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author | Florian Weimer <fweimer@redhat.com> | 2018-05-16 17:00:35 +0200 |
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committer | Florian Weimer <fweimer@redhat.com> | 2018-05-16 17:00:36 +0200 |
commit | 2afece36f6006844e87d7cb2fcb1ad8b220b2623 (patch) | |
tree | 52958dc70aaab18d73b3b3ecafc8adfacd0b7131 /support/support_quote_blob.c | |
parent | 9761bf4dfae04016bccaa82414719523b090dd60 (diff) | |
download | glibc-2afece36f6006844e87d7cb2fcb1ad8b220b2623.tar.gz glibc-2afece36f6006844e87d7cb2fcb1ad8b220b2623.tar.xz glibc-2afece36f6006844e87d7cb2fcb1ad8b220b2623.zip |
support: Add TEST_COMPARE_BLOB, support_quote_blob
The declaration of support_test_compare_blob uses unsigned long int, to avoid including <stddef.h>. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'support/support_quote_blob.c')
-rw-r--r-- | support/support_quote_blob.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/support/support_quote_blob.c b/support/support_quote_blob.c new file mode 100644 index 0000000000..d6a678d8d6 --- /dev/null +++ b/support/support_quote_blob.c @@ -0,0 +1,83 @@ +/* Quote a blob so that it can be used in C literals. + Copyright (C) 2018 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 + <http://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 unsigned char *p = blob; + for (size_t i = 0; i < length; ++i) + { + unsigned char ch = p[i]; + + /* Use C backslash escapes for those control characters for + which they are defined. */ + switch (ch) + { + case '\a': + putc_unlocked ('\\', out.out); + putc_unlocked ('a', out.out); + break; + case '\b': + putc_unlocked ('\\', out.out); + putc_unlocked ('b', out.out); + break; + case '\f': + putc_unlocked ('\\', out.out); + putc_unlocked ('f', out.out); + break; + case '\n': + putc_unlocked ('\\', out.out); + putc_unlocked ('n', out.out); + break; + case '\r': + putc_unlocked ('\\', out.out); + putc_unlocked ('r', out.out); + break; + case '\t': + putc_unlocked ('\\', out.out); + putc_unlocked ('t', out.out); + break; + case '\v': + putc_unlocked ('\\', out.out); + putc_unlocked ('v', out.out); + break; + case '\\': + case '\'': + case '\"': + putc_unlocked ('\\', out.out); + putc_unlocked (ch, out.out); + break; + default: + if (ch < ' ' || ch > '~') + /* Use octal sequences because they are fixed width, + unlike hexadecimal sequences. */ + fprintf (out.out, "\\%03o", ch); + else + putc_unlocked (ch, out.out); + } + } + + xfclose_memstream (&out); + return out.buffer; +} |