| 1 | #! /usr/bin/env python
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| 2 | """Generate C code from an ASDL description."""
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| 3 |
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| 4 | # TO DO
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| 5 | # handle fields that have a type but no name
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| 6 |
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| 7 | import os, sys
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| 8 |
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| 9 | import asdl
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| 10 |
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| 11 | TABSIZE = 8
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| 12 | MAX_COL = 80
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| 13 |
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| 14 | def get_c_type(name):
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| 15 | """Return a string for the C name of the type.
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| 16 |
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| 17 | This function special cases the default types provided by asdl:
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| 18 | identifier, string, int, bool.
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| 19 | """
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| 20 | # XXX ack! need to figure out where Id is useful and where string
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| 21 | if isinstance(name, asdl.Id):
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| 22 | name = name.value
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| 23 | if name in asdl.builtin_types:
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| 24 | return name
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| 25 | else:
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| 26 | return "%s_ty" % name
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| 27 |
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| 28 | def reflow_lines(s, depth):
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| 29 | """Reflow the line s indented depth tabs.
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| 30 |
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| 31 | Return a sequence of lines where no line extends beyond MAX_COL
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| 32 | when properly indented. The first line is properly indented based
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| 33 | exclusively on depth * TABSIZE. All following lines -- these are
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| 34 | the reflowed lines generated by this function -- start at the same
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| 35 | column as the first character beyond the opening { in the first
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| 36 | line.
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| 37 | """
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| 38 | size = MAX_COL - depth * TABSIZE
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| 39 | if len(s) < size:
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| 40 | return [s]
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| 41 |
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| 42 | lines = []
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| 43 | cur = s
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| 44 | padding = ""
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| 45 | while len(cur) > size:
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| 46 | i = cur.rfind(' ', 0, size)
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| 47 | # XXX this should be fixed for real
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| 48 | if i == -1 and 'GeneratorExp' in cur:
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| 49 | i = size + 3
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| 50 | assert i != -1, "Impossible line %d to reflow: %r" % (size, s)
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| 51 | lines.append(padding + cur[:i])
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| 52 | if len(lines) == 1:
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| 53 | # find new size based on brace
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| 54 | j = cur.find('{', 0, i)
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| 55 | if j >= 0:
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| 56 | j += 2 # account for the brace and the space after it
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| 57 | size -= j
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| 58 | padding = " " * j
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| 59 | else:
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| 60 | j = cur.find('(', 0, i)
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| 61 | if j >= 0:
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| 62 | j += 1 # account for the paren (no space after it)
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| 63 | size -= j
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| 64 | padding = " " * j
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| 65 | cur = cur[i+1:]
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| 66 | else:
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| 67 | lines.append(padding + cur)
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| 68 | return lines
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| 69 |
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| 70 | def is_simple(sum):
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| 71 | """Return True if a sum is a simple.
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| 72 |
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| 73 | A sum is simple if its types have no fields, e.g.
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| 74 | unaryop = Invert | Not | UAdd | USub
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| 75 | """
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| 76 | for t in sum.types:
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| 77 | if t.fields:
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| 78 | return False
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| 79 | return True
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| 80 |
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| 81 |
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| 82 | class EmitVisitor(asdl.VisitorBase):
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| 83 | """Visit that emits lines"""
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| 84 |
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| 85 | def __init__(self, file):
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| 86 | self.file = file
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| 87 | super(EmitVisitor, self).__init__()
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| 88 |
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| 89 | def emit(self, s, depth, reflow=True):
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| 90 | # XXX reflow long lines?
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| 91 | if reflow:
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| 92 | lines = reflow_lines(s, depth)
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| 93 | else:
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| 94 | lines = [s]
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| 95 | for line in lines:
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| 96 | line = (" " * TABSIZE * depth) + line + "\n"
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| 97 | self.file.write(line)
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| 98 |
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| 99 |
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| 100 | class TypeDefVisitor(EmitVisitor):
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| 101 | def visitModule(self, mod):
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| 102 | for dfn in mod.dfns:
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| 103 | self.visit(dfn)
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| 104 |
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| 105 | def visitType(self, type, depth=0):
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| 106 | self.visit(type.value, type.name, depth)
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| 107 |
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| 108 | def visitSum(self, sum, name, depth):
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| 109 | if is_simple(sum):
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| 110 | self.simple_sum(sum, name, depth)
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| 111 | else:
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| 112 | self.sum_with_constructors(sum, name, depth)
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| 113 |
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| 114 | def simple_sum(self, sum, name, depth):
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| 115 | enum = []
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| 116 | for i in range(len(sum.types)):
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| 117 | type = sum.types[i]
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| 118 | enum.append("%s=%d" % (type.name, i + 1))
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| 119 | enums = ", ".join(enum)
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| 120 | ctype = get_c_type(name)
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| 121 | s = "typedef enum _%s { %s } %s;" % (name, enums, ctype)
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| 122 | self.emit(s, depth)
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| 123 | self.emit("", depth)
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| 124 |
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| 125 | def sum_with_constructors(self, sum, name, depth):
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| 126 | ctype = get_c_type(name)
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| 127 | s = "typedef struct _%(name)s *%(ctype)s;" % locals()
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| 128 | self.emit(s, depth)
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| 129 | self.emit("", depth)
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| 130 |
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| 131 | def visitProduct(self, product, name, depth):
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| 132 | ctype = get_c_type(name)
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| 133 | s = "typedef struct _%(name)s *%(ctype)s;" % locals()
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| 134 | self.emit(s, depth)
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| 135 | self.emit("", depth)
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| 136 |
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| 137 |
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| 138 | class StructVisitor(EmitVisitor):
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| 139 | """Visitor to generate typdefs for AST."""
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| 140 |
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| 141 | def visitModule(self, mod):
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| 142 | for dfn in mod.dfns:
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| 143 | self.visit(dfn)
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| 144 |
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| 145 | def visitType(self, type, depth=0):
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| 146 | self.visit(type.value, type.name, depth)
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| 147 |
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| 148 | def visitSum(self, sum, name, depth):
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| 149 | if not is_simple(sum):
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| 150 | self.sum_with_constructors(sum, name, depth)
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| 151 |
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| 152 | def sum_with_constructors(self, sum, name, depth):
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| 153 | def emit(s, depth=depth):
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| 154 | self.emit(s % sys._getframe(1).f_locals, depth)
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| 155 | enum = []
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| 156 | for i in range(len(sum.types)):
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| 157 | type = sum.types[i]
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| 158 | enum.append("%s_kind=%d" % (type.name, i + 1))
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| 159 |
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| 160 | emit("enum _%(name)s_kind {" + ", ".join(enum) + "};")
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| 161 |
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| 162 | emit("struct _%(name)s {")
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| 163 | emit("enum _%(name)s_kind kind;", depth + 1)
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| 164 | emit("union {", depth + 1)
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| 165 | for t in sum.types:
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| 166 | self.visit(t, depth + 2)
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| 167 | emit("} v;", depth + 1)
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| 168 | for field in sum.attributes:
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| 169 | # rudimentary attribute handling
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| 170 | type = str(field.type)
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| 171 | assert type in asdl.builtin_types, type
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| 172 | emit("%s %s;" % (type, field.name), depth + 1);
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| 173 | emit("};")
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| 174 | emit("")
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| 175 |
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| 176 | def visitConstructor(self, cons, depth):
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| 177 | if cons.fields:
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| 178 | self.emit("struct {", depth)
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| 179 | for f in cons.fields:
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| 180 | self.visit(f, depth + 1)
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| 181 | self.emit("} %s;" % cons.name, depth)
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| 182 | self.emit("", depth)
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| 183 | else:
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| 184 | # XXX not sure what I want here, nothing is probably fine
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| 185 | pass
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| 186 |
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| 187 | def visitField(self, field, depth):
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| 188 | # XXX need to lookup field.type, because it might be something
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| 189 | # like a builtin...
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| 190 | ctype = get_c_type(field.type)
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| 191 | name = field.name
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| 192 | if field.seq:
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| 193 | if field.type.value in ('cmpop',):
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| 194 | self.emit("asdl_int_seq *%(name)s;" % locals(), depth)
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| 195 | else:
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| 196 | self.emit("asdl_seq *%(name)s;" % locals(), depth)
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| 197 | else:
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| 198 | self.emit("%(ctype)s %(name)s;" % locals(), depth)
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| 199 |
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| 200 | def visitProduct(self, product, name, depth):
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| 201 | self.emit("struct _%(name)s {" % locals(), depth)
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| 202 | for f in product.fields:
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| 203 | self.visit(f, depth + 1)
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| 204 | self.emit("};", depth)
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| 205 | self.emit("", depth)
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| 206 |
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| 207 |
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| 208 | class PrototypeVisitor(EmitVisitor):
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| 209 | """Generate function prototypes for the .h file"""
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| 210 |
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| 211 | def visitModule(self, mod):
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| 212 | for dfn in mod.dfns:
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| 213 | self.visit(dfn)
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| 214 |
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| 215 | def visitType(self, type):
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| 216 | self.visit(type.value, type.name)
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| 217 |
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| 218 | def visitSum(self, sum, name):
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| 219 | if is_simple(sum):
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| 220 | pass # XXX
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| 221 | else:
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| 222 | for t in sum.types:
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| 223 | self.visit(t, name, sum.attributes)
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| 224 |
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| 225 | def get_args(self, fields):
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| 226 | """Return list of C argument into, one for each field.
