ref: 9d7126c11b5f1577b00987b8d5f0f7f761b012d7
dir: /src/w_merge.c/
// Emacs style mode select -*- C++ -*- //----------------------------------------------------------------------------- // // Copyright(C) 2005 Simon Howard // // This program 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; either version 2 // of the License, or (at your option) any later version. // // This program 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 this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA // 02111-1307, USA. // // DESCRIPTION: // Handles merging of PWADs, similar to deutex's -merge option // // Ideally this should work exactly the same as in deutex, but trying to // read the deutex source code made my brain hurt. // //----------------------------------------------------------------------------- #include <stdlib.h> #include <string.h> #include "i_system.h" #include "w_merge.h" #include "w_wad.h" #include "z_zone.h" typedef enum { SECTION_NORMAL, SECTION_FLATS, SECTION_SPRITES, } section_t; typedef struct { lumpinfo_t *lumps; int numlumps; } searchlist_t; typedef struct { char sprname[4]; char frame; lumpinfo_t *angle_lumps[8]; } sprite_frame_t; static searchlist_t iwad; static searchlist_t iwad_sprites; static searchlist_t pwad; static searchlist_t iwad_flats; static searchlist_t pwad_sprites; static searchlist_t pwad_flats; // lumps with these sprites must be replaced in the IWAD static sprite_frame_t *sprite_frames; static int num_sprite_frames; static int sprite_frames_alloced; // Search in a list to find a lump with a particular name // Linear search (slow!) // // Returns -1 if not found static int FindInList(searchlist_t *list, char *name) { int i; for (i=0; i<list->numlumps; ++i) { if (!strncasecmp(list->lumps[i].name, name, 8)) return i; } return -1; } static boolean SetupList(searchlist_t *list, searchlist_t *src_list, char *startname, char *endname, char *startname2, char *endname2) { int startlump, endlump; list->numlumps = 0; startlump = FindInList(src_list, startname); if (startname2 != NULL && startlump < 0) { startlump = FindInList(src_list, startname2); } if (startlump >= 0) { endlump = FindInList(src_list, endname); if (endname2 != NULL && endlump < 0) { endlump = FindInList(src_list, endname2); } if (endlump > startlump) { list->lumps = src_list->lumps + startlump + 1; list->numlumps = endlump - startlump - 1; return true; } } return false; } // Sets up the sprite/flat search lists static void SetupLists(void) { // IWAD if (!SetupList(&iwad_flats, &iwad, "F_START", "F_END", NULL, NULL)) { I_Error("Flats section not found in IWAD"); } if (!SetupList(&iwad_sprites, &iwad, "S_START", "S_END", NULL, NULL)) { I_Error("Sprites section not found in IWAD"); } // PWAD SetupList(&pwad_flats, &pwad, "F_START", "F_END", "FF_START", "FF_END"); SetupList(&pwad_sprites, &pwad, "S_START", "S_END", "SS_START", "SS_END"); } // Initialise the replace list static void InitSpriteList(void) { if (sprite_frames == NULL) { sprite_frames_alloced = 128; sprite_frames = Z_Malloc(sizeof(*sprite_frames) * sprite_frames_alloced, PU_STATIC, NULL); } num_sprite_frames = 0; } // Find a sprite frame static sprite_frame_t *FindSpriteFrame(char *name, int frame) { sprite_frame_t *result; int i; // Search the list and try to find the frame for (i=0; i<num_sprite_frames; ++i) { sprite_frame_t *cur = &sprite_frames[i]; if (!strncasecmp(cur->sprname, name, 4) && cur->frame == frame) { return cur; } } // Not found in list; Need to add to the list // Grow list? if (num_sprite_frames >= sprite_frames_alloced) { sprite_frame_t *newframes; newframes = Z_Malloc(sprite_frames_alloced * 2 * sizeof(*sprite_frames), PU_STATIC, NULL); memcpy(newframes, sprite_frames, sprite_frames_alloced * sizeof(*sprite_frames)); Z_Free(sprite_frames); sprite_frames_alloced *= 2; sprite_frames = newframes; } // Add to end of list result = &sprite_frames[num_sprite_frames]; strncpy(result->sprname, name, 4); result->frame = frame; for (i=0; i<8; ++i) result->angle_lumps[i] = NULL; ++num_sprite_frames; return result; } // Check if sprite lump is needed in the new wad static boolean