/usr/share/gocode/src/github.com/influxdata/influxdb/stress/v2/stressql/parser.go is in golang-github-influxdb-influxdb-dev 1.1.1+dfsg1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 | package stressql
import (
"bufio"
"bytes"
"io"
"log"
"os"
"strings"
"github.com/influxdata/influxdb/influxql"
"github.com/influxdata/influxdb/stress/v2/statement"
stressql "github.com/influxdata/influxdb/stress/v2/stressql/statement"
)
// Token represents a lexical token.
type Token int
// These are the lexical tokens used by the file parser
const (
ILLEGAL Token = iota
EOF
STATEMENT
BREAK
)
var eof = rune(0)
func check(e error) {
if e != nil {
log.Fatal(e)
}
}
func isNewline(r rune) bool {
return r == '\n'
}
// Scanner scans the file and tokenizes the raw text
type Scanner struct {
r *bufio.Reader
}
// NewScanner returns a Scanner
func NewScanner(r io.Reader) *Scanner {
return &Scanner{r: bufio.NewReader(r)}
}
func (s *Scanner) read() rune {
ch, _, err := s.r.ReadRune()
if err != nil {
return eof
}
return ch
}
func (s *Scanner) unread() { _ = s.r.UnreadRune() }
func (s *Scanner) peek() rune {
ch := s.read()
s.unread()
return ch
}
// Scan moves the Scanner forward one character
func (s *Scanner) Scan() (tok Token, lit string) {
ch := s.read()
if isNewline(ch) {
s.unread()
return s.scanNewlines()
} else if ch == eof {
return EOF, ""
} else {
s.unread()
return s.scanStatements()
}
// golint marks as unreachable code
// return ILLEGAL, string(ch)
}
func (s *Scanner) scanNewlines() (tok Token, lit string) {
var buf bytes.Buffer
buf.WriteRune(s.read())
for {
if ch := s.read(); ch == eof {
break
} else if !isNewline(ch) {
s.unread()
break
} else {
buf.WriteRune(ch)
}
}
return BREAK, buf.String()
}
func (s *Scanner) scanStatements() (tok Token, lit string) {
var buf bytes.Buffer
buf.WriteRune(s.read())
for {
if ch := s.read(); ch == eof {
break
} else if isNewline(ch) && isNewline(s.peek()) {
s.unread()
break
} else if isNewline(ch) {
s.unread()
buf.WriteRune(ch)
} else {
buf.WriteRune(ch)
}
}
return STATEMENT, buf.String()
}
// ParseStatements takes a configFile and returns a slice of Statements
func ParseStatements(file string) ([]statement.Statement, error) {
seq := []statement.Statement{}
f, err := os.Open(file)
check(err)
s := NewScanner(f)
for {
t, l := s.Scan()
if t == EOF {
break
}
_, err := influxql.ParseStatement(l)
if err == nil {
seq = append(seq, &statement.InfluxqlStatement{Query: l, StatementID: stressql.RandStr(10)})
} else if t == BREAK {
continue
} else {
f := strings.NewReader(l)
p := stressql.NewParser(f)
s, err := p.Parse()
if err != nil {
return nil, err
}
seq = append(seq, s)
}
}
f.Close()
return seq, nil
}
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