newgrf_act0_industries.cpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
 */

 
#include "../stdafx.h"
#include "../debug.h"
#include "../newgrf_cargo.h"
#include "../industry.h"
#include "../industrytype.h"
#include "../industry_map.h"
#include "../newgrf_industries.h"
#include "newgrf_bytereader.h"
#include "newgrf_internal.h"
#include "newgrf_stringmapping.h"
 
#include "table/strings.h"
 
#include "../safeguards.h"

extern const IndustrySpec _origin_industry_specs[NEW_INDUSTRYOFFSET];

static ChangeInfoResult IgnoreIndustryTileProperty(int prop, ByteReader &buf)
{
  ChangeInfoResult ret = CIR_SUCCESS;
 
  switch (prop) {
    case 0x09:
    case 0x0D:
    case 0x0E:
    case 0x10:
    case 0x11:
    case 0x12:
      buf.ReadByte();
      break;
 
    case 0x0A:
    case 0x0B:
    case 0x0C:
    case 0x0F:
      buf.ReadWord();
      break;
 
    case 0x13:
      buf.Skip(buf.ReadByte() * 2);
      break;
 
    default:
      ret = CIR_UNKNOWN;
      break;
  }
  return ret;
}

static ChangeInfoResult IndustrytilesChangeInfo(uint first, uint last, int prop, ByteReader &buf)
{
  ChangeInfoResult ret = CIR_SUCCESS;
 
  if (last > NUM_INDUSTRYTILES_PER_GRF) {
    GrfMsg(1, "IndustryTilesChangeInfo: Too many industry tiles loaded ({}), max ({}). Ignoring.", last, NUM_INDUSTRYTILES_PER_GRF);
    return CIR_INVALID_ID;
  }
 
  /* Allocate industry tile specs if they haven't been allocated already. */
  if (_cur_gps.grffile->indtspec.size() < last) _cur_gps.grffile->indtspec.resize(last);
 
  for (uint id = first; id < last; ++id) {
    auto &tsp = _cur_gps.grffile->indtspec[id];
 
    if (prop != 0x08 && tsp == nullptr) {
      ChangeInfoResult cir = IgnoreIndustryTileProperty(prop, buf);
      if (cir > ret) ret = cir;
      continue;
    }
 
    switch (prop) {
      case 0x08: { // Substitute industry tile type
        uint8_t subs_id = buf.ReadByte();
        if (subs_id >= NEW_INDUSTRYTILEOFFSET) {
          /* The substitute id must be one of the original industry tile. */
          GrfMsg(2, "IndustryTilesChangeInfo: Attempt to use new industry tile {} as substitute industry tile for {}. Ignoring.", subs_id, id);
          continue;
        }
 
        /* Allocate space for this industry. */
        if (tsp == nullptr) {
          tsp = std::make_unique<IndustryTileSpec>(_industry_tile_specs[subs_id]);
 
          tsp->enabled = true;
 
          /* A copied tile should not have the animation infos copied too.
           * The anim_state should be left untouched, though
           * It is up to the author to animate them */
          tsp->anim_production = INDUSTRYTILE_NOANIM;
          tsp->anim_next = INDUSTRYTILE_NOANIM;
 
          tsp->grf_prop.local_id = id;
          tsp->grf_prop.subst_id = subs_id;
          tsp->grf_prop.SetGRFFile(_cur_gps.grffile);
          _industile_mngr.AddEntityID(id, _cur_gps.grffile->grfid, subs_id); // pre-reserve the tile slot
        }
        break;
      }
 
      case 0x09: { // Industry tile override
        uint8_t ovrid = buf.ReadByte();
 
        /* The industry being overridden must be an original industry. */
        if (ovrid >= NEW_INDUSTRYTILEOFFSET) {
          GrfMsg(2, "IndustryTilesChangeInfo: Attempt to override new industry tile {} with industry tile id {}. Ignoring.", ovrid, id);
          continue;
        }
 
