src/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 #ifdef UNIX
  30 #  include <sys/stat.h>
  31 #endif
  32
  33 #include "common/streams.h"
  34 #include "common/files.h"
  35 #include "common/wadres.h"
  36 #include "common/cp866.h"
  37
  38 int d_start, d_end;
  39
  40 char savname[SAVE_MAX][SAVE_MAXLEN];
  41 char savok[SAVE_MAX];
  42
  43 static int m_start, m_end;
  44 static int s_start, s_end;
  45
  46 void F_startup (void) {
  47   logo("F_startup: setup file system\n");
  48 }
  49
  50 void F_addwad (const char *fn) {
  51   static int i = 0;
  52   static FILE_Stream wadh[MAX_WADS];
  53   if (i < MAX_WADS) {
  54     if (FILE_Open(&wadh[i], fn, "rb")) {
  55       if (WADRES_addwad(&wadh[i].base)) {
  56         i += 1;
  57       } else {
  58         ERR_failinit("Invalid WAD %s", fn);
  59       }
  60     } else {
  61       ERR_failinit("Unable to add WAD %s", fn);
  62     }
  63   } else {
  64     ERR_failinit("Too many wads");
  65   }
  66 }
  67
  68 void F_initwads (void) {
  69   if (!WADRES_rehash()) {
  70     ERR_failinit("F_initwads: failed rehash");
  71   }
  72 }
  73
  74 void F_allocres (void) {
  75   d_start = F_getresid("D_START");
  76   d_end = F_getresid("D_END");
  77   m_start = F_getresid("M_START");
  78   m_end = F_getresid("M_END");
  79   s_start = F_getresid("S_START");
  80   s_end = F_getresid("S_END");
  81 }
  82
  83 void F_loadres (int r, void *p) {
  84   WADRES_getdata(r, p);
  85 }
  86
  87 int F_findres (const char n[8]) {
  88   return WADRES_find(n);
  89 }
  90
  91 int F_getresid (const char n[8]) {
  92   int i = F_findres(n);
  93   if (i == -1) {
  94     ERR_fatal("F_getresid: resource %.8s not found", n);
  95   }
  96   return i;
  97 }
  98
  99 void F_getresname (char n[8], int r) {
 100   WADRES_getname(r, n);
 101 }
 102
 103 int F_getsprid (const char n[4], int s, int d, char *dir) {
 104   s += 'A';
 105   d += '0';
 106   for (int i = s_start + 1; i < s_end; i++) {
 107     char wn[8];
 108     byte a, b;
 109     WADRES_getname(i, wn);
 110     if (cp866_strncasecmp(wn, n, 4) == 0 && (wn[4] == s || wn[6] == s)) {
 111       a = wn[4] == s ? wn[5] : 0;
 112       b = wn[6] == s ? wn[7] : 0;
 113       if (a == '0' || b == '0' || a == d || b == d) {
 114         if (dir != NULL) {
 115           *dir = (a != '0' && b == '0') || (a != d && b == d);
 116         }
 117         return i;
 118       }
 119     }
 120   }
 121   ERR_fatal("F_getsprid: image %.4s%c%c not found", n, s, d);
 122   return -1;
 123 }
 124
 125 int F_getreslen (int r) {
 126   return WADRES_getsize(r);
 127 }
 128
 129 void F_nextmus (char *s) {
 130   int i = F_findres(s);
 131   if (i <= m_start || i >= m_end) {
 132     i = m_start;
 133   }
 134   for (++i; ; ++i) {
 135     if (i >= m_end) {
 136       i = m_start + 1;
 137     }
 138     WADRES_getname(i, s);
 139     if (cp866_strcasecmp(s, "MENU") == 0 ||
 140         cp866_strcasecmp(s, "INTERMUS") == 0 ||
 141         cp866_strcasecmp(s, "\x8a\x8e\x8d\x85\x96\x0") == 0) {
 142       continue;
 143     }
 144     if (cp866_strncasecmp(s, "DMI", 3) != 0) {
 145       break;
 146     }
 147   }
 148 }
 149
 150 void F_randmus (char *s) {
 151   int i;
 152   int n = myrand(10);
 153   for (i = 0; i < n; i++) {
 154     F_nextmus(s);
 155   }
 156 }
 157
 158 void F_loadmap (char n[8]) {
 159   int id = F_getresid(n);
 160   if (id != -1) {
 161     Stream *r = WADRES_getbasereader(id);
 162     long offset = WADRES_getoffset(id);
 163     stream_setpos(r, offset);
 164     if (!MAP_load(r)) {
 165       ERR_fatal("Failed to load map");
 166     }
 167   } else {
 168     ERR_fatal("Failed to load map: resource %.8s not found", n);
 169   }
 170 }
 171
 172 static char *getsavfpname (int n, int ro) {
 173   static char fn[] = "savgame0.dat";
 174   static char p[100];
 175   fn[7] = n + '0';
 176 #ifdef UNIX
 177   char *e = getenv("HOME");
 178   strncpy(p, e, 60);
 179   strcat(p, "/.flatwaifu");
 180   if (!ro) {
 181     mkdir(p, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
 182   }
 183   strcat(p, "/");
 184   strcat(p, fn);
 185 #else
 186   strcpy(p, fn);
 187 #endif
 188   return p;
 189 }
 190
 191 void F_getsavnames (void) {
 192   FILE_Stream rd;
 193   for (int i = 0; i < SAVE_MAX; ++i) {
 194     savok[i] = 0;
 195     char *p = getsavfpname(i, 1);
 196     if (FILE_Open(&rd, p, "rb")) {
 197       savok[i] = SAVE_getname(&rd.base, savname[i]);
 198       FILE_Close(&rd);
 199     }
 200     if (!savok[i]) {
 201       memset(savname[i], 0, 24);
 202     } else {
 203       savname[i][23] = 0;
 204     }
 205   }
 206 }
 207
 208 void F_loadgame (int n) {
 209   FILE_Stream rd;
 210   char *p = getsavfpname(n, 1);
 211   if (FILE_Open(&rd, p, "rb")) {
 212     SAVE_load(&rd.base);
 213     FILE_Close(&rd);
 214   }
 215 }
 216
 217 void F_savegame (int n, char *s) {
 218   FILE_Stream wr;
 219   char *p = getsavfpname(n, 0);
 220   if (FILE_Open(&wr, p, "wb")) {
 221     SAVE_save(&wr.base, s);
 222     FILE_Close(&wr);
 223   }
 224 }