match.cc

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/*
 * Copyright (c) 2019 The Regents of the University of California
 * Copyright (c) 2004-2005 The Regents of The University of Michigan
 * All rights reserved.
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 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "base/match.hh"
 
#include "base/str.hh"
 
using namespace std;
 
ObjectMatch::ObjectMatch()
{
}
 
ObjectMatch::ObjectMatch(const string &expr)
{
    setExpression(expr);
}
 
void
ObjectMatch::add(const ObjectMatch &other)
{
    tokens.insert(tokens.end(), other.tokens.begin(), other.tokens.end());
}
 
void
ObjectMatch::setExpression(const string &expr)
{
    tokens.resize(1);
    tokenize(tokens[0], expr, '.');
}
 
void
ObjectMatch::setExpression(const vector<string> &expr)
{
    if (expr.empty()) {
        tokens.resize(0);
    } else {
        tokens.resize(expr.size());
        for (vector<string>::size_type i = 0; i < expr.size(); ++i)
            tokenize(tokens[i], expr[i], '.');
    }
}
 
bool
ObjectMatch::domatch(const string &name) const
{
    vector<string> name_tokens;
    tokenize(name_tokens, name, '.');
    int ntsize = name_tokens.size();
 
    int num_expr = tokens.size();
    for (int i = 0; i < num_expr; ++i) {
        const vector<string> &token = tokens[i];
        int jstop = token.size();
 
        bool match = true;
        for (int j = 0; j < jstop; ++j) {
            if (j >= ntsize)
                break;
 
            const string &var = token[j];
            if (var != "*" && var != name_tokens[j]) {
                match = false;
                break;
            }
        }
 
        if (match)
            return true;
    }
 
    return false;
}
 
std::vector<std::vector<std::string> >
ObjectMatch::getExpressions()
{
    std::vector<std::vector<std::string> > to_return;
    for (const auto &expression: tokens) {
        std::vector<std::string> to_add;
        to_add.insert(to_add.end(), expression.begin(), expression.end());
        to_return.push_back(to_add);
    }
 
    return to_return;
}