| #!/usr/bin/python3 -i |
| # |
| # Copyright (c) 2013-2017 The Khronos Group Inc. |
| # |
| # 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. |
| |
| import os,re,sys |
| from generator import * |
| |
| # CGeneratorOptions - subclass of GeneratorOptions. |
| # |
| # Adds options used by COutputGenerator objects during C language header |
| # generation. |
| # |
| # Additional members |
| # prefixText - list of strings to prefix generated header with |
| # (usually a copyright statement + calling convention macros). |
| # protectFile - True if multiple inclusion protection should be |
| # generated (based on the filename) around the entire header. |
| # protectFeature - True if #ifndef..#endif protection should be |
| # generated around a feature interface in the header file. |
| # genFuncPointers - True if function pointer typedefs should be |
| # generated |
| # protectProto - If conditional protection should be generated |
| # around prototype declarations, set to either '#ifdef' |
| # to require opt-in (#ifdef protectProtoStr) or '#ifndef' |
| # to require opt-out (#ifndef protectProtoStr). Otherwise |
| # set to None. |
| # protectProtoStr - #ifdef/#ifndef symbol to use around prototype |
| # declarations, if protectProto is set |
| # apicall - string to use for the function declaration prefix, |
| # such as APICALL on Windows. |
| # apientry - string to use for the calling convention macro, |
| # in typedefs, such as APIENTRY. |
| # apientryp - string to use for the calling convention macro |
| # in function pointer typedefs, such as APIENTRYP. |
| # indentFuncProto - True if prototype declarations should put each |
| # parameter on a separate line |
| # indentFuncPointer - True if typedefed function pointers should put each |
| # parameter on a separate line |
| # alignFuncParam - if nonzero and parameters are being put on a |
| # separate line, align parameter names at the specified column |
| class CGeneratorOptions(GeneratorOptions): |
| """Represents options during C interface generation for headers""" |
| def __init__(self, |
| filename = None, |
| directory = '.', |
| apiname = None, |
| profile = None, |
| versions = '.*', |
| emitversions = '.*', |
| defaultExtensions = None, |
| addExtensions = None, |
| removeExtensions = None, |
| sortProcedure = regSortFeatures, |
| prefixText = "", |
| genFuncPointers = True, |
| protectFile = True, |
| protectFeature = True, |
| protectProto = None, |
| protectProtoStr = None, |
| apicall = '', |
| apientry = '', |
| apientryp = '', |
| indentFuncProto = True, |
| indentFuncPointer = False, |
| alignFuncParam = 0): |
| GeneratorOptions.__init__(self, filename, directory, apiname, profile, |
| versions, emitversions, defaultExtensions, |
| addExtensions, removeExtensions, sortProcedure) |
| self.prefixText = prefixText |
| self.genFuncPointers = genFuncPointers |
| self.protectFile = protectFile |
| self.protectFeature = protectFeature |
| self.protectProto = protectProto |
| self.protectProtoStr = protectProtoStr |
| self.apicall = apicall |
| self.apientry = apientry |
| self.apientryp = apientryp |
| self.indentFuncProto = indentFuncProto |
| self.indentFuncPointer = indentFuncPointer |
| self.alignFuncParam = alignFuncParam |
| |
| # COutputGenerator - subclass of OutputGenerator. |
| # Generates C-language API interfaces. |
| # |
| # ---- methods ---- |
| # COutputGenerator(errFile, warnFile, diagFile) - args as for |
| # OutputGenerator. Defines additional internal state. |
| # ---- methods overriding base class ---- |
| # beginFile(genOpts) |
| # endFile() |
| # beginFeature(interface, emit) |
| # endFeature() |
