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move get_std_regex_str to str_util

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This commit is contained in:
Murphy Berzish 2016-10-29 12:19:24 -04:00
parent ef0f6f1de3
commit 452eed6626
4 changed files with 46 additions and 45 deletions
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43
src/ast/str_decl_plugin.cpp
View file

@ -331,3 +331,46 @@ str_util::str_util(ast_manager &m) :
m_plugin = static_cast<str_decl_plugin*>(m.get_plugin(m.mk_family_id(symbol("str"))));
m_fid = m_plugin->get_family_id();
}
static std::string str2RegexStr(std::string str) {
std::string res = "";
int len = str.size();
for (int i = 0; i < len; i++) {
char nc = str[i];
// 12 special chars
if (nc == '\\' || nc == '^' || nc == '$' || nc == '.' || nc == '|' || nc == '?'
|| nc == '*' || nc == '+' || nc == '(' || nc == ')' || nc == '[' || nc == '{') {
res.append(1, '\\');
}
res.append(1, str[i]);
}
return res;
}
std::string str_util::get_std_regex_str(expr * regex) {
app * a_regex = to_app(regex);
if (is_re_Str2Reg(a_regex)) {
expr * regAst = a_regex->get_arg(0);
std::string regStr = str2RegexStr(get_string_constant_value(regAst));
return regStr;
} else if (is_re_RegexConcat(a_regex)) {
expr * reg1Ast = a_regex->get_arg(0);
expr * reg2Ast = a_regex->get_arg(1);
std::string reg1Str = get_std_regex_str(reg1Ast);
std::string reg2Str = get_std_regex_str(reg2Ast);
return "(" + reg1Str + ")(" + reg2Str + ")";
} else if (is_re_RegexUnion(a_regex)) {
expr * reg1Ast = a_regex->get_arg(0);
expr * reg2Ast = a_regex->get_arg(1);
std::string reg1Str = get_std_regex_str(reg1Ast);
std::string reg2Str = get_std_regex_str(reg2Ast);
return "(" + reg1Str + ")|(" + reg2Str + ")";
} else if (is_re_RegexStar(a_regex)) {
expr * reg1Ast = a_regex->get_arg(0);
std::string reg1Str = get_std_regex_str(reg1Ast);
return "(" + reg1Str + ")*";
} else {
TRACE("t_str", tout << "BUG: unrecognized regex term " << mk_pp(regex, get_manager()) << std::endl;);
UNREACHABLE(); return "";
}
}

2
src/ast/str_decl_plugin.h
View file

@ -182,6 +182,8 @@ public:
return m_manager.mk_app(get_fid(), OP_RE_REGEXSTAR, 1, es);
}
std::string get_std_regex_str(expr * regex);
};
#endif /* _STR_DECL_PLUGIN_H_ */