94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <sched.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#define __STDC_WANT_IEC_60559_TYPES_EXT__
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#include <float.h>
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#include "time-util.h"
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/* Print information about various types. Useful when diagnosing
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* gcc diagnostics on an unfamiliar architecture. */
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DISABLE_WARNING_TYPE_LIMITS;
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#define info_no_sign(t) \
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printf("%s → %zu bits, %zu byte alignment\n", STRINGIFY(t), \
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sizeof(t)*CHAR_BIT, \
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__alignof__(t))
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#define info(t) \
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printf("%s → %zu bits%s, %zu byte alignment\n", STRINGIFY(t), \
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sizeof(t)*CHAR_BIT, \
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strstr(STRINGIFY(t), "signed") ? "" : \
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(t)-1 < (t)0 ? ", signed" : ", unsigned", \
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__alignof__(t))
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enum Enum {
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enum_value,
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};
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enum BigEnum {
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big_enum_value = UINT64_C(1),
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};
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enum BigEnum2 {
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big_enum2_pos = UINT64_C(1),
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big_enum2_neg = UINT64_C(-1),
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};
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int main(void) {
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int (*function_pointer)(void);
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info_no_sign(function_pointer);
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info_no_sign(void*);
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info(char*);
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info(char);
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info(signed char);
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info(unsigned char);
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info(short unsigned);
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info(unsigned);
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info(long unsigned);
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info(long long unsigned);
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info(__syscall_ulong_t);
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info(__syscall_slong_t);
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info(float);
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info(double);
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info(long double);
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#ifdef FLT128_MAX
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info(_Float128);
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info(_Float64);
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info(_Float64x);
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info(_Float32);
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info(_Float32x);
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#endif
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info(size_t);
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info(ssize_t);
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info(time_t);
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info(usec_t);
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info(__time_t);
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info(pid_t);
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info(uid_t);
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info(gid_t);
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info(socklen_t);
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info(__cpu_mask);
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info(enum Enum);
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info(enum BigEnum);
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info(enum BigEnum2);
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assert_cc(sizeof(enum BigEnum2) == 8);
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printf("big_enum2_pos → %zu\n", sizeof(big_enum2_pos));
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printf("big_enum2_neg → %zu\n", sizeof(big_enum2_neg));
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return 0;
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}
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