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| 227 |
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| 228 | Argument info is 3-tuple of a C type, variable name, and flag
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| 229 | that is true if type can be NULL.
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| 230 | """
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| 231 | args = []
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| 232 | unnamed = {}
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| 233 | for f in fields:
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| 234 | if f.name is None:
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| 235 | name = f.type
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| 236 | c = unnamed[name] = unnamed.get(name, 0) + 1
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| 237 | if c > 1:
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| 238 | name = "name%d" % (c - 1)
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| 239 | else:
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| 240 | name = f.name
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| 241 | # XXX should extend get_c_type() to handle this
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| 242 | if f.seq:
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| 243 | if f.type.value in ('cmpop',):
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| 244 | ctype = "asdl_int_seq *"
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| 245 | else:
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| 246 | ctype = "asdl_seq *"
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| 247 | else:
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| 248 | ctype = get_c_type(f.type)
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| 249 | args.append((ctype, name, f.opt or f.seq))
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| 250 | return args
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| 251 |
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| 252 | def visitConstructor(self, cons, type, attrs):
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| 253 | args = self.get_args(cons.fields)
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| 254 | attrs = self.get_args(attrs)
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| 255 | ctype = get_c_type(type)
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| 256 | self.emit_function(cons.name, ctype, args, attrs)
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| 257 |
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| 258 | def emit_function(self, name, ctype, args, attrs, union=True):
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| 259 | args = args + attrs
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| 260 | if args:
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| 261 | argstr = ", ".join(["%s %s" % (atype, aname)
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| 262 | for atype, aname, opt in args])
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| 263 | argstr += ", PyArena *arena"
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| 264 | else:
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| 265 | argstr = "PyArena *arena"
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| 266 | margs = "a0"
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| 267 | for i in range(1, len(args)+1):
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| 268 | margs += ", a%d" % i
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| 269 | self.emit("#define %s(%s) _Py_%s(%s)" % (name, margs, name, margs), 0,
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| 270 | reflow=False)
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| 271 | self.emit("%s _Py_%s(%s);" % (ctype, name, argstr), False)
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| 272 |
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| 273 | def visitProduct(self, prod, name):
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| 274 | self.emit_function(name, get_c_type(name),
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| 275 | self.get_args(prod.fields), [], union=False)
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| 276 |
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| 277 |
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| 278 | class FunctionVisitor(PrototypeVisitor):
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| 279 | """Visitor to generate constructor functions for AST."""
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| 280 |
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| 281 | def emit_function(self, name, ctype, args, attrs, union=True):
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| 282 | def emit(s, depth=0, reflow=True):
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| 283 | self.emit(s, depth, reflow)
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| 284 | argstr = ", ".join(["%s %s" % (atype, aname)
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| 285 | for atype, aname, opt in args + attrs])
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| 286 | if argstr:
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| 287 | argstr += ", PyArena *arena"
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| 288 | else:
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| 289 | argstr = "PyArena *arena"
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| 290 | self.emit("%s" % ctype, 0)
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| 291 | emit("%s(%s)" % (name, argstr))
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| 292 | emit("{")
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| 293 | emit("%s p;" % ctype, 1)
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| 294 | for argtype, argname, opt in args:
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| 295 | # XXX hack alert: false is allowed for a bool
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| 296 | if not opt and not (argtype == "bool" or argtype == "int"):
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| 297 | emit("if (!%s) {" % argname, 1)
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| 298 | emit("PyErr_SetString(PyExc_ValueError,", 2)
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| 299 | msg = "field %s is required for %s" % (argname, name)
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| 300 | emit(' "%s");' % msg,
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| 301 | 2, reflow=False)
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| 302 | emit('return NULL;', 2)
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| 303 | emit('}', 1)
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| 304 |
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| 305 | emit("p = (%s)PyArena_Malloc(arena, sizeof(*p));" % ctype, 1);
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| 306 | emit("if (!p)", 1)
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| 307 | emit("return NULL;", 2)
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| 308 | if union:
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| 309 | self.emit_body_union(name, args, attrs)
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| 310 | else:
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| 311 | self.emit_body_struct(name, args, attrs)
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| 312 | emit("return p;", 1)
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| 313 | emit("}")
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| 314 | emit("")
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| 315 |
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| 316 | def emit_body_union(self, name, args, attrs):
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| 317 | def emit(s, depth=0, reflow=True):
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| 318 | self.emit(s, depth, reflow)
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| 319 | emit("p->kind = %s_kind;" % name, 1)
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| 320 | for argtype, argname, opt in args:
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| 321 | emit("p->v.%s.%s = %s;" % (name, argname, argname), 1)
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| 322 | for argtype, argname, opt in attrs:
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| 323 | emit("p->%s = %s;" % (argname, argname), 1)
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| 324 |
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| 325 | def emit_body_struct(self, name, args, attrs):
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| 326 | def emit(s, depth=0, reflow=True):
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| 327 | self.emit(s, depth, reflow)
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| 328 | for argtype, argname, opt in args:
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| 329 | emit("p->%s = %s;" % (argname, argname), 1)
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| 330 | assert not attrs
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| 331 |
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| 332 |
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| 333 | class PickleVisitor(EmitVisitor):
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| 334 |
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| 335 | def visitModule(self, mod):
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| 336 | for dfn in mod.dfns:
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| 337 | self.visit(dfn)
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| 338 |
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| 339 | def visitType(self, type):
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| 340 | self.visit(type.value, type.name)
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| 341 |
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| 342 | def visitSum(self, sum, name):
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| 343 | pass
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| 344 |
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| 345 | def visitProduct(self, sum, name):
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| 346 | pass
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| 347 |
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| 348 | def visitConstructor(self, cons, name):
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| 349 | pass
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| 350 |
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| 351 | def visitField(self, sum):
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| 352 | pass
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| 353 |
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| 354 |
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| 355 | class Obj2ModPrototypeVisitor(PickleVisitor):
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| 356 | def visitProduct(self, prod, name):
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| 357 | code = "static int obj2ast_%s(PyObject* obj, %s* out, PyArena* arena);"
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| 358 | self.emit(code % (name, get_c_type(name)), 0)
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| 359 |
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| 360 | visitSum = visitProduct
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| 361 |
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| 362 |
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| 363 | class Obj2ModVisitor(PickleVisitor):
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| 364 | def funcHeader(self, name):
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| 365 | ctype = get_c_type(name)
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| 366 | self.emit("int", 0)
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| 367 | self.emit("obj2ast_%s(PyObject* obj, %s* out, PyArena* arena)" % (name, ctype), 0)
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| 368 | self.emit("{", 0)
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| 369 | self.emit("PyObject* tmp = NULL;", 1)
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| 370 | self.emit("int isinstance;", 1)
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| 371 | self.emit("", 0)
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| 372 |
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| 373 | def sumTrailer(self, name):
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| 374 | self.emit("", 0)
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| 375 | self.emit("tmp = PyObject_Repr(obj);", 1)
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| 376 | # there's really nothing more we can do if this fails ...
