticSets(status); |
| if (p == NULL) { |
| *status = U_MEMORY_ALLOCATION_ERROR; |
| return; |
| } |
| if (U_FAILURE(*status)) { |
| delete p; |
| return; |
| } |
| umtx_lock(NULL); |
| if (gStaticSets == NULL) { |
| gStaticSets = p; |
| p = NULL; |
| } |
| umtx_unlock(NULL); |
| if (p) { |
| delete p; |
| } |
| ucln_i18n_registerCleanup(UCLN_I18N_REGEX, regex_cleanup); |
| } |
| } |
| |
| |
| U_NAMESPACE_END |
| #endif // !UCONFIG_NO_REGULAR_EXPRESSIONS |
