1488 lines
49 KiB
Python
Executable File
1488 lines
49 KiB
Python
Executable File
#! /usr/bin/env python
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"""Generate C code from an ASDL description."""
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import os
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import sys
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from argparse import ArgumentParser
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from pathlib import Path
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import asdl
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TABSIZE = 4
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MAX_COL = 80
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AUTOGEN_MESSAGE = "/* File automatically generated by {}. */\n\n"
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def get_c_type(name):
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"""Return a string for the C name of the type.
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This function special cases the default types provided by asdl.
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"""
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if name in asdl.builtin_types:
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return name
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else:
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return "%s_ty" % name
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def reflow_lines(s, depth):
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"""Reflow the line s indented depth tabs.
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Return a sequence of lines where no line extends beyond MAX_COL
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when properly indented. The first line is properly indented based
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exclusively on depth * TABSIZE. All following lines -- these are
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the reflowed lines generated by this function -- start at the same
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column as the first character beyond the opening { in the first
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line.
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"""
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size = MAX_COL - depth * TABSIZE
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if len(s) < size:
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return [s]
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lines = []
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cur = s
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padding = ""
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while len(cur) > size:
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i = cur.rfind(' ', 0, size)
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# XXX this should be fixed for real
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if i == -1 and 'GeneratorExp' in cur:
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i = size + 3
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assert i != -1, "Impossible line %d to reflow: %r" % (size, s)
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lines.append(padding + cur[:i])
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if len(lines) == 1:
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# find new size based on brace
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j = cur.find('{', 0, i)
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if j >= 0:
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j += 2 # account for the brace and the space after it
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size -= j
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padding = " " * j
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else:
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j = cur.find('(', 0, i)
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if j >= 0:
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j += 1 # account for the paren (no space after it)
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size -= j
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padding = " " * j
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cur = cur[i+1:]
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else:
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lines.append(padding + cur)
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return lines
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def reflow_c_string(s, depth):
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return '"%s"' % s.replace('\n', '\\n"\n%s"' % (' ' * depth * TABSIZE))
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def is_simple(sum):
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"""Return True if a sum is a simple.
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A sum is simple if its types have no fields, e.g.
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unaryop = Invert | Not | UAdd | USub
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"""
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for t in sum.types:
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if t.fields:
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return False
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return True
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def asdl_of(name, obj):
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if isinstance(obj, asdl.Product) or isinstance(obj, asdl.Constructor):
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fields = ", ".join(map(str, obj.fields))
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if fields:
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fields = "({})".format(fields)
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return "{}{}".format(name, fields)
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else:
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if is_simple(obj):
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types = " | ".join(type.name for type in obj.types)
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else:
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sep = "\n{}| ".format(" " * (len(name) + 1))
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types = sep.join(
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asdl_of(type.name, type) for type in obj.types
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)
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return "{} = {}".format(name, types)
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class EmitVisitor(asdl.VisitorBase):
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"""Visit that emits lines"""
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def __init__(self, file):
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self.file = file
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self.identifiers = set()
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self.singletons = set()
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self.types = set()
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super(EmitVisitor, self).__init__()
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def emit_identifier(self, name):
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self.identifiers.add(str(name))
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def emit_singleton(self, name):
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self.singletons.add(str(name))
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def emit_type(self, name):
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self.types.add(str(name))
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def emit(self, s, depth, reflow=True):
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# XXX reflow long lines?
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if reflow:
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lines = reflow_lines(s, depth)
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else:
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lines = [s]
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for line in lines:
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if line:
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line = (" " * TABSIZE * depth) + line
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self.file.write(line + "\n")
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class TypeDefVisitor(EmitVisitor):
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def visitModule(self, mod):
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for dfn in mod.dfns:
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self.visit(dfn)
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def visitType(self, type, depth=0):
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self.visit(type.value, type.name, depth)
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def visitSum(self, sum, name, depth):
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if is_simple(sum):
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self.simple_sum(sum, name, depth)
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else:
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self.sum_with_constructors(sum, name, depth)
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def simple_sum(self, sum, name, depth):
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enum = []
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for i in range(len(sum.types)):
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type = sum.types[i]
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enum.append("%s=%d" % (type.name, i + 1))
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enums = ", ".join(enum)
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ctype = get_c_type(name)
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s = "typedef enum _%s { %s } %s;" % (name, enums, ctype)
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self.emit(s, depth)
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self.emit("", depth)
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def sum_with_constructors(self, sum, name, depth):
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ctype = get_c_type(name)
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s = "typedef struct _%(name)s *%(ctype)s;" % locals()
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self.emit(s, depth)
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self.emit("", depth)
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def visitProduct(self, product, name, depth):
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ctype = get_c_type(name)
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s = "typedef struct _%(name)s *%(ctype)s;" % locals()
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self.emit(s, depth)
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self.emit("", depth)
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class StructVisitor(EmitVisitor):
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"""Visitor to generate typedefs for AST."""
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def visitModule(self, mod):
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for dfn in mod.dfns:
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self.visit(dfn)
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def visitType(self, type, depth=0):
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self.visit(type.value, type.name, depth)
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def visitSum(self, sum, name, depth):
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if not is_simple(sum):
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self.sum_with_constructors(sum, name, depth)
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def sum_with_constructors(self, sum, name, depth):
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def emit(s, depth=depth):
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self.emit(s % sys._getframe(1).f_locals, depth)
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enum = []
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for i in range(len(sum.types)):
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type = sum.types[i]
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enum.append("%s_kind=%d" % (type.name, i + 1))
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emit("enum _%(name)s_kind {" + ", ".join(enum) + "};")
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emit("struct _%(name)s {")
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emit("enum _%(name)s_kind kind;", depth + 1)
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emit("union {", depth + 1)
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for t in sum.types:
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self.visit(t, depth + 2)
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emit("} v;", depth + 1)
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for field in sum.attributes:
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# rudimentary attribute handling
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type = str(field.type)
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assert type in asdl.builtin_types, type
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emit("%s %s;" % (type, field.name), depth + 1);
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emit("};")
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emit("")
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def visitConstructor(self, cons, depth):
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if cons.fields:
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self.emit("struct {", depth)
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for f in cons.fields:
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self.visit(f, depth + 1)
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self.emit("} %s;" % cons.name, depth)
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self.emit("", depth)
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def visitField(self, field, depth):
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# XXX need to lookup field.type, because it might be something
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# like a builtin...
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ctype = get_c_type(field.type)
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name = field.name
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if field.seq:
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if field.type == 'cmpop':
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self.emit("asdl_int_seq *%(name)s;" % locals(), depth)
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else:
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self.emit("asdl_seq *%(name)s;" % locals(), depth)
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else:
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self.emit("%(ctype)s %(name)s;" % locals(), depth)
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def visitProduct(self, product, name, depth):
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self.emit("struct _%(name)s {" % locals(), depth)
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for f in product.fields:
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self.visit(f, depth + 1)
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for field in product.attributes:
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# rudimentary attribute handling
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type = str(field.type)
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assert type in asdl.builtin_types, type
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self.emit("%s %s;" % (type, field.name), depth + 1);
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self.emit("};", depth)
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self.emit("", depth)
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class PrototypeVisitor(EmitVisitor):
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"""Generate function prototypes for the .h file"""
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def visitModule(self, mod):
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for dfn in mod.dfns:
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self.visit(dfn)
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def visitType(self, type):
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self.visit(type.value, type.name)
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def visitSum(self, sum, name):
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if is_simple(sum):
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pass # XXX
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else:
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for t in sum.types:
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self.visit(t, name, sum.attributes)
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def get_args(self, fields):
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"""Return list of C argument into, one for each field.
