diff options
| author | Tianyi Liang <tianyi-liang@uiowa.edu> | 2014-04-24 17:30:15 -0500 |
|---|---|---|
| committer | Tianyi Liang <tianyi-liang@uiowa.edu> | 2014-04-24 17:30:15 -0500 |
| commit | 698f5a09b1c0177abfd2eaa2b110de100fd108ef (patch) | |
| tree | e7d7584e67621f48a45b33ed4fc2eea5a5a70f33 /src/util/regexp.cpp | |
| parent | 9a4df62fbb05a09c95877b53053ff2e231ae254c (diff) | |
minor change: add a heuristic for preventing constant splitting.
Diffstat (limited to 'src/util/regexp.cpp')
| -rw-r--r-- | src/util/regexp.cpp | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/util/regexp.cpp b/src/util/regexp.cpp index b6db624d5..3bc17b050 100644 --- a/src/util/regexp.cpp +++ b/src/util/regexp.cpp @@ -23,6 +23,71 @@ using namespace std; namespace CVC4 {
+void String::toInternal(const std::string &s) {
+ d_str.clear();
+ unsigned i=0;
+ while(i < s.size()) {
+ if(s[i] == '\\') {
+ i++;
+ if(i < s.size()) {
+ switch(s[i]) {
+ case 'n': {d_str.push_back( convertCharToUnsignedInt('\n') );i++;} break;
+ case 't': {d_str.push_back( convertCharToUnsignedInt('\t') );i++;} break;
+ case 'v': {d_str.push_back( convertCharToUnsignedInt('\v') );i++;} break;
+ case 'b': {d_str.push_back( convertCharToUnsignedInt('\b') );i++;} break;
+ case 'r': {d_str.push_back( convertCharToUnsignedInt('\r') );i++;} break;
+ case 'f': {d_str.push_back( convertCharToUnsignedInt('\f') );i++;} break;
+ case 'a': {d_str.push_back( convertCharToUnsignedInt('\a') );i++;} break;
+ case '\\': {d_str.push_back( convertCharToUnsignedInt('\\') );i++;} break;
+ case 'x': {
+ if(i + 2 < s.size()) {
+ if((isdigit(s[i+1]) || (s[i+1] >= 'a' && s[i+1] >= 'f') || (s[i+1] >= 'A' && s[i+1] >= 'F')) &&
+ (isdigit(s[i+2]) || (s[i+2] >= 'a' && s[i+2] >= 'f') || (s[i+2] >= 'A' && s[i+2] >= 'F'))) {
+ d_str.push_back( convertCharToUnsignedInt( hexToDec(s[i+1]) * 16 + hexToDec(s[i+2]) ) );
+ i += 3;
+ } else {
+ throw CVC4::Exception( "Error String Literal: \"" + s + "\"" );
+ }
+ } else {
+ throw CVC4::Exception( "Error String Literal: \"" + s + "\"" );
+ }
+ }
+ break;
+ default: {
+ if(isdigit(s[i])) {
+ int num = (int)s[i] - (int)'0';
+ bool flag = num < 4;
+ if(i+1 < s.size() && num < 8 && isdigit(s[i+1]) && s[i+1] < '8') {
+ num = num * 8 + (int)s[i+1] - (int)'0';
+ if(flag && i+2 < s.size() && isdigit(s[i+2]) && s[i+2] < '8') {
+ num = num * 8 + (int)s[i+2] - (int)'0';
+ d_str.push_back( convertCharToUnsignedInt((char)num) );
+ i += 3;
+ } else {
+ d_str.push_back( convertCharToUnsignedInt((char)num) );
+ i += 2;
+ }
+ } else {
+ d_str.push_back( convertCharToUnsignedInt((char)num) );
+ i++;
+ }
+ } else {
+ d_str.push_back( convertCharToUnsignedInt(s[i]) );
+ i++;
+ }
+ }
+ }
+ } else {
+ throw CVC4::Exception( "should be handled by lexer: \"" + s + "\"" );
+ //d_str.push_back( convertCharToUnsignedInt('\\') );
+ }
+ } else {
+ d_str.push_back( convertCharToUnsignedInt(s[i]) );
+ i++;
+ }
+ }
+}
+
void String::getCharSet(std::set<unsigned int> &cset) const {
for(std::vector<unsigned int>::const_iterator itr = d_str.begin();
itr != d_str.end(); itr++) {
@@ -30,6 +95,21 @@ void String::getCharSet(std::set<unsigned int> &cset) const { }
}
+bool String::overlap(String &y) const {
+ unsigned n = y.size();
+ if(d_str.size() < y.size()) {
+ n = d_str.size();
+ }
+ for(unsigned i=1; i<n; i++) {
+ String s = suffix(i);
+ String p = y.prefix(i);
+ if(s == p) {
+ return true;
+ }
+ }
+ return false;
+}
+
std::string String::toString() const {
std::string str;
for(unsigned int i=0; i<d_str.size(); ++i) {
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