From 05398e71d2dd1bd6f5c770f25e22abeabdf221c6 Mon Sep 17 00:00:00 2001
From: Allanis <allanis@saracraft.net>
Date: Sat, 26 Apr 2014 18:53:22 +0100
Subject: [PATCH] [Change] Huge changes to Lephisto's data management.

---
 src/ai.c       |  11 +--
 src/conf.c     |  45 +++--------
 src/economy.c  |   4 +-
 src/faction.c  |   4 +-
 src/font.c     |   4 +-
 src/intro.c    |   4 +-
 src/ldata.c    | 198 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/ldata.h    |  16 ++++
 src/lephisto.c |  90 ++++------------------
 src/lephisto.h |   9 ---
 src/llua.c     |   6 +-
 src/mission.c  |   6 +-
 src/music.c    |  13 +---
 src/opengl.c   |   6 +-
 src/outfit.c   |   4 +-
 src/pack.c     |  92 +++++++++++++----------
 src/pack.h     |  28 ++-----
 src/pilot.c    |   4 +-
 src/player.c   |   6 +-
 src/save.c     |   3 +-
 src/ship.c     |   4 +-
 src/sound.c    |  11 +--
 src/space.c    |   6 +-
 src/unidiff.c  |   4 +-
 24 files changed, 342 insertions(+), 236 deletions(-)
 create mode 100644 src/ldata.c
 create mode 100644 src/ldata.h

diff --git a/src/ai.c b/src/ai.c
index 0b779a6..cb79b5d 100644
--- a/src/ai.c
+++ b/src/ai.c
@@ -58,7 +58,7 @@
 #include "pilot.h"
 #include "player.h"
 #include "physics.h"
-#include "pack.h"
+#include "ldata.h"
 #include "rng.h"
 #include "space.h"
 #include "faction.h"
@@ -387,7 +387,7 @@ int ai_init(void) {
   uint32_t nfiles, i;
 
   /* Get the file list. */
-  files = pack_listfiles(data, &nfiles);
+  files = ldata_list(AI_PREFIX, &nfiles);
 
   /* Load the profiles. */
   for(i = 0; i < nfiles; i++)
@@ -399,11 +399,6 @@ int ai_init(void) {
       if(ai_loadProfile(files[i])) /* Load the profiles. */
         WARN("Error loading AI profile '%s'", files[i]);
 
-  /* Free the char allocated by pack. */
-  for(i = 0; i < nfiles; i++)
-    free(files[i]);
-  free(files);
-
   DEBUG("Loaded %d AI profile%c", nprofiles, (nprofiles==1)?' ':'s');
 
   return 0;
@@ -456,7 +451,7 @@ static int ai_loadProfile(char* filename) {
   lua_loadVector(L);
 
   /* Now load the file, since all the functions have been previously loaded. */
-  buf = pack_readfile(DATA, filename, &bufsize);
+  buf = ldata_read(filename, &bufsize);
   if(luaL_dobuffer(L, buf, bufsize, filename) != 0) {
     ERR("Error loading AI file: %s\n"
         "%s\n"
diff --git a/src/conf.c b/src/conf.c
index b224d46..d940362 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -13,7 +13,7 @@
 #include "input.h"
 #include "music.h"
 #include "nebulae.h"
-#include "pack.h"
+#include "ldata.h"
 #include "lfile.h"
 #include "conf.h"
 
@@ -85,32 +85,6 @@ static void print_usage(char** argv) {
  * @brief Set the default configuration.
  */
 void conf_setDefaults(void) {
-  int i, nfiles;
-  char** files;
-  size_t len;
-
-  /* Find data. */
-  if(lfile_fileExists("%s-%d.%d.%d", DATA_NAME, VMAJOR, VMINOR, VREV)) {
-    data = malloc(PATH_MAX);
-    snprintf(data, PATH_MAX, "%s-%d.%d.%d", DATA_NAME, VMAJOR, VMINOR, VREV);
-  } else if(lfile_fileExists(DATA_DEF))
-    data = DATA_DEF;
-  else {
-    files = lfile_readDir(&nfiles, ".");
-    len = strlen(DATA_NAME);
-    for(i = 0; i < nfiles; i++) {
-      if(strncmp(files[i], DATA_NAME, len) == 0) {
-        /* Must be packfile. */
-        if(pack_check(files[i]))
-          continue;
-
-        data = strdup(files[i]);
-      }
-    }
-    for(i = 0; i < nfiles; i++)
-      free(files[i]);
-    free(files);
-  }
   /* GL. */
   gl_screen.w = 800;
   gl_screen.h = 600;
@@ -142,7 +116,10 @@ int conf_loadConfig(const char* file) {
   if(luaL_dofile(L, file) == 0) {
     /* Conf file exists indeed. */
     /* Global. */
-    conf_loadString("data", data);
+    lua_getglobal(L, "data");
+    if(lua_isstring(L, -1))
+      ldata_setPath((char*)lua_tostring(L, -1));
+    lua_remove(L, -1);
 
     /* OpenGL properties.. */
 
@@ -212,14 +189,12 @@ int conf_loadConfig(const char* file) {
 
     /* Joystick. */
     lua_getglobal(L, "joystick");
-    if(lua_isnumber(L, -1)) {
+    if(lua_isnumber(L, -1))
       indjoystick = (int)lua_tonumber(L, -1);
-      lua_remove(L, -1);
-    }
-    else if(lua_isstring(L, -1)) {
+    else if(lua_isstring(L, -1))
       namjoystick = strdup((char*)lua_tostring(L, -1));
-      lua_remove(L, -1);
-    }
+
+    lua_remove(L, -1);
 
