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Copy pathhexdump.c
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hexdump.c
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/* ==========================================================================
* hexdump.c - hexdump.c
* --------------------------------------------------------------------------
* Copyright (c) 2013 William Ahern
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to permit
* persons to whom the Software is furnished to do so, subject to the
* following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
* NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
* ==========================================================================
*/
#if __STDC__ && !_XOPEN_SOURCE
#define _XOPEN_SOURCE 600 /* _setjmp(3), _longjmp(3), getopt(3) */
#endif
#include <limits.h> /* INT_MAX */
#include <stdint.h> /* int64_t */
#include <stdio.h> /* FILE fprintf(3) snprintf(3) */
#include <stdlib.h> /* malloc(3) realloc(3) free(3) abort(3) */
#include <string.h> /* memset(3) memmove(3) */
#include <errno.h> /* ERANGE errno */
#include <setjmp.h> /* _setjmp(3) _longjmp(3) */
#include "hexdump.h"
#define SAY_(fmt, ...) fprintf(stderr, fmt "%s", __FILE__, __LINE__, __func__, __VA_ARGS__);
#define SAY(...) SAY_("@@ %s:%d:%s: " __VA_ARGS__, "\n");
#define HAI SAY("HAI")
#define OOPS(...) do { \
SAY(__VA_ARGS__); \
abort(); \
} while (0)
#ifndef MIN
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#endif
#ifndef MAX
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
#endif
#define countof(a) (sizeof (a) / sizeof *(a))
#ifndef NOTUSED
#if __GNUC__
#define NOTUSED __attribute__((unused))
#else
#define NOTUSED
#endif
#endif
#ifndef NORETURN
#if __GNUC__
#define NORETURN __attribute__((noreturn))
#else
#define NORETURN
#endif
#endif
#define NARG_(a, b, c, d, e, f, g, h, N,...) N
#define NARG(...) NARG_(__VA_ARGS__, 8, 7, 6, 5, 4, 3, 2, 1, 0)
#define PASTE(x, y) x##y
#define XPASTE(x, y) PASTE(x, y)
static unsigned char toprint(unsigned char chr) {
return (chr > 0x1f && chr < 0x7f)? chr : '.';
} /* toprint() */
static const char *tooctal(char buf[3], unsigned char chr) {
if (chr > 0x1f && chr < 0x7f) {
buf[0] = chr;
buf[1] = '\0';
} else {
switch (chr) {
case '\0':
buf[0] = '\\';
buf[1] = '0';
buf[2] = '\0';
break;
case '\a':
buf[0] = '\\';
buf[1] = 'a';
buf[2] = '\0';
break;
case '\b':
buf[0] = '\\';
buf[1] = 'b';
buf[2] = '\0';
break;
case '\f':
buf[0] = '\\';
buf[1] = 'f';
buf[2] = '\0';
break;
case '\n':
buf[0] = '\\';
buf[1] = 'n';
buf[2] = '\0';
break;
case '\r':
buf[0] = '\\';
buf[1] = 'r';
buf[2] = '\0';
break;
case '\t':
buf[0] = '\\';
buf[1] = 't';
buf[2] = '\0';
break;
case '\v':
buf[0] = '\\';
buf[1] = 'v';
buf[2] = '\0';
break;
default:
buf[0] = "01234567"[0x7 & (chr >> 6)];
buf[1] = "01234567"[0x7 & (chr >> 3)];
