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

```asm
<main>:
  endbr64
  push   %r15
  lea    D12(%rip),%rsi
  lea    D13(%rip),%rdi
  xor    %r15d,%r15d
  push   %r14
  xor    %r14d,%r14d
  push   %r13
  mov    $0x1,%r13d
  push   %r12
  lea    D7(%rip),%r12
  push   %rbp
  push   %rbx
  sub    $0x68,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x58(%rsp)
  xor    %eax,%eax
  movl   $0x0,0x1c(%rsp)
  lea    0x20(%rsp),%rbp
  call   <fopen@plt>
  movl   $0x0,0xc(%rsp)
  mov    %rax,%rbx
L135:
  mov    %rbx,%rdi
  call   <feof@plt>
  test   %eax,%eax
  jne    L54
L69:
  mov    %rbx,%rdx
  mov    $0x14,%esi
  mov    %rbp,%rdi
  call   <fgets@plt>
  mov    %rbp,%rsi
  mov    %r12,%rdi
  xor    %eax,%eax
  call   <printf@plt>
  movzbl 0x20(%rsp),%eax
  cmp    $0x4d,%al
  je     L67
  cmp    $0x54,%al
  jne    L135
  movzbl 0x25(%rsp),%eax
  cmp    $0x72,%al
  je     L121
  cmp    $0x6c,%al
  jne    L135
  test   %r13d,%r13d
  je     L84
  neg    %r13d
  mov    %r13d,0xc(%rsp)
  xor    %r13d,%r13d
  jmp    L135
  nopl   0x0(%rax)
L67:
  lea    0x40(%rsp),%rdx
  mov    %rbp,%rdi
  lea    0x1c(%rsp),%rcx
  lea    D36(%rip),%rsi
  call   <sscanf@plt>
  mov    0x1c(%rsp),%eax
  mov    0xc(%rsp),%edx
  mov    %rbx,%rdi
  imul   %eax,%edx
  imul   %r13d,%eax
  add    %edx,%r14d
  add    %eax,%r15d
  call   <feof@plt>
  test   %eax,%eax
  je     L69
  cs nopw 0x0(%rax,%rax,1)
L54:
  xor    %eax,%eax
  mov    %r15d,%edx
  lea    D28(%rip),%rdi
  mov    %r14d,%esi
  call   <printf@plt>
  mov    0x58(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L14
  add    $0x68,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L121:
  test   %r13d,%r13d
  je     L111
  mov    %r13d,0xc(%rsp)
  xor    %r13d,%r13d
  jmp    L135
L111:
  mov    0xc(%rsp),%eax
  test   %eax,%eax
  je     L135
  neg    %eax
  movl   $0x0,0xc(%rsp)
  mov    %eax,%r13d
  jmp    L135
L84:
  mov    0xc(%rsp),%r13d
  movl   $0x0,0xc(%rsp)
  jmp    L135
L14:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: tag: D12
data_type: string
name: read_data
arguments: tag: D13
data_type: string
name: read_data
arguments: tag: D7
data_type: string
name: read_data
arguments: tag: D36
data_type: string
name: read_data
arguments: tag: D28
data_type: string

tool: D12: r

tool: D13: coordinates_input.txt

tool: D7: %s

tool: D36: %s %d

tool: D28: %d,%d


assistant: ```c
int main() {
  char line[20];
  signed int posx = 0;
  signed int posy = 0;
  signed int xincr = 0;
  signed int yincr = 1;
  signed int txincr = 0;
  signed int tyincr = 0;
  signed int steps = 0;
  char dummy[20];
  FILE *fd = fopen("coordinates_input.txt", "r");
  while (!feof(fd)) {
    fgets(line, sizeof(line), fd);
    printf("%s", line);
    if (line[0] == 'M') {
      sscanf(line, "%s %d", dummy, &steps);
      posx += xincr * steps;
      posy += yincr * steps;
    } else if (line[0] == 'T') {
      txincr = xincr;
      tyincr = yincr;
      if (line[5] == 'r') {
        if (yincr) {
          xincr = yincr;
          yincr = 0;
        } else if (xincr) {
          yincr = 0 - xincr;
          xincr = 0;
        }
      }
      if (line[5] == 'l') {
        if (yincr) {
          xincr = 0 - yincr;
          yincr = 0;
        } else if (xincr) {
          yincr = xincr;
          xincr = 0;
        }
      }
    }
  }
  printf("%d,%d\n", posx, posy);
  return 0;
}
```