Strictify map cells

Also fix a small but major bug in map_randfreecell.

16 files changed, 224 insertions, 425 deletions

diff --git a/GNUmakefile b/GNUmakefile
index 9accaab..a8fe0f0 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -44,7 +44,7 @@ all: ${PROGS}
 most: ${MOSTPROGS}
 clean:
 	rm -rf ${PROGS} ${BUILD_DIR}/
-common: ${BUILD_DIR}/common/core.o ${BUILD_DIR}/common/db.o ${BUILD_DIR}/common/grfio.o ${BUILD_DIR}/common/lock.o ${BUILD_DIR}/common/md5calc.o ${BUILD_DIR}/common/mt_rand.o ${BUILD_DIR}/common/nullpo.o ${BUILD_DIR}/common/socket.o ${BUILD_DIR}/common/timer.o ${BUILD_DIR}/common/utils.o ${BUILD_DIR}/common/cxxstdio.o ${BUILD_DIR}/common/extract.o
+common: ${BUILD_DIR}/common/core.o ${BUILD_DIR}/common/db.o ${BUILD_DIR}/common/lock.o ${BUILD_DIR}/common/md5calc.o ${BUILD_DIR}/common/random.o ${BUILD_DIR}/common/nullpo.o ${BUILD_DIR}/common/socket.o ${BUILD_DIR}/common/timer.o ${BUILD_DIR}/common/utils.o ${BUILD_DIR}/common/cxxstdio.o ${BUILD_DIR}/common/extract.o
 
 # Top level programs
 login-server: ${BUILD_DIR}/login/login
@@ -62,7 +62,7 @@ eathena-monitor: ${BUILD_DIR}/tool/eathena-monitor
 ${BUILD_DIR}/char/char: ${BUILD_DIR}/char/char.o ${BUILD_DIR}/char/inter.o ${BUILD_DIR}/char/int_party.o ${BUILD_DIR}/char/int_storage.o ${BUILD_DIR}/common/core.o ${BUILD_DIR}/common/socket.o ${BUILD_DIR}/common/timer.o ${BUILD_DIR}/common/db.o ${BUILD_DIR}/common/lock.o ${BUILD_DIR}/common/random.o ${BUILD_DIR}/common/utils.o ${BUILD_DIR}/common/cxxstdio.o ${BUILD_DIR}/common/extract.o
 ${BUILD_DIR}/ladmin/ladmin: ${BUILD_DIR}/ladmin/ladmin.o ${BUILD_DIR}/common/md5calc.o ${BUILD_DIR}/common/core.o ${BUILD_DIR}/common/socket.o ${BUILD_DIR}/common/timer.o ${BUILD_DIR}/common/db.o ${BUILD_DIR}/common/random.o ${BUILD_DIR}/common/utils.o ${BUILD_DIR}/common/cxxstdio.o
 ${BUILD_DIR}/login/login: ${BUILD_DIR}/login/login.o ${BUILD_DIR}/common/core.o ${BUILD_DIR}/common/socket.o ${BUILD_DIR}/common/timer.o ${BUILD_DIR}/common/db.o ${BUILD_DIR}/common/lock.o ${BUILD_DIR}/common/random.o ${BUILD_DIR}/common/md5calc.o ${BUILD_DIR}/common/utils.o ${BUILD_DIR}/common/cxxstdio.o ${BUILD_DIR}/common/extract.o
-${BUILD_DIR}/map/map: ${BUILD_DIR}/map/map.o ${BUILD_DIR}/map/tmw.o ${BUILD_DIR}/map/magic-interpreter-lexer.o ${BUILD_DIR}/map/magic-interpreter-parser.o ${BUILD_DIR}/map/magic-interpreter-base.o ${BUILD_DIR}/map/magic-expr.o ${BUILD_DIR}/map/magic-stmt.o ${BUILD_DIR}/map/magic.o ${BUILD_DIR}/map/map.o ${BUILD_DIR}/map/chrif.o ${BUILD_DIR}/map/clif.o ${BUILD_DIR}/map/pc.o ${BUILD_DIR}/map/npc.o ${BUILD_DIR}/map/chat.o ${BUILD_DIR}/map/path.o ${BUILD_DIR}/map/itemdb.o ${BUILD_DIR}/map/mob.o ${BUILD_DIR}/map/script.o ${BUILD_DIR}/map/storage.o ${BUILD_DIR}/map/skill.o ${BUILD_DIR}/map/skill-pools.o ${BUILD_DIR}/map/atcommand.o ${BUILD_DIR}/map/battle.o ${BUILD_DIR}/map/intif.o ${BUILD_DIR}/map/trade.o ${BUILD_DIR}/map/party.o ${BUILD_DIR}/common/core.o ${BUILD_DIR}/common/socket.o ${BUILD_DIR}/common/timer.o ${BUILD_DIR}/common/grfio.o ${BUILD_DIR}/common/db.o ${BUILD_DIR}/common/lock.o ${BUILD_DIR}/common/nullpo.o ${BUILD_DIR}/common/random.o ${BUILD_DIR}/common/md5calc.o ${BUILD_DIR}/common/utils.o ${BUILD_DIR}/common/cxxstdio.o ${BUILD_DIR}/common/extract.o
+${BUILD_DIR}/map/map: ${BUILD_DIR}/map/map.o ${BUILD_DIR}/map/tmw.o ${BUILD_DIR}/map/magic-interpreter-lexer.o ${BUILD_DIR}/map/magic-interpreter-parser.o ${BUILD_DIR}/map/magic-interpreter-base.o ${BUILD_DIR}/map/magic-expr.o ${BUILD_DIR}/map/magic-stmt.o ${BUILD_DIR}/map/magic.o ${BUILD_DIR}/map/map.o ${BUILD_DIR}/map/chrif.o ${BUILD_DIR}/map/clif.o ${BUILD_DIR}/map/pc.o ${BUILD_DIR}/map/npc.o ${BUILD_DIR}/map/chat.o ${BUILD_DIR}/map/path.o ${BUILD_DIR}/map/itemdb.o ${BUILD_DIR}/map/mob.o ${BUILD_DIR}/map/script.o ${BUILD_DIR}/map/storage.o ${BUILD_DIR}/map/skill.o ${BUILD_DIR}/map/skill-pools.o ${BUILD_DIR}/map/atcommand.o ${BUILD_DIR}/map/battle.o ${BUILD_DIR}/map/intif.o ${BUILD_DIR}/map/trade.o ${BUILD_DIR}/map/party.o ${BUILD_DIR}/common/core.o ${BUILD_DIR}/common/socket.o ${BUILD_DIR}/common/timer.o ${BUILD_DIR}/map/grfio.o ${BUILD_DIR}/common/db.o ${BUILD_DIR}/common/lock.o ${BUILD_DIR}/common/nullpo.o ${BUILD_DIR}/common/random.o ${BUILD_DIR}/common/md5calc.o ${BUILD_DIR}/common/utils.o ${BUILD_DIR}/common/cxxstdio.o ${BUILD_DIR}/common/extract.o
 ${BUILD_DIR}/tool/eathena-monitor: ${BUILD_DIR}/tool/eathena-monitor.o
 
