Factor out the internal helper AppendTruncated, which is used and redefined in a couple places, plus several more that have yet to be released.

PiperOrigin-RevId: 486759835
Change-Id: Ib1b24f287f856ca38b691fbce7e747f0f5a34626

1 files changed, 2 insertions, 9 deletions

diff --git a/absl/log/internal/log_message.cc b/absl/log/internal/log_message.cc
index f32c7e63..98e45f87 100644
--- a/absl/log/internal/log_message.cc
+++ b/absl/log/internal/log_message.cc
@@ -41,6 +41,7 @@
 #include "absl/container/inlined_vector.h"
 #include "absl/debugging/internal/examine_stack.h"
 #include "absl/log/globals.h"
+#include "absl/log/internal/append_truncated.h"
 #include "absl/log/internal/config.h"
 #include "absl/log/internal/globals.h"
 #include "absl/log/internal/log_format.h"
@@ -65,14 +66,6 @@ ABSL_NAMESPACE_BEGIN
 namespace log_internal {
 
 namespace {
-// Copies into `dst` as many bytes of `src` as will fit, then truncates the
-// copied bytes from the front of `dst` and returns the number of bytes written.
-size_t AppendTruncated(absl::string_view src, absl::Span<char>* dst) {
-  if (src.size() > dst->size()) src = src.substr(0, dst->size());
-  memcpy(dst->data(), src.data(), src.size());
-  dst->remove_prefix(src.size());
-  return src.size();
-}
 
 absl::string_view Basename(absl::string_view filepath) {
 #ifdef _WIN32
@@ -163,7 +156,7 @@ class LogEntryStreambuf final : public std::streambuf {
 
   size_t Append(absl::string_view data) {
     absl::Span<char> remaining(pptr(), static_cast<size_t>(epptr() - pptr()));
-    const size_t written = AppendTruncated(data, &remaining);
+    const size_t written = log_internal::AppendTruncated(data, remaining);
     pbump(static_cast<int>(written));
     return written;
   }