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|
# Generated by re2py
# re2py $INPUT -o $OUTPUT -c
YYC_INIT = 0
YYC_BIN = 10
YYC_OCT = 13
YYC_DEC = 16
YYC_HEX = 19
def parse_u32(yyinput):
yycursor = 0
yycond = YYC_INIT
num = 0
while True:
yystate = yycond
while True:
match yystate:
case 0:
yych = yyinput[yycursor]
yycursor += 1
if yych <= 0x2F:
yystate = 1
continue
if yych <= 0x30:
yystate = 2
continue
if yych <= 0x39:
yystate = 4
continue
yystate = 1
continue
case 1:
return None
case 2:
yymarker = yycursor
yych = yyinput[yycursor]
if yych <= 0x58:
if yych == 0x42:
yycursor += 1
yystate = 5
continue
if yych >= 0x58:
yycursor += 1
yystate = 7
continue
yystate = 3
continue
else:
if yych <= 0x62:
if yych >= 0x62:
yycursor += 1
yystate = 5
continue
yystate = 3
continue
else:
if yych == 0x78:
yycursor += 1
yystate = 7
continue
yystate = 3
continue
case 3:
yycond = YYC_OCT
yystate = YYC_OCT
continue
case 4:
yycursor -= 1
yycond = YYC_DEC
yystate = YYC_DEC
continue
case 5:
yych = yyinput[yycursor]
if yych <= 0x2F:
yystate = 6
continue
if yych <= 0x31:
yycursor += 1
yystate = 8
continue
yystate = 6
continue
case 6:
yycursor = yymarker
yystate = 3
continue
case 7:
yych = yyinput[yycursor]
if yych <= 0x40:
if yych <= 0x2F:
yystate = 6
continue
if yych <= 0x39:
yycursor += 1
yystate = 9
continue
yystate = 6
continue
else:
if yych <= 0x46:
yycursor += 1
yystate = 9
continue
if yych <= 0x60:
yystate = 6
continue
if yych <= 0x66:
yycursor += 1
yystate = 9
continue
yystate = 6
continue
case 8:
yycursor -= 1
yycond = YYC_BIN
yystate = YYC_BIN
continue
case 9:
yycursor -= 1
yycond = YYC_HEX
yystate = YYC_HEX
continue
case 10:
yych = yyinput[yycursor]
yycursor += 1
if yych <= 0x2F:
yystate = 11
continue
if yych <= 0x31:
yystate = 12
continue
yystate = 11
continue
case 11:
return num
case 12:
num = num * 2 + (yyinput[yycursor - 1] - 48)
break
case 13:
yych = yyinput[yycursor]
yycursor += 1
if yych <= 0x2F:
yystate = 14
continue
if yych <= 0x37:
yystate = 15
continue
yystate = 14
continue
case 14:
return num
case 15:
num = num * 8 + (yyinput[yycursor - 1] - 48)
break
case 16:
yych = yyinput[yycursor]
yycursor += 1
if yych <= 0x2F:
yystate = 17
continue
if yych <= 0x39:
yystate = 18
continue
yystate = 17
continue
case 17:
return num
case 18:
num = num * 10 + (yyinput[yycursor - 1] - 48)
break
case 19:
yych = yyinput[yycursor]
yycursor += 1
if yych <= 0x40:
if yych <= 0x2F:
yystate = 20
continue
if yych <= 0x39:
yystate = 21
continue
yystate = 20
continue
else:
if yych <= 0x46:
yystate = 22
continue
if yych <= 0x60:
yystate = 20
continue
if yych <= 0x66:
yystate = 23
continue
yystate = 20
continue
case 20:
return num
case 21:
num = num * 16 + (yyinput[yycursor - 1] - 48)
break
case 22:
num = num * 16 + (yyinput[yycursor - 1] - 55)
break
case 23:
num = num * 16 + (yyinput[yycursor - 1] - 87)
break
case _:
raise "internal lexer error"
assert parse_u32(b"\0") == None
assert parse_u32(b"1234567890\0") == 1234567890
assert parse_u32(b"0b1101\0") == 13
assert parse_u32(b"0x7Fe\0") == 2046
assert parse_u32(b"0644\0") == 420
assert parse_u32(b"9999999999\0") == 9999999999
|
