diff options
Diffstat (limited to 'src/fluent-bit/plugins/processor_attributes/variant_utils.h')
| -rw-r--r-- | src/fluent-bit/plugins/processor_attributes/variant_utils.h | 626 |
1 files changed, 626 insertions, 0 deletions
diff --git a/src/fluent-bit/plugins/processor_attributes/variant_utils.h b/src/fluent-bit/plugins/processor_attributes/variant_utils.h new file mode 100644 index 000000000..7ba376273 --- /dev/null +++ b/src/fluent-bit/plugins/processor_attributes/variant_utils.h @@ -0,0 +1,626 @@ +/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ + +/* CMetrics + * ======== + * Copyright 2021-2022 The CMetrics Authors + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef VARIANT_UTILS_H +#define VARIANT_UTILS_H + +#include <mpack/mpack.h> + +/* These are the only functions meant for general use, + * the reason why the kvlist packing and unpacking + * functions are exposed is the internal and external + * metadata kvlists in the cmetrics context are not + * contained by a variant instance. + * + * Result : + * Upon success all of these return 0, otherwise they will + * raise the innermost error code which should be treated + * as an opaque value. + * + * Notes : + * When decoding -1 means the check after mpack_read_tag + * failed and -2 means the type was not the one expected + */ + +static inline int pack_cfl_variant(mpack_writer_t *writer, + struct cfl_variant *value); + +static inline int pack_cfl_variant_kvlist(mpack_writer_t *writer, + struct cfl_kvlist *kvlist); + +static inline int unpack_cfl_variant(mpack_reader_t *reader, + struct cfl_variant **value); + +static inline int unpack_cfl_kvlist(mpack_reader_t *reader, + struct cfl_kvlist **result_kvlist); + +/* Packers */ +static inline int pack_cfl_variant_string(mpack_writer_t *writer, + char *value) +{ + mpack_write_cstr(writer, value); + + return 0; +} + +static inline int pack_cfl_variant_binary(mpack_writer_t *writer, + char *value, + size_t length) +{ + mpack_write_bin(writer, value, length); + + return 0; +} + +static inline int pack_cfl_variant_boolean(mpack_writer_t *writer, + unsigned int value) +{ + mpack_write_bool(writer, value); + + return 0; +} + +static inline int pack_cfl_variant_int64(mpack_writer_t *writer, + int64_t value) +{ + mpack_write_int(writer, value); + + return 0; +} + +static inline int pack_cfl_variant_double(mpack_writer_t *writer, + double value) +{ + mpack_write_double(writer, value); + + return 0; +} + +static inline int pack_cfl_variant_array(mpack_writer_t *writer, + struct cfl_array *array) +{ + size_t entry_count; + struct cfl_variant *entry_value; + int result; + size_t index; + + entry_count = array->entry_count; + + mpack_start_array(writer, entry_count); + + for (index = 0 ; index < entry_count ; index++) { + entry_value = cfl_array_fetch_by_index(array, index); + + if (entry_value == NULL) { + return -1; + } + + result = pack_cfl_variant(writer, entry_value); + + if (result != 0) { + return result; + } + } + + mpack_finish_array(writer); + + return 0; +} + +static inline int pack_cfl_variant_kvlist(mpack_writer_t *writer, + struct cfl_kvlist *kvlist) { + size_t entry_count; + struct cfl_list *iterator; + struct cfl_kvpair *kvpair; + int result; + + entry_count = cfl_kvlist_count(kvlist); + + mpack_start_map(writer, entry_count); + + cfl_list_foreach(iterator, &kvlist->list) { + kvpair = cfl_list_entry(iterator, struct cfl_kvpair, _head); + + mpack_write_cstr(writer, kvpair->key); + + result = pack_cfl_variant(writer, kvpair->val); + + if (result != 0) { + return result; + } + } + + mpack_finish_map(writer); + + return 0; +} + +static inline int pack_cfl_variant(mpack_writer_t *writer, + struct cfl_variant *value) +{ + int result; + + if (value->type == CFL_VARIANT_STRING) { + result = pack_cfl_variant_string(writer, value->data.as_string); + } + else if (value->type == CFL_VARIANT_BOOL) { + result = pack_cfl_variant_boolean(writer, value->data.as_bool); + } + else if (value->type == CFL_VARIANT_INT) { + result = pack_cfl_variant_int64(writer, value->data.as_int64); + } + else if (value->type == CFL_VARIANT_DOUBLE) { + result = pack_cfl_variant_double(writer, value->data.as_double); + } + else if (value->type == CFL_VARIANT_ARRAY) { + result = pack_cfl_variant_array(writer, value->data.as_array); + } + else if (value->type == CFL_VARIANT_KVLIST) { + result = pack_cfl_variant_kvlist(writer, value->data.as_kvlist); + } + else if (value->type == CFL_VARIANT_BYTES) { + result = pack_cfl_variant_binary(writer, + value->data.as_bytes, + cfl_sds_len(value->data.as_bytes)); + } + else if (value->type == CFL_VARIANT_REFERENCE) { + result = pack_cfl_variant_string(writer, value->data.as_string); + } + else { + result = -1; + } + + return result; +} + +/* Unpackers */ + +static inline int unpack_cfl_variant_read_tag(mpack_reader_t *reader, + mpack_tag_t *tag, + mpack_type_t expected_type) +{ + *tag = mpack_read_tag(reader); + + if (mpack_ok != mpack_reader_error(reader)) { + return -1; + } + + if (mpack_tag_type(tag) != expected_type) { + return -2; + } + + return 0; +} + +static inline int unpack_cfl_array(mpack_reader_t *reader, + struct cfl_array **result_array) +{ + struct cfl_array *internal_array; + size_t entry_count; + struct cfl_variant *entry_value; + int result; + size_t index; + mpack_tag_t tag; + + result = unpack_cfl_variant_read_tag(reader, &tag, mpack_type_array); + + if (result != 0) { + return result; + } + + entry_count = mpack_tag_array_count(&tag); + + internal_array = cfl_array_create(entry_count); + + if (internal_array == NULL) { + return -3; + } + + for (index = 0 ; index < entry_count ; index++) { + result = unpack_cfl_variant(reader, &entry_value); + + if (result != 0) { + cfl_array_destroy(internal_array); + + return -4; + } + + result = cfl_array_append(internal_array, entry_value); + + if (result != 0) { + cfl_array_destroy(internal_array); + + return -5; + } + } + + mpack_done_array(reader); + + if (mpack_reader_error(reader) != mpack_ok) { + cfl_array_destroy(internal_array); + + return -6; + } + + *result_array = internal_array; + + return 0; +} + +static inline int unpack_cfl_kvlist(mpack_reader_t *reader, + struct cfl_kvlist **result_kvlist) +{ + struct cfl_kvlist *internal_kvlist; + char key_name[256]; + size_t entry_count; + size_t key_length; + struct cfl_variant *key_value; + mpack_tag_t key_tag; + int result; + size_t index; + mpack_tag_t tag; + + result = unpack_cfl_variant_read_tag(reader, &tag, mpack_type_map); + + if (result != 0) { + return result; + } + + entry_count = mpack_tag_map_count(&tag); + + internal_kvlist = cfl_kvlist_create(); + + if (internal_kvlist == NULL) { + return -3; + } + + result = 0; + key_value = NULL; + + for (index = 0 ; index < entry_count ; index++) { + result = unpack_cfl_variant_read_tag(reader, &key_tag, mpack_type_str); + + if (result != 0) { + result = -4; + + break; + } + + key_length = mpack_tag_str_length(&key_tag); + + if (key_length >= sizeof(key_name)) { + result = -5; + + break; + } + + mpack_read_cstr(reader, key_name, sizeof(key_name), key_length); + + key_name[key_length] = '\0'; + + mpack_done_str(reader); + + if (mpack_ok != mpack_reader_error(reader)) { + result = -6; + + break; + } + + result = unpack_cfl_variant(reader, &key_value); + + if (result != 0) { + result = -7; + + break; + } + + result = cfl_kvlist_insert(internal_kvlist, key_name, key_value); + + if (result != 0) { + result = -8; + + break; + } + + key_value = NULL; + } + + mpack_done_map(reader); + + if (mpack_reader_error(reader) != mpack_ok) { + result = -9; + } + + if (result != 0) { + cfl_kvlist_destroy(internal_kvlist); + + if (key_value != NULL) { + cfl_variant_destroy(key_value); + } + } + else { + *result_kvlist = internal_kvlist; + } + + return result; +} + +static inline int unpack_cfl_variant_string(mpack_reader_t *reader, + struct cfl_variant **value) +{ + size_t value_length; + char *value_data; + int result; + mpack_tag_t tag; + + result = unpack_cfl_variant_read_tag(reader, &tag, mpack_type_str); + + if (result != 0) { + return result; + } + + value_length = mpack_tag_str_length(&tag); + + value_data = cfl_sds_create_size(value_length + 1); + + if (value_data == NULL) { + return -3; + } + + cfl_sds_set_len(value_data, value_length); + + mpack_read_cstr(reader, value_data, value_length + 1, value_length); + + mpack_done_str(reader); + + if (mpack_reader_error(reader) != mpack_ok) { + cfl_sds_destroy(value_data); + + return -4; + } + + *value = cfl_variant_create_from_reference(value_data); + + if (*value == NULL) { + return -5; + } + + (*value)->type = CFL_VARIANT_STRING; + + return 0; +} + +static