feat(routing): make path segments easily accessible from request struct

src/http/lnm_http_loop_process.c

@@ -58,10 +58,11 @@ void lnm_http_loop_process_route(lnm_http_conn *conn) {
   lnm_http_loop_ctx *ctx = conn->ctx;
   const lnm_http_loop_gctx *gctx = ctx->g;
 
-  switch (lnm_http_router_route(&ctx->match, gctx->router, ctx->req.method,
+  switch (lnm_http_router_route(&ctx->req.route_match, gctx->router,
+                                ctx->req.method,
                                 ctx->req.buf.s + ctx->req.path.o)) {
   case lnm_http_route_err_match:
-    ctx->cur_step = ctx->match.route->step;
+    ctx->cur_step = ctx->req.route_match.route->step;
     ctx->state = lnm_http_loop_state_parse_headers;
     break;
   case lnm_http_route_err_unknown_method:

src/http/lnm_http_req.c

@@ -112,3 +112,19 @@ lnm_err lnm_http_req_header_get_s(const char **out, size_t *out_len,
 
   return lnm_err_not_found;
 }
+
+size_t lnm_http_req_route_segment(const char **out, lnm_http_req *req,
+                                  const char *key) {
+  const lnm_http_route_match_segment *segment =
+      lnm_http_route_match_get(&req->route_match, key);
+
+  if (segment == NULL) {
+    return 0;
+  }
+
+  if (out != NULL) {
+    *out = req->buf.s + req->path.o + segment->start;
+  }
+
+  return segment->len;
+}