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

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x60,%rsp
  mov    %edi,-0x54(%rbp)
  mov    %rsi,-0x60(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  cmpl   $0x1,-0x54(%rbp)
  jle    L138
  lea    D69(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0x1,%eax
  jmp    L131
L138:
  lea    D63(%rip),%rax
  mov    %rax,%rsi
  lea    D48(%rip),%rax
  mov    %rax,%rdi
  call   <fopen@plt>
  mov    %rax,-0x38(%rbp)
  movq   $0x0,-0x40(%rbp)
  cmpq   $0x0,-0x38(%rbp)
  jne    L80
  lea    D16(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0x1,%eax
  jmp    L131
L80:
  movq   $0x3b6,-0x30(%rbp)
  movq   $0x3b7,-0x28(%rbp)
  movl   $0x0,-0x48(%rbp)
  movl   $0x0,-0x44(%rbp)
L93:
  mov    $0x200,%edi
  call   <malloc@plt>
  mov    %rax,-0x20(%rbp)
  mov    -0x38(%rbp),%rdx
  mov    -0x20(%rbp),%rax
  mov    %rdx,%rcx
  mov    $0x1,%edx
  mov    $0x200,%esi
  mov    %rax,%rdi
  call   <fread@plt>
  cmp    $0x1,%eax
  je     L38
  mov    -0x40(%rbp),%rax
  mov    %rax,%rdi
  call   <fclose@plt>
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  nop
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <fclose@plt>
  mov    $0x0,%eax
  jmp    L131
L38:
  mov    -0x20(%rbp),%rax
  mov    (%rax),%rdx
  mov    -0x20(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%rax
  add    %rax,%rdx
  mov    -0x20(%rbp),%rax
  add    $0x10,%rax
  mov    (%rax),%rax
  add    %rax,%rdx
  mov    -0x20(%rbp),%rax
  add    $0x18,%rax
  mov    (%rax),%rax
  add    %rdx,%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  cmp    -0x30(%rbp),%rax
  je     L97
  mov    -0x18(%rbp),%rax
  cmp    -0x28(%rbp),%rax
  jne    L59
L97:
  movl   $0x1,-0x48(%rbp)
  cmpq   $0x0,-0x40(%rbp)
  je     L44
  mov    -0x40(%rbp),%rax
  mov    %rax,%rdi
  call   <fclose@plt>
L44:
  mov    -0x44(%rbp),%edx
  lea    -0x10(%rbp),%rax
  lea    D46(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <sprintf@plt>
  lea    -0x10(%rbp),%rax
  lea    D62(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <fopen@plt>
  mov    %rax,-0x40(%rbp)
  cmpq   $0x0,-0x40(%rbp)
  jne    L76
  lea    -0x10(%rbp),%rax
  mov    %rax,%rsi
  lea    D17(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <fclose@plt>
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    $0x1,%eax
  jmp    L131
L76:
  addl   $0x1,-0x44(%rbp)
L59:
  cmpl   $0x0,-0x48(%rbp)
  je     L32
  mov    -0x40(%rbp),%rdx
  mov    -0x20(%rbp),%rax
  mov    %rdx,%rcx
  mov    $0x1,%edx
  mov    $0x200,%esi
  mov    %rax,%rdi
  call   <fwrite@plt>
L32:
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  jmp    L93
L131:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L48
  call   <__stack_chk_fail@plt>
L48:
  leave
  ret
```

tool_calls: name: read_data
arguments: label: D69
type: string
name: read_data
arguments: label: D63
type: string
name: read_data
arguments: label: D48
type: string
name: read_data
arguments: label: D16
type: string
name: read_data
arguments: label: D46
type: string
name: read_data
arguments: label: D62
type: string
name: read_data
arguments: label: D17
type: string

tool: D69: Usage: no command-line arguments required.

tool: D63: r

tool: D48: card.raw

tool: D16: Could not open card.raw for reading.

tool: D46: %03d.jpg

tool: D62: w

tool: D17: Could not open %s for writing.


assistant: ```c
int main(int argc, char *argv[]) {
  if (argc > 1) {
    printf("Usage: no command-line arguments required.");
    return 1;
  }
  FILE *inptr = fopen("card.raw", "r");
  FILE *outptr = NULL;
  if (inptr == NULL) {
    printf("Could not open card.raw for reading.\n");
    return 1;
  }
  uint16_t signatureA = 0xff + 0xd8 + 0xff + 0xe0;
  uint16_t signatureB = 0xff + 0xd8 + 0xff + 0xe1;
  bool foundFirstSignature = false;
  int fnumber = 0;
  while (true) {
    uint8_t *buffer = (uint8_t *)malloc(512);
    if (fread(buffer, 512, 1, inptr) != 1) {
      fclose(outptr);
      free(buffer);
      break;
    }
    uint16_t signature = buffer[0] + buffer[1] + buffer[2] + buffer[3];
    if (signature == signatureA || signature == signatureB) {
      foundFirstSignature = true;
      if (outptr != NULL) {
        fclose(outptr);
      }
      char fname[8];
      sprintf(fname, "%03d.jpg", fnumber);
      outptr = fopen(fname, "w");
      if (outptr == NULL) {
        printf("Could not open %s for writing.\n", fname);
        fclose(inptr);
        free(buffer);
        return 1;
      }
      fnumber += 1;
    }
    if (foundFirstSignature) {
      fwrite(buffer, 512, 1, outptr);
    }
    free(buffer);
  }
  fclose(inptr);
  return 0;
}
```