user: 请从给定的汇编指令推导出C源代码：

```asm
<get_format>:
  endbr64
  push   %r13
  push   %r12
  mov    %rdi,%r12
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  sub    $0x8,%rsp
  call   <get_flags@plt>
  mov    %rax,%r13
  cmp    $0xffffffff,%eax
  je     L68
L28:
  movslq %r13d,%rsi
  mov    %r12,%rdi
  add    %rbp,%rsi
  call   <get_width@plt>
  mov    %eax,%ebx
  cmp    $0xffffffff,%eax
  je     L45
L38:
  add    %r13d,%ebx
  mov    %r12,%rdi
  movslq %ebx,%rsi
  add    %rbp,%rsi
  call   <get_precision@plt>
  mov    %eax,%r13d
  cmp    $0xffffffff,%eax
  je     L57
L54:
  add    %r13d,%ebx
  mov    %r12,%rdi
  movslq %ebx,%rax
  lea    0x0(%rbp,%rax,1),%rsi
  call   <get_length_and_specifier@plt>
  mov    %eax,%ebp
  cmp    $0xffffffff,%eax
  je     L27
  add    $0x8,%rsp
  lea    (%rbx,%rbp,1),%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax,%rax,1)
L68:
  lea    D9(%rip),%rdx
  lea    D71(%rip),%rsi
  lea    D108(%rip),%rdi
  call   <_os_assert@plt>
  jmp    L28
  nopl   0x0(%rax)
L27:
  lea    D95(%rip),%rdx
  lea    D71(%rip),%rsi
  lea    D17(%rip),%rdi
  call   <_os_assert@plt>
  add    $0x8,%rsp
  lea    (%rbx,%rbp,1),%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax,%rax,1)
L57:
  lea    D12(%rip),%rdx
  lea    D71(%rip),%rsi
  lea    D17(%rip),%rdi
  call   <_os_assert@plt>
  jmp    L54
  nop
L45:
  lea    D84(%rip),%rdx
  lea    D71(%rip),%rsi
  lea    D17(%rip),%rdi
  call   <_os_assert@plt>
  jmp    L38
```

tool_calls: name: unpack_data
arguments: tag: D9
data_type: string
name: unpack_data
arguments: tag: D71
data_type: string
name: unpack_data
arguments: tag: D108
data_type: string
name: unpack_data
arguments: tag: D95
data_type: string
name: unpack_data
arguments: tag: D17
data_type: string
name: unpack_data
arguments: tag: D12
data_type: string
name: unpack_data
arguments: tag: D84
data_type: string

tool: D9: 342

tool: D71: /scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/RichardHScott/os_c/refs/heads/master/src/terminal.c

tool: D108: i != -1

tool: D95: 353

tool: D17: ret != -1

tool: D12: 349

tool: D84: 345

assistant: ```c
int get_format(struct printf_format *format, const char *str) {
  int i = 0;
  i += get_flags(format, &str[i]);
  (void)((i != -1) || _os_assert("i != -1", "/scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/RichardHScott/os_c/refs/heads/master/src/terminal.c", "342"));
  int ret = get_width(format, &str[i]);
  (void)((ret != -1) || _os_assert("ret != -1", "/scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/RichardHScott/os_c/refs/heads/master/src/terminal.c", "345"));
  i += ret;
  ret = get_precision(format, &str[i]);
  (void)((ret != -1) || _os_assert("ret != -1", "/scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/RichardHScott/os_c/refs/heads/master/src/terminal.c", "349"));
  i += ret;
  ret = get_length_and_specifier(format, &str[i]);
  (void)((ret != -1) || _os_assert("ret != -1", "/scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/RichardHScott/os_c/refs/heads/master/src/terminal.c", "353"));
  i += ret;
  return i;
}
```