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57 lines
1.8 KiB
C
57 lines
1.8 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/dlopen/dlfcn.h"
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#include "libc/fmt/itoa.h"
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#include "libc/nt/thunk/msabi.h"
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#include "libc/runtime/runtime.h"
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/**
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* @fileoverview cosmopolitan dynamic runtime linking demo
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*
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* Our cosmo_dlopen() interface currently supports:
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*
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* - x86-64 Linux w/ Glibc
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* - x86-64 Linux w/ Musl Libc
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* - x86-64 FreeBSD
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* - x86-64 Windows
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* - x86-64 NetBSD
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* - aarch64 Linux w/ Glibc
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* - aarch64 Linux w/ Musl Libc
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* - aarch64 MacOS
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*
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*/
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int main(int argc, char **argv, char **envp) {
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// open the host system's zlib library
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void *libc = cosmo_dlopen("libz.so", RTLD_LAZY);
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if (!libc) {
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tinyprint(2, cosmo_dlerror(), "\n", NULL);
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exit(1);
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}
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// load crc() function address
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unsigned (*crc32)(unsigned, void *, int) = cosmo_dlsym(libc, "crc32");
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if (!crc32) {
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tinyprint(2, cosmo_dlerror(), "\n", NULL);
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exit(1);
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}
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// compute a checksum and print the result
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char ibuf[12];
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FormatInt32(ibuf, crc32(0, "hi", 2));
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tinyprint(1, "crc(hi) = ", ibuf, "\n", NULL);
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// mop up
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cosmo_dlclose(libc);
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exit(0);
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}
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