user: Demonstrate the C code that generates the assembly output below:

```asm
<main>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  cmp    $0x2,%edi
  jle    L84
  mov    0x8(%rsi),%rdi
  mov    %rsi,%rbx
  lea    D23(%rip),%rsi
  call   <fopen@plt>
  mov    0x10(%rbx),%rdi
  lea    D67(%rip),%rsi
  mov    %rax,%rbp
  call   <fopen@plt>
  mov    %rax,%r12
  test   %rbp,%rbp
  je     L32
  test   %rax,%rax
  je     L91
  lea    D55(%rip),%r13
  lea    0x4(%rsp),%rdx
  mov    %rbp,%rdi
  mov    %r13,%rsi
  lea    0xc(%rsp),%rbx
  call   <fscanf@plt>
  lea    0x8(%rsp),%rdx
  mov    %r13,%rsi
  mov    %rbp,%rdi
  call   <fscanf@plt>
  mov    0x8(%rsp),%edx
  mov    0x4(%rsp),%esi
  lea    D5(%rip),%rdi
  call   <printf@plt>
  mov    0x8(%rsp),%ecx
  mov    0x4(%rsp),%edx
  mov    %r12,%rdi
  lea    D66(%rip),%rsi
  call   <fprintf@plt>
  jmp    L109
  nopl   0x0(%rax,%rax,1)
L123:
  cmp    $0x2e,%al
  je     L112
L39:
  mov    %rbp,%rdi
  call   <feof@plt>
  test   %eax,%eax
  jne    L134
L109:
  mov    %rbp,%rdx
  mov    $0xc,%esi
  mov    %rbx,%rdi
  call   <fgets@plt>
  test   %rax,%rax
  je     L39
  movzbl 0xc(%rsp),%eax
  cmp    $0x2a,%al
  sete   %dl
  cmp    $0x20,%al
  je     L40
  test   %dl,%dl
  je     L123
L40:
  movzbl %dl,%edx
  shl    $0x7,%edx
L143:
  xor    %edi,%edi
  cmpb   $0x2a,0xe(%rsp)
  mov    %r12,%rsi
  sete   %dil
  xor    %eax,%eax
  shl    $0x5,%edi
  cmpb   $0x2a,0xd(%rsp)
  sete   %al
  shl    $0x6,%eax
  or     %eax,%edi
  xor    %eax,%eax
  cmpb   $0x2a,0x13(%rsp)
  sete   %al
  or     %eax,%edi
  xor    %eax,%eax
  cmpb   $0x2a,0xf(%rsp)
  sete   %al
  shl    $0x4,%eax
  or     %eax,%edi
  xor    %eax,%eax
  cmpb   $0x2a,0x10(%rsp)
  sete   %al
  shl    $0x3,%eax
  or     %eax,%edi
  xor    %eax,%eax
  cmpb   $0x2a,0x11(%rsp)
  sete   %al
  shl    $0x2,%eax
  or     %eax,%edi
  xor    %eax,%eax
  cmpb   $0x2a,0x12(%rsp)
  sete   %al
  add    %eax,%eax
  or     %eax,%edi
  or     %edx,%edi
  call   <fputc@plt>
  mov    %rbp,%rdi
  call   <feof@plt>
  test   %eax,%eax
  je     L109
L134:
  mov    %rbp,%rdi
  call   <fclose@plt>
  mov    %r12,%rdi
  call   <fclose@plt>
  xor    %eax,%eax
L141:
  mov    0x18(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L37
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L112:
  xor    %edx,%edx
  jmp    L143
L84:
  lea    D48(%rip),%rdi
  call   <puts@plt>
  mov    $0x1,%eax
  jmp    L141
L91:
  lea    D45(%rip),%rdi
  call   <puts@plt>
  mov    $0x3,%eax
  jmp    L141
L32:
  lea    D17(%rip),%rdi
  call   <puts@plt>
  mov    $0x2,%eax
  jmp    L141
L37:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: parse_data
arguments: tag: D23
type: string
name: parse_data
arguments: tag: D67
type: string
name: parse_data
arguments: tag: D55
type: string
name: parse_data
arguments: tag: D5
type: string
name: parse_data
arguments: tag: D66
type: string
name: parse_data
arguments: tag: D48
type: string
name: parse_data
arguments: tag: D45
type: string
name: parse_data
arguments: tag: D17
type: string

tool: D23: r

tool: D67: wb

tool: D55: %d

tool: D5: font size: %dx%d


tool: D66: %d
%d


tool: D48: usage> makefont source.txt font.bin

tool: D45: can't open output file.

tool: D17: can't open input file.

assistant: ```c
int main(int argc, char **argv) {
  FILE *fp0, *fp1;
  if (argc < 3) {
    puts("usage> makefont source.txt font.bin");
    return 1;
  }
  fp0 = fopen(argv[1], "r");
  fp1 = fopen(argv[2], "wb");
  if (fp0 == NULL) {
    puts("can't open input file.");
    return 2;
  }
  if (fp1 == NULL) {
    puts("can't open output file.");
    return 3;
  }
  unsigned int xsize, ysize;
  fscanf(fp0, "%d", &xsize);
  fscanf(fp0, "%d", &ysize);
  printf("font size: %dx%d\n", xsize, ysize);
  fprintf(fp1, "%d\n%d\n", xsize, ysize);
  do {
    char s[12];
    int i;
    if (fgets(s, 12, fp0) != NULL && (s[0] == ' ' || s[0] == '*' || s[0] == '.')) {
      i = (s[0] == '*') << 7;
      i |= (s[1] == '*') << 6;
      i |= (s[2] == '*') << 5;
      i |= (s[3] == '*') << 4;
      i |= (s[4] == '*') << 3;
      i |= (s[5] == '*') << 2;
      i |= (s[6] == '*') << 1;
      i |= (s[7] == '*');
      fputc(i, fp1);
    }
  } while (!feof(fp0));
  fclose(fp0);
  fclose(fp1);
  return 0;
}
```