forked from lthn/blockchain
335 lines
No EOL
11 KiB
C++
335 lines
No EOL
11 KiB
C++
// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
|
|
// All rights reserved.
|
|
//
|
|
// 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 the Andrey N. Sabelnikov 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 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.
|
|
//
|
|
#pragma once
|
|
#include <algorithm>
|
|
|
|
namespace epee
|
|
{
|
|
namespace misc_utils
|
|
{
|
|
namespace parse
|
|
{
|
|
inline std::string transform_to_escape_sequence(const std::string& src)
|
|
{
|
|
//std::stringstream res;
|
|
std::string res;
|
|
for(std::string::const_iterator it = src.begin(); it!=src.end(); ++it)
|
|
{
|
|
switch(*it)
|
|
{
|
|
case '\b': //Backspace (ascii code 08)
|
|
res+="\\b"; break;
|
|
case '\f': //Form feed (ascii code 0C)
|
|
res+="\\f"; break;
|
|
case '\n': //New line
|
|
res+="\\n"; break;
|
|
case '\r': //Carriage return
|
|
res+="\\r"; break;
|
|
case '\t': //Tab
|
|
res+="\\t"; break;
|
|
case '\v': //Vertical tab
|
|
res+="\\v"; break;
|
|
//case '\'': //Apostrophe or single quote
|
|
// res+="\\'"; break;
|
|
case '"': //Double quote
|
|
res+="\\\""; break;
|
|
case '\\': //Backslash caracter
|
|
res+="\\\\"; break;
|
|
case '/': //Backslash caracter
|
|
res+="\\/"; break;
|
|
default:
|
|
res.push_back(*it);
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/* Escapes JSON control characters and ASCII control characters (00h-1Fh => \u00XX) according to JSON reference.
|
|
UTF-8-safe.
|
|
from https://www.json.org/ :
|
|
char -- any-Unicode-character-except-"-or-\-or-control-character: \" \\ \/ \b \f \n \r \t \uDDDD
|
|
*/
|
|
inline std::string transform_to_json_escape_sequence(const std::string& str)
|
|
{
|
|
std::string result;
|
|
|
|
static const char hex_map[17] = "0123456789abcdef";
|
|
static const std::string su00 = "\\u00";
|
|
|
|
const char* c_str = str.c_str();
|
|
for(size_t i = 0, len = str.length(); i < len; ++i)
|
|
{
|
|
char c = c_str[i];
|
|
switch(c)
|
|
{
|
|
case '\b': // ASCII 08h
|
|
result += "\\b";
|
|
break;
|
|
case '\t': // ASCII 09h
|
|
result += "\\t";
|
|
break;
|
|
case '\n': // ASCII 0Ah
|
|
result += "\\n";
|
|
break;
|
|
case '\f': // ASCII 0Ch
|
|
result += "\\f";
|
|
break;
|
|
case '\r': // ASCII 0Dh
|
|
result += "\\r";
|
|
break;
|
|
case '"': // ASCII 22h
|
|
case '\\': // ASCII 5Ch
|
|
case '/': // ASCII 2Fh
|
|
result.push_back('\\');
|
|
result.push_back(c);
|
|
break;
|
|
|
|
default:
|
|
if (static_cast<unsigned char>(c) < 0x20)
|
|
result += su00 + hex_map[(c >> 4) & 0xf] + hex_map[c & 0xf]; // encode all other control characters as \uDDDD
|
|
else
|
|
result.push_back(c);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
|
|
\b Backspace (ascii code 08)
|
|
\f Form feed (ascii code 0C)
|
|
\n New line
|
|
\r Carriage return
|
|
\t Tab
|
|
\v Vertical tab
|
|
\' Apostrophe or single quote
|
|
\" Double quote
|
|
\\ Backslash character
|
|
\u00XY ASCII character with code 0xXY
|
|
|
|
*/
|
|
inline void match_string2(std::string::const_iterator& star_end_string, std::string::const_iterator buf_end, std::string& val)
|
|
{
|
|
val.clear();
|
|
bool escape_mode = false;
|
|
val.reserve(buf_end - star_end_string);
|
|
std::string::const_iterator it = star_end_string;
|
|
++it;
|
|
for(;it != buf_end;it++)
|
|
{
|
|
if(escape_mode/*prev_ch == '\\'*/)
|
|
{
|
|
switch(*it)
|
|
{
|
|
case 'b': //Backspace (ascii code 08)
|
|
val.push_back(0x08);break;
|
|
case 'f': //Form feed (ascii code 0C)
|
|
val.push_back(0x0C);break;
|
|
case 'n': //New line
|
|
val.push_back('\n');break;
|
|
case 'r': //Carriage return
|
|
val.push_back('\r');break;
|
|
case 't': //Tab
|
|
val.push_back('\t');break;
|
|
case 'v': //Vertical tab
|
|
val.push_back('\v');break;
|
|
case '\'': //Apostrophe or single quote
|
|
val.push_back('\'');break;
|
|
case '"': //Double quote
|
|
val.push_back('"');break;
|
|
case '\\': //Backslash character
|
|
val.push_back('\\');break;
|
|
case '/': //Slash character
|
|
val.push_back('/');break;
|
|
case 'u': // \uDDDD sequence
|
|
{
|
|
bool ok = false;
|
|
size_t chars_left = buf_end - it - 1;
|
|
size_t chars_to_get = std::min(static_cast<size_t>(4), chars_left); // in [0, 4]
|
|
char tmp[10] = {0};
|
|
memcpy(tmp, &(*(it+1)), chars_to_get);
|
|
it = it + chars_to_get; // move forward to skip 0..4 digits
