diff --git a/reactos/lib/sdk/crt/stdio/file.c b/reactos/lib/sdk/crt/stdio/file.c index df9c92127bd..ec22bfe570b 100644 --- a/reactos/lib/sdk/crt/stdio/file.c +++ b/reactos/lib/sdk/crt/stdio/file.c @@ -3293,13 +3293,8 @@ size_t CDECL fread(void *ptr, size_t size, size_t nmemb, FILE* file) while(rcnt>0) { int i; - /* Fill the buffer on small reads. - * TODO: Use a better buffering strategy. - */ - if (!file->_cnt && size*nmemb <= BUFSIZ/2 && !(file->_flag & _IONBF)) { - if (file->_bufsiz == 0) { - alloc_buffer(file); - } + if (!file->_cnt && rcnt_flag & _IONBF) + && (file->_bufsiz != 0 || alloc_buffer(file))) { file->_cnt = _read(file->_file, file->_base, file->_bufsiz); file->_ptr = file->_base; i = ((unsigned int)file->_cnt_cnt : rcnt; @@ -3313,8 +3308,12 @@ size_t CDECL fread(void *ptr, size_t size, size_t nmemb, FILE* file) file->_cnt -= i; file->_ptr += i; } + } else if (rcnt > UINT_MAX) { + i = _read(file->_file, ptr, UINT_MAX); + } else if (rcnt < BUFSIZ) { + i = _read(file->_file, ptr, rcnt); } else { - i = _read(file->_file,ptr, rcnt); + i = _read(file->_file, ptr, rcnt - BUFSIZ/2); } pread += i; rcnt -= i;