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/********************* */
/*! \file regexp.cpp
** \verbatim
** Top contributors (to current version):
** Morgan Deters, Tianyi Liang, Andrew Reynolds
** This file is part of the CVC4 project.
** Copyright (c) 2009-2017 by the authors listed in the file AUTHORS
** in the top-level source directory) and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief [[ Add one-line brief description here ]]
**
** [[ Add lengthier description here ]]
** \todo document this file
**/
#include "util/regexp.h"
#include <iomanip>
#include <iostream>
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(isxdigit(s[i+1]) && isxdigit(s[i+2])) {
d_str.push_back( convertCharToUnsignedInt( hexToDec(s[i+1]) * 16 + hexToDec(s[i+2]) ) );
i += 3;
} else {
throw CVC4::Exception( "Illegal String Literal: \"" + s + "\"" );
}
} else {
throw CVC4::Exception( "Illegal String Literal: \"" + s + "\", must have two digits after \\x" );
}
}
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((unsigned char)num) );
i += 3;
} else {
d_str.push_back( convertCharToUnsignedInt((unsigned char)num) );
i += 2;
}
} else {
d_str.push_back( convertCharToUnsignedInt((unsigned char)num) );
i++;
}
} else if((unsigned)s[i] > 127) {
throw CVC4::Exception( "Illegal String Literal: \"" + s + "\", must use escaped sequence" );
} 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 if((unsigned)s[i] > 127) {
throw CVC4::Exception( "Illegal String Literal: \"" + s + "\", must use escaped sequence" );
} else {
d_str.push_back( convertCharToUnsignedInt(s[i]) );
i++;
}
}
}
void String::getCharSet(std::set<unsigned char> &cset) const {
for(std::vector<unsigned int>::const_iterator itr = d_str.begin();
itr != d_str.end(); itr++) {
cset.insert( convertUnsignedIntToChar(*itr) );
}
}
std::size_t String::overlap(String &y) const {
std::size_t i = d_str.size() < y.size() ? d_str.size() : y.size();
for(; i>0; i--) {
String s = suffix(i);
String p = y.prefix(i);
if(s == p) {
return i;
}
}
return i;
}
std::size_t String::roverlap(String &y) const {
std::size_t i = d_str.size() < y.size() ? d_str.size() : y.size();
for(; i>0; i--) {
String s = prefix(i);
String p = y.suffix(i);
if(s == p) {
return i;
}
}
return i;
}
std::string String::toString() const {
std::string str;
for(unsigned int i=0; i<d_str.size(); ++i) {
unsigned char c = convertUnsignedIntToChar( d_str[i] );
if(isprint( c )) {
if(c == '\\') {
str += "\\\\";
}
//else if(c == '\"') {
// str += "\\\"";
//}
else {
str += c;
}
} else {
std::string s;
switch(c) {
case '\a': s = "\\a"; break;
case '\b': s = "\\b"; break;
case '\t': s = "\\t"; break;
case '\r': s = "\\r"; break;
case '\v': s = "\\v"; break;
case '\f': s = "\\f"; break;
case '\n': s = "\\n"; break;
case '\e': s = "\\e"; break;
default : {
std::stringstream ss;
ss << std::setfill ('0') << std::setw(2) << std::hex << ((int)c);
std::string t = ss.str();
t = t.substr(t.size()-2, 2);
s = "\\x" + t;
//std::string s2 = static_cast<std::ostringstream*>( &(std::ostringstream() << (int)c) )->str();
}
}
str += s;
}
}
return str;
}
std::ostream& operator <<(std::ostream& os, const String& s) {
return os << "\"" << s.toString() << "\"";
}
std::ostream& operator<<(std::ostream& out, const RegExp& s) {
return out << "regexp(" << s.getType() << ')';
}
}/* CVC4 namespace */
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