# base_media_func.h

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    00001 /* $Id: base_media_func.h 19132 2010-02-14 16:31:35Z alberth $ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * 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.
    00006  * 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.
    00007  * 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 <http://www.gnu.org/licenses/>.
    00008  */
    00009
    00012 #include "base_media_base.h"
    00013 #include "debug.h"
    00014 #include "ini_type.h"
    00015 #include "string_func.h"
    00016
    00017 template <class Tbase_set> /* static */ const char *BaseMedia<Tbase_set>::ini_set;
    00018 template <class Tbase_set> /* static */ const Tbase_set *BaseMedia<Tbase_set>::used_set;
    00019 template <class Tbase_set> /* static */ Tbase_set *BaseMedia<Tbase_set>::available_sets;
    00020
    00025 #define fetch_metadata(name) \
    00026   item = metadata->GetItem(name, false); \
    00027   if (item == NULL || StrEmpty(item->value)) { \
    00028     DEBUG(grf, 0, "Base " SET_TYPE "set detail loading: %s field missing", name); \
    00029     return false; \
    00030   }
    00031
    00032 template <class T, size_t Tnum_files, Subdirectory Tsubdir>
    00033 bool BaseSet<T, Tnum_files, Tsubdir>::FillSetDetails(IniFile *ini, const char *path)
    00034 {
    00035   memset(this, 0, sizeof(*this));
    00036
    00037   IniGroup *metadata = ini->GetGroup("metadata");
    00038   IniItem *item;
    00039
    00040   fetch_metadata("name");
    00041   this->name = strdup(item->value);
    00042
    00043   fetch_metadata("description");
    00044   this->description[strdup("")] = strdup(item->value);
    00045
    00046   /* Add the translations of the descriptions too. */
    00047   for (const IniItem *item = metadata->item; item != NULL; item = item->next) {
    00048     if (strncmp("description.", item->name, 12) != 0) continue;
    00049
    00050     this->description[strdup(item->name + 12)] = strdup(item->value);
    00051   }
    00052
    00053   fetch_metadata("shortname");
    00054   for (uint i = 0; item->value[i] != '\0' && i < 4; i++) {
    00055     this->shortname |= ((uint8)item->value[i]) << (i * 8);
    00056   }
    00057
    00058   fetch_metadata("version");
    00059   this->version = atoi(item->value);
    00060
    00061   /* For each of the file types we want to find the file, MD5 checksums and warning messages. */
    00062   IniGroup *files  = ini->GetGroup("files");
    00063   IniGroup *md5s   = ini->GetGroup("md5s");
    00064   IniGroup *origin = ini->GetGroup("origin");
    00065   for (uint i = 0; i < Tnum_files; i++) {
    00066     MD5File *file = &this->files[i];
    00067     /* Find the filename first. */
    00068     item = files->GetItem(BaseSet<T, Tnum_files, Tsubdir>::file_names[i], false);
    00069     if (item == NULL) {
    00070       DEBUG(grf, 0, "No " SET_TYPE " file for: %s", BaseSet<T, Tnum_files, Tsubdir>::file_names[i]);
    00071       return false;
    00072     }
    00073
    00074     const char *filename = item->value;
    00075     if (filename == NULL) {
    00076       file->filename = NULL;
    00077       /* If we list no file, that file must be valid */
    00078       this->valid_files++;
    00079       this->found_files++;
    00080       continue;
    00081     }
    00082
    00083     file->filename = str_fmt("%s%s", path, filename);
    00084
    00085     /* Then find the MD5 checksum */
    00086     item = md5s->GetItem(filename, false);
    00087     if (item == NULL) {
    00088       DEBUG(grf, 0, "No MD5 checksum specified for: %s", filename);
    00089       return false;
    00090     }
    00091     char *c = item->value;
    00092     for (uint i = 0; i < sizeof(file->hash) * 2; i++, c++) {
    00093       uint j;
    00094       if ('0' <= *c && *c <= '9') {
    00095         j = *c - '0';
    00096       } else if ('a' <= *c && *c <= 'f') {
    00097         j = *c - 'a' + 10;
    00098       } else if ('A' <= *c && *c <= 'F') {
    00099         j = *c - 'A' + 10;
    00100       } else {
    00101         DEBUG(grf, 0, "Malformed MD5 checksum specified for: %s", filename);
    00102         return false;
    00103       }
    00104       if (i % 2 == 0) {
    00105         file->hash[i / 2] = j << 4;
    00106       } else {
    00107         file->hash[i / 2] |= j;
    00108       }
    00109     }
    00110
    00111     /* Then find the warning message when the file's missing */
