chore: fix some bad conversions (#9703)

Be more defensive with type conversions.

BEGIN_NESTED_COMMIT
fix(pubsublite): fix int conversion
END_NESTED_COMMIT
BEGIN_NESTED_COMMIT
fix(spanner): fix uint8 conversion
END_NESTED_COMMIT
BEGIN_NESTED_COMMIT
fix(auth): fix uint32 conversion
END_NESTED_COMMIT

Fixes: #9704

auth/httptransport/trace.go

@@ -77,7 +77,7 @@ func (f *httpFormat) SpanContextFromRequest(req *http.Request) (sc trace.SpanCon
 	if !strings.HasPrefix(h, "o=") {
 		return sc, true
 	}
-	o, err := strconv.ParseUint(h[2:], 10, 64)
+	o, err := strconv.ParseUint(h[2:], 10, 32)
 	if err != nil {
 		return trace.SpanContext{}, false
 	}

pubsublite/pscompat/message.go

@@ -162,11 +162,10 @@ func ParseMessageMetadata(id string) (*MessageMetadata, error) {
 	if len(parts) != 2 {
 		return nil, fmt.Errorf("pubsublite: invalid encoded message metadata %q", id)
 	}
-
-	partition, pErr := strconv.ParseInt(parts[0], 10, 64)
+	partition, pErr := strconv.Atoi(parts[0])
 	offset, oErr := strconv.ParseInt(parts[1], 10, 64)
 	if pErr != nil || oErr != nil {
 		return nil, fmt.Errorf("pubsublite: invalid encoded message metadata %q", id)
 	}
-	return &MessageMetadata{Partition: int(partition), Offset: offset}, nil
+	return &MessageMetadata{Partition: partition, Offset: offset}, nil
 }

spanner/spansql/parser.go

@@ -607,7 +607,7 @@ func (p *parser) consumeStringContent(delim string, raw, unicode bool, name stri
 				if !(i+1 < len(p.s) && isHexDigit(p.s[i]) && isHexDigit(p.s[i+1])) {
 					return "", p.errorf("illegal escape sequence: hex escape sequence must be followed by 2 hex digits")
 				}
-				c, err := strconv.ParseUint(p.s[i:i+2], 16, 64)
+				c, err := strconv.ParseUint(p.s[i:i+2], 16, 8)
 				if err != nil {
 					return "", p.errorf("illegal escape sequence: invalid hex digits: %q: %v", p.s[i:i+2], err)
 				}