commit 273991ceadac558ba3bca5238d81833a7b34cb2d
author Josh Gao <jmgao@google.com> Wed Feb 15 11:46:55 2017 -0800
committer Josh Gao <jmgao@google.com> Wed Feb 15 16:10:37 2017 -0800
tree fd37f96c94c5e26bceb0b5538cd29ffb1a77da38
parent 7b5245408499ef48afc8def662fcfab09683e1c4

Add __libc_format_buffer_va_list.

Bug: http://b/35367169
Test: m
Change-Id: I133f231d3b93bdef56d06497679320a89c7188a9

libc/bionic/libc_logging.cpp

diff --git a/libc/bionic/libc_logging.cpp b/libc/bionic/libc_logging.cpp
index ebbc286..a5b68fb 100644
--- a/libc/bionic/libc_logging.cpp
+++ b/libc/bionic/libc_logging.cpp
@@ -422,6 +422,13 @@
   return os.total;
 }
 
+int __libc_format_buffer_va_list(char* buffer, size_t buffer_size, const char* format,
+                                 va_list args) {
+  BufferOutputStream os(buffer, buffer_size);
+  out_vformat(os, format, args);
+  return os.total;
+}
+
 int __libc_format_fd(int fd, const char* format, ...) {
   FdOutputStream os(fd);
   va_list args;

libc/private/libc_logging.h

diff --git a/libc/private/libc_logging.h b/libc/private/libc_logging.h
index 9fa5982..49a5a3c 100644
--- a/libc/private/libc_logging.h
+++ b/libc/private/libc_logging.h
@@ -79,6 +79,15 @@
 //
 
 int __libc_format_buffer(char* _Nonnull buf, size_t size, const char* _Nonnull fmt, ...) __printflike(3, 4);
+
+#if defined(__arm__) || defined(__aarch64__) || defined(__x86_64__)
+int __libc_format_buffer_va_list(char* _Nonnull buffer, size_t buffer_size,
+                                 const char* _Nonnull format, va_list args);
+#else // defined(__mips__) || defined(__i386__)
+int __libc_format_buffer_va_list(char* _Nonnull buffer, size_t buffer_size,
+                                 const char* _Nonnull format, va_list _Nonnull args);
+#endif
+
 int __libc_format_fd(int fd, const char* _Nonnull format , ...) __printflike(2, 3);
 int __libc_format_log(int pri, const char* _Nonnull tag, const char* _Nonnull fmt, ...) __printflike(3, 4);
 #if defined(__arm__) || defined(__aarch64__) || defined(__x86_64__)