| # genType(typeinfo,name) |
| # genStruct(typeinfo,name) |
| # genGroup(groupinfo,name) |
| # genEnum(enuminfo, name) |
| # genCmd(cmdinfo) |
| class COutputGenerator(OutputGenerator): |
| """Generate specified API interfaces in a specific style, such as a C header""" |
| # This is an ordered list of sections in the header file. |
| TYPE_SECTIONS = ['include', 'define', 'basetype', 'handle', 'enum', |
| 'group', 'bitmask', 'funcpointer', 'struct'] |
| ALL_SECTIONS = TYPE_SECTIONS + ['commandPointer', 'command'] |
| def __init__(self, |
| errFile = sys.stderr, |
| warnFile = sys.stderr, |
| diagFile = sys.stdout): |
| OutputGenerator.__init__(self, errFile, warnFile, diagFile) |
| # Internal state - accumulators for different inner block text |
| self.sections = dict([(section, []) for section in self.ALL_SECTIONS]) |
| # |
| def beginFile(self, genOpts): |
| OutputGenerator.beginFile(self, genOpts) |
| # C-specific |
| # |
| # Multiple inclusion protection & C++ wrappers. |
| if (genOpts.protectFile and self.genOpts.filename): |
| headerSym = re.sub('\.h', '_h_', |
| os.path.basename(self.genOpts.filename)).upper() |
| write('#ifndef', headerSym, file=self.outFile) |
| write('#define', headerSym, '1', file=self.outFile) |
| self.newline() |
| write('#ifdef __cplusplus', file=self.outFile) |
| write('extern "C" {', file=self.outFile) |
| write('#endif', file=self.outFile) |
| self.newline() |
| # |
| # User-supplied prefix text, if any (list of strings) |
| if (genOpts.prefixText): |
| for s in genOpts.prefixText: |
| write(s, file=self.outFile) |
| # |
| # Some boilerplate describing what was generated - this |
| # will probably be removed later since the extensions |
| # pattern may be very long. |
| # write('/* Generated C header for:', file=self.outFile) |
| # write(' * API:', genOpts.apiname, file=self.outFile) |
| # if (genOpts.profile): |
| # write(' * Profile:', genOpts.profile, file=self.outFile) |
| # write(' * Versions considered:', genOpts.versions, file=self.outFile) |
| # write(' * Versions emitted:', genOpts.emitversions, file=self.outFile) |
| # write(' * Default extensions included:', genOpts.defaultExtensions, file=self.outFile) |
| # write(' * Additional extensions included:', genOpts.addExtensions, file=self.outFile) |
| # write(' * Extensions removed:', genOpts.removeExtensions, file=self.outFile) |
| # write(' */', file=self.outFile) |
| def endFile(self): |
| # C-specific |
| # Finish C++ wrapper and multiple inclusion protection |
| self.newline() |
| write('#ifdef __cplusplus', file=self.outFile) |
| write('}', file=self.outFile) |
| write('#endif', file=self.outFile) |
| if (self.genOpts.protectFile and self.genOpts.filename): |
| self.newline() |
| write('#endif', file=self.outFile) |
| # Finish processing in superclass |
| OutputGenerator.endFile(self) |
| def beginFeature(self, interface, emit): |
| # Start processing in superclass |
| OutputGenerator.beginFeature(self, interface, emit) |
| # C-specific |
| # Accumulate includes, defines, types, enums, function pointer typedefs, |
| # end function prototypes separately for this feature. They're only |
| # printed in endFeature(). |
| self.sections = dict([(section, []) for section in self.ALL_SECTIONS]) |
| def endFeature(self): |
| # C-specific |
| # Actually write the interface to the output file. |
| if (self.emit): |
| self.newline() |
| if (self.genOpts.protectFeature): |
| write('#ifndef', self.featureName, file=self.outFile) |
| # If type declarations are needed by other features based on |
| # this one, it may be necessary to suppress the ExtraProtect, |