inline int unpack_cfl_variant_binary(mpack_reader_t *reader, + struct cfl_variant **value) +{ + size_t value_length; + char *value_data; + int result; + mpack_tag_t tag; + + result = unpack_cfl_variant_read_tag(reader, &tag, mpack_type_bin); + + if (result != 0) { + return result; + } + + value_length = mpack_tag_bin_length(&tag); + + value_data = cfl_sds_create_size(value_length); + + if (value_data == NULL) { + return -3; + } + + cfl_sds_set_len(value_data, value_length); + + mpack_read_bytes(reader, value_data, value_length); + + mpack_done_bin(reader); + + if (mpack_reader_error(reader) != mpack_ok) { + cfl_sds_destroy(value_data); + + return -4; + } + + *value = cfl_variant_create_from_reference(value_data); + + if (*value == NULL) { + return -5; + } + + (*value)->type = CFL_VARIANT_BYTES; + + return 0; +} + +static inline int unpack_cfl_variant_boolean(mpack_reader_t *reader, + struct cfl_variant **value) +{ + int result; + mpack_tag_t tag; + + result = unpack_cfl_variant_read_tag(reader, &tag, mpack_type_bool); + + if (result != 0) { + return result; + } + + *value = cfl_variant_create_from_bool((unsigned int) mpack_tag_bool_value(&tag)); + + if (*value == NULL) { + return -3; + } + + return 0; +} + +static inline int unpack_cfl_variant_uint64(mpack_reader_t *reader, + struct cfl_variant **value) +{ + int result; + mpack_tag_t tag; + + result = unpack_cfl_variant_read_tag(reader, &tag, mpack_type_uint); + + if (result != 0) { + return result; + } + + *value = cfl_variant_create_from_int64((int64_t) mpack_tag_uint_value(&tag)); + + if (*value == NULL) { + return -3; + } + + return 0; +} + +static inline int unpack_cfl_variant_int64(mpack_reader_t *reader, + struct cfl_variant **value) +{ + int result; + mpack_tag_t tag; + + result = unpack_cfl_variant_read_tag(reader, &tag, mpack_type_int); + + if (result != 0) { + return result; + } + + *value = cfl_variant_create_from_int64((int64_t) mpack_tag_int_value(&tag)); + + if (*value == NULL) { + return -3; + } + + return 0; +} + +static inline int unpack_cfl_variant_double(mpack_reader_t *reader, + struct cfl_variant **value) +{ + int result; + mpack_tag_t tag; + + result = unpack_cfl_variant_read_tag(reader, &tag, mpack_type_double); + + if (result != 0) { + return result; + } + + *value = cfl_variant_create_from_double(mpack_tag_double_value(&tag)); + + if (*value == NULL) { + return -3; + } + + return 0; +} + +static inline int unpack_cfl_variant_array(mpack_reader_t *reader, + struct cfl_variant **value) +{ + struct cfl_array *unpacked_array; + int result; + + result = unpack_cfl_array(reader, &unpacked_array); + + if (result != 0) { + return result; + } + + *value = cfl_variant_create_from_array(unpacked_array); + + if (*value == NULL) { + return -3; + } + + return 0; +} + +static inline int unpack_cfl_variant_kvlist(mpack_reader_t *reader, + struct cfl_variant **value) +{ + struct cfl_kvlist *unpacked_kvlist; + int result; + + result = unpack_cfl_kvlist(reader, &unpacked_kvlist); + + if (result != 0) { + return result; + } + + *value = cfl_variant_create_from_kvlist(unpacked_kvlist); + + if (*value == NULL) { + return -3; + } + + return 0; +} + +static inline int unpack_cfl_variant(mpack_reader_t *reader, + struct cfl_variant **value) +{ + mpack_type_t value_type; + int result; + mpack_tag_t tag; + + tag = mpack_peek_tag(reader); + + if (mpack_ok != mpack_reader_error(reader)) { + return -1; + } + + value_type = mpack_tag_type(&tag); + + if (value_type == mpack_type_str) { + result = unpack_cfl_variant_string(reader, value); + } + else if (value_type == mpack_type_str) { + result = unpack_cfl_variant_boolean(reader, value); + } + else if (value_type == mpack_type_int) { + result = unpack_cfl_variant_int64(reader, value); + } + else if (value_type == mpack_type_uint) { + result = unpack_cfl_variant_uint64(reader, value); + } + else if (value_type == mpack_type_double) { + result = unpack_cfl_variant_double(reader, value); + } + else if (value_type == mpack_type_array) { + result = unpack_cfl_variant_array(reader, value); + } + else if (value_type == mpack_type_map) { + result = unpack_cfl_variant_kvlist(reader, value); + } + else if (value_type == mpack_type_bin) { + result = unpack_cfl_variant_binary(reader, value); + } + else { + result = -1; + } + + return result; +} + +#endif |