mirror of
https://github.com/mstorsjo/llvm-mingw
synced 2026-06-21 14:01:00 +00:00
Martin Storsjö
65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/*
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* Copyright (c) 2018 Martin Storsjo
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*
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* This file is part of llvm-mingw.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <stdio.h>
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#include <setjmp.h>
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#include <stdlib.h>
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#include <math.h>
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jmp_buf jmp;
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int fibonacci(int val) {
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char buf[100];
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if (val <= 1) {
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longjmp(jmp, 1);
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return val;
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}
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snprintf(buf, sizeof(buf), "fibonacci(%d)", val);
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printf("%s\n", buf);
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return fibonacci(val - 1) + fibonacci(val - 2);
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}
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double check_d, check_cos;
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int main(int argc, char* argv[]) {
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int val = 10, ret;
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double val2 = 3.14;
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if (argc > 1)
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val = atoi(argv[1]);
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if (argc > 2)
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val2 = atof(argv[2]);
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double d = sin(val2);
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printf("d = %f\n", d);
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printf("cos = %f\n", cos(val2));
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printf("size = %d, %p\n", (int) sizeof(jmp), jmp);
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check_d = d;
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check_cos = cos(val2);
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if ((ret = setjmp(jmp)) != 0) {
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printf("setjmp returned %d\n", ret);
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printf("d = %f\n", d);
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printf("cos = %f\n", cos(val2));
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if (d != check_d || cos(val2) != check_cos) {
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printf("local variables were clobbered\n");
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return 1;
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}
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return 0;
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}
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printf("fibonacci(%d) = %d\n", val, fibonacci(val));
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return 1;
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}
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