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add methods: try_esc_to_json(wchar_t val, stream) try_esc_to_xml(...) try_esc_to_csv(...)

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Those methods return true if the val character was escaped and put
to the out stream. If the character is invalid for such a stream
they only return true without putting it to the stream.
This commit is contained in:
Tomasz Sowa
2022-02-04 14:19:54 +01:00
parent 3b9b464bb7
commit ac3c59323b
2 changed files with 108 additions and 39 deletions
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144
src/convert/misc.cpp
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@@ -73,48 +73,70 @@ void esc_to_json_uformat(wchar_t val, Stream & out)
}
void esc_to_json(wchar_t val, Stream & out)
/*
* return true if the val character was escaped and put to the out stream
* if the character is invalid for such a stream then only return true
* but not put it to the stream
*/
bool try_esc_to_json(wchar_t val, Stream & out)
{
bool status = false;
if( val == '\r' )
{
out << '\\' << 'r';
status = true;
}
else
if( val == '\n' )
{
out << '\\' << 'n';
status = true;
}
else
if( val == '\t' )
{
out << '\\' << 't';
status = true;
}
else
if( val == 0x08 )
{
out << '\\' << 'b';
status = true;
}
else
if( val == 0x0c )
{
out << '\\' << 'f';
status = true;
}
else
if( val == '\\' )
{
out << '\\' << '\\';
status = true;
}
else
if( val == '"' )
{
out << '\\' << '\"';
status = true;
}
else
if( val < 32 )
{
esc_to_json_uformat(val, out);
status = true;
}
else
return status;
}
void esc_to_json(wchar_t val, Stream & out)
{
if( !try_esc_to_json(val, out) )
{
out << val;
}
@@ -123,7 +145,10 @@ void esc_to_json(wchar_t val, Stream & out)
void esc_to_json(char val, Stream & out)
{
esc_to_json((wchar_t)(unsigned char)val, out);
if( !try_esc_to_json((wchar_t)(unsigned char)val, out) )
{
out << val;
}
}
@@ -177,44 +202,66 @@ void esc_to_json(const std::wstring & in, Stream & out)
/*
* return true if the val character was escaped and put to the out stream
* if the character is invalid for such a stream then only return true
* but not put it to the stream
*/
bool try_esc_to_xml(wchar_t val, Stream & out)
{
bool status = false;
if( val == 0 )
{
// null character is invalid in XML 1.0 and 1.1
// https://en.wikipedia.org/wiki/Valid_characters_in_XML
// return true but not put the char to the out stream
status = true;
}
else
if( val == '<')
{
out << "&lt;";
status = true;
}
else
if( val == '>')
{
out << "&gt;";
status = true;
}
else
if( val == '&')
{
out << "&amp;";
status = true;
}
else
if( val == '"')
{
out << "&quot;";
status = true;
}
return status;
}
void esc_to_xml(wchar_t val, Stream & out)
{
switch(val)
if( !try_esc_to_xml(val, out) )
{
case 0:
// null character is invalid in XML 1.0 and 1.1
// https://en.wikipedia.org/wiki/Valid_characters_in_XML
break;
case '<':
out << "&lt;";
break;
case '>':
out << "&gt;";
break;
case '&':
out << "&amp;";
break;
case '"':
out << "&quot;";
break;
default:
out << val;
break;
}
}
void esc_to_xml(char val, Stream & out)
{
esc_to_xml((wchar_t)(unsigned char)val, out);
if( !try_esc_to_xml((wchar_t)(unsigned char)val, out) )
{
out << val;
}
}
@@ -269,28 +316,47 @@ void esc_to_xml(const std::wstring & in, Stream & out)
void esc_to_csv(wchar_t c, pt::Stream & out)
/*
* return true if the val character was escaped and put to the out stream
* if the character is invalid for such a stream then only return true
* but not put it to the stream
*/
bool try_esc_to_csv(wchar_t val, pt::Stream & out)
{
switch(c)
bool status = false;
if( val == 0 )
{
case 0:
// null characters are invalid in text files
break;
case '"':
// return true but not put to the out stream
status = true;
}
else
if( val == '"' )
{
out << "\"\"";
break;
status = true;
}
default:
out << c;
break;
return status;
}
void esc_to_csv(wchar_t val, pt::Stream & out)
{
if( !try_esc_to_csv(val, out) )
{
out << val;
}
}
void esc_to_csv(char val, Stream & out)
{
esc_to_csv((wchar_t)(unsigned char)val, out);
if( !try_esc_to_csv((wchar_t)(unsigned char)val, out) )
{
out << val;
}
}