user: What is the c source code of the assembly code below:

```asm
<find>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x58,%rsp
  mov    %rdi,%r14
  mov    %fs:0x28,%rax
  mov    %rax,0x48(%rsp)
  xor    %eax,%eax
  movzbl (%rdi),%eax
  test   %al,%al
  je     L34
  lea    0x1(%rdi),%rdx
  mov    $0x0,%ecx
L11:
  movsbl %al,%eax
  add    %eax,%ecx
  add    $0x1,%rdx
  movzbl -0x1(%rdx),%eax
  test   %al,%al
  jne    L11
  movslq %ecx,%rbx
  imul   $0x66666667,%rbx,%rbx
  sar    $0x22,%rbx
  mov    %ecx,%eax
  sar    $0x1f,%eax
  sub    %eax,%ebx
  lea    (%rbx,%rbx,4),%eax
  add    %eax,%eax
  mov    %ecx,%ebx
  sub    %eax,%ebx
  lea    D1(%rip),%rsi
  lea    D43(%rip),%rdi
  call   <fopen@plt>
  mov    %rax,%r12
  movslq %ebx,%rsi
  imul   $0x2e,%rsi,%rsi
  mov    $0x0,%edx
  mov    %rax,%rdi
  call   <fseek@plt>
  cmp    $0xffffffff,%ebx
  je     L17
L87:
  lea    0x20(%rsp),%r15
  lea    0x14(%rsp),%rax
  mov    %rax,0x8(%rsp)
  lea    D28(%rip),%r13
  jmp    L72
L110:
  add    $0x1,%ebp
  cmp    %ebp,0x14(%rsp)
  jle    L5
L56:
  mov    %r12,%rdi
  call   <ftell@plt>
  mov    %eax,%ebx
  lea    0x26(%rsp),%rcx
  lea    0x18(%rsp),%rdx
  lea    0x1c(%rsp),%r9
  lea    0x30(%rsp),%r8
  mov    %r13,%rsi
  mov    %r12,%rdi
  mov    $0x0,%eax
  call   <fscanf@plt>
  cmpl   $0x0,0x18(%rsp)
  jne    L110
  lea    0x26(%rsp),%rdi
  mov    %r14,%rsi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L110
  lea    0x2(%rbx),%esi
  movslq %esi,%rsi
  mov    $0x0,%edx
  mov    %r12,%rdi
  call   <fseek@plt>
L57:
  mov    0x48(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L106
  mov    %r12,%rax
  add    $0x58,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L5:
  mov    0x20(%rsp),%ebx
  cmp    $0xffffffff,%ebx
  je     L17
L72:
  movslq %ebx,%rbx
  lea    (%rbx,%rbx,8),%rax
  lea    (%rbx,%rax,4),%rsi
  shl    $0x2,%rsi
  mov    $0x0,%edx
  mov    %r12,%rdi
  call   <fseek@plt>
  mov    %r15,%rcx
  mov    0x8(%rsp),%rdx
  lea    D32(%rip),%rsi
  mov    %r12,%rdi
  mov    $0x0,%eax
  call   <fscanf@plt>
  cmpl   $0x0,0x14(%rsp)
  jle    L5
  mov    $0x0,%ebp
  jmp    L56
L17:
  mov    %r12,%rdi
  call   <fclose@plt>
  mov    $0x0,%r12d
  jmp    L57
L34:
  lea    D1(%rip),%rsi
  lea    D43(%rip),%rdi
  call   <fopen@plt>
  mov    %rax,%r12
  mov    $0x0,%edx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <fseek@plt>
  mov    $0x0,%ebx
  jmp    L87
L106:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: unpack_data
arguments: data_label: D1
datatype: string
name: unpack_data
arguments: data_label: D43
datatype: string
name: unpack_data
arguments: data_label: D28
datatype: string
name: unpack_data
arguments: data_label: D32
datatype: string

tool: D1: r+

tool: D43: ../create/emp

tool: D28: %d%s%s%f

tool: D32: %d%d

assistant: ```c
FILE *find(char *key) {
  FILE *fp;
  int x, h, nrec, i, j;
  long off, offr;
  int del;
  char ssn[10], name[21];
  float sal;
  int ovptr;
  for (i = x = 0; key[i] != 0; i++) {
    x = x + key[i];
  }
  h = x % 10;
  off = h * (44 + 2L);
  fp = fopen("../create/emp", "r+");
  fseek(fp, off, 0);
  for (i = h; i != -1; i = ovptr) {
    off = i * (10L + 3 * (3 + 10 + 21 + 10 + 2));
    fseek(fp, off, 0);
    fscanf(fp, "%d%d", &nrec, &ovptr);
    for (j = 0; j < nrec; j++) {
      offr = ftell(fp) + 2;
      fscanf(fp, "%d%s%s%f", &del, ssn, name, &sal);
      if ((del == 0) && (strcmp(ssn, key) == 0)) {
        fseek(fp, offr, 0);
        return fp;
      }
    }
  }
  fclose(fp);
  return 0;
}
```