user: Please show me the C implementation that matches the assembly code listed below:

```asm
<testReadFixedInt>:
  endbr64
  push   %r13
  lea    D45(%rip),%rdi
  mov    $0x1,%r13d
  push   %r12
  push   %rbp
  lea    D23(%rip),%rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  lea    0x4(%rsp),%r12
  call   <puts@plt>
  mov    %rbp,%rsi
  lea    D56(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    $0x5,%esi
  mov    %rbp,%rdi
  mov    %r12,%rdx
  xor    %eax,%eax
  call   <fiolSReadFixedInt@plt>
  mov    0x4(%rsp),%esi
  movslq %eax,%rbx
  add    %rbx,%rbp
  cmp    $0xffffee77,%esi
  je     L42
  lea    D44(%rip),%r13
  mov    $0xffffee77,%edx
  xor    %eax,%eax
  mov    %r13,%rdi
  xor    %r13d,%r13d
  call   <printf@plt>
L42:
  mov    $0x3,%esi
  mov    %rbp,%rdi
  mov    %r12,%rdx
  xor    %eax,%eax
  call   <fiolSReadFixedInt@plt>
  mov    0x4(%rsp),%esi
  cltq
  add    %rax,%rbp
  cmp    $0x1c,%esi
  jne    L16
  mov    $0x3,%esi
  mov    %r12,%rdx
  mov    %rbp,%rdi
  xor    %eax,%eax
  call   <fiolSReadFixedInt@plt>
  mov    0x4(%rsp),%esi
  cmp    $0x2a,%esi
  jne    L44
  cmp    $0x1,%r13b
  jne    L41
  lea    D37(%rip),%rdi
  call   <puts@plt>
  jmp    L41
  nopl   0x0(%rax)
L44:
  lea    D44(%rip),%r13
L61:
  mov    $0x2a,%edx
  mov    %r13,%rdi
  xor    %eax,%eax
  call   <printf@plt>
L41:
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L4
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax)
L16:
  lea    D44(%rip),%r13
  mov    $0x1c,%edx
  xor    %eax,%eax
  mov    %r13,%rdi
  call   <printf@plt>
  mov    $0x3,%esi
  mov    %r12,%rdx
  mov    %rbp,%rdi
  xor    %eax,%eax
  call   <fiolSReadFixedInt@plt>
  mov    0x4(%rsp),%esi
  cmp    $0x2a,%esi
  je     L41
  jmp    L61
L4:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: extract_symbolic_data
arguments: data_tag: D45
datatype: string
name: extract_symbolic_data
arguments: data_tag: D23
datatype: string
name: extract_symbolic_data
arguments: data_tag: D56
datatype: string
name: extract_symbolic_data
arguments: data_tag: D44
datatype: string
name: extract_symbolic_data
arguments: data_tag: D37
datatype: string

tool: D45: Testing fiolSReadFixedInt...

tool: D23: -448928+42

tool: D56: 	("%s")


tool: D44: 		failed, returned %d instead of %d


tool: D37: 		Passed!

assistant: ```c
void testReadFixedInt() {
  char str[255];
  char *msg = &str;
  char passed = 0;
  char signedChar;
  signed int signedInt;
  printf("Testing fiolSReadFixedInt...\r\n");
  msg = "-448928+42";
  passed = 1;
  printf("\t(\"%s\")\r\n", msg);
  msg += fiolSReadFixedInt(msg, 5, &signedInt);
  if (signedInt != -4489) {
    printf("\t\tfailed, returned %d instead of %d\r\n", signedInt, -4489);
    passed = 0;
  }
  msg += fiolSReadFixedInt(msg, 3, &signedInt);
  if (signedInt != 28) {
    printf("\t\tfailed, returned %d instead of %d\r\n", signedInt, 28);
    passed = 0;
  }
  msg += fiolSReadFixedInt(msg, 3, &signedInt);
  if (signedInt != +42) {
    printf("\t\tfailed, returned %d instead of %d\r\n", signedInt, +42);
    passed = 0;
  }
  if (passed == 1)
    printf("\t\tPassed!\r\n");
}
```