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Vulkan-Hpp/XMLHelper.hpp

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// Copyright(c) 2023, NVIDIA CORPORATION. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#pragma once
#include <assert.h>
#include <fstream>
#include <iostream>
#include <map>
#include <regex>
#include <set>
#include <string>
#include <tinyxml2.h>
#include <vector>
struct TypeInfo;
void checkAttributes( int line,
std::map<std::string, std::string> const & attributes,
std::map<std::string, std::set<std::string>> const & required,
std::map<std::string, std::set<std::string>> const & optional );
void checkElements( int line,
std::vector<tinyxml2::XMLElement const *> const & elements,
std::map<std::string, bool> const & required,
std::set<std::string> const & optional = {} );
void checkForError( bool condition, int line, std::string const & message );
void checkForWarning( bool condition, int line, std::string const & message );
std::string generateCopyrightMessage( std::string const & comment );
std::string generateStandardArrayWrapper( std::string const & type, std::vector<std::string> const & sizes );
std::map<std::string, std::string> getAttributes( tinyxml2::XMLElement const * element );
template <typename ElementContainer>
std::vector<tinyxml2::XMLElement const *> getChildElements( ElementContainer const * element );
std::string readComment( tinyxml2::XMLElement const * element );
std::pair<std::vector<std::string>, std::string> readModifiers( tinyxml2::XMLNode const * node );
TypeInfo readTypeInfo( tinyxml2::XMLElement const * element );
std::string replaceWithMap( std::string const & input, std::map<std::string, std::string> replacements );
std::string stripPostfix( std::string const & value, std::string const & postfix );
std::string stripPrefix( std::string const & value, std::string const & prefix );
std::string toCamelCase( std::string const & value, bool keepSeparatedNumbersSeparated = false );
std::vector<std::string> tokenize( std::string const & tokenString, std::string const & separator );
std::string toString( tinyxml2::XMLError error );
std::string toUpperCase( std::string const & name );
std::string trim( std::string const & input );
std::string trimEnd( std::string const & input );
std::string trimStars( std::string const & input );
void writeToFile( std::string const & str, std::string const & fileName );
struct TypeInfo
{
std::string compose( std::string const & nameSpace, std::string const & prefix_ = "Vk" ) const
{
return prefix + ( prefix.empty() ? "" : " " ) +
( nameSpace.empty() ? type : ( ( ( type.starts_with( prefix_ ) ) ? ( nameSpace + "::" ) : "" ) + stripPrefix( type, prefix_ ) ) ) +
( postfix.empty() ? "" : " " ) + postfix;
}
bool operator==( TypeInfo const & rhs ) const noexcept
{
return ( prefix == rhs.prefix ) && ( type == rhs.type ) && ( postfix == rhs.postfix );
}
bool operator!=( TypeInfo const & rhs ) const noexcept
{
return !operator==( rhs );
}
bool operator<( TypeInfo const & rhs ) const noexcept
{
return ( prefix < rhs.prefix ) || ( ( prefix == rhs.prefix ) && ( ( type < rhs.type ) || ( ( type == rhs.type ) && ( postfix < rhs.postfix ) ) ) );
}
bool isConstPointer() const noexcept
{
return isPointer() && ( prefix.find( "const" ) != std::string::npos );
}
bool isNonConstPointer() const noexcept
{
return isPointer() && ( prefix.find( "const" ) == std::string::npos );
}
bool isPointer() const noexcept
{
return postfix.find( '*' ) != std::string::npos;
}
bool isValue() const noexcept
{
return ( ( prefix.find( '*' ) == std::string::npos ) && ( postfix.find( '*' ) == std::string::npos ) );
}
