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/*
* upb - a minimalist implementation of protocol buffers.
*
* Copyright (c) 2011 Google Inc. See LICENSE for details.
* Author: Josh Haberman <jhaberman@gmail.com>
*
* upb_descreader provides a set of sink handlers that will build defs from a
* data source that uses the descriptor.proto schema (like a protobuf binary
* descriptor).
*/
#ifndef UPB_DESCRIPTOR_H
#define UPB_DESCRIPTOR_H
#include "upb/handlers.h"
#ifdef __cplusplus
extern "C" {
#endif
/* upb_deflist ****************************************************************/
// upb_deflist is an internal-only dynamic array for storing a growing list of
// upb_defs.
typedef struct {
upb_def **defs;
size_t len;
size_t size;
bool owned;
} upb_deflist;
void upb_deflist_init(upb_deflist *l);
void upb_deflist_uninit(upb_deflist *l);
void upb_deflist_push(upb_deflist *l, upb_def *d);
/* upb_descreader ************************************************************/
// We keep a stack of all the messages scopes we are currently in, as well as
// the top-level file scope. This is necessary to correctly qualify the
// definitions that are contained inside. "name" tracks the name of the
// message or package (a bare name -- not qualified by any enclosing scopes).
typedef struct {
char *name;
// Index of the first def that is under this scope. For msgdefs, the
// msgdef itself is at start-1.
int start;
} upb_descreader_frame;
typedef struct {
upb_deflist defs;
upb_descreader_frame stack[UPB_MAX_TYPE_DEPTH];
int stack_len;
upb_status status;
uint32_t number;
char *name;
bool saw_number;
bool saw_name;
char *default_string;
upb_fielddef *f;
} upb_descreader;
void upb_descreader_init(upb_descreader *r);
void upb_descreader_uninit(upb_descreader *r);
// Registers handlers that will build the defs. Pass the descreader as the
// closure.
const upb_handlers *upb_descreader_newhandlers(const void *owner);
// Gets the array of defs that have been parsed and removes them from the
// descreader. Ownership of the defs is passed to the caller using the given
// owner), but the ownership of the returned array is retained and is
// invalidated by any other call into the descreader. The defs will not have
// been resolved, and are ready to be added to a symtab.
upb_def **upb_descreader_getdefs(upb_descreader *r, void *owner, int *n);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif
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