    00112     item = filename == NULL ? NULL : origin->GetItem(filename, false);
    00113     if (item == NULL) item = origin->GetItem("default", false);
    00114     if (item == NULL) {
    00115       DEBUG(grf, 1, "No origin warning message specified for: %s", filename);
    00116       file->missing_warning = strdup("");
    00117     } else {
    00118       file->missing_warning = strdup(item->value);
    00119     }
    00120
    00121     switch (file->CheckMD5(Tsubdir)) {
    00122       case MD5File::CR_MATCH:
    00123         this->valid_files++;
    00124         /* FALL THROUGH */
    00125       case MD5File::CR_MISMATCH:
    00126         this->found_files++;
    00127         break;
    00128
    00129       case MD5File::CR_NO_FILE:
    00130         break;
    00131     }
    00132   }
    00133
    00134   return true;
    00135 }
    00136
    00137 template <class Tbase_set>
    00138 bool BaseMedia<Tbase_set>::AddFile(const char *filename, size_t basepath_length)
    00139 {
    00140   bool ret = false;
    00141   DEBUG(grf, 1, "Checking %s for base " SET_TYPE " set", filename);
    00142
    00143   Tbase_set *set = new Tbase_set();
    00144   IniFile *ini = new IniFile();
    00145   ini->LoadFromDisk(filename);
    00146
    00147   char *path = strdup(filename + basepath_length);
    00148   char *psep = strrchr(path, PATHSEPCHAR);
    00149   if (psep != NULL) {
    00150     psep[1] = '\0';
    00151   } else {
    00152     *path = '\0';
    00153   }
    00154
    00155   if (set->FillSetDetails(ini, path)) {
    00156     Tbase_set *duplicate = NULL;
    00157     for (Tbase_set *c = BaseMedia<Tbase_set>::available_sets; c != NULL; c = c->next) {
    00158       if (strcmp(c->name, set->name) == 0 || c->shortname == set->shortname) {
    00159         duplicate = c;
    00160         break;
    00161       }
    00162     }
    00163     if (duplicate != NULL) {
    00164       /* The more complete set takes precedence over the version number. */
    00165       if ((duplicate->valid_files == set->valid_files && duplicate->version >= set->version) ||
    00166           duplicate->valid_files > set->valid_files) {
    00167         DEBUG(grf, 1, "Not adding %s (%i) as base " SET_TYPE " set (duplicate)", set->name, set->version);
    00168         delete set;
    00169       } else {
    00170         Tbase_set **prev = &BaseMedia<Tbase_set>::available_sets;
    00171         while (*prev != duplicate) prev = &(*prev)->next;
    00172
    00173         *prev = set;
    00174         set->next = duplicate->next;
    00175         /* don't allow recursive delete of all remaining items */
    00176         duplicate->next = NULL;
    00177
    00178         /* If the duplicate set is currently used (due to rescanning this can happen)
    00179          * update the currently used set to the new one. This will 'lie' about the
    00180          * version number until a new game is started which isn't a big problem */
    00181         if (BaseMedia<Tbase_set>::used_set == duplicate) BaseMedia<Tbase_set>::used_set = set;
    00182
    00183         DEBUG(grf, 1, "Removing %s (%i) as base " SET_TYPE " set (duplicate)", duplicate->name, duplicate->version);
    00184         delete duplicate;
    00185         ret = true;
    00186       }
    00187     } else {
    00188       Tbase_set **last = &BaseMedia<Tbase_set>::available_sets;
    00189       while (*last != NULL) last = &(*last)->next;
    00190
    00191       *last = set;
    00192       ret = true;
    00193     }
    00194     if (ret) {
    00195       DEBUG(grf, 1, "Adding %s (%i) as base " SET_TYPE " set", set->name, set->version);
    00196     }
    00197   } else {
    00198     delete set;
    00199   }
    00200   free(path);
    00201
    00202   delete ini;
    00203   return ret;
    00204 }
    00205
    00206 template <class Tbase_set>
    00207 /* static */ bool BaseMedia<Tbase_set>::SetSet(const char *name)
    00208 {
    00209   extern void CheckExternalFiles();
    00210
    00211   if (StrEmpty(name)) {
    00212     if (!BaseMedia<Tbase_set>::DetermineBestSet()) return false;
    00213     CheckExternalFiles();
    00214     return true;
    00215   }
    00216
    00217   for (const Tbase_set *s = BaseMedia<Tbase_set>::available_sets; s != NULL; s = s->next) {
    00218     if (strcmp(name, s->name) == 0) {
    00219       BaseMedia<Tbase_set>::used_set = s;
    00220       CheckExternalFiles();
    00221       return true;
    00222     }
    00223   }
    00224   return false;
    00225 }
    00226
