user: Converte this assembly snippet into its equivalent C code:

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  mov    %rsi,%r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  cmp    $0x2,%edi
  jle    L7
  mov    0x8(%rsi),%rdi
  lea    D7(%rip),%rbp
  mov    %rbp,%rsi
  call   <fopen@plt>
  mov    %rax,%r15
  test   %rax,%rax
  je     L74
  mov    0x10(%r13),%rdi
  mov    %rbp,%rsi
  call   <fopen@plt>
  mov    %rax,%r12
  test   %rax,%rax
  je     L112
  mov    %r15,%rdi
  call   <BE_Cross_FileLengthFromHandle@plt>
  mov    %r12,%rdi
  mov    %eax,%r14d
  call   <BE_Cross_FileLengthFromHandle@plt>
  mov    %r14d,%edi
  mov    %eax,%ebx
  call   <malloc@plt>
  mov    %ebx,%edi
  mov    %rax,0x8(%rsp)
  call   <malloc@plt>
  mov    0x8(%rsp),%rdi
  mov    %r14d,%esi
  mov    %r15,%rcx
  mov    %rax,%rbp
  mov    $0x1,%edx
  call   <fread@plt>
  mov    %r12,%rcx
  mov    $0x1,%edx
  mov    %ebx,%esi
  mov    %rbp,%rdi
  call   <fread@plt>
  mov    %r15,%rdi
  call   <fclose@plt>
  mov    %r12,%rdi
  call   <fclose@plt>
  sub    %ebx,%r14d
  mov    0x8(%rsp),%r9
  mov    %r14d,%r8d
  js     L10
  mov    %r9,%rdx
  xor    %ecx,%ecx
  lea    0x1(%rbx),%edi
  nopl   (%rax)
L77:
  mov    $0x1,%eax
  xor    %esi,%esi
  test   %ebx,%ebx
  jg     L109
  jmp    L92
  nopl   (%rax)
L20:
  mov    %eax,%esi
  add    $0x1,%rax
  cmp    %rdi,%rax
  je     L92
L109:
  movzbl -0x1(%rbp,%rax,1),%esi
  cmp    %sil,-0x1(%rax,%rdx,1)
  je     L20
L104:
  add    $0x1,%ecx
  add    $0x1,%rdx
  cmp    %ecx,%r8d
  jge    L77
L10:
  mov    %r9,%rdi
  call   <free@plt>
  mov    %rbp,%rdi
  call   <free@plt>
L34:
  add    $0x18,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L92:
  cmp    %esi,%ebx
  jne    L104
  mov    0x8(%r13),%rdx
  mov    0x10(%r13),%rsi
  mov    %ecx,%r8d
  xor    %eax,%eax
  lea    D34(%rip),%rdi
  mov    %r9,0x8(%rsp)
  call   <printf@plt>
  mov    0x8(%rsp),%r9
  jmp    L10
L7:
  mov    (%rsi),%rsi
  add    $0x18,%rsp
  lea    D43(%rip),%rdi
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    10e0 <printf@plt>
L112:
  xor    %edi,%edi
  call   <fclose@plt>
  mov    0x10(%r13),%rsi
  lea    D27(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  jmp    L34
L74:
  mov    0x8(%r13),%rsi
  lea    D27(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  jmp    L34
```

tool_calls: name: read_data
arguments: tag: D7
data_type: string
name: read_data
arguments: tag: D34
data_type: string
name: read_data
arguments: tag: D43
data_type: string
name: read_data
arguments: tag: D27
data_type: string

tool: D7: rb

tool: D34: Match found! %s is in %s at offset %d (0x%x).


tool: D43: Use command like this: %s <src1> <src2>


tool: D27: Cannot open %s for reading


assistant: ```c
int main(int argc, char **argv) {
  if (argc < 3) {
    printf("Use command like this: %s <src1> <src2>\n", argv[0]);
    return;
  }
  FILE *fp1 = fopen(argv[1], "rb");
  if (!fp1) {
    printf("Cannot open %s for reading\n", argv[1]);
    return 0;
  }
  FILE *fp2 = fopen(argv[2], "rb");
  if (!fp2) {
    fclose(fp2);
    printf("Cannot open %s for reading\n", argv[2]);
    return 0;
  }
  int32_t fsize1 = BE_Cross_FileLengthFromHandle(fp1), fsize2 = BE_Cross_FileLengthFromHandle(fp2);
  unsigned char *buf1 = (unsigned char *)malloc(fsize1), *buf2 = (unsigned char *)malloc(fsize2);
  fread(buf1, fsize1, 1, fp1);
  fread(buf2, fsize2, 1, fp2);
  fclose(fp1);
  fclose(fp2);
  int buf1loopvar, buf2loopvar;
  for (buf1loopvar = 0; buf1loopvar <= fsize1 - fsize2; ++buf1loopvar) {
    for (buf2loopvar = 0; buf2loopvar < fsize2; ++buf2loopvar) {
      if (buf1[buf1loopvar + buf2loopvar] != buf2[buf2loopvar])
        break;
    }
    if (buf2loopvar == fsize2) {
      printf("Match found! %s is in %s at offset %d (0x%x).\n", argv[2], argv[1], buf1loopvar, buf1loopvar);
      break;
    }
  }
  free(buf1);
  free(buf2);
  return 0;
}
```