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/*
* upb - a minimalist implementation of protocol buffers.
*
* Copyright (c) 2009-2010 Google Inc. See LICENSE for details.
* Author: Josh Haberman <jhaberman@gmail.com>
*
* upb_decoder implements a high performance, streaming decoder for protobuf
* data that works by getting its input data from a upb_byteregion and calling
* into a upb_handlers.
*/
#ifndef UPB_DECODER_H_
#define UPB_DECODER_H_
#include <setjmp.h>
#include <stdbool.h>
#include <stdint.h>
#include "upb/handlers.h"
#ifdef __cplusplus
extern "C" {
#endif
/* upb_decoder *****************************************************************/
struct dasm_State;
typedef struct _upb_decoder {
upb_byteregion *input; // Input data (serialized).
upb_dispatcher dispatcher; // Dispatcher to which we push parsed data.
upb_status *status; // Where we will store any errors that occur.
upb_byteregion str_byteregion; // For passing string data to callbacks.
// Current input buffer and its stream offset.
const char *buf, *ptr, *end;
uint64_t bufstart_ofs;
// End of the delimited region, relative to ptr, or NULL if not in this buf.
const char *delim_end;
bool top_is_packed;
#ifdef UPB_USE_JIT_X64
// For JIT, which doesn't do bounds checks in the middle of parsing a field.
const char *jit_end, *effective_end; // == MIN(jit_end, submsg_end)
// JIT-generated machine code (else NULL).
char *jit_code;
size_t jit_size;
char *debug_info;
struct dasm_State *dynasm;
#endif
// For exiting the decoder on error.
sigjmp_buf exitjmp;
} upb_decoder;
// Initializes/uninitializes a decoder for calling into the given handlers
// or to write into the given msgdef, given its accessors). Takes a ref
// on the handlers.
void upb_decoder_init(upb_decoder *d, upb_handlers *h);
void upb_decoder_uninit(upb_decoder *d);
// Resets the internal state of an already-allocated decoder. This puts it in a
// state where it has not seen any data, and expects the next data to be from
// the beginning of a new protobuf. Decoders must be reset before they can be
// used. A decoder can be reset multiple times. "input" must live until the
// decoder is reset again (or destroyed).
void upb_decoder_reset(upb_decoder *d, upb_byteregion *input, void *closure);
// Decodes serialized data (calling handlers as the data is parsed) until error
// or EOF (see *status for details).
void upb_decoder_decode(upb_decoder *d, upb_status *status);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* UPB_DECODER_H_ */
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