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

```asm
<my_str2vect>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  test   %rdi,%rdi
  je     L224
  movzbl (%rdi),%eax
  mov    %rdi,%rbx
  xor    %ecx,%ecx
  test   %al,%al
  je     L203
  nopw   0x0(%rax,%rax,1)
L89:
  cmp    $0x20,%al
  je     L31
  cmp    $0x9,%al
  jne    L101
L31:
  add    $0x1,%ecx
  movslq %ecx,%rdx
  nopw   0x0(%rax,%rax,1)
L29:
  movzbl (%rbx,%rdx,1),%eax
  mov    %edx,%ecx
  add    $0x1,%rdx
  cmp    $0x20,%al
  je     L29
  cmp    $0x9,%al
  je     L29
  test   %al,%al
  jne    L101
L203:
  lea    0x1(,%rsi,8),%edi
  xor    %r14d,%r14d
  xor    %r12d,%r12d
  call   <xmalloc@plt>
  mov    %rax,%r13
L144:
  movslq %r12d,%rbp
  movslq %r14d,%rdi
  movzbl (%rbx,%rbp,1),%edx
  test   %dl,%dl
  je     L3
  cmp    $0x9,%dl
  je     L41
  cmp    $0x20,%dl
  jne    L138
L41:
  lea    0x1(%rbx,%rbp,1),%rax
  lea    0x1(%r12),%ecx
  sub    %eax,%ecx
  nop
L220:
  movzbl (%rax),%edx
  lea    (%rcx,%rax,1),%esi
  mov    %rax,%rbp
  lea    0x1(%rax),%rax
  cmp    $0x20,%dl
  je     L220
  cmp    $0x9,%dl
  je     L220
  test   %dl,%dl
  jne    L262
L3:
  movq   $0x0,0x0(%r13,%rdi,8)
L183:
  add    $0x18,%rsp
  mov    %r13,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
L101:
  add    $0x1,%esi
  test   $0xdf,%al
  je     L89
  cmp    $0x9,%al
  je     L89
  add    $0x1,%ecx
  movslq %ecx,%rdx
  jmp    L36
  nopl   0x0(%rax,%rax,1)
L195:
  cmp    $0x9,%al
  je     L43
L36:
  movzbl (%rbx,%rdx,1),%eax
  mov    %edx,%ecx
  add    $0x1,%rdx
  test   $0xdf,%al
  jne    L195
L43:
  test   %al,%al
  jne    L89
  jmp    L203
  nop
L138:
  add    %rbx,%rbp
L104:
  test   $0xdf,%dl
  je     L194
  cmp    $0x9,%dl
  je     L194
  lea    0x1(%r12),%eax
  xor    %r15d,%r15d
  cltq
  jmp    L206
  nopl   0x0(%rax)
L73:
  cmp    $0x9,%dl
  je     L11
L206:
  movzbl (%rbx,%rax,1),%edx
  mov    %r15d,%ecx
  mov    %eax,%r12d
  add    $0x1,%r15d
  add    $0x1,%rax
  test   $0xdf,%dl
  jne    L73
L11:
  lea    0x2(%rcx),%edi
  movslq %r15d,%rcx
L199:
  mov    %rcx,0x8(%rsp)
  call   <xmalloc@plt>
  mov    %r15d,%edx
  mov    %rbp,%rsi
  mov    %rax,0x0(%r13,%r14,8)
  mov    %rax,%rdi
  call   <my_strncpy@plt>
  mov    0x0(%r13,%r14,8),%rax
  mov    0x8(%rsp),%rcx
  add    $0x1,%r14
  movb   $0x0,(%rax,%rcx,1)
  jmp    L144
L224:
  xor    %r13d,%r13d
  jmp    L183
L194:
  xor    %ecx,%ecx
  mov    $0x1,%edi
  xor    %r15d,%r15d
  jmp    L199
L262:
  mov    %esi,%r12d
  jmp    L104
```

assistant: ```c
char **my_str2vect(char *str) {
  int vectS;
  int strLen;
  int i;
  char **vect = ((void *)0);
  char *substringStart = ((void *)0);
  i = 0;
  if (str) {
    while (str[i]) {
      for (; str[i] == ' ' || str[i] == '\t'; ++i)
        ;
      if (str[i])
        ++vectS;
      for (; str[i] != ' ' && str[i] != '\t' && str[i]; ++i)
        ;
    }
    vect = (char **)xmalloc((vectS * sizeof(char *)) + 1);
    i = 0;
    vectS = 0;
    while (str[i]) {
      for (; str[i] == ' ' || str[i] == '\t'; ++i)
        ;
      if (str[i]) {
        substringStart = &(str[i]);
        for (strLen = 0; str[i] != ' ' && str[i] != '\t' && str[i]; ++i)
          ++strLen;
        vect[vectS] = xmalloc((strLen * sizeof(char)) + 1);
        my_strncpy(vect[vectS], substringStart, strLen);
        vect[vectS][strLen] = '\0';
        ++vectS;
      }
    }
    vect[vectS] = ((void *)0);
  }
  return vect;
}
```