buf[2] = "01234567"[0x7 & (chr >> 0)];
break;
}
}
return buf;
} /* tooctal() */
static const char *toshort(char buf[3], unsigned char chr) {
static const char map[][3] = {
[0x00] = "nul", [0x01] = "soh", [0x02] = "stx", [0x03] = "etx",
[0x04] = "eot", [0x05] = "enq", [0x06] = "ack", [0x07] = "bel",
[0x08] = "bs", [0x09] = "ht", [0x0a] = "lf", [0x0b] = "vt",
[0x0c] = "ff", [0x0d] = "cr", [0x0e] = "so", [0x0f] = "si",
[0x10] = "dle", [0x11] = "dc1", [0x12] = "dc2", [0x13] = "dc3",
[0x14] = "dc4", [0x15] = "nak", [0x16] = "syn", [0x17] = "etb",
[0x18] = "can", [0x19] = "em", [0x1a] = "sub", [0x1b] = "esc",
[0x1c] = "fs", [0x1d] = "gs", [0x1e] = "rs", [0x1f] = "us",
[0x7f] = "del",
};
if (chr <= 0x1f || chr == 0x7f) {
memcpy(buf, map[chr], 3);
} else if (chr < 0x7f) {
buf[0] = chr;
buf[1] = '\0';
} else {
buf[0] = "0123456789abcdef"[0x0f & (chr >> 4)];
buf[1] = "0123456789abcdef"[0x0f & chr];
buf[2] = '\0';
}
return buf;
} /* toshort() */
static inline _Bool hxd_isspace(unsigned char chr, _Bool nlok) {
static const unsigned char space[] = {
['\t'] = 1, ['\n'] = 1, ['\v'] = 1, ['\r'] = 1, ['\f'] = 1, [' '] = 1,
};
return (chr < sizeof space && space[chr] && (nlok || chr != '\n'));
} /* hxd_isspace() */
static inline unsigned char skipws(const unsigned char **fmt, _Bool nlok) {
while (hxd_isspace(**fmt, nlok))
++*fmt;
return **fmt;
} /* skipws() */
static inline int getint(const unsigned char **fmt) {
static const int limit = ((INT_MAX - (INT_MAX % 10) - 1) / 10);
int i = -1;
if (**fmt >= '0' && **fmt <= '9') {
i = 0;
do {
i *= 10;
i += **fmt - '0';
++*fmt;
} while (**fmt >= '0' && **fmt <= '9' && i <= limit);
}
return i;
} /* getint() */
#define F_HASH 1
#define F_ZERO 2
#define F_MINUS 4
#define F_SPACE 8
#define F_PLUS 16
#define FC2(x, y) (((0xff & (y)) << 8) | (0xff & (x)))
#define FC1(x) (0xff & (x))
#define FC(...) XPASTE(FC, NARG(__VA_ARGS__))(__VA_ARGS__)
static inline int getcnv(int *flags, int *width, int *prec, int *bytes, const unsigned char **fmt) {
int ch;
*flags = 0;
for (; (ch = **fmt); ++*fmt) {
switch (ch) {
case '#':
*flags |= F_HASH;
break;
case '0':
*flags |= F_ZERO;
break;
case '-':
*flags |= F_MINUS;
break;
case ' ':
*flags |= F_SPACE;
break;
case '+':
*flags |= F_PLUS;
break;
default:
goto width;
} /* switch() */
}
width:
*width = getint(fmt);
*prec = (**fmt == '.')? (++*fmt, getint(fmt)) : -1;
*bytes = 0;
switch ((ch = **fmt)) {
case '%':
break;
case 'c':
*bytes = 1;
break;
case 'd': case 'i': case 'o': case 'u': case 'X': case 'x':
*bytes = 4;
break;
case 's':
if (*prec == -1)
return 0;
*bytes = *prec;
break;
case '_':
switch (*++*fmt) {
case 'a':
switch (*++*fmt) {
case 'd':
ch = FC('_', 'd');
break;
case 'o':
ch = FC('_', 'o');
break;
case 'x':
ch = FC('_', 'x');
break;
default:
return 0;
}
*bytes = 0;
break;
case 'A':
switch (*++*fmt) {
case 'd':
ch = FC('_', 'D');
break;
case 'o':
ch = FC('_', 'O');
break;
