feat(zig): native Arboricx bundle parser and C ABI

ext/zig/tests/native_bundle_id_test.c

@@ -0,0 +1,60 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include "../include/arboricx.h"
+
+static uint8_t *read_file(const char *path, size_t *out_len) {
+    FILE *f = fopen(path, "rb");
+    if (!f) return NULL;
+    fseek(f, 0, SEEK_END);
+    *out_len = ftell(f);
+    fseek(f, 0, SEEK_SET);
+    uint8_t *buf = malloc(*out_len);
+    fread(buf, 1, *out_len, f);
+    fclose(f);
+    return buf;
+}
+
+int main() {
+    arb_ctx_t *ctx = arboricx_init();
+    if (!ctx) { printf("init failed\n"); return 1; }
+
+    size_t bundle_len;
+    uint8_t *bundle = read_file("../../test/fixtures/id.arboricx", &bundle_len);
+    if (!bundle) { printf("bundle not found\n"); return 1; }
+    printf("bundle size=%zu\n", bundle_len);
+
+    clock_t t0 = clock();
+    uint32_t term = arb_load_bundle(ctx, bundle, bundle_len, "root");
+    clock_t t1 = clock();
+    printf("load_bundle took %.3f ms, term=%u\n", (double)(t1 - t0) * 1000.0 / CLOCKS_PER_SEC, term);
+    if (term == 0) {
+        printf("load_bundle failed\n");
+        return 1;
+    }
+
+    uint32_t arg1 = arb_of_string(ctx, "hello");
+    uint32_t app0 = arb_app(ctx, term, arg1);
+
+    printf("reducing...\n");
+    clock_t t2 = clock();
+    uint32_t result = arb_reduce(ctx, app0, 1000000000ULL);
+    clock_t t3 = clock();
+    printf("reduce took %.3f ms, result=%u\n", (double)(t3 - t2) * 1000.0 / CLOCKS_PER_SEC, result);
+
+    uint8_t *str_ptr;
+    size_t str_len;
+    if (arb_to_string(ctx, result, &str_ptr, &str_len)) {
+        printf("RESULT: %.*s\n", (int)str_len, str_ptr);
+        arboricx_free_buf(ctx, str_ptr, str_len);
+    } else {
+        printf("to_string failed\n");
+        return 1;
+    }
+
+    free(bundle);
+    arboricx_free(ctx);
+    printf("done\n");
+    return 0;
+}