        _industile_mngr.Add(id, _cur_gps.grffile->grfid, ovrid);
        break;
      }
 
      case 0x0A: // Tile acceptance
      case 0x0B:
      case 0x0C: {
        uint16_t acctp = buf.ReadWord();
        tsp->accepts_cargo[prop - 0x0A] = GetCargoTranslation(GB(acctp, 0, 8), _cur_gps.grffile);
        tsp->acceptance[prop - 0x0A] = Clamp(GB(acctp, 8, 8), 0, 16);
        tsp->accepts_cargo_label[prop - 0x0A] = CT_INVALID;
        break;
      }
 
      case 0x0D: // Land shape flags
        tsp->slopes_refused = (Slope)buf.ReadByte();
        break;
 
      case 0x0E: // Callback mask
        tsp->callback_mask = static_cast<IndustryTileCallbackMasks>(buf.ReadByte());
        break;
 
      case 0x0F: // Animation information
        tsp->animation.frames = buf.ReadByte();
        tsp->animation.status = static_cast<AnimationStatus>(buf.ReadByte());
        break;
 
      case 0x10: // Animation speed
        tsp->animation.speed = buf.ReadByte();
        break;
 
      case 0x11: // Triggers for callback 25
        tsp->animation.triggers = static_cast<IndustryAnimationTriggers>(buf.ReadByte());
        break;
 
      case 0x12: // Special flags
        tsp->special_flags = IndustryTileSpecialFlags{buf.ReadByte()};
        break;
 
      case 0x13: { // variable length cargo acceptance
        uint8_t num_cargoes = buf.ReadByte();
        if (num_cargoes > std::size(tsp->acceptance)) {
          GRFError *error = DisableGrf(STR_NEWGRF_ERROR_LIST_PROPERTY_TOO_LONG);
          error->param_value[1] = prop;
          return CIR_DISABLED;
        }
        for (uint i = 0; i < std::size(tsp->acceptance); i++) {
          if (i < num_cargoes) {
            tsp->accepts_cargo[i] = GetCargoTranslation(buf.ReadByte(), _cur_gps.grffile);
            /* Tile acceptance can be negative to counteract the IndustryTileSpecialFlag::AcceptsAllCargo flag */
            tsp->acceptance[i] = (int8_t)buf.ReadByte();
          } else {
            tsp->accepts_cargo[i] = INVALID_CARGO;
            tsp->acceptance[i] = 0;
          }
          if (i < std::size(tsp->accepts_cargo_label)) tsp->accepts_cargo_label[i] = CT_INVALID;
        }
        break;
      }
 
      case 0x14: // Badge list
        tsp->badges = ReadBadgeList(buf, GSF_INDUSTRYTILES);
        break;
 
      default:
        ret = CIR_UNKNOWN;
        break;
    }
  }
 
  return ret;
}

static ChangeInfoResult IgnoreIndustryProperty(int prop, ByteReader &buf)
{
  ChangeInfoResult ret = CIR_SUCCESS;
 
  switch (prop) {
    case 0x09:
    case 0x0B:
    case 0x0F:
    case 0x12:
    case 0x13:
    case 0x14:
    case 0x17:
    case 0x18:
    case 0x19:
    case 0x21:
    case 0x22:
      buf.ReadByte();
      break;
 
    case 0x0C:
    case 0x0D:
    case 0x0E:
    case 0x10: // INDUSTRY_ORIGINAL_NUM_OUTPUTS bytes
    case 0x1B:
    case 0x1F:
    case 0x24:
      buf.ReadWord();
      break;
 
    case 0x11: // INDUSTRY_ORIGINAL_NUM_INPUTS bytes + 1
    case 0x1A:
    case 0x1C:
    case 0x1D:
    case 0x1E:
    case 0x20:
    case 0x23:
      buf.ReadDWord();
      break;
 
    case 0x0A: {
      uint8_t num_table = buf.ReadByte();
      for (uint8_t j = 0; j < num_table; j++) {
        for (uint k = 0;; k++) {
          uint8_t x = buf.ReadByte();
          if (x == 0xFE && k == 0) {
            buf.ReadByte();
            buf.ReadByte();
            break;
          }
 
          uint8_t y = buf.ReadByte();
          if (x == 0 && y == 0x80) break;
 
          uint8_t gfx = buf.ReadByte();
          if (gfx == 0xFE) buf.ReadWord();
        }
      }
      break;
    }
 
    case 0x16:
      for (uint8_t j = 0; j < INDUSTRY_ORIGINAL_NUM_INPUTS; j++) buf.ReadByte();
      break;
 
