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

```asm
<Mx1_rewrap>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %rbx
  sub    $0x178,%rsp
  mov    %rdi,-0x148(%rbp)
  mov    %rsi,-0x150(%rbp)
  mov    %rdx,-0x158(%rbp)
  mov    %rcx,-0x160(%rbp)
  mov    %r8,-0x168(%rbp)
  mov    %r9,-0x170(%rbp)
  mov    0x10(%rbp),%rax
  mov    %rax,-0x178(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x18(%rbp)
  xor    %eax,%eax
  mov    -0x150(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x138(%rbp)
  mov    -0x158(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,-0x130(%rbp)
  mov    -0x138(%rbp),%rax
  mov    $0x7d,%esi
  mov    %rax,%rdi
  call   <strchr@plt>
  mov    %rax,-0x128(%rbp)
  cmpq   $0x0,-0x128(%rbp)
  jne    L35
  mov    -0x168(%rbp),%rdx
  lea    -0x120(%rbp),%rax
  lea    D12(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <sprintf@plt>
  lea    -0x120(%rbp),%rcx
  mov    -0x148(%rbp),%rax
  mov    $0x0,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <Mx1_report_error@plt>
  mov    $0xffffffff,%eax
  jmp    L79
L35:
  mov    -0x128(%rbp),%rax
  sub    -0x138(%rbp),%rax
  mov    %eax,-0x140(%rbp)
  mov    0x18(%rbp),%eax
  and    $0x2,%eax
  test   %eax,%eax
  je     L0
  movl   $0x0,-0x140(%rbp)
L0:
  cmpl   $0x0,-0x140(%rbp)
  jle    L4
  mov    -0x140(%rbp),%ecx
  lea    -0x120(%rbp),%rdx
  mov    -0x138(%rbp),%rsi
  mov    -0x148(%rbp),%rax
  mov    $0x1,%r9d
  mov    %ecx,%r8d
  mov    $0x0,%ecx
  mov    %rax,%rdi
  call   <Mx1_substitute@plt>
  mov    %eax,-0x13c(%rbp)
  cmpl   $0x0,-0x13c(%rbp)
  jg     L99
  mov    -0x13c(%rbp),%eax
  jmp    L79
L99:
  lea    -0x120(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %eax,-0x140(%rbp)
L4:
  mov    -0x130(%rbp),%rax
  sub    -0x160(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x140(%rbp),%eax
  cltq
  lea    (%rdx,%rax,1),%rbx
  mov    -0x170(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  cltq
  add    %rax,%rbx
  mov    -0x178(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  cltq
  add    %rbx,%rax
  cmp    $0xff,%rax
  jle    L47
  mov    -0x148(%rbp),%rax
  mov    $0x0,%edx
  lea    D5(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <Mx1_report_error@plt>
  mov    $0xffffffff,%eax
  jmp    L79
L47:
  mov    -0x170(%rbp),%rdx
  mov    -0x130(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcpy@plt>
  mov    -0x170(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  cltq
  add    %rax,-0x130(%rbp)
  cmpl   $0x0,-0x140(%rbp)
  jle    L27
  mov    -0x140(%rbp),%edx
  lea    -0x120(%rbp),%rcx
  mov    -0x130(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncpy@plt>
L27:
  mov    -0x140(%rbp),%eax
  cltq
  add    %rax,-0x130(%rbp)
  mov    -0x178(%rbp),%rdx
  mov    -0x130(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcpy@plt>
  mov    -0x178(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  cltq
  add    %rax,-0x130(%rbp)
  mov    -0x150(%rbp),%rax
  mov    (%rax),%rdx
  mov    -0x128(%rbp),%rax
  sub    -0x138(%rbp),%rax
  add    %rax,%rdx
  mov    -0x150(%rbp),%rax
  mov    %rdx,(%rax)
  mov    -0x158(%rbp),%rax
  mov    -0x130(%rbp),%rdx
  mov    %rdx,(%rax)
  mov    $0x1,%eax
L79:
  mov    -0x18(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L25
  call   <__stack_chk_fail@plt>
L25:
  mov    -0x8(%rbp),%rbx
  leave
  ret
```

tool_calls: name: unpack_data
arguments: label: D12
data_type: string
name: unpack_data
arguments: label: D5
data_type: string

tool: D12: No closing bracket found for '%s'

tool: D5: Line length overflow while text substitution

assistant: ```c
int Mx1_rewrap(struct Mx1 *m, char **read_pt, char **write_pt, char *write_base, char *envelope, char *front, char *back, int flag) {
  char *rpt, *wpt, *ept, content[256], msg[256];
  int l, ret;
  rpt = *read_pt;
  wpt = *write_pt;
  ept = strchr(rpt, '}');
  if (ept == NULL) {
    sprintf(msg, "No closing bracket found for '%s'", envelope);
    Mx1_report_error(m, msg, 0);
    return (-1);
  }
  l = ept - rpt;
  if (flag & 2)
    l = 0;
  if (l > 0) {
    ret = Mx1_substitute(m, rpt, content, 0, l, 1);
    if (ret <= 0)
      return (ret);
    l = strlen(content);
  }
  if ((wpt - write_base) + l + strlen(front) + strlen(back) > 255) {
    Mx1_report_error(m, "Line length overflow while text substitution", 0);
    return (-1);
  }
  strcpy(wpt, front);
  wpt += strlen(front);
  if (l > 0)
    strncpy(wpt, content, l);
  wpt += l;
  strcpy(wpt, back);
  wpt += strlen(back);
  (*read_pt) += ept - rpt;
  (*write_pt) = wpt;
  return (1);
}
```