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83a1bbf1d3
A lot of the internal library headers don't have include guards because they aren't needed. It might look like a bug, though, and it doesn't hurt to add them. So do this. Update https://github.com/ebiggers/libdeflate/issues/117
89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
/*
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* cpu_features_common.h - code shared by all lib/$arch/cpu_features.c
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*
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* Copyright 2020 Eric Biggers
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef LIB_CPU_FEATURES_COMMON_H
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#define LIB_CPU_FEATURES_COMMON_H
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#if defined(TEST_SUPPORT__DO_NOT_USE) && !defined(FREESTANDING)
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# define _GNU_SOURCE 1 /* for strdup() and strtok_r() */
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# include <stdio.h>
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# include <stdlib.h>
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# include <string.h>
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#endif
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#include "lib_common.h"
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struct cpu_feature {
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u32 bit;
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const char *name;
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};
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#if defined(TEST_SUPPORT__DO_NOT_USE) && !defined(FREESTANDING)
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/* Disable any features that are listed in $LIBDEFLATE_DISABLE_CPU_FEATURES. */
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static inline void
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disable_cpu_features_for_testing(u32 *features,
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const struct cpu_feature *feature_table,
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size_t feature_table_length)
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{
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char *env_value, *strbuf, *p, *saveptr = NULL;
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size_t i;
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env_value = getenv("LIBDEFLATE_DISABLE_CPU_FEATURES");
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if (!env_value)
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return;
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strbuf = strdup(env_value);
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if (!strbuf)
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abort();
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p = strtok_r(strbuf, ",", &saveptr);
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while (p) {
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for (i = 0; i < feature_table_length; i++) {
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if (strcmp(p, feature_table[i].name) == 0) {
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*features &= ~feature_table[i].bit;
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break;
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}
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}
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if (i == feature_table_length) {
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fprintf(stderr,
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"unrecognized feature in LIBDEFLATE_DISABLE_CPU_FEATURES: \"%s\"\n",
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p);
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abort();
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}
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p = strtok_r(NULL, ",", &saveptr);
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}
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free(strbuf);
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}
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#else /* TEST_SUPPORT__DO_NOT_USE */
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static inline void
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disable_cpu_features_for_testing(u32 *features,
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const struct cpu_feature *feature_table,
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size_t feature_table_length)
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{
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}
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#endif /* !TEST_SUPPORT__DO_NOT_USE */
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#endif /* LIB_CPU_FEATURES_COMMON_H */
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