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

```asm
<readsplit>:
  endbr64
  push   %r14
  lea    D57(%rip),%r14
  push   %r13
  mov    %rdi,%r13
  mov    $0x100,%edi
  push   %r12
  mov    %rdx,%r12
  push   %rbp
  push   %rbx
  mov    %rsi,%rbx
  sub    $0x10,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  call   <malloc@plt>
  mov    $0x80,%edi
  mov    %rax,(%rsp)
  call   <malloc@plt>
  mov    %rax,%rbp
  jmp    L49
  nopl   (%rax)
L74:
  mov    (%rsp),%rdi
  mov    %rbp,%rcx
  mov    %r14,%rsi
  xor    %eax,%eax
  mov    %rdi,%rdx
  call   <sprintf@plt>
L49:
  mov    %rbp,%rdi
  mov    %rbx,%rdx
  mov    $0x100,%esi
  call   <fgets@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  jne    L74
  lea    D0(%rip),%rbx
  mov    (%rsp),%rdi
  mov    %rbx,%rsi
  call   <strcmp@plt>
  mov    %rax,%r8
  mov    %rbx,%rax
  test   %r8,%r8
  jne    L35
L143:
  mov    0x8(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L25
  add    $0x10,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
  nopl   0x0(%rax,%rax,1)
L35:
  mov    (%rsp),%rbx
  mov    %rbx,%rdi
  call   <strlen@plt>
  cltq
  lea    -0x1(%rbx,%rax,1),%rax
  cmpb   $0xa,(%rax)
  je     L89
  mov    (%rsp),%rax
  test   %r12,%r12
  je     L143
L48:
  lea    D36(%rip),%rsi
  mov    %r12,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L123
L56:
  mov    (%rsp),%rdx
  xor    %eax,%eax
  mov    %rsp,%rbp
  cmpb   $0x6d,0x1(%rdx)
  je     L68
L91:
  lea    0x0(%r13,%rax,8),%rbx
  jmp    L65
  nopl   0x0(%rax,%rax,1)
L64:
  mov    %rax,(%rbx)
  add    $0x8,%rbx
L65:
  mov    %r12,%rsi
  mov    %rbp,%rdi
  call   <strsep@plt>
  test   %rax,%rax
  jne    L64
  mov    (%rsp),%rdi
  call   <free@plt>
  lea    D0(%rip),%rax
  jmp    L143
  nopl   0x0(%rax)
L89:
  cmpb   $0xa,(%r12)
  je     L48
  movb   $0x0,(%rax)
  jmp    L48
  nopl   0x0(%rax)
L123:
  lea    D15(%rip),%rdi
  call   <puts@plt>
  jmp    L56
L68:
  mov    $0x4,%edi
  call   <malloc@plt>
  lea    D41(%rip),%rsi
  mov    %rax,%rbx
  mov    (%rsp),%rax
  mov    %rbx,%rdi
  movsbl 0x7(%rax),%ecx
  movsbl 0x6(%rax),%edx
  xor    %eax,%eax
  call   <sprintf@plt>
  mov    %rbx,0x0(%r13)
  mov    %r12,%rsi
  mov    %rbp,%rdi
  call   <strsep@plt>
  mov    $0x1,%eax
  jmp    L91
L25:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: disassemble_data
arguments: tag: D57
type_guessed: string
name: disassemble_data
arguments: tag: D0
type_guessed: string
name: disassemble_data
arguments: tag: D36
type_guessed: string
name: disassemble_data
arguments: tag: D15
type_guessed: string
name: disassemble_data
arguments: tag: D41
type_guessed: string

tool: D57: %s%s

tool: 

tool: D36: 


tool: D15: kats

tool: D41: %c%c

assistant: ```c
char *readsplit(char **a, FILE *fp, char *sep) {
  const int size = 256;
  char *s = malloc(size);
  char *buf = malloc(128);
  while ((buf = fgets(buf, size, fp)) != NULL)
    sprintf(s, "%s%s", s, buf);
  if (strcmp(s, "") == 0) {
    a = NULL;
    return "";
  }
  char *lchar = &s[strlen(s) - 1];
  if (*lchar == '\n' && *sep != '\n')
    *lchar = '\0';
  if (sep == NULL)
    return s;
  if (strcmp(sep, "\n") == 0)
    puts("kats");
  int i = 0;
  if (s[1] == 'm') {
    char *vol = malloc(4);
    sprintf(vol, "%c%c", s[6], s[7]);
    a[0] = vol;
    strsep(&s, sep);
    i++;
  }
  char *token;
  while ((token = strsep(&s, sep)) != NULL) {
    a[i] = token;
    i++;
  }
  free(s);
  return "";
}
```