    case 0x15:
    case 0x25:
    case 0x26:
    case 0x27:
      buf.Skip(buf.ReadByte());
      break;
 
    case 0x28: {
      int num_inputs = buf.ReadByte();
      int num_outputs = buf.ReadByte();
      buf.Skip(num_inputs * num_outputs * 2);
      break;
    }
 
    case 0x29: // Badge list
      SkipBadgeList(buf);
      break;
 
    default:
      ret = CIR_UNKNOWN;
      break;
  }
  return ret;
}

static bool ValidateIndustryLayout(const IndustryTileLayout &layout)
{
  const size_t size = layout.size();
  if (size == 0) return false;
 
  for (size_t i = 0; i < size - 1; i++) {
    for (size_t j = i + 1; j < size; j++) {
      if (layout[i].ti.x == layout[j].ti.x &&
          layout[i].ti.y == layout[j].ti.y) {
        return false;
      }
    }
  }
 
  bool have_regular_tile = false;
  for (const auto &tilelayout : layout) {
    if (tilelayout.gfx != GFX_WATERTILE_SPECIALCHECK) {
      have_regular_tile = true;
      break;
    }
  }
 
  return have_regular_tile;
}

static ChangeInfoResult IndustriesChangeInfo(uint first, uint last, int prop, ByteReader &buf)
{
  ChangeInfoResult ret = CIR_SUCCESS;
 
  if (last > NUM_INDUSTRYTYPES_PER_GRF) {
    GrfMsg(1, "IndustriesChangeInfo: Too many industries loaded ({}), max ({}). Ignoring.", last, NUM_INDUSTRYTYPES_PER_GRF);
    return CIR_INVALID_ID;
  }
 
  /* Allocate industry specs if they haven't been allocated already. */
  if (_cur_gps.grffile->industryspec.size() < last) _cur_gps.grffile->industryspec.resize(last);
 
  for (uint id = first; id < last; ++id) {
    auto &indsp = _cur_gps.grffile->industryspec[id];
 
    if (prop != 0x08 && indsp == nullptr) {
      ChangeInfoResult cir = IgnoreIndustryProperty(prop, buf);
      if (cir > ret) ret = cir;
      continue;
    }
 
    switch (prop) {
      case 0x08: { // Substitute industry type
        uint8_t subs_id = buf.ReadByte();
        if (subs_id == 0xFF) {
          /* Instead of defining a new industry, a substitute industry id
           * of 0xFF disables the old industry with the current id. */
          _industry_specs[id].enabled = false;
          continue;
        } else if (subs_id >= NEW_INDUSTRYOFFSET) {
          /* The substitute id must be one of the original industry. */
          GrfMsg(2, "_industry_specs: Attempt to use new industry {} as substitute industry for {}. Ignoring.", subs_id, id);
          continue;
        }
 
        /* Allocate space for this industry.
         * Only need to do it once. If ever it is called again, it should not
         * do anything */
        if (indsp == nullptr) {
          indsp = std::make_unique<IndustrySpec>(_origin_industry_specs[subs_id]);
 
          indsp->enabled = true;
          indsp->grf_prop.local_id = id;
          indsp->grf_prop.subst_id = subs_id;
          indsp->grf_prop.SetGRFFile(_cur_gps.grffile);
          /* If the grf industry needs to check its surrounding upon creation, it should
           * rely on callbacks, not on the original placement functions */
          indsp->check_proc = CHECK_NOTHING;
        }
        break;
      }
 
      case 0x09: { // Industry type override
        uint8_t ovrid = buf.ReadByte();
 
        /* The industry being overridden must be an original industry. */
        if (ovrid >= NEW_INDUSTRYOFFSET) {
          GrfMsg(2, "IndustriesChangeInfo: Attempt to override new industry {} with industry id {}. Ignoring.", ovrid, id);
          continue;
        }
        indsp->grf_prop.override_id = ovrid;
        _industry_mngr.Add(id, _cur_gps.grffile->grfid, ovrid);
        break;
      }
 
      case 0x0A: { // Set industry layout(s)
        uint8_t new_num_layouts = buf.ReadByte();
        uint32_t definition_size = buf.ReadDWord();
        uint32_t bytes_read = 0;
        std::vector<IndustryTileLayout> new_layouts;
        IndustryTileLayout layout;
 
        for (uint8_t j = 0; j < new_num_layouts; j++) {
          layout.clear();
 
          for (uint k = 0;; k++) {
            if (bytes_read >= definition_size) {
              GrfMsg(3, "IndustriesChangeInfo: Incorrect size for industry tile layout definition for industry {}.", id);
              /* Avoid warning twice */
              definition_size = UINT32_MAX;
            }
 