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Argument info is 3-tuple of a C type, variable name, and flag
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that is true if type can be NULL.
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"""
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args = []
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unnamed = {}
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for f in fields:
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if f.name is None:
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name = f.type
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c = unnamed[name] = unnamed.get(name, 0) + 1
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if c > 1:
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name = "name%d" % (c - 1)
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else:
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name = f.name
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# XXX should extend get_c_type() to handle this
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if f.seq:
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if f.type == 'cmpop':
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ctype = "asdl_int_seq *"
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else:
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ctype = "asdl_seq *"
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else:
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ctype = get_c_type(f.type)
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args.append((ctype, name, f.opt or f.seq))
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return args
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def visitConstructor(self, cons, type, attrs):
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args = self.get_args(cons.fields)
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attrs = self.get_args(attrs)
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ctype = get_c_type(type)
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self.emit_function(cons.name, ctype, args, attrs)
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def emit_function(self, name, ctype, args, attrs, union=True):
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args = args + attrs
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if args:
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argstr = ", ".join(["%s %s" % (atype, aname)
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for atype, aname, opt in args])
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argstr += ", PyArena *arena"
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else:
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argstr = "PyArena *arena"
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margs = "a0"
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for i in range(1, len(args)+1):
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margs += ", a%d" % i
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self.emit("#define %s(%s) _Py_%s(%s)" % (name, margs, name, margs), 0,
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reflow=False)
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self.emit("%s _Py_%s(%s);" % (ctype, name, argstr), False)
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def visitProduct(self, prod, name):
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self.emit_function(name, get_c_type(name),
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self.get_args(prod.fields),
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self.get_args(prod.attributes),
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union=False)
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class FunctionVisitor(PrototypeVisitor):
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"""Visitor to generate constructor functions for AST."""
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def emit_function(self, name, ctype, args, attrs, union=True):
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def emit(s, depth=0, reflow=True):
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self.emit(s, depth, reflow)
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argstr = ", ".join(["%s %s" % (atype, aname)
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for atype, aname, opt in args + attrs])
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if argstr:
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argstr += ", PyArena *arena"
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else:
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argstr = "PyArena *arena"
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self.emit("%s" % ctype, 0)
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emit("%s(%s)" % (name, argstr))
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emit("{")
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emit("%s p;" % ctype, 1)
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for argtype, argname, opt in args:
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if not opt and argtype != "int":
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emit("if (!%s) {" % argname, 1)
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emit("PyErr_SetString(PyExc_ValueError,", 2)
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msg = "field '%s' is required for %s" % (argname, name)
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emit(' "%s");' % msg,
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2, reflow=False)
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emit('return NULL;', 2)
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emit('}', 1)
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emit("p = (%s)PyArena_Malloc(arena, sizeof(*p));" % ctype, 1);
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emit("if (!p)", 1)
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emit("return NULL;", 2)
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if union:
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self.emit_body_union(name, args, attrs)
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else:
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self.emit_body_struct(name, args, attrs)
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emit("return p;", 1)
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emit("}")
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emit("")
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def emit_body_union(self, name, args, attrs):
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def emit(s, depth=0, reflow=True):
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self.emit(s, depth, reflow)
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emit("p->kind = %s_kind;" % name, 1)
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for argtype, argname, opt in args:
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emit("p->v.%s.%s = %s;" % (name, argname, argname), 1)
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for argtype, argname, opt in attrs:
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emit("p->%s = %s;" % (argname, argname), 1)
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def emit_body_struct(self, name, args, attrs):
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def emit(s, depth=0, reflow=True):
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self.emit(s, depth, reflow)
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for argtype, argname, opt in args:
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emit("p->%s = %s;" % (argname, argname), 1)
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for argtype, argname, opt in attrs:
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emit("p->%s = %s;" % (argname, argname), 1)
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class PickleVisitor(EmitVisitor):
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def visitModule(self, mod):
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for dfn in mod.dfns:
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self.visit(dfn)
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def visitType(self, type):
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self.visit(type.value, type.name)
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def visitSum(self, sum, name):
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pass
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def visitProduct(self, sum, name):
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pass
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def visitConstructor(self, cons, name):
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pass
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def visitField(self, sum):
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pass
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class Obj2ModPrototypeVisitor(PickleVisitor):
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def visitProduct(self, prod, name):
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code = "static int obj2ast_%s(astmodulestate *state, PyObject* obj, %s* out, PyArena* arena);"
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self.emit(code % (name, get_c_type(name)), 0)
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visitSum = visitProduct
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class Obj2ModVisitor(PickleVisitor):
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def funcHeader(self, name):
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ctype = get_c_type(name)
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self.emit("int", 0)
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self.emit("obj2ast_%s(astmodulestate *state, PyObject* obj, %s* out, PyArena* arena)" % (name, ctype), 0)
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self.emit("{", 0)
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self.emit("int isinstance;", 1)
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self.emit("", 0)
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def sumTrailer(self, name, add_label=False):
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self.emit("", 0)
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# there's really nothing more we can do if this fails ...
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error = "expected some sort of %s, but got %%R" % name
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format = "PyErr_Format(PyExc_TypeError, \"%s\", obj);"
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self.emit(format % error, 1, reflow=False)
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if add_label:
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self.emit("failed:", 1)
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self.emit("Py_XDECREF(tmp);", 1)
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self.emit("return 1;", 1)
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self.emit("}", 0)
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self.emit("", 0)
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def simpleSum(self, sum, name):
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self.funcHeader(name)
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for t in sum.types:
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line = ("isinstance = PyObject_IsInstance(obj, "
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"state->%s_type);")
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self.emit(line % (t.name,), 1)
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self.emit("if (isinstance == -1) {", 1)
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self.emit("return 1;", 2)
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self.emit("}", 1)
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self.emit("if (isinstance) {", 1)
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self.emit("*out = %s;" % t.name, 2)
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self.emit("return 0;", 2)
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self.emit("}", 1)
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self.sumTrailer(name)
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def buildArgs(self, fields):
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return ", ".join(fields + ["arena"])
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def complexSum(self, sum, name):
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self.funcHeader(name)
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self.emit("PyObject *tmp = NULL;", 1)
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self.emit("PyObject *tp;", 1)
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for a in sum.attributes:
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self.visitAttributeDeclaration(a, name, sum=sum)
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self.emit("", 0)
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# XXX: should we only do this for 'expr'?