SpriteLumpNeeded(lumpinfo_t *lump) { sprite_frame_t *sprite; int angle_num; int i; // check the first frame sprite = FindSpriteFrame(lump->name, lump->name[4]); angle_num = lump->name[5] - '0'; if (angle_num == 0) { // must check all frames for (i=0; i<8; ++i) { if (sprite->angle_lumps[i] == lump) return true; } } else { // check if this lump is being used for this frame if (sprite->angle_lumps[angle_num - 1] == lump) return true; } // second frame if any // no second frame? if (lump->name[6] == '\0') return false; sprite = FindSpriteFrame(lump->name, lump->name[6]); angle_num = lump->name[7] - '0'; if (angle_num == 0) { // must check all frames for (i=0; i<8; ++i) { if (sprite->angle_lumps[i] == lump) return true; } } else { // check if this lump is being used for this frame if (sprite->angle_lumps[angle_num - 1] == lump) return true; } return false; } static void AddSpriteLump(lumpinfo_t *lump) { sprite_frame_t *sprite; int angle_num; int i; // first angle sprite = FindSpriteFrame(lump->name, lump->name[4]); angle_num = lump->name[5] - '0'; if (angle_num == 0) { for (i=0; i<8; ++i) sprite->angle_lumps[i] = lump; } else { sprite->angle_lumps[angle_num - 1] = lump; } // second angle // no second angle? if (lump->name[6] == '\0') return; sprite = FindSpriteFrame(lump->name, lump->name[6]); angle_num = lump->name[7] - '0'; if (angle_num == 0) { for (i=0; i<8; ++i) sprite->angle_lumps[i] = lump; } else { sprite->angle_lumps[angle_num - 1] = lump; } } // Generate the list. Run at the start, before merging static void GenerateSpriteList(void) { int i; InitSpriteList(); // Add all sprites from the IWAD for (i=0; i<iwad_sprites.numlumps; ++i) { AddSpriteLump(&iwad_sprites.lumps[i]); } // Add all sprites from the PWAD // (replaces IWAD sprites) for (i=0; i<pwad_sprites.numlumps; ++i) { AddSpriteLump(&pwad_sprites.lumps[i]); } } // Perform the merge. // // The merge code creates a new lumpinfo list, adding entries from the // IWAD first followed by the PWAD. // // For the IWAD: // * Flats are added. If a flat with the same name is in the PWAD, // it is ignored(deleted). At the end of the section, all flats in the // PWAD are inserted. This is consistent with the behavior of // deutex/deusf. // * Sprites are added. The "replace list" is generated before the merge // from the list of sprites in the PWAD. Any sprites in the IWAD found // to match the replace list are removed. At the end of the section, // the sprites from the PWAD are inserted. // // For the PWAD: // * All Sprites and Flats are ignored, with the assumption they have // already been merged into the IWAD's sections. static void DoMerge(void) { section_t current_section; lumpinfo_t *newlumps; int num_newlumps; int lumpindex; int i, n; // Can't ever have more lumps than we already have newlumps = malloc(sizeof(lumpinfo_t) * numlumps); num_newlumps = 0; // Add IWAD lumps current_section = SECTION_NORMAL; for (i=0; i<iwad.numlumps; ++i) { lumpinfo_t *lump = &iwad.lumps[i]; switch (current_section) { case SECTION_NORMAL: if (!strncasecmp(lump->name, "F_START", 8)) { current_section = SECTION_FLATS; } else if (!strncasecmp(lump->name, "S_START", 8)) { current_section = SECTION_SPRITES; } newlumps[num_newlumps++] = *lump; break; case SECTION_FLATS: // Have we reached the end of the section? if (!strncasecmp(lump->name, "F_END", 8)) { // Add all new flats from the PWAD to the end // of the section for (n=0; n<pwad_flats.numlumps; ++n) { newlumps[num_newlumps++] = pwad_flats.lumps[n]; } newlumps[num_newlumps++] = *lump; // back to normal reading current_section = SECTION_NORMAL; } else { // If there is a flat in the PWAD with the same name, // do not add it now. All PWAD flats are added to the // end of the section. Otherwise, if it is only in the // IWAD, add it now lumpindex = FindInList(&pwad_flats, lump->name); if (lumpindex < 0) { newlumps[num_newlumps++] = *lump; } } break; case SECTION_SPRITES: // Have we reached the end of the section? if (!strncasecmp(lump->name, "S_END", 8)) { // add all the pwad sprites for (n=0; n<pwad_sprites.numlumps; ++n) { if (SpriteLumpNeeded(&pwad_sprites.lumps[n])) { newlumps[num_newlumps++] = pwad_sprites.lumps[n]; } } // copy the ending newlumps[num_newlumps++] = *lump; // back to normal reading current_section = SECTION_NORMAL; } else { // Is this lump holding a sprite to be replaced in the // PWAD? If so, wait until the end to add it. if (SpriteLumpNeeded(lump)) { newlumps[num_newlumps++] = *lump; } } break; } } // Add PWAD lumps current_section = SECTION_NORMAL; for (i=0; i<pwad.numlumps; ++i) { lumpinfo_t *lump = &pwad.lumps[i]; switch (current_section) { case SECTION_NORMAL: if (!strncasecmp(lump->name, "F_START", 8) || !strncasecmp(lump->name, "FF_START", 8)) { current_section = SECTION_FLATS; } else if (!strncasecmp(lump->name, "S_START", 8) || !strncasecmp(lump->name, "SS_START", 8)) { current_section = SECTION_SPRITES; } else { // Don't include the headers of sections newlumps[num_newlumps++] = *lump; } break; case SECTION_FLATS: // PWAD flats are ignored (already merged) if (!strncasecmp(lump->name, "FF_END", 8) || !strncasecmp(lump->name, "F_END", 8)) { // end of section current_section = SECTION_NORMAL; } break; case SECTION_SPRITES: // PWAD sprites are ignored (already merged) if (!strncasecmp(lump->name, "SS_END", 8) || !strncasecmp(lump->name, "S_END", 8)) { // end of section current_section = SECTION_NORMAL; } break; } } // Switch to the new lumpinfo, and free the old one free(lumpinfo); lumpinfo = newlumps; numlumps = num_newlumps; } void W_PrintDirectory(void) { unsigned int i, n; // debug for (i=0; i<numlumps; ++i) { for (n=0; n<8 && lumpinfo[i].name[n] != '\0'; ++n) putchar(lumpinfo[i].name[n]); putchar('\n'); } } // Merge in a file by name void W_MergeFile(char *filename) { int old_numlumps; old_numlumps = numlumps; // Load PWAD if (W_AddFile(filename) == NULL) return; // iwad is at the start, pwad was appended to the end iwad.lumps = lumpinfo; iwad.numlumps = old_numlumps; pwad.lumps = lumpinfo + old_numlumps; pwad.numlumps = numlumps - old_numlumps; // Setup sprite/flat lists SetupLists(); // Generate list of sprites to be replaced by the PWAD GenerateSpriteList(); // Perform the merge DoMerge(); } // Replace lumps in the given list with lumps from the PWAD static void W_NWTAddLumps(searchlist_t *list) { int i; // Go through the IWAD list given, replacing lumps with lumps of // the same name from the PWAD for (i=0; i<list->numlumps; ++i) { int index; index = FindInList(&pwad, list->lumps[i].name); if (index > 0) { memcpy(&list->lumps[i], &pwad.lumps[index], sizeof(lumpinfo_t)); } } } // Merge sprites and flats in the way NWT does with its -af and -as // command-line options. void W_NWTMergeFile(char *filename, int flags) { int old_numlumps; old_numlumps = numlumps; // Load PWAD if (W_AddFile(filename) == NULL) return; // iwad is at the start, pwad was appended to the end iwad.lumps = lumpinfo; iwad.numlumps = old_numlumps; pwad.lumps = lumpinfo + old_numlumps; pwad.numlumps = numlumps - old_numlumps; // Setup sprite/flat lists SetupLists(); // Merge in flats? if (flags & W_NWT_MERGE_FLATS) { W_NWTAddLumps(&iwad_flats); } // Sprites? if (flags & W_NWT_MERGE_SPRITES) { W_NWTAddLumps(&iwad_sprites); } // Discard the PWAD numlumps = old_numlumps; } // Simulates the NWT -merge command line parameter. What this does is load // a PWAD, then search the IWAD sprites, removing any sprite lumps that also // exist in the PWAD. void W_NWTDashMerge(char *filename) { FILE *handle; int old_numlumps; int i; old_numlumps = numlumps; // Load PWAD handle = W_AddFile(filename); if (handle == NULL) return; // iwad is at the start, pwad was appended to the end iwad.lumps = lumpinfo; iwad.numlumps = old_numlumps; pwad.lumps = lumpinfo + old_numlumps; pwad.numlumps = numlumps - old_numlumps; // Setup sprite/flat lists SetupLists(); // Search through the IWAD sprites list. for (i=0; i<iwad_sprites.numlumps; ++i) { if (FindInList(&pwad, iwad_sprites.lumps[i].name) >= 0) { // Replace this entry with an empty string. This is what // nwt -merge does. strcpy(iwad_sprites.lumps[i].name, ""); } } // Discard PWAD // The PWAD must now be added in again with -file. numlumps = old_numlumps; fclose(handle); }