std::string prefix = {};
std::string type = {};
std::string postfix = {};
};
struct ExternalTypeData
{
std::string require = {};
int xmlLine = 0;
};
struct IncludeData
{
int xmlLine = {};
};
enum class TypeCategory
{
Bitmask,
BaseType,
Constant,
Define,
Enum,
ExternalType,
FuncPointer,
Handle,
Include,
Struct,
Union,
Unknown
};
struct TypeData
{
TypeCategory category = TypeCategory::Unknown;
std::set<std::string> requiredBy = {};
int xmlLine = {};
};
// check the validity of an attributes map
// line : the line in the xml file where the attributes are listed
// attributes : the map of name/value pairs of the encountered attributes
// required : the required attributes, with a set of allowed values per attribute
// optional : the optional attributes, with a set of allowed values per attribute
inline void checkAttributes( int line,
std::map<std::string, std::string> const & attributes,
std::map<std::string, std::set<std::string>> const & required,
std::map<std::string, std::set<std::string>> const & optional )
{
// check if all required attributes are included and if there is a set of allowed values, check if the actual
// value is part of that set
for ( auto const & r : required )
{
auto attributesIt = attributes.find( r.first );
checkForError( attributesIt != attributes.end(), line, "missing attribute <" + r.first + ">" );
if ( !r.second.empty() )
{
std::vector<std::string> values = tokenize( attributesIt->second, "," );
for ( auto const & v : values )
{
checkForError( r.second.find( v ) != r.second.end(), line, "unexpected attribute value <" + v + "> in attribute <" + attributesIt->first + ">" );
}
}
}
// check if all not required attributes or optional, and if there is a set of allowed values, check if the
// actual value is part of that set
for ( auto const & a : attributes )
{
if ( required.find( a.first ) == required.end() )
{
auto optionalIt = optional.find( a.first );
if ( optionalIt == optional.end() )
{
checkForWarning( false, line, "unknown attribute <" + a.first + ">" );
continue;
}
else if ( !optionalIt->second.empty() )
{
std::vector<std::string> values = tokenize( a.second, "," );
for ( auto const & v : values )
{
checkForWarning(
optionalIt->second.find( v ) != optionalIt->second.end(), line, "unexpected attribute value <" + v + "> in attribute <" + a.first + ">" );
}
}
}
}
}
inline void checkElements( int line,
std::vector<tinyxml2::XMLElement const *> const & elements,
std::map<std::string, bool> const & required,
std::set<std::string> const & optional )
{
std::map<std::string, size_t> encountered;
for ( auto const & e : elements )
{
std::string value = e->Value();
encountered[value]++;
checkForWarning(
( required.find( value ) != required.end() ) || ( optional.find( value ) != optional.end() ), e->GetLineNum(), "unknown element <" + value + ">" );
}
for ( auto const & r : required )
{
auto encounteredIt = encountered.find( r.first );
checkForError( encounteredIt != encountered.end(), line, "missing required element <" + r.first + ">" );
// check: r.second (means: required excactly once) => (encouteredIt->second == 1)
checkForError( !r.second || ( encounteredIt->second == 1 ),
line,
"required element <" + r.first + "> is supposed to be listed exactly once, but is listed " + std::to_string( encounteredIt->second ) );
}
}
inline void checkForError( bool condition, int line, std::string const & message )
{
if ( !condition )
{
throw std::runtime_error( "VulkanHppGenerator: Spec error on line " + std::to_string( line ) + ": " + message );
}
}
inline void checkForWarning( bool condition, int line, std::string const & message )
{
if ( !condition )
{