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| 377 | self.emit("if (tmp == NULL) goto failed;", 1)
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| 378 | error = "expected some sort of %s, but got %%.400s" % name
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| 379 | format = "PyErr_Format(PyExc_TypeError, \"%s\", PyString_AS_STRING(tmp));"
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| 380 | self.emit(format % error, 1, reflow=False)
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| 381 | self.emit("failed:", 0)
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| 382 | self.emit("Py_XDECREF(tmp);", 1)
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| 383 | self.emit("return 1;", 1)
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| 384 | self.emit("}", 0)
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| 385 | self.emit("", 0)
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| 386 |
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| 387 | def simpleSum(self, sum, name):
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| 388 | self.funcHeader(name)
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| 389 | for t in sum.types:
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| 390 | line = ("isinstance = PyObject_IsInstance(obj, "
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| 391 | "(PyObject *)%s_type);")
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| 392 | self.emit(line % (t.name,), 1)
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| 393 | self.emit("if (isinstance == -1) {", 1)
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| 394 | self.emit("return 1;", 2)
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| 395 | self.emit("}", 1)
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| 396 | self.emit("if (isinstance) {", 1)
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| 397 | self.emit("*out = %s;" % t.name, 2)
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| 398 | self.emit("return 0;", 2)
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| 399 | self.emit("}", 1)
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| 400 | self.sumTrailer(name)
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| 401 |
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| 402 | def buildArgs(self, fields):
|
|---|
| 403 | return ", ".join(fields + ["arena"])
|
|---|
| 404 |
|
|---|
| 405 | def complexSum(self, sum, name):
|
|---|
| 406 | self.funcHeader(name)
|
|---|
| 407 | for a in sum.attributes:
|
|---|
| 408 | self.visitAttributeDeclaration(a, name, sum=sum)
|
|---|
| 409 | self.emit("", 0)
|
|---|
| 410 | # XXX: should we only do this for 'expr'?
|
|---|
| 411 | self.emit("if (obj == Py_None) {", 1)
|
|---|
| 412 | self.emit("*out = NULL;", 2)
|
|---|
| 413 | self.emit("return 0;", 2)
|
|---|
| 414 | self.emit("}", 1)
|
|---|
| 415 | for a in sum.attributes:
|
|---|
| 416 | self.visitField(a, name, sum=sum, depth=1)
|
|---|
| 417 | for t in sum.types:
|
|---|
| 418 | line = "isinstance = PyObject_IsInstance(obj, (PyObject*)%s_type);"
|
|---|
| 419 | self.emit(line % (t.name,), 1)
|
|---|
| 420 | self.emit("if (isinstance == -1) {", 1)
|
|---|
| 421 | self.emit("return 1;", 2)
|
|---|
| 422 | self.emit("}", 1)
|
|---|
| 423 | self.emit("if (isinstance) {", 1)
|
|---|
| 424 | for f in t.fields:
|
|---|
| 425 | self.visitFieldDeclaration(f, t.name, sum=sum, depth=2)
|
|---|
| 426 | self.emit("", 0)
|
|---|
| 427 | for f in t.fields:
|
|---|
| 428 | self.visitField(f, t.name, sum=sum, depth=2)
|
|---|
| 429 | args = [f.name.value for f in t.fields] + [a.name.value for a in sum.attributes]
|
|---|
| 430 | self.emit("*out = %s(%s);" % (t.name, self.buildArgs(args)), 2)
|
|---|
| 431 | self.emit("if (*out == NULL) goto failed;", 2)
|
|---|
| 432 | self.emit("return 0;", 2)
|
|---|
| 433 | self.emit("}", 1)
|
|---|
| 434 | self.sumTrailer(name)
|
|---|
| 435 |
|
|---|
| 436 | def visitAttributeDeclaration(self, a, name, sum=sum):
|
|---|
| 437 | ctype = get_c_type(a.type)
|
|---|
| 438 | self.emit("%s %s;" % (ctype, a.name), 1)
|
|---|
| 439 |
|
|---|
| 440 | def visitSum(self, sum, name):
|
|---|
| 441 | if is_simple(sum):
|
|---|
| 442 | self.simpleSum(sum, name)
|
|---|
| 443 | else:
|
|---|
| 444 | self.complexSum(sum, name)
|
|---|
| 445 |
|
|---|
| 446 | def visitProduct(self, prod, name):
|
|---|
| 447 | ctype = get_c_type(name)
|
|---|
| 448 | self.emit("int", 0)
|
|---|
| 449 | self.emit("obj2ast_%s(PyObject* obj, %s* out, PyArena* arena)" % (name, ctype), 0)
|
|---|
| 450 | self.emit("{", 0)
|
|---|
| 451 | self.emit("PyObject* tmp = NULL;", 1)
|
|---|
| 452 | for f in prod.fields:
|
|---|
| 453 | self.visitFieldDeclaration(f, name, prod=prod, depth=1)
|
|---|
| 454 | self.emit("", 0)
|
|---|
| 455 | for f in prod.fields:
|
|---|
| 456 | self.visitField(f, name, prod=prod, depth=1)
|
|---|
| 457 | args = [f.name.value for f in prod.fields]
|
|---|
| 458 | self.emit("*out = %s(%s);" % (name, self.buildArgs(args)), 1)
|
|---|
| 459 | self.emit("return 0;", 1)
|
|---|
| 460 | self.emit("failed:", 0)
|
|---|
| 461 | self.emit("Py_XDECREF(tmp);", 1)
|
|---|
| 462 | self.emit("return 1;", 1)
|
|---|
| 463 | self.emit("}", 0)
|
|---|
| 464 | self.emit("", 0)
|
|---|
| 465 |
|
|---|
| 466 | def visitFieldDeclaration(self, field, name, sum=None, prod=None, depth=0):
|
|---|
| 467 | ctype = get_c_type(field.type)
|
|---|
| 468 | if field.seq:
|
|---|
| 469 | if self.isSimpleType(field):
|
|---|
| 470 | self.emit("asdl_int_seq* %s;" % field.name, depth)
|
|---|
| 471 | else:
|
|---|
| 472 | self.emit("asdl_seq* %s;" % field.name, depth)
|
|---|
| 473 | else:
|
|---|
| 474 | ctype = get_c_type(field.type)
|
|---|
| 475 | self.emit("%s %s;" % (ctype, field.name), depth)
|
|---|
| 476 |
|
|---|
| 477 | def isSimpleSum(self, field):
|
|---|
| 478 | # XXX can the members of this list be determined automatically?
|
|---|
| 479 | return field.type.value in ('expr_context', 'boolop', 'operator',
|
|---|
| 480 | 'unaryop', 'cmpop')
|
|---|
| 481 |
|
|---|
| 482 | def isNumeric(self, field):
|
|---|
| 483 | return get_c_type(field.type) in ("int", "bool")
|
|---|
| 484 |
|
|---|
| 485 | def isSimpleType(self, field):
|
|---|
| 486 | return self.isSimpleSum(field) or self.isNumeric(field)
|
|---|
| 487 |
|
|---|
| 488 | def visitField(self, field, name, sum=None, prod=None, depth=0):
|
|---|
| 489 | ctype = get_c_type(field.type)
|
|---|
| 490 | self.emit("if (PyObject_HasAttrString(obj, \"%s\")) {" % field.name, depth)
|
|---|