     /* Keybindings. */
     for(i = 0; strcmp(keybindNames[i], "end"); i++) {
@@ -362,7 +337,7 @@ void conf_parseCLI(int argc, char** argv) {
       gl_screen.flags |= OPENGL_VSYNC;
       break;
     case 'd':
-      data = strdup(optarg);
+      ldata_setPath(optarg);
       break;
     case 'j':
       indjoystick = atoi(optarg);
diff --git a/src/economy.c b/src/economy.c
index b7066d1..7bbeaeb 100644
--- a/src/economy.c
+++ b/src/economy.c
@@ -16,7 +16,7 @@
 
 #include "lephisto.h"
 #include "lxml.h"
-#include "pack.h"
+#include "ldata.h"
 #include "log.h"
 #include "spfx.h"
 #include "pilot.h"
@@ -154,7 +154,7 @@ void commodity_Jettison(int pilot, Commodity* com, int quantity) {
 /* Init/exit */
 int commodity_load(void) {
   uint32_t bufsize;
-  char* buf = pack_readfile(DATA, COMMODITY_DATA, &bufsize);
+  char* buf = ldata_read(COMMODITY_DATA, &bufsize);
 
   xmlNodePtr node;
   xmlDocPtr doc = xmlParseMemory(buf, bufsize);
diff --git a/src/faction.c b/src/faction.c
index cb13868..413c07b 100644
--- a/src/faction.c
+++ b/src/faction.c
@@ -10,7 +10,7 @@
 #include "opengl.h"
 #include "lephisto.h"
 #include "log.h"
-#include "pack.h"
+#include "ldata.h"
 #include "lxml.h"
 #include "rng.h"
 #include "faction.h"
@@ -548,7 +548,7 @@ void factions_reset(void) {
 int factions_load(void) {
   int mem;
   uint32_t bufsize;
-  char* buf = pack_readfile(DATA, FACTION_DATA, &bufsize);
+  char* buf = ldata_read(FACTION_DATA, &bufsize);
 
   xmlNodePtr factions, node;
   xmlDocPtr doc = xmlParseMemory(buf, bufsize);
diff --git a/src/font.c b/src/font.c
index 247b297..f7229d9 100644
--- a/src/font.c
+++ b/src/font.c
@@ -22,7 +22,7 @@
 
 #include "lephisto.h"
 #include "log.h"
-#include "pack.h"
+#include "ldata.h"
 
 #define FONT_DEF  "../dat/font.ttf" /**< Default font path. */
 
@@ -523,7 +523,7 @@ void gl_fontInit(glFont* font, const char* fname, const unsigned int h) {
 
   if(font == NULL) font = &gl_defFont;
 
-  FT_Byte* buf = pack_readfile(DATA, (fname!=NULL) ? fname : FONT_DEF, &bufsize);
+  FT_Byte* buf = ldata_read((fname != NULL) ? fname : FONT_DEF, &bufsize);
 
   /* Allocatagery. */
   font->textures = malloc(sizeof(GLuint)*128);
diff --git a/src/intro.c b/src/intro.c
index 6f65811..b2f3c8f 100644
--- a/src/intro.c
+++ b/src/intro.c
@@ -10,7 +10,7 @@
 #include "SDL.h"
 #include "lephisto.h"
 #include "log.h"
-#include "pack.h"
+#include "ldata.h"
 #include "font.h"
 #include "music.h"
 #include "intro.h"
@@ -33,7 +33,7 @@ static int intro_load(void) {
   int i, p, n;
   int mem;
 
-  intro_buf = pack_readfile(DATA, "../dat/intro", &intro_size);
+  intro_buf = ldata_read("../dat/intro", &intro_size);
   intro_length = intro_size; /* Length aproximation! */
 
