user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<itostr>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %edi,-0x14(%rbp)
  mov    %esi,-0x18(%rbp)
  mov    %edx,-0x1c(%rbp)
  mov    %ecx,-0x20(%rbp)
  movl   $0xa,-0x4(%rbp)
  cmpl   $0x1e,-0x18(%rbp)
  jle    L60
  movb   $0x0,D60(%rip)
  jmp    L10
L60:
  cmpl   $0x0,-0x14(%rbp)
  je     L102
  cmpl   $0x3,-0x1c(%rbp)
  je     L235
  cmpl   $0x3,-0x1c(%rbp)
  jg     L156
  cmpl   $0x1,-0x1c(%rbp)
  je     L8
  cmpl   $0x2,-0x1c(%rbp)
  jne    L156
  movl   $0x2,-0x4(%rbp)
  jmp    L156
L8:
  movl   $0xa,-0x4(%rbp)
  jmp    L156
L235:
  movl   $0x10,-0x4(%rbp)
  nop
L156:
  mov    -0x18(%rbp),%eax
  mov    %al,-0x6(%rbp)
  jmp    L228
L17:
  mov    -0x14(%rbp),%eax
  cltd
  idivl  -0x4(%rbp)
  mov    %edx,%eax
  mov    %al,-0x5(%rbp)
  cmpl   $0x3,-0x1c(%rbp)
  jne    L169
  cmpb   $0x9,-0x5(%rbp)
  jle    L244
  movzbl -0x5(%rbp),%eax
  lea    0x37(%rax),%edx
  movsbl -0x6(%rbp),%eax
  sub    $0x1,%eax
  mov    %edx,%ecx
  cltq
  lea    D60(%rip),%rdx
  mov    %cl,(%rax,%rdx,1)
  jmp    L37
L244:
  movzbl -0x5(%rbp),%eax
  lea    0x30(%rax),%edx
  movsbl -0x6(%rbp),%eax
  sub    $0x1,%eax
  mov    %edx,%ecx
  cltq
  lea    D60(%rip),%rdx
  mov    %cl,(%rax,%rdx,1)
  jmp    L37
L169:
  cmpl   $0x1,-0x1c(%rbp)
  jne    L5
  cmpl   $0x0,-0x14(%rbp)
  jne    L121
  cmpl   $0x0,-0x20(%rbp)
  je     L121
  movsbl -0x6(%rbp),%eax
  sub    $0x1,%eax
  cltq
  lea    D60(%rip),%rdx
  movb   $0x20,(%rax,%rdx,1)
  jmp    L37
L121:
  movzbl -0x5(%rbp),%eax
  lea    0x30(%rax),%edx
  movsbl -0x6(%rbp),%eax
  sub    $0x1,%eax
  mov    %edx,%ecx
  cltq
  lea    D60(%rip),%rdx
  mov    %cl,(%rax,%rdx,1)
  jmp    L37
L5:
  movzbl -0x5(%rbp),%eax
  lea    0x30(%rax),%edx
  movsbl -0x6(%rbp),%eax
  sub    $0x1,%eax
  mov    %edx,%ecx
  cltq
  lea    D60(%rip),%rdx
  mov    %cl,(%rax,%rdx,1)
L37:
  mov    -0x14(%rbp),%eax
  cltd
  idivl  -0x4(%rbp)
  mov    %eax,-0x14(%rbp)
  movzbl -0x6(%rbp),%eax
  sub    $0x1,%eax
  mov    %al,-0x6(%rbp)
L228:
  cmpb   $0x0,-0x6(%rbp)
  jg     L17
  mov    -0x18(%rbp),%eax
  cltq
  lea    D60(%rip),%rdx
  movb   $0x0,(%rax,%rdx,1)
  jmp    L10
L102:
  cmpl   $0x1,-0x1c(%rbp)
  jne    L159
  cmpl   $0x0,-0x20(%rbp)
  je     L159
  movb   $0x0,-0x6(%rbp)
  jmp    L151
L134:
  movzbl -0x6(%rbp),%eax
  movzbl %al,%eax
  cltq
  lea    D60(%rip),%rdx
  movb   $0x20,(%rax,%rdx,1)
  movzbl -0x6(%rbp),%eax
  add    $0x1,%eax
  mov    %al,-0x6(%rbp)
L151:
  movsbl -0x6(%rbp),%eax
  cmp    %eax,-0x18(%rbp)
  jg     L134
  mov    -0x18(%rbp),%eax
  sub    $0x1,%eax
  cltq
  lea    D60(%rip),%rdx
  movb   $0x30,(%rax,%rdx,1)
  mov    -0x18(%rbp),%eax
  cltq
  lea    D60(%rip),%rdx
  movb   $0x0,(%rax,%rdx,1)
  jmp    L10
L159:
  movb   $0x0,-0x6(%rbp)
  jmp    L136
L246:
  movzbl -0x6(%rbp),%eax
  movzbl %al,%eax
  cltq
  lea    D60(%rip),%rdx
  movb   $0x30,(%rax,%rdx,1)
  movzbl -0x6(%rbp),%eax
  add    $0x1,%eax
  mov    %al,-0x6(%rbp)
L136:
  movsbl -0x6(%rbp),%eax
  cmp    %eax,-0x18(%rbp)
  jg     L246
  movzbl -0x6(%rbp),%eax
  movzbl %al,%eax
  cltq
  lea    D60(%rip),%rdx
  movb   $0x0,(%rax,%rdx,1)
L10:
  lea    D60(%rip),%rax
  pop    %rbp
  ret
```

assistant: ```c
char *itostr(u_int iNumber, u_char cDigits, u_char cMode, u_char cDec_mode) {
  static char cBuffer[31];
  char c, cMod;
  u_int iDivisor = 10;
  if (cDigits > 30) {
    cBuffer[0] = '\0';
  } else {
    if (iNumber) {
      switch (cMode) {
      case 2:
        iDivisor = 2;
        break;
      case 1:
        iDivisor = 10;
        break;
      case 3:
        iDivisor = 16;
        break;
      }
      for (c = cDigits; c > 0; c--) {
        cMod = iNumber % iDivisor;
        if (cMode == 3) {
          if (cMod > 9)
            cBuffer[c - 1] = cMod + 55;
          else
            cBuffer[c - 1] = cMod + 48;
        } else {
          if (cMode == 1) {
            if ((!iNumber) && (cDec_mode))
              cBuffer[c - 1] = ' ';
            else
              cBuffer[c - 1] = cMod + 48;
          } else
            cBuffer[c - 1] = cMod + 48;
        }
        iNumber /= iDivisor;
      }
      cBuffer[cDigits] = '\0';
    } else {
      if ((cMode == 1) && (cDec_mode)) {
        for (c = 0; c < cDigits; c++)
          cBuffer[(unsigned char)c] = ' ';
        cBuffer[cDigits - 1] = '0';
        cBuffer[cDigits] = '\0';
      } else {
        for (c = 0; c < cDigits; c++)
          cBuffer[(unsigned char)c] = '0';
        cBuffer[(unsigned char)c] = '\0';
      }
    }
  }
  return (cBuffer);
}
```