 # silence build warnings for code beyond my control
diff --git a/src/common/grfio.cpp b/src/common/grfio.cpp
deleted file mode 100644
index 1ed5c3e..0000000
--- a/src/common/grfio.cpp
+++ /dev/null
@@ -1,226 +0,0 @@
-// Reads .gat files by name-mapping .wlk files
-#include "grfio.hpp"
-
-#include <sys/stat.h>
-
-#include <cstdio>
-#include <cstring>
-
-#include "cxxstdio.hpp"
-#include "socket.hpp"
-#include "utils.hpp"
-
-#include "../poison.hpp"
-
-//----------------------------
-//  file entry table struct
-//----------------------------
-typedef struct
-{
-    size_t declen;
-    int16_t next; // next index into the filelist[] array, or -1
-    char fn[128 - 4 - 2];       // file name
-} FILELIST;
-
-#define FILELIST_LIMIT  32768   // limit to number of filelists - if you increase this, change all shorts to int
-#define FILELIST_ADDS   1024    // amount to increment when reallocing
-
-static
-FILELIST *filelist = NULL;
-/// Number of entries used
-static
-uint16_t filelist_entrys = 0;
-/// Number of FILELIST entries actually allocated
-static
-uint16_t filelist_maxentry = 0;
-
-/// First index of the given hash, into the filelist[] array
-#define l -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
-static
-int16_t filelist_hash[256] = {l,l,l,l,l,l,l,l,l,l,l,l,l,l,l,l};
-#undef l
-
-/// Hash a filename
-static
-uint8_t filehash(const char *fname)
-{
-    // Larger than the return type - upper bits are used in the process
-    uint32_t hash = 0;
-    while (*fname)
-    {
-        hash = (hash << 1) + (hash >> 7) * 9 + (unsigned char)*fname;
-        fname++;
-    }
-    return hash;
-}
-
-/// Find the filelist entry for the given filename, or NULL if it is not
-static
-FILELIST *filelist_find(const char *fname)
-{
-    int16_t index = filelist_hash[filehash(fname)];
-    while (index >= 0)
-    {
-        if (strcmp(filelist[index].fn, fname) == 0)
-            return &filelist[index];
-        index = filelist[index].next;
-    }
-    return NULL;
-}
-
-/// Copy a temporary entry into the hash map
-static
-FILELIST *filelist_add(FILELIST * entry)
-{
-    if (filelist_entrys >= FILELIST_LIMIT)
-    {
-        FPRINTF(stderr, "filelist limit : filelist_add\n");
-        exit(1);
-    }
-
-    if (filelist_entrys >= filelist_maxentry)
-    {
-        RECREATE(filelist, FILELIST, filelist_maxentry + FILELIST_ADDS);
-        memset(filelist + filelist_maxentry, '\0',
-                FILELIST_ADDS * sizeof(FILELIST));
-        filelist_maxentry += FILELIST_ADDS;
-    }
-
-    uint16_t new_index = filelist_entrys++;
-    uint8_t hash = filehash(entry->fn);
-    entry->next = filelist_hash[hash];
-    filelist_hash[hash] = new_index;
-
-    filelist[new_index] = *entry;
-
-    return &filelist[new_index];
-}
-
-static
-FILELIST *filelist_modify(FILELIST * entry)
-{
-    FILELIST *fentry = filelist_find(entry->fn);
-    if (fentry)
-    {
-        entry->next = fentry->next;
-        *fentry = *entry;
-        return fentry;
-    }
-    return filelist_add(entry);
-}
-
-/// Change fname data/*.gat to lfname data/*.wlk
-// TODO even if the file exists, don't keep reopening it every time one loads
-static
-void grfio_resnametable(const char *fname, char *lfname)
-{
-    char restable[] = "data/resnametable.txt";
-
-    FILE *fp = fopen_(restable, "rb");
-    if (fp == NULL)
-    {
-        FPRINTF(stderr, "No resnametable, can't look for %s\n", fname);
-        strcpy(lfname, fname);
-        char* ext = lfname + strlen(lfname) - 4;
-        if (!strcmp(ext, ".gat"))
-            strcpy(ext, ".wlk");