case 'x':
ch = FC('_', 'X');
break;
default:
return 0;
}
*bytes = 0;
/* XXX: Not supported yet. */
return 0;
break;
case 'c':
ch = FC('_', 'c');
*bytes = 1;
break;
case 'p':
ch = FC('_', 'p');
*bytes = 1;
break;
case 'u':
ch = FC('_', 'u');
*bytes = 1;
break;
default:
return 0;
}
break;
} /* switch() */
++*fmt;
return ch;
} /* getcnv() */
enum vm_opcode {
OP_HALT, /* 0/0 */
OP_NOOP, /* 0/0 */
OP_TRAP, /* 0/0 */
OP_PC, /* 0/1 | push program counter */
OP_TRUE, /* 0/1 | push true */
OP_FALSE, /* 0/1 | push false */
OP_ZERO, /* 0/1 | push 0 */
OP_ONE, /* 0/1 | push 1 */
OP_TWO, /* 0/1 | push 2 */
OP_I8, /* 0/1 | load 8-bit unsigned int from code */
OP_I16, /* 0/1 | load 16-bit unsigned int from code */
OP_I32, /* 0/1 | load 32-bit unsigned int from code */
OP_NEG, /* 1/1 | arithmetic negative */
OP_SUB, /* 2/1 | S(-2) - S(-1) */
OP_ADD, /* 2/1 | S(-2) + S(-1) */
OP_NOT, /* 1/1 | logical not */
OP_OR, /* 2/1 | logical or */
OP_LT, /* 2/1 | S(-2) < S(-1) */
OP_POP, /* 1/0 | pop top of stack */
OP_DUP, /* 1/2 | dup top of stack */
OP_SWAP, /* 2/2 | swap values at top of stack */
OP_READ, /* 1/1 | read bytes from input buffer */
OP_COUNT, /* 0/1 | count of bytes in input buffer */
OP_PUTC, /* 0/0 | copy char directly to output buffer */
OP_CONV, /* 5/0 | write conversion to output buffer */
OP_CHOP, /* 1/0 | chop trailing characters from output buffer */
OP_PAD, /* 1/0 | emit padding space to output buffer */
OP_JMP, /* 2/0 | conditional jump to address */
OP_RESET, /* 0/0 | reset input buffer position */
/*
* Optimized conversions with predicates.
*/
#define OK_IS0FIXED(F, W, P, N) \
(((W) == (N) && ((F) == F_ZERO) && (P) <= 0) || \
((W) == -1 && (P) == (N)) || \
((W) == (P) && (W) == (N)))
#define OK_2XBYTE(F, W, P) OK_IS0FIXED((F), (W), (P), 2)
OP_2XBYTE,
#define OK_PBYTE(F, W, P) ((W) <= 1 && (P) <= 1)
OP_PBYTE,
#define OK_7XADDR(F, W, P) OK_IS0FIXED((F), (W), (P), 7)
OP_7XADDR,
#define OK_8XADDR(F, W, P) OK_IS0FIXED((F), (W), (P), 8)
OP_8XADDR,
}; /* enum vm_opcode */
static const char *vm_strop(enum vm_opcode op) {
static const char *txt[] = {
[OP_HALT] = "HALT",
[OP_NOOP] = "NOOP",
[OP_TRAP] = "TRAP",
[OP_PC] = "PC",
[OP_TRUE] = "TRUE",
[OP_FALSE] = "FALSE",
[OP_ZERO] = "ZERO",
[OP_ONE] = "ONE",
[OP_TWO] = "TWO",
[OP_I8] = "I8",
[OP_I16] = "I16",
[OP_I32] = "I32",
[OP_NEG] = "NEG",
[OP_SUB] = "SUB",
[OP_ADD] = "ADD",
[OP_NOT] = "NOT",
[OP_OR] = "OR",
[OP_LT] = "LT",
[OP_POP] = "POP",
[OP_DUP] = "DUP",
[OP_SWAP] = "SWAP",
[OP_READ] = "READ",
[OP_COUNT] = "COUNT",
[OP_PUTC] = "PUTC",
[OP_CONV] = "CONV",
[OP_CHOP] = "CHOP",
[OP_PAD] = "PAD",
[OP_JMP] = "JMP",
[OP_RESET] = "RESET",
[OP_2XBYTE] = "2XBYTE",
[OP_PBYTE] = "PBYTE",
[OP_7XADDR] = "7XADDR",
[OP_8XADDR] = "8XADDR",
};
if ((int)op >= 0 && op < (int)countof(txt) && txt[op])
return txt[op];
else
return "-";
} /* vm_strop() */
struct vm_state {
jmp_buf trap;