| # or move it below the 'for section...' loop. |
| if (self.featureExtraProtect != None): |
| write('#ifdef', self.featureExtraProtect, file=self.outFile) |
| write('#define', self.featureName, '1', file=self.outFile) |
| for section in self.TYPE_SECTIONS: |
| contents = self.sections[section] |
| if contents: |
| write('\n'.join(contents), file=self.outFile) |
| self.newline() |
| if (self.genOpts.genFuncPointers and self.sections['commandPointer']): |
| write('\n'.join(self.sections['commandPointer']), file=self.outFile) |
| self.newline() |
| if (self.sections['command']): |
| if (self.genOpts.protectProto): |
| write(self.genOpts.protectProto, |
| self.genOpts.protectProtoStr, file=self.outFile) |
| write('\n'.join(self.sections['command']), end='', file=self.outFile) |
| if (self.genOpts.protectProto): |
| write('#endif', file=self.outFile) |
| else: |
| self.newline() |
| if (self.featureExtraProtect != None): |
| write('#endif /*', self.featureExtraProtect, '*/', file=self.outFile) |
| if (self.genOpts.protectFeature): |
| write('#endif /*', self.featureName, '*/', file=self.outFile) |
| # Finish processing in superclass |
| OutputGenerator.endFeature(self) |
| # |
| # Append a definition to the specified section |
| def appendSection(self, section, text): |
| # self.sections[section].append('SECTION: ' + section + '\n') |
| self.sections[section].append(text) |
| # |
| # Type generation |
| def genType(self, typeinfo, name): |
| OutputGenerator.genType(self, typeinfo, name) |
| typeElem = typeinfo.elem |
| # If the type is a struct type, traverse the imbedded <member> tags |
| # generating a structure. Otherwise, emit the tag text. |
| category = typeElem.get('category') |
| if (category == 'struct' or category == 'union'): |
| self.genStruct(typeinfo, name) |
| else: |
| # Replace <apientry /> tags with an APIENTRY-style string |
| # (from self.genOpts). Copy other text through unchanged. |
| # If the resulting text is an empty string, don't emit it. |
| s = noneStr(typeElem.text) |
| for elem in typeElem: |
| if (elem.tag == 'apientry'): |
| s += self.genOpts.apientry + noneStr(elem.tail) |
| else: |
| s += noneStr(elem.text) + noneStr(elem.tail) |
| if s: |
| # Add extra newline after multi-line entries. |
| if '\n' in s: |
| s += '\n' |
| # This is a temporary workaround for internal issue #877, |
| # while we consider other approaches. The problem is that |
| # function pointer types can have dependencies on structures |
| # and vice-versa, so they can't be strictly separated into |
| # sections. The workaround is to define those types in the |
| # same section, in dependency order. |
| if (category == 'funcpointer'): |
| self.appendSection('struct', s) |
| else: |
| self.appendSection(category, s) |
| # |
| # Struct (e.g. C "struct" type) generation. |
| # This is a special case of the <type> tag where the contents are |
| # interpreted as a set of <member> tags instead of freeform C |
| # C type declarations. The <member> tags are just like <param> |
| # tags - they are a declaration of a struct or union member. |
| # Only simple member declarations are supported (no nested |
| # structs etc.) |
| def genStruct(self, typeinfo, typeName): |
| OutputGenerator.genStruct(self, typeinfo, typeName) |
| body = 'typedef ' + typeinfo.elem.get('category') + ' ' + typeName + ' {\n' |
| # paramdecl = self.makeCParamDecl(typeinfo.elem, self.genOpts.alignFuncParam) |
| targetLen = 0; |
| for member in typeinfo.elem.findall('.//member'): |
| targetLen = max(targetLen, self.getCParamTypeLength(member)) |
| for member in typeinfo.elem.findall('.//member'): |
| body += self.makeCParamDecl(member, targetLen + 4) |