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self.emit("if (obj == Py_None) {", 1)
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self.emit("*out = NULL;", 2)
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self.emit("return 0;", 2)
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self.emit("}", 1)
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for a in sum.attributes:
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self.visitField(a, name, sum=sum, depth=1)
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for t in sum.types:
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self.emit("tp = state->%s_type;" % (t.name,), 1)
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self.emit("isinstance = PyObject_IsInstance(obj, tp);", 1)
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self.emit("if (isinstance == -1) {", 1)
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self.emit("return 1;", 2)
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self.emit("}", 1)
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self.emit("if (isinstance) {", 1)
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for f in t.fields:
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self.visitFieldDeclaration(f, t.name, sum=sum, depth=2)
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self.emit("", 0)
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for f in t.fields:
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self.visitField(f, t.name, sum=sum, depth=2)
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args = [f.name for f in t.fields] + [a.name for a in sum.attributes]
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self.emit("*out = %s(%s);" % (t.name, self.buildArgs(args)), 2)
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self.emit("if (*out == NULL) goto failed;", 2)
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self.emit("return 0;", 2)
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self.emit("}", 1)
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self.sumTrailer(name, True)
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def visitAttributeDeclaration(self, a, name, sum=sum):
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ctype = get_c_type(a.type)
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self.emit("%s %s;" % (ctype, a.name), 1)
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def visitSum(self, sum, name):
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if is_simple(sum):
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self.simpleSum(sum, name)
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else:
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self.complexSum(sum, name)
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def visitProduct(self, prod, name):
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ctype = get_c_type(name)
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self.emit("int", 0)
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self.emit("obj2ast_%s(astmodulestate *state, PyObject* obj, %s* out, PyArena* arena)" % (name, ctype), 0)
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self.emit("{", 0)
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self.emit("PyObject* tmp = NULL;", 1)
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for f in prod.fields:
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self.visitFieldDeclaration(f, name, prod=prod, depth=1)
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for a in prod.attributes:
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self.visitFieldDeclaration(a, name, prod=prod, depth=1)
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self.emit("", 0)
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for f in prod.fields:
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self.visitField(f, name, prod=prod, depth=1)
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for a in prod.attributes:
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self.visitField(a, name, prod=prod, depth=1)
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args = [f.name for f in prod.fields]
|
|
args.extend([a.name for a in prod.attributes])
|
|
self.emit("*out = %s(%s);" % (name, self.buildArgs(args)), 1)
|
|
self.emit("return 0;", 1)
|
|
self.emit("failed:", 0)
|
|
self.emit("Py_XDECREF(tmp);", 1)
|
|
self.emit("return 1;", 1)
|
|
self.emit("}", 0)
|
|
self.emit("", 0)
|
|
|
|
def visitFieldDeclaration(self, field, name, sum=None, prod=None, depth=0):
|
|
ctype = get_c_type(field.type)
|
|
if field.seq:
|
|
if self.isSimpleType(field):
|
|
self.emit("asdl_int_seq* %s;" % field.name, depth)
|
|
else:
|
|
self.emit("asdl_seq* %s;" % field.name, depth)
|
|
else:
|
|
ctype = get_c_type(field.type)
|
|
self.emit("%s %s;" % (ctype, field.name), depth)
|
|
|
|
def isSimpleSum(self, field):
|
|
# XXX can the members of this list be determined automatically?
|
|
return field.type in ('expr_context', 'boolop', 'operator',
|
|
'unaryop', 'cmpop')
|
|
|
|
def isNumeric(self, field):
|
|
return get_c_type(field.type) in ("int", "bool")
|
|
|
|
def isSimpleType(self, field):
|
|
return self.isSimpleSum(field) or self.isNumeric(field)
|
|
|
|
def visitField(self, field, name, sum=None, prod=None, depth=0):
|
|
ctype = get_c_type(field.type)
|
|
line = "if (_PyObject_LookupAttr(obj, state->%s, &tmp) < 0) {"
|
|
self.emit(line % field.name, depth)
|
|
self.emit("return 1;", depth+1)
|
|
self.emit("}", depth)
|
|
if not field.opt:
|
|
self.emit("if (tmp == NULL) {", depth)
|
|
message = "required field \\\"%s\\\" missing from %s" % (field.name, name)
|
|
format = "PyErr_SetString(PyExc_TypeError, \"%s\");"
|
|
self.emit(format % message, depth+1, reflow=False)
|
|
self.emit("return 1;", depth+1)
|
|
else:
|
|
