user: What would the C source look like for the assembly code provided here:

```asm
<bcirc_printf>:
  endbr64
  push   %r14
  mov    %rdi,%r14
  push   %r13
  push   %r12
  push   %rbp
  xor    %ebp,%ebp
  push   %rbx
  sub    $0x30,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x28(%rsp)
  xor    %eax,%eax
  call   <strlen@plt>
  mov    %ebp,%edi
  lea    0x1(%rax),%r12d
  movslq %r12d,%r12
  mov    %r12,%rsi
  call   <va_start@plt>
  mov    %ebp,%ecx
  mov    %r14,%rdx
  xor    %esi,%esi
  xor    %edi,%edi
  call   <vsnprintf@plt>
  mov    %ebp,%edi
  mov    %rax,%rbx
  call   <va_end@plt>
  lea    0x1(%rbx),%edi
  call   <malloc@plt>
  mov    %r12,%rsi
  mov    %ebp,%edi
  lea    0x10(%rsp),%r12
  mov    %rax,%r13
  call   <va_start@plt>
  lea    0x1(%rbx),%rsi
  mov    %ebp,%ecx
  mov    %r14,%rdx
  mov    %r13,%rdi
  call   <vsnprintf@plt>
  mov    %ebp,%edi
  lea    0xc(%rsp),%rbp
  call   <va_end@plt>
  mov    %rbp,%rdi
  call   <time@plt>
  mov    %rbp,%rdi
  call   <localtime@plt>
  lea    D28(%rip),%rdx
  mov    $0x14,%esi
  mov    %r12,%rdi
  mov    %rax,%rcx
  call   <strftime@plt>
  mov    %r13,%rdi
  call   <strlen@plt>
  mov    %r12,%rdi
  mov    %eax,%ebx
  call   <strlen@plt>
  lea    0x4(%rbx,%rax,1),%edi
  call   <malloc@plt>
  mov    %r13,%rcx
  mov    %r12,%rdx
  lea    D7(%rip),%rsi
  mov    %rax,%rbp
  mov    %rax,%rdi
  call   <sprintf@plt>
  mov    $0xffffffff,%eax
  test   %rbp,%rbp
  je     L4
  mov    %r13,%rdi
  call   <free@plt>
  mov    %rbp,%rdi
  call   <strlen@plt>
  lea    0x1(%rax),%edi
  call   <malloc@plt>
  mov    %rbp,%rsi
  mov    %rax,%r12
  mov    %rax,%rdi
  call   <strcpy@plt>
  xor    %esi,%esi
  mov    %r12,%rdi
  call   <bcirc_log@plt>
  mov    %r12,%rsi
  lea    D22(%rip),%rdi
  call   <printf@plt>
  mov    %r12,%rdi
  call   <free@plt>
  mov    $0x1,%eax
L4:
  mov    0x28(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L14
  add    $0x30,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
L14:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: data_label: D28
datatype: string
name: read_data
arguments: data_label: D7
datatype: string
name: read_data
arguments: data_label: D22
datatype: string

tool: D28: %H:%M:%S

tool: D7: %s | %s

tool: D22: %s

assistant: ```c
int bcirc_printf(char *str, ...) {
  char *output = NULL;
  size_t len = 0;
  size_t size = (strlen(str) + 1) * sizeof(char);
  va_list args;
  va_start(args, size);
  len = vsnprintf(0, 0, str, args);
  va_end(args);
  output = malloc(len + 1);
  va_start(args, size);
  vsnprintf(output, len + 1, str, args);
  va_end(args);
  time_t rawtime;
  struct tm *timeinfo;
  time(&rawtime);
  timeinfo = localtime(&rawtime);
  const int max_time_len = 20;
  char time_prefix[max_time_len];
  strftime(time_prefix, max_time_len, "%H:%M:%S", timeinfo);
  char *new_output = malloc(strlen(output) + 3 + strlen(time_prefix) + 1);
  sprintf(new_output, "%s | %s", time_prefix, output);
  if (!new_output) {
    return -1;
  }
  free(output);
  output = malloc((strlen(new_output) + 1) * (sizeof(char)));
  strcpy(output, new_output);
  bcirc_log(output, NULL);
  printf("%s", output);
  free(output);
  return 1;
}
```