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/*
* upb - a minimalist implementation of protocol buffers.
*
* Copyright (c) 2010 Joshua Haberman. See LICENSE for details.
*
* Data structure for storing a message of protobuf data.
*/
#ifndef UPB_MSG_H
#define UPB_MSG_H
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
upb_atomic_refcount_t refcount;
uint32_t len;
uint32_t size;
upb_valueptr elements;
};
upb_array *upb_array_new(void);
INLINE uint32_t upb_array_len(upb_array *a) {
return a->len;
}
void _upb_array_free(upb_array *a, upb_fielddef *f);
INLINE void upb_array_unref(upb_array *a, upb_fielddef *f) {
if (upb_atomic_unref(&a->refcount)) _upb_array_free(a, f);
}
INLINE upb_value upb_array_get(upb_array *a, upb_fielddef *f, uint32_t elem) {
assert(elem < upb_array_len(a));
return upb_value_read(_upb_array_getptr(a, f, elem), f->type);
}
// For string or submessages, will release a ref on the previously set value.
INLINE void upb_array_set(upb_array *a, upb_fielddef *f, uint32_t elem,
upb_value val) {
}
// Append an element with the default value, returning it. For strings or
// submessages, this will try to reuse previously allocated memory.
INLINE upb_value upb_array_append_mutable(upb_array *a, upb_fielddef *f) {
}
typedef struct {
upb_atomic_refcount_t refcount;
uint8_t data[4]; // We allocate the appropriate amount per message.
} upb_msg;
// Creates a new msg of the given type.
upb_msg *upb_msg_new(upb_msgdef *md);
void _upb_msg_free(upb_msg *msg, upb_msgdef *md);
INLINE void upb_msg_unref(upb_msg *msg, upb_msgdef *md) {
if (upb_atomic_unref(&msg->refcount)) _upb_msg_free(msg, md);
}
// Tests whether the given field is explicitly set, or whether it will return a
// default.
INLINE bool upb_msg_has(upb_msg *msg, upb_fielddef *f) {
return (msg->data[f->field_index/8] & (1 << (f->field_index % 8))) != 0;
}
// Returns the current value of the given field if set, or the default value if
// not set.
INLINE upb_value upb_msg_get(upb_msg *msg, upb_fielddef *f) {
if (upb_msg_has(msg, f)) {
return upb_value_read(_upb_msg_getptr(msg, f), f->type);
} else {
return f->default_value;
}
}
// If the given string, submessage, or array is already set, returns it.
// Otherwise sets it and returns an empty instance, attempting to reuse any
// previously allocated memory.
INLINE upb_value upb_msg_getmutable(upb_msg *msg, upb_fielddef *f) {
}
// Sets the current value of the field. If this is a string, array, or
// submessage field, releases a ref on the value (if any) that was previously
// set.
INLINE void upb_msg_set(upb_msg *msg, upb_fielddef *f, upb_value val) {
}
// Unsets all field values back to their defaults.
INLINE void upb_msg_clear(upb_msg *msg, upb_msgdef *md) {
memset(msg->data, 0, md->set_flags_bytes);
}
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif
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