int flags;
size_t blocksize;
int64_t stack[8];
int sp;
unsigned char code[4096];
int pc;
struct {
unsigned char *base, *p, *pe;
size_t address;
_Bool eof;
} i;
struct {
unsigned char *base, *p, *pe;
} o;
}; /* struct vm_state */
NOTUSED static void op_dump(struct vm_state *M, int *pc, FILE *fp) {
enum vm_opcode op = M->code[*pc];
unsigned n;
fprintf(fp, "%d: ", *pc);
switch (op) {
case OP_I8:
fprintf(fp, "%s %u\n", vm_strop(op), (unsigned)M->code[++*pc]);
break;
case OP_I16:
n = M->code[++*pc] << 8;
n |= M->code[++*pc];
fprintf(fp, "%s %u\n", vm_strop(op), n);
break;
case OP_I32:
n = M->code[++*pc] << 24;
n |= M->code[++*pc] << 16;
n |= M->code[++*pc] << 8;
n |= M->code[++*pc] << 0;
fprintf(fp, "%s %u\n", vm_strop(op), n);
break;
case OP_PUTC: {
const char *txt = vm_strop(op);
int chr = M->code[++*pc];
switch (chr) {
case '\n':
fprintf(fp, "%s \\n (0x0a)\n", txt);
break;
case '\r':
fprintf(fp, "%s \\r (0x0d)\n", txt);
break;
case '\t':
fprintf(fp, "%s \\t (0x09)\n", txt);
break;
default:
if (chr > 31 && chr < 127)
fprintf(fp, "%s %c (0x%.2x)\n", txt, chr, chr);
else
fprintf(fp, "%s . (0x%.2x)\n", txt, chr);
break;
} /* switch() */
break;
}
default:
fprintf(fp, "%s\n", vm_strop(op));
break;
} /* switch() */
++*pc;
} /* op_dump() */
NOTUSED static void vm_dump(struct vm_state *M, FILE *fp) {
enum vm_opcode op;
int pc = 0;
fprintf(fp, "-- blocksize: %zu\n", M->blocksize);
do {
op = M->code[pc];
op_dump(M, &pc, fp);
} while (op != OP_HALT);
} /* vm_dump() */
#ifdef _WIN32
#define vm_enter(M) setjmp((M)->trap)
#else
#define vm_enter(M) _setjmp((M)->trap)
#endif
NORETURN static void vm_throw(struct vm_state *M, int error) {
#ifdef _WIN32
longjmp(M->trap, error);
#else
_longjmp(M->trap, error);
#endif
} /* vm_throw() */
static inline unsigned char vm_getc(struct vm_state *M) {
return (M->i.p < M->i.pe)? *M->i.p++ : 0;
} /* vm_getc() */
static void vm_putc(struct vm_state *M, unsigned char ch) {
unsigned char *tmp;
size_t size, p;
if (!(M->o.p < M->o.pe)) {
size = MAX(M->o.pe - M->o.base, 64);
p = M->o.p - M->o.base;
if (~size < size)
vm_throw(M, ENOMEM);
size *= 2;
if (!(tmp = realloc(M->o.base, size)))
vm_throw(M, errno);
M->o.base = tmp;
M->o.p = &tmp[p];
M->o.pe = &tmp[size];
}
*M->o.p++ = ch;
} /* vm_putc() */
static void vm_putx(struct vm_state *M, unsigned char ch) {
vm_putc(M, "0123456789abcdef"[0x0f & (ch >> 4)]);
vm_putc(M, "0123456789abcdef"[0x0f & (ch >> 0)]);
} /* vm_putx() */
static inline size_t vm_address(struct vm_state *M) {
return M->i.address + (M->i.p - M->i.base);
} /* vm_address() */
static void vm_push(struct vm_state *M, int64_t v) {
M->stack[M->sp++] = v;
} /* vm_push() */
static int64_t vm_pop(struct vm_state *M) {
return M->stack[--M->sp];
} /* vm_pop() */
NOTUSED static int64_t vm_peek(struct vm_state *M, int i) {
return (i < 0)? M->stack[M->sp + i] : M->stack[i];
} /* vm_peek() */
