alef 0.115.3

Opinionated polyglot binding generator for Rust libraries
Documentation 
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{#- Reads the first choice of one streamed chunk into the stream buffers.

    Context variables:
    - prefix, prefix_upper: the crate's C ABI symbol prefix and its handle type prefix
    - result:        the per-iteration chunk-handle local
    - text, finish, tools: which buffers the fixture asserts on
    - choices_getter, delta_getter, content_getter: ABI accessor symbols
    - choice_type, delta_type: snake_case type names for `_from_json` and `_free`

    The chunk getter returns the choices as a JSON array. The delta text goes back through the
    choice type's `_from_json`, so it comes from the ABI's own decoded getter and is appended to
    `stream_content` with `realloc`. The finish reason and the tool calls are read from the
    choice's JSON with the runner's helpers. Every handle and string is freed before the next
    chunk; the finish reason and the first tool call name stay until the assertions ran. ~keep
#}
        char *chunk_choices = {{ choices_getter }}({{ result }});
        if (chunk_choices != NULL) {
            char *first_choice_json = alef_json_array_get_index(chunk_choices, 0);
            if (first_choice_json != NULL) {
{%- if finish %}
                char *choice_finish = alef_json_get_string(first_choice_json, "{{ wire.finish }}");
                if (choice_finish != NULL && strcmp(choice_finish, "null") != 0) {
                    free(stream_finish_reason);
                    stream_finish_reason = choice_finish;
                } else {
                    free(choice_finish);
                }
{%- endif %}
{%- if tools %}
                char *choice_delta = alef_json_get_object(first_choice_json, "{{ wire.delta }}");
                char *delta_tool_calls = alef_json_get_object(choice_delta, "{{ wire.tools }}");
                if (delta_tool_calls != NULL) {
                    int delta_tool_call_count = alef_json_array_count(delta_tool_calls);
                    if (delta_tool_call_count > 0 && stream_tool_calls_count == 0) {
                        char *first_call = alef_json_array_get_index(delta_tool_calls, 0);
                        char *call_function = alef_json_get_object(first_call, "{{ wire.function }}");
                        stream_tool_call_name = alef_json_get_string(call_function, "{{ wire.name }}");
                        free(call_function);
                        free(first_call);
                    }
                    stream_tool_calls_count += delta_tool_call_count;
                    free(delta_tool_calls);
                }
                free(choice_delta);
{%- endif %}
{%- if text %}
                {{ prefix_upper }}AlefHandle first_choice = {{ prefix }}_{{ choice_type }}_from_json(first_choice_json);
                if (first_choice != 0) {
                    {{ prefix_upper }}AlefHandle delta = {{ delta_getter }}(first_choice);
                    if (delta != 0) {
                        char *delta_content = {{ content_getter }}(delta);
                        if (delta_content != NULL) {
                            size_t delta_len = strlen(delta_content);
                            char *grown = (char *)realloc(stream_content, stream_content_len + delta_len + 1);
                            assert(grown != NULL);
                            stream_content = grown;
                            memcpy(stream_content + stream_content_len, delta_content, delta_len + 1);
                            stream_content_len += delta_len;
                            {{ prefix }}_free_string(delta_content);
                        }
                        {{ prefix }}_{{ delta_type }}_free(delta);
                    }
                    {{ prefix }}_{{ choice_type }}_free(first_choice);
                }
{%- endif %}
                free(first_choice_json);
            }
            {{ prefix }}_free_string(chunk_choices);
        }