| 491 | self.emit("int res;", depth+1)
|
|---|
| 492 | if field.seq:
|
|---|
| 493 | self.emit("Py_ssize_t len;", depth+1)
|
|---|
| 494 | self.emit("Py_ssize_t i;", depth+1)
|
|---|
| 495 | self.emit("tmp = PyObject_GetAttrString(obj, \"%s\");" % field.name, depth+1)
|
|---|
| 496 | self.emit("if (tmp == NULL) goto failed;", depth+1)
|
|---|
| 497 | if field.seq:
|
|---|
| 498 | self.emit("if (!PyList_Check(tmp)) {", depth+1)
|
|---|
| 499 | self.emit("PyErr_Format(PyExc_TypeError, \"%s field \\\"%s\\\" must "
|
|---|
| 500 | "be a list, not a %%.200s\", tmp->ob_type->tp_name);" %
|
|---|
| 501 | (name, field.name),
|
|---|
| 502 | depth+2, reflow=False)
|
|---|
| 503 | self.emit("goto failed;", depth+2)
|
|---|
| 504 | self.emit("}", depth+1)
|
|---|
| 505 | self.emit("len = PyList_GET_SIZE(tmp);", depth+1)
|
|---|
| 506 | if self.isSimpleType(field):
|
|---|
| 507 | self.emit("%s = asdl_int_seq_new(len, arena);" % field.name, depth+1)
|
|---|
| 508 | else:
|
|---|
| 509 | self.emit("%s = asdl_seq_new(len, arena);" % field.name, depth+1)
|
|---|
| 510 | self.emit("if (%s == NULL) goto failed;" % field.name, depth+1)
|
|---|
| 511 | self.emit("for (i = 0; i < len; i++) {", depth+1)
|
|---|
| 512 | self.emit("%s value;" % ctype, depth+2)
|
|---|
| 513 | self.emit("res = obj2ast_%s(PyList_GET_ITEM(tmp, i), &value, arena);" %
|
|---|
| 514 | field.type, depth+2, reflow=False)
|
|---|
| 515 | self.emit("if (res != 0) goto failed;", depth+2)
|
|---|
| 516 | self.emit("asdl_seq_SET(%s, i, value);" % field.name, depth+2)
|
|---|
| 517 | self.emit("}", depth+1)
|
|---|
| 518 | else:
|
|---|
| 519 | self.emit("res = obj2ast_%s(tmp, &%s, arena);" %
|
|---|
| 520 | (field.type, field.name), depth+1)
|
|---|
| 521 | self.emit("if (res != 0) goto failed;", depth+1)
|
|---|
| 522 |
|
|---|
| 523 | self.emit("Py_XDECREF(tmp);", depth+1)
|
|---|
| 524 | self.emit("tmp = NULL;", depth+1)
|
|---|
| 525 | self.emit("} else {", depth)
|
|---|
| 526 | if not field.opt:
|
|---|
| 527 | message = "required field \\\"%s\\\" missing from %s" % (field.name, name)
|
|---|
| 528 | format = "PyErr_SetString(PyExc_TypeError, \"%s\");"
|
|---|
| 529 | self.emit(format % message, depth+1, reflow=False)
|
|---|
| 530 | self.emit("return 1;", depth+1)
|
|---|
| 531 | else:
|
|---|
| 532 | if self.isNumeric(field):
|
|---|
| 533 | self.emit("%s = 0;" % field.name, depth+1)
|
|---|
| 534 | elif not self.isSimpleType(field):
|
|---|
| 535 | self.emit("%s = NULL;" % field.name, depth+1)
|
|---|
| 536 | else:
|
|---|
| 537 | raise TypeError("could not determine the default value for %s" % field.name)
|
|---|
| 538 | self.emit("}", depth)
|
|---|
| 539 |
|
|---|
| 540 |
|
|---|
| 541 | class MarshalPrototypeVisitor(PickleVisitor):
|
|---|
| 542 |
|
|---|
| 543 | def prototype(self, sum, name):
|
|---|
| 544 | ctype = get_c_type(name)
|
|---|
| 545 | self.emit("static int marshal_write_%s(PyObject **, int *, %s);"
|
|---|
| 546 | % (name, ctype), 0)
|
|---|
| 547 |
|
|---|
| 548 | visitProduct = visitSum = prototype
|
|---|
| 549 |
|
|---|
| 550 |
|
|---|
| 551 | class PyTypesDeclareVisitor(PickleVisitor):
|
|---|
| 552 |
|
|---|
| 553 | def visitProduct(self, prod, name):
|
|---|
| 554 | self.emit("static PyTypeObject *%s_type;" % name, 0)
|
|---|
| 555 | self.emit("static PyObject* ast2obj_%s(void*);" % name, 0)
|
|---|
| 556 | if prod.fields:
|
|---|
| 557 | self.emit("static char *%s_fields[]={" % name,0)
|
|---|
| 558 | for f in prod.fields:
|
|---|
| 559 | self.emit('"%s",' % f.name, 1)
|
|---|
| 560 | self.emit("};", 0)
|
|---|
| 561 |
|
|---|
| 562 | def visitSum(self, sum, name):
|
|---|
| 563 | self.emit("static PyTypeObject *%s_type;" % name, 0)
|
|---|
| 564 | if sum.attributes:
|
|---|
| 565 | self.emit("static char *%s_attributes[] = {" % name, 0)
|
|---|
| 566 | for a in sum.attributes:
|
|---|
| 567 | self.emit('"%s",' % a.name, 1)
|
|---|
| 568 | self.emit("};", 0)
|
|---|
| 569 | ptype = "void*"
|
|---|
| 570 | if is_simple(sum):
|
|---|
| 571 | ptype = get_c_type(name)
|
|---|
| 572 | tnames = []
|
|---|
| 573 | for t in sum.types:
|
|---|
| 574 | tnames.append(str(t.name)+"_singleton")
|
|---|
| 575 | tnames = ", *".join(tnames)
|
|---|
| 576 | self.emit("static PyObject *%s;" % tnames, 0)
|
|---|
| 577 | self.emit("static PyObject* ast2obj_%s(%s);" % (name, ptype), 0)
|
|---|
| 578 | for t in sum.types:
|
|---|
| 579 | self.visitConstructor(t, name)
|
|---|
| 580 |
|
|---|
| 581 | def visitConstructor(self, cons, name):
|
|---|
| 582 | self.emit("static PyTypeObject *%s_type;" % cons.name, 0)
|
|---|
| 583 | if cons.fields:
|
|---|
| 584 | self.emit("static char *%s_fields[]={" % cons.name, 0)
|
|---|
| 585 | for t in cons.fields:
|
|---|
| 586 | self.emit('"%s",' % t.name, 1)
|
|---|
| 587 | self.emit("};",0)
|
|---|
| 588 |
|
|---|
| 589 | class PyTypesVisitor(PickleVisitor):
|
|---|
| 590 |
|
|---|
| 591 | def visitModule(self, mod):
|
|---|
| 592 | self.emit("""
|
|---|
| 593 | static int
|
|---|
| 594 | ast_type_init(PyObject *self, PyObject *args, PyObject *kw)
|
|---|
| 595 | {
|
|---|
| 596 | Py_ssize_t i, numfields = 0;
|
|---|
| 597 | int res = -1;
|
|---|
| 598 | PyObject *key, *value, *fields;
|
|---|
| 599 | fields = PyObject_GetAttrString((PyObject*)Py_TYPE(self), "_fields");
|
|---|
| 600 | if (!fields)
|
|---|
| 601 | PyErr_Clear();
|
|---|
| 602 | if (fields) {
|
|---|
| 603 | numfields = PySequence_Size(fields);
|
|---|
| 604 | if (numfields == -1)
|
|---|
| 605 | goto cleanup;
|
|---|
| 606 | }
|
|---|
| 607 | res = 0; /* if no error occurs, this stays 0 to the end */
|
|---|
| 608 | if (PyTuple_GET_SIZE(args) > 0) {
|
|---|
| 609 | if (numfields != PyTuple_GET_SIZE(args)) {
|
|---|
| 610 | PyErr_Format(PyExc_TypeError, "%.400s constructor takes %s"
|
|---|
| 611 | "%zd positional argument%s",
|
|---|
| 612 | Py_TYPE(self)->tp_name,
|
|---|
| 613 | numfields == 0 ? "" : "either 0 or ",
|
|---|
| 614 | numfields, numfields == 1 ? "" : "s");
|
|---|
| 615 | res = -1;
|
|---|
| 616 | goto cleanup;
|
|---|
| 617 | }
|
|---|
| 618 | for (i = 0; i < PyTuple_GET_SIZE(args); i++) {
|
|---|
| 619 | /* cannot be reached when fields is NULL */
|
|---|
| 620 | PyObject *name = PySequence_GetItem(fields, i);
|
|---|
| 621 | if (!name) {
|
|---|
| 622 | res = -1;
|
|---|
| 623 | goto cleanup;
|
|---|
| 624 | }
|
|---|
| 625 | res = PyObject_SetAttr(self, name, PyTuple_GET_ITEM(args, i));
|
|---|
| 626 | Py_DECREF(name);
|
|---|
| 627 | if (res < 0)
|
|---|
| 628 | goto cleanup;
|
|---|
| 629 | }
|
|---|
| 630 | }
|
|---|
| 631 | if (kw) {
|
|---|