static void vm_conv(struct vm_state *M, int flags, int width, int prec, int fc, int64_t word) {
char fmt[32], *fp, buf[256], label[3];
const char *s = NULL;
int i, len;
switch (fc) {
case FC('_', 'c'):
s = tooctal(label, word);
prec = (prec > 0)? MIN(prec, 3) : 3;
fc = 's';
break;
case FC('_', 'p'):
word = toprint(word);
fc = 'c';
break;
case FC('_', 'u'):
s = toshort(label, word);
prec = (prec > 0)? MIN(prec, 3) : 3;
fc = 's';
break;
case FC('_', 'd'):
word = M->i.address + (M->i.p - M->i.base);
fc = 'd';
break;
case FC('_', 'o'):
word = M->i.address + (M->i.p - M->i.base);
fc = 'o';
break;
case FC('_', 'x'):
word = M->i.address + (M->i.p - M->i.base);
fc = 'x';
break;
case FC('_', 'D'):
/* FALL THROUGH */
case FC('_', 'O'):
/* FALL THROUGH */
case FC('_', 'X'):
fc = 'x';
vm_throw(M, HXD_ENOTSUPP);
break;
case FC('s'):
s = (const char *)M->i.p;
if (prec <= 0 || prec > M->i.pe - M->i.p)
prec = M->i.pe - M->i.p;
break;
case FC('c'):
/* FALL THROUGH */
case FC('d'): case FC('i'): case FC('o'):
case FC('u'): case FC('X'): case FC('x'):
break;
default:
vm_throw(M, HXD_ENOTSUPP);
break;
} /* switch() */
fp = fmt;
*fp++ = '%';
if (flags & F_HASH)
*fp++ = '#';
if (flags & F_ZERO)
*fp++ = '0';
if (flags & F_MINUS)
*fp++ = '-';
if (flags & F_PLUS)
*fp++ = '+';
*fp++ = '*';
*fp++ = '.';
*fp++ = '*';
*fp++ = fc;
*fp = '\0';
switch (fc) {
case 's':
len = snprintf(buf, sizeof buf, fmt, MAX(width, 0), MAX(prec, 0), s);
break;
case 'u':
len = snprintf(buf, sizeof buf, fmt, MAX(width, 0), prec, (unsigned)word);
break;
default:
len = snprintf(buf, sizeof buf, fmt, MAX(width, 0), prec, (int)word);
break;
}
if (-1 == len)
vm_throw(M, errno);
if (len >= (int)sizeof buf)
vm_throw(M, ENOMEM);
for (i = 0; i < len; i++)
vm_putc(M, buf[i]);
} /* vm_conv() */
#define VM_FASTER defined(__GNUC__)
#if VM_FASTER
#define BEGIN goto *jump[M->code[M->pc]]
#define END (void)0
#define CASE(op) XPASTE(OP_, op)
#define NEXT goto *jump[M->code[++M->pc]]
#else
#define BEGIN exec: switch (M->code[M->pc]) {
#define END } (void)0
#define CASE(op) case XPASTE(OP_, op)
#define NEXT ++M->pc; goto exec
#endif
static void vm_exec(struct vm_state *M) {
#if VM_FASTER
#define L(L) (&&XPASTE(OP_, L))
static const void *const jump[] = {
L(HALT), L(NOOP), L(TRAP), L(PC), L(TRUE), L(FALSE),
L(ZERO), L(ONE), L(TWO), L(I8), L(I16), L(I32),
L(NEG), L(SUB), L(ADD), L(NOT), L(OR), L(LT),
L(POP), L(DUP), L(SWAP), L(READ), L(COUNT), L(PUTC), L(CONV),
L(CHOP), L(PAD), L(JMP), L(RESET),
L(2XBYTE), L(PBYTE), L(7XADDR), L(8XADDR),
};
#endif
int64_t v;
BEGIN;
CASE(HALT):
return /* void */;
CASE(NOOP):
NEXT;
CASE(TRAP):
vm_throw(M, HXD_EOOPS);
NEXT;
CASE(PC):
vm_push(M, M->pc);
NEXT;
CASE(TRUE):
vm_push(M, 1);
NEXT;
CASE(FALSE):
vm_push(M, 0);
NEXT;
CASE(ZERO):
vm_push(M, 0);
NEXT;
CASE(ONE):
vm_push(M, 1);
NEXT;
CASE(TWO):
vm_push(M, 2);
NEXT;
CASE(I8):
vm_push(M, M->code[++M->pc]);
