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/*
* Copyright (c) 2015-2020, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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 IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef STRING_UTIL_H
#define STRING_UTIL_H
#include "ue2common.h"
#include <iomanip>
#include <string>
#include <sstream>
#include <vector>
#include <cstring>
#include <iostream>
//
// Utility functions
//
// read a string in and convert it to another type, anything supported
// by stringstream
template<typename T>
inline bool fromString(const std::string &s, T& val)
{
std::istringstream i(s);
char c;
if (!(i >> val) || i.get(c)) {
return false;
}
return true;
}
// read in a comma-separated or hyphen-connected set of values: very simple
// impl, not for external consumption
template<typename T>
inline bool strToList(const std::string &s, std::vector<T>& out)
{
std::istringstream i(s);
char c;
do {
T val;
if (!(i >> val)) {
break;
}
out.push_back(val);
i.get(c);
if (c == '-') {
T val_end;
i >> val_end;
while (val < val_end) {
out.push_back(++val);
}
break;
}
} while (c == ',');
return !out.empty();
}
// return a nicely escaped version of a string: this should probably become
// an IO manipulator or something
UNUSED static
const std::string printable(const std::string &in) {
std::ostringstream oss;
for (size_t i = 0; i < in.size(); ++i) {
unsigned char c = in[i];
if (c == '\"') {
oss << "\\\"";
} else if (c == '\n') {
oss << "\\n";
} else if (c == '\t') {
oss << "\\t";
} else if (c == '\r') {
oss << "\\r";
} else if (0x20 <= c && c <= 0x7e && c != '\\') {
oss << c;
} else {
oss << "\\x"
<< std::hex << std::setw(2) << std::setfill('0')
<< (unsigned)(in[i] & 0xff)
<< std::dec;
}
}
return oss.str();
}
template<typename it_t>
void prettyPrintRange(std::ostream &out, it_t begin, it_t end) {
bool in_range = false;
it_t it = begin;
it_t itp = it;
for (; it != end; itp = it++) {
if (it != begin && *it == *itp + 1) {
in_range = true;
continue;
} else if (it != begin) {
if (in_range) {
out << "-" << *itp;
}
out << ", ";
in_range = false;
}
out << *it;
}
if (in_range) {
out << "-" << *itp;
}
}
// Transfer given string into a hex-escaped pattern.
static really_inline
char *makeHex(const unsigned char *pat, unsigned patlen) {
size_t hexlen = patlen * 4;
char *hexbuf = (char *)malloc(hexlen + 1);
unsigned i;
char *buf;
for (i = 0, buf = hexbuf; i < patlen; i++, buf += 4) {
snprintf(buf, 5, "\\x%02x", (unsigned char)pat[i]);
}
hexbuf[hexlen] = '\0';
return hexbuf;
}
#endif // STRING_UTIL_H
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