atf-c++/detail/text.hpp

	text.hpp revision 4a53e3c2b83c476a93148eaee0272649beb221ca
// Copyright (c) 2007 The NetBSD Foundation, Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
// CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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#if !defined(ATF_CXX_DETAIL_TEXT_HPP)
#define ATF_CXX_DETAIL_TEXT_HPP

extern "C" {
#include <stdint.h>
}

#include <sstream>
#include <stdexcept>
#include <string>
#include <vector>

namespace atf {
namespace text {

//!
//! \brief Duplicates a C string using the new[] allocator.
//!
//! Replaces the functionality of strdup by using the new[] allocator and
//! thus allowing the resulting memory to be managed by utils::auto_array.
//!
char* duplicate(const char*);

//!
//! \brief Joins multiple words into a string.
//!
//! Joins a list of words into a string, separating them using the provided
//! separator.  Empty words are not omitted.
//!
template< class T >
std::string
join(const T& words, const std::string& separator)
{
    std::string str;

    typename T::const_iterator iter = words.begin();
    bool done = iter == words.end();
    while (!done) {
        str += *iter;
        iter++;
        if (iter != words.end())
            str += separator;
        else
            done = true;
    }

    return str;
}

//!
//! \brief Checks if the string matches a regular expression.
//!
bool match(const std::string&, const std::string&);

//!
//! \brief Splits a string into words.
//!
//! Splits the given string into multiple words, all separated by the
//! given delimiter.  Multiple occurrences of the same delimiter are
//! not condensed so that rejoining the words later on using the same
//! delimiter results in the original string.
//!
std::vector< std::string > split(const std::string&, const std::string&);

//!
//! \brief Removes whitespace from the beginning and end of a string.
//!
std::string trim(const std::string&);

//!
//! \brief Converts a string to a boolean value.
//!
bool to_bool(const std::string&);

//!
//! \brief Converts the given string to a bytes size.
//!
int64_t to_bytes(std::string);

//!
//! \brief Changes the case of a string to lowercase.
//!
//! Returns a new string that is a lowercased version of the original
//! one.
//!
std::string to_lower(const std::string&);

//!
//! \brief Converts the given object to a string.
//!
//! Returns a string with the representation of the given object.  There
//! must exist an operator<< method for that object.
//!
template< class T >
std::string
to_string(const T& ob)
{
    std::ostringstream ss;
    ss << ob;
    return ss.str();
}

//!
//! \brief Converts the given string to another type.
//!
//! Attempts to convert the given string to the requested type.  Throws
//! an exception if the conversion failed.
//!
template< class T >
T
to_type(const std::string& str)
{
    std::istringstream ss(str);
    T value;
    ss >> value;
    if (!ss.eof() || (ss.eof() && (ss.fail() || ss.bad())))
        throw std::runtime_error("Cannot convert string to requested type");
    return value;
}

} // namespace text
} // namespace atf

#endif // !defined(ATF_CXX_DETAIL_TEXT_HPP)