user: What is the c source code of the assembly code below?

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x828,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x818(%rsp)
  xor    %eax,%eax
  lea    D28(%rip),%rsi
  lea    D57(%rip),%rdi
  call   <fopen@plt>
  mov    %rax,%r12
  mov    $0x0,%ebx
  movl   $0xffffffff,0xc(%rsp)
  lea    0x10(%rsp),%rbp
  lea    0x810(%rsp),%r13
  lea    D24(%rip),%r15
  lea    D8(%rip),%r14
  test   %rax,%rax
  jne    L3
  lea    D33(%rip),%rdi
  call   <puts@plt>
  mov    $0x1,%eax
  jmp    L57
L58:
  cmpl   $0xd8,0x14(%rsp)
  jne    L34
  cmpl   $0xff,0x18(%rsp)
  jne    L34
  mov    0x1c(%rsp),%eax
  sub    $0xe0,%eax
  cmp    $0x1,%eax
  ja     L34
  test   %rbx,%rbx
  je     L15
  mov    %rbx,%rdi
  call   <fclose@plt>
L15:
  addl   $0x1,0xc(%rsp)
  mov    0xc(%rsp),%eax
  mov    %eax,%edx
  mov    %r15,%rsi
  mov    %r13,%rdi
  call   <sprintf@plt>
  mov    %r14,%rsi
  mov    %r13,%rdi
  call   <fopen@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L22
L109:
  mov    %rbx,%rcx
  mov    $0x1,%edx
  mov    $0x800,%esi
  mov    %rbp,%rdi
  call   <fwrite@plt>
L3:
  mov    %r12,%rcx
  mov    $0x1,%edx
  mov    $0x800,%esi
  mov    %rbp,%rdi
  call   <fread@plt>
  test   %rax,%rax
  je     L97
  cmpl   $0xff,0x10(%rsp)
  je     L58
L34:
  test   %rbx,%rbx
  jne    L109
  jmp    L3
L22:
  lea    0x810(%rsp),%rsi
  lea    D7(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
L97:
  mov    %rbx,%rdi
  call   <fclose@plt>
  mov    %r12,%rdi
  call   <fclose@plt>
  mov    $0x0,%eax
L57:
  mov    0x818(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L114
  add    $0x828,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L114:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: data_label: D28
data_type: string
name: retrieve_data
arguments: data_label: D57
data_type: string
name: retrieve_data
arguments: data_label: D24
data_type: string
name: retrieve_data
arguments: data_label: D8
data_type: string
name: retrieve_data
arguments: data_label: D33
data_type: string
name: retrieve_data
arguments: data_label: D7
data_type: string

tool: D28: r

tool: D57: card.raw

tool: D24: %03d.jpg

tool: D8: w

tool: D33: Could not open file!

tool: D7: Couldn't open output file %s!


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;
}
```