diff options
Diffstat (limited to 'src/mongo/gotools/common/json/single_quoted.go')
-rw-r--r-- | src/mongo/gotools/common/json/single_quoted.go | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/mongo/gotools/common/json/single_quoted.go b/src/mongo/gotools/common/json/single_quoted.go new file mode 100644 index 00000000000..ca465ee04f2 --- /dev/null +++ b/src/mongo/gotools/common/json/single_quoted.go @@ -0,0 +1,74 @@ +package json + +// Transition functions for recognizing single-quoted strings. +// Adapted from encoding/json/scanner.go. + +// stateInSingleQuotedString is the state after reading `'`. +func stateInSingleQuotedString(s *scanner, c int) int { + if c == '\'' { + s.step = stateEndValue + return scanContinue + } + if c == '\\' { + s.step = stateInSingleQuotedStringEsc + return scanContinue + } + if c < 0x20 { + return s.error(c, "in string literal") + } + return scanContinue +} + +// stateInSingleQuotedStringEsc is the state after reading `'\` during a quoted string. +func stateInSingleQuotedStringEsc(s *scanner, c int) int { + switch c { + case 'b', 'f', 'n', 'r', 't', '\\', '/', '\'': + s.step = stateInSingleQuotedString + return scanContinue + } + if c == 'u' { + s.step = stateInSingleQuotedStringEscU + return scanContinue + } + return s.error(c, "in string escape code") +} + +// stateInSingleQuotedStringEscU is the state after reading `'\u` during a quoted string. +func stateInSingleQuotedStringEscU(s *scanner, c int) int { + if '0' <= c && c <= '9' || 'a' <= c && c <= 'f' || 'A' <= c && c <= 'F' { + s.step = stateInSingleQuotedStringEscU1 + return scanContinue + } + // numbers + return s.error(c, "in \\u hexadecimal character escape") +} + +// stateInSingleQuotedStringEscU1 is the state after reading `'\u1` during a quoted string. +func stateInSingleQuotedStringEscU1(s *scanner, c int) int { + if '0' <= c && c <= '9' || 'a' <= c && c <= 'f' || 'A' <= c && c <= 'F' { + s.step = stateInSingleQuotedStringEscU12 + return scanContinue + } + // numbers + return s.error(c, "in \\u hexadecimal character escape") +} + +// stateInSingleQuotedStringEscU12 is the state after reading `'\u12` during a quoted string. +func stateInSingleQuotedStringEscU12(s *scanner, c int) int { + if '0' <= c && c <= '9' || 'a' <= c && c <= 'f' || 'A' <= c && c <= 'F' { + s.step = stateInSingleQuotedStringEscU123 + return scanContinue + } + // numbers + return s.error(c, "in \\u hexadecimal character escape") +} + +// stateInSingleQuotedStringEscU123 is the state after reading `'\u123` during a quoted string. +func stateInSingleQuotedStringEscU123(s *scanner, c int) int { + if '0' <= c && c <= '9' || 'a' <= c && c <= 'f' || 'A' <= c && c <= 'F' { + s.step = stateInSingleQuotedString + return scanContinue + } + // numbers + return s.error(c, "in \\u hexadecimal character escape") +} |