+//------------------------------------------------------------------------------
+//
+// caseInsensitiveStart given a single code point from a pattern string, determine the
+// set of characters that could potentially begin a case-insensitive
+// match of a string beginning with that character, using full Unicode
+// case insensitive matching.
+//
+// This is used in optimizing find().
+//
+// closeOver(USET_CASE_INSENSITIVE) does most of what is needed, but
+// misses cases like this:
+// A string from the pattern begins with 'ss' (although all we know
+// in this context is that it begins with 's')
+// The pattern could match a string beginning with a German sharp-s
+//
+// To the ordinary case closure for a character c, we add all other
+// characters cx where the case closure of cx incudes a string form that begins
+// with the original character c.
+//
+// This function could be made smarter. The full pattern string is available
+// and it would be possible to verify that the extra characters being added
+// to the starting set fully match, rather than having just a first-char of the
+// folded form match.
+//
+//------------------------------------------------------------------------------
+void RegexCompile::findCaseInsensitiveStarters(UChar32 c, UnicodeSet *starterChars) {
+
+// Machine Generated below.
+// It may need updating with new versions of Unicode.
+// Intltest test RegexTest::TestCaseInsensitiveStarters will fail if an update is needed.
+// The update tool is here: svn+ssh://source.icu-project.org/repos/icu/tools/trunk/unicode/c/genregexcasing
+
+// Machine Generated Data. Do not hand edit.
+ static const UChar32 RECaseFixCodePoints[] = {
+ 0x61, 0x66, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x77, 0x79, 0x2bc,
+ 0x3ac, 0x3ae, 0x3b1, 0x3b7, 0x3b9, 0x3c1, 0x3c5, 0x3c9, 0x3ce, 0x565,
+ 0x574, 0x57e, 0x1f00, 0x1f01, 0x1f02, 0x1f03, 0x1f04, 0x1f05, 0x1f06, 0x1f07,
+ 0x1f20, 0x1f21, 0x1f22, 0x1f23, 0x1f24, 0x1f25, 0x1f26, 0x1f27, 0x1f60, 0x1f61,
+ 0x1f62, 0x1f63, 0x1f64, 0x1f65, 0x1f66, 0x1f67, 0x1f70, 0x1f74, 0x1f7c, 0x110000};
+
+ static const int16_t RECaseFixStringOffsets[] = {
+ 0x0, 0x1, 0x6, 0x7, 0x8, 0x9, 0xd, 0xe, 0xf, 0x10,
+ 0x11, 0x12, 0x13, 0x17, 0x1b, 0x20, 0x21, 0x2a, 0x2e, 0x2f,
+ 0x30, 0x34, 0x35, 0x37, 0x39, 0x3b, 0x3d, 0x3f, 0x41, 0x43,
+ 0x45, 0x47, 0x49, 0x4b, 0x4d, 0x4f, 0x51, 0x53, 0x55, 0x57,
+ 0x59, 0x5b, 0x5d, 0x5f, 0x61, 0x63, 0x65, 0x66, 0x67, 0};
+
+ static const int16_t RECaseFixCounts[] = {
+ 0x1, 0x5, 0x1, 0x1, 0x1, 0x4, 0x1, 0x1, 0x1, 0x1,
+ 0x1, 0x1, 0x4, 0x4, 0x5, 0x1, 0x9, 0x4, 0x1, 0x1,
+ 0x4, 0x1, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2,
+ 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2,
+ 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0};
+
+ static const UChar RECaseFixData[] = {
+ 0x1e9a, 0xfb00, 0xfb01, 0xfb02, 0xfb03, 0xfb04, 0x1e96, 0x130, 0x1f0, 0xdf,
+ 0x1e9e, 0xfb05, 0xfb06, 0x1e97, 0x1e98, 0x1e99, 0x149, 0x1fb4, 0x1fc4, 0x1fb3,
+ 0x1fb6, 0x1fb7, 0x1fbc, 0x1fc3, 0x1fc6, 0x1fc7, 0x1fcc, 0x390, 0x1fd2, 0x1fd3,
+ 0x1fd6, 0x1fd7, 0x1fe4, 0x3b0, 0x1f50, 0x1f52, 0x1f54, 0x1f56, 0x1fe2, 0x1fe3,
+ 0x1fe6, 0x1fe7, 0x1ff3, 0x1ff6, 0x1ff7, 0x1ffc, 0x1ff4, 0x587, 0xfb13, 0xfb14,
+ 0xfb15, 0xfb17, 0xfb16, 0x1f80, 0x1f88, 0x1f81, 0x1f89, 0x1f82, 0x1f8a, 0x1f83,
+ 0x1f8b, 0x1f84, 0x1f8c, 0x1f85, 0x1f8d, 0x1f86, 0x1f8e, 0x1f87, 0x1f8f, 0x1f90,
+ 0x1f98, 0x1f91, 0x1f99, 0x1f92, 0x1f9a, 0x1f93, 0x1f9b, 0x1f94, 0x1f9c, 0x1f95,
+ 0x1f9d, 0x1f96, 0x1f9e, 0x1f97, 0x1f9f, 0x1fa0, 0x1fa8, 0x1fa1, 0x1fa9, 0x1fa2,
+ 0x1faa, 0x1fa3, 0x1fab, 0x1fa4, 0x1fac, 0x1fa5, 0x1fad, 0x1fa6, 0x1fae, 0x1fa7,
+ 0x1faf, 0x1fb2, 0x1fc2, 0x1ff2, 0};
+
+// End of machine generated data.
+
+ if (u_hasBinaryProperty(c, UCHAR_CASE_SENSITIVE)) {
+ UChar32 caseFoldedC = u_foldCase(c, U_FOLD_CASE_DEFAULT);
+ starterChars->set(caseFoldedC, caseFoldedC);
+
+ int32_t i;
+ for (i=0; RECaseFixCodePoints[i]<c ; i++) {
+ // Simple linear search through the sorted list of interesting code points.
+ }
+
+ if (RECaseFixCodePoints[i] == c) {
+ int32_t dataIndex = RECaseFixStringOffsets[i];
+ int32_t numCharsToAdd = RECaseFixCounts[i];
+ UChar32 cpToAdd = 0;
+ for (int32_t j=0; j<numCharsToAdd; j++) {
+ U16_NEXT_UNSAFE(RECaseFixData, dataIndex, cpToAdd);
+ starterChars->add(cpToAdd);
+ }
+ }
+
+ starterChars->closeOver(USET_CASE_INSENSITIVE);
+ starterChars->removeAllStrings();
+ } else {
+ // Not a cased character. Just return it alone.
+ starterChars->set(c, c);
+ }
+}
+
+
+
+
projects / apple / icu.git / blobdiff