| 632 | i = 0; /* needed by PyDict_Next */
|
|---|
| 633 | while (PyDict_Next(kw, &i, &key, &value)) {
|
|---|
| 634 | res = PyObject_SetAttr(self, key, value);
|
|---|
| 635 | if (res < 0)
|
|---|
| 636 | goto cleanup;
|
|---|
| 637 | }
|
|---|
| 638 | }
|
|---|
| 639 | cleanup:
|
|---|
| 640 | Py_XDECREF(fields);
|
|---|
| 641 | return res;
|
|---|
| 642 | }
|
|---|
| 643 |
|
|---|
| 644 | /* Pickling support */
|
|---|
| 645 | static PyObject *
|
|---|
| 646 | ast_type_reduce(PyObject *self, PyObject *unused)
|
|---|
| 647 | {
|
|---|
| 648 | PyObject *res;
|
|---|
| 649 | PyObject *dict = PyObject_GetAttrString(self, "__dict__");
|
|---|
| 650 | if (dict == NULL) {
|
|---|
| 651 | if (PyErr_ExceptionMatches(PyExc_AttributeError))
|
|---|
| 652 | PyErr_Clear();
|
|---|
| 653 | else
|
|---|
| 654 | return NULL;
|
|---|
| 655 | }
|
|---|
| 656 | if (dict) {
|
|---|
| 657 | res = Py_BuildValue("O()O", Py_TYPE(self), dict);
|
|---|
| 658 | Py_DECREF(dict);
|
|---|
| 659 | return res;
|
|---|
| 660 | }
|
|---|
| 661 | return Py_BuildValue("O()", Py_TYPE(self));
|
|---|
| 662 | }
|
|---|
| 663 |
|
|---|
| 664 | static PyMethodDef ast_type_methods[] = {
|
|---|
| 665 | {"__reduce__", ast_type_reduce, METH_NOARGS, NULL},
|
|---|
| 666 | {NULL}
|
|---|
| 667 | };
|
|---|
| 668 |
|
|---|
| 669 | static PyTypeObject AST_type = {
|
|---|
| 670 | PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|---|
| 671 | "_ast.AST",
|
|---|
| 672 | sizeof(PyObject),
|
|---|
| 673 | 0,
|
|---|
| 674 | 0, /* tp_dealloc */
|
|---|
| 675 | 0, /* tp_print */
|
|---|
| 676 | 0, /* tp_getattr */
|
|---|
| 677 | 0, /* tp_setattr */
|
|---|
| 678 | 0, /* tp_compare */
|
|---|
| 679 | 0, /* tp_repr */
|
|---|
| 680 | 0, /* tp_as_number */
|
|---|
| 681 | 0, /* tp_as_sequence */
|
|---|
| 682 | 0, /* tp_as_mapping */
|
|---|
| 683 | 0, /* tp_hash */
|
|---|
| 684 | 0, /* tp_call */
|
|---|
| 685 | 0, /* tp_str */
|
|---|
| 686 | PyObject_GenericGetAttr, /* tp_getattro */
|
|---|
| 687 | PyObject_GenericSetAttr, /* tp_setattro */
|
|---|
| 688 | 0, /* tp_as_buffer */
|
|---|
| 689 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
|
|---|
| 690 | 0, /* tp_doc */
|
|---|
| 691 | 0, /* tp_traverse */
|
|---|
| 692 | 0, /* tp_clear */
|
|---|
| 693 | 0, /* tp_richcompare */
|
|---|
| 694 | 0, /* tp_weaklistoffset */
|
|---|
| 695 | 0, /* tp_iter */
|
|---|
| 696 | 0, /* tp_iternext */
|
|---|
| 697 | ast_type_methods, /* tp_methods */
|
|---|
| 698 | 0, /* tp_members */
|
|---|
| 699 | 0, /* tp_getset */
|
|---|
| 700 | 0, /* tp_base */
|
|---|
| 701 | 0, /* tp_dict */
|
|---|
| 702 | 0, /* tp_descr_get */
|
|---|
| 703 | 0, /* tp_descr_set */
|
|---|
| 704 | 0, /* tp_dictoffset */
|
|---|
| 705 | (initproc)ast_type_init, /* tp_init */
|
|---|
| 706 | PyType_GenericAlloc, /* tp_alloc */
|
|---|
| 707 | PyType_GenericNew, /* tp_new */
|
|---|
| 708 | PyObject_Del, /* tp_free */
|
|---|
| 709 | };
|
|---|
| 710 |
|
|---|
| 711 |
|
|---|
| 712 | static PyTypeObject* make_type(char *type, PyTypeObject* base, char**fields, int num_fields)
|
|---|
| 713 | {
|
|---|
| 714 | PyObject *fnames, *result;
|
|---|
| 715 | int i;
|
|---|
| 716 | fnames = PyTuple_New(num_fields);
|
|---|
| 717 | if (!fnames) return NULL;
|
|---|
| 718 | for (i = 0; i < num_fields; i++) {
|
|---|
| 719 | PyObject *field = PyString_FromString(fields[i]);
|
|---|
| 720 | if (!field) {
|
|---|
| 721 | Py_DECREF(fnames);
|
|---|
| 722 | return NULL;
|
|---|
| 723 | }
|
|---|
| 724 | PyTuple_SET_ITEM(fnames, i, field);
|
|---|
| 725 | }
|
|---|
| 726 | result = PyObject_CallFunction((PyObject*)&PyType_Type, "s(O){sOss}",
|
|---|
| 727 | type, base, "_fields", fnames, "__module__", "_ast");
|
|---|
| 728 | Py_DECREF(fnames);
|
|---|
| 729 | return (PyTypeObject*)result;
|
|---|
| 730 | }
|
|---|
| 731 |
|
|---|
| 732 | static int add_attributes(PyTypeObject* type, char**attrs, int num_fields)
|
|---|
| 733 | {
|
|---|
| 734 | int i, result;
|
|---|
| 735 | PyObject *s, *l = PyTuple_New(num_fields);
|
|---|
| 736 | if (!l)
|
|---|
| 737 | return 0;
|
|---|
| 738 | for (i = 0; i < num_fields; i++) {
|
|---|
| 739 | s = PyString_FromString(attrs[i]);
|
|---|
| 740 | if (!s) {
|
|---|
| 741 | Py_DECREF(l);
|
|---|
| 742 | return 0;
|
|---|
| 743 | }
|
|---|
| 744 | PyTuple_SET_ITEM(l, i, s);
|
|---|
| 745 | }
|
|---|
| 746 | result = PyObject_SetAttrString((PyObject*)type, "_attributes", l) >= 0;
|
|---|
| 747 | Py_DECREF(l);
|
|---|
| 748 | return result;
|
|---|
| 749 | }
|
|---|
| 750 |
|
|---|
| 751 | /* Conversion AST -> Python */
|
|---|
| 752 |
|
|---|
| 753 | static PyObject* ast2obj_list(asdl_seq *seq, PyObject* (*func)(void*))
|
|---|
| 754 | {
|
|---|
| 755 | int i, n = asdl_seq_LEN(seq);
|
|---|
| 756 | PyObject *result = PyList_New(n);
|
|---|
| 757 | PyObject *value;
|
|---|
| 758 | if (!result)
|
|---|
| 759 | return NULL;
|
|---|
| 760 | for (i = 0; i < n; i++) {
|
|---|
| 761 | value = func(asdl_seq_GET(seq, i));
|
|---|
| 762 | if (!value) {
|
|---|
| 763 | Py_DECREF(result);
|
|---|
| 764 | return NULL;
|
|---|
| 765 | }
|
|---|
| 766 | PyList_SET_ITEM(result, i, value);
|
|---|
| 767 | }
|
|---|
| 768 | return result;
|
|---|
| 769 | }
|
|---|
| 770 |
|
|---|
| 771 | static PyObject* ast2obj_object(void *o)
|
|---|
| 772 | {
|
|---|
| 773 | if (!o)
|
|---|
| 774 | o = Py_None;
|
|---|
| 775 | Py_INCREF((PyObject*)o);
|
|---|
| 776 | return (PyObject*)o;
|
|---|
| 777 | }
|
|---|
| 778 | #define ast2obj_identifier ast2obj_object
|
|---|
| 779 | #define ast2obj_string ast2obj_object
|
|---|
| 780 | static PyObject* ast2obj_bool(bool b)
|
|---|
| 781 | {
|
|---|
| 782 | return PyBool_FromLong(b);
|
|---|
| 783 | }
|
|---|
| 784 |
|
|---|
| 785 | static PyObject* ast2obj_int(long b)
|
|---|
| 786 | {
|
|---|
| 787 | return PyInt_FromLong(b);
|
|---|
| 788 | }
|
|---|
| 789 |
|
|---|
| 790 | /* Conversion Python -> AST */
|
|---|
| 791 |
|
|---|
| 792 | static int obj2ast_object(PyObject* obj, PyObject** out, PyArena* arena)
|
|---|
| 793 | {
|
|---|
| 794 | if (obj == Py_None)
|
|---|
| 795 | obj = NULL;
|
|---|
| 796 | if (obj)
|
|---|
| 797 | PyArena_AddPyObject(arena, obj);
|
|---|
| 798 | Py_XINCREF(obj);
|
|---|
| 799 | *out = obj;
|
|---|
| 800 | return 0;
|
|---|
| 801 | }
|
|---|
| 802 |
|
|---|
| 803 | static int obj2ast_identifier(PyObject* obj, PyObject** out, PyArena* arena)
|
|---|
| 804 | {
|
|---|
| 805 | if (!PyString_CheckExact(obj) && obj != Py_None) {
|
|---|
| 806 | PyErr_Format(PyExc_TypeError,
|
|---|
| 807 | "AST identifier must be of type str");
|
|---|
| 808 | return 1;
|
|---|