   /* Create intro font. */
diff --git a/src/ldata.c b/src/ldata.c
new file mode 100644
index 0000000..466df24
--- /dev/null
+++ b/src/ldata.c
@@ -0,0 +1,198 @@
+/**
+ * @file ldata.c
+ *
+ * @brief Wrapper to handle reading/writing the ldata file.
+ *
+ * Optimizes to minimize the opens and frees, plus tries to read from the
+ * filesystem instead of always looking for a packfile.
+ */
+
+#include "lephisto.h"
+#include "log.h"
+#include "md5.h"
+#include "lxml.h"
+#include "pack.h"
+#include "lfile.h"
+#include "ldata.h"
+
+#define LDATA_FILENAME  "ldata"
+#define LDATA_DEF       "ldata"
+
+#define XML_START_ID    "Start" /**< XML document tag of module start file. */
+#define START_DATA      "../dat/start.xml" /**< Path to module start file. */
+
+/* Packfile. */
+static char* ldata_filename   = NULL; /**< Packfile name. */
+static Packfile_t* ldata_pack = NULL; /**< Actual packfile. */
+static char* ldata_packName   = NULL; /**< Name of the ldata module. */
+
+/* File list. */
+static char** ldata_fileList    = NULL; /**< List of the files in the packfile. */
+static uint32_t ldata_fileNList = 0;    /**< Number of files in ldata_fileList. */
+
+/**
+ * @brief Check to see if path is a ldata file.
+ *    @param path Path to check to see if it's an ldata file.
+ *    @return 1 if it is an ldata file, otherwise 0.
+ */
+int ldata_check(char* path) {
+  return pack_check(path);
+}
+
+/**
+ * @brief Set the current ldata path to use.
+ *    @param path Path to set.
+ */
+int ldata_setPath(char* path) {
+  if(ldata_filename != NULL)
+    free(ldata_filename);
+  ldata_filename = (path == NULL) ? NULL : strdup(path);
+  return 0;
+}
+
+/**
+ * @brief Open a packfile if needed.
+ */
+static int ldata_openPackfile(void) {
+  int i;
+  char** files;
+  int nfiles;
+  size_t len;
+
+  if(lfile_fileExists("%s-%d.%d.%d", LDATA_FILENAME, VMAJOR, VMINOR, VREV)) {
+    ldata_filename = malloc(PATH_MAX);
+    snprintf(ldata_filename, PATH_MAX, "%s-%d.%d.%d", LDATA_FILENAME, VMAJOR,
+        VMINOR, VREV);
+  }
+  else if(lfile_fileExists(LDATA_DEF))
+    ldata_filename = strdup(LDATA_DEF);
+  else {
+    files = lfile_readDir(&nfiles, ".");
+    len = strlen(LDATA_FILENAME);
+    for(i = 0; i < nfiles; i++) {
+      if(strncmp(files[i], LDATA_FILENAME, len)==0) {
+        /* Must be packed. */
+        if(pack_check(files[i]))
+          continue;
+
+        ldata_filename = strdup(files[i]);
+        break;
+      }
+    }
+    for(i = 0; i < nfiles; i++)
+      free(files[i]);
+    free(files);
+  }
+  return 0;
+}
+
+/**
+ * @brief Open the ldata file.
+ *    @return 0 on success.
+ */
+int ldata_open(void) {
+  return 0;
+}
+
+/**
+ * @brief Close and clean up the ldata file.
+ */
+void ldata_close(void) {
+  unsigned int i;
+
+  /* Destroy the name. */
+  if(ldata_packName != NULL) {
+    free(ldata_packName);
+    ldata_packName = NULL;
+  }
+
+  /* Destroy the list. */
+  if(ldata_fileList != NULL) {
+    for(i = 0; i < ldata_fileNList; i++)
+      free(ldata_fileList[i]);
+
+    free(ldata_fileList);
+    ldata_fileList = NULL;
+    ldata_fileNList = 0;
+  }
+
+  /* Close the packfile. */
+  /*
+  pack_close(ldata_pack);
+  ldata_pack = NULL;
+  */
+}
+
+/**
+ * @brief Get the ldata's name.
+ *    @return The ldata's name.
+ */
+char* ldata_name(void) {
+  char* buf;
+  uint32_t size;
+  xmlNodePtr node;
+  xmlDocPtr doc;
+
+  /* Alreay loaded. */
+  if(ldata_packName != NULL)
+    return ldata_packName;
+
+  /* We'll just read it and parse it. */
+  buf = ldata_read(START_DATA, &size);
+  doc = xmlParseMemory(buf, size);
+
+  /* Make sure it's what we are looking for. */
+  node = doc->xmlChildrenNode;
+  if(!xml_isNode(node, XML_START_ID)) {
+    ERR("Malformed '"START_DATA"' file: missing root element '"XML_START_ID"'");
+    return NULL;
+  }
+
+  /* Check if node is valid. */
+  node = node->xmlChildrenNode; /* First system node. */
+  if(node == NULL) {
+    ERR("Malformed '"START_DATA"' file: does not contain elements");
+    return NULL;
+  }
+  do {
+    xmlr_strd(node, "name", ldata_packName);
+  } while(xml_nextNode(node));
+
+  xmlFreeDoc(doc);
+  free(buf);
+
+  /* Check if data name is found. */
+  if(ldata_packName == NULL)
+    WARN("No ldata packname found.");
+  
+  return ldata_packName;
+}
+
+/**
+ * @brief Read a file from the ldata.
+ */
+void* ldata_read(const char* filename, uint32_t* filesize) {
+  if(ldata_filename == NULL)
+    ldata_openPackfile();
+  return pack_readfile(ldata_filename, filename, filesize);
+}
+
+/**
+ * @brief Get the list of files in the ldata.
+ */
+char** ldata_list(const char* path, uint32_t* nfiles) {
+  (void)path;
+
+  if(ldata_fileList != NULL) {
+    *nfiles = ldata_fileNList;
+    return ldata_fileList;
+  }
+
+  if(ldata_filename == NULL)
+    ldata_openPackfile();
+
+  ldata_fileList = pack_listfiles(ldata_filename, &ldata_fileNList);
+  *nfiles = ldata_fileNList;
+  return ldata_fileList;
+}
+
diff --git a/src/ldata.h b/src/ldata.h
new file mode 100644
index 0000000..e108a53
--- /dev/null
+++ b/src/ldata.h
@@ -0,0 +1,16 @@
+#pragma once
+#include <stdint.h>
+
+/* ldata open/close. */
+int ldata_open(void);
+void ldata_close(void);
+
+/* General. */
+int ldata_check(char* path);
+int ldata_setPath(char* path);
+char* ldata_name(void);
+
+/* Individual file functions. */
+void* ldata_read(const char* filename, uint32_t* filesize);
+char** ldata_list(const char* path, uint32_t* nfiles);
+
diff --git a/src/lephisto.c b/src/lephisto.c
index 9a1601d..85df593 100644
--- a/src/lephisto.c
+++ b/src/lephisto.c
@@ -36,7 +36,7 @@
 #include "rng.h"
 #include "ai.h"
 #include "outfit.h"
-#include "pack.h"
+#include "ldata.h"
 #include "weapon.h"
 #include "faction.h"
 #include "lxml.h"
@@ -55,9 +55,6 @@
 #include "nebulae.h"
 
 
-#define XML_START_ID    "Start"            /**< XML document tag of module start file. */
-#define START_DATA      "../dat/start.xml" /**< Path to module start file. */
-
 #define CONF_FILE       "conf"             /**< Configuration file by default. */
 #define VERSION_FILE    "VERSION"          /**< Version file by default. */
 #define VERSION_LEN     10                 /**< Max length of the version file. */
@@ -72,8 +69,6 @@ static char version[VERSION_LEN]; /**< Contains version. */
 static glTexture* loading;        /**< Loading screen. */
 
 /* Some defaults. */
-char* data = NULL;                  /**< Path to datafile. */
-char* dataname = NULL;              /**< Name of data file. */
 int nosound = 0;                    /**< Disable sound when loaded. */
 int show_fps = 1;                   /**< Shows fps - default true. */
 int max_fps = 0;                    /**< Default FPS limit, 0 is no limit. */
@@ -90,7 +85,6 @@ static void load_all(void);
 static void unload_all(void);
 static void display_fps(const double dt);
 static void window_caption(void);
-static void data_name(void);
 static void debug_sigInit(void);
 /* Update. */
 static void fps_control(void);
@@ -151,9 +145,12 @@ int main(int argc, char** argv) {
   conf_loadConfig(buf); /* Have Lua parse config. */
   conf_parseCLI(argc, argv); /* Parse CLI arguments. */
 