|
|
if (chars_to_get == 4)
|
|
{
|
|
char *p_last_decoded_char = nullptr;
|
|
unsigned long value = strtoul(tmp, &p_last_decoded_char, 16); // expected value is from 0x0000 (\u0000) to 0x00ff (\u00ff)
|
|
if (value <= 0xff && p_last_decoded_char - tmp == 4)
|
|
{
|
|
val.push_back(static_cast<char>(value));
|
|
ok = true;
|
|
}
|
|
}
|
|
if (!ok)
|
|
{
|
|
LOG_PRINT_L0("JSON invalid escape sequence: \\u" << tmp);
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
val.push_back(*it);
|
|
LOG_PRINT_L0("JSON unknown escape sequence :\"\\" << *it << "\"");
|
|
}
|
|
escape_mode = false;
|
|
}else if(*it == '"')
|
|
{
|
|
star_end_string = it;
|
|
return;
|
|
}else if(*it == '\\')
|
|
{
|
|
escape_mode = true;
|
|
}
|
|
else
|
|
{
|
|
val.push_back(*it);
|
|
}
|
|
}
|
|
ASSERT_MES_AND_THROW("Failed to match string in json entry: " << std::string(star_end_string, buf_end));
|
|
}
|
|
inline bool match_string(std::string::const_iterator& star_end_string, std::string::const_iterator buf_end, std::string& val)
|
|
{
|
|
try
|
|
{
|
|
|
|
match_string2(star_end_string, buf_end, val);
|
|
return true;
|
|
}
|
|
catch(...)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
inline void match_number2(std::string::const_iterator& star_end_string, std::string::const_iterator buf_end, std::string& val, bool& is_float_val, bool& is_signed_val)
|
|
{
|
|
val.clear();
|
|
is_float_val = false;
|
|
for(std::string::const_iterator it = star_end_string;it != buf_end;it++)
|
|
{
|
|
if(isdigit(*it) || (it == star_end_string && *it == '-') || (val.size() && *it == '.' ) || (is_float_val && (*it == 'e' || *it == 'E' || *it == '-' || *it == '+' )) )
|
|
{
|
|
if(!val.size() && *it == '-')
|
|
is_signed_val = true;
|
|
if(*it == '.' )
|
|
is_float_val = true;
|
|
val.push_back(*it);
|
|
}
|
|
else
|
|
{
|
|
if(val.size())
|
|
{
|
|
star_end_string = --it;
|
|
return;
|
|
}
|
|
else
|
|
ASSERT_MES_AND_THROW("wrong number in json entry: " << std::string(star_end_string, buf_end));
|
|
}
|
|
}
|
|
ASSERT_MES_AND_THROW("wrong number in json entry: " << std::string(star_end_string, buf_end));
|
|
}
|
|
inline bool match_number(std::string::const_iterator& star_end_string, std::string::const_iterator buf_end, std::string& val)
|
|
{
|
|
try
|
|
{
|
|
bool is_v_float = false;bool is_signed_val = false;
|
|
match_number2(star_end_string, buf_end, val, is_v_float, is_signed_val);
|
|
return !is_v_float;
|
|
}
|
|
catch(...)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
inline void match_word2(std::string::const_iterator& star_end_string, std::string::const_iterator buf_end, std::string& val)
|
|
{
|
|
val.clear();
|
|
|
|
for(std::string::const_iterator it = star_end_string;it != buf_end;it++)
|
|
{
|
|
if(!isalpha(*it))
|
|
{
|
|
val.assign(star_end_string, it);
|
|
if(val.size())
|
|
{
|
|
star_end_string = --it;
|
|
return;
|
|
}else
|
|
ASSERT_MES_AND_THROW("failed to match word number in json entry: " << std::string(star_end_string, buf_end));
|
|
}
|
|
}
|
|
ASSERT_MES_AND_THROW("failed to match word number in json entry: " << std::string(star_end_string, buf_end));
|
|
}
|
|
inline bool match_word(std::string::const_iterator& star_end_string, std::string::const_iterator buf_end, std::string& val)
|
|
{
|
|
try
|
|
{
|
|
match_word2(star_end_string, buf_end, val);
|
|
return true;
|
|
}
|
|
catch(...)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
inline bool match_word_with_extrasymb(std::string::const_iterator& star_end_string, std::string::const_iterator buf_end, std::string& val)
|
|
{
|
|
val.clear();
|
|
|
|
for(std::string::const_iterator it = star_end_string;it != buf_end;it++)
|
|
{
|
|
if(!isalnum(*it) && *it != '-' && *it != '_')
|
|
{
|
|
val.assign(star_end_string, it);
|
|
if(val.size())
|
|
{
|
|
star_end_string = --it;
|
|
return true;
|
|
}else
|
|
return false;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
inline bool match_word_til_equal_mark(std::string::const_iterator& star_end_string, std::string::const_iterator buf_end, std::string::const_iterator& word_end)
|
|
{
|
|
word_end = star_end_string;
|
|
|
|
for(std::string::const_iterator it = star_end_string;it != buf_end;it++)
|
|
{
|
|
if(isspace(*it))
|
|
{
|
|
|
|
continue;
|
|
}else if( *it == '=' )
|
|
{
|
|
star_end_string = it;
|
|
word_end = it;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
} |