src/kos32/files.c

   1 /* Copyright (C) 1996-1997 Aleksey Volynskov
   2  * Copyright (C) 2011 Rambo
   3  * Copyright (C) 2020 SovietPony
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, version 3 of the License ONLY.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "glob.h"
  19 #include <stdio.h>
  20 #include <string.h>
  21 #include <stdlib.h>
  22 #include <assert.h>
  23 #include "files.h"
  24 #include "error.h"
  25
  26 #include "map.h" // MAP_load
  27 #include "save.h" // SAVE_getname
  28
  29 #include "kos32/streams.h"
  30 #include "common/streams.h"
  31 #include "common/wadres.h"
  32 #include "common/cp866.h"
  33
  34 int d_start, d_end;
  35
  36 char savname[SAVE_MAX][SAVE_MAXLEN];
  37 char savok[SAVE_MAX];
  38
  39 static int m_start, m_end;
  40 static int s_start, s_end;
  41
  42 void F_addwad (const char *fn) {
  43   static int i = 0;
  44   static KOS32_Stream wadh[MAX_WADS];
  45   if (i < MAX_WADS) {
  46     if (KOS32_Open(&wadh[i], fn)) {
  47       if (WADRES_addwad(&wadh[i].base)) {
  48         i += 1;
  49       } else {
  50         ERR_failinit("Invalid WAD %s", fn);
  51       }
  52     } else {
  53       ERR_failinit("Unable to add WAD %s", fn);
  54     }
  55   } else {
  56     ERR_failinit("Too many wads");
  57   }
  58 }
  59
  60 void F_initwads (void) {
  61   if (!WADRES_rehash()) {
  62     ERR_failinit("F_initwads: failed rehash");
  63   }
  64   d_start = F_getresid("D_START");
  65   d_end = F_getresid("D_END");
  66   m_start = F_getresid("M_START");
  67   m_end = F_getresid("M_END");
  68   s_start = F_getresid("S_START");
  69   s_end = F_getresid("S_END");
  70 }
  71
  72 int F_findres (const char n[8]) {
  73   return WADRES_find(n);
  74 }
  75
  76 int F_getresid (const char n[8]) {
  77   int i = F_findres(n);
  78   if (i == -1) {
  79     ERR_fatal("F_getresid: resource %.8s not found", n);
  80   }
  81   return i;
  82 }
  83
  84 void F_getresname (char n[8], int r) {
  85   WADRES_getname(r, n);
  86 }
  87
  88 int F_getsprid (const char n[4], int s, int d, char *dir) {
  89   s += 'A';
  90   d += '0';
  91   for (int i = s_start + 1; i < s_end; i++) {
  92     char wn[8];
  93     byte a, b;
  94     WADRES_getname(i, wn);
  95     if (cp866_strncasecmp(wn, n, 4) == 0 && (wn[4] == s || wn[6] == s)) {
  96       a = wn[4] == s ? wn[5] : 0;
  97       b = wn[6] == s ? wn[7] : 0;
  98       if (a == '0' || b == '0' || a == d || b == d) {
  99         if (dir != NULL) {
 100           *dir = (a != '0' && b == '0') || (a != d && b == d);
 101         }
 102         return i;
 103       }
 104     }
 105   }
 106   ERR_fatal("F_getsprid: image %.4s%c%c not found", n, s, d);
 107   return -1;
 108 }
 109
 110 int F_getreslen (int r) {
 111   return WADRES_getsize(r);
 112 }
 113
 114 /*
 115 void F_nextmus (char *s) {
 116   int i = F_findres(s);
 117   if (i <= m_start || i >= m_end) {
 118     i = m_start;
 119   }
 120   for (++i; ; ++i) {
 121     if (i >= m_end) {
 122       i = m_start + 1;
 123     }
 124     WADRES_getname(i, s);
 125     if (cp866_strcasecmp(s, "MENU") == 0 ||
 126         cp866_strcasecmp(s, "INTERMUS") == 0 ||
 127         cp866_strcasecmp(s, "\x8a\x8e\x8d\x85\x96\x0") == 0) {
 128       continue;
 129     }
 130     if (cp866_strncasecmp(s, "DMI", 3) != 0) {
 131       break;
 132     }
 133   }
 134 }
 135
 136 void F_randmus (char *s) {
 137   int i;
 138   int n = myrand(10);
 139   for (i = 0; i < n; i++) {
 140     F_nextmus(s);
 141   }
 142 }
 143 */
 144
 145 void F_loadmap (char n[8]) {
 146   int id = F_getresid(n);
 147   if (id != -1) {
 148     Stream *r = WADRES_getbasereader(id);
 149     long offset = WADRES_getoffset(id);
 150     stream_setpos(r, offset);
 151     if (!MAP_load(r)) {
 152       ERR_fatal("Failed to load map");
 153     }
 154   } else {
 155     ERR_fatal("Failed to load map: resource %.8s not found", n);
 156   }
 157 }
 158
 159 static char *getsavfpname (int n, int ro) {
 160   static char fn[] = "savgame0.dat";
 161   static char p[100];
 162   fn[7] = n + '0';
 163   strcpy(p, fn);
 164   return p;
 165 }
 166
 167 void F_getsavnames (void) {
 168   KOS32_Stream rd;
 169   for (int i = 0; i < SAVE_MAX; ++i) {
 170     savok[i] = 0;
 171     char *p = getsavfpname(i, 1);
 172     if (KOS32_Open(&rd, p)) {
 173       savok[i] = SAVE_getname(&rd.base, savname[i]);
 174       KOS32_Close(&rd);
 175     }
 176     if (!savok[i]) {
 177       memset(savname[i], 0, 24);
 178     } else {
 179       savname[i][23] = 0;
 180     }
 181   }
 182 }
 183
 184 void F_loadgame (int n) {
 185   KOS32_Stream rd;
 186   char *p = getsavfpname(n, 1);
 187   if (KOS32_Open(&rd, p)) {
 188     SAVE_load(&rd.base);
 189     KOS32_Close(&rd);
 190   }
 191 }
 192
 193 void F_savegame (int n, char *s) {
 194   KOS32_Stream wr;
 195   char *p = getsavfpname(n, 0);
 196   if (KOS32_Create(&wr, p)) {
 197     SAVE_save(&wr.base, s);
 198     KOS32_Close(&wr);
 199   }
 200 }