-        return;
-    }
-
-    char line[512];
-    while (fgets(line, sizeof(line), fp))
-    {
-        char w1[256], w2[256];
-        if (
-            // line is of the form foo.gat#foo.wlk#
-            (sscanf(line, "%[^#]#%[^#]#", w1, w2) == 2)
-            // strip data/ from foo.gat before comparing
-            && (!strcmp(w1, fname + 5)))
-        {
-            strcpy(lfname, "data/");
-            strcpy(lfname + 5, w2);
-            fclose_(fp);
-            return;
-        }
-    }
-    FPRINTF(stderr, "Unable to find resource: %s\n", fname);
-    fclose_(fp);
-
-    strcpy(lfname, fname);
-    char* ext = lfname + strlen(lfname) - 4;
-    if (!strcmp(ext, ".gat"))
-        strcpy(ext, ".wlk");
-    return;
-}
-
-/// Size of resource
-size_t grfio_size(const char *fname)
-{
-    FILELIST *entry = filelist_find(fname);
-    if (entry)
-        return entry->declen;
-
-    char lfname[256];
-    FILELIST lentry;
-    struct stat st;
-
-    grfio_resnametable(fname, lfname);
-
-    for (char *p = lfname; *p; p++)
-        if (*p == '\\')
-            *p = '/';
-
-    if (stat(lfname, &st) == 0)
-    {
-        strncpy(lentry.fn, fname, sizeof(lentry.fn) - 1);
-        lentry.declen = st.st_size;
-        entry = filelist_modify(&lentry);
-    }
-    else
-    {
-        PRINTF("%s not found\n", fname);
-        return 0;
-    }
-    return entry->declen;
-}
-
-void *grfio_reads(const char *fname, size_t *size)
-{
-    char lfname[256];
-    grfio_resnametable(fname, lfname);
-
-    for (char *p = &lfname[0]; *p != 0; p++)
-        if (*p == '\\')
-            *p = '/';       // * At the time of Unix
-
-    FILE *in = fopen_(lfname, "rb");
-    if (!in)
-    {
-        FPRINTF(stderr, "%s not found\n", fname);
-        return NULL;
-    }
-    FILELIST lentry;
-    FILELIST *entry = filelist_find(fname);
-    if (entry)
-    {
-        lentry.declen = entry->declen;
-    }
-    else
-    {
-        fseek(in, 0, SEEK_END);
-        lentry.declen = ftell(in);
-        fseek(in, 0, SEEK_SET);
-        strncpy(lentry.fn, fname, sizeof(lentry.fn) - 1);
-        entry = filelist_modify(&lentry);
-    }
-    uint8_t *buf2;
-    CREATE(buf2, uint8_t, lentry.declen + 1024);
-    if (fread(buf2, 1, lentry.declen, in) != lentry.declen)
-        exit(1);
-    fclose_(in);
-    in = NULL;
-
-    if (size)
-        *size = entry->declen;
-    return buf2;
-}
diff --git a/src/common/grfio.hpp b/src/common/grfio.hpp
deleted file mode 100644
index 7707b2b..0000000
--- a/src/common/grfio.hpp
+++ /dev/null
@@ -1,26 +0,0 @@
-#ifndef GRFIO_HPP
-#define GRFIO_HPP
-
-# include "sanity.hpp"
-
-/// Accessor to the .gat map virtual files
-// Note .gat files are mapped to .wlk files by data/resnametable.txt
-// Note that there currently is a 1-1 correlation between them,
-// but it is possible for a single .wlk to have multiple .gats reference it
-
-/// Load file into memory and possibly record length
-// For some reason, this allocates an extra 1024 bytes at the end
-void *grfio_reads(const char *resourcename, size_t *size);
-
-/// Load file into memory
-inline
-void *grfio_read(const char *resourcename)
-{
-    return grfio_reads(resourcename, NULL);
-}
-
-/// Get size of file
-// This is only called once, and that is to check the existence of a file.
-size_t grfio_size(const char *resourcename) __attribute__((deprecated));
-
-#endif // GRFIO_HPP
diff --git a/src/common/utils2.hpp b/src/common/utils2.hpp
index cdf2069..5f02beb 100644
--- a/src/common/utils2.hpp
+++ b/src/common/utils2.hpp
@@ -5,6 +5,7 @@
 
