// Code generated by re2c, DO NOT EDIT. //line "go/submatch/03_posix.re":1 //go:generate re2go $INPUT -o $OUTPUT package main import ( "errors" "testing" ) //line "go/submatch/03_posix.go":12 var YYMAXNMATCH int = 5 //line "go/submatch/03_posix.re":9 var eBadIP error = errors.New("bad IP") func lex(str string) (int, error) { var cursor, marker, yynmatch int yypmatch := make([]int, YYMAXNMATCH*2) //line "go/submatch/03_posix.go":23 var yyt1 int var yyt2 int var yyt3 int var yyt4 int //line "go/submatch/03_posix.re":16 num := func(pos int, end int) int { n := 0 for ; pos < end; pos++ { n = n*10 + int(str[pos]-'0') } return n } //line "go/submatch/03_posix.go":40 { var yych byte yych = str[cursor] switch (yych) { case '0': yyt1 = cursor goto yy4 case '1': yyt1 = cursor goto yy5 case '2': yyt1 = cursor goto yy6 case '3': fallthrough case '4': fallthrough case '5': fallthrough case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': yyt1 = cursor goto yy7 default: goto yy2 } yy2: cursor += 1 yy3: //line "go/submatch/03_posix.re":51 { return 0, eBadIP } //line "go/submatch/03_posix.go":77 yy4: cursor += 1 marker = cursor yych = str[cursor] switch (yych) { case '.': goto yy8 default: goto yy3 } yy5: cursor += 1 marker = cursor yych = str[cursor] switch (yych) { case '.': goto yy8 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': fallthrough case '5': fallthrough case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': goto yy10 default: goto yy3 } yy6: cursor += 1 marker = cursor yych = str[cursor] switch (yych) { case '.': goto yy8 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': goto yy10 case '5': goto yy11 case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': goto yy12 default: goto yy3 } yy7: cursor += 1 marker = cursor yych = str[cursor] switch (yych) { case '.': goto yy8 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': fallthrough case '5': fallthrough case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': goto yy12 default: goto yy3 } yy8: cursor += 1 yych = str[cursor] switch (yych) { case '0': yyt2 = cursor goto yy13 case '1': yyt2 = cursor goto yy14 case '2': yyt2 = cursor goto yy15 case '3': fallthrough case '4': fallthrough case '5': fallthrough case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': yyt2 = cursor goto yy16 default: goto yy9 } yy9: cursor = marker goto yy3 yy10: cursor += 1 yych = str[cursor] switch (yych) { case '.': goto yy8 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': fallthrough case '5': fallthrough case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': goto yy12 default: goto yy9 } yy11: cursor += 1 yych = str[cursor] switch (yych) { case '.': goto yy8 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': fallthrough case '5': goto yy12 default: goto yy9 } yy12: cursor += 1 yych = str[cursor] switch (yych) { case '.': goto yy8 default: goto yy9 } yy13: cursor += 1 yych = str[cursor] switch (yych) { case '.': goto yy17 default: goto yy9 } yy14: cursor += 1 yych = str[cursor] switch (yych) { case '.': goto yy17 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': fallthrough case '5': fallthrough case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': goto yy16 default: goto yy9 } yy15: cursor += 1 yych = str[cursor] switch (yych) { case '.': goto yy17 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': goto yy16 case '5': goto yy18 case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': goto yy13 default: goto yy9 } yy16: cursor += 1 yych = str[cursor] switch (yych) { case '.': goto yy17 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': fallthrough case '5': fallthrough case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': goto yy13 default: goto yy9 } yy17: cursor += 1 yych = str[cursor] switch (yych) { case '0': yyt3 = cursor goto yy19 case '1': yyt3 = cursor goto yy20 case '2': yyt3 = cursor goto yy21 case '3': fallthrough case '4': fallthrough case '5': fallthrough case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': yyt3 = cursor goto yy22 default: goto yy9 } yy18: cursor += 1 yych = str[cursor] switch (yych) { case '.': goto yy17 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': fallthrough case '5': goto yy13 default: goto yy9 } yy19: cursor += 1 yych = str[cursor] switch (yych) { case '.': goto yy23 default: goto yy9 } yy20: cursor += 1 yych = str[cursor] switch (yych) { case '.': goto yy23 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': fallthrough case '5': fallthrough case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': goto yy22 default: goto yy9 } yy21: cursor += 1 yych = str[cursor] switch (yych) { case '.': goto yy23 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': goto yy22 case '5': goto yy24 case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': goto yy19 default: goto yy9 } yy22: cursor += 1 yych = str[cursor] switch (yych) { case '.': goto yy23 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': fallthrough case '5': fallthrough case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': goto yy19 default: goto yy9 } yy23: cursor += 1 yych = str[cursor] switch (yych) { case '0': yyt4 = cursor goto yy25 case '1': yyt4 = cursor goto yy26 case '2': yyt4 = cursor goto yy27 case '3': fallthrough case '4': fallthrough case '5': fallthrough case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': yyt4 = cursor goto yy28 default: goto yy9 } yy24: cursor += 1 yych = str[cursor] switch (yych) { case '.': goto yy23 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': fallthrough case '5': goto yy19 default: goto yy9 } yy25: cursor += 1 yych = str[cursor] if (yych <= 0x00) { goto yy29 } goto yy9 yy26: cursor += 1 yych = str[cursor] switch (yych) { case 0x00: goto yy29 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': fallthrough case '5': fallthrough case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': goto yy28 default: goto yy9 } yy27: cursor += 1 yych = str[cursor] switch (yych) { case 0x00: goto yy29 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': goto yy28 case '5': goto yy31 case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': goto yy25 default: goto yy9 } yy28: cursor += 1 yych = str[cursor] switch (yych) { case 0x00: goto yy29 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': fallthrough case '5': fallthrough case '6': fallthrough case '7': fallthrough case '8': fallthrough case '9': goto yy25 default: goto yy9 } yy29: cursor += 1 yynmatch = 5 yypmatch[2] = yyt1 yypmatch[4] = yyt2 yypmatch[6] = yyt3 yypmatch[8] = yyt4 yypmatch[0] = yyt1 yypmatch[1] = cursor yypmatch[3] = yyt2 yypmatch[3] += -1 yypmatch[5] = yyt3 yypmatch[5] += -1 yypmatch[7] = yyt4 yypmatch[7] += -1 yypmatch[9] = cursor yypmatch[9] += -1 //line "go/submatch/03_posix.re":42 { if yynmatch != 5 { panic("expected 5 submatch groups") } return num(yypmatch[8], yypmatch[9])+ (num(yypmatch[6], yypmatch[7]) << 8)+ (num(yypmatch[4], yypmatch[5]) << 16)+ (num(yypmatch[2], yypmatch[3]) << 24), nil } //line "go/submatch/03_posix.go":688 yy31: cursor += 1 yych = str[cursor] switch (yych) { case 0x00: goto yy29 case '0': fallthrough case '1': fallthrough case '2': fallthrough case '3': fallthrough case '4': fallthrough case '5': goto yy25 default: goto yy9 } } //line "go/submatch/03_posix.re":52 } func TestLex(t *testing.T) { var tests = []struct { str string res int err error }{ {"1.2.3.4\000", 0x01020304, nil}, {"127.0.0.1\000", 0x7f000001, nil}, {"255.255.255.255\000", 0xffffffff, nil}, {"1.2.3.\000", 0, eBadIP}, {"1.2.3.256\000", 0, eBadIP}, } for _, x := range tests { t.Run(x.str, func(t *testing.T) { res, err := lex(x.str) if !(res == x.res && err == x.err) { t.Errorf("got %d, want %d", res, x.res) } }) } }