self.emit("if (tmp == NULL || tmp == Py_None) {", depth)
|
|
self.emit("Py_CLEAR(tmp);", depth+1)
|
|
if self.isNumeric(field):
|
|
self.emit("%s = 0;" % field.name, depth+1)
|
|
elif not self.isSimpleType(field):
|
|
self.emit("%s = NULL;" % field.name, depth+1)
|
|
else:
|
|
raise TypeError("could not determine the default value for %s" % field.name)
|
|
self.emit("}", depth)
|
|
self.emit("else {", depth)
|
|
|
|
self.emit("int res;", depth+1)
|
|
if field.seq:
|
|
self.emit("Py_ssize_t len;", depth+1)
|
|
self.emit("Py_ssize_t i;", depth+1)
|
|
self.emit("if (!PyList_Check(tmp)) {", depth+1)
|
|
self.emit("PyErr_Format(PyExc_TypeError, \"%s field \\\"%s\\\" must "
|
|
"be a list, not a %%.200s\", _PyType_Name(Py_TYPE(tmp)));" %
|
|
(name, field.name),
|
|
depth+2, reflow=False)
|
|
self.emit("goto failed;", depth+2)
|
|
self.emit("}", depth+1)
|
|
self.emit("len = PyList_GET_SIZE(tmp);", depth+1)
|
|
if self.isSimpleType(field):
|
|
self.emit("%s = _Py_asdl_int_seq_new(len, arena);" % field.name, depth+1)
|
|
else:
|
|
self.emit("%s = _Py_asdl_seq_new(len, arena);" % field.name, depth+1)
|
|
self.emit("if (%s == NULL) goto failed;" % field.name, depth+1)
|
|
self.emit("for (i = 0; i < len; i++) {", depth+1)
|
|
self.emit("%s val;" % ctype, depth+2)
|
|
self.emit("PyObject *tmp2 = PyList_GET_ITEM(tmp, i);", depth+2)
|
|
self.emit("Py_INCREF(tmp2);", depth+2)
|
|
self.emit("res = obj2ast_%s(state, tmp2, &val, arena);" %
|
|
field.type, depth+2, reflow=False)
|
|
self.emit("Py_DECREF(tmp2);", depth+2)
|
|
self.emit("if (res != 0) goto failed;", depth+2)
|
|
self.emit("if (len != PyList_GET_SIZE(tmp)) {", depth+2)
|
|
self.emit("PyErr_SetString(PyExc_RuntimeError, \"%s field \\\"%s\\\" "
|
|
"changed size during iteration\");" %
|
|
(name, field.name),
|
|
depth+3, reflow=False)
|
|
self.emit("goto failed;", depth+3)
|
|
self.emit("}", depth+2)
|
|
self.emit("asdl_seq_SET(%s, i, val);" % field.name, depth+2)
|
|
self.emit("}", depth+1)
|
|
else:
|
|
self.emit("res = obj2ast_%s(state, tmp, &%s, arena);" %
|
|
(field.type, field.name), depth+1)
|
|
self.emit("if (res != 0) goto failed;", depth+1)
|
|
|
|
self.emit("Py_CLEAR(tmp);", depth+1)
|
|
self.emit("}", depth)
|
|
|
|
|
|
class MarshalPrototypeVisitor(PickleVisitor):
|
|
|
|
def prototype(self, sum, name):
|
|
ctype = get_c_type(name)
|
|
self.emit("static int marshal_write_%s(PyObject **, int *, %s);"
|
|
% (name, ctype), 0)
|
|
|
|
visitProduct = visitSum = prototype
|
|
|
|
|
|
class PyTypesDeclareVisitor(PickleVisitor):
|
|
|
|
def visitProduct(self, prod, name):
|
|
self.emit_type("%s_type" % name)
|
|
self.emit("static PyObject* ast2obj_%s(astmodulestate *state, void*);" % name, 0)
|
|
if prod.attributes:
|
|
for a in prod.attributes:
|
|
self.emit_identifier(a.name)
|
|
self.emit("static const char * const %s_attributes[] = {" % name, 0)
|
|
for a in prod.attributes:
|
|
self.emit('"%s",' % a.name, 1)
|
|
self.emit("};", 0)
|
|
if prod.fields:
|
|
for f in prod.fields:
|
|
self.emit_identifier(f.name)
|
|
self.emit("static const char * const %s_fields[]={" % name,0)
|
|
for f in prod.fields:
|
|
self.emit('"%s",' % f.name, 1)
|
|
self.emit("};", 0)
|
|
|
|
def visitSum(self, sum, name):
|
|
self.emit_type("%s_type" % name)
|
|
if sum.attributes:
|
|
for a in sum.attributes:
|
|
self.emit_identifier(a.name)
|
|
self.emit("static const char * const %s_attributes[] = {" % name, 0)
|
|
for a in sum.attributes:
|
|
self.emit('"%s",' % a.name, 1)
|
|
self.emit("};", 0)
|
|
ptype = "void*"
|
|
if is_simple(sum):
|
|
ptype = get_c_type(name)
|
|
for t in sum.types:
|
|
self.emit_singleton("%s_singleton" % t.name)
|
|
self.emit("static PyObject* ast2obj_%s(astmodulestate *state, %s);" % (name, ptype), 0)
|
|
for t in sum.types:
|
|
self.visitConstructor(t, name)
|
|
|
|
def visitConstructor(self, cons, name):
|
|
if cons.fields:
|
|
for t in cons.fields:
|
|
self.emit_identifier(t.name)
|
|
self.emit("static const char * const %s_fields[]={" % cons.name, 0)
|
|
for t in cons.fields:
|
|
self.emit('"%s",' % t.name, 1)
|
|
self.emit("};",0)
|
|
|
|
class PyTypesVisitor(PickleVisitor):
|
|
|
|
def visitModule(self, mod):
|
|
self.emit("""
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
PyObject *dict;
|
|
} AST_object;
|
|
|
|
static void
|
|
ast_dealloc(AST_object *self)
|
|
{
|
|
/* bpo-31095: UnTrack is needed before calling any callbacks */
|
|
PyTypeObject *tp = Py_TYPE(self);
|
|
PyObject_GC_UnTrack(self);
|
|
Py_CLEAR(self->dict);
|
|
freefunc free_func = PyType_GetSlot(tp, Py_tp_free);
|
|
assert(free_func != NULL);
|
|
free_func(self);
|
|
Py_DECREF(tp);
|
|
}
|
|
|
|
static int
|
|
ast_traverse(AST_object *self, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(Py_TYPE(self));
|
|
Py_VISIT(self->dict);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ast_clear(AST_object *self)
|
|
{
|
|
Py_CLEAR(self->dict);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ast_type_init(PyObject *self, PyObject *args, PyObject *kw)
|
|
{
|
|
Py_ssize_t i, numfields = 0;
|
|
int res = -1;
|
|
PyObject *key, *value, *fields;
|
|
astmodulestate *state = get_global_ast_state();
|
|
if (_PyObject_LookupAttr((PyObject*)Py_TYPE(self), state->_fields, &fields) < 0) {
|
|
goto cleanup;
|
|
}
|
|
if (fields) {
|
|
numfields = PySequence_Size(fields);
|
|
if (numfields == -1) {
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
res = 0; /* if no error occurs, this stays 0 to the end */
|
|
if (numfields < PyTuple_GET_SIZE(args)) {
|
|
PyErr_Format(PyExc_TypeError, "%.400s constructor takes at most "
|
|
"%zd positional argument%s",
|
|
_PyType_Name(Py_TYPE(self)),
|
|
numfields, numfields == 1 ? "" : "s");
|
|
res = -1;
|
|
goto cleanup;
|
|
}
|
|
for (i = 0; i < PyTuple_GET_SIZE(args); i++) {
|
|
/* cannot be reached when fields is NULL */
|
|
PyObject *name = PySequence_GetItem(fields, i);
|
|
if (!name) {
|
|