 #include <functional>
 #include <iterator>
+#include <memory>
 #include <type_traits>
 
 #ifdef __clang__
@@ -208,4 +209,22 @@ typename std::common_type<A, B>::type max(A a, B b)
     return b < a ? a : b;
 }
 
+template<class T>
+struct is_array_of_unknown_bound
+: std::is_same<T, typename std::remove_extent<T>::type[]>
+{};
+
+template<class T, class... A>
+typename std::enable_if<!is_array_of_unknown_bound<T>::value, std::unique_ptr<T>>::type make_unique(A&&... a)
+{
+    return std::unique_ptr<T>(new T(a...));
+}
+
+template<class T>
+typename std::enable_if<is_array_of_unknown_bound<T>::value, std::unique_ptr<T>>::type make_unique(size_t sz)
+{
+    typedef typename std::remove_extent<T>::type E;
+    return std::unique_ptr<E[]>(new E[sz]);
+}
+
 #endif // UTILS2_HPP
diff --git a/src/map/grfio.cpp b/src/map/grfio.cpp
new file mode 100644
index 0000000..a190d1b
--- /dev/null
+++ b/src/map/grfio.cpp
@@ -0,0 +1,72 @@
+// Reads .gat files by name-mapping .wlk files
+#include "grfio.hpp"
+
+#include <sys/stat.h>
+
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <cassert>
+#include <cstdio>
+#include <cstring>
+
+#include <fstream>
+#include <map>
+
+#include "../common/cxxstdio.hpp"
+#include "../common/extract.hpp"
+
+#include "../poison.hpp"
+
+static
+std::map<std::string, std::string> load_resnametable()
+{
+    std::ifstream in("data/resnametable.txt");
+    if (!in.is_open())
+    {
+        fprintf(stderr, "Missing data/resnametable.txt");
+        abort();
+    }
+    std::map<std::string, std::string> out;
+
+    std::string line;
+    while (std::getline(in, line))
+    {
+        std::string key, value;
+        if (!extract(line,
+                    record<'#'>(&key, &value)))
+            continue;
+        out[key] = value;
+    }
+    return out;
+}
+
+/// Change *.gat to *.wlk
+static
+std::string grfio_resnametable(const_string rname)
+{
+    static
+    std::map<std::string, std::string> resnametable = load_resnametable();
+
+    return resnametable.at(std::string(rname.begin(), rname.end()));
+}
+
+std::vector<uint8_t> grfio_reads(const_string rname)
+{
+    std::string lfname = "data/" + grfio_resnametable(rname);
+
+    int fd = open(lfname.c_str(), O_RDONLY);
+    if (fd == -1)
+    {
+        FPRINTF(stderr, "Resource %s (file %s) not found\n",
+                std::string(rname.begin(), rname.end()), lfname);
+        return {};
+    }
+    off_t len = lseek(fd, 0, SEEK_END);
+    assert (len != -1);
+    std::vector<uint8_t> buffer(len);
+    int err = pread(fd, buffer.data(), len, 0);
+    assert (err == len);
+    close(fd);
+    return buffer;
+}
diff --git a/src/map/grfio.hpp b/src/map/grfio.hpp
new file mode 100644
index 0000000..fd7b871
--- /dev/null
+++ b/src/map/grfio.hpp
@@ -0,0 +1,15 @@
+#ifndef GRFIO_HPP
+#define GRFIO_HPP
+
+#include <cstdint>
+
+#include <vector>
+
+#include "../common/const_array.hpp"
+
+/// Load a resource into memory, subject to data/resnametable.txt.
+/// Normally, resourcename is xxx-y.gat and the file is xxx-y.wlk.
+/// Currently there is exactly one .wlk per .gat, but multiples are fine.
+std::vector<uint8_t> grfio_reads(const_string resourcename);
+
+#endif // GRFIO_HPP
diff --git a/src/map/magic-expr.cpp b/src/map/magic-expr.cpp
index ea853a1..a366cc0 100644
--- a/src/map/magic-expr.cpp
+++ b/src/map/magic-expr.cpp
@@ -14,11 +14,6 @@
 
 #include "../poison.hpp"
 
-bool map_is_solid(int m, int x, int y)
-{
-    return map_getcell(m, x, y) == 1;
-}
-
 static
 void free_area(area_t *area)
 {
@@ -850,7 +845,9 @@ int fun_awayfrom(env_t *, int, val_t *result, val_t *args)
     int dx = dirx[ARGDIR(1)];
     int dy = diry[ARGDIR(1)];
     int distance = ARGINT(2);
-    while (distance-- && !map_is_solid(loc->m, loc->x + dx, loc->y + dy))
+    while (distance--
+        && !bool(read_gat(loc->m, loc->x + dx, loc->y + dy)
+            & MapCell::UNWALKABLE))
     {
         loc->x += dx;
         loc->y += dy;
diff --git a/src/map/magic-expr.hpp b/src/map/magic-expr.hpp
index e7f27dc..419c833 100644
--- a/src/map/magic-expr.hpp
+++ b/src/map/magic-expr.hpp
@@ -60,8 +60,6 @@ int magic_eval_int(env_t *env, expr_t *expr);
  */
 char *magic_eval_str(env_t *env, expr_t *expr);
 
-bool map_is_solid(int m, int x, int y);
-
 expr_t *magic_new_expr(EXPR ty);
 
 void magic_clear_var(val_t *v);
diff --git a/src/map/magic-stmt.cpp b/src/map/magic-stmt.cpp
index c729cfd..8058310 100644
--- a/src/map/magic-stmt.cpp
+++ b/src/map/magic-stmt.cpp
@@ -480,7 +480,7 @@ int op_move(env_t *, int, val_t *args)
     int newx = subject->x + dirx[dir];
     int newy = subject->y + diry[dir];
 
-    if (!map_is_solid(subject->m, newx, newy))
+    if (!bool(map_getcell(subject->m, newx, newy) & MapCell::UNWALKABLE))
         entity_warp(subject, subject->m, newx, newy);
 
     return 0;
diff --git a/src/map/map.cpp b/src/map/map.cpp
index d7cf4f6..65fdc38 100644
--- a/src/map/map.cpp
+++ b/src/map/map.cpp
@@ -6,6 +6,7 @@
 #include <netdb.h>
 #include <unistd.h>
 
+#include <cassert>
 #include <cstdlib>
 #include <cstring>
 
@@ -14,7 +15,6 @@
 #include "../common/core.hpp"
 #include "../common/cxxstdio.hpp"
 #include "../common/db.hpp"
-#include "../common/grfio.hpp"
 #include "../common/random2.hpp"
 #include "../common/nullpo.hpp"
 #include "../common/socket.hpp"
@@ -25,6 +25,7 @@
 #include "chat.hpp"
 #include "chrif.hpp"
 #include "clif.hpp"
+#include "grfio.hpp"
 #include "itemdb.hpp"
 #include "magic.hpp"
 #include "mob.hpp"
@@ -776,7 +777,7 @@ std::pair<uint16_t, uint16_t> map_randfreecell(int m, uint16_t x, uint16_t y, ui
     {
         int dx = itr % w;
         int dy = itr / w;
-        if (read_gat(m, x + dx, y + dy) == 1)
+        if (!bool(read_gat(m, x + dx, y + dy) & MapCell::UNWALKABLE))
             return {static_cast<uint16_t>(x + dx), static_cast<uint16_t>(y + dy)};
     }
     return {static_cast<uint16_t>(0), static_cast<uint16_t>(0)};
@@ -1347,10 +1348,10 @@ DIR map_calc_dir(struct block_list *src, int x, int y)
  * (m,x,y)の状態を調べる
  *------------------------------------------
  */
-int map_getcell(int m, int x, int y)
+MapCell map_getcell(int m, int x, int y)
 {
     if (x < 0 || x >= map[m].xs - 1 || y < 0 || y >= map[m].ys - 1)
-        return 1;
+        return MapCell::UNWALKABLE;
     return map[m].gat[x + y * map[m].xs];
 }
 
