user: What would the C source look like for the assembly code provided here?

```asm
<itm_rc4_init>:
  endbr64
  push   %r13
  mov    %rsi,%r11
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdx,%rbx
  test   %r8d,%r8d
  jle    L25
  mov    %rcx,%r10
  test   %rcx,%rcx
  je     L25
  movdqa D58(%rip),%xmm0
  mov    %rdi,%r9
  mov    %rdi,%rcx
  xor    %edx,%edx
  lea    0x100(%rdi),%r12
  xor    %ebp,%ebp
  movups %xmm0,(%rdi)
  movdqa D118(%rip),%xmm0
  movups %xmm0,0x10(%rdi)
  movdqa D150(%rip),%xmm0
  movups %xmm0,0x20(%rdi)
  movdqa D134(%rip),%xmm0
  movups %xmm0,0x30(%rdi)
  movdqa D120(%rip),%xmm0
  movups %xmm0,0x40(%rdi)
  movdqa D60(%rip),%xmm0
  movups %xmm0,0x50(%rdi)
  movdqa D148(%rip),%xmm0
  movups %xmm0,0x60(%rdi)
  movdqa D80(%rip),%xmm0
  movups %xmm0,0x70(%rdi)
  movdqa D9(%rip),%xmm0
  movups %xmm0,0x80(%rdi)
  movdqa D11(%rip),%xmm0
  movups %xmm0,0x90(%rdi)
  movdqa D137(%rip),%xmm0
  movups %xmm0,0xa0(%rdi)
  movdqa D132(%rip),%xmm0
  movups %xmm0,0xb0(%rdi)
  movdqa D136(%rip),%xmm0
  movups %xmm0,0xc0(%rdi)
  movdqa D2(%rip),%xmm0
  movups %xmm0,0xd0(%rdi)
  movdqa D0(%rip),%xmm0
  movups %xmm0,0xe0(%rdi)
  movdqa D145(%rip),%xmm0
  movups %xmm0,0xf0(%rdi)
  xor    %edi,%edi
  nop
L5:
  movzbl (%rcx),%esi
  movslq %edx,%r13
  add    $0x1,%edx
  lea    (%rsi,%rdi,1),%eax
  add    (%r10,%r13,1),%al
  movzbl %al,%edi
  movzbl %al,%eax
  add    %r9,%rax
  cmp    %r8d,%edx
  movzbl (%rax),%r13d
  cmovge %ebp,%edx
  add    $0x1,%rcx
  mov    %r13b,-0x1(%rcx)
  mov    %sil,(%rax)
  cmp    %rcx,%r12
  jne    L5
  xor    %eax,%eax
  mov    %eax,(%r11)
  mov    %eax,(%rbx)
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L25:
  mov    $0xffffffff,%eax
  mov    %eax,(%r11)
  mov    %eax,(%rbx)
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

tool_calls: name: extract_symbolic_data
arguments: label: D58
type: byte[16]
name: extract_symbolic_data
arguments: label: D118
type: byte[16]
name: extract_symbolic_data
arguments: label: D150
type: byte[16]
name: extract_symbolic_data
arguments: label: D134
type: byte[16]
name: extract_symbolic_data
arguments: label: D120
type: byte[16]
name: extract_symbolic_data
arguments: label: D60
type: byte[16]
name: extract_symbolic_data
arguments: label: D148
type: byte[16]
name: extract_symbolic_data
arguments: label: D80
type: byte[16]
name: extract_symbolic_data
arguments: label: D9
type: byte[16]
name: extract_symbolic_data
arguments: label: D11
type: byte[16]
name: extract_symbolic_data
arguments: label: D137
type: byte[16]
name: extract_symbolic_data
arguments: label: D132
type: byte[16]
name: extract_symbolic_data
arguments: label: D136
type: byte[16]
name: extract_symbolic_data
arguments: label: D2
type: byte[16]
name: extract_symbolic_data
arguments: label: D0
type: byte[16]
name: extract_symbolic_data
arguments: label: D145
type: byte[16]

tool: {"D58": [0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f]}

tool: {"D118": [0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f]}

tool: {"D150": [0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f]}

tool: {"D134": [0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f]}

tool: {"D120": [0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f]}

tool: {"D60": [0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f]}

tool: {"D148": [0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f]}

tool: {"D80": [0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f]}

tool: {"D9": [0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f]}

tool: {"D11": [0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f]}

tool: {"D137": [0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf]}

tool: {"D132": [0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf]}

tool: {"D136": [0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf]}

tool: {"D2": [0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdd,0xde,0xdf]}

tool: {"D0": [0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xeb,0xec,0xed,0xee,0xef]}

tool: {"D145": [0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff]}

assistant: ```c
void itm_rc4_init(unsigned char *box, int *x, int *y, const unsigned char *key, int keylen) {
  int X, Y, i, j, k, a;
  if (keylen <= 0 || key == NULL) {
    X = -1;
    Y = -1;
  } else {
    X = Y = 0;
    j = k = 0;
    for (i = 0; i < 256; i++) {
      box[i] = (unsigned char)i;
    }
    for (i = 0; i < 256; i++) {
      a = box[i];
      j = (unsigned char)(j + a + key[k]);
      box[i] = box[j];
      box[j] = a;
      if (++k >= keylen)
        k = 0;
    }
  }
  x[0] = X;
  y[0] = Y;
}
```