res = -1;
|
|
goto cleanup;
|
|
}
|
|
res = PyObject_SetAttr(self, name, PyTuple_GET_ITEM(args, i));
|
|
Py_DECREF(name);
|
|
if (res < 0) {
|
|
goto cleanup;
|
|
}
|
|
}
|
|
if (kw) {
|
|
i = 0; /* needed by PyDict_Next */
|
|
while (PyDict_Next(kw, &i, &key, &value)) {
|
|
int contains = PySequence_Contains(fields, key);
|
|
if (contains == -1) {
|
|
res = -1;
|
|
goto cleanup;
|
|
} else if (contains == 1) {
|
|
Py_ssize_t p = PySequence_Index(fields, key);
|
|
if (p == -1) {
|
|
res = -1;
|
|
goto cleanup;
|
|
}
|
|
if (p < PyTuple_GET_SIZE(args)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%.400s got multiple values for argument '%U'",
|
|
Py_TYPE(self)->tp_name, key);
|
|
res = -1;
|
|
goto cleanup;
|
|
}
|
|
}
|
|
res = PyObject_SetAttr(self, key, value);
|
|
if (res < 0) {
|
|
goto cleanup;
|
|
}
|
|
}
|
|
}
|
|
cleanup:
|
|
Py_XDECREF(fields);
|
|
return res;
|
|
}
|
|
|
|
/* Pickling support */
|
|
static PyObject *
|
|
ast_type_reduce(PyObject *self, PyObject *unused)
|
|
{
|
|
astmodulestate *state = get_global_ast_state();
|
|
PyObject *dict;
|
|
if (_PyObject_LookupAttr(self, state->__dict__, &dict) < 0) {
|
|
return NULL;
|
|
}
|
|
if (dict) {
|
|
return Py_BuildValue("O()N", Py_TYPE(self), dict);
|
|
}
|
|
return Py_BuildValue("O()", Py_TYPE(self));
|
|
}
|
|
|
|
static PyMemberDef ast_type_members[] = {
|
|
{"__dictoffset__", T_PYSSIZET, offsetof(AST_object, dict), READONLY},
|
|
{NULL} /* Sentinel */
|
|
};
|
|
|
|
static PyMethodDef ast_type_methods[] = {
|
|
{"__reduce__", ast_type_reduce, METH_NOARGS, NULL},
|
|
{NULL}
|
|
};
|
|
|
|
static PyGetSetDef ast_type_getsets[] = {
|
|
{"__dict__", PyObject_GenericGetDict, PyObject_GenericSetDict},
|
|
{NULL}
|
|
};
|
|
|
|
static PyType_Slot AST_type_slots[] = {
|
|
{Py_tp_dealloc, ast_dealloc},
|
|
{Py_tp_getattro, PyObject_GenericGetAttr},
|
|
{Py_tp_setattro, PyObject_GenericSetAttr},
|
|
{Py_tp_traverse, ast_traverse},
|
|
{Py_tp_clear, ast_clear},
|
|
{Py_tp_members, ast_type_members},
|
|
{Py_tp_methods, ast_type_methods},
|
|
{Py_tp_getset, ast_type_getsets},
|
|
{Py_tp_init, ast_type_init},
|
|
{Py_tp_alloc, PyType_GenericAlloc},
|
|
{Py_tp_new, PyType_GenericNew},
|
|
{Py_tp_free, PyObject_GC_Del},
|
|
{0, 0},
|
|
};
|
|
|
|
static PyType_Spec AST_type_spec = {
|
|
"ast.AST",
|
|
sizeof(AST_object),
|
|
0,
|
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
|
|
AST_type_slots
|
|
};
|
|
|
|
static PyObject *
|
|
make_type(astmodulestate *state, const char *type, PyObject* base,
|
|
const char* const* fields, int num_fields, const char *doc)
|
|
{
|
|
PyObject *fnames, *result;
|
|
int i;
|
|
fnames = PyTuple_New(num_fields);
|
|
if (!fnames) return NULL;
|
|
for (i = 0; i < num_fields; i++) {
|
|
PyObject *field = PyUnicode_InternFromString(fields[i]);
|
|
if (!field) {
|
|
Py_DECREF(fnames);
|
|
return NULL;
|
|
}
|
|
PyTuple_SET_ITEM(fnames, i, field);
|
|
}
|
|
result = PyObject_CallFunction((PyObject*)&PyType_Type, "s(O){OOOOOs}",
|
|
type, base,
|
|
state->_fields, fnames,
|
|
state->__module__,
|
|
state->ast,
|
|
state->__doc__, doc);
|
|
Py_DECREF(fnames);
|
|
return result;
|
|
}
|
|
|
|
static int
|
|
add_attributes(astmodulestate *state, PyObject *type, const char * const *attrs, int num_fields)
|
|
{
|
|
int i, result;
|
|
PyObject *s, *l = PyTuple_New(num_fields);
|
|
if (!l)
|
|
return 0;
|
|
for (i = 0; i < num_fields; i++) {
|
|
s = PyUnicode_InternFromString(attrs[i]);
|
|
if (!s) {
|
|
Py_DECREF(l);
|
|
return 0;
|
|
}
|
|
PyTuple_SET_ITEM(l, i, s);
|
|
}
|
|
result = PyObject_SetAttr(type, state->_attributes, l) >= 0;
|
|
Py_DECREF(l);
|
|
return result;
|
|
}
|
|
|
|
/* Conversion AST -> Python */
|
|
|
|
static PyObject* ast2obj_list(astmodulestate *state, asdl_seq *seq, PyObject* (*func)(astmodulestate *state, void*))
|
|
{
|
|
Py_ssize_t i, n = asdl_seq_LEN(seq);
|
|
PyObject *result = PyList_New(n);
|
|
PyObject *value;
|
|
if (!result)
|
|
return NULL;
|
|
for (i = 0; i < n; i++) {
|
|
value = func(state, asdl_seq_GET(seq, i));
|
|
if (!value) {
|
|
Py_DECREF(result);
|
|
return NULL;
|
|
}
|
|
PyList_SET_ITEM(result, i, value);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static PyObject* ast2obj_object(astmodulestate *Py_UNUSED(state), void *o)
|
|
{
|
|
if (!o)
|
|
o = Py_None;
|
|
Py_INCREF((PyObject*)o);
|
|
return (PyObject*)o;
|
|
}
|
|
#define ast2obj_constant ast2obj_object
|
|
#define ast2obj_identifier ast2obj_object
|
|
#define ast2obj_string ast2obj_object
|
|
|
|
static PyObject* ast2obj_int(astmodulestate *Py_UNUSED(state), long b)
|
|
{
|
|
return PyLong_FromLong(b);
|
|
}
|
|
|
|
/* Conversion Python -> AST */
|
|
|
|
static int obj2ast_object(astmodulestate *Py_UNUSED(state), PyObject* obj, PyObject** out, PyArena* arena)
|
|
{
|
|
if (obj == Py_None)
|
|
obj = NULL;
|
|
if (obj) {
|
|
if (PyArena_AddPyObject(arena, obj) < 0) {
|
|
*out = NULL;
|
|
return -1;
|
|
}
|
|
Py_INCREF(obj);
|
|
}
|
|
*out = obj;
|
|
return 0;
|
|
}
|
|
|
|
static int obj2ast_constant(astmodulestate *Py_UNUSED(state), PyObject* obj, PyObject** out, PyArena* arena)
|
|
{
|
|
if (PyArena_AddPyObject(arena, obj) < 0) {
|
|
*out = NULL;
|
|
return -1;
|
|
}
|
|
Py_INCREF(obj);
|
|
*out = obj;
|
|
return 0;
|
|
}
|
|
|
|
static int obj2ast_identifier(astmodulestate *state, PyObject* obj, PyObject** out, PyArena* arena)
|
|
{
|
|
if (!PyUnicode_CheckExact(obj) && obj != Py_None) {
|
|
PyErr_SetString(PyExc_TypeError, "AST identifier must be of type str");
|
|
return 1;
|
|
}
|
|
return obj2ast_object(state, obj, out, arena);
|
|
}
|
|
|
|
static int obj2ast_string(astmodulestate *state, PyObject* obj, PyObject** out, PyArena* arena)
|
|
{
|
|
if (!PyUnicode_CheckExact(obj) && !PyBytes_CheckExact(obj)) {
|
|
PyErr_SetString(PyExc_TypeError, "AST string must be of type str");
|
|
return 1;
|
|
}
|
|
return obj2ast_object(state, obj, out, arena);
|
|