@@ -1358,11 +1359,11 @@ int map_getcell(int m, int x, int y)
  * (m,x,y)の状態をtにする
  *------------------------------------------
  */
-int map_setcell(int m, int x, int y, int t)
+void map_setcell(int m, int x, int y, MapCell t)
 {
     if (x < 0 || x >= map[m].xs || y < 0 || y >= map[m].ys)
-        return t;
-    return map[m].gat[x + y * map[m].xs] = t;
+        return;
+    map[m].gat[x + y * map[m].xs] = t;
 }
 
 /*==========================================
@@ -1404,46 +1405,28 @@ int map_setipport(const char *name, struct in_addr ip, int port)
     return 0;
 }
 
-// 初期化周り
-/*==========================================
- * 水場高さ設定
- *------------------------------------------
- */
-static
-struct Waterlist
-{
-    char mapname[24];
-    int waterheight;
-}   *waterlist = NULL;
-
 /*==========================================
  * マップ1枚読み込み
  *------------------------------------------
  */
 static
-int map_readmap(int m, const char *fn, char *)
+bool map_readmap(int m, const_string fn)
 {
-    int s;
-    int x, y, xs, ys;
-    struct gat_1cell
-    {
-        char type;
-    }   *p;
-    size_t size;
-
     // read & convert fn
-    uint8_t *gat = (uint8_t *)grfio_read(fn);
-    if (gat == NULL)
-        return -1;
+    std::vector<uint8_t> gat_v = grfio_reads(fn);
+    if (gat_v.empty())
+        return false;
+    size_t s = gat_v.size() - 4;
 
-    PRINTF("\rLoading Maps [%d/%d]: %-50s  ", m, map_num, fn);
+    map[m].m = m;
+    int xs = map[m].xs = gat_v[0] | gat_v[1] << 8;
+    int ys = map[m].ys = gat_v[2] | gat_v[3] << 8;
+    PRINTF("\rLoading Maps [%d/%d]: %-30s  (%i, %i)",
+            m, map_num, std::string(fn.begin(), fn.end()), xs, ys);
     fflush(stdout);
 
-    map[m].m = m;
-    xs = map[m].xs = *(short *)(gat);
-    ys = map[m].ys = *(short *)(gat + 2);
-    PRINTF("\n%i %i\n", xs, ys);
-    map[m].gat = (uint8_t *)calloc(s = map[m].xs * map[m].ys, 1);
+    assert (s == xs * ys);
+    map[m].gat = make_unique<MapCell[]>(s);
     if (map[m].gat == NULL)
     {
         PRINTF("out of memory : map_readmap gat\n");
@@ -1455,39 +1438,21 @@ int map_readmap(int m, const char *fn, char *)
     memset(&map[m].flag, 0, sizeof(map[m].flag));
     if (battle_config.pk_mode)
         map[m].flag.pvp = 1;    // make all maps pvp for pk_mode [Valaris]
-    for (y = 0; y < ys; y++)
-    {
-        p = (struct gat_1cell *)(gat + y * xs + 4);
-        for (x = 0; x < xs; x++)
-        {
-            /*if (wh!=NO_WATER && p->type==0){
-             * // 水場判定
-             * map[m].gat[x+y*xs]= (p->high[0]>wh || p->high[1]>wh || p->high[2]>wh || p->high[3]>wh) ? 3 : 0;
-             * } else { */
-            map[m].gat[x + y * xs] = p->type;
-            //}
-            p++;
-        }
-    }
-    free(gat);
+    MapCell *gat_m = reinterpret_cast<MapCell *>(&gat_v[4]);
+    std::copy(gat_m, gat_m + s, &map[m].gat[0]);
 
     map[m].bxs = (xs + BLOCK_SIZE - 1) / BLOCK_SIZE;
     map[m].bys = (ys + BLOCK_SIZE - 1) / BLOCK_SIZE;
-    size = map[m].bxs * map[m].bys;
+    size_t size = map[m].bxs * map[m].bys;
 
     CREATE(map[m].block, struct block_list *, size);
-
     CREATE(map[m].block_mob, struct block_list *, size);
-
     CREATE(map[m].block_count, int, size);
-
     CREATE(map[m].block_mob_count, int, size);
 
     strdb_insert(map_db, map[m].name, &map[m]);
 
-//  PRINTF("%s read done\n",fn);
-
-    return 0;
+    return true;
 }
 
 /*==========================================
@@ -1499,42 +1464,12 @@ int map_readallmap(void)
 {
     int i, maps_removed = 0;
 
-    // 先に全部のャbプの存在を確認
-    for (i = 0; i < map_num; i++)
-    {
-        if (strstr(map[i].name, ".gat") == NULL)
-            continue;
-        // TODO replace this
-        std::string fn = STRPRINTF("data\\%s", map[i].name);
-        // TODO - remove this, it is the last call to grfio_size, which is deprecated
-        if (!grfio_size(fn.c_str()))
-        {
-            map_delmap(map[i].name);
-            maps_removed++;
-        }
-    }
     for (i = 0; i < map_num; i++)
     {
-        if (strstr(map[i].name, ".gat") != NULL)
+        assert (strstr(map[i].name, ".gat") != NULL);
         {
-            char *p = strstr(map[i].name, ">");    // [MouseJstr]
-            if (p != NULL)
-            {
-                char alias[64];
-                *p = '\0';
-                strcpy(alias, map[i].name);
-                strcpy(map[i].name, p + 1);
-                std::string fn = STRPRINTF("data\\%s", map[i].name);
-                if (map_readmap(i, fn.c_str(), alias) == -1)
-                {
-                    map_delmap(map[i].name);
-                    maps_removed++;
-                }
-            }
-            else
             {
-                std::string fn = STRPRINTF("data\\%s", map[i].name);
-                if (map_readmap(i, fn.c_str(), NULL) == -1)
+                if (!map_readmap(i, map[i].name))
                 {
                     map_delmap(map[i].name);
                     maps_removed++;
@@ -1543,7 +1478,6 @@ int map_readallmap(void)
         }
     }
 