+  /* Open the data. */
+  if(ldata_open() != 0)
+    ERR("Failed to open ldata.");
+
   /* Load the data basics. */
-  data_name();
-  LOG(" %s", dataname);
+  LOG(" %s", ldata_name());
   DEBUG();
 
   /* Display the SDL Version. */
@@ -263,6 +260,9 @@ int main(int argc, char** argv) {
   gl_freeFont(NULL);
   gl_freeFont(&gl_smallFont);
 
+  /* Close data. */
+  ldata_close();
+
   /* Exit subsystems. */
   toolkit_exit();   /* Kill the toolkit. */
   ai_exit();        /* Stop the Lua AI magicness. */
@@ -292,7 +292,7 @@ void loadscreen_load(void) {
   int nload;
 
   /* Count the loading screens. */
-  files = pack_listfiles(data, &nfiles);
+  files = ldata_list("../gfx/loading/", &nfiles);
   len = strlen("../gfx/loading/");
   nload = 0;
   loadscreens = malloc(sizeof(char*) * nfiles);
@@ -300,8 +300,7 @@ void loadscreen_load(void) {
     if(strncmp(files[i], "../gfx/loading/", len)==0) {
       loadscreens[nload] = files[i];
       nload++;
-    } else
-      free(files[i]);
+    }
   }
 
   /* Must have loading screens. */
@@ -315,8 +314,6 @@ void loadscreen_load(void) {
   loading = gl_newImage(file_path);
 
   /* Clean up. */
-  for(i = 0; i < nload; i++)
-    free(loadscreens[i]);
   free(loadscreens);
 }
 
@@ -595,73 +592,16 @@ static void display_fps(const double dt) {
     gl_print(NULL, x, y, NULL, "%3.1fx", dt_mod);
 }
 
-/**
- * @fn static void data_name(void)
- *
- * @brief Set the data module's name.
- */
-static void data_name(void) {
-  uint32_t bufsize;
-  char* buf;
-
-  /* Check if data file is valid. */
-  if((DATA == NULL) || (pack_check(DATA))) {
-    WARN("Data file '%s' not found", DATA);
-    WARN("You should specify which data file to use with '-d'");
-    WARN("See -h or --help for more information");
-    SDL_Quit();
-    exit(EXIT_FAILURE);
-  }
-
-  /* Check the version. */
-  buf = pack_readfile(DATA, VERSION_FILE, &bufsize);
-
-  if(strncmp(buf, version, bufsize) != 0) {
-    WARN("Lephisto version and data module version differ!");
-    WARN("Lephisto is v%s, data is for v%s", version, buf);
-  }
-
-  free(buf);
-
-  /* Load the datafiles name. */
-  buf = pack_readfile(DATA, START_DATA, &bufsize);
-
-  xmlNodePtr node;
-  xmlDocPtr doc = xmlParseMemory(buf, bufsize);
-
-  node = doc->xmlChildrenNode;
-  if(!xml_isNode(node, XML_START_ID)) {
-    ERR("Maformed '"START_DATA"' file: missing root element '"XML_START_ID"'");
-    return;
-  }
-
-  node = node->xmlChildrenNode; /* First node. */
-  if(node == NULL) {
-    ERR("Malformed '"START_DATA"' file: does not contain elements");
-    return;
-  }
-  do {
-    xmlr_strd(node, "name", dataname);
-  } while(xml_nextNode(node));
-
-  xmlFreeDoc(doc);
-  free(buf);
-}
-
 /**
  * @fn static void window_caption(void)
  *
  * @brief Set the window caption.
  */
 static void window_caption(void) {
-  size_t len;
-  char* tmp;
+  char buf[PATH_MAX];
 
-  len = strlen(dataname) + strlen(APPNAME);
-  tmp = malloc(sizeof(char)*len);
-  snprintf(tmp, len, APPNAME" - %s", dataname);
-  SDL_WM_SetCaption(tmp, NULL);
-  free(tmp);
+  snprintf(buf, PATH_MAX, APPNAME" - %s", ldata_name());
+  SDL_WM_SetCaption(buf, NULL);
 }
 
 static char human_version[50];  /**< Stores human readable version string. */
@@ -675,7 +615,7 @@ static char human_version[50];  /**< Stores human readable version string. */
  */
 char* lephisto_version(void) {
   if(human_version[0] == '\0')
-    snprintf(human_version, 50, " "APPNAME" v%s - %s", version, dataname);
+    snprintf(human_version, 50, " "APPNAME" v%s - %s", version, ldata_name());
 
   return human_version;
 }
diff --git a/src/lephisto.h b/src/lephisto.h
index 34e6f76..4c074b2 100644
--- a/src/lephisto.h
+++ b/src/lephisto.h
@@ -19,15 +19,6 @@
 
 #define pow2(x)   ((x)*(x))             /**< ^2 */
 
-#define DATA_NAME "ldata"               /**< Default data name. */
-
-#ifndef DATA_DEF
-#define DATA_DEF   DATA_NAME            /**< Default data packfile. */
-#endif
-extern char* data;                      /**< Modifiable datafile. */
-#define DATA        data                /**< Standard data file to use. */
-extern char *dataname;                  /**< Datafile name. */
-
 /* Max filename path. */
 #ifndef PATH_MAX
 #  define PATH_MAX 256                  /**< If not already defined. */
diff --git a/src/llua.c b/src/llua.c
index be95d7d..aa952ac 100644
--- a/src/llua.c
+++ b/src/llua.c
@@ -20,7 +20,7 @@
 #include "space.h"
 #include "land.h"
 #include "map.h"
-#include "pack.h"
+#include "ldata.h"
 #include "lluadef.h"
 #include "llua.h"
 
