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# This script generates the opcode.h header file.

import sys

import tokenize

header = """/* Auto-generated by Tools/scripts/generate_opcode_h.py */

#ifndef Py_OPCODE_H

#define Py_OPCODE_H

#ifdef __cplusplus

extern "C" {

#endif

/* Instruction opcodes for compiled code */

"""

footer = """

/* EXCEPT_HANDLER is a special, implicit block type which is created when

entering an except handler. It is not an opcode but we define it here

as we want it to be available to both frameobject.c and ceval.c, while

remaining private.*/

#define EXCEPT_HANDLER 257

enum cmp_op {PyCmp_LT=Py_LT, PyCmp_LE=Py_LE, PyCmp_EQ=Py_EQ, PyCmp_NE=Py_NE,

PyCmp_GT=Py_GT, PyCmp_GE=Py_GE, PyCmp_IN, PyCmp_NOT_IN,

PyCmp_IS, PyCmp_IS_NOT, PyCmp_EXC_MATCH, PyCmp_BAD};

#define HAS_ARG(op) ((op) >= HAVE_ARGUMENT)

#ifdef __cplusplus

}

#endif

#endif /* !Py_OPCODE_H */

"""

def main(opcode_py, outfile='Include/opcode.h'):

opcode = {}

if hasattr(tokenize, 'open'):

fp = tokenize.open(opcode_py) # Python 3.2+

else:

fp = open(opcode_py) # Python 2.7

with fp:

code = fp.read()

exec(code, opcode)

opmap = opcode['opmap']

with open(outfile, 'w') as fobj:

fobj.write(header)

for name in opcode['opname']:

if name in opmap:

fobj.write("#define %-23s %3s\n" % (name, opmap[name]))

if name == 'POP_EXCEPT': # Special entry for HAVE_ARGUMENT

fobj.write("#define %-23s %3d\n" %

('HAVE_ARGUMENT', opcode['HAVE_ARGUMENT']))

fobj.write(footer)

print("%s regenerated from %s" % (outfile, opcode_py))

if __name__ == '__main__':

main(sys.argv[1], sys.argv[2])