mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 08:40:07 +00:00
89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/* Quote a blob so that it can be used in C literals.
|
|
Copyright (C) 2018-2024 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 <support/support.h>
|
|
#include <support/xmemstream.h>
|
|
|
|
char *
|
|
SUPPORT_QUOTE_BLOB (const void *blob, size_t length)
|
|
{
|
|
struct xmemstream out;
|
|
xopen_memstream (&out);
|
|
|
|
const CHAR *p = blob;
|
|
for (size_t i = 0; i < length; ++i)
|
|
{
|
|
CHAR ch = p[i];
|
|
|
|
/* Use C backslash escapes for those control characters for
|
|
which they are defined. */
|
|
switch (ch)
|
|
{
|
|
case L_('\a'):
|
|
putc_unlocked ('\\', out.out);
|
|
putc_unlocked ('a', out.out);
|
|
break;
|
|
case L_('\b'):
|
|
putc_unlocked ('\\', out.out);
|
|
putc_unlocked ('b', out.out);
|
|
break;
|
|
case L_('\f'):
|
|
putc_unlocked ('\\', out.out);
|
|
putc_unlocked ('f', out.out);
|
|
break;
|
|
case L_('\n'):
|
|
putc_unlocked ('\\', out.out);
|
|
putc_unlocked ('n', out.out);
|
|
break;
|
|
case L_('\r'):
|
|
putc_unlocked ('\\', out.out);
|
|
putc_unlocked ('r', out.out);
|
|
break;
|
|
case L_('\t'):
|
|
putc_unlocked ('\\', out.out);
|
|
putc_unlocked ('t', out.out);
|
|
break;
|
|
case L_('\v'):
|
|
putc_unlocked ('\\', out.out);
|
|
putc_unlocked ('v', out.out);
|
|
break;
|
|
case L_('\\'):
|
|
case L_('\''):
|
|
case L_('\"'):
|
|
putc_unlocked ('\\', out.out);
|
|
putc_unlocked (ch, out.out);
|
|
break;
|
|
default:
|
|
if (ch < L_(' ') || ch > L_('~'))
|
|
/* For narrow characters, use octal sequences because they
|
|
are fixed width, unlike hexadecimal sequences. For
|
|
wide characters, use N2785 delimited escape
|
|
sequences. */
|
|
if (WIDE)
|
|
fprintf (out.out, "\\x{%x}", (unsigned int) ch);
|
|
else
|
|
fprintf (out.out, "\\%03o", (unsigned int) ch);
|
|
else
|
|
putc_unlocked (ch, out.out);
|
|
}
|
|
}
|
|
|
|
xfclose_memstream (&out);
|
|
return out.buffer;
|
|
}
|