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Escape the empty indicator in logs if it occurs literally as a field's

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actual content.

Addresses BIT-931.
This commit is contained in:
Robin Sommer 2016-07-05 16:34:24 -07:00
parent 9360112e8a
commit 721693425f
3 changed files with 55 additions and 15 deletions
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36
src/threading/formatters/Ascii.cc
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@ -9,6 +9,22 @@
using namespace threading::formatter;
// If the value we'd write out would match exactly the a reserved string, we
// escape the first character so that the output won't be ambigious. If this
// function returns true, it has added an escaped version of data to desc.
static inline bool escapeReservedContent(ODesc* desc, const string& reserved, const char* data, int size)
{
if ( size != (int)reserved.size() || memcmp(data, reserved.data(), size) != 0 )
return false;
char hex[4] = {'\\', 'x', '0', '0'};
bytetohex(*data, hex + 2);
desc->AddRaw(hex, 4);
desc->AddN(data + 1, size - 1);
return true;
}
Ascii::SeparatorInfo::SeparatorInfo()
{
separator = "SHOULD_NOT_BE_USED";
@ -116,23 +132,13 @@ bool Ascii::Describe(ODesc* desc, threading::Value* val, const string& name) con
break;
}
if ( size == (int)separators.unset_field.size() && memcmp(data, separators.unset_field.data(), size) == 0 )
{
// The value we'd write out would match exactly the
// place-holder we use for unset optional fields. We
// escape the first character so that the output
// won't be ambigious.
char hex[4] = {'\\', 'x', '0', '0'};
bytetohex(*data, hex + 2);
desc->AddRaw(hex, 4);
if ( escapeReservedContent(desc, separators.unset_field, data, size) )
break;
++data;
--size;
}
if ( size )
desc->AddN(data, size);
if ( escapeReservedContent(desc, separators.empty_field, data, size) )
break;
desc->AddN(data, size);
break;
}