stdio-common/Xprintf_buffer_puts_1.c

   1 /* String write function for struct __*printf_buffer.  Generic version.
   2    Copyright (C) 2022-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <assert.h>
  20 #include <string.h>
  21
  22 void
  23 Xprintf (buffer_puts_1) (struct Xprintf_buffer *buf, const CHAR_T *s)
  24 {
  25   if (__glibc_unlikely (Xprintf_buffer_has_failed (buf)))
  26     return;
  27
  28   while (*s != 0)
  29     {
  30       if (buf->write_ptr == buf->write_end && !Xprintf_buffer_flush (buf))
  31         return;
  32       assert (buf->write_ptr != buf->write_end);
  33       size_t to_copy = STRNLEN (s, buf->write_end - buf->write_ptr);
  34       MEMCPY (buf->write_ptr, s, to_copy);
  35       buf->write_ptr += to_copy;
  36       s += to_copy;
  37     }
  38 }