std::cerr << "VulkanHppGenerator: Spec warning on line " << std::to_string( line ) << ": " << message << "!" << std::endl;
}
}
inline std::string generateCopyrightMessage( std::string const & comment )
{
std::string copyrightMessage = comment;
// replace any '\n' with "\n// "
for ( size_t pos = copyrightMessage.find( '\n' ); pos != std::string::npos; pos = copyrightMessage.find( '\n', pos + 1 ) )
{
copyrightMessage.replace( pos, 1, "\n// " );
}
// remove any trailing spaces
copyrightMessage = trimEnd( copyrightMessage );
// and add a little message on our own
copyrightMessage += "\n\n// This header is generated from the Khronos Vulkan XML API Registry.";
return trim( copyrightMessage ) + "\n";
}
inline std::string generateStandardArrayWrapper( std::string const & type, std::vector<std::string> const & sizes )
{
std::string arrayString = "VULKAN_HPP_NAMESPACE::ArrayWrapper" + std::to_string( sizes.size() ) + "D<" + type;
for ( auto const & size : sizes )
{
arrayString += ", " + size;
}
arrayString += ">";
return arrayString;
}
inline std::map<std::string, std::string> getAttributes( tinyxml2::XMLElement const * element )
{
assert( element );
std::map<std::string, std::string> attributes;
for ( auto attribute = element->FirstAttribute(); attribute; attribute = attribute->Next() )
{
assert( attributes.find( attribute->Name() ) == attributes.end() );
attributes[attribute->Name()] = attribute->Value();
}
return attributes;
}
template <typename ElementContainer>
inline std::vector<tinyxml2::XMLElement const *> getChildElements( ElementContainer const * element )
{
std::vector<tinyxml2::XMLElement const *> childElements;
for ( tinyxml2::XMLElement const * childElement = element->FirstChildElement(); childElement; childElement = childElement->NextSiblingElement() )
{
childElements.push_back( childElement );
}
return childElements;
}
inline bool isHexNumber( std::string const & name ) noexcept
{
return name.starts_with( "0x" ) && ( name.find_first_not_of( "0123456789ABCDEF", 2 ) == std::string::npos );
}
inline bool isNumber( std::string const & name ) noexcept
{
return name.find_first_not_of( "0123456789" ) == std::string::npos;
}
inline std::string readComment( tinyxml2::XMLElement const * element )
{
const int line = element->GetLineNum();
checkAttributes( line, getAttributes( element ), {}, {} );
checkElements( line, getChildElements( element ), {} );
return element->GetText();
}
inline std::pair<std::vector<std::string>, std::string> readModifiers( tinyxml2::XMLNode const * node )
{
std::vector<std::string> arraySizes;
std::string bitCount;
if ( node && node->ToText() )
{
// following the name there might be some array size
std::string value = trim( node->Value() );
assert( !value.empty() );
if ( value[0] == '[' )
{
std::string::size_type endPos = 0;
while ( endPos + 1 != value.length() )
{
const std::string::size_type startPos = value.find( '[', endPos );
checkForError( startPos != std::string::npos, node->GetLineNum(), "could not find '[' in <" + value + ">" );
endPos = value.find( ']', startPos );
checkForError( endPos != std::string::npos, node->GetLineNum(), "could not find ']' in <" + value + ">" );
checkForError( startPos + 2 <= endPos, node->GetLineNum(), "missing content between '[' and ']' in <" + value + ">" );
arraySizes.push_back( value.substr( startPos + 1, endPos - startPos - 1 ) );
}
}
else if ( value[0] == ':' )
{
bitCount = trim( value.substr( 1 ) );
}
else
{
checkForError( ( value[0] == ';' ) || ( value[0] == ')' ), node->GetLineNum(), "unknown modifier <" + value + ">" );
}
}
return std::make_pair( arraySizes, bitCount );
}
inline TypeInfo readTypeInfo( tinyxml2::XMLElement const * element )
