user: 请将以下的汇编代码转换成C语言代码：

```asm
<setFilenameFromEnvironment>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  lea    D7(%rip),%rdi
  call   <getenv@plt>
  test   %rax,%rax
  je     L168
  mov    %rax,%rbp
  cmpb   $0x0,(%rax)
  je     L85
  movq   $0x0,(%rsp)
  movq   $0x0,0x8(%rsp)
  movzbl (%rax),%eax
  test   %al,%al
  je     L203
  mov    $0x0,%ebx
  mov    $0x0,%r12d
  mov    $0x0,%edx
  lea    D8(%rip),%r13
  jmp    L50
L208:
  mov    $0x0,%eax
  call   <getpid@plt>
  mov    %eax,%ecx
  mov    %rsp,%rdi
  mov    %r13,%rdx
  mov    $0x10,%esi
  call   <snprintf@plt>
  mov    %eax,%r12d
  test   %eax,%eax
  jle    L15
  mov    $0x1,%edx
L79:
  add    $0x1,%ebx
  movslq %ebx,%rax
  movzbl 0x0(%rbp,%rax,1),%eax
  test   %al,%al
  je     L2
L50:
  cmp    $0x25,%al
  jne    L79
  add    $0x1,%ebx
  movslq %ebx,%rax
  cmpb   $0x70,0x0(%rbp,%rax,1)
  jne    L79
  test   %edx,%edx
  je     L208
  add    $0x1,%edx
  jmp    L79
L2:
  test   %edx,%edx
  je     L203
  lea    -0x2(%r12),%eax
  imul   %edx,%eax
  lea    0x1(%rbx,%rax,1),%edi
  call   <malloc@plt>
  mov    %rax,%r14
  test   %rax,%rax
  je     L20
  movzbl 0x0(%rbp),%eax
  test   %al,%al
  je     L68
  mov    $0x0,%r13d
  mov    $0x0,%ebx
  mov    %rsp,%r15
  jmp    L193
L203:
  mov    $0x0,%esi
  mov    %rbp,%rdi
  call   <setFilename@plt>
  mov    $0x0,%eax
  jmp    L73
L170:
  add    $0x1,%ebx
  movslq %ebx,%rax
  cmpb   $0x70,0x0(%rbp,%rax,1)
  je     L89
L229:
  add    $0x1,%ebx
  movslq %ebx,%rax
  movzbl 0x0(%rbp,%rax,1),%eax
  test   %al,%al
  je     L33
L193:
  cmp    $0x25,%al
  je     L170
  movslq %r13d,%rdx
  mov    %al,(%r14,%rdx,1)
  lea    0x1(%r13),%r13d
  jmp    L229
L89:
  movslq %r13d,%rdi
  add    %r14,%rdi
  mov    %r12d,%edx
  mov    %r15,%rsi
  call   <memcpy@plt>
  add    %r12d,%r13d
  jmp    L229
L68:
  mov    $0x0,%r13d
L33:
  movslq %r13d,%r13
  movb   $0x0,(%r14,%r13,1)
  mov    $0x1,%esi
  mov    %r14,%rdi
  call   <setFilename@plt>
  mov    $0x0,%eax
L73:
  mov    0x18(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L10
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L168:
  mov    $0xffffffff,%eax
  jmp    L73
L85:
  mov    $0xffffffff,%eax
  jmp    L73
L15:
  mov    $0xffffffff,%eax
  jmp    L73
L20:
  mov    $0xffffffff,%eax
  jmp    L73
L10:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: data_tag: D7
type: string
name: retrieve_data
arguments: data_tag: D8
type: string

tool: D7: LLVM_PROFILE_FILE

tool: D8: %d

assistant: ```c
int setFilenameFromEnvironment(void) {
  const char *Filename = getenv("LLVM_PROFILE_FILE");
  if (!Filename || !Filename[0])
    return -1;
  char PidChars[16] = {0};
  int NumPids = 0;
  int PidLength = 0;
  int I;
  for (I = 0; Filename[I]; ++I)
    if (Filename[I] == '%' && Filename[++I] == 'p')
      if (!NumPids++) {
        PidLength = snprintf(PidChars, 16, "%d", getpid());
        if (PidLength <= 0)
          return -1;
      }
  if (!NumPids) {
    setFilename(Filename, 0);
    return 0;
  }
  char *Allocated = (char *)malloc(I + NumPids * (PidLength - 2) + 1);
  if (!Allocated)
    return -1;
  int J;
  for (I = 0, J = 0; Filename[I]; ++I)
    if (Filename[I] == '%') {
      if (Filename[++I] == 'p') {
        memcpy(Allocated + J, PidChars, PidLength);
        J += PidLength;
      }
    } else
      Allocated[J++] = Filename[I];
  Allocated[J] = 0;
  setFilename(Allocated, 1);
  return 0;
}
```