| 809 | }
|
|---|
| 810 | return obj2ast_object(obj, out, arena);
|
|---|
| 811 | }
|
|---|
| 812 |
|
|---|
| 813 | static int obj2ast_string(PyObject* obj, PyObject** out, PyArena* arena)
|
|---|
| 814 | {
|
|---|
| 815 | if (!PyString_CheckExact(obj) && !PyUnicode_CheckExact(obj)) {
|
|---|
| 816 | PyErr_SetString(PyExc_TypeError,
|
|---|
| 817 | "AST string must be of type str or unicode");
|
|---|
| 818 | return 1;
|
|---|
| 819 | }
|
|---|
| 820 | return obj2ast_object(obj, out, arena);
|
|---|
| 821 | }
|
|---|
| 822 |
|
|---|
| 823 | static int obj2ast_int(PyObject* obj, int* out, PyArena* arena)
|
|---|
| 824 | {
|
|---|
| 825 | int i;
|
|---|
| 826 | if (!PyInt_Check(obj) && !PyLong_Check(obj)) {
|
|---|
| 827 | PyObject *s = PyObject_Repr(obj);
|
|---|
| 828 | if (s == NULL) return 1;
|
|---|
| 829 | PyErr_Format(PyExc_ValueError, "invalid integer value: %.400s",
|
|---|
| 830 | PyString_AS_STRING(s));
|
|---|
| 831 | Py_DECREF(s);
|
|---|
| 832 | return 1;
|
|---|
| 833 | }
|
|---|
| 834 |
|
|---|
| 835 | i = (int)PyLong_AsLong(obj);
|
|---|
| 836 | if (i == -1 && PyErr_Occurred())
|
|---|
| 837 | return 1;
|
|---|
| 838 | *out = i;
|
|---|
| 839 | return 0;
|
|---|
| 840 | }
|
|---|
| 841 |
|
|---|
| 842 | static int obj2ast_bool(PyObject* obj, bool* out, PyArena* arena)
|
|---|
| 843 | {
|
|---|
| 844 | if (!PyBool_Check(obj)) {
|
|---|
| 845 | PyObject *s = PyObject_Repr(obj);
|
|---|
| 846 | if (s == NULL) return 1;
|
|---|
| 847 | PyErr_Format(PyExc_ValueError, "invalid boolean value: %.400s",
|
|---|
| 848 | PyString_AS_STRING(s));
|
|---|
| 849 | Py_DECREF(s);
|
|---|
| 850 | return 1;
|
|---|
| 851 | }
|
|---|
| 852 |
|
|---|
| 853 | *out = (obj == Py_True);
|
|---|
| 854 | return 0;
|
|---|
| 855 | }
|
|---|
| 856 |
|
|---|
| 857 | static int add_ast_fields(void)
|
|---|
| 858 | {
|
|---|
| 859 | PyObject *empty_tuple, *d;
|
|---|
| 860 | if (PyType_Ready(&AST_type) < 0)
|
|---|
| 861 | return -1;
|
|---|
| 862 | d = AST_type.tp_dict;
|
|---|
| 863 | empty_tuple = PyTuple_New(0);
|
|---|
| 864 | if (!empty_tuple ||
|
|---|
| 865 | PyDict_SetItemString(d, "_fields", empty_tuple) < 0 ||
|
|---|
| 866 | PyDict_SetItemString(d, "_attributes", empty_tuple) < 0) {
|
|---|
| 867 | Py_XDECREF(empty_tuple);
|
|---|
| 868 | return -1;
|
|---|
| 869 | }
|
|---|
| 870 | Py_DECREF(empty_tuple);
|
|---|
| 871 | return 0;
|
|---|
| 872 | }
|
|---|
| 873 |
|
|---|
| 874 | """, 0, reflow=False)
|
|---|
| 875 |
|
|---|
| 876 | self.emit("static int init_types(void)",0)
|
|---|
| 877 | self.emit("{", 0)
|
|---|
| 878 | self.emit("static int initialized;", 1)
|
|---|
| 879 | self.emit("if (initialized) return 1;", 1)
|
|---|
| 880 | self.emit("if (add_ast_fields() < 0) return 0;", 1)
|
|---|
| 881 | for dfn in mod.dfns:
|
|---|
| 882 | self.visit(dfn)
|
|---|
| 883 | self.emit("initialized = 1;", 1)
|
|---|
| 884 | self.emit("return 1;", 1);
|
|---|
| 885 | self.emit("}", 0)
|
|---|
| 886 |
|
|---|
| 887 | def visitProduct(self, prod, name):
|
|---|
| 888 | if prod.fields:
|
|---|
| 889 | fields = name.value+"_fields"
|
|---|
| 890 | else:
|
|---|
| 891 | fields = "NULL"
|
|---|
| 892 | self.emit('%s_type = make_type("%s", &AST_type, %s, %d);' %
|
|---|
| 893 | (name, name, fields, len(prod.fields)), 1)
|
|---|
| 894 | self.emit("if (!%s_type) return 0;" % name, 1)
|
|---|
| 895 |
|
|---|
| 896 | def visitSum(self, sum, name):
|
|---|
| 897 | self.emit('%s_type = make_type("%s", &AST_type, NULL, 0);' %
|
|---|
| 898 | (name, name), 1)
|
|---|
| 899 | self.emit("if (!%s_type) return 0;" % name, 1)
|
|---|
| 900 | if sum.attributes:
|
|---|
| 901 | self.emit("if (!add_attributes(%s_type, %s_attributes, %d)) return 0;" %
|
|---|
| 902 | (name, name, len(sum.attributes)), 1)
|
|---|
| 903 | else:
|
|---|
| 904 | self.emit("if (!add_attributes(%s_type, NULL, 0)) return 0;" % name, 1)
|
|---|
| 905 | simple = is_simple(sum)
|
|---|
| 906 | for t in sum.types:
|
|---|
| 907 | self.visitConstructor(t, name, simple)
|
|---|
| 908 |
|
|---|
| 909 | def visitConstructor(self, cons, name, simple):
|
|---|
| 910 | if cons.fields:
|
|---|
| 911 | fields = cons.name.value+"_fields"
|
|---|
| 912 | else:
|
|---|
| 913 | fields = "NULL"
|
|---|
| 914 | self.emit('%s_type = make_type("%s", %s_type, %s, %d);' %
|
|---|
| 915 | (cons.name, cons.name, name, fields, len(cons.fields)), 1)
|
|---|
| 916 | self.emit("if (!%s_type) return 0;" % cons.name, 1)
|
|---|
| 917 | if simple:
|
|---|
| 918 | self.emit("%s_singleton = PyType_GenericNew(%s_type, NULL, NULL);" %
|
|---|
| 919 | (cons.name, cons.name), 1)
|
|---|
| 920 | self.emit("if (!%s_singleton) return 0;" % cons.name, 1)
|
|---|
| 921 |
|
|---|
| 922 |
|
|---|
| 923 | class ASTModuleVisitor(PickleVisitor):
|
|---|
| 924 |
|
|---|
| 925 | def visitModule(self, mod):
|
|---|
| 926 | self.emit("PyMODINIT_FUNC", 0)
|
|---|
| 927 | self.emit("init_ast(void)", 0)
|
|---|
| 928 | self.emit("{", 0)
|
|---|
| 929 | self.emit("PyObject *m, *d;", 1)
|
|---|
| 930 | self.emit("if (!init_types()) return;", 1)
|
|---|
| 931 | self.emit('m = Py_InitModule3("_ast", NULL, NULL);', 1)
|
|---|
| 932 | self.emit("if (!m) return;", 1)
|
|---|
| 933 | self.emit("d = PyModule_GetDict(m);", 1)
|
|---|
| 934 | self.emit('if (PyDict_SetItemString(d, "AST", (PyObject*)&AST_type) < 0) return;', 1)
|
|---|
| 935 | self.emit('if (PyModule_AddIntConstant(m, "PyCF_ONLY_AST", PyCF_ONLY_AST) < 0)', 1)
|
|---|
| 936 | self.emit("return;", 2)
|
|---|
| 937 | # Value of version: "$Revision$"
|
|---|
| 938 | self.emit('if (PyModule_AddStringConstant(m, "__version__", "%s") < 0)'
|
|---|
| 939 | % mod.version, 1)
|
|---|
| 940 | self.emit("return;", 2)
|
|---|
| 941 | for dfn in mod.dfns:
|
|---|
| 942 | self.visit(dfn)
|
|---|
| 943 | self.emit("}", 0)
|
|---|
| 944 |
|
|---|
| 945 | def visitProduct(self, prod, name):
|
|---|
| 946 | self.addObj(name)
|
|---|
| 947 |
|
|---|
| 948 | def visitSum(self, sum, name):
|
|---|
| 949 | self.addObj(name)
|
|---|
| 950 | for t in sum.types:
|
|---|
| 951 | self.visitConstructor(t, name)
|
|---|
| 952 |
|
|---|
| 953 | def visitConstructor(self, cons, name):
|
|---|
| 954 | self.addObj(cons.name)
|
|---|
| 955 |
|
|---|
| 956 | def addObj(self, name):
|
|---|
| 957 | self.emit('if (PyDict_SetItemString(d, "%s", (PyObject*)%s_type) < 0) return;' % (name, name), 1)
|
|---|
| 958 |
|
|---|
| 959 |
|
|---|
| 960 | _SPECIALIZED_SEQUENCES = ('stmt', 'expr')
|
|---|
| 961 |
|
|---|
| 962 | def find_sequence(fields, doing_specialization):
|
|---|
| 963 | """Return True if any field uses a sequence."""
