user: 请从给定的汇编指令推导出C源代码:

```asm
<lex>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  movl   $0x0,-0x4(%rbp)
L292:
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  mov    %al,-0x5(%rbp)
  cmpl   $0x3,-0x4(%rbp)
  je     L108
  cmpl   $0x3,-0x4(%rbp)
  jg     L213
  cmpl   $0x2,-0x4(%rbp)
  je     L357
  cmpl   $0x2,-0x4(%rbp)
  jg     L213
  cmpl   $0x0,-0x4(%rbp)
  je     L173
  cmpl   $0x1,-0x4(%rbp)
  je     L182
  jmp    L213
L173:
  movsbl -0x5(%rbp),%eax
  mov    %eax,%edi
  call   <isdigit@plt>
  test   %eax,%eax
  je     L128
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  movl   $0x1,-0x4(%rbp)
  jmp    L212
L128:
  movsbl -0x5(%rbp),%eax
  cmp    $0x7e,%eax
  je     L69
  cmp    $0x7e,%eax
  jg     L374
  cmp    $0x76,%eax
  je     L250
  cmp    $0x76,%eax
  jg     L374
  cmp    $0x63,%eax
  je     L208
  cmp    $0x63,%eax
  jg     L374
  cmp    $0x5e,%eax
  je     L64
  cmp    $0x5e,%eax
  jg     L374
  test   %eax,%eax
  je     L35
  test   %eax,%eax
  js     L374
  cmp    $0x3e,%eax
  jg     L374
  cmp    $0x20,%eax
  jl     L374
  sub    $0x20,%eax
  cmp    $0x1e,%eax
  ja     L374
  mov    %eax,%eax
  lea    0x0(,%rax,4),%rdx
  lea    D23(%rip),%rax
  mov    (%rdx,%rax,1),%eax
  cltq
  lea    D23(%rip),%rdx
  add    %rdx,%rax
  notrack jmp *%rax
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  jmp    L411
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  movl   $0x2,-0x4(%rbp)
  jmp    L411
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  mov    $0x100,%eax
  jmp    L242
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  mov    $0x200,%eax
  jmp    L242
L64:
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  mov    $0x300,%eax
  jmp    L242
L250:
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  mov    $0x400,%eax
  jmp    L242
L69:
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  mov    $0x500,%eax
  jmp    L242
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  mov    $0x600,%eax
  jmp    L242
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  mov    $0x700,%eax
  jmp    L242
L208:
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  mov    $0x800,%eax
  jmp    L242
L35:
  mov    $0x900,%eax
  jmp    L242
L374:
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  mov    $0x0,%eax
  jmp    L242
L411:
  jmp    L212
L182:
  movsbl -0x5(%rbp),%eax
  mov    %eax,%edi
  call   <isdigit@plt>
  test   %eax,%eax
  je     L407
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  jmp    L212
L407:
  cmpb   $0x2e,-0x5(%rbp)
  jne    L246
  movl   $0x3,-0x4(%rbp)
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  jmp    L212
L246:
  mov    $0x800,%eax
  jmp    L242
L357:
  movsbl -0x5(%rbp),%eax
  mov    %eax,%edi
  call   <isdigit@plt>
  test   %eax,%eax
  je     L320
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  movl   $0x3,-0x4(%rbp)
  jmp    L212
L320:
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  mov    $0x0,%eax
  jmp    L242
L108:
  movsbl -0x5(%rbp),%eax
  mov    %eax,%edi
  call   <isdigit@plt>
  test   %eax,%eax
  je     L217
  mov    -0x20(%rbp),%rax
  mov    (%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  jmp    L212
L217:
  mov    $0x800,%eax
  jmp    L242
L213:
  lea    D6(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  mov    $0x1,%edi
  call   <exit@plt>
L212:
  jmp    L292
L242:
  leave
  ret
```

tool_calls: name: disassemble_data
arguments: data_label: D6
data_type: string

tool: D6: Lex:Estado indefinido

assistant: ```c
int lex(char *str, int *pos) {
  int estado = 0;
  char c;
  while (1) {
    c = str[*pos];
    switch (estado) {
    case 0:
      if (isdigit(c)) {
        (*pos)++;
        estado = 1;
      } else
        switch (c) {
        case ' ':
          (*pos)++;
          break;
        case '.':
          (*pos)++;
          estado = 2;
          break;
        case '<':
          (*pos)++;
          return 0x0100;
        case '>':
          (*pos)++;
          return 0x0200;
        case '^':
          (*pos)++;
          return 0X0300;
        case 'v':
          (*pos)++;
          return 0x0400;
        case '~':
          (*pos)++;
          return 0x0500;
        case '(':
          (*pos)++;
          return 0x0600;
        case ')':
          (*pos)++;
          return 0x0700;
        case 'c':
          (*pos)++;
          return 0x0800;
        case '\0':
          return 0x0900;
        default:
          (*pos)++;
          return 0x0000;
        }
      break;
    case 1:
      if (isdigit(c))
        (*pos)++;
      else if (c == '.') {
        estado = 3;
        (*pos)++;
      } else {
        return 0x0800;
      }
      break;
    case 2:
      if (isdigit(c)) {
        (*pos)++;
        estado = 3;
      } else {
        (*pos)++;
        return 0x0000;
      }
      break;
    case 3:
      if (isdigit(c))
        (*pos)++;
      else {
        return 0x0800;
      }
      break;
    default:
      printf("Lex:Estado indefinido");
      exit(1);
    }
  }
}
```