+/* max count of uncompress trials, alloc_size <<= 2 for each try */
+#define HTTP_ENCODING_MAXTRY 10
+/* safe padding */
+#define HTTP_ENCODING_SAFPAD 10
+/* add 1% extra space in case we need to encode widely differing (binary) data */
+#define HTTP_ENCODING_BUFLEN(l) (l + (l / 100) + HTTP_ENCODING_SAFPAD)
+
+typedef enum {
+ HTTP_ENCODING_NONE = 0,
+ HTTP_ENCODING_ANY = 1,
+ HTTP_ENCODING_GZIP,
+ HTTP_ENCODING_DEFLATE,
+ HTTP_ENCODING_COMPRESS
+} http_encoding_type;
+
+#define http_encode(t, l, d, dl, r, rl) _http_encode((t), (l), (d), (dl), (r), (rl) TSRMLS_CC)
+PHP_HTTP_API STATUS _http_encode(http_encoding_type type, int level, const char *data, size_t data_len, char **encoded, size_t *encoded_len TSRMLS_DC);
+#define http_decode(t, d, dl, r, rl) _http_decode((t), (l), (d), (dl), (r), (rl) TSRMLS_CC)
+PHP_HTTP_API STATUS _http_decode(http_encoding_type type, const char *data, size_t data_len, char **decoded, size_t *decoded_len TSRMLS_DC);
+
+typedef struct {
+ z_stream Z;
+ int gzip;
+ ulong crc;
+ phpstr *storage;
+} http_encoding_stream;
+
+#define http_encoding_stream_init(s, g, l, e, el) _http_encoding_stream_init((s), (g), (l), (e), (el) TSRMLS_CC)
+PHP_HTTP_API STATUS _http_encoding_stream_init(http_encoding_stream *s, int gzip, int level, char **encoded, size_t *encoded_len TSRMLS_DC);
+#define http_encoding_stream_update(s, d, dl, e, el) _http_encoding_stream_update((s), (d), (dl), (e), (el) TSRMLS_CC)
+PHP_HTTP_API STATUS _http_encoding_stream_update(http_encoding_stream *s, const char *data, size_t data_len, char **encoded, size_t *encoded_len TSRMLS_DC);
+#define http_encoding_stream_finish(s, e, el) _http_encoding_stream_finish((s), (e), (el) TSRMLS_CC)
+PHP_HTTP_API STATUS _http_encoding_stream_finish(http_encoding_stream *s, char **encoded, size_t *encoded_len TSRMLS_DC);
+