-    free(waterlist);
     PRINTF("\rMaps Loaded: %d %60s\n", map_num, "");
     PRINTF("\rMaps Removed: %d \n", maps_removed);
     return 0;
@@ -1856,8 +1790,7 @@ void term_func(void)
 
     for (i = 0; i <= map_num; i++)
     {
-        if (map[i].gat)
-            free(map[i].gat);
+        map[i].gat = nullptr;
         if (map[i].block)
             free(map[i].block);
         if (map[i].block_mob)
diff --git a/src/map/map.hpp b/src/map/map.hpp
index 72ded63..29680a6 100644
--- a/src/map/map.hpp
+++ b/src/map/map.hpp
@@ -398,7 +398,8 @@ struct map_data
 {
     char name[24];
     char alias[24];             // [MouseJstr]
-    unsigned char *gat;         // NULLなら下のmap_data_other_serverとして扱う
+    // if NULL, actually a map_data_other_server
+    std::unique_ptr<MapCell[]> gat;
     struct block_list **block;
     struct block_list **block_mob;
     int *block_count, *block_mob_count;
@@ -455,12 +456,12 @@ extern struct map_data map[];
 extern int map_num;
 
 inline
-uint8_t read_gatp(struct map_data *m, int x, int y)
+MapCell read_gatp(struct map_data *m, int x, int y)
 {
     return m->gat[x + y * m->xs];
 }
 inline
-uint8_t read_gat(int m, int x, int y)
+MapCell read_gat(int m, int x, int y)
 {
     return read_gatp(&map[m], x, y);
 }
@@ -584,8 +585,8 @@ struct map_session_data *map_get_prev_session(
         struct map_session_data *current);
 
 // gat関連
-int map_getcell(int, int, int);
-int map_setcell(int, int, int, int);
+MapCell map_getcell(int, int, int);
+void map_setcell(int, int, int, MapCell);
 
 // その他
 bool map_check_dir(DIR s_dir, DIR t_dir);
diff --git a/src/map/map.t.hpp b/src/map/map.t.hpp
index 09444fd..c57ea06 100644
--- a/src/map/map.t.hpp
+++ b/src/map/map.t.hpp
@@ -542,4 +542,19 @@ ENUM_BITWISE_OPERATORS(MobMode)
 }
 using e::MobMode;
 
+namespace e
+{
+enum class MapCell : uint8_t
+{
+    // the usual thing
+    UNWALKABLE  = 0x01,
+    // not in tmwa data
+    _range      = 0x04,
+    // set in code, not imported
+    NPC_NEAR    = 0x80,
+};
+ENUM_BITWISE_OPERATORS(MapCell)
+}
+using e::MapCell;
+
 #endif // MAP_T_HPP
diff --git a/src/map/mob.cpp b/src/map/mob.cpp
index 80671c2..79a21ea 100644
--- a/src/map/mob.cpp
+++ b/src/map/mob.cpp
@@ -435,7 +435,7 @@ int mob_once_spawn_area(struct map_session_data *sd, const char *mapname,
                          const char *mobname, int mob_class, int amount,
                          const char *event)
 {
-    int x, y, i, c, max, lx = -1, ly = -1, id = 0;
+    int x, y, i, max, lx = -1, ly = -1, id = 0;
     int m;
 
     if (strcmp(mapname, "this") == 0)
@@ -458,7 +458,8 @@ int mob_once_spawn_area(struct map_session_data *sd, const char *mapname,
             x = random_::in(x0, x1);
             y = random_::in(y0, y1);
         }
-        while (((c = map_getcell(m, x, y)) == 1 || c == 5) && (++j) < max);
+        while (bool(map_getcell(m, x, y) & MapCell::UNWALKABLE)
+             && (++j) < max);
         if (j >= max)
         {
             if (lx >= 0)
@@ -570,7 +571,6 @@ static
 int mob_walk(struct mob_data *md, tick_t tick, unsigned char data)
 {
     int moveblock;
-    int ctype;
     int x, y, dx, dy;
 
     nullpo_ret(md);
@@ -597,8 +597,7 @@ int mob_walk(struct mob_data *md, tick_t tick, unsigned char data)
 
         x = md->bl.x;
         y = md->bl.y;
-        ctype = map_getcell(md->bl.m, x, y);
-        if (ctype == 1 || ctype == 5)
+        if (bool(map_getcell(md->bl.m, x, y) & MapCell::UNWALKABLE))
         {
             mob_stop_walking(md, 1);
             return 0;
@@ -607,8 +606,8 @@ int mob_walk(struct mob_data *md, tick_t tick, unsigned char data)
         dx = dirx[md->dir];
         dy = diry[md->dir];
 