            IndustryTileLayoutTile &it = layout.emplace_back();
 
            it.ti.x = buf.ReadByte(); // Offsets from northernmost tile
            ++bytes_read;
 
            if (it.ti.x == 0xFE && k == 0) {
              /* This means we have to borrow the layout from an old industry */
              IndustryType type = buf.ReadByte();
              uint8_t laynbr = buf.ReadByte();
              bytes_read += 2;
 
              if (type >= lengthof(_origin_industry_specs)) {
                GrfMsg(1, "IndustriesChangeInfo: Invalid original industry number for layout import, industry {}", id);
                DisableGrf(STR_NEWGRF_ERROR_INVALID_ID);
                return CIR_DISABLED;
              }
              if (laynbr >= _origin_industry_specs[type].layouts.size()) {
                GrfMsg(1, "IndustriesChangeInfo: Invalid original industry layout index for layout import, industry {}", id);
                DisableGrf(STR_NEWGRF_ERROR_INVALID_ID);
                return CIR_DISABLED;
              }
              layout = _origin_industry_specs[type].layouts[laynbr];
              break;
            }
 
            it.ti.y = buf.ReadByte(); // Or table definition finalisation
            ++bytes_read;
 
            if (it.ti.x == 0 && it.ti.y == 0x80) {
              /* Terminator, remove and finish up */
              layout.pop_back();
              break;
            }
 
            it.gfx = buf.ReadByte();
            ++bytes_read;
 
            if (it.gfx == 0xFE) {
              /* Use a new tile from this GRF */
              int local_tile_id = buf.ReadWord();
              bytes_read += 2;
 
              /* Read the ID from the _industile_mngr. */
              int tempid = _industile_mngr.GetID(local_tile_id, _cur_gps.grffile->grfid);
 
              if (tempid == INVALID_INDUSTRYTILE) {
                GrfMsg(2, "IndustriesChangeInfo: Attempt to use industry tile {} with industry id {}, not yet defined. Ignoring.", local_tile_id, id);
              } else {
                /* Declared as been valid, can be used */
                it.gfx = tempid;
              }
            } else if (it.gfx == GFX_WATERTILE_SPECIALCHECK) {
              it.ti.x = (int8_t)GB(it.ti.x, 0, 8);
              it.ti.y = (int8_t)GB(it.ti.y, 0, 8);
 
              /* When there were only 256x256 maps, TileIndex was a uint16_t and
               * it.ti was just a TileIndexDiff that was added to it.
               * As such negative "x" values were shifted into the "y" position.
               *   x = -1, y = 1 -> x = 255, y = 0
               * Since GRF version 8 the position is interpreted as pair of independent int8.
               * For GRF version < 8 we need to emulate the old shifting behaviour.
               */
              if (_cur_gps.grffile->grf_version < 8 && it.ti.x < 0) it.ti.y += 1;
            }
          }
 
          if (!ValidateIndustryLayout(layout)) {
            /* The industry layout was not valid, so skip this one. */
            GrfMsg(1, "IndustriesChangeInfo: Invalid industry layout for industry id {}. Ignoring", id);
          } else {
            new_layouts.push_back(layout);
          }
        }
 
