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

```asm
<file_cvt>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  lea    D33(%rip),%r13
  push   %r12
  mov    %rsi,%r12
  push   %rbp
  mov    $0x8,%ebp
  push   %rbx
  lea    0x1(%rdi),%rbx
  sub    $0x18,%rsp
  movzbl (%rdi),%r15d
  movl   $0x0,0xc(%rsp)
  test   %r15b,%r15b
  jne    L4
  jmp    L91
  nopl   0x0(%rax,%rax,1)
L215:
  test   %ebp,%ebp
  je     L140
  mov    %r15b,(%r12)
  sub    $0x1,%ebp
  add    $0x1,%r12
L140:
  movzbl (%rbx),%r15d
  add    $0x1,%rbx
  test   %r15b,%r15b
  je     L134
L4:
  lea    -0x1(%rbx),%rax
  mov    %rax,(%rsp)
  lea    -0x20(%r15),%eax
  cmp    $0x5e,%al
  ja     L13
  movzbl %r15b,%r14d
  mov    %r13,%rdi
  mov    %r14d,%esi
  call   <strchr@plt>
  test   %rax,%rax
  jne    L13
  cmp    $0x2e,%r15b
  je     L73
  cmp    $0x5c,%r15b
  je     L128
  mov    %r14d,%edi
  call   <islower@plt>
  test   %rax,%rax
  je     L215
  mov    %r14d,%edi
  call   <toupper@plt>
  mov    %eax,%r15d
  jmp    L215
  cs nopw 0x0(%rax,%rax,1)
L73:
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  jne    L178
  test   %ebp,%ebp
  je     L32
  sub    $0x1,%ebp
  mov    %r12,%rdi
  mov    $0x20,%esi
  add    $0x1,%rbp
  mov    %rbp,%rdx
  add    %rbp,%r12
  call   <memset@plt>
L32:
  movzbl (%rbx),%r15d
  movl   $0x1,0xc(%rsp)
  mov    $0x3,%ebp
  add    $0x1,%rbx
  test   %r15b,%r15b
  jne    L4
  nopl   0x0(%rax,%rax,1)
L134:
  cmp    $0x8,%ebp
  je     L91
  mov    0xc(%rsp),%edx
  lea    -0x1(%rbp),%eax
  test   %edx,%edx
  jne    L8
  test   %ebp,%ebp
  je     L71
  lea    0x1(%rax),%rbx
  mov    %r12,%rdi
  mov    $0x20,%esi
  mov    %rbx,%rdx
  add    %rbx,%r12
  call   <memset@plt>
L71:
  mov    $0x2,%eax
L122:
  lea    0x1(%rax),%rdx
  mov    $0x20,%esi
  mov    %r12,%rdi
  call   <memset@plt>
L107:
  add    $0x18,%rsp
  mov    $0x1,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L178:
  lea    D6(%rip),%rdi
  call   <printf@plt>
  xor    %eax,%eax
L88:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L13:
  lea    D9(%rip),%rdi
  call   <printf@plt>
  add    $0x18,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L128:
  mov    (%rsp),%rcx
  movzbl (%rcx),%eax
  mov    %al,(%rsp)
  sub    $0x30,%eax
  cmp    $0x7,%al
  ja     L94
  movzbl 0x1(%rcx),%eax
  mov    %al,(%rsp)
  sub    $0x30,%eax
  cmp    $0x7,%al
  ja     L94
  movzbl 0x2(%rcx),%eax
  sub    $0x30,%eax
  cmp    $0x7,%al
  ja     L94
  lea    D20(%rip),%rdi
  call   <printf@plt>
L91:
  add    $0x18,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L8:
  test   %ebp,%ebp
  jne    L122
  jmp    L107
L94:
  lea    D37(%rip),%rdi
  call   <printf@plt>
  xor    %eax,%eax
  jmp    L88
```

tool_calls: name: parse_data
arguments: data_tag: D33
datatype: string
name: parse_data
arguments: data_tag: D6
datatype: string
name: parse_data
arguments: data_tag: D9
datatype: string
name: parse_data
arguments: data_tag: D20
datatype: string
name: parse_data
arguments: data_tag: D37
datatype: string

tool: D33: *?<>|"/

tool: D6: Duplicate dots in name.


tool: D9: Invalid character in name. Use \ooo for special characters.


tool: D20: Expected three octal digits.


tool: D37: Invalid octal character.


assistant: ```c
int file_cvt(unsigned char *name, unsigned char *fixed) {
  unsigned char c;
  int size, ext, cnt;
  size = 8;
  ext = 0;
  while (*name) {
    c = *name;
    if (c < ' ' || c > 0x7e || strchr("*?<>|\"/", c)) {
      printf("Invalid character in name. Use \\ooo for special "
             "characters.\n");
      return 0;
    }
    if (c == '.') {
      if (ext) {
        printf("Duplicate dots in name.\n");
        return 0;
      }
      while (size--)
        *fixed++ = ' ';
      size = 3;
      ext = 1;
      name++;
      continue;
    }
    if (c == '\\') {
      c = 0;
      for (cnt = 3; cnt; cnt--) {
        if (*name < '0' || *name > '7') {
          printf("Invalid octal character.\n");
          return 0;
        }
        c = c * 8 + *name++ - '0';
      }
      if (cnt < 4) {
        printf("Expected three octal digits.\n");
        return 0;
      }
      name += 3;
    }
    if (islower(c))
      c = toupper(c);
    if (size) {
      *fixed++ = c;
      size--;
    }
    name++;
  }
  if (*name || size == 8)
    return 0;
  if (!ext) {
    while (size--)
      *fixed++ = ' ';
    size = 3;
  }
  while (size--)
    *fixed++ = ' ';
  return 1;
}
```