user: 这段汇编代码用C语言表示是什么样的？

```asm
<l_str2subst>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x58,%rsp
  mov    %rcx,0x18(%rsp)
  mov    %r8,0x20(%rsp)
  mov    %fs:0x28,%rax
  mov    %rax,0x48(%rsp)
  xor    %eax,%eax
  lea    0x2(%rsi),%eax
  mov    %eax,0x2c(%rsp)
  test   %esi,%esi
  jle    L204
  mov    %edi,%r12d
  mov    %esi,%ebx
  mov    %eax,%edi
  mov    $0x1,%esi
  mov    %rdx,%r14
  call   <calloc@plt>
  mov    %rax,%r13
  test   %rax,%rax
  je     L200
  lea    D4(%rip),%rax
  cmpq   $0x0,0x20(%rsp)
  movsbl %r12b,%r12d
  mov    $0x1,%r8d
  mov    %rax,0x10(%rsp)
  lea    0x3c(%rsp),%rbp
  lea    0x38(%rsp),%r15
  jne    L131
  jmp    L159
  nopl   0x0(%rax,%rax,1)
L21:
  mov    0x20(%rsp),%rsi
  movb   $0x1,(%rsi,%r8,1)
  test   %eax,%eax
  je     L257
L163:
  cmp    %ebx,%eax
  jg     L257
  mov    0x18(%rsp),%rcx
  mov    %al,(%rcx,%r8,1)
  movsbq %al,%rax
  addb   $0x1,0x0(%r13,%rax,1)
  test   %r14,%r14
  je     L127
  add    $0x1,%r8
  cmp    %r8d,%ebx
  jl     L257
L131:
  mov    %r14,%rsi
  mov    %rbp,%rdx
  mov    %r12d,%edi
  mov    $0xc,%ecx
  mov    %r8d,0x28(%rsp)
  mov    %r8,0x8(%rsp)
  call   <l_nextToken@plt>
  mov    0x10(%rsp),%rsi
  mov    %r15,%rdx
  mov    %rbp,%rdi
  mov    %rax,%r14
  call   <sscanf@plt>
  cmp    $0x1,%eax
  jne    L257
  mov    0x38(%rsp),%eax
  mov    0x8(%rsp),%r8
  test   %eax,%eax
  jns    L21
  mov    0x20(%rsp),%rdi
  neg    %eax
  mov    %eax,0x38(%rsp)
  movb   $0xff,(%rdi,%r8,1)
  test   %eax,%eax
  jne    L163
  nopl   (%rax)
L257:
  mov    %r13,%rdi
  call   <free@plt>
L204:
  mov    $0xffffffed,%eax
L29:
  mov    0x48(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L70
  add    $0x58,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L159:
  mov    %r14,%rsi
  mov    %rbp,%rdx
  mov    %r12d,%edi
  mov    $0xc,%ecx
  mov    %r8d,0x28(%rsp)
  mov    %r8,0x8(%rsp)
  call   <l_nextToken@plt>
  mov    0x10(%rsp),%rsi
  mov    %r15,%rdx
  mov    %rbp,%rdi
  mov    %rax,%r14
  call   <sscanf@plt>
  cmp    $0x1,%eax
  jne    L257
  mov    0x38(%rsp),%eax
  mov    0x8(%rsp),%r8
  test   %eax,%eax
  jns    L25
  neg    %eax
  mov    %eax,0x38(%rsp)
L25:
  test   %eax,%eax
  je     L257
  cmp    %eax,%ebx
  jl     L257
  mov    0x18(%rsp),%rsi
  mov    %al,(%rsi,%r8,1)
  movsbq %al,%rax
  addb   $0x1,0x0(%r13,%rax,1)
  test   %r14,%r14
  je     L127
  add    $0x1,%r8
  cmp    %r8d,%ebx
  jge    L159
  jmp    L257
  xchg   %ax,%ax
L127:
  mov    0x28(%rsp),%ecx
  cmp    %ecx,%ebx
  jne    L257
  mov    $0x1,%eax
  add    $0x3,%ecx
  nopl   0x0(%rax)
L84:
  movslq %eax,%rdx
  cmpb   $0x1,0x0(%r13,%rdx,1)
  je     L31
  mov    %ecx,%eax
  cmp    %ecx,0x28(%rsp)
  jge    L84
L60:
  mov    %r13,%rdi
  call   <free@plt>
  mov    0x28(%rsp),%ebx
  cmp    %ebx,0x2c(%rsp)
  jne    L204
  xor    %eax,%eax
  jmp    L29
  nopl   0x0(%rax,%rax,1)
L31:
  lea    0x1(%rax),%edx
  cmp    0x28(%rsp),%edx
  jg     L37
  mov    %edx,%eax
  jmp    L84
  nopl   (%rax)
L37:
  mov    %eax,0x2c(%rsp)
  jmp    L60
L200:
  mov    $0xfffffffd,%eax
  jmp    L29
L70:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: data_label: D4
type: string

tool: D4: %d

assistant: ```c
int l_str2subst(char sep, int max, char *str, char *subst, char *dir) {
  char buf[12];
  char *ch;
  int itmp, i = 0, mmax = max + 2;
  if (!(max > 0))
    return -19;
  if ((ch = calloc(mmax, sizeof(char))) == NULL)
    return -3;
  do {
    if (++i > max)
      break;
    str = l_nextToken(sep, str, buf, 12);
    if (sscanf(buf, "%d", &itmp) != 1) {
      i = -1;
      break;
    }
    if (itmp < 0) {
      itmp = -itmp;
      if (dir != NULL)
        dir[i] = -1;
    } else {
      if (dir != NULL)
        dir[i] = 1;
    }
    if ((itmp > max) || (itmp == 0)) {
      i = -1;
      break;
    }
    ch[subst[i] = itmp]++;
  } while (str != NULL);
  if (i == max) {
    for (i = 1; !(i > max); i++)
      if (ch[i] != 1)
        i = max + 2;
    i--;
  }
  free(ch);
  if (i != max)
    return -19;
  return 0;
}
```