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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>
*
* Routines for building defs by parsing descriptors in descriptor.proto format.
* This only needs to use the public API of upb_symtab. Later we may also
* add routines for dumping a symtab to a descriptor.
*/
#ifndef UPB_DESCRIPTOR_H
#define UPB_DESCRIPTOR_H
#include "upb/handlers.h"
#ifdef __cplusplus
extern "C" {
#endif
/* 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.
upb_mhandlers *upb_descreader_reghandlers(upb_handlers *h);
// Gets the array of defs that have been parsed and removes them from the
// descreader. Ownership of the defs is passed to the caller, 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, int *n);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif
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