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stdio-common/Xprintf_buffer_done.c
40 строк
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Paul Eggert
Update copyright dates with scripts/update-copyrights
02 янв 2026, 00:42
02 янв 2026, 00:42
66f3e92
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/* Final status reporting for struct __*printf_buffer. Generic version. Copyright (C) 2022-2026 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #include <errno.h> #include <intprops.h> #include <stdint.h> int Xprintf_buffer_done (struct Xprintf_buffer *buf) { if (Xprintf_buffer_has_failed (buf)) return -1; /* Use uintptr_t here because for sprintf, the buffer range may cover more than half of the address space. */ uintptr_t written_current = buf->write_ptr - buf->write_base; int written_total; if (INT_ADD_WRAPV (buf->written, written_current, &written_total)) { __set_errno (EOVERFLOW); return -1; } else return written_total; }