{
TypeInfo typeInfo;
tinyxml2::XMLNode const * previousSibling = element->PreviousSibling();
if ( previousSibling && previousSibling->ToText() )
{
typeInfo.prefix = trim( previousSibling->Value() );
}
typeInfo.type = element->GetText();
tinyxml2::XMLNode const * nextSibling = element->NextSibling();
if ( nextSibling && nextSibling->ToText() )
{
typeInfo.postfix = trimStars( trimEnd( nextSibling->Value() ) );
}
return typeInfo;
}
inline std::string replaceWithMap( std::string const & input, std::map<std::string, std::string> replacements )
{
// This will match ${someVariable} and contain someVariable in match group 1
std::regex re( R"(\$\{([^\}]+)\})" );
auto it = std::sregex_iterator( input.begin(), input.end(), re );
auto end = std::sregex_iterator();
// No match, just return the original string
if ( it == end )
{
assert( replacements.empty() );
return input;
}
#if !defined( NDEBUG )
std::set<std::string> matchedReplacements;
#endif
std::string result = "";
while ( it != end )
{
std::smatch match = *it;
auto itReplacement = replacements.find( match[1].str() );
assert( itReplacement != replacements.end() );
#if !defined( NDEBUG )
matchedReplacements.insert( match[1].str() );
#endif
result += match.prefix().str() + ( ( itReplacement != replacements.end() ) ? itReplacement->second : match[0].str() );
++it;
// we've passed the last match. Append the rest of the orignal string
if ( it == end )
{
result += match.suffix().str();
}
}
#if !defined( NDEBUG )
std::set<std::string> missedReplacements;
for ( auto r : replacements )
{
if ( matchedReplacements.find( r.first ) == matchedReplacements.end() )
{
missedReplacements.insert( r.first );
}
}
assert( missedReplacements.empty() );
#endif
return result;
}
inline std::string stripPostfix( std::string const & value, std::string const & postfix )
{
std::string strippedValue = value;
if ( strippedValue.ends_with( postfix ) )
{
strippedValue.erase( strippedValue.length() - postfix.length() );
}
return strippedValue;
}
inline std::string stripPrefix( std::string const & value, std::string const & prefix )
{
std::string strippedValue = value;
if ( strippedValue.starts_with( prefix ) )
{
strippedValue.erase( 0, prefix.length() );
}
return strippedValue;
}
inline std::string toCamelCase( std::string const & value, bool keepSeparatedNumbersSeparated )
{
assert( !value.empty() && ( isupper( value[0] ) || isdigit( value[0] ) ) );
std::string result;
result.reserve( value.size() );
for ( size_t i = 0; i < value.size(); ++i )
{
if ( value[i] == '_' )
{
if ( keepSeparatedNumbersSeparated && ( 0 < i ) && isdigit( value[i - 1] ) && ( i < value.size() - 1 ) && isdigit( value[i + 1] ) )
{
result.push_back( '_' );
}
}
else
{
result.push_back( ( ( 0 == i ) || ( value[i - 1] == '_' ) || isdigit( value[i - 1] ) ) ? value[i] : static_cast<char>( tolower( value[i] ) ) );
}
}
#if 0
bool keepUpper = true;
for ( auto c : value )
{
if ( c == '_' )
{
keepUpper = true;
}
else if ( isdigit( c ) )
{
keepUpper = true;
result.push_back( c );
}
else if ( keepUpper )
{
result.push_back( c );
keepUpper = false;
}
else
{
result.push_back( static_cast<char>( tolower( c ) ) );
}
}
#endif
return result;
}
inline std::vector<std::string> tokenize( std::string const & tokenString, std::string const & separator )
{
std::vector<std::string> tokens;
if ( !tokenString.empty() )
{
size_t start = 0, end;
do
{
end = tokenString.find( separator, start );
if ( start != end )
{
tokens.push_back( trim( tokenString.substr( start, end - start ) ) );
}
start = end + separator.length();
} while ( end != std::string::npos );
}
return tokens;
}
inline std::string toString( tinyxml2::XMLError error )