}
|
|
|
|
static int obj2ast_int(astmodulestate* Py_UNUSED(state), PyObject* obj, int* out, PyArena* arena)
|
|
{
|
|
int i;
|
|
if (!PyLong_Check(obj)) {
|
|
PyErr_Format(PyExc_ValueError, "invalid integer value: %R", obj);
|
|
return 1;
|
|
}
|
|
|
|
i = _PyLong_AsInt(obj);
|
|
if (i == -1 && PyErr_Occurred())
|
|
return 1;
|
|
*out = i;
|
|
return 0;
|
|
}
|
|
|
|
static int add_ast_fields(astmodulestate *state)
|
|
{
|
|
PyObject *empty_tuple;
|
|
empty_tuple = PyTuple_New(0);
|
|
if (!empty_tuple ||
|
|
PyObject_SetAttrString(state->AST_type, "_fields", empty_tuple) < 0 ||
|
|
PyObject_SetAttrString(state->AST_type, "_attributes", empty_tuple) < 0) {
|
|
Py_XDECREF(empty_tuple);
|
|
return -1;
|
|
}
|
|
Py_DECREF(empty_tuple);
|
|
return 0;
|
|
}
|
|
|
|
""", 0, reflow=False)
|
|
|
|
self.emit("static int init_types(void)",0)
|
|
self.emit("{", 0)
|
|
self.emit("astmodulestate *state = get_global_ast_state();", 1)
|
|
self.emit("if (state->initialized) return 1;", 1)
|
|
self.emit("if (init_identifiers(state) < 0) return 0;", 1)
|
|
self.emit("state->AST_type = PyType_FromSpec(&AST_type_spec);", 1)
|
|
self.emit("if (!state->AST_type) return 0;", 1)
|
|
self.emit("if (add_ast_fields(state) < 0) return 0;", 1)
|
|
for dfn in mod.dfns:
|
|
self.visit(dfn)
|
|
self.emit("state->initialized = 1;", 1)
|
|
self.emit("return 1;", 1);
|
|
self.emit("}", 0)
|
|
|
|
def visitProduct(self, prod, name):
|
|
if prod.fields:
|
|
fields = name+"_fields"
|
|
else:
|
|
fields = "NULL"
|
|
self.emit('state->%s_type = make_type(state, "%s", state->AST_type, %s, %d,' %
|
|
(name, name, fields, len(prod.fields)), 1)
|
|
self.emit('%s);' % reflow_c_string(asdl_of(name, prod), 2), 2, reflow=False)
|
|
self.emit("if (!state->%s_type) return 0;" % name, 1)
|
|
self.emit_type("AST_type")
|
|
self.emit_type("%s_type" % name)
|
|
if prod.attributes:
|
|
self.emit("if (!add_attributes(state, state->%s_type, %s_attributes, %d)) return 0;" %
|
|
(name, name, len(prod.attributes)), 1)
|
|
else:
|
|
self.emit("if (!add_attributes(state, state->%s_type, NULL, 0)) return 0;" % name, 1)
|
|
self.emit_defaults(name, prod.fields, 1)
|
|
self.emit_defaults(name, prod.attributes, 1)
|
|
|
|
def visitSum(self, sum, name):
|
|
self.emit('state->%s_type = make_type(state, "%s", state->AST_type, NULL, 0,' %
|
|
(name, name), 1)
|
|
self.emit('%s);' % reflow_c_string(asdl_of(name, sum), 2), 2, reflow=False)
|
|
self.emit_type("%s_type" % name)
|
|
self.emit("if (!state->%s_type) return 0;" % name, 1)
|
|
if sum.attributes:
|
|
self.emit("if (!add_attributes(state, state->%s_type, %s_attributes, %d)) return 0;" %
|
|
(name, name, len(sum.attributes)), 1)
|
|
else:
|
|
self.emit("if (!add_attributes(state, state->%s_type, NULL, 0)) return 0;" % name, 1)
|
|
self.emit_defaults(name, sum.attributes, 1)
|
|
simple = is_simple(sum)
|
|
for t in sum.types:
|
|
self.visitConstructor(t, name, simple)
|
|
|
|
def visitConstructor(self, cons, name, simple):
|
|
if cons.fields:
|
|
fields = cons.name+"_fields"
|
|
else:
|
|
fields = "NULL"
|
|
self.emit('state->%s_type = make_type(state, "%s", state->%s_type, %s, %d,' %
|
|
(cons.name, cons.name, name, fields, len(cons.fields)), 1)
|
|
self.emit('%s);' % reflow_c_string(asdl_of(cons.name, cons), 2), 2, reflow=False)
|
|
self.emit("if (!state->%s_type) return 0;" % cons.name, 1)
|
|
self.emit_type("%s_type" % cons.name)
|
|
self.emit_defaults(cons.name, cons.fields, 1)
|
|
if simple:
|
|
self.emit("state->%s_singleton = PyType_GenericNew((PyTypeObject *)"
|
|
"state->%s_type, NULL, NULL);" %
|
|
(cons.name, cons.name), 1)
|
|
self.emit("if (!state->%s_singleton) return 0;" % cons.name, 1)
|
|
|
|
def emit_defaults(self, name, fields, depth):
|
|
for field in fields:
|
|
if field.opt:
|
|
self.emit('if (PyObject_SetAttr(state->%s_type, state->%s, Py_None) == -1)' %
|
|
(name, field.name), depth)
|
|
self.emit("return 0;", depth+1)
|
|
|
|
|
|
class ASTModuleVisitor(PickleVisitor):
|
|
|
|
def visitModule(self, mod):
|
|
self.emit("PyMODINIT_FUNC", 0)
|
|
self.emit("PyInit__ast(void)", 0)
|
|
self.emit("{", 0)
|
|
self.emit("PyObject *m = PyModule_Create(&_astmodule);", 1)
|
|
self.emit("if (!m) {", 1)
|
|
self.emit("return NULL;", 2)
|
|
self.emit("}", 1)
|
|
self.emit('astmodulestate *state = get_ast_state(m);', 1)
|
|
self.emit('', 1)
|
|
|
|
self.emit("if (!init_types()) {", 1)
|
|
self.emit("goto error;", 2)
|
|
self.emit("}", 1)
|
|
self.emit('if (PyModule_AddObject(m, "AST", state->AST_type) < 0) {', 1)
|
|
self.emit('goto error;', 2)
|
|
self.emit('}', 1)
|
|
self.emit('Py_INCREF(state->AST_type);', 1)
|
|
self.emit('if (PyModule_AddIntMacro(m, PyCF_ALLOW_TOP_LEVEL_AWAIT) < 0) {', 1)
|
|
self.emit("goto error;", 2)
|
|
self.emit('}', 1)
|
|
self.emit('if (PyModule_AddIntMacro(m, PyCF_ONLY_AST) < 0) {', 1)
|
|
self.emit("goto error;", 2)
|
|
self.emit('}', 1)
|
|
self.emit('if (PyModule_AddIntMacro(m, PyCF_TYPE_COMMENTS) < 0) {', 1)
|
|
self.emit("goto error;", 2)
|
|
self.emit('}', 1)
|
|
for dfn in mod.dfns:
|
|
self.visit(dfn)
|
|
self.emit("return m;", 1)
|
|
self.emit("", 0)
|
|
self.emit("error:", 0)
|
|
self.emit("Py_DECREF(m);", 1)
|
|
self.emit("return NULL;", 1)
|
|
self.emit("}", 0)
|
|
|
|
def visitProduct(self, prod, name):
|
|
self.addObj(name)
|
|
|
|
def visitSum(self, sum, name):
|
|
self.addObj(name)
|
|
for t in sum.types:
|
|
self.visitConstructor(t, name)
|
|
|
|
def visitConstructor(self, cons, name):
|
|
self.addObj(cons.name)
|
|
|
|
def addObj(self, name):
|
|
self.emit("if (PyModule_AddObject(m, \"%s\", "
|
|
"state->%s_type) < 0) {" % (name, name), 1)
|
|
self.emit("goto error;", 2)
|
|
self.emit('}', 1)
|
|
self.emit("Py_INCREF(state->%s_type);" % name, 1)
|
|
|
|
|
|
_SPECIALIZED_SEQUENCES = ('stmt', 'expr')
|
|
|
|
def find_sequence(fields, doing_specialization):
|
|
"""Return True if any field uses a sequence."""