    00227 template <class Tbase_set>
    00228 /* static */ char *BaseMedia<Tbase_set>::GetSetsList(char *p, const char *last)
    00229 {
    00230   p += seprintf(p, last, "List of " SET_TYPE " sets:\n");
    00231   for (const Tbase_set *s = BaseMedia<Tbase_set>::available_sets; s != NULL; s = s->next) {
    00232     p += seprintf(p, last, "%18s: %s", s->name, s->GetDescription());
    00233     int invalid = s->GetNumInvalid();
    00234     if (invalid != 0) {
    00235       int missing = s->GetNumMissing();
    00236       if (missing == 0) {
    00237         p += seprintf(p, last, " (%i corrupt file%s)\n", invalid, invalid == 1 ? "" : "s");
    00238       } else {
    00239         p += seprintf(p, last, " (unuseable: %i missing file%s)\n", missing, missing == 1 ? "" : "s");
    00240       }
    00241     } else {
    00242       p += seprintf(p, last, "\n");
    00243     }
    00244   }
    00245   p += seprintf(p, last, "\n");
    00246
    00247   return p;
    00248 }
    00249
    00250 #if defined(ENABLE_NETWORK)
    00251 #include "network/network_content.h"
    00252
    00253 template <class Tbase_set>
    00254 /* static */ bool BaseMedia<Tbase_set>::HasSet(const ContentInfo *ci, bool md5sum)
    00255 {
    00256   for (const Tbase_set *s = BaseMedia<Tbase_set>::available_sets; s != NULL; s = s->next) {
    00257     if (s->GetNumMissing() != 0) continue;
    00258
    00259     if (s->shortname != ci->unique_id) continue;
    00260     if (!md5sum) return true;
    00261
    00262     byte md5[16];
    00263     memset(md5, 0, sizeof(md5));
    00264     for (uint i = 0; i < Tbase_set::NUM_FILES; i++) {
    00265       for (uint j = 0; j < sizeof(md5); j++) {
    00266         md5[j] ^= s->files[i].hash[j];
    00267       }
    00268     }
    00269     if (memcmp(md5, ci->md5sum, sizeof(md5)) == 0) return true;
    00270   }
    00271
    00272   return false;
    00273 }
    00274
    00275 #else
    00276
    00277 template <class Tbase_set>
    00278 /* static */ bool BaseMedia<Tbase_set>::HasSet(const ContentInfo *ci, bool md5sum)
    00279 {
    00280   return false;
    00281 }
    00282
    00283 #endif /* ENABLE_NETWORK */
    00284
    00285 template <class Tbase_set>
    00286 /* static */ int BaseMedia<Tbase_set>::GetNumSets()
    00287 {
    00288   int n = 0;
    00289   for (const Tbase_set *s = BaseMedia<Tbase_set>::available_sets; s != NULL; s = s->next) {
    00290     if (s != BaseMedia<Tbase_set>::used_set && s->GetNumMissing() != 0) continue;
    00291     n++;
    00292   }
    00293   return n;
    00294 }
    00295
    00296 template <class Tbase_set>
    00297 /* static */ int BaseMedia<Tbase_set>::GetIndexOfUsedSet()
    00298 {
    00299   int n = 0;
    00300   for (const Tbase_set *s = BaseMedia<Tbase_set>::available_sets; s != NULL; s = s->next) {
    00301     if (s == BaseMedia<Tbase_set>::used_set) return n;
    00302     if (s->GetNumMissing() != 0) continue;
    00303     n++;
    00304   }
    00305   return -1;
    00306 }
    00307
    00308 template <class Tbase_set>
    00309 /* static */ const Tbase_set *BaseMedia<Tbase_set>::GetSet(int index)
    00310 {
    00311   for (const Tbase_set *s = BaseMedia<Tbase_set>::available_sets; s != NULL; s = s->next) {
    00312     if (s != BaseMedia<Tbase_set>::used_set && s->GetNumMissing() != 0) continue;
    00313     if (index == 0) return s;
    00314     index--;
    00315   }
    00316   error("Base" SET_TYPE "::GetSet(): index %d out of range", index);
    00317 }
    00318
    00319 template <class Tbase_set>
    00320 /* static */ const Tbase_set *BaseMedia<Tbase_set>::GetUsedSet()
    00321 {
    00322   return BaseMedia<Tbase_set>::used_set;
    00323 }
    00324
    00330 #define INSTANTIATE_BASE_MEDIA_METHODS(repl_type, set_type) \
    00331   template const char *repl_type::ini_set; \
    00332   template const char *repl_type::GetExtension(); \
    00333   template bool repl_type::AddFile(const char *filename, size_t pathlength); \
    00334   template bool repl_type::HasSet(const struct ContentInfo *ci, bool md5sum); \
    00335   template bool repl_type::SetSet(const char *name); \
    00336   template char *repl_type::GetSetsList(char *p, const char *last); \
    00337   template int repl_type::GetNumSets(); \
    00338   template int repl_type::GetIndexOfUsedSet(); \
    00339   template const set_type *repl_type::GetSet(int index); \
    00340   template const set_type *repl_type::GetUsedSet(); \
    00341   template bool repl_type::DetermineBestSet();
    00342