        /* Install final layout construction in the industry spec */
        indsp->layouts = std::move(new_layouts);
        break;
      }
 
      case 0x0B: // Industry production flags
        indsp->life_type = IndustryLifeTypes{buf.ReadByte()};
        break;
 
      case 0x0C: // Industry closure message
        AddStringForMapping(GRFStringID{buf.ReadWord()}, &indsp->closure_text);
        break;
 
      case 0x0D: // Production increase message
        AddStringForMapping(GRFStringID{buf.ReadWord()}, &indsp->production_up_text);
        break;
 
      case 0x0E: // Production decrease message
        AddStringForMapping(GRFStringID{buf.ReadWord()}, &indsp->production_down_text);
        break;
 
      case 0x0F: // Fund cost multiplier
        indsp->cost_multiplier = buf.ReadByte();
        break;
 
      case 0x10: // Production cargo types
        for (uint8_t j = 0; j < INDUSTRY_ORIGINAL_NUM_OUTPUTS; j++) {
          indsp->produced_cargo[j] = GetCargoTranslation(buf.ReadByte(), _cur_gps.grffile);
          indsp->produced_cargo_label[j] = CT_INVALID;
        }
        break;
 
      case 0x11: // Acceptance cargo types
        for (uint8_t j = 0; j < INDUSTRY_ORIGINAL_NUM_INPUTS; j++) {
          indsp->accepts_cargo[j] = GetCargoTranslation(buf.ReadByte(), _cur_gps.grffile);
          indsp->accepts_cargo_label[j] = CT_INVALID;
        }
        buf.ReadByte(); // Unnused, eat it up
        break;
 
      case 0x12: // Production multipliers
      case 0x13:
        indsp->production_rate[prop - 0x12] = buf.ReadByte();
        break;
 
      case 0x14: // Minimal amount of cargo distributed
        indsp->minimal_cargo = buf.ReadByte();
        break;
 
      case 0x15: { // Random sound effects
        uint8_t num_sounds = buf.ReadByte();
 
        std::vector<uint8_t> sounds;
        sounds.reserve(num_sounds);
        for (uint8_t j = 0; j < num_sounds; ++j) {
          sounds.push_back(buf.ReadByte());
        }
 
        indsp->random_sounds = std::move(sounds);
        break;
      }
 
      case 0x16: // Conflicting industry types
        for (uint8_t j = 0; j < 3; j++) indsp->conflicting[j] = buf.ReadByte();
        break;
 
      case 0x17: // Probability in random game
        indsp->appear_creation[to_underlying(_settings_game.game_creation.landscape)] = buf.ReadByte();
        break;
 
      case 0x18: // Probability during gameplay
        indsp->appear_ingame[to_underlying(_settings_game.game_creation.landscape)] = buf.ReadByte();
        break;
 
      case 0x19: // Map colour
        indsp->map_colour = PixelColour{buf.ReadByte()};
        break;
 
      case 0x1A: // Special industry flags to define special behavior
        indsp->behaviour = IndustryBehaviours{buf.ReadDWord()};
        break;
 
      case 0x1B: // New industry text ID
        AddStringForMapping(GRFStringID{buf.ReadWord()}, &indsp->new_industry_text);
        break;
 
      case 0x1C: // Input cargo multipliers for the three input cargo types
      case 0x1D:
      case 0x1E: {
          uint32_t multiples = buf.ReadDWord();
          indsp->input_cargo_multiplier[prop - 0x1C][0] = GB(multiples, 0, 16);
          indsp->input_cargo_multiplier[prop - 0x1C][1] = GB(multiples, 16, 16);
          break;
        }
 
      case 0x1F: // Industry name
        AddStringForMapping(GRFStringID{buf.ReadWord()}, &indsp->name);
        break;
 
      case 0x20: // Prospecting success chance
        indsp->prospecting_chance = buf.ReadDWord();
        break;
 
      case 0x21:   // Callback mask
      case 0x22: { // Callback additional mask
        auto mask = indsp->callback_mask.base();
        SB(mask, (prop - 0x21) * 8, 8, buf.ReadByte());
        indsp->callback_mask = IndustryCallbackMasks{mask};
        break;
      }
 
      case 0x23: // removal cost multiplier
        indsp->removal_cost_multiplier = buf.ReadDWord();
        break;
 
      case 0x24: { // name for nearby station
        GRFStringID str{buf.ReadWord()};
        if (str == 0) {
          indsp->station_name = STR_NULL;
        } else {
          AddStringForMapping(str, &indsp->station_name);
        }
        break;
      }
 