|
|
for f in fields:
|
|
if f.seq:
|
|
if not doing_specialization:
|
|
return True
|
|
if str(f.type) not in _SPECIALIZED_SEQUENCES:
|
|
return True
|
|
return False
|
|
|
|
def has_sequence(types, doing_specialization):
|
|
for t in types:
|
|
if find_sequence(t.fields, doing_specialization):
|
|
return True
|
|
return False
|
|
|
|
|
|
class StaticVisitor(PickleVisitor):
|
|
CODE = '''Very simple, always emit this static code. Override CODE'''
|
|
|
|
def visit(self, object):
|
|
self.emit(self.CODE, 0, reflow=False)
|
|
|
|
|
|
class ObjVisitor(PickleVisitor):
|
|
|
|
def func_begin(self, name):
|
|
ctype = get_c_type(name)
|
|
self.emit("PyObject*", 0)
|
|
self.emit("ast2obj_%s(astmodulestate *state, void* _o)" % (name), 0)
|
|
self.emit("{", 0)
|
|
self.emit("%s o = (%s)_o;" % (ctype, ctype), 1)
|
|
self.emit("PyObject *result = NULL, *value = NULL;", 1)
|
|
self.emit("PyTypeObject *tp;", 1)
|
|
self.emit('if (!o) {', 1)
|
|
self.emit("Py_RETURN_NONE;", 2)
|
|
self.emit("}", 1)
|
|
|
|
def func_end(self):
|
|
self.emit("return result;", 1)
|
|
self.emit("failed:", 0)
|
|
self.emit("Py_XDECREF(value);", 1)
|
|
self.emit("Py_XDECREF(result);", 1)
|
|
self.emit("return NULL;", 1)
|
|
self.emit("}", 0)
|
|
self.emit("", 0)
|
|
|
|
def visitSum(self, sum, name):
|
|
if is_simple(sum):
|
|
self.simpleSum(sum, name)
|
|
return
|
|
self.func_begin(name)
|
|
self.emit("switch (o->kind) {", 1)
|
|
for i in range(len(sum.types)):
|
|
t = sum.types[i]
|
|
self.visitConstructor(t, i + 1, name)
|
|
self.emit("}", 1)
|
|
for a in sum.attributes:
|
|
self.emit("value = ast2obj_%s(state, o->%s);" % (a.type, a.name), 1)
|
|
self.emit("if (!value) goto failed;", 1)
|
|
self.emit('if (PyObject_SetAttr(result, state->%s, value) < 0)' % a.name, 1)
|
|
self.emit('goto failed;', 2)
|
|
self.emit('Py_DECREF(value);', 1)
|
|
self.func_end()
|
|
|
|
def simpleSum(self, sum, name):
|
|
self.emit("PyObject* ast2obj_%s(astmodulestate *state, %s_ty o)" % (name, name), 0)
|
|
self.emit("{", 0)
|
|
self.emit("switch(o) {", 1)
|
|
for t in sum.types:
|
|
self.emit("case %s:" % t.name, 2)
|
|
self.emit("Py_INCREF(state->%s_singleton);" % t.name, 3)
|
|
self.emit("return state->%s_singleton;" % t.name, 3)
|
|
self.emit("}", 1)
|
|
self.emit("Py_UNREACHABLE();", 1);
|
|
self.emit("}", 0)
|
|
|
|
def visitProduct(self, prod, name):
|
|
self.func_begin(name)
|
|
self.emit("tp = (PyTypeObject *)state->%s_type;" % name, 1)
|
|
self.emit("result = PyType_GenericNew(tp, NULL, NULL);", 1);
|
|
self.emit("if (!result) return NULL;", 1)
|
|
for field in prod.fields:
|
|
self.visitField(field, name, 1, True)
|
|
for a in prod.attributes:
|
|
self.emit("value = ast2obj_%s(state, o->%s);" % (a.type, a.name), 1)
|
|
self.emit("if (!value) goto failed;", 1)
|
|
self.emit("if (PyObject_SetAttr(result, state->%s, value) < 0)" % a.name, 1)
|
|
self.emit('goto failed;', 2)
|
|
self.emit('Py_DECREF(value);', 1)
|
|
self.func_end()
|
|
|
|
def visitConstructor(self, cons, enum, name):
|
|
self.emit("case %s_kind:" % cons.name, 1)
|
|
self.emit("tp = (PyTypeObject *)state->%s_type;" % cons.name, 2)
|
|
self.emit("result = PyType_GenericNew(tp, NULL, NULL);", 2);
|
|
self.emit("if (!result) goto failed;", 2)
|
|
for f in cons.fields:
|
|
self.visitField(f, cons.name, 2, False)
|
|
self.emit("break;", 2)
|
|
|
|
def visitField(self, field, name, depth, product):
|
|
def emit(s, d):
|
|
self.emit(s, depth + d)
|
|
if product:
|
|
value = "o->%s" % field.name
|
|
else:
|
|
value = "o->v.%s.%s" % (name, field.name)
|
|
self.set(field, value, depth)
|
|
emit("if (!value) goto failed;", 0)
|
|
emit("if (PyObject_SetAttr(result, state->%s, value) == -1)" % field.name, 0)
|
|
emit("goto failed;", 1)
|
|
emit("Py_DECREF(value);", 0)
|
|
|
|
def emitSeq(self, field, value, depth, emit):
|
|
emit("seq = %s;" % value, 0)
|
|
emit("n = asdl_seq_LEN(seq);", 0)
|
|
emit("value = PyList_New(n);", 0)
|
|
emit("if (!value) goto failed;", 0)
|
|
emit("for (i = 0; i < n; i++) {", 0)
|
|
self.set("value", field, "asdl_seq_GET(seq, i)", depth + 1)
|
|
emit("if (!value1) goto failed;", 1)
|
|
emit("PyList_SET_ITEM(value, i, value1);", 1)
|
|
emit("value1 = NULL;", 1)
|
|
emit("}", 0)
|
|
|
|
def set(self, field, value, depth):
|
|
if field.seq:
|
|
# XXX should really check for is_simple, but that requires a symbol table
|
|
if field.type == "cmpop":
|
|
# While the sequence elements are stored as void*,
|
|
# ast2obj_cmpop expects an enum
|
|
self.emit("{", depth)
|
|
self.emit("Py_ssize_t i, n = asdl_seq_LEN(%s);" % value, depth+1)
|
|
self.emit("value = PyList_New(n);", depth+1)
|
|
self.emit("if (!value) goto failed;", depth+1)
|
|
self.emit("for(i = 0; i < n; i++)", depth+1)
|
|
# This cannot fail, so no need for error handling
|
|
self.emit("PyList_SET_ITEM(value, i, ast2obj_cmpop(state, (cmpop_ty)asdl_seq_GET(%s, i)));" % value,
|
|
depth+2, reflow=False)
|
|
self.emit("}", depth)
|
|
else:
|
|
self.emit("value = ast2obj_list(state, %s, ast2obj_%s);" % (value, field.type), depth)
|
|
else:
|
|
ctype = get_c_type(field.type)
|
|
self.emit("value = ast2obj_%s(state, %s);" % (field.type, value), depth, reflow=False)
|
|
|
|
|
|
class PartingShots(StaticVisitor):
|
|
|
|
CODE = """
|
|
PyObject* PyAST_mod2obj(mod_ty t)
|
|
{
|
|
if (!init_types()) {
|
|
return NULL;
|
|
}
|
|
|
|
astmodulestate *state = get_global_ast_state();
|
|
return ast2obj_mod(state, t);
|
|
}
|
|
|
|
/* mode is 0 for "exec", 1 for "eval" and 2 for "single" input */
|
|
mod_ty PyAST_obj2mod(PyObject* ast, PyArena* arena, int mode)
|
|
{
|
|
const char * const req_name[] = {"Module", "Expression", "Interactive"};
|
|
int isinstance;
|
|
|
|
if (PySys_Audit("compile", "OO", ast, Py_None) < 0) {
|
|
return NULL;
|
|
}
|
|
|
|
astmodulestate *state = get_global_ast_state();
|
|
PyObject *req_type[3];
|
|
