feat(data-pipeline-ffi): add functions to manipulate span from C

Signed-off-by: Alexandre Rulleau <[email protected]>

Author: Leiyks

data-pipeline-ffi/Cargo.toml

@@ -24,9 +24,9 @@ build_common = { path = "../build-common" }
 [dev-dependencies]
 httpmock = "0.7.0"
 rmp-serde = "1.1.1"
-datadog-trace-utils = { path = "../trace-utils" }
 
 [dependencies]
 data-pipeline = { path = "../data-pipeline" }
 ddcommon-ffi = { path = "../ddcommon-ffi", default-features = false }
 tinybytes = { path = "../tinybytes" }
+datadog-trace-utils = { path = "../trace-utils" }

data-pipeline-ffi/cbindgen.toml

@@ -4,8 +4,14 @@
 language = "C"
 cpp_compat = true
 tab_width = 2
-header = """// Copyright 2021-Present Datadog, Inc. https://www.datadoghq.com/
+header = """// Copyright 2024-Present Datadog, Inc. https://www.datadoghq.com/
 // SPDX-License-Identifier: Apache-2.0
+
+typedef struct ddog_SpanBytes ddog_SpanBytes;
+typedef struct ddog_SpanLinkBytes ddog_SpanLinkBytes;
+typedef struct ddog_SpanEventBytes ddog_SpanEventBytes;
+typedef struct ddog_AttributeAnyValueBytes ddog_AttributeAnyValueBytes;
+typedef struct ddog_AttributeArrayValueBytes ddog_AttributeArrayValueBytes;
 """
 include_guard = "DDOG_DATA_PIPELINE_H"
 includes = ["common.h"]
@@ -23,6 +29,9 @@ renaming_overrides_prefixing = true
 "ExporterResponse" = "ddog_TraceExporterResponse"
 "ExporterErrorCode" = "ddog_TraceExporterErrorCode"
 "ExporterError" = "ddog_TraceExporterError"
+"Span" = "ddog_Span"
+"SpanBytes" = "ddog_SpanBytes"
+"SpanText" = "ddog_SpanText"
 
 [export.mangle]
 rename_types = "PascalCase"
@@ -37,3 +46,6 @@ must_use = "DDOG_CHECK_RETURN"
 [parse]
 parse_deps = true
 include = ["ddcommon", "ddcommon-ffi", "data-pipeline"]
+
+[parse.expand]
+crates = ["data-pipeline-ffi"]

data-pipeline-ffi/src/lib.rs

@@ -8,4 +8,5 @@
 
 mod error;
 mod response;
+mod span;
 mod trace_exporter;