| body += ';\n' |
| body += '} ' + typeName + ';\n' |
| self.appendSection('struct', body) |
| # |
| # Group (e.g. C "enum" type) generation. |
| # These are concatenated together with other types. |
| def genGroup(self, groupinfo, groupName): |
| OutputGenerator.genGroup(self, groupinfo, groupName) |
| groupElem = groupinfo.elem |
| |
| expandName = re.sub(r'([0-9a-z_])([A-Z0-9])',r'\1_\2',groupName).upper() |
| |
| expandPrefix = expandName |
| expandSuffix = '' |
| expandSuffixMatch = re.search(r'[A-Z][A-Z]+$',groupName) |
| if expandSuffixMatch: |
| expandSuffix = '_' + expandSuffixMatch.group() |
| # Strip off the suffix from the prefix |
| expandPrefix = expandName.rsplit(expandSuffix, 1)[0] |
| |
| # Prefix |
| body = "\ntypedef enum " + groupName + " {\n" |
| |
| # @@ Should use the type="bitmask" attribute instead |
| isEnum = ('FLAG_BITS' not in expandPrefix) |
| |
| # Loop over the nested 'enum' tags. Keep track of the minimum and |
| # maximum numeric values, if they can be determined; but only for |
| # core API enumerants, not extension enumerants. This is inferred |
| # by looking for 'extends' attributes. |
| minName = None |
| for elem in groupElem.findall('enum'): |
| # Convert the value to an integer and use that to track min/max. |
| # Values of form -(number) are accepted but nothing more complex. |
| # Should catch exceptions here for more complex constructs. Not yet. |
| (numVal,strVal) = self.enumToValue(elem, True) |
| name = elem.get('name') |
| |
| # Check for duplicate enum values and raise an error if found. |
| for elem2 in groupElem.findall('enum'): |
| if (elem != elem2): |
| (numVal2,strVal2) = self.enumToValue(elem2, True) |
| if (numVal2 == numVal): |
| raise UserWarning('Duplicate enum ' + name + ' = ' + elem2.get('name') + ' = ' + strVal) |
| |
| # Extension enumerants are only included if they are required |
| if (self.isEnumRequired(elem)): |
| body += " " + name + " = " + strVal + ",\n" |
| |
| if (isEnum and elem.get('extends') is None): |
| if (minName == None): |
| minName = maxName = name |
| minValue = maxValue = numVal |
| elif (numVal < minValue): |
| minName = name |
| minValue = numVal |
| elif (numVal > maxValue): |
| maxName = name |
| maxValue = numVal |
| # Generate min/max value tokens and a range-padding enum. Need some |
| # additional padding to generate correct names... |
| if isEnum: |
| body += " " + expandPrefix + "_BEGIN_RANGE" + expandSuffix + " = " + minName + ",\n" |
| body += " " + expandPrefix + "_END_RANGE" + expandSuffix + " = " + maxName + ",\n" |
| body += " " + expandPrefix + "_RANGE_SIZE" + expandSuffix + " = (" + maxName + " - " + minName + " + 1),\n" |
| |
| body += " " + expandPrefix + "_MAX_ENUM" + expandSuffix + " = 0x7FFFFFFF\n" |
| |
| # Postfix |
| body += "} " + groupName + ";" |
| if groupElem.get('type') == 'bitmask': |
| section = 'bitmask' |
| else: |
| section = 'group' |
| self.appendSection(section, body) |
| # Enumerant generation |
| # <enum> tags may specify their values in several ways, but are usually |
| # just integers. |
| def genEnum(self, enuminfo, name): |
| OutputGenerator.genEnum(self, enuminfo, name) |
| (numVal,strVal) = self.enumToValue(enuminfo.elem, False) |
| body = '#define ' + name.ljust(33) + ' ' + strVal |
| self.appendSection('enum', body) |
| # |
| # Command generation |
| def genCmd(self, cmdinfo, name): |
| OutputGenerator.genCmd(self, cmdinfo, name) |
| # |
| decls = self.makeCDecls(cmdinfo.elem) |
| self.appendSection('command', decls[0] + '\n') |
| if (self.genOpts.genFuncPointers): |
| self.appendSection('commandPointer', decls[1]) |
