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

```asm
<main>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x58,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x48(%rsp)
  xor    %eax,%eax
  mov    %rsp,%rbx
  lea    D30(%rip),%rbp
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  call   <mystrcpy@plt>
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  call   <strcmp@plt>
  test   %eax,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  lea    D14(%rip),%rsi
  mov    %rbx,%rdi
  call   <strcmp@plt>
  mov    %eax,%edi
  call   <assert@plt>
  lea    D48(%rip),%rsi
  mov    %rbx,%rdi
  call   <strcmp@plt>
  mov    %eax,%edi
  call   <assert@plt>
  lea    D65(%rip),%r13
  mov    %r13,%rsi
  mov    %rbx,%rdi
  call   <mystrcpy@plt>
  mov    %r13,%rsi
  mov    %rbx,%rdi
  call   <mystrcpy@plt>
  cmpb   $0x0,(%rax)
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbp,%rdi
  call   <mystrlen@plt>
  cmp    $0xb,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbp,%rdi
  call   <mystrlen@plt>
  cmp    $0xb,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbp,%rdi
  call   <mystrlen@plt>
  cmp    $0xb,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbp,%rdi
  call   <mystrlen@plt>
  cmp    $0xb,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbp,%rdi
  call   <mystrdup@plt>
  mov    %rax,%r12
  mov    %rbp,%rsi
  mov    %rax,%rdi
  call   <strcmp@plt>
  test   %eax,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  movb   $0x59,(%r12)
  lea    D29(%rip),%rsi
  mov    %r12,%rdi
  call   <strcmp@plt>
  test   %eax,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %r12,%rdi
  call   <free@plt>
  lea    D80(%rip),%rsi
  mov    %rbx,%rdi
  call   <mystrcpy@plt>
  lea    D64(%rip),%rsi
  mov    %rbx,%rdi
  call   <mystrcat@plt>
  lea    D98(%rip),%rbp
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  call   <strcmp@plt>
  test   %eax,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %r13,%rsi
  mov    %rbx,%rdi
  call   <mystrcat@plt>
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  call   <strcmp@plt>
  test   %eax,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  lea    D34(%rip),%rsi
  mov    %rbx,%rdi
  call   <mystrcpy@plt>
  lea    D108(%rip),%rbp
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  call   <mystrstr@plt>
  mov    %rax,%rdi
  lea    D125(%rip),%rsi
  call   <strcmp@plt>
  test   %eax,%eax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  lea    D19(%rip),%rsi
  mov    %rbx,%rdi
  call   <mystrstr@plt>
  test   %rax,%rax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbx,%rsi
  mov    %rbp,%rdi
  call   <mystrstr@plt>
  test   %rax,%rax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %r13,%rsi
  mov    %rbx,%rdi
  call   <mystrstr@plt>
  cmp    %rax,%rbx
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  lea    D115(%rip),%rsi
  lea    D97(%rip),%rbx
  mov    %rbx,%rdi
  call   <mystrcmp@plt>
  shr    $0x3f,%rax
  mov    %rax,%rdi
  call   <assert@plt>
  mov    %rbx,%rsi
  lea    D36(%rip),%rbx
  mov    %rbx,%rdi
  call   <mystrcmp@plt>
  test   %rax,%rax
  setg   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    %rbx,%rsi
  mov    %rbx,%rdi
  call   <mystrcmp@plt>
  test   %rax,%rax
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  lea    D92(%rip),%rdi
  call   <printf@plt>
  mov    0x48(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L4
  mov    $0x0,%eax
  add    $0x58,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L4:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: data_tag: D30
type: string
name: read_data
arguments: data_tag: D14
type: string
name: read_data
arguments: data_tag: D48
type: string
name: read_data
arguments: data_tag: D65
type: string
name: read_data
arguments: data_tag: D29
type: string
name: read_data
arguments: data_tag: D80
type: string
name: read_data
arguments: data_tag: D64
type: string
name: read_data
arguments: data_tag: D98
type: string
name: read_data
arguments: data_tag: D34
type: string
name: read_data
arguments: data_tag: D108
type: string
name: read_data
arguments: data_tag: D125
type: string
name: read_data
arguments: data_tag: D19
type: string
name: read_data
arguments: data_tag: D115
type: string
name: read_data
arguments: data_tag: D97
type: string
name: read_data
arguments: data_tag: D36
type: string
name: read_data
arguments: data_tag: D92
type: string

tool: D30: Hello world

tool: D14: Hello worl

tool: D48: Hello worldgggg

tool: 

tool: D29: Yello world

tool: D80: Purdue

tool: D64:  University

tool: D98: Purdue University

tool: D34: The quick brown fox jumps over the lazy dog

tool: D108: jumps

tool: D125: jumps over the lazy dog

tool: D19: Hello

tool: D115: dabc

tool: D97: abcd

tool: D36: dab

tool: D92: Seems to be OK


assistant: ```c
int main() {
  char s1[64], *s2;
  mystrcpy(s1, "Hello world");
  assert(!strcmp(s1, "Hello world"));
  assert(strcmp(s1, "Hello worl"));
  assert(strcmp(s1, "Hello worldgggg"));
  mystrcpy(s1, "");
  assert(!strcmp(mystrcpy(s1, ""), ""));
  assert(mystrlen("Hello world") == 11);
  assert(mystrlen("Hello world") == 11);
  assert(mystrlen("Hello world") == 11);
  assert(mystrlen("Hello world") == 11);
  s2 = mystrdup("Hello world");
  assert(!strcmp(s2, "Hello world"));
  s2[0] = 'Y';
  assert(!strcmp(s2, "Yello world"));
  free(s2);
  mystrcpy(s1, "Purdue");
  mystrcat(s1, " University");
  assert(!strcmp(s1, "Purdue University"));
  mystrcat(s1, "");
  assert(!strcmp(s1, "Purdue University"));
  mystrcpy(s1, "The quick brown fox jumps over the lazy dog");
  s2 = mystrstr(s1, "jumps");
  assert(!strcmp(s2, "jumps over the lazy dog"));
  assert(mystrstr(s1, "Hello") == NULL);
  assert(mystrstr("jumps", s1) == NULL);
  s2 = mystrstr(s1, "");
  assert(s2 == s1);
  assert(mystrcmp("abcd", "dabc") < 0);
  assert(mystrcmp("dab", "abcd") > 0);
  assert(mystrcmp("dab", "dab") == 0);
  printf("Seems to be OK\n");
  return 0;
}
```