io-util: split out iovw_xyz into iovec-wrapper.h

Let's split these APIs out, they are kinda their own thing.
2023-10-20 10:43:50 +02:00
parent 986235a99a
commit ea1f38146a
7 changed files with 177 additions and 145 deletions
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <sys/types.h>
+#include <sys/uio.h>
+
+#include "macro.h"
+
+struct iovec_wrapper {
+        struct iovec *iovec;
+        size_t count;
+};
+
+struct iovec_wrapper *iovw_new(void);
+struct iovec_wrapper *iovw_free(struct iovec_wrapper *iovw);
+struct iovec_wrapper *iovw_free_free(struct iovec_wrapper *iovw);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(struct iovec_wrapper*, iovw_free_free);
+
+void iovw_free_contents(struct iovec_wrapper *iovw, bool free_vectors);
+
+int iovw_put(struct iovec_wrapper *iovw, void *data, size_t len);
+static inline int iovw_consume(struct iovec_wrapper *iovw, void *data, size_t len) {
+        /* Move data into iovw or free on error */
+        int r;
+
+        r = iovw_put(iovw, data, len);
+        if (r < 0)
+                free(data);
+
+        return r;
+}
+
+static inline bool iovw_isempty(const struct iovec_wrapper *iovw) {
+        return !iovw || iovw->count == 0;
+}
+
+int iovw_put_string_field(struct iovec_wrapper *iovw, const char *field, const char *value);
+int iovw_put_string_field_free(struct iovec_wrapper *iovw, const char *field, char *value);
+void iovw_rebase(struct iovec_wrapper *iovw, void *old, void *new);
+size_t iovw_size(const struct iovec_wrapper *iovw);
+int iovw_append(struct iovec_wrapper *target, const struct iovec_wrapper *source);