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one/include/NebulaUtil.h
2015-02-24 12:27:59 +01:00

173 lines
5.2 KiB
C++

/* -------------------------------------------------------------------------- */
/* Copyright 2002-2015, OpenNebula Project (OpenNebula.org), C12G Labs */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
/* not use this file except in compliance with the License. You may obtain */
/* a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
/* See the License for the specific language governing permissions and */
/* limitations under the License. */
/* -------------------------------------------------------------------------- */
#ifndef _NEBULA_UTIL_H_
#define _NEBULA_UTIL_H_
#include <string>
#include <sstream>
#include <vector>
#include <set>
namespace one_util
{
std::string& toupper(std::string& st);
std::string& tolower(std::string& st);
std::string log_time(time_t the_time);
std::string log_time();
/**
* sha1 digest
* @param in the string to be hashed
* @return sha1 hash of str
*/
std::string sha1_digest(const std::string& in);
/**
* Base 64 encoding
* @param in the string to encoded
* @return a pointer to the encoded string (must be freed) or 0 in case of
* error
*/
std::string * base64_encode(const std::string& in);
/**
* Base 64 decoding
* @param in the string to decode
* @return a pointer to the decoded string (must be freed) or 0 in case of
* error
*/
std::string * base64_decode(const std::string& in);
/**
* AES256 encryption
* @param in the string to encrypt
* @param password to encrypt data
* @return a pointer to the encrypted string (must be freed) or 0 in case of
* error
*/
std::string * aes256cbc_encrypt(const std::string& in, const std::string password);
/**
* Creates a random number, using time(0) as seed, and performs an sha1 hash
* @return a new random password
*/
std::string random_password();
/**
* Splits a string, using the given delimiter
*
* @param st string to split
* @param delim delimiter character
* @param clean_empty true to clean empty split parts.
* Example for st "a::b:c"
* clean_empty true will return ["a", "b", "c"]
* clean_empty fase will return ["a", "", "b", "c"]
*
* @return a vector containing the resulting substrings
*/
std::vector<std::string> split(
const std::string& st,
char delim,
bool clean_empty=true);
/**
* Splits a string, using the given delimiter
*
* @param st string to split
* @param delim delimiter character
* @param result where the result will be saved
* @param clean_empty true to clean empty split parts.
* Example for st "a::b:c"
* clean_empty true will return ["a", "b", "c"]
* clean_empty fase will return ["a", "", "b", "c"]
*/
template <class T>
void split_unique(
const std::string& st,
char delim,
std::set<T>& result,
bool clean_empty=true)
{
T elem;
std::vector<std::string>::const_iterator it;
std::vector<std::string> strings = split(st, delim, clean_empty);
for (it = strings.begin(); it != strings.end(); it++)
{
std::istringstream iss(*it);
iss >> elem;
if ( iss.fail() )
{
continue;
}
result.insert(elem);
}
}
/**
* Joins the given element with the delimiter
*
* @param first iterator
* @param last iterator
* @param delim delimiter character
* @return the joined strings
*/
template <class Iterator>
std::string join(Iterator first, Iterator last, char delim)
{
std::ostringstream oss;
for(Iterator it = first; it != last; it++)
{
if (it != first)
{
oss << delim;
}
oss << *it;
}
return oss.str();
}
/**
* Creates a string from the given float, using fixed notation. If the
* number has any decimals, they will be truncated to 2.
*
* @param num
* @return
*/
std::string float_to_str(const float &num);
/**
* Checks if a strings matches a regular expression
*
* @param pattern PCRE extended pattern
* @param subject the string to test
* @return 0 on match, another value otherwise
*/
int regex_match(const char *pattern, const char *subject);
};
#endif /* _NEBULA_UTIL_H_ */