68 lines
2.2 KiB
C
68 lines
2.2 KiB
C
#if 0
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/*─────────────────────────────────────────────────────────────────╗
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│ To the extent possible under law, Justine Tunney has waived │
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│ all copyright and related or neighboring rights to this file, │
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│ as it is written in the following disclaimers: │
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│ • http://unlicense.org/ │
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│ • http://creativecommons.org/publicdomain/zero/1.0/ │
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╚─────────────────────────────────────────────────────────────────*/
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#endif
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#include "libc/calls/calls.h"
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#include "libc/log/check.h"
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#include "libc/log/color.h"
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#include "libc/log/log.h"
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#include "libc/mem/mem.h"
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#include "libc/runtime/gc.h"
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/exit.h"
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#include "libc/sysv/consts/fileno.h"
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#include "libc/sysv/consts/sig.h"
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#define kTutorialMessage "This echos stdio until Ctrl+C is pressed.\n"
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#define kVictoryMessage "\rGot Ctrl+C and longjmp() ran dtors (>'.')>\n"
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jmp_buf jb;
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void GotCtrlC(int sig) {
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gclongjmp(jb, 1);
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unreachable;
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}
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size_t HowManyBytesOfHeapMemoryAreAllocated(void) {
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return mallinfo().uordblks;
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}
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void ReadAndPrintLinesLoop(void) {
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ssize_t got;
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unsigned char *buf;
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buf = gc(malloc(BUFSIZ));
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CHECK_NE(0, HowManyBytesOfHeapMemoryAreAllocated());
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for (;;) {
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CHECK_NE(-1, (got = read(STDIN_FILENO, buf, BUFSIZ)));
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CHECK_EQ(got, write(STDOUT_FILENO, buf, got));
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}
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}
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int main(int argc, char *argv[]) {
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int rc;
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rc = 0;
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showcrashreports();
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if (cancolor()) {
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CHECK_EQ(0 /* cosmo runtime doesn't link malloc */,
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HowManyBytesOfHeapMemoryAreAllocated());
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puts("This echos stdio until Ctrl+C is pressed.");
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if (!(rc = setjmp(jb))) {
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CHECK_NE(SIG_ERR, signal(SIGINT, GotCtrlC));
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ReadAndPrintLinesLoop();
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unreachable;
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} else {
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--rc;
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}
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CHECK_EQ(0, HowManyBytesOfHeapMemoryAreAllocated());
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puts("\rGot Ctrl+C and longjmp() ran dtors (>'.')>");
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}
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return rc;
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}
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