user: Translate the below assembly code into C programming language:

```asm
<process_buffer>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x70,%rsp
  mov    %rdi,-0x58(%rbp)
  mov    %esi,-0x5c(%rbp)
  mov    %rdx,-0x68(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x0,-0x38(%rbp)
  movl   $0x0,-0x34(%rbp)
  mov    -0x68(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  lea    D9(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  jmp    L98
L1:
  mov    -0x38(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  and    $0x40,%eax
  test   %eax,%eax
  je     L16
  mov    -0x38(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x58(%rbp),%rax
  lea    (%rdx,%rax,1),%rdi
  lea    -0x3c(%rbp),%r8
  lea    -0x40(%rbp),%rsi
  lea    -0x44(%rbp),%rcx
  lea    -0x48(%rbp),%rdx
  lea    -0x30(%rbp),%rax
  mov    %r8,%r9
  mov    %rsi,%r8
  mov    %rax,%rsi
  call   <decode_long_entry@plt>
  mov    -0x40(%rbp),%edx
  mov    -0x44(%rbp),%esi
  mov    -0x48(%rbp),%eax
  lea    -0x18(%rbp),%r8
  lea    -0x28(%rbp),%rdi
  lea    -0x20(%rbp),%rcx
  mov    %r8,%r9
  mov    %rdi,%r8
  mov    %eax,%edi
  call   <ecef_to_geo@plt>
  mov    -0x38(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  and    $0x20,%eax
  test   %eax,%eax
  je     L59
  movl   $0x1,-0x34(%rbp)
L59:
  cmpq   $0x0,-0x10(%rbp)
  jle    L28
  mov    -0x10(%rbp),%rax
  lea    0xe10(%rax),%rdx
  mov    -0x30(%rbp),%rax
  cmp    %rax,%rdx
  jge    L28
  lea    D6(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
L28:
  mov    -0x3c(%rbp),%ecx
  movsd  -0x18(%rbp),%xmm1
  movsd  -0x20(%rbp),%xmm0
  mov    -0x28(%rbp),%rdx
  mov    -0x30(%rbp),%rax
  mov    %ecx,%esi
  movapd %xmm1,%xmm2
  movapd %xmm0,%xmm1
  movq   %rdx,%xmm0
  mov    %rax,%rdi
  call   <output_gpx_trk_point@plt>
  addl   $0x12,-0x38(%rbp)
  jmp    L2
L16:
  mov    -0x38(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x80,%al
  jne    L68
  mov    -0x38(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x58(%rbp),%rax
  lea    (%rdx,%rax,1),%rdi
  lea    -0x3c(%rbp),%r8
  lea    -0x40(%rbp),%rsi
  lea    -0x44(%rbp),%rcx
  lea    -0x48(%rbp),%rdx
  lea    -0x30(%rbp),%rax
  mov    %r8,%r9
  mov    %rsi,%r8
  mov    %rax,%rsi
  call   <decode_short_entry@plt>
  mov    -0x40(%rbp),%edx
  mov    -0x44(%rbp),%esi
  mov    -0x48(%rbp),%eax
  lea    -0x18(%rbp),%r8
  lea    -0x28(%rbp),%rdi
  lea    -0x20(%rbp),%rcx
  mov    %r8,%r9
  mov    %rdi,%r8
  mov    %eax,%edi
  call   <ecef_to_geo@plt>
  cmpq   $0x0,-0x10(%rbp)
  jle    L49
  mov    -0x10(%rbp),%rax
  lea    0xe10(%rax),%rdx
  mov    -0x30(%rbp),%rax
  cmp    %rax,%rdx
  jge    L49
  lea    D6(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
L49:
  mov    -0x3c(%rbp),%ecx
  movsd  -0x18(%rbp),%xmm1
  movsd  -0x20(%rbp),%xmm0
  mov    -0x28(%rbp),%rdx
  mov    -0x30(%rbp),%rax
  mov    %ecx,%esi
  movapd %xmm1,%xmm2
  movapd %xmm0,%xmm1
  movq   %rdx,%xmm0
  mov    %rax,%rdi
  call   <output_gpx_trk_point@plt>
  addl   $0x8,-0x38(%rbp)
  jmp    L2
L68:
  addl   $0x1,-0x38(%rbp)
L2:
  mov    -0x30(%rbp),%rax
  mov    %rax,-0x10(%rbp)
L98:
  mov    -0x38(%rbp),%eax
  cmp    -0x5c(%rbp),%eax
  jl     L1
  mov    -0x10(%rbp),%rax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L11
  call   <__stack_chk_fail@plt>
L11:
  leave
  ret
```

tool_calls: name: read_data
arguments: label: D9
type: string
name: read_data
arguments: label: D6
type: string

tool: D9: <!-- next sector -->


tool: D6: </trkseg>
<trkseg>


assistant: ```c
long process_buffer(const unsigned char *buffer, const int length, const long first_timestamp) {
  int offset = 0;
  long time;
  int ecef_x, ecef_y, ecef_z, speed;
  double latitude, longitude, height;
  int tagged_entry = 0;
  long last_timestamp = first_timestamp;
  ;
  printf("<!-- next sector -->\n");
  while (offset < length) {
    if (buffer[offset] & 0x40) {
      decode_long_entry(buffer + offset, &time, &ecef_x, &ecef_y, &ecef_z, &speed);
      ecef_to_geo(ecef_x, ecef_y, ecef_z, &longitude, &latitude, &height);
      if (buffer[offset] & 0x20) {
        tagged_entry = 1;
      }
      if ((last_timestamp > 0) && (time > (last_timestamp + 3600l))) {
        printf("</trkseg>\n<trkseg>\n");
      }
      output_gpx_trk_point(time, latitude, longitude, height, speed);
      offset += 18;
    } else if (buffer[offset] == 0x80) {
      decode_short_entry(buffer + offset, &time, &ecef_x, &ecef_y, &ecef_z, &speed);
      ecef_to_geo(ecef_x, ecef_y, ecef_z, &longitude, &latitude, &height);
      if ((last_timestamp > 0) && (time > (last_timestamp + 3600l))) {
        printf("</trkseg>\n<trkseg>\n");
      }
      output_gpx_trk_point(time, latitude, longitude, height, speed);
      offset += 8;
    } else {
      offset++;
    }
    last_timestamp = time;
  }
  return last_timestamp;
}
```