diff options
Diffstat (limited to 'zen/serialize.h')
| -rw-r--r-- | zen/serialize.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/zen/serialize.h b/zen/serialize.h index f3e4f7ff..82ea9971 100644 --- a/zen/serialize.h +++ b/zen/serialize.h @@ -260,6 +260,10 @@ BinContainer unbufferedLoad(Function tryRead /*(void* buffer, size_t bytesToRead BinContainer buf; for (;;) { +#ifndef ZEN_HAVE_RESIZE_AND_OVERWRITE +#error include legacy_compiler.h! +#endif +#if ZEN_HAVE_RESIZE_AND_OVERWRITE //permature(?) perf optimization; avoid needless zero-initialization: size_t bytesRead = 0; buf.resize_and_overwrite(buf.size() + blockSize, [&, bufSizeOld = buf.size()](char* rawBuf, size_t /*rawBufSize: caveat: may be larger than what's requested*/) //permature(?) perf optimization; avoid needless zero-initialization: @@ -267,6 +271,11 @@ BinContainer unbufferedLoad(Function tryRead /*(void* buffer, size_t bytesToRead bytesRead = tryRead(rawBuf + bufSizeOld, blockSize); //throw X; may return short; only 0 means EOF return bufSizeOld + bytesRead; }); +#else + buf.resize(buf.size() + blockSize); //needless zero-initialization! + const size_t bytesRead = tryRead(buf.data() + buf.size() - blockSize, blockSize); //throw X; may return short; only 0 means EOF + buf.resize(buf.size() - blockSize + bytesRead); //caveat: unsigned arithmetics +#endif if (bytesRead == 0) //end of file { //caveat: memory consumption of returned string! |