1  /* Blob 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 <printf_buffer.h>
      20  
      21  #include <assert.h>
      22  #include <string.h>
      23  
      24  void
      25  Xprintf_buffer_write (struct Xprintf_buffer *buf,
      26                          const CHAR_T *s, size_t count)
      27  {
      28    if (__glibc_unlikely (Xprintf_buffer_has_failed (buf)))
      29      return;
      30  
      31    while (count > 0)
      32      {
      33        if (buf->write_ptr == buf->write_end && !Xprintf_buffer_flush (buf))
      34          return;
      35        assert (buf->write_ptr != buf->write_end);
      36        size_t to_copy = buf->write_end - buf->write_ptr;
      37        if (to_copy > count)
      38          to_copy = count;
      39        MEMCPY (buf->write_ptr, s, to_copy);
      40        buf->write_ptr += to_copy;
      41        s += to_copy;
      42        count -= to_copy;
      43      }
      44  }