@@ -142,9 +142,9 @@ static int llua_packfileLoader(lua_State* L) {
   filename = (char*) lua_tostring(L, 1);
 
   /* Try to locate the data. */
-  buf = pack_readfile(DATA, filename, &bufsize);
+  buf = ldata_read(filename, &bufsize);
   if(buf == NULL) {
-    lua_pushfstring(L, "%s not found in packfile %s", filename, DATA);
+    lua_pushfstring(L, "%s not found in ldata.", filename);
     return 1;
   }
 
diff --git a/src/mission.c b/src/mission.c
index f471085..954fa68 100644
--- a/src/mission.c
+++ b/src/mission.c
@@ -10,7 +10,7 @@
 #include "lephisto.h"
 #include "log.h"
 #include "hook.h"
-#include "pack.h"
+#include "ldata.h"
 #include "lxml.h"
 #include "faction.h"
 #include "player.h"
@@ -117,7 +117,7 @@ static int mission_init(Mission* mission, MissionData* misn, int load) {
   misn_loadLibs(mission->L);             /* Load our custom libraries. */
 
   /* Load the file. */
-  buf = pack_readfile(DATA, misn->lua, &bufsize);
+  buf = ldata_read(misn->lua, &bufsize);
   if(luaL_dobuffer(mission->L, buf, bufsize, misn->lua) != 0) {
     ERR("Error loading mission file: %s\n"
         "%s\n"
@@ -551,7 +551,7 @@ static MissionData* mission_parse(const xmlNodePtr parent) {
 /* Load/Free. */
 int missions_load(void) {
   uint32_t bufsize;
-  char* buf = pack_readfile(DATA, MISSION_DATA, &bufsize);
+  char* buf = ldata_read(MISSION_DATA, &bufsize);
 
   MissionData* tmp;
 
diff --git a/src/music.c b/src/music.c
index 55c49f9..d5fb29c 100644
--- a/src/music.c
+++ b/src/music.c
@@ -13,7 +13,7 @@
 
 #include "lephisto.h"
 #include "log.h"
-#include "pack.h"
+#include "ldata.h"
 #include "music.h"
 
 #define MUSIC_PREFIX    "../snd/music/" /**< Prefix of where to find music. */
@@ -173,7 +173,7 @@ static int music_find(void) {
   if(music_disabled) return 0;
 
   /* Get the file list. */
-  files = pack_listfiles(data, &nfiles);
+  files = ldata_list(MUSIC_PREFIX, &nfiles);
 
   /* Load the profiles. */
   mem = 0;
@@ -199,11 +199,6 @@ static int music_find(void) {
   }
   music_selection = realloc(music_selection, sizeof(char*)*nmusic_selection);
 
-  /* Free the char* allocated by pack. */
-  for(i = 0; i < nfiles; i++)
-    free(files[i]);
-  free(files);
-
   DEBUG("Loaded %d song%c", nmusic_selection, (nmusic_selection==1)?' ':'s');
 
   return 0;
@@ -238,7 +233,7 @@ void music_load(const char* name) {
 
   /* Load the data. */
   snprintf(filename, PATH_MAX, MUSIC_PREFIX"%s"MUSIC_SUFFIX, name);
-  music_data = pack_readfile(DATA, filename, &size);
+  music_data = ldata_read(filename, &size);
   music_rw = SDL_RWFromMem(music_data, size);
   music_music = Mix_LoadMUS_RW(music_rw);
   if(music_music == NULL)
@@ -336,7 +331,7 @@ static int music_luaInit(void) {
   lua_loadMusic(music_lua, 0);  /* Write it. */
 
   /* Load the actual lua music code. */
-  buf = pack_readfile(DATA, MUSIC_LUA_PATH, &bufsize);
+  buf = ldata_read(MUSIC_LUA_PATH, &bufsize);
   if(luaL_dobuffer(music_lua, buf, bufsize, MUSIC_LUA_PATH) != 0) {
     ERR("Error loading music file: %s\n"
         "%s\n"
diff --git a/src/opengl.c b/src/opengl.c
index 07f521c..a7dfbb5 100644
--- a/src/opengl.c
+++ b/src/opengl.c
@@ -12,7 +12,7 @@
 
 #include "lephisto.h"
 #include "log.h"
-#include "pack.h"
+#include "ldata.h"
 #include "opengl.h"
 
 /* Requirements. */
@@ -394,9 +394,9 @@ static glTexture* gl_loadNewImage(const char* path) {
   char* buf;
 
   /* Load from packfile. */
-  buf = pack_readfile(DATA, (char*)path, &filesize);
+  buf = ldata_read(path, &filesize);
   if(buf == NULL) {
-    ERR("Loading surface from packfile.");
+    ERR("Loading surface from ldata.");
     return NULL;
   }
   SDL_RWops* rw = SDL_RWFromMem(buf, filesize);
diff --git a/src/outfit.c b/src/outfit.c
index a376e43..d581ad7 100644
--- a/src/outfit.c
+++ b/src/outfit.c
@@ -5,7 +5,7 @@
 
 #include "lephisto.h"
 #include "log.h"
-#include "pack.h"
+#include "ldata.h"
 #include "lxml.h"
 #include "spfx.h"
 #include "outfit.h"
@@ -1038,7 +1038,7 @@ static int outfit_parse(Outfit* tmp, const xmlNodePtr parent) {
 int outfit_load(void) {
   int i, mem;
   uint32_t bufsize;
-  char* buf = pack_readfile(DATA, OUTFIT_DATA, &bufsize);
+  char* buf = ldata_read(OUTFIT_DATA, &bufsize);
 
   xmlNodePtr node;
   xmlDocPtr doc = xmlParseMemory(buf, bufsize);
diff --git a/src/pack.c b/src/pack.c
index 38835f0..e1b2a48 100644
--- a/src/pack.c
+++ b/src/pack.c
@@ -32,13 +32,31 @@
  * -- Pack the files.
  */
 