-        ctype = map_getcell(md->bl.m, x + dx, y + dy);
-        if (ctype == 1 || ctype == 5)
+        if (bool(map_getcell(md->bl.m, x + dx, y + dy)
+                & MapCell::UNWALKABLE))
         {
             mob_walktoxy_sub(md);
             return 0;
@@ -1056,7 +1055,7 @@ int mob_setdelayspawn(int id)
  */
 int mob_spawn(int id)
 {
-    int x = 0, y = 0, c;
+    int x = 0, y = 0;
     tick_t tick = gettick();
     struct mob_data *md;
     struct block_list *bl;
@@ -1098,7 +1097,8 @@ int mob_spawn(int id)
             }
             i++;
         }
-        while (((c = map_getcell(md->bl.m, x, y)) == 1 || c == 5) && i < 50);
+        while (bool(map_getcell(md->bl.m, x, y) & MapCell::UNWALKABLE)
+            && i < 50);
 
         if (i >= 50)
         {
@@ -1698,8 +1698,7 @@ int mob_randomwalk(struct mob_data *md, tick_t tick)
             // Search of a movable place
             x = md->bl.x + random_::in(-d, d);
             y = md->bl.y + random_::in(-d, d);
-            uint8_t c = map_getcell(md->bl.m, x, y);
-            if (c != 1 && c != 5
+            if (!bool(map_getcell(md->bl.m, x, y) & MapCell::UNWALKABLE)
                 && mob_walktoxy(md, x, y, 1) == 0)
             {
                 md->move_fail_count = 0;
@@ -2784,7 +2783,7 @@ int mob_warpslave(struct mob_data *md, int x, int y)
  */
 int mob_warp(struct mob_data *md, int m, int x, int y, BeingRemoveWhy type)
 {
-    int i = 0, c, xs = 0, ys = 0, bx = x, by = y;
+    int i = 0, xs = 0, ys = 0, bx = x, by = y;
 
     nullpo_ret(md);
 
@@ -2807,8 +2806,10 @@ int mob_warp(struct mob_data *md, int m, int x, int y, BeingRemoveWhy type)
         xs = ys = 9;
     }
 
-    while ((x < 0 || y < 0 || ((c = read_gat(m, x, y)) == 1 || c == 5))
-           && (i++) < 1000)
+    while ((x < 0
+            || y < 0
+            || bool(read_gat(m, x, y) & MapCell::UNWALKABLE))
+       && (i++) < 1000)
     {
         if (xs > 0 && ys > 0 && i < 250)
         {
@@ -2924,7 +2925,7 @@ int mob_summonslave(struct mob_data *md2, int *value, int amount, int flag)
             continue;
         for (; amount > 0; amount--)
         {
-            int x = 0, y = 0, c = 0, i = 0;
+            int x = 0, y = 0, i = 0;
             md = (struct mob_data *) calloc(1, sizeof(struct mob_data));
             if (bool(mob_db[mob_class].mode & MobMode::LOOTER))
                 md->lootitem = (struct item *)
@@ -2932,8 +2933,10 @@ int mob_summonslave(struct mob_data *md2, int *value, int amount, int flag)
             else
                 md->lootitem = NULL;
 
-            while ((x <= 0 || y <= 0 || (c = map_getcell(m, x, y)) == 1
-                    || c == 5) && (i++) < 100)
+            while ((x <= 0
+                    || y <= 0
+                    || bool(map_getcell(m, x, y) & MapCell::UNWALKABLE))
+                && (i++) < 100)
             {
                 x = bx + random_::in(-4, 4);
                 y = by + random_::in(-4, 4);
diff --git a/src/map/npc.cpp b/src/map/npc.cpp
index 610a274..b65c263 100644
--- a/src/map/npc.cpp
+++ b/src/map/npc.cpp
@@ -1014,11 +1014,14 @@ int npc_parse_warp(const char *w1, const char *, const char *w3, const char *w4)
     {
         for (j = 0; j < xs; j++)
         {
-            int t;
-            t = map_getcell(m, x - xs / 2 + j, y - ys / 2 + i);
-            if (t == 1 || t == 5)
+            int x_lo = x - xs / 2;
+            int y_lo = y - ys / 2;
+            int xc = x_lo + j;
+            int yc = y_lo + i;
+            MapCell t = map_getcell(m, xc, yc);
+            if (bool(t & MapCell::UNWALKABLE))
                 continue;
-            map_setcell(m, x - xs / 2 + j, y - ys / 2 + i, t | 0x80);
+            map_setcell(m, xc, yc, t | MapCell::NPC_NEAR);
         }
     }
 
@@ -1317,11 +1320,14 @@ int npc_parse_script(char *w1, char *w2, char *w3, char *w4,
             {
                 for (j = 0; j < xs; j++)
                 {
-                    int t;
-                    t = map_getcell(m, x - xs / 2 + j, y - ys / 2 + i);
-                    if (t == 1 || t == 5)
+                    int x_lo = x - xs / 2;
+                    int y_lo = y - ys / 2;
+                    int xc = x_lo + j;
+                    int yc = y_lo + i;
+                    MapCell t = map_getcell(m, xc, yc);
+                    if (bool(t & MapCell::UNWALKABLE))
                         continue;
-                    map_setcell(m, x - xs / 2 + j, y - ys / 2 + i, t | 0x80);
+                    map_setcell(m, xc, yc, t | MapCell::NPC_NEAR);
                 }
             }
         }
diff --git a/src/map/path.cpp b/src/map/path.cpp
index 9c6ea28..7a8eb37 100644
--- a/src/map/path.cpp
+++ b/src/map/path.cpp
@@ -182,19 +182,11 @@ int add_path(int *heap, struct tmp_path *tp, int x, int y, int dist,
  *------------------------------------------
  */
 static
-int can_place(struct map_data *m, int x, int y, int flag)
+bool can_place(struct map_data *m, int x, int y)
 {
-    int c;
-
     nullpo_ret(m);
 
-    c = read_gatp(m, x, y);
-
-    if (c == 1)
-        return 0;
-    if (!(flag & 0x10000) && c == 5)
-        return 0;
-    return 1;
+    return !bool(read_gatp(m, x, y) & MapCell::UNWALKABLE);
 }
 
