Limit jstream parse depth (#20474)

Add https://github.com/bcicen/jstream/pull/15 by vendoring the package.

Sets JSON depth limit to 100 entries in S3 Select.

internal/s3select/jstream/errors.go

@@ -0,0 +1,52 @@
+package jstream
+
+import (
+	"fmt"
+	"strconv"
+)
+
+// Predefined errors
+var (
+	ErrSyntax        = DecoderError{msg: "invalid character"}
+	ErrUnexpectedEOF = DecoderError{msg: "unexpected end of JSON input"}
+	ErrMaxDepth      = DecoderError{msg: "maximum recursion depth exceeded"}
+)
+
+type errPos [2]int // line number, byte offset where error occurred
+
+// DecoderError contains a detailed decoding error.
+type DecoderError struct {
+	msg       string // description of error
+	context   string // additional error context
+	pos       errPos
+	atChar    byte
+	readerErr error // underlying reader error, if any
+}
+
+// ReaderErr returns the underlying error.
+func (e DecoderError) ReaderErr() error { return e.readerErr }
+
+// Error returns a string representation of the error.
+func (e DecoderError) Error() string {
+	loc := fmt.Sprintf("%s [%d,%d]", quoteChar(e.atChar), e.pos[0], e.pos[1])
+	s := fmt.Sprintf("%s %s: %s", e.msg, e.context, loc)
+	if e.readerErr != nil {
+		s += "\nreader error: " + e.readerErr.Error()
+	}
+	return s
+}
+
+// quoteChar formats c as a quoted character literal
+func quoteChar(c byte) string {
+	// special cases - different from quoted strings
+	if c == '\'' {
+		return `'\''`
+	}
+	if c == '"' {
+		return `'"'`
+	}
+
+	// use quoted string with different quotation marks
+	s := strconv.Quote(string(c))
+	return "'" + s[1:len(s)-1] + "'"
+}