3042bbebdd
https://hamberg.no/erlend/posts/2013-02-18-static-array-indices.html This only works with clang, unfortunately gcc doesn't seem to implement the check (tested with gcc-8.2.1-5.fc29.x86_64). Simulated error: [2/3] Compiling C object 'systemd-nspawn@exe/src_nspawn_nspawn.c.o'. ../src/nspawn/nspawn.c:3179:45: warning: array argument is too small; contains 15 elements, callee requires at least 16 [-Warray-bounds] candidate = (uid_t) siphash24(arg_machine, strlen(arg_machine), hash_key); ^ ~~~~~~~~ ../src/basic/siphash24.h:24:64: note: callee declares array parameter as static here uint64_t siphash24(const void *in, size_t inlen, const uint8_t k[static 16]); ^~~~~~~~~~~~
29 lines
796 B
C
29 lines
796 B
C
#pragma once
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#include <inttypes.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include <sys/types.h>
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struct siphash {
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uint64_t v0;
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uint64_t v1;
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uint64_t v2;
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uint64_t v3;
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uint64_t padding;
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size_t inlen;
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};
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void siphash24_init(struct siphash *state, const uint8_t k[static 16]);
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void siphash24_compress(const void *in, size_t inlen, struct siphash *state);
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#define siphash24_compress_byte(byte, state) siphash24_compress((const uint8_t[]) { (byte) }, 1, (state))
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uint64_t siphash24_finalize(struct siphash *state);
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uint64_t siphash24(const void *in, size_t inlen, const uint8_t k[static 16]);
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static inline uint64_t siphash24_string(const char *s, const uint8_t k[static 16]) {
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return siphash24(s, strlen(s) + 1, k);
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}
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