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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 00:53:35 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 00:53:35 +0000 |
commit | 69c6a41ffb878ef98c9378ed4b1634a404cfaa7f (patch) | |
tree | b2a4f704565d62fbb129ab9dc3b35977c50e6e7f /src/contrib/string.h | |
parent | Initial commit. (diff) | |
download | knot-upstream/2.7.6.tar.xz knot-upstream/2.7.6.zip |
Adding upstream version 2.7.6.upstream/2.7.6upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/contrib/string.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/src/contrib/string.h b/src/contrib/string.h new file mode 100644 index 0000000..19c74c7 --- /dev/null +++ b/src/contrib/string.h @@ -0,0 +1,82 @@ +/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +/*! + * \brief String manipulations. + */ + +#pragma once + +#include <stddef.h> +#include <stdint.h> + +/*! + * \brief Create a copy of a binary buffer. + * + * Like \c strdup, but for binary data. + */ +uint8_t *memdup(const uint8_t *data, size_t data_size); + +/*! + * \brief Format string and take care of allocating memory. + * + * \note sprintf(3) manual page reference implementation. + * + * \param fmt Message format. + * \return formatted message or NULL. + */ +char *sprintf_alloc(const char *fmt, ...); + +/*! + * \brief Create new string from a concatenation of s1 and s2. + * + * \param s1 First string. + * \param s2 Second string. + * + * \retval Newly allocated string on success. + * \retval NULL on error. + */ +char *strcdup(const char *s1, const char *s2); + +/*! + * \brief Create a copy of a string skipping leading and trailing white spaces. + * + * \return Newly allocated string, NULL in case of error. + */ +char *strstrip(const char *str); + +/*! + * \brief Compare data in time based on string length. + * This function just checks for (in)equality not for relation + * + * \param s1 The first address to compare. + * \param s2 The second address to compare. + * \param n The size of memory to compare. + * + * \return Non zero on difference and zero if the buffers are identical. + */ +int const_time_memcmp(const void *s1, const void *s2, size_t n); + +/*! + * \brief Fill memory with zeroes. + * + * Inspired by OPENSSL_cleanse. Such a memset shouldn't be optimized out. + * + * \param s The address to fill. + * \param n The size of memory to fill. + * + * \return Pointer to the memory. + */ +void *memzero(void *s, size_t n); |