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

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %edi,-0x14(%rbp)
  mov    %rsi,-0x20(%rbp)
  cmpl   $0x1,-0x14(%rbp)
  jg     L4
  lea    D11(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    D23(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    D26(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  lea    D61(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  mov    $0x0,%edi
  call   <exit@plt>
L4:
  movl   $0x1,-0x4(%rbp)
  jmp    L21
L7:
  mov    -0x4(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  lea    D27(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strstr@plt>
  test   %rax,%rax
  je     L20
  mov    -0x4(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  mov    %rax,%rsi
  lea    D13(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    -0x4(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  mov    %rax,%rdi
  call   <cube2xsf_bin@plt>
  jmp    L5
L20:
  mov    -0x4(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  lea    D14(%rip),%rdx
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strstr@plt>
  test   %rax,%rax
  je     L5
  mov    -0x4(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  mov    %rax,%rsi
  lea    D13(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    -0x4(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  mov    %rax,%rdi
  call   <cube2xsf@plt>
L5:
  addl   $0x1,-0x4(%rbp)
L21:
  mov    -0x4(%rbp),%eax
  cmp    -0x14(%rbp),%eax
  jl     L7
  mov    $0x0,%eax
  leave
  ret
```

tool_calls: name: retrieve_data
arguments: tag: D11
type_guessed: string
name: retrieve_data
arguments: tag: D23
type_guessed: string
name: retrieve_data
arguments: tag: D26
type_guessed: string
name: retrieve_data
arguments: tag: D61
type_guessed: string
name: retrieve_data
arguments: tag: D27
type_guessed: string
name: retrieve_data
arguments: tag: D13
type_guessed: string
name: retrieve_data
arguments: tag: D14
type_guessed: string

tool: D11: 
Usage : 

tool: D23: $ cube2xsf {prefix1}.cube {prefix2}.cube {prefix3}.cube ... 

tool: D26: $ cube2xsf {prefix1}.cube.bin {prefix2}.cube.bin, {prefix3}.cube.bin ... 


tool: D61: Then {prefix1}.xsf, {prefix2}.xsf, {prefix3}.xsf ... are generated. 


tool: D27: .cube.bin

tool: D13: converting %s


tool: D14: .cube

assistant: ```c
int main(int argc, char *argv[]) {
  int i;
  if (argc < 2) {
    printf("\nUsage : \n");
    printf("$ cube2xsf {prefix1}.cube {prefix2}.cube {prefix3}.cube ... \n");
    printf("$ cube2xsf {prefix1}.cube.bin {prefix2}.cube.bin, {prefix3}.cube.bin ... \n\n");
    printf("Then {prefix1}.xsf, {prefix2}.xsf, {prefix3}.xsf ... are generated. \n\n");
    exit(0);
  }
  for (i = 1; i < argc; i++) {
    if (strstr(argv[i], ".cube.bin") != NULL) {
      printf("converting %s\n", argv[i]);
      cube2xsf_bin(argv[i]);
    } else if (strstr(argv[i], ".cube") != NULL) {
      printf("converting %s\n", argv[i]);
      cube2xsf(argv[i]);
    }
  }
}
```