{
switch ( error )
{
case tinyxml2::XML_SUCCESS: return "XML_SUCCESS";
case tinyxml2::XML_NO_ATTRIBUTE: return "XML_NO_ATTRIBUTE";
case tinyxml2::XML_WRONG_ATTRIBUTE_TYPE: return "XML_WRONG_ATTRIBUTE_TYPE";
case tinyxml2::XML_ERROR_FILE_NOT_FOUND: return "XML_ERROR_FILE_NOT_FOUND";
case tinyxml2::XML_ERROR_FILE_COULD_NOT_BE_OPENED: return "XML_ERROR_FILE_COULD_NOT_BE_OPENED";
case tinyxml2::XML_ERROR_FILE_READ_ERROR: return "XML_ERROR_FILE_READ_ERROR";
case tinyxml2::XML_ERROR_PARSING_ELEMENT: return "XML_ERROR_PARSING_ELEMENT";
case tinyxml2::XML_ERROR_PARSING_ATTRIBUTE: return "XML_ERROR_PARSING_ATTRIBUTE";
case tinyxml2::XML_ERROR_PARSING_TEXT: return "XML_ERROR_PARSING_TEXT";
case tinyxml2::XML_ERROR_PARSING_CDATA: return "XML_ERROR_PARSING_CDATA";
case tinyxml2::XML_ERROR_PARSING_COMMENT: return "XML_ERROR_PARSING_COMMENT";
case tinyxml2::XML_ERROR_PARSING_DECLARATION: return "XML_ERROR_PARSING_DECLARATION";
case tinyxml2::XML_ERROR_PARSING_UNKNOWN: return "XML_ERROR_PARSING_UNKNOWN";
case tinyxml2::XML_ERROR_EMPTY_DOCUMENT: return "XML_ERROR_EMPTY_DOCUMENT";
case tinyxml2::XML_ERROR_MISMATCHED_ELEMENT: return "XML_ERROR_MISMATCHED_ELEMENT";
case tinyxml2::XML_ERROR_PARSING: return "XML_ERROR_PARSING";
case tinyxml2::XML_CAN_NOT_CONVERT_TEXT: return "XML_CAN_NOT_CONVERT_TEXT";
case tinyxml2::XML_NO_TEXT_NODE: return "XML_NO_TEXT_NODE";
default: return "unknown error code <" + std::to_string( error ) + ">";
}
}
std::string toUpperCase( std::string const & name )
{
std::string convertedName;
bool previousIsLowerCase = false;
bool previousIsDigit = false;
for ( auto c : name )
{
if ( ( isupper( c ) && ( previousIsLowerCase || previousIsDigit ) ) || ( isdigit( c ) && previousIsLowerCase ) )
{
convertedName.push_back( '_' );
}
convertedName.push_back( static_cast<char>( toupper( c ) ) );
previousIsLowerCase = !!islower( c );
previousIsDigit = !!isdigit( c );
}
return convertedName;
}
inline std::string trim( std::string const & input )
{
std::string result = input;
result.erase( result.begin(), std::find_if( result.begin(), result.end(), []( char c ) noexcept { return !std::isspace( c ); } ) );
result.erase( std::find_if( result.rbegin(), result.rend(), []( char c ) noexcept { return !std::isspace( c ); } ).base(), result.end() );
return result;
}
inline std::string trimEnd( std::string const & input )
{
std::string result = input;
result.erase( std::find_if( result.rbegin(), result.rend(), []( char c ) noexcept { return !std::isspace( c ); } ).base(), result.end() );
return result;
}
inline std::string trimStars( std::string const & input )
{
std::string result = input;
size_t pos = result.find( '*' );
while ( pos != std::string::npos )
{
if ( ( 0 < pos ) && ( result[pos - 1] != ' ' ) && ( result[pos - 1] != '*' ) )
{
result.insert( pos, 1, ' ' );
++pos;
}
else if ( ( pos < result.length() - 1 ) && ( result[pos + 1] != ' ' ) && ( result[pos + 1] != '*' ) )
{
result.insert( pos + 1, 1, ' ' );
}
pos = result.find( '*', pos + 1 );
}
return result;
}
void writeToFile( std::string const & str, std::string const & fileName )
{
std::ofstream ofs( fileName );
assert( !ofs.fail() );
ofs << str;
ofs.close();
#if defined( CLANG_FORMAT_EXECUTABLE )
std::cout << "VulkanHppGenerator: Formatting " << fileName << " ..." << std::endl;
const std::string commandString = "\"" CLANG_FORMAT_EXECUTABLE "\" -i --style=file " + fileName;
const int ret = std::system( commandString.c_str() );
if ( ret != 0 )
{
std::cout << "VulkanHppGenerator: failed to format file " << fileName << " with error <" << ret << ">\n";
}
#endif
}
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