diff options
Diffstat (limited to 'vendor/github.com/aws/aws-sdk-go/internal/ini/literal_tokens.go')
-rw-r--r-- | vendor/github.com/aws/aws-sdk-go/internal/ini/literal_tokens.go | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/vendor/github.com/aws/aws-sdk-go/internal/ini/literal_tokens.go b/vendor/github.com/aws/aws-sdk-go/internal/ini/literal_tokens.go new file mode 100644 index 000000000..24df543d3 --- /dev/null +++ b/vendor/github.com/aws/aws-sdk-go/internal/ini/literal_tokens.go @@ -0,0 +1,324 @@ +package ini + +import ( + "fmt" + "strconv" + "strings" +) + +var ( + runesTrue = []rune("true") + runesFalse = []rune("false") +) + +var literalValues = [][]rune{ + runesTrue, + runesFalse, +} + +func isBoolValue(b []rune) bool { + for _, lv := range literalValues { + if isLitValue(lv, b) { + return true + } + } + return false +} + +func isLitValue(want, have []rune) bool { + if len(have) < len(want) { + return false + } + + for i := 0; i < len(want); i++ { + if want[i] != have[i] { + return false + } + } + + return true +} + +// isNumberValue will return whether not the leading characters in +// a byte slice is a number. A number is delimited by whitespace or +// the newline token. +// +// A number is defined to be in a binary, octal, decimal (int | float), hex format, +// or in scientific notation. +func isNumberValue(b []rune) bool { + negativeIndex := 0 + helper := numberHelper{} + needDigit := false + + for i := 0; i < len(b); i++ { + negativeIndex++ + + switch b[i] { + case '-': + if helper.IsNegative() || negativeIndex != 1 { + return false + } + helper.Determine(b[i]) + needDigit = true + continue + case 'e', 'E': + if err := helper.Determine(b[i]); err != nil { + return false + } + negativeIndex = 0 + needDigit = true + continue + case 'b': + if helper.numberFormat == hex { + break + } + fallthrough + case 'o', 'x': + needDigit = true + if i == 0 { + return false + } + + fallthrough + case '.': + if err := helper.Determine(b[i]); err != nil { + return false + } + needDigit = true + continue + } + + if i > 0 && (isNewline(b[i:]) || isWhitespace(b[i])) { + return !needDigit + } + + if !helper.CorrectByte(b[i]) { + return false + } + needDigit = false + } + + return !needDigit +} + +func isValid(b []rune) (bool, int, error) { + if len(b) == 0 { + // TODO: should probably return an error + return false, 0, nil + } + + return isValidRune(b[0]), 1, nil +} + +func isValidRune(r rune) bool { + return r != ':' && r != '=' && r != '[' && r != ']' && r != ' ' && r != '\n' +} + +// ValueType is an enum that will signify what type +// the Value is +type ValueType int + +func (v ValueType) String() string { + switch v { + case NoneType: + return "NONE" + case DecimalType: + return "FLOAT" + case IntegerType: + return "INT" + case StringType: + return "STRING" + case BoolType: + return "BOOL" + } + + return "" +} + +// ValueType enums +const ( + NoneType = ValueType(iota) + DecimalType + IntegerType + StringType + QuotedStringType + BoolType +) + +// Value is a union container +type Value struct { + Type ValueType + raw []rune + + integer int64 + decimal float64 + boolean bool + str string +} + +func newValue(t ValueType, base int, raw []rune) (Value, error) { + v := Value{ + Type: t, + raw: raw, + } + var err error + + switch t { + case DecimalType: + v.decimal, err = strconv.ParseFloat(string(raw), 64) + case IntegerType: + if base != 10 { + raw = raw[2:] + } + + v.integer, err = strconv.ParseInt(string(raw), base, 64) + case StringType: + v.str = string(raw) + case QuotedStringType: + v.str = string(raw[1 : len(raw)-1]) + case BoolType: + v.boolean = runeCompare(v.raw, runesTrue) + } + + // issue 2253 + // + // if the value trying to be parsed is too large, then we will use + // the 'StringType' and raw value instead. + if nerr, ok := err.(*strconv.NumError); ok && nerr.Err == strconv.ErrRange { + v.Type = StringType + v.str = string(raw) + err = nil + } + + return v, err +} + +// Append will append values and change the type to a string +// type. +func (v *Value) Append(tok Token) { + r := tok.Raw() + if v.Type != QuotedStringType { + v.Type = StringType + r = tok.raw[1 : len(tok.raw)-1] + } + if tok.Type() != TokenLit { + v.raw = append(v.raw, tok.Raw()...) + } else { + v.raw = append(v.raw, r...) + } +} + +func (v Value) String() string { + switch v.Type { + case DecimalType: + return fmt.Sprintf("decimal: %f", v.decimal) + case IntegerType: + return fmt.Sprintf("integer: %d", v.integer) + case StringType: + return fmt.Sprintf("string: %s", string(v.raw)) + case QuotedStringType: + return fmt.Sprintf("quoted string: %s", string(v.raw)) + case BoolType: + return fmt.Sprintf("bool: %t", v.boolean) + default: + return "union not set" + } +} + +func newLitToken(b []rune) (Token, int, error) { + n := 0 + var err error + + token := Token{} + if b[0] == '"' { + n, err = getStringValue(b) + if err != nil { + return token, n, err + } + + token = newToken(TokenLit, b[:n], QuotedStringType) + } else if isNumberValue(b) { + var base int + base, n, err = getNumericalValue(b) + if err != nil { + return token, 0, err + } + + value := b[:n] + vType := IntegerType + if contains(value, '.') || hasExponent(value) { + vType = DecimalType + } + token = newToken(TokenLit, value, vType) + token.base = base + } else if isBoolValue(b) { + n, err = getBoolValue(b) + + token = newToken(TokenLit, b[:n], BoolType) + } else { + n, err = getValue(b) + token = newToken(TokenLit, b[:n], StringType) + } + + return token, n, err +} + +// IntValue returns an integer value +func (v Value) IntValue() int64 { + return v.integer +} + +// FloatValue returns a float value +func (v Value) FloatValue() float64 { + return v.decimal +} + +// BoolValue returns a bool value +func (v Value) BoolValue() bool { + return v.boolean +} + +func isTrimmable(r rune) bool { + switch r { + case '\n', ' ': + return true + } + return false +} + +// StringValue returns the string value +func (v Value) StringValue() string { + switch v.Type { + case StringType: + return strings.TrimFunc(string(v.raw), isTrimmable) + case QuotedStringType: + // preserve all characters in the quotes + return string(removeEscapedCharacters(v.raw[1 : len(v.raw)-1])) + default: + return strings.TrimFunc(string(v.raw), isTrimmable) + } +} + +func contains(runes []rune, c rune) bool { + for i := 0; i < len(runes); i++ { + if runes[i] == c { + return true + } + } + + return false +} + +func runeCompare(v1 []rune, v2 []rune) bool { + if len(v1) != len(v2) { + return false + } + + for i := 0; i < len(v1); i++ { + if v1[i] != v2[i] { + return false + } + } + + return true +} |