|
|---|
| 964 | for f in fields:
|
|---|
| 965 | if f.seq:
|
|---|
| 966 | if not doing_specialization:
|
|---|
| 967 | return True
|
|---|
| 968 | if str(f.type) not in _SPECIALIZED_SEQUENCES:
|
|---|
| 969 | return True
|
|---|
| 970 | return False
|
|---|
| 971 |
|
|---|
| 972 | def has_sequence(types, doing_specialization):
|
|---|
| 973 | for t in types:
|
|---|
| 974 | if find_sequence(t.fields, doing_specialization):
|
|---|
| 975 | return True
|
|---|
| 976 | return False
|
|---|
| 977 |
|
|---|
| 978 |
|
|---|
| 979 | class StaticVisitor(PickleVisitor):
|
|---|
| 980 | CODE = '''Very simple, always emit this static code. Override CODE'''
|
|---|
| 981 |
|
|---|
| 982 | def visit(self, object):
|
|---|
| 983 | self.emit(self.CODE, 0, reflow=False)
|
|---|
| 984 |
|
|---|
| 985 |
|
|---|
| 986 | class ObjVisitor(PickleVisitor):
|
|---|
| 987 |
|
|---|
| 988 | def func_begin(self, name):
|
|---|
| 989 | ctype = get_c_type(name)
|
|---|
| 990 | self.emit("PyObject*", 0)
|
|---|
| 991 | self.emit("ast2obj_%s(void* _o)" % (name), 0)
|
|---|
| 992 | self.emit("{", 0)
|
|---|
| 993 | self.emit("%s o = (%s)_o;" % (ctype, ctype), 1)
|
|---|
| 994 | self.emit("PyObject *result = NULL, *value = NULL;", 1)
|
|---|
| 995 | self.emit('if (!o) {', 1)
|
|---|
| 996 | self.emit("Py_INCREF(Py_None);", 2)
|
|---|
| 997 | self.emit('return Py_None;', 2)
|
|---|
| 998 | self.emit("}", 1)
|
|---|
| 999 | self.emit('', 0)
|
|---|
| 1000 |
|
|---|
| 1001 | def func_end(self):
|
|---|
| 1002 | self.emit("return result;", 1)
|
|---|
| 1003 | self.emit("failed:", 0)
|
|---|
| 1004 | self.emit("Py_XDECREF(value);", 1)
|
|---|
| 1005 | self.emit("Py_XDECREF(result);", 1)
|
|---|
| 1006 | self.emit("return NULL;", 1)
|
|---|
| 1007 | self.emit("}", 0)
|
|---|
| 1008 | self.emit("", 0)
|
|---|
| 1009 |
|
|---|
| 1010 | def visitSum(self, sum, name):
|
|---|
| 1011 | if is_simple(sum):
|
|---|
| 1012 | self.simpleSum(sum, name)
|
|---|
| 1013 | return
|
|---|
| 1014 | self.func_begin(name)
|
|---|
| 1015 | self.emit("switch (o->kind) {", 1)
|
|---|
| 1016 | for i in range(len(sum.types)):
|
|---|
| 1017 | t = sum.types[i]
|
|---|
| 1018 | self.visitConstructor(t, i + 1, name)
|
|---|
| 1019 | self.emit("}", 1)
|
|---|
| 1020 | for a in sum.attributes:
|
|---|
| 1021 | self.emit("value = ast2obj_%s(o->%s);" % (a.type, a.name), 1)
|
|---|
| 1022 | self.emit("if (!value) goto failed;", 1)
|
|---|
| 1023 | self.emit('if (PyObject_SetAttrString(result, "%s", value) < 0)' % a.name, 1)
|
|---|
| 1024 | self.emit('goto failed;', 2)
|
|---|
| 1025 | self.emit('Py_DECREF(value);', 1)
|
|---|
| 1026 | self.func_end()
|
|---|
| 1027 |
|
|---|
| 1028 | def simpleSum(self, sum, name):
|
|---|
| 1029 | self.emit("PyObject* ast2obj_%s(%s_ty o)" % (name, name), 0)
|
|---|
| 1030 | self.emit("{", 0)
|
|---|
| 1031 | self.emit("switch(o) {", 1)
|
|---|
| 1032 | for t in sum.types:
|
|---|
| 1033 | self.emit("case %s:" % t.name, 2)
|
|---|
| 1034 | self.emit("Py_INCREF(%s_singleton);" % t.name, 3)
|
|---|
| 1035 | self.emit("return %s_singleton;" % t.name, 3)
|
|---|
| 1036 | self.emit("default:", 2)
|
|---|
| 1037 | self.emit('/* should never happen, but just in case ... */', 3)
|
|---|
| 1038 | code = "PyErr_Format(PyExc_SystemError, \"unknown %s found\");" % name
|
|---|
| 1039 | self.emit(code, 3, reflow=False)
|
|---|
| 1040 | self.emit("return NULL;", 3)
|
|---|
| 1041 | self.emit("}", 1)
|
|---|
| 1042 | self.emit("}", 0)
|
|---|
| 1043 |
|
|---|
| 1044 | def visitProduct(self, prod, name):
|
|---|
| 1045 | self.func_begin(name)
|
|---|
| 1046 | self.emit("result = PyType_GenericNew(%s_type, NULL, NULL);" % name, 1);
|
|---|
| 1047 | self.emit("if (!result) return NULL;", 1)
|
|---|
| 1048 | for field in prod.fields:
|
|---|
| 1049 | self.visitField(field, name, 1, True)
|
|---|
| 1050 | self.func_end()
|
|---|
| 1051 |
|
|---|
| 1052 | def visitConstructor(self, cons, enum, name):
|
|---|
| 1053 | self.emit("case %s_kind:" % cons.name, 1)
|
|---|
| 1054 | self.emit("result = PyType_GenericNew(%s_type, NULL, NULL);" % cons.name, 2);
|
|---|
| 1055 | self.emit("if (!result) goto failed;", 2)
|
|---|
| 1056 | for f in cons.fields:
|
|---|
| 1057 | self.visitField(f, cons.name, 2, False)
|
|---|
| 1058 | self.emit("break;", 2)
|
|---|
| 1059 |
|
|---|
| 1060 | def visitField(self, field, name, depth, product):
|
|---|
| 1061 | def emit(s, d):
|
|---|
| 1062 | self.emit(s, depth + d)
|
|---|
| 1063 | if product:
|
|---|
| 1064 | value = "o->%s" % field.name
|
|---|
| 1065 | else:
|
|---|
| 1066 | value = "o->v.%s.%s" % (name, field.name)
|
|---|
| 1067 | self.set(field, value, depth)
|
|---|
| 1068 | emit("if (!value) goto failed;", 0)
|
|---|
| 1069 | emit('if (PyObject_SetAttrString(result, "%s", value) == -1)' % field.name, 0)
|
|---|
| 1070 | emit("goto failed;", 1)
|
|---|
| 1071 | emit("Py_DECREF(value);", 0)
|
|---|
| 1072 |
|
|---|
| 1073 | def emitSeq(self, field, value, depth, emit):
|
|---|
| 1074 | emit("seq = %s;" % value, 0)
|
|---|
| 1075 | emit("n = asdl_seq_LEN(seq);", 0)
|
|---|
| 1076 | emit("value = PyList_New(n);", 0)
|
|---|
| 1077 | emit("if (!value) goto failed;", 0)
|
|---|
| 1078 | emit("for (i = 0; i < n; i++) {", 0)
|
|---|
| 1079 | self.set("value", field, "asdl_seq_GET(seq, i)", depth + 1)
|
|---|
| 1080 | emit("if (!value1) goto failed;", 1)
|
|---|
| 1081 | emit("PyList_SET_ITEM(value, i, value1);", 1)
|
|---|
| 1082 | emit("value1 = NULL;", 1)
|
|---|
| 1083 | emit("}", 0)
|
|---|
| 1084 |
|
|---|
| 1085 | def set(self, field, value, depth):
|
|---|
| 1086 | if field.seq:
|
|---|
| 1087 | # XXX should really check for is_simple, but that requires a symbol table
|
|---|
| 1088 | if field.type.value == "cmpop":
|
|---|
| 1089 | # While the sequence elements are stored as void*,
|
|---|
| 1090 | # ast2obj_cmpop expects an enum
|
|---|
| 1091 | self.emit("{", depth)
|
|---|
| 1092 | self.emit("int i, n = asdl_seq_LEN(%s);" % value, depth+1)
|
|---|
