73 lines
2.6 KiB
C
73 lines
2.6 KiB
C
/*
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* The copyright in this software is being made available under the 2-clauses
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* BSD License, included below. This software may be subject to other third
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* party and contributor rights, including patent rights, and no such rights
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* are granted under this license.
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*
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* Copyright (c) 2015, Matthieu Darbois
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef OPJ_STRING_H
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#define OPJ_STRING_H
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#include <errno.h>
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#include <string.h>
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/* strnlen is not standard, strlen_s is C11... */
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/* keep in mind there still is a buffer read overflow possible */
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static size_t opj_strnlen_s(const char *src, size_t max_len)
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{
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size_t len;
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if (src == NULL) {
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return 0U;
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}
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for (len = 0U; (*src != '\0') && (len < max_len); src++, len++);
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return len;
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}
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/* should be equivalent to C11 function except for the handler */
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/* keep in mind there still is a buffer read overflow possible */
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static int opj_strcpy_s(char* dst, size_t dst_size, const char* src)
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{
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size_t src_len = 0U;
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if ((dst == NULL) || (dst_size == 0U)) {
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return EINVAL;
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}
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if (src == NULL) {
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dst[0] = '\0';
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return EINVAL;
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}
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src_len = opj_strnlen_s(src, dst_size);
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if (src_len >= dst_size) {
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return ERANGE;
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}
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memcpy(dst, src, src_len);
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dst[src_len] = '\0';
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return 0;
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}
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#endif /* OPJ_STRING_H */
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