NEXT;
CASE(I16):
v = M->code[++M->pc] << 8;
v |= M->code[++M->pc];
vm_push(M, v);
NEXT;
CASE(I32):
v = M->code[++M->pc] << 24;
v = M->code[++M->pc] << 16;
v = M->code[++M->pc] << 8;
v |= M->code[++M->pc];
vm_push(M, v);
NEXT;
CASE(NEG):
vm_push(M, -vm_pop(M));
NEXT;
CASE(SUB): {
int64_t b = vm_pop(M);
int64_t a = vm_pop(M);
vm_push(M, a - b);
NEXT;
}
CASE(ADD): {
int64_t b = vm_pop(M);
int64_t a = vm_pop(M);
vm_push(M, a + b);
NEXT;
}
CASE(NOT):
vm_push(M, !vm_pop(M));
NEXT;
CASE(OR): {
int64_t b = vm_pop(M);
int64_t a = vm_pop(M);
vm_push(M, a || b);
NEXT;
}
CASE(LT): {
int64_t b = vm_pop(M);
int64_t a = vm_pop(M);
vm_push(M, a < b);
NEXT;
}
CASE(POP):
vm_pop(M);
NEXT;
CASE(DUP): {
int64_t v = vm_pop(M);
vm_push(M, v);
vm_push(M, v);
NEXT;
}
CASE(SWAP): {
int64_t x = vm_pop(M);
int64_t y = vm_pop(M);
vm_push(M, x);
vm_push(M, y);
NEXT;
}
CASE(READ): {
int64_t i, n, v;
n = vm_pop(M);
v = 0;
if (M->flags & HXD_BIG_ENDIAN) {
for (i = 0; i < n && M->i.p < M->i.pe; i++) {
v <<= 8;
v |= *M->i.p++;
}
} else {
for (i = 0; i < n && M->i.p < M->i.pe; i++) {
v |= *M->i.p++ << (8 * i);
}
}
vm_push(M, v);
NEXT;
}
CASE(COUNT):
vm_push(M, M->i.pe - M->i.p);
NEXT;
CASE(PUTC): {
vm_putc(M, M->code[++M->pc]);
NEXT;
}
CASE(CONV): {
int fc = vm_pop(M);
int prec = vm_pop(M);
int width = vm_pop(M);
int flags = vm_pop(M);
int64_t word = vm_pop(M);
vm_conv(M, flags, width, prec, fc, word);
NEXT;
}
CASE(CHOP):
v = vm_pop(M);
while (v > 0 && M->o.p > M->o.base) {
--M->o.p;
--v;
}
NEXT;
CASE(PAD):
v = vm_pop(M);
while (v-- > 0)
vm_putc(M, ' ');
NEXT;
CASE(JMP): {
int64_t pc = vm_pop(M);
if (vm_pop(M)) {
M->pc = pc % countof(M->code);
#if VM_FASTER
goto *jump[M->code[pc]];
#else
goto exec;
#endif
}
NEXT;
}
CASE(RESET):
M->i.p = M->i.base;
NEXT;
CASE(2XBYTE):
vm_putx(M, vm_getc(M));
NEXT;
CASE(PBYTE):
vm_putc(M, toprint(vm_getc(M)));
NEXT;
CASE(7XADDR): {
size_t addr = vm_address(M);
vm_putc(M, "0123456789abcdef"[0x0f & (addr >> 24)]);
vm_putx(M, (addr >> 16));
vm_putx(M, (addr >> 8));
vm_putx(M, (addr >> 0));
NEXT;
}
CASE(8XADDR): {
size_t addr = vm_address(M);
vm_putx(M, (addr >> 24));
vm_putx(M, (addr >> 16));
vm_putx(M, (addr >> 8));
vm_putx(M, (addr >> 0));
NEXT;
}
END;
} /* vm_exec() */
static void emit_op(struct vm_state *M, unsigned char code) {
if (M->pc >= (int)sizeof M->code - 1)
vm_throw(M, ENOMEM);
M->code[M->pc++] = code;
} /* emit_op() */
static void emit_int(struct vm_state *M, int64_t i) {
_Bool isneg;
if ((isneg = (i < 0)))
i *= -1;
if (i > ((1LL << 32) - 1)) {
vm_throw(M, ERANGE);
} else if (i > ((1LL << 16) - 1)) {
emit_op(M, OP_I32);
emit_op(M, 0xff & (i >> 24));
emit_op(M, 0xff & (i >> 16));
emit_op(M, 0xff & (i >> 8));
emit_op(M, 0xff & (i >> 0));
} else if (i > ((1LL << 8) - 1)) {
emit_op(M, OP_I16);
emit_op(M, 0xff & (i >> 8));
emit_op(M, 0xff & (i >> 0));
} else {
switch (i) {
case 0:
emit_op(M, OP_ZERO);