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/*
* upb - a minimalist implementation of protocol buffers.
*
* Copyright (c) 2009 Joshua Haberman. See LICENSE for details.
*
* upb_enum is a simple object that allows run-time reflection over the values
* defined within an enum. */
#ifndef UPB_ENUM_H_
#define UPB_ENUM_H_
#include <stdint.h>
#include "upb_table.h"
/* Forward declaration from descriptor.h. */
struct google_protobuf_EnumDescriptorProto;
struct google_protobuf_EnumValueDescriptorProto;
struct upb_enum {
struct google_protobuf_EnumDescriptorProto *descriptor;
struct upb_strtable nametoint;
struct upb_inttable inttoname;
};
struct upb_enum_ntoi_entry {
struct upb_strtable_entry e;
uint32_t value;
};
struct upb_enum_iton_entry {
struct upb_inttable_entry e;
struct upb_string *string;
};
/* Initializes and frees an enum, respectively. Caller retains ownership of
* ed, but it must outlive e. */
INLINE void upb_enum_init(struct upb_enum *e,
struct google_protobuf_EnumDescriptorProto *ed) {
int num_values = ed->set_flags.has.value ? ed->value->len : 0;
e->descriptor = ed;
upb_strtable_init(&e->nametoint, num_values, sizeof(struct upb_enum_ntoi_entry));
upb_inttable_init(&e->inttoname, num_values, sizeof(struct upb_enum_iton_entry));
for(int i = 0; i < num_values; i++) {
google_protobuf_EnumValueDescriptorProto *value = ed->value->elements[i];
struct upb_enum_ntoi_entry ntoi_entry = {.e = {.key = *value->name},
.value = value->number};
struct upb_enum_iton_entry iton_entry = {.e = {.key = value->number},
.string = value->name};
upb_strtable_insert(&e->nametoint, &ntoi_entry.e);
upb_inttable_insert(&e->inttoname, &iton_entry.e);
}
}
INLINE void upb_enum_free(struct upb_enum *e) {
upb_strtable_free(&e->nametoint);
upb_inttable_free(&e->inttoname);
}
#endif /* UPB_ENUM_H_ */
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