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#if 0
/*─────────────────────────────────────────────────────────────────╗
│ To the extent possible under law, Justine Tunney has waived │
│ all copyright and related or neighboring rights to this file, │
│ as it is written in the following disclaimers: │
│ • http://unlicense.org/ │
│ • http://creativecommons.org/publicdomain/zero/1.0/ │
╚─────────────────────────────────────────────────────────────────*/
#endif
#include "libc/errno.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "third_party/xed/x86.h"
/**
* @fileoverview x86 instruction length decoder by way of hex pipe.
*/
int main(int argc, char *argv[argc]) {
unsigned c, i, j, l;
enum XedError err;
struct XedDecodedInst xedd;
unsigned char buf[XED_MAX_INSTRUCTION_BYTES];
memset(buf, 0, sizeof(buf));
for (i = 0;;) {
if (i < XED_MAX_INSTRUCTION_BYTES) {
c = fgethex(stdin);
if (c != -1) {
buf[i++] = c;
continue;
} else if (i == 0) {
break;
}
}
if ((err = xed_instruction_length_decode(
xed_decoded_inst_zero_set_mode(&xedd, XED_MACHINE_MODE_LONG_64),
buf, i))) {
errno = err;
break;
}
l = xedd.length;
if (l <= 0 || l > i) abort();
for (j = 0; j < l; ++j) {
if (fputhex(buf[j], stdout) == -1) {
return errno;
}
}
putchar('\n');
memcpy(&buf[0], &buf[l], i -= l);
}
return errno;
}