req_type[0] = state->Module_type;
|
|
req_type[1] = state->Expression_type;
|
|
req_type[2] = state->Interactive_type;
|
|
|
|
assert(0 <= mode && mode <= 2);
|
|
|
|
if (!init_types()) {
|
|
return NULL;
|
|
}
|
|
|
|
isinstance = PyObject_IsInstance(ast, req_type[mode]);
|
|
if (isinstance == -1)
|
|
return NULL;
|
|
if (!isinstance) {
|
|
PyErr_Format(PyExc_TypeError, "expected %s node, got %.400s",
|
|
req_name[mode], _PyType_Name(Py_TYPE(ast)));
|
|
return NULL;
|
|
}
|
|
|
|
mod_ty res = NULL;
|
|
if (obj2ast_mod(state, ast, &res, arena) != 0)
|
|
return NULL;
|
|
else
|
|
return res;
|
|
}
|
|
|
|
int PyAST_Check(PyObject* obj)
|
|
{
|
|
if (!init_types()) {
|
|
return -1;
|
|
}
|
|
|
|
astmodulestate *state = get_global_ast_state();
|
|
return PyObject_IsInstance(obj, state->AST_type);
|
|
}
|
|
"""
|
|
|
|
class ChainOfVisitors:
|
|
def __init__(self, *visitors):
|
|
self.visitors = visitors
|
|
|
|
def visit(self, object):
|
|
for v in self.visitors:
|
|
v.visit(object)
|
|
v.emit("", 0)
|
|
|
|
|
|
def generate_module_def(f, mod):
|
|
# Gather all the data needed for ModuleSpec
|
|
visitor_list = set()
|
|
with open(os.devnull, "w") as devnull:
|
|
visitor = PyTypesDeclareVisitor(devnull)
|
|
visitor.visit(mod)
|
|
visitor_list.add(visitor)
|
|
visitor = PyTypesVisitor(devnull)
|
|
visitor.visit(mod)
|
|
visitor_list.add(visitor)
|
|
|
|
state_strings = {
|
|
"ast",
|
|
"_fields",
|
|
"__doc__",
|
|
"__dict__",
|
|
"__module__",
|
|
"_attributes",
|
|
}
|
|
module_state = state_strings.copy()
|
|
for visitor in visitor_list:
|
|
for identifier in visitor.identifiers:
|
|
module_state.add(identifier)
|
|
state_strings.add(identifier)
|
|
for singleton in visitor.singletons:
|
|
module_state.add(singleton)
|
|
for tp in visitor.types:
|
|
module_state.add(tp)
|
|
state_strings = sorted(state_strings)
|
|
module_state = sorted(module_state)
|
|
f.write('typedef struct {\n')
|
|
f.write(' int initialized;\n')
|
|
for s in module_state:
|
|
f.write(' PyObject *' + s + ';\n')
|
|
f.write('} astmodulestate;\n\n')
|
|
f.write("""
|
|
static astmodulestate global_ast_state;
|
|
|
|
static astmodulestate *
|
|
get_ast_state(PyObject *Py_UNUSED(module))
|
|
{
|
|
return &global_ast_state;
|
|
}
|
|
|
|
static int astmodule_clear(PyObject *module)
|
|
{
|
|
astmodulestate *state = get_ast_state(module);
|
|
""")
|
|
for s in module_state:
|
|
f.write(" Py_CLEAR(state->" + s + ');\n')
|
|
f.write("""
|
|
return 0;
|
|
}
|
|
|
|
static int astmodule_traverse(PyObject *module, visitproc visit, void* arg)
|
|
{
|
|
astmodulestate *state = get_ast_state(module);
|
|
""")
|
|
for s in module_state:
|
|
f.write(" Py_VISIT(state->" + s + ');\n')
|
|
f.write("""
|
|
return 0;
|
|
}
|
|
|
|
static void astmodule_free(void* module) {
|
|
astmodule_clear((PyObject*)module);
|
|
}
|
|
|
|
static struct PyModuleDef _astmodule = {
|
|
PyModuleDef_HEAD_INIT,
|
|
.m_name = "_ast",
|
|
.m_size = -1,
|
|
.m_traverse = astmodule_traverse,
|
|
.m_clear = astmodule_clear,
|
|
.m_free = astmodule_free,
|
|
};
|
|
|
|
#define get_global_ast_state() (&global_ast_state)
|
|
|
|
""")
|
|
f.write('static int init_identifiers(astmodulestate *state)\n')
|
|
f.write('{\n')
|
|
for identifier in state_strings:
|
|
f.write(' if ((state->' + identifier)
|
|
f.write(' = PyUnicode_InternFromString("')
|
|
f.write(identifier + '")) == NULL) return 0;\n')
|
|
f.write(' return 1;\n')
|
|
f.write('};\n\n')
|
|
|
|
def write_header(f, mod):
|
|
f.write('#ifndef Py_PYTHON_AST_H\n')
|
|
f.write('#define Py_PYTHON_AST_H\n')
|
|
f.write('#ifdef __cplusplus\n')
|
|
f.write('extern "C" {\n')
|
|
f.write('#endif\n')
|
|
f.write('\n')
|
|
f.write('#ifndef Py_LIMITED_API\n')
|
|
f.write('#include "asdl.h"\n')
|
|
f.write('\n')
|
|
f.write('#undef Yield /* undefine macro conflicting with <winbase.h> */\n')
|
|
f.write('\n')
|
|
c = ChainOfVisitors(TypeDefVisitor(f),
|
|
StructVisitor(f))
|
|
c.visit(mod)
|
|
f.write("// Note: these macros affect function definitions, not only call sites.\n")
|
|
PrototypeVisitor(f).visit(mod)
|
|
f.write("\n")
|
|
f.write("PyObject* PyAST_mod2obj(mod_ty t);\n")
|
|
f.write("mod_ty PyAST_obj2mod(PyObject* ast, PyArena* arena, int mode);\n")
|
|
f.write("int PyAST_Check(PyObject* obj);\n")
|
|
f.write("#endif /* !Py_LIMITED_API */\n")
|
|
f.write('\n')
|
|
f.write('#ifdef __cplusplus\n')
|
|
f.write('}\n')
|
|
f.write('#endif\n')
|
|
f.write('#endif /* !Py_PYTHON_AST_H */\n')
|
|
|
|
def write_source(f, mod):
|
|
f.write('#include <stddef.h>\n')
|
|
f.write('\n')
|
|
f.write('#include "Python.h"\n')
|
|
f.write('#include "%s-ast.h"\n' % mod.name)
|
|
f.write('#include "structmember.h" // PyMemberDef\n')
|
|
f.write('\n')
|
|
|
|
generate_module_def(f, mod)
|
|
|
|
v = ChainOfVisitors(
|
|
PyTypesDeclareVisitor(f),
|
|
PyTypesVisitor(f),
|
|
Obj2ModPrototypeVisitor(f),
|
|
FunctionVisitor(f),
|
|
ObjVisitor(f),
|
|
Obj2ModVisitor(f),
|
|
ASTModuleVisitor(f),
|
|
PartingShots(f),
|
|
)
|
|
v.visit(mod)
|
|
|
|
def main(input_file, c_file, h_file, dump_module=False):
|
|
auto_gen_msg = AUTOGEN_MESSAGE.format("/".join(Path(__file__).parts[-2:]))
|
|
mod = asdl.parse(input_file)
|
|
if dump_module:
|
|
print('Parsed Module:')
|
|
print(mod)
|
|
if not asdl.check(mod):
|
|
sys.exit(1)
|
|
for file, writer in (c_file, write_source), (h_file, write_header):
|
|
if file is not None:
|
|
with file.open("w") as f:
|
|
f.write(auto_gen_msg)
|
|
writer(f, mod)
|
|
print(file, "regenerated.")
|
|
|
|
if __name__ == "__main__":
|
|
parser = ArgumentParser()
|
|
parser.add_argument("input_file", type=Path)
|
|
parser.add_argument("-C", "--c-file", type=Path, default=None)
|
|
parser.add_argument("-H", "--h-file", type=Path, default=None)
|
|
parser.add_argument("-d", "--dump-module", action="store_true")
|
|
|
|
options = parser.parse_args()
|
|
main(**vars(options))
|