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cwObject.cpp : Added use of _udiff() to avoid unsigned subtractions from wrapping around 0.

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This commit is contained in:
kevin 2021-12-27 20:28:09 -05:00
parent d30a112cae
commit 5e93cb4e03
1 changed files with 21 additions and 26 deletions
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47
cwObject.cpp
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@ -42,6 +42,11 @@ namespace cw
{ lex::kErrorLexTId,""}
};
unsigned _udiff( unsigned n, unsigned i )
{
return i>=n ? 0 : n-i;
}
unsigned _lexSegmentedIdMatcher( const char* cp, unsigned cn )
{
unsigned i = 0;
@ -76,22 +81,6 @@ namespace cw
const char* _objTypeIdToLabel( objTypeId_t tid );
void _objTypeNullToString( object_t* o, char* buf, unsigned bufN ) { snprintf(buf,bufN,"%s","NULL"); }
void _objTypeCharToString( object_t* o, char* buf, unsigned bufN ) { number_to_string<char>(o->u.c,buf,bufN,"%c"); }
void _objTypeInt8ToString( object_t* o, char* buf, unsigned bufN ) { number_to_string<int8_t>(o->u.i8,buf,bufN,"%i"); }
void _objTypeUInt8ToString( object_t* o, char* buf, unsigned bufN ) { number_to_string<uint8_t>(o->u.u8,buf,bufN,"%i"); }
void _objTypeInt16ToString( object_t* o, char* buf, unsigned bufN ) { number_to_string<int16_t>(o->u.i16,buf,bufN,"%i"); }
void _objTypeUInt16ToString( object_t* o, char* buf, unsigned bufN ) { number_to_string<uint16_t>(o->u.u16,buf,bufN,"%i"); }
void _objTypeInt32ToString( object_t* o, char* buf, unsigned bufN ) { number_to_string<int32_t>(o->u.i32,buf,bufN,"%i"); }
void _objTypeUInt32ToString( object_t* o, char* buf, unsigned bufN ) { number_to_string<uint32_t>(o->u.u32,buf,bufN,"%i"); }
void _objTypeInt64ToString( object_t* o, char* buf, unsigned bufN ) { number_to_string<int64_t>(o->u.i64,buf,bufN,"%i"); }
void _objTypeUInt64ToString( object_t* o, char* buf, unsigned bufN ) { number_to_string<uint64_t>(o->u.u64,buf,bufN,"%i"); }
void _objTypeBoolToString( object_t* o, char* buf, unsigned bufN ) { number_to_string<bool>(o->u.b,buf,bufN,"%i"); }
void _objTypeFloatToString( object_t* o, char* buf, unsigned bufN ) { number_to_string<float>(o->u.f,buf,bufN,"%f"); }
void _objTypeDoubleToString( object_t* o, char* buf, unsigned bufN ) { number_to_string<double>(o->u.d,buf,bufN,"%f"); }
void _objTypeStringToString( object_t* o, char* buf, unsigned bufN ) { snprintf(buf,bufN,"%s",o->u.str); }
rc_t _objTypeValueFromChar( const object_t* o, unsigned tid, void* dst ) { return getObjectValue(o->u.c,tid, dst,o->type->label); }
rc_t _objTypeValueFromInt8( const object_t* o, unsigned tid, void* dst ) { return getObjectValue(o->u.i8,tid, dst,o->type->label); }
rc_t _objTypeValueFromUInt8( const object_t* o, unsigned tid, void* dst ) { return getObjectValue(o->u.u8,tid, dst,o->type->label); }
@ -263,17 +252,23 @@ namespace cw
unsigned _objTypeToStringString( const object_t* o, char* buf, unsigned n )
{
unsigned i = snprintf(buf,n,"\"");
const char* str = o->u.str;
i += toText(buf+i,n-i,o->u.str);
if( str == nullptr )
{
cwLogWarning("Unexpected empty string while generating text output.");
}
return i + snprintf(buf+i,n-i,"\"");
i += toText(buf+i,_udiff(n,i),str);
return i + snprintf(buf+i,_udiff(n,i),"\"");
}
unsigned _objTypeToStringPair( const object_t* o, char* buf, unsigned n )
{
unsigned i = o->u.children->type->to_string(o->u.children,buf,n);
i += snprintf(buf+i,n-i," : ");
return i + o->u.children->sibling->type->to_string(o->u.children->sibling,buf+i,n-i);
i += snprintf(buf+i,_udiff(n,i)," : ");
return i + o->u.children->sibling->type->to_string(o->u.children->sibling,buf+i,_udiff(n,i));
}
unsigned _objTypeToStringList( const object_t* o, char* buf, unsigned n )
@ -283,14 +278,14 @@ namespace cw
for(const object_t* ch=o->u.children; ch!=nullptr; ch=ch->sibling)
{
i += ch->type->to_string(ch,buf+i,n-i);
i += ch->type->to_string(ch,buf+i,_udiff(n,i));
if( ch->sibling != nullptr )
i += snprintf(buf+i,n-i,", ");
i += snprintf(buf+i,_udiff(n,i),", ");
}
i += snprintf(buf+i,n-i," ] ");
i += snprintf(buf+i,_udiff(n,i)," ] ");
return i;
}
@ -302,13 +297,13 @@ namespace cw
for(const object_t* ch=o->u.children; ch!=nullptr; ch=ch->sibling)
{
i += ch->type->to_string(ch,buf+i,n-i);
i += ch->type->to_string(ch,buf+i,_udiff(n,i));
if( ch->sibling != nullptr )
i += snprintf(buf+i,n-i,", ");
i += snprintf(buf+i,_udiff(n,i),", ");
}
i += snprintf(buf+i,n-i," } ");
i += snprintf(buf+i,_udiff(n,i)," } ");
return i;
}