Minix1.1/usr/src/commands/libupack.c

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char *table[] = {
"push ax",
"ret",
"mov bp,sp",
"push bp",
"pop bp",
"mov sp,bp",
".text",
"xor ax,ax",
"push 4(bp)",
"pop bx",
"pop si",
"cbw",
"movb al,(bx)",
"pop ax",
"xorb ah,ah",
"mov ax,#1",
"call _callm1",
"add sp,#16",
"mov bx,4(bp)",
"push 6(bp)",
"mov -2(bp),ax",
"I0013:",
"call .cuu",
"mov ax,-2(bp)",
"add 4(bp),#1",
"or ax,ax",
"jmp I0011",
"mov bx,8(bp)",
"push dx",
"mov cx,#2",
"mov bx,#2",
"I0011:",
"I0012:",
"push -2(bp)",
"mov ax,4(bp)",
"mov ax,-4(bp)",
"add sp,#6",
"and ax,#255",
"push bx",
"mov bx,-2(bp)",
"loop 2b",
"jcxz 1f",
".word 4112",
"mov ax,(bx)",
"mov -4(bp),ax",
"jmp I0013",
".data",
"mov bx,6(bp)",
"mov (bx),ax",
"je I0012",
".word 8224",
".bss",
"mov ax,#2",
"call _len",
"call _callx",
".word 28494",
".word 0",
"push -4(bp)",
"movb (bx),al",
"mov bx,ax",
"mov -2(bp),#0",
"I0016:",
".word 514",
".word 257",
"mov ",
"push ",
".word ",
"pop ",
"add ",
"4(bp)",
"-2(bp)",
"(bx)",
".define ",
".globl ",
"movb ",
"xor ",
"jmp ",
"cmp ",
"6(bp)",
"-4(bp)",
"-6(bp)",
"#16",
"_callm1",
"call ",
"8(bp)",
"xorb ",
"and ",
"sub ",
"-8(bp)",
"jne ",
".cuu",
"lea ",
"inc ",
"_M+10",
"#255",
"loop",
"jcxz",
"ax,#",
"bx,#",
"cx,#",
"ax,",
"bx,",
"cx,",
"dx,",
"si,",
"di,",
"bp,",
"ax",
"bx",
"cx",
"dx",
"si",
"di",
"bp",
"sp",
"dec ",
"neg ",
"_execve",
",#0",
0};

#define IBUFSIZE 10000
#define OBUFSIZE 30000

char input[IBUFSIZE+1], output[OBUFSIZE+1];

main()
{
  int n, count;

  while (1) {
	n = read(0, input,IBUFSIZE);
	if (n <= 0) exit(1);
	input[n] = 0;
	count = unpack88(input, output);
	n = write(1, output, count);
  }
}

unpack88(inp, outp)
register char *inp, *outp;
{

  register k;
  char *p, *orig;

  orig = outp;
  while (*inp != 0) {
	k = *inp & 0377;
	if (k < 128) {
		*outp++ = *inp++;
	} else {
		p = table[k-128];
		while (*p != 0) *outp++ = *p++;
		*inp++;
	}
  }
  return(outp - orig);
}