user: 请从给定的汇编指令推导出C源代码：

```asm
<main>:
  endbr64
  push   %r15
  lea    D59(%rip),%rsi
  lea    D28(%rip),%rdi
  push   %r14
  lea    D15(%rip),%r15
  push   %r13
  mov    $0xffffffff,%r13d
  push   %r12
  push   %rbp
  xor    %ebp,%ebp
  push   %rbx
  sub    $0x818,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x808(%rsp)
  xor    %eax,%eax
  mov    %rsp,%rbx
  lea    0x800(%rsp),%r14
  call   <fopen@plt>
  mov    %rax,%r12
  test   %rax,%rax
  je     L81
  nopl   0x0(%rax)
L42:
  mov    %r12,%rcx
  mov    $0x1,%edx
  mov    $0x800,%esi
  mov    %rbx,%rdi
  call   <fread@plt>
  test   %rax,%rax
  je     L103
  cmpl   $0xff,(%rsp)
  je     L35
L60:
  test   %rbp,%rbp
  je     L42
L116:
  mov    %rbp,%rcx
  mov    $0x1,%edx
  mov    $0x800,%esi
  mov    %rbx,%rdi
  call   <fwrite@plt>
  jmp    L42
  nopl   0x0(%rax,%rax,1)
L35:
  cmpl   $0xd8,0x4(%rsp)
  jne    L60
  cmpl   $0xff,0x8(%rsp)
  jne    L60
  mov    0xc(%rsp),%eax
  sub    $0xe0,%eax
  cmp    $0x1,%eax
  ja     L60
  test   %rbp,%rbp
  je     L65
  mov    %rbp,%rdi
  call   <fclose@plt>
L65:
  add    $0x1,%r13d
  mov    %r15,%rsi
  mov    %r14,%rdi
  mov    %r13d,%edx
  call   <sprintf@plt>
  lea    D46(%rip),%rsi
  mov    %r14,%rdi
  call   <fopen@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  jne    L116
  mov    %r14,%rsi
  lea    D35(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  nopl   0x0(%rax)
L103:
  mov    %rbp,%rdi
  call   <fclose@plt>
  mov    %r12,%rdi
  call   <fclose@plt>
  xor    %eax,%eax
L70:
  mov    0x808(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L119
  add    $0x818,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L81:
  lea    D30(%rip),%rdi
  call   <puts@plt>
  mov    $0x1,%eax
  jmp    L70
L119:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: disassemble_data
arguments: data_label: D59
type_infered: string
name: disassemble_data
arguments: data_label: D28
type_infered: string
name: disassemble_data
arguments: data_label: D15
type_infered: string
name: disassemble_data
arguments: data_label: D46
type_infered: string
name: disassemble_data
arguments: data_label: D35
type_infered: string
name: disassemble_data
arguments: data_label: D30
type_infered: string

tool: D59: r

tool: D28: card.raw

tool: D15: %03d.jpg

tool: D46: w

tool: D35: Couldn't open output file %s!


tool: D30: Could not open file!

assistant: ```c
int main(int argc, char *argv[]) {
  int filenum = -1;
  char filename[8];
  FILE *output = NULL;
  FILE *input = fopen("card.raw", "r");
  if (input == NULL) {
    printf("Could not open file!\n");
    return 1;
  }
  uint8_t buffer[512];
  while ((fread(&buffer, sizeof(buffer), 1, input)) != 0) {
    if ((buffer[0] == 0xFF) && (buffer[1] == 0xD8) && (buffer[2] == 0xFF) && ((buffer[3] == 0xE0) || (buffer[3] == 0xE1))) {
      if (output != NULL) {
        fclose(output);
      }
      filenum++;
      sprintf(filename, "%03d.jpg", filenum);
      output = fopen(filename, "w");
      if (output == NULL) {
        printf("Couldn't open output file %s!\n", filename);
        break;
      }
    }
    if (output != NULL) {
      fwrite(&buffer, sizeof(buffer), 1, output);
    }
  }
  fclose(output);
  fclose(input);
  return 0;
}
```