#define BSON_APPEND_UTF8(b, key, val) \

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025                               BSON_APPEND_UTF8(3)

       The bson_append_utf8() function shall append a UTF-8 encoded string to bson.

       valueMUST be valid UTF-8.

       Some UTF-8 implementations allow for \0 to be contained within the string (excluding the termination  \0.
       This is allowed, but remember that it could cause issues with communicating with external systems that do
       not support it.

       It  is  suggested  to  use  modified  UTF-8 which uses a 2 byte representation for embedded \0 within the
       string. This will allow these UTF-8 encoded strings to used with many libc functions.

       Due to legacy behavior, passing NULL for value appends a null value, not a UTF8 value. To append  a  null
       value directly, prefer using bson_append_null().

       • bson: A bson_t.

       • key: An ASCII C string containing the name of the field.

       • key_length: The length of key in bytes, or -1 to determine the length with strlen().

       • value: A UTF-8 encoded string.

       • length:  The  number  of  bytes  in value excluding the trailing \0, or -1 to determine the length with
         strlen().

       Returns  true  if  the  operation was applied successfully. The function will fail if appending the value
       grows bson larger than INT32_MAX.

          #define BSON_APPEND_UTF8(b, key, val) \
             bson_append_utf8 (b, key, (int) strlen (key), val, (int) strlen (val))

          bool
          bson_append_utf8 (bson_t *bson,
                            const char *key,
                            int key_length,
                            const char *value,
                            int length);