+/**
+ * @struct Packfile
+ *
+ * @brief Abstracts around packfiles.
+ */
+struct Packfile_s {
+#ifdef _POSIX_SOURCE
+  int fd; /**< File descriptor. */
+#else
+  FILE* fp; /**< For non-posix. */
+#endif
+  uint32_t pos;   /**< Cursor position. */
+  uint32_t start; /**< File start. */
+  uint32_t end;   /**< File end. */
+};
+
 #undef DEBUG /* This will be spammy. */
 #define DEBUG(str, args...) do{;} while(0)
 
 #define BLOCKSIZE 128*1024 /**< The read/write block size */
 
 /* Max filename length. */
-#define MAX_FILENAME 100 /**< Maximum file name length. */
+#ifndef PATH_MAX
+#define PATH_MAX  256
+#endif
 
 #define PERMS S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH /**< Default permissions. */
 
@@ -165,9 +183,9 @@ int pack_files(const char* outfile, const char** infiles, const uint32_t nfiles)
       ERR("File %s does not exist", infiles[i]);
       return -1;
     }
-    if(strlen(infiles[i]) > MAX_FILENAME) {
+    if(strlen(infiles[i]) > PATH_MAX) {
       ERR("filename '%s' is too long, should be only %d characters", infiles[i],
-          MAX_FILENAME);
+          PATH_MAX);
       return -1;
     }
     namesize += strlen(infiles[i]);
@@ -251,30 +269,32 @@ int pack_files(const char* outfile, const char** infiles, const uint32_t nfiles)
 }
 #undef WRITE
 
+#ifdef _POSIX_SOURCE
+#define READ(b,n) if(read(file->fd, (b), (n))!=(n)) { \
+  ERR("Fewer bytes read than expected."); \
+  free(buf); return NULL; }
+#else
+#define READ(b,n) if(fread((b), 1, (n), file->fp)!=(n)) { \
+  ERR("Fewer bytes read then expected"); \
+  free(buf); return NULL; }
+#endif
 /**
- * @fn int pack_open(Packfile* file, const char* packfile, const char* filename)
- *
  * @brief Open a file in the packfile for reading.
  *    @param file Packfile to store data into.
  *    @param packfile Path to real packfile.
  *    @param filename Name of the file within th. packfile.
  *    @return 0 on success.
  */
-#ifdef _POSIX_SOURCE
-#define READ(b,n) if(read(file->fd, (b), (n))!=(n)) { \
-  ERR("Too few bytes read. Expected more."); \
-  free(buf); return -1; }
-#else
-#define READ(b,n) if(fread((b), 1, (n), file->fp)!=(n)) { \
-  ERR("Fewer bytes read then expected"); \
-  free(buf); return -1; }
-#endif
-int pack_open(Packfile* file, const char* packfile, const char* filename) {
+Packfile_t* pack_open(const char* packfile, const char* filename) {
   int j;
   uint32_t nfiles, i;
-  char* buf = malloc(MAX_FILENAME);
+  char* buf = malloc(PATH_MAX);
+  Packfile_t* file;
 
-  file->start = file->end = 0;
+  /* Allocate memory. */
+  file = malloc(sizeof(Packfile_t));
+  memset(file, 0, sizeof(Packfile_t));
+  buf = malloc(PATH_MAX);
 
 #ifdef _POSIX_SOURCE
   file->fd = open(packfile, O_RDONLY);
@@ -284,13 +304,13 @@ int pack_open(Packfile* file, const char* packfile, const char* filename) {
   if(file->fp == NULL) {
 #endif
     ERR("Error opening %s: %s", filename, strerror(errno));
-    return -1;
+    return NULL;
   }
 
   READ(buf, sizeof(magic)); /* Make sure it's a packfile. */
   if(memcmp(buf, &magic, sizeof(magic))) {
     ERR("File %s is not a valid packfile", filename);
-    return -1;
+    return NULL;
   }
 
   READ(&nfiles, 4);
@@ -324,7 +344,7 @@ int pack_open(Packfile* file, const char* packfile, const char* filename) {
     if(errno) {
 #endif
       ERR("Failure to seek to file start: %s", strerror(errno));
-      return -1;
+      return NULL;
     }
     READ(&file->end, 4);
     DEBUG("\t%d bytes", file->end);
@@ -332,15 +352,13 @@ int pack_open(Packfile* file, const char* packfile, const char* filename) {
     file->end += file->start;
   } else {
     ERR("File '%s' not found in packfile '%s'", filename, packfile);
-    return -1;
+    return NULL;
   }
-  return 0;
+  return file;
 }
 #undef READ
 
 /**
- * @fn ssize_t pack_read(Packfile* file, void* buf, size_t count)
- *
  * @brief Reads data from a packfile.
  *
  * Behaves like POSIX read.
@@ -349,7 +367,7 @@ int pack_open(Packfile* file, const char* packfile, const char* filename) {
  *    @param count Bytes to read.
  *    @return Bytes to read or -1 on error.
  */
-ssize_t pack_read(Packfile* file, void* buf, size_t count) {
+ssize_t pack_read(Packfile_t* file, void* buf, size_t count) {
   if(file->pos + count > file->end)
     count = file->end - file->pos; /* Can't go past the end! */
   if(count == 0) return 0;
@@ -370,8 +388,6 @@ ssize_t pack_read(Packfile* file, void* buf, size_t count) {
 }
 