| 1093 | self.emit("value = PyList_New(n);", depth+1)
|
|---|
| 1094 | self.emit("if (!value) goto failed;", depth+1)
|
|---|
| 1095 | self.emit("for(i = 0; i < n; i++)", depth+1)
|
|---|
| 1096 | # This cannot fail, so no need for error handling
|
|---|
| 1097 | self.emit("PyList_SET_ITEM(value, i, ast2obj_cmpop((cmpop_ty)asdl_seq_GET(%s, i)));" % value,
|
|---|
| 1098 | depth+2, reflow=False)
|
|---|
| 1099 | self.emit("}", depth)
|
|---|
| 1100 | else:
|
|---|
| 1101 | self.emit("value = ast2obj_list(%s, ast2obj_%s);" % (value, field.type), depth)
|
|---|
| 1102 | else:
|
|---|
| 1103 | ctype = get_c_type(field.type)
|
|---|
| 1104 | self.emit("value = ast2obj_%s(%s);" % (field.type, value), depth, reflow=False)
|
|---|
| 1105 |
|
|---|
| 1106 |
|
|---|
| 1107 | class PartingShots(StaticVisitor):
|
|---|
| 1108 |
|
|---|
| 1109 | CODE = """
|
|---|
| 1110 | PyObject* PyAST_mod2obj(mod_ty t)
|
|---|
| 1111 | {
|
|---|
| 1112 | init_types();
|
|---|
| 1113 | return ast2obj_mod(t);
|
|---|
| 1114 | }
|
|---|
| 1115 |
|
|---|
| 1116 | /* mode is 0 for "exec", 1 for "eval" and 2 for "single" input */
|
|---|
| 1117 | mod_ty PyAST_obj2mod(PyObject* ast, PyArena* arena, int mode)
|
|---|
| 1118 | {
|
|---|
| 1119 | mod_ty res;
|
|---|
| 1120 | PyObject *req_type[3];
|
|---|
| 1121 | char *req_name[3];
|
|---|
| 1122 | int isinstance;
|
|---|
| 1123 |
|
|---|
| 1124 | req_type[0] = (PyObject*)Module_type;
|
|---|
| 1125 | req_type[1] = (PyObject*)Expression_type;
|
|---|
| 1126 | req_type[2] = (PyObject*)Interactive_type;
|
|---|
| 1127 |
|
|---|
| 1128 | req_name[0] = "Module";
|
|---|
| 1129 | req_name[1] = "Expression";
|
|---|
| 1130 | req_name[2] = "Interactive";
|
|---|
| 1131 |
|
|---|
| 1132 | assert(0 <= mode && mode <= 2);
|
|---|
| 1133 |
|
|---|
| 1134 | init_types();
|
|---|
| 1135 |
|
|---|
| 1136 | isinstance = PyObject_IsInstance(ast, req_type[mode]);
|
|---|
| 1137 | if (isinstance == -1)
|
|---|
| 1138 | return NULL;
|
|---|
| 1139 | if (!isinstance) {
|
|---|
| 1140 | PyErr_Format(PyExc_TypeError, "expected %s node, got %.400s",
|
|---|
| 1141 | req_name[mode], Py_TYPE(ast)->tp_name);
|
|---|
| 1142 | return NULL;
|
|---|
| 1143 | }
|
|---|
| 1144 | if (obj2ast_mod(ast, &res, arena) != 0)
|
|---|
| 1145 | return NULL;
|
|---|
| 1146 | else
|
|---|
| 1147 | return res;
|
|---|
| 1148 | }
|
|---|
| 1149 |
|
|---|
| 1150 | int PyAST_Check(PyObject* obj)
|
|---|
| 1151 | {
|
|---|
| 1152 | init_types();
|
|---|
| 1153 | return PyObject_IsInstance(obj, (PyObject*)&AST_type);
|
|---|
| 1154 | }
|
|---|
| 1155 | """
|
|---|
| 1156 |
|
|---|
| 1157 | class ChainOfVisitors:
|
|---|
| 1158 | def __init__(self, *visitors):
|
|---|
| 1159 | self.visitors = visitors
|
|---|
| 1160 |
|
|---|
| 1161 | def visit(self, object):
|
|---|
| 1162 | for v in self.visitors:
|
|---|
| 1163 | v.visit(object)
|
|---|
| 1164 | v.emit("", 0)
|
|---|
| 1165 |
|
|---|
| 1166 | common_msg = "/* File automatically generated by %s. */\n\n"
|
|---|
| 1167 |
|
|---|
| 1168 | c_file_msg = """
|
|---|
| 1169 | /*
|
|---|
| 1170 | __version__ %s.
|
|---|
| 1171 |
|
|---|
| 1172 | This module must be committed separately after each AST grammar change;
|
|---|
| 1173 | The __version__ number is set to the revision number of the commit
|
|---|
| 1174 | containing the grammar change.
|
|---|
| 1175 | */
|
|---|
| 1176 |
|
|---|
| 1177 | """
|
|---|
| 1178 |
|
|---|
| 1179 | def main(srcfile):
|
|---|
| 1180 | argv0 = sys.argv[0]
|
|---|
| 1181 | components = argv0.split(os.sep)
|
|---|
| 1182 | argv0 = os.sep.join(components[-2:])
|
|---|
| 1183 | auto_gen_msg = common_msg % argv0
|
|---|
| 1184 | mod = asdl.parse(srcfile)
|
|---|
| 1185 | mod.version = "82160"
|
|---|
| 1186 | if not asdl.check(mod):
|
|---|
| 1187 | sys.exit(1)
|
|---|
| 1188 | if INC_DIR:
|
|---|
| 1189 | p = "%s/%s-ast.h" % (INC_DIR, mod.name)
|
|---|
| 1190 | f = open(p, "wb")
|
|---|
| 1191 | f.write(auto_gen_msg)
|
|---|
| 1192 | f.write('#include "asdl.h"\n\n')
|
|---|
| 1193 | c = ChainOfVisitors(TypeDefVisitor(f),
|
|---|
| 1194 | StructVisitor(f),
|
|---|
| 1195 | PrototypeVisitor(f),
|
|---|
| 1196 | )
|
|---|
| 1197 | c.visit(mod)
|
|---|
| 1198 | f.write("PyObject* PyAST_mod2obj(mod_ty t);\n")
|
|---|
| 1199 | f.write("mod_ty PyAST_obj2mod(PyObject* ast, PyArena* arena, int mode);\n")
|
|---|
| 1200 | f.write("int PyAST_Check(PyObject* obj);\n")
|
|---|
| 1201 | f.close()
|
|---|
| 1202 |
|
|---|
| 1203 | if SRC_DIR:
|
|---|
| 1204 | p = os.path.join(SRC_DIR, str(mod.name) + "-ast.c")
|
|---|
| 1205 | f = open(p, "wb")
|
|---|
| 1206 | f.write(auto_gen_msg)
|
|---|
| 1207 | f.write(c_file_msg % mod.version)
|
|---|
| 1208 | f.write('#include "Python.h"\n')
|
|---|
| 1209 | f.write('#include "%s-ast.h"\n' % mod.name)
|
|---|
| 1210 | f.write('\n')
|
|---|
| 1211 | f.write("static PyTypeObject AST_type;\n")
|
|---|
| 1212 | v = ChainOfVisitors(
|
|---|
| 1213 | PyTypesDeclareVisitor(f),
|
|---|
| 1214 | PyTypesVisitor(f),
|
|---|
| 1215 | Obj2ModPrototypeVisitor(f),
|
|---|
| 1216 | FunctionVisitor(f),
|
|---|
| 1217 | ObjVisitor(f),
|
|---|
| 1218 | Obj2ModVisitor(f),
|
|---|
| 1219 | ASTModuleVisitor(f),
|
|---|
| 1220 | PartingShots(f),
|
|---|
| 1221 | )
|
|---|
| 1222 | v.visit(mod)
|
|---|
| 1223 | f.close()
|
|---|
| 1224 |
|
|---|
| 1225 | if __name__ == "__main__":
|
|---|
| 1226 | import sys
|
|---|
| 1227 | import getopt
|
|---|
| 1228 |
|
|---|
| 1229 | INC_DIR = ''
|
|---|
| 1230 | SRC_DIR = ''
|
|---|
| 1231 | opts, args = getopt.getopt(sys.argv[1:], "h:c:")
|
|---|
| 1232 | if len(opts) != 1:
|
|---|
| 1233 | print "Must specify exactly one output file"
|
|---|
| 1234 | sys.exit(1)
|
|---|
| 1235 | for o, v in opts:
|
|---|
| 1236 | if o == '-h':
|
|---|
| 1237 | INC_DIR = v
|
|---|
| 1238 | if o == '-c':
|
|---|
| 1239 | SRC_DIR = v
|
|---|
| 1240 | if len(args) != 1:
|
|---|
| 1241 | print "Must specify single input file"
|
|---|
| 1242 | sys.exit(1)
|
|---|
| 1243 | main(args[0])
|
|---|
