| BSON_ARRAY_BUILDER_T(3) | libbson | BSON_ARRAY_BUILDER_T(3) |
typedef struct _bson_array_builder_t bson_array_builder_t;
bson_array_builder_t may be used to build BSON arrays. bson_array_builder_t internally tracks and uses the array index as a key ("0", "1", "2", ...) when appending elements.
APPENDING AN ARRAY VALUE¶
typedef struct _bson_array_builder_t bson_array_builder_t; bool bson_append_array_builder_begin (bson_t *bson,
const char *key,
int key_length,
bson_array_builder_t **child); bool bson_append_array_builder_end (bson_t *bson, bson_array_builder_t *child); #define BSON_APPEND_ARRAY_BUILDER_BEGIN(b, key, child) \
bson_append_array_builder_begin (b, key, (int) strlen (key), child)
bson_append_array_builder_begin may be used to append an array as a value. Example:
bson_t parent = BSON_INITIALIZER;
bson_array_builder_t *bab;
bson_append_array_builder_begin (&parent, "foo", 3, &bab);
bson_array_builder_append_int32 (bab, 9);
bson_array_builder_append_int32 (bab, 8);
bson_array_builder_append_int32 (bab, 7);
bson_append_array_builder_end (&parent, bab);
char *str = bson_as_relaxed_extended_json (&parent, NULL);
printf ("%s\n", str); // Prints: { "foo" : [ 9, 8, 7 ] }
bson_free (str);
bson_destroy (&parent);
CREATING A TOP-LEVEL ARRAY¶
bson_array_builder_t * bson_array_builder_new (void); bool bson_array_builder_build (bson_array_builder_t *bab, bson_t *out); void bson_array_builder_destroy (bson_array_builder_t *bab);
bson_array_builder_new and bson_array_builder_build may be used to build a top-level BSON array. bson_array_builder_build initializes and moves BSON data to out. The bson_array_builder_t may be reused and will start appending a new array at index "0":
Example:
bson_t out;
bson_array_builder_t *bab = bson_array_builder_new ();
bson_array_builder_append_int32 (bab, 9);
bson_array_builder_append_int32 (bab, 8);
bson_array_builder_append_int32 (bab, 7);
bson_array_builder_build (bab, &out);
char *str = bson_array_as_relaxed_extended_json (&out, NULL);
printf ("%s\n", str); // Prints: [ 9, 8, 7 ]
bson_free (str);
bson_array_builder_destroy (bab);
APPENDING VALUES TO AN ARRAY¶
bson_array_builder_append_* functions are provided to append values to a BSON array. The bson_array_builder_append_* functions internally use bson_append_* and provide the array index as a key:
bool bson_array_builder_append_value (bson_array_builder_t *bab,
const bson_value_t *value); bool bson_array_builder_append_array (bson_array_builder_t *bab,
const bson_t *array); bool bson_array_builder_append_binary (bson_array_builder_t *bab,
bson_subtype_t subtype,
const uint8_t *binary,
uint32_t length); bool bson_array_builder_append_bool (bson_array_builder_t *bab, bool value); bool bson_array_builder_append_code (bson_array_builder_t *bab,
const char *javascript); bool bson_array_builder_append_code_with_scope (bson_array_builder_t *bab,
const char *javascript,
const bson_t *scope); bool bson_array_builder_append_dbpointer (bson_array_builder_t *bab,
const char *collection,
const bson_oid_t *oid); bool bson_array_builder_append_double (bson_array_builder_t *bab, double value); bool bson_array_builder_append_document (bson_array_builder_t *bab,
const bson_t *value); bool bson_array_builder_append_document_begin (bson_array_builder_t *bab,
bson_t *child); bool bson_array_builder_append_document_end (bson_array_builder_t *bab,
bson_t *child); bool bson_array_builder_append_int32 (bson_array_builder_t *bab, int32_t value); bool bson_array_builder_append_int64 (bson_array_builder_t *bab, int64_t value); bool bson_array_builder_append_decimal128 (bson_array_builder_t *bab,
const bson_decimal128_t *value); bool bson_array_builder_append_iter (bson_array_builder_t *bab,
const bson_iter_t *iter); bool bson_array_builder_append_minkey (bson_array_builder_t *bab); bool bson_array_builder_append_maxkey (bson_array_builder_t *bab); bool bson_array_builder_append_null (bson_array_builder_t *bab); bool bson_array_builder_append_oid (bson_array_builder_t *bab,
const bson_oid_t *oid); bool bson_array_builder_append_regex (bson_array_builder_t *bab,
const char *regex,
const char *options); bool bson_array_builder_append_regex_w_len (bson_array_builder_t *bab,
const char *regex,
int regex_length,
const char *options); bool bson_array_builder_append_utf8 (bson_array_builder_t *bab,
const char *value,
int length); bool bson_array_builder_append_symbol (bson_array_builder_t *bab,
const char *value,
int length); bool bson_array_builder_append_time_t (bson_array_builder_t *bab, time_t value); bool bson_array_builder_append_timeval (bson_array_builder_t *bab,
struct timeval *value); bool bson_array_builder_append_date_time (bson_array_builder_t *bab, int64_t value); bool bson_array_builder_append_now_utc (bson_array_builder_t *bab); bool bson_array_builder_append_timestamp (bson_array_builder_t *bab,
uint32_t timestamp,
uint32_t increment); bool bson_array_builder_append_undefined (bson_array_builder_t *bab); bool bson_array_builder_append_array_builder_begin (bson_array_builder_t *bab,
bson_array_builder_t **child); bool bson_array_builder_append_array_builder_end (bson_array_builder_t *bab,
bson_array_builder_t *child);
AUTHOR¶
MongoDB, Inc
COPYRIGHT¶
2009-present, MongoDB, Inc.
| December 12, 2024 | 1.29.1 |