 /**
- * @fn off_t pack_seek(Packfile* file, off_t offset, int whence)
- *
  * @brief Seeks within a file inside a packfile.
  *
  * Behaves like lseek/fseek.
@@ -382,7 +398,7 @@ ssize_t pack_read(Packfile* file, void* buf, size_t count) {
  *    @param whence Either SEEK_SET, SEEK_CUR or SEEK_END.
  *    @return The position moved to.
  */
-off_t pack_seek(Packfile* file, off_t offset, int whence) {
+off_t pack_seek(Packfile_t* file, off_t offset, int whence) {
   DEBUG("Attempting to seek offset: %d, whence: %d", offset, whence);
   off_t ret;
   switch(whence) {
@@ -427,13 +443,11 @@ off_t pack_seek(Packfile* file, off_t offset, int whence) {
 }
 
 /**
- * @fn long pack_tell(Packfile* file)
- *
  * @brief Get the current position in the file.
  *    @param file Packfile to get the position from.
  *    @return The current position in the file.
  */
-long pack_tell(Packfile* file) {
+long pack_tell(Packfile_t* file) {
   return file->pos - file->start;
 }
 
@@ -447,16 +461,19 @@ long pack_tell(Packfile* file) {
  *    @return A pointer to the sata in the file or NULL if an error accured.
  */
 void* pack_readfile(const char* packfile, const char* filename, uint32_t* filesize) {
-  Packfile* file = (Packfile*)malloc(sizeof(Packfile));
+  Packfile_t* file;
   void* buf;
   char* str;
   int size, bytes;
 
+  /* Initialize size to 0. */
   if(filesize)
     *filesize = 0;
 
-  if(pack_open(file, packfile, filename)) {
-    ERR("Opening packfile");
+  /* Open the packfile. */
+  file = pack_open(packfile, filename);
+  if(file == NULL) {
+    ERR("Opening packfile '%s'.", packfile);
     return NULL;
   }
   DEBUG("Opened file '%s' from '%s'", filename, packfile);
@@ -505,7 +522,6 @@ void* pack_readfile(const char* packfile, const char* filename, uint32_t* filesi
     return NULL;
   }
   DEBUG("Closed '%s' in '%s'", filename, packfile);
-  free(file);
 
   if(filesize)
     *filesize = size;
@@ -565,7 +581,7 @@ char** pack_listfiles(const char* packfile, uint32_t* nfiles) {
   for(i = 0; i < *nfiles; i++) {
     /* Start searching files. */
     j = 0;
-    filenames[i] = malloc(MAX_FILENAME * sizeof(char));
+    filenames[i] = malloc(PATH_MAX * sizeof(char));
     READ(&filenames[i][j], 1); /* Get the name. */
     while(filenames[i][j++] != '\0')
       READ(&filenames[i][j], 1);
@@ -584,13 +600,11 @@ char** pack_listfiles(const char* packfile, uint32_t* nfiles) {
 #undef READ
 
 /**
- * @fn int pack_close(Packfile* file)
- *
  * @brief Closes a packfile.
  *    @param file Packfile to close.
  *    @return 0 on success.
  */
-int pack_close(Packfile* file) {
+int pack_close(Packfile_t* file) {
   int i;
 #ifdef _POSIX_SOURCE
   i = close(file->fd);
diff --git a/src/pack.h b/src/pack.h
index 9a88545..2be5f36 100644
--- a/src/pack.h
+++ b/src/pack.h
@@ -6,33 +6,19 @@
 #include <stdint.h>
 #include <sys/types.h>
 
-
-/**
- * @struct Packfile
- *
- * @brief Abstracts around packfile
- */
-typedef struct Packfile_ {
-#ifdef _POSIX_SOURCE
-  int fd;               /**< File descriptor. */
-#else
-  FILE* fp;             /**< For non-posix. */
-#endif
-  uint32_t pos;         /**< position. */
-  uint32_t start;       /**< File start */
-  uint32_t end;         /**< File end. */
-} Packfile;
+struct Packfile_s;
+typedef struct Packfile_s Packfile_t;
 
 /* Packfile manipulation. Automatically allocated and freed (with open and close). */
 
 /* Basic. */
 int pack_check(const char* filename);
 int pack_files(const char* outfile, const char** infiles, const uint32_t nfiles);
-int pack_open(Packfile* file, const char* packfile, const char* filename);
-ssize_t pack_read(Packfile* file, void* buf, const size_t count);
-off_t pack_seek(Packfile* file, off_t offset, int whence);
-long pack_tell(Packfile* file);
-int pack_close(Packfile* file);
+Packfile_t* pack_open(const char* packfile, const char* filename);
+ssize_t pack_read(Packfile_t* file, void* buf, const size_t count);
+off_t pack_seek(Packfile_t* file, off_t offset, int whence);
+long pack_tell(Packfile_t* file);
+int pack_close(Packfile_t* file);
 
 /* Fancy stuff. */
 void* pack_readfile(const char* packfile, const char* filename, uint32_t* filesize);
diff --git a/src/pilot.c b/src/pilot.c
index 1897300..c4ff1fd 100644
--- a/src/pilot.c
+++ b/src/pilot.c
@@ -11,7 +11,7 @@
 #include "lephisto.h"
 #include "log.h"
 #include "weapon.h"
-#include "pack.h"
+#include "ldata.h"
 #include "lxml.h"
 #include "spfx.h"
 #include "rng.h"
@@ -1785,7 +1785,7 @@ static int fleet_parse(Fleet* tmp, const xmlNodePtr parent) {
 int fleet_load(void) {
   int mem;
   uint32_t bufsize;
-  char* buf = pack_readfile(DATA, FLEET_DATA, &bufsize);
+  char* buf = ldata_read(FLEET_DATA, &bufsize);
 
   xmlNodePtr node;
   xmlDocPtr doc = xmlParseMemory(buf, bufsize);
diff --git a/src/player.c b/src/player.c
index 6944c0a..eddaa7c 100644
--- a/src/player.c
+++ b/src/player.c
@@ -11,7 +11,7 @@
 #include "log.h"
 #include "opengl.h"
 #include "font.h"
-#include "pack.h"
+#include "ldata.h"
 #include "lxml.h"
 #include "space.h"
 #include "rng.h"
@@ -337,7 +337,7 @@ static int player_newMake(void) {
   sysname = NULL;
   player_mission = NULL;
 
