commit 05764643c4b83b600862dbc4e02167590531f874
Author: Denis Tereshkin <denis@kasan.ws>
Date:   Sat Nov 22 10:05:04 2025 +0700

    Initial commit

diff --git a/event_template.j2 b/event_template.j2
new file mode 100644
index 0000000..95ebda5
--- /dev/null
+++ b/event_template.j2
@@ -0,0 +1,105 @@
+{% set counter = event_start %}
+
+{%- for event in events %}
+
+#define EVENT_ID_{{ event.name }} ({{ counter + loop.index }})
+
+struct event_{{ event.name }}
+{
+{%- for field in event.fields %}
+    {%- if field.size %}
+    {{ field.type }} {{ field.name }}[{{ field.size }}];
+    {%- else %}
+    {{ field.type }} {{ field.name }};
+    {%- endif %}
+{%- endfor %}
+};
+
+void event_trace_{{ event.name }}(
+{%- for field in event.fields %}
+    {%- if field.size or field.pass_by == "ptr" %}
+    const {{ field.type }} * {{ field.name }}{%- if not loop.last %}, {% endif %}
+    {%- else %}
+    {{ field.type }} {{ field.name }}{%- if not loop.last %}, {% endif %}
+    {%- endif %}
+{%- endfor %}
+)
+{
+    struct event_{{ event.name }} d;
+{%- for field in event.fields %}
+{%- if field.size %}
+    strncpy(d.{{ field.name }}, {{ field.name }}, sizeof(d.{{ field.name }}) - 1);
+    d.{{ field.name }}[sizeof(d.{{ field.name }}) - 1] = '\0';
+{%- elif "const char*" == field.type %}
+    strncpy(d.{{ field.name }}, {{ field.name }}, sizeof(d.{{ field.name }}) - 1);
+    d.{{ field.name }}[sizeof(d.{{ field.name }}) - 1] = '\0';
+{%- elif field.pass_by == "ptr" %}
+    d.{{ field.name }} = *{{ field.name }};
+{%- else %}
+    d.{{ field.name }} = {{ field.name }};
+{%- endif %}
+{%- endfor %}
+    eventlog_emit_event_struct(eventlog_get_timestamp(), EVENT_ID_{{ event.name }}, &d, sizeof(d));
+}
+
+void print_{{ event.name }}(const void* data, char* buf, size_t buf_size)
+{
+    const struct event_{{ event.name }}* d = (const struct event_{{ event.name }}*)data;
+{%- set format_parts = [] %}
+{%- set args = [] %}
+{%- set unknown = false %}
+{%- for field in event.fields %}
+{%- if field.converter %}
+    {%- set _ = format_parts.append(field.format) %}
+	{%- if field.pass_by == "ptr" %}
+    {%- set _ = args.append(field.converter + "(&d->" + field.name + ")") %}
+	{%- else %}
+    {%- set _ = args.append(field.converter + "(d->" + field.name + ")") %}
+	{%- endif %}
+{%- elif "uint64_t" == field.type %}
+    {%- set _ = format_parts.append("%llu") %}
+{%- elif "int64_t" == field.type %}
+    {%- set _ = format_parts.append("%lld") %}
+{%- elif "uint32_t" == field.type %}
+    {%- set _ = format_parts.append("%u") %}
+{%- elif "int32_t" == field.type %}
+    {%- set _ = format_parts.append("%d") %}
+{%- elif "uint16_t" == field.type %}
+    {%- set _ = format_parts.append("%u") %}
+{%- elif "int16_t" == field.type %}
+    {%- set _ = format_parts.append("%d") %}
+{%- elif "uint8_t" == field.type %}
+    {%- set _ = format_parts.append("%u") %}
+{%- elif "int8_t" == field.type %}
+    {%- set _ = format_parts.append("%d") %}
+{%- elif "char" == field.type and not field.size %}
+    {%- set _ = format_parts.append("%c") %}
+{%- elif "int" == field.type %}
+    {%- set _ = format_parts.append("%d") %}
+{%- elif "unsigned" == field.type %}
+    {%- set _ = format_parts.append("%u") %}
+{%- elif "char[" in field.type or (field.size and field.type == "char") %}
+    {%- set _ = format_parts.append("%s") %}
+{%- elif "const char*" == field.type %}
+    {%- set _ = format_parts.append("%s") %}
+{%- elif "void*" == field.type %}
+    {%- set _ = format_parts.append("%p") %}
+{%- else %}
+    {%- set _ = format_parts.append("%s") %}
+    {%- set unknown = true %}
+{%- endif %}
+
+{%- if not unknown %}
+  {%- if not field.converter and field.pass_by == "ptr" %}
+	{%- set _ = args.append("&d->" + field.name) %}
+  {%- else %}
+	{%- set _ = args.append("d->" +field.name) %}
+  {%- endif %}
+{%- else %}
+	{%- set _ = args.append("\"<unknown>\"") %}
+{%- endif %}
+
+{%- endfor %}
+    snprintf(buf, buf_size, "{{ event.name }}({{ format_parts|join(', ') }})", {{ args|join(', ') }});
+}
+{%- endfor %}
diff --git a/generate_events.py b/generate_events.py
new file mode 100644
index 0000000..a169319
--- /dev/null
+++ b/generate_events.py
@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+
+import argparse
+from jinja2 import Template
+
+def main():
+    parser = argparse.ArgumentParser(description="Generate C event structures and functions from YAML.")
+    parser.add_argument("input", help="Input YAML file with event definitions")
+    parser.add_argument("output", help="Output C header file")
+    parser.add_argument("--event-start", help="Start event id", required=True)
+    args = parser.parse_args()
+
+    with open(args.input, "r", encoding="utf-8") as f:
+        import yaml
+        events = yaml.safe_load(f)
+
+    with open("event_template.j2", "r", encoding="utf-8") as f:
+        template = Template(f.read())
+
+    with open(args.output, "w", encoding="utf-8") as f:
+        f.write(template.render(events=events, event_start=int(args.event_start)))
+
+if __name__ == "__main__":
+    main()