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

```asm
<convert_human_time_format>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x18,%rsp
  call   <strlen@plt>
  mov    $0x1,%esi
  lea    0x1(%rax,%rax,1),%edi
  call   <xcalloc@plt>
  movsbl (%rbx),%edi
  mov    %rax,%r15
  test   %dil,%dil
  je     L146
  mov    %rax,%rbp
  xor    %r12d,%r12d
  lea    D33(%rip),%r13
  lea    D64(%rip),%r14
  nopw   0x0(%rax,%rax,1)
L151:
  call   <isalpha@plt>
  test   %rax,%rax
  je     L33
  movsbl (%rbx),%edx
  lea    -0x48(%rdx),%eax
  cmp    $0x30,%al
  ja     L226
  movzbl %al,%eax
  movslq (%r14,%rax,4),%rax
  add    %r14,%rax
  notrack jmp *%rax
  nopl   (%rax)
L226:
  mov    $0x1,%r8d
L131:
  mov    %r8d,%edi
  mov    %r13,%rsi
  add    $0x1,%rbx
  call   <is_fatal@plt>
  movsbl (%rbx),%edi
  test   %dil,%dil
  jne    L151
L146:
  add    $0x18,%rsp
  mov    %r15,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
  xor    %r8d,%r8d
  cmp    $0x53,%r12b
  je     L131
  mov    %rbp,%rdi
  mov    %r8d,0xc(%rsp)
  add    $0x2,%rbp
  lea    D28(%rip),%rsi
  call   <strcat@plt>
  mov    $0x53,%r12d
  movsbl (%rbx),%edx
  mov    0xc(%rsp),%r8d
  jmp    L131
  nopl   0x0(%rax)
  xor    %r8d,%r8d
  cmp    $0x4d,%r12b
  je     L131
  mov    %rbp,%rdi
  mov    %r8d,0xc(%rsp)
  add    $0x2,%rbp
  lea    D67(%rip),%rsi
  call   <strcat@plt>
  mov    $0x4d,%r12d
  movsbl (%rbx),%edx
  mov    0xc(%rsp),%r8d
  jmp    L131
  nopl   0x0(%rax)
  mov    %dl,0xc(%rsp)
  cmp    $0x58,%r12b
  jne    L55
  movb   $0x70,-0x1(%rbp)
  xor    %r8d,%r8d
  movsbl (%rbx),%edx
  jmp    L131
  nopl   0x0(%rax)
  mov    %dl,0xc(%rsp)
  lea    D38(%rip),%rsi
  cmp    $0x48,%r12b
  jne    L99
  movb   $0x48,-0x1(%rbp)
  xor    %r8d,%r8d
  movsbl (%rbx),%edx
  jmp    L131
L55:
  lea    D75(%rip),%rsi
L99:
  mov    %rbp,%rdi
  add    $0x2,%rbp
  call   <strcat@plt>
  movzbl 0xc(%rsp),%r12d
  movsbl (%rbx),%edx
  xor    %r8d,%r8d
  jmp    L131
  nopl   0x0(%rax)
  cmp    $0x58,%r12b
  jne    L115
  movb   $0x50,-0x1(%rbp)
  xor    %r8d,%r8d
  movsbl (%rbx),%edx
  jmp    L131
  nopl   0x0(%rax)
  cmp    $0x48,%r12b
  jne    L121
  movb   $0x49,-0x1(%rbp)
  xor    %r8d,%r8d
  movsbl (%rbx),%edx
  jmp    L131
  nopl   (%rax)
L33:
  movsbl (%rbx),%edi
  call   <ispunct@plt>
  test   %rax,%rax
  je     L18
L170:
  movsbl (%rbx),%edx
  add    $0x1,%rbp
  xor    %r8d,%r8d
  xor    %r12d,%r12d
  mov    %dl,-0x1(%rbp)
  jmp    L131
  nopw   0x0(%rax,%rax,1)
L18:
  movsbl (%rbx),%edi
  call   <isspace@plt>
  test   %rax,%rax
  jne    L170
  movsbl (%rbx),%edx
  mov    $0x1,%r8d
  jmp    L131
  nopl   0x0(%rax,%rax,1)
L121:
  mov    %rbp,%rdi
  lea    D4(%rip),%rsi
  add    $0x2,%rbp
  mov    $0x48,%r12d
  call   <strcat@plt>
  movsbl (%rbx),%edx
  xor    %r8d,%r8d
  jmp    L131
  nopl   0x0(%rax)
L115:
  mov    %rbp,%rdi
  lea    D25(%rip),%rsi
  add    $0x2,%rbp
  mov    $0x58,%r12d
  call   <strcat@plt>
  movsbl (%rbx),%edx
  xor    %r8d,%r8d
  jmp    L131
```

tool_calls: name: parse_data
arguments: label: D33
type_infered: string
name: parse_data
arguments: label: D28
type_infered: string
name: parse_data
arguments: label: D67
type_infered: string
name: parse_data
arguments: label: D38
type_infered: string
name: parse_data
arguments: label: D75
type_infered: string
name: parse_data
arguments: label: D4
type_infered: string
name: parse_data
arguments: label: D25
type_infered: string

tool: D33: Invalid character "%c" in time format!

tool: D28: %S

tool: D67: %M

tool: D38: %k

tool: D75: %p

tool: D4: %l

tool: D25: %P

assistant: ```c
char *convert_human_time_format(const char *human_timef) {
  char *result, *cin, *cout;
  char prev;
  result = (char *)xcalloc((2 * strlen(human_timef)) + 1, 1);
  cout = result;
  prev = '\0';
  for (cin = (char *)human_timef; *cin; cin++) {
    int okay = 1;
    if (isalpha(*cin)) {
      switch (*cin) {
      case 'S':
      case 's':
        if (prev != 'S') {
          strcat(cout, "%S");
          cout += 2;
          prev = 'S';
        }
        break;
      case 'M':
      case 'm':
        if (prev != 'M') {
          strcat(cout, "%M");
          cout += 2;
          prev = 'M';
        }
        break;
      case 'h':
        if (prev != 'H') {
          strcat(cout, "%l");
          cout += 2;
          prev = 'H';
        } else
          *(cout - 1) = 'I';
        break;
      case 'H':
        if (prev != 'H') {
          strcat(cout, "%k");
          cout += 2;
          prev = 'H';
        } else
          *(cout - 1) = 'H';
        break;
      case 'x':
        if (prev != 'X') {
          strcat(cout, "%P");
          cout += 2;
          prev = 'X';
        } else
          *(cout - 1) = 'P';
        break;
      case 'X':
        if (prev != 'X') {
          strcat(cout, "%p");
          cout += 2;
          prev = 'X';
        } else
          *(cout - 1) = 'p';
        break;
      default:
        okay = 0;
      }
    } else if (ispunct(*cin) || isspace(*cin)) {
      *cout++ = *cin;
      prev = '\0';
    } else
      okay = 0;
    is_fatal(okay == 0, "Invalid character \"%c\" in time format!", *cin);
  }
  return result;
}
```