Initial checkin of gRPC to third_party/

third_party/grpc/src/core/transport/chttp2/hpack_parser.h

Index: third_party/grpc/src/core/transport/chttp2/hpack_parser.h
diff --git a/third_party/grpc/src/core/transport/chttp2/hpack_parser.h b/third_party/grpc/src/core/transport/chttp2/hpack_parser.h
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index 0000000000000000000000000000000000000000..1ad0c64fb9cae281e664243fe7d1686faa105f36
--- /dev/null
+++ b/third_party/grpc/src/core/transport/chttp2/hpack_parser.h
@@ -0,0 +1,116 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HPACK_PARSER_H
+#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HPACK_PARSER_H
+
+#include <stddef.h>
+
+#include <grpc/support/port_platform.h>
+#include "src/core/iomgr/exec_ctx.h"
+#include "src/core/transport/chttp2/frame.h"
+#include "src/core/transport/chttp2/hpack_table.h"
+#include "src/core/transport/metadata.h"
+
+typedef struct grpc_chttp2_hpack_parser grpc_chttp2_hpack_parser;
+
+typedef int (*grpc_chttp2_hpack_parser_state)(grpc_chttp2_hpack_parser *p,
+                                              const uint8_t *beg,
+                                              const uint8_t *end);
+
+typedef struct {
+  char *str;
+  uint32_t length;
+  uint32_t capacity;
+} grpc_chttp2_hpack_parser_string;
+
+struct grpc_chttp2_hpack_parser {
+  /* user specified callback for each header output */
+  void (*on_header)(void *user_data, grpc_mdelem *md);
+  void *on_header_user_data;
+
+  /* current parse state - or a function that implements it */
+  grpc_chttp2_hpack_parser_state state;
+  /* future states dependent on the opening op code */
+  const grpc_chttp2_hpack_parser_state *next_state;
+  /* what to do after skipping prioritization data */
+  grpc_chttp2_hpack_parser_state after_prioritization;
+  /* the value we're currently parsing */
+  union {
+    uint32_t *value;
+    grpc_chttp2_hpack_parser_string *str;
+  } parsing;
+  /* string parameters for each chunk */
+  grpc_chttp2_hpack_parser_string key;
+  grpc_chttp2_hpack_parser_string value;
+  /* parsed index */
+  uint32_t index;
+  /* length of source bytes for the currently parsing string */
+  uint32_t strlen;
+  /* number of source bytes read for the currently parsing string */
+  uint32_t strgot;
+  /* huffman decoding state */
+  int16_t huff_state;
+  /* is the string being decoded binary? */
+  uint8_t binary;
+  /* is the current string huffman encoded? */
+  uint8_t huff;
+  /* is a dynamic table update allowed? */
+  uint8_t dynamic_table_update_allowed;
+  /* set by higher layers, used by grpc_chttp2_header_parser_parse to signal
+     it should append a metadata boundary at the end of frame */
+  uint8_t is_boundary;
+  uint8_t is_eof;
+  uint32_t base64_buffer;
+
+  /* hpack table */
+  grpc_chttp2_hptbl table;
+};
+
+void grpc_chttp2_hpack_parser_init(grpc_chttp2_hpack_parser *p);
+void grpc_chttp2_hpack_parser_destroy(grpc_chttp2_hpack_parser *p);
+
+void grpc_chttp2_hpack_parser_set_has_priority(grpc_chttp2_hpack_parser *p);
+
+/* returns 1 on success, 0 on error */
+int grpc_chttp2_hpack_parser_parse(grpc_chttp2_hpack_parser *p,
+                                   const uint8_t *beg, const uint8_t *end);
+
+/* wraps grpc_chttp2_hpack_parser_parse to provide a frame level parser for
+   the transport */
+grpc_chttp2_parse_error grpc_chttp2_header_parser_parse(
+    grpc_exec_ctx *exec_ctx, void *hpack_parser,
+    grpc_chttp2_transport_parsing *transport_parsing,
+    grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last);
+
+#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HPACK_PARSER_H */