-  buf = pack_readfile(DATA, START_DATA, &bufsize);
+  buf = ldata_read(START_DATA, &bufsize);
 
   xmlNodePtr node, cur, tmp;
   xmlDocPtr doc = xmlParseMemory(buf, bufsize);
@@ -1393,7 +1393,7 @@ int gui_init(void) {
  */
 int gui_load(const char* name) {
   uint32_t bufsize;
-  char* buf = pack_readfile(DATA, GUI_DATA, &bufsize);
+  char* buf = ldata_read(GUI_DATA, &bufsize);
   char* tmp;
   int found = 0;
 
diff --git a/src/save.c b/src/save.c
index 430df33..9bb4bdc 100644
--- a/src/save.c
+++ b/src/save.c
@@ -8,6 +8,7 @@
 #include "menu.h"
 #include "lfile.h"
 #include "hook.h"
+#include "ldata.h"
 #include "save.h"
 
 #define LOAD_WIDTH    400
@@ -70,7 +71,7 @@ int save_all(void) {
   /* Save the version or something.. */
   xmlw_startElem(writer, "version");
   xmlw_elem(writer, "lephisto", "%d.%d.%d", VMAJOR, VMINOR, VREV);
-  xmlw_elem(writer, "data", dataname);
+  xmlw_elem(writer, "data", ldata_name);
   xmlw_endElem(writer); /* Version. */
 
   if(save_data(writer) < 0) {
diff --git a/src/ship.c b/src/ship.c
index e349acc..0485822 100644
--- a/src/ship.c
+++ b/src/ship.c
@@ -3,7 +3,7 @@
 
 #include "lephisto.h"
 #include "log.h"
-#include "pack.h"
+#include "ldata.h"
 #include "lxml.h"
 #include "toolkit.h"
 #include "ship.h"
@@ -372,7 +372,7 @@ static int ship_parse(Ship* tmp, xmlNodePtr parent) {
 int ships_load(void) {
   int mem;
   uint32_t bufsize;
-  char* buf = pack_readfile(DATA, SHIP_DATA, &bufsize);
+  char* buf = ldata_read(SHIP_DATA, &bufsize);
 
   xmlNodePtr node;
   xmlDocPtr doc = xmlParseMemory(buf, bufsize);
diff --git a/src/sound.c b/src/sound.c
index b6bf2be..3061ff7 100644
--- a/src/sound.c
+++ b/src/sound.c
@@ -12,7 +12,7 @@
 
 #include "lephisto.h"
 #include "log.h"
-#include "pack.h"
+#include "ldata.h"
 #include "music.h"
 #include "physics.h"
 #include "sound.h"
@@ -434,7 +434,7 @@ static int sound_makeList(void) {
   if(sound_disabled) return 0;
 
   /* Get the file list. */
-  files = pack_listfiles(data, &nfiles);
+  files = ldata_list(SOUND_PREFIX, &nfiles);
 
   /* Load the profiles. */
   mem = 0;
@@ -463,11 +463,6 @@ static int sound_makeList(void) {
   /* Shrink to minimum ram usage. */
   sound_list = realloc(sound_list, sound_nlist*sizeof(alSound));
 
-  /* Free the char* allocated by pack. */
-  for(i = 0; i < nfiles; i++)
-    free(files[i]);
-  free(files);
-
   DEBUG("Loaded %d sound%s", sound_nlist, (sound_nlist==1)?"":"s");
 
   return 0;
@@ -503,7 +498,7 @@ static Mix_Chunk* sound_load(char* filename) {
   if(sound_disabled) return NULL;
 
   /* Get the file data buffer from the packfile. */
-  wavdata = pack_readfile(DATA, filename, &size);
+  wavdata = ldata_read(filename, &size);
   rw = SDL_RWFromMem(wavdata, size);
 
   /* Bind to OpenAL buffer. */
diff --git a/src/space.c b/src/space.c
index 8e5ed32..9364aa4 100644
--- a/src/space.c
+++ b/src/space.c
@@ -7,7 +7,7 @@
 #include "log.h"
 #include "physics.h"
 #include "rng.h"
-#include "pack.h"
+#include "ldata.h"
 #include "player.h"
 #include "pause.h"
 #include "weapon.h"
@@ -616,7 +616,7 @@ static int planets_load(void) {
   xmlNodePtr node;
   xmlDocPtr doc;
 
-  buf = pack_readfile(DATA, PLANET_DATA, &bufsize);
+  buf = ldata_read(PLANET_DATA, &bufsize);
   doc = xmlParseMemory(buf, bufsize);
 
   node = doc->xmlChildrenNode;
@@ -1135,7 +1135,7 @@ int space_load(void) {
  */
 static int systems_load(void) {
   uint32_t bufsize;
-  char* buf = pack_readfile(DATA, SYSTEM_DATA, &bufsize);
+  char* buf = ldata_read(SYSTEM_DATA, &bufsize);
 
   xmlNodePtr node;
   xmlDocPtr doc = xmlParseMemory(buf, bufsize);
diff --git a/src/unidiff.c b/src/unidiff.c
index 2a20eef..2ef6272 100644
--- a/src/unidiff.c
+++ b/src/unidiff.c
@@ -15,7 +15,7 @@
 #include "log.h"
 #include "lxml.h"
 #include "space.h"
-#include "pack.h"
+#include "ldata.h"
 #include "unidiff.h"
 
 #define CHUNK_SIZE    32                    /**< Size of chunk to allocate. */
@@ -153,7 +153,7 @@ int diff_apply(char* name) {
   if(diff_isApplied(name))
     return 0;
 
-  buf = pack_readfile(DATA, DIFF_DATA, &bufsize);
+  buf = ldata_read(DIFF_DATA, &bufsize);
   doc = xmlParseMemory(buf, bufsize);
 
   node = doc->xmlChildrenNode;