      case 0x25: { // variable length produced cargoes
        uint8_t num_cargoes = buf.ReadByte();
        if (num_cargoes > std::size(indsp->produced_cargo)) {
          GRFError *error = DisableGrf(STR_NEWGRF_ERROR_LIST_PROPERTY_TOO_LONG);
          error->param_value[1] = prop;
          return CIR_DISABLED;
        }
        for (size_t i = 0; i < std::size(indsp->produced_cargo); i++) {
          if (i < num_cargoes) {
            CargoType cargo = GetCargoTranslation(buf.ReadByte(), _cur_gps.grffile);
            indsp->produced_cargo[i] = cargo;
          } else {
            indsp->produced_cargo[i] = INVALID_CARGO;
          }
          if (i < std::size(indsp->produced_cargo_label)) indsp->produced_cargo_label[i] = CT_INVALID;
        }
        break;
      }
 
      case 0x26: { // variable length accepted cargoes
        uint8_t num_cargoes = buf.ReadByte();
        if (num_cargoes > std::size(indsp->accepts_cargo)) {
          GRFError *error = DisableGrf(STR_NEWGRF_ERROR_LIST_PROPERTY_TOO_LONG);
          error->param_value[1] = prop;
          return CIR_DISABLED;
        }
        for (size_t i = 0; i < std::size(indsp->accepts_cargo); i++) {
          if (i < num_cargoes) {
            CargoType cargo = GetCargoTranslation(buf.ReadByte(), _cur_gps.grffile);
            indsp->accepts_cargo[i] = cargo;
          } else {
            indsp->accepts_cargo[i] = INVALID_CARGO;
          }
          if (i < std::size(indsp->accepts_cargo_label)) indsp->accepts_cargo_label[i] = CT_INVALID;
        }
        break;
      }
 
      case 0x27: { // variable length production rates
        uint8_t num_cargoes = buf.ReadByte();
        if (num_cargoes > lengthof(indsp->production_rate)) {
          GRFError *error = DisableGrf(STR_NEWGRF_ERROR_LIST_PROPERTY_TOO_LONG);
          error->param_value[1] = prop;
          return CIR_DISABLED;
        }
        for (uint i = 0; i < lengthof(indsp->production_rate); i++) {
          if (i < num_cargoes) {
            indsp->production_rate[i] = buf.ReadByte();
          } else {
            indsp->production_rate[i] = 0;
          }
        }
        break;
      }
 
      case 0x28: { // variable size input/output production multiplier table
        uint8_t num_inputs = buf.ReadByte();
        uint8_t num_outputs = buf.ReadByte();
        if (num_inputs > std::size(indsp->accepts_cargo) || num_outputs > std::size(indsp->produced_cargo)) {
          GRFError *error = DisableGrf(STR_NEWGRF_ERROR_LIST_PROPERTY_TOO_LONG);
          error->param_value[1] = prop;
          return CIR_DISABLED;
        }
        for (size_t i = 0; i < std::size(indsp->accepts_cargo); i++) {
          for (size_t j = 0; j < std::size(indsp->produced_cargo); j++) {
            uint16_t mult = 0;
            if (i < num_inputs && j < num_outputs) mult = buf.ReadWord();
            indsp->input_cargo_multiplier[i][j] = mult;
          }
        }
        break;
      }
 
      case 0x29: // Badge list
        indsp->badges = ReadBadgeList(buf, GSF_INDUSTRIES);
        break;
 
      default:
        ret = CIR_UNKNOWN;
        break;
    }
  }
 
  return ret;
}
 
template <> ChangeInfoResult GrfChangeInfoHandler<GSF_INDUSTRYTILES>::Reserve(uint, uint, int, ByteReader &) { return CIR_UNHANDLED; }
template <> ChangeInfoResult GrfChangeInfoHandler<GSF_INDUSTRYTILES>::Activation(uint first, uint last, int prop, ByteReader &buf) { return IndustrytilesChangeInfo(first, last, prop, buf); }
 
template <> ChangeInfoResult GrfChangeInfoHandler<GSF_INDUSTRIES>::Reserve(uint, uint, int, ByteReader &) { return CIR_UNHANDLED; }
template <> ChangeInfoResult GrfChangeInfoHandler<GSF_INDUSTRIES>::Activation(uint first, uint last, int prop, ByteReader &buf) { return IndustriesChangeInfo(first, last, prop, buf); }