[libc-commits] [libc] [libc] Implement vasprintf and asprintf (PR #98824)

[Joseph Huber via libc-commits]

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@@ -0,0 +1,25 @@
+//===-- Implementation of asprintf -----------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/stdio/asprintf.h"
+#include "src/__support/OSUtil/io.h"
+#include "src/__support/macros/config.h"
+#include "src/stdio/printf_core/vasprintf_internal.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(int, asprintf,
+                   (char **__restrict buffer, const char *format, ...)) {
+  va_list vlist;
+  va_start(vlist, format);
+  int ret = printf_core::vasprintf_internal(buffer, format, vlist);
+  va_end(vlist);
+  return ret;
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jhuber6 wrote:

Use the `ArgList` helper, see `sprintf`.

https://github.com/llvm/llvm-project/pull/98824