#!/usr/bin/python3

# The OS/K Team licenses this file to you under the MIT license.
# See the LICENSE file in the project root for more information.

from tempfile import TemporaryFile

def parse_1(fi, fp):
    global count

    # "instr ri ri" => "instr r r\ninstr r i\ninstr i r..."
    # not optimal but will do for now
    for _, line in enumerate(fi):
        if line[0] == '#' or line[0] == ' ' or line[0] == '\n':
            continue

        line = line.strip()

        if line[:8] == "include ":
            _, fn = line.split(' ', 1)
            fi2 = open(fn[1:-1])
            parse_1(fi2, fp)
            continue

        fp.write("{}\n".format(line))

def parse_2(fp):
    global count
    fp.seek(0)

    for _, line in enumerate(fp):
        tok = line.strip().split(' ')

        assert(len(tok) > 0)

        deprecated = ''
        if tok[0][0] == '!':
            assert(len(tok[0]) > 1)
            deprecated = '__'
            tok[0] = tok[0][1:]

        if len(tok) == 1:
            name = tok[0]
            n = 0

        else:
            assert(len(tok) == 2)
            n = tok[1]

        ls.write("{}{}\n".format(deprecated, tok[0]))

        hd.write("#ifdef _NEED_ARCH_I\n")
        hd.write('{{ "{}{}", {}, i_{} }},\n'\
                    .format(deprecated, tok[0], n, tok[0]))
        hd.write("#else\n")
        hd.write("#define I_{} {}\n".format(tok[0].upper(), count))
        hd.write("extern bool i_{}(acc_t *, acc_t *, acc_t *, ulong *, ulong *, ulong *);\n"
                    .format(tok[0]))
        hd.write("#endif\n\n")

        count = count + 1

fi = open("INSTRS")
hd = open("../ob/arch_i.h", "w")
ls = open("../ob/instrs.lst", "w")

count = 0

hd.write("// Auto-generated by arch_i.py from INSTRS\n\n");

hd.write("#ifdef _NEED_ARCH_I\n")
hd.write("instr_t arch_i[] =\n{\n\n")
hd.write("#endif\n")

fp = TemporaryFile(mode="w+")
parse_1(fi, fp)
parse_2(fp)

hd.write("#ifdef _NEED_ARCH_I\n")
hd.write("};\n")
hd.write("#else\n")
hd.write("#define NINSTRS {}\n\n".format(count))
hd.write("#endif\n")

ls.close()
hd.close()