source/modules/ysfx/sources/ysfx_eel_utils.cpp

   1 // Copyright 2021 Jean Pierre Cimalando
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14 //
  15 // SPDX-License-Identifier: Apache-2.0
  16 //
  17
  18 #include "ysfx_eel_utils.hpp"
  19
  20 ysfx_eel_ram_reader::ysfx_eel_ram_reader(NSEEL_VMCTX vm, int64_t addr)
  21     : m_vm(vm),
  22       m_addr(addr)
  23 {
  24 }
  25
  26 EEL_F ysfx_eel_ram_reader::read_next()
  27 {
  28     if (m_block_avail == 0) {
  29         m_block = (m_addr < 0 || m_addr > 0xFFFFFFFFu) ? nullptr :
  30             NSEEL_VM_getramptr_noalloc(m_vm, (uint32_t)m_addr, (int32_t *)&m_block_avail);
  31         if (m_block)
  32             m_addr += m_block_avail;
  33         else {
  34             m_addr += 1;
  35             m_block_avail = 1;
  36         }
  37     }
  38     EEL_F value = m_block ? *m_block++ : 0;
  39     m_block_avail -= 1;
  40     return value;
  41 }
  42
  43 //------------------------------------------------------------------------------
  44 ysfx_eel_ram_writer::ysfx_eel_ram_writer(NSEEL_VMCTX vm, int64_t addr)
  45     : m_vm(vm),
  46       m_addr(addr)
  47 {
  48 }
  49
  50 bool ysfx_eel_ram_writer::write_next(EEL_F value)
  51 {
  52     if (m_block_avail == 0) {
  53         m_block = (m_addr < 0 || m_addr > 0xFFFFFFFFu) ? nullptr :
  54             NSEEL_VM_getramptr(m_vm, (uint32_t)m_addr, (int32_t *)&m_block_avail);
  55         if (m_block)
  56             m_addr += m_block_avail;
  57         else {
  58             m_addr += 1;
  59             m_block_avail = 1;
  60         }
  61     }
  62     if (m_block)
  63         *m_block++ = value;
  64     m_block_avail -= 1;
  65     return true;
  66 }