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author | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2019-02-02 12:03:44 +0100 |
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committer | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2019-02-02 12:03:44 +0100 |
commit | dc25573ed79a0d55c5a24b20474aa8504a758a2c (patch) | |
tree | 894a85209cb933b89b3d0fdb9c2320b43412424e /test/monniaux/BearSSL/tools/vector.c | |
parent | 44b2d04414b13811868a134f1eae9eaece506b69 (diff) | |
download | compcert-kvx-dc25573ed79a0d55c5a24b20474aa8504a758a2c.tar.gz compcert-kvx-dc25573ed79a0d55c5a24b20474aa8504a758a2c.zip |
BearSSL
Diffstat (limited to 'test/monniaux/BearSSL/tools/vector.c')
-rw-r--r-- | test/monniaux/BearSSL/tools/vector.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/test/monniaux/BearSSL/tools/vector.c b/test/monniaux/BearSSL/tools/vector.c new file mode 100644 index 00000000..96df3072 --- /dev/null +++ b/test/monniaux/BearSSL/tools/vector.c @@ -0,0 +1,66 @@ +/* + * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org> + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "brssl.h" + +/* + * Prepare a vector buffer for adding 'extra' elements. + * buf current buffer + * esize size of a vector element + * ptr pointer to the 'ptr' vector field + * len pointer to the 'len' vector field + * extra number of elements to add + * + * If the buffer must be enlarged, then this function allocates the new + * buffer and releases the old one. The new buffer address is then returned. + * If the buffer needs not be enlarged, then the buffer address is returned. + * + * In case of enlargement, the 'len' field is adjusted accordingly. The + * 'ptr' field is not modified. + */ +void * +vector_expand(void *buf, + size_t esize, size_t *ptr, size_t *len, size_t extra) +{ + size_t nlen; + void *nbuf; + + if (*len - *ptr >= extra) { + return buf; + } + nlen = (*len << 1); + if (nlen - *ptr < extra) { + nlen = extra + *ptr; + if (nlen < 8) { + nlen = 8; + } + } + nbuf = xmalloc(nlen * esize); + if (buf != NULL) { + memcpy(nbuf, buf, *len * esize); + xfree(buf); + } + *len = nlen; + return nbuf; +} |