 /*==========================================
@@ -202,7 +194,7 @@ int can_place(struct map_data *m, int x, int y, int flag)
  *------------------------------------------
  */
 static
-int can_move(struct map_data *m, int x0, int y0, int x1, int y1, int flag)
+int can_move(struct map_data *m, int x0, int y0, int x1, int y1)
 {
     nullpo_ret(m);
 
@@ -210,13 +202,13 @@ int can_move(struct map_data *m, int x0, int y0, int x1, int y1, int flag)
         return 0;
     if (x1 < 0 || y1 < 0 || x1 >= m->xs || y1 >= m->ys)
         return 0;
-    if (!can_place(m, x0, y0, flag))
+    if (!can_place(m, x0, y0))
         return 0;
-    if (!can_place(m, x1, y1, flag))
+    if (!can_place(m, x1, y1))
         return 0;
     if (x0 == x1 || y0 == y1)
         return 1;
-    if (!can_place(m, x0, y1, flag) || !can_place(m, x1, y0, flag))
+    if (!can_place(m, x0, y1) || !can_place(m, x1, y0))
         return 0;
     return 1;
 }
@@ -239,7 +231,7 @@ int path_search(struct walkpath_data *wpd, int m, int x0, int y0, int x1, int y1
         return -1;
     md = &map[m];
     if (x1 < 0 || x1 >= md->xs || y1 < 0 || y1 >= md->ys
-        || (i = read_gatp(md, x1, y1)) == 1 || i == 5)
+        || bool(read_gatp(md, x1, y1) & MapCell::UNWALKABLE))
         return -1;
 
     // easy
@@ -251,7 +243,7 @@ int path_search(struct walkpath_data *wpd, int m, int x0, int y0, int x1, int y1
             return -1;
         if (x != x1 && y != y1)
         {
-            if (!can_move(md, x, y, x + dx, y + dy, flag))
+            if (!can_move(md, x, y, x + dx, y + dy))
                 break;
             x += dx;
             y += dy;
@@ -261,14 +253,14 @@ int path_search(struct walkpath_data *wpd, int m, int x0, int y0, int x1, int y1
         }
         else if (x != x1)
         {
-            if (!can_move(md, x, y, x + dx, y, flag))
+            if (!can_move(md, x, y, x + dx, y))
                 break;
             x += dx;
             wpd->path[i++] = (dx < 0) ? DIR::W : DIR::E;
         }
         else
         {                       // y!=y1
-            if (!can_move(md, x, y, x, y + dy, flag))
+            if (!can_move(md, x, y, x, y + dy))
                 break;
             y += dy;
             wpd->path[i++] = (dy > 0) ? DIR::S : DIR::N;
@@ -321,21 +313,21 @@ int path_search(struct walkpath_data *wpd, int m, int x0, int y0, int x1, int y1
 
             return 0;
         }
-        if (can_move(md, x, y, x + 1, y - 1, flag))
+        if (can_move(md, x, y, x + 1, y - 1))
             e += add_path(heap, tp, x + 1, y - 1, tp[rp].dist + 14, DIR::NE, rp, x1, y1);
-        if (can_move(md, x, y, x + 1, y, flag))
+        if (can_move(md, x, y, x + 1, y))
             e += add_path(heap, tp, x + 1, y, tp[rp].dist + 10, DIR::E, rp, x1, y1);
-        if (can_move(md, x, y, x + 1, y + 1, flag))
+        if (can_move(md, x, y, x + 1, y + 1))
             e += add_path(heap, tp, x + 1, y + 1, tp[rp].dist + 14, DIR::SE, rp, x1, y1);
-        if (can_move(md, x, y, x, y + 1, flag))
+        if (can_move(md, x, y, x, y + 1))
             e += add_path(heap, tp, x, y + 1, tp[rp].dist + 10, DIR::S, rp, x1, y1);
-        if (can_move(md, x, y, x - 1, y + 1, flag))
+        if (can_move(md, x, y, x - 1, y + 1))
             e += add_path(heap, tp, x - 1, y + 1, tp[rp].dist + 14, DIR::SW, rp, x1, y1);
-        if (can_move(md, x, y, x - 1, y, flag))
+        if (can_move(md, x, y, x - 1, y))
             e += add_path(heap, tp, x - 1, y, tp[rp].dist + 10, DIR::W, rp, x1, y1);
-        if (can_move(md, x, y, x - 1, y - 1, flag))
+        if (can_move(md, x, y, x - 1, y - 1))
             e += add_path(heap, tp, x - 1, y - 1, tp[rp].dist + 14, DIR::NW, rp, x1, y1);
-        if (can_move(md, x, y, x, y - 1, flag))
+        if (can_move(md, x, y, x, y - 1))
             e += add_path(heap, tp, x, y - 1, tp[rp].dist + 10, DIR::N, rp, x1, y1);
         tp[rp].flag = 1;
         if (e || heap[0] >= MAX_HEAP - 5)
diff --git a/src/map/pc.cpp b/src/map/pc.cpp
index 4eb49e3..8a4a98f 100644
--- a/src/map/pc.cpp
+++ b/src/map/pc.cpp
@@ -2364,7 +2364,7 @@ int pc_setpos(struct map_session_data *sd, const char *mapname_org, int x, int y
        BeingRemoveWhy clrtype)
 {
     char mapname[24];
-    int m = 0, c = 0;
+    int m = 0;
 
     nullpo_ret(sd);
 
@@ -2432,7 +2432,8 @@ int pc_setpos(struct map_session_data *sd, const char *mapname_org, int x, int y
 
     if (x < 0 || x >= map[m].xs || y < 0 || y >= map[m].ys)
         x = y = 0;
-    if ((x == 0 && y == 0) || (c = read_gat(m, x, y)) == 1 || c == 5)
+    if ((x == 0 && y == 0)
+        || bool(read_gat(m, x, y) & MapCell::UNWALKABLE))
     {
         if (x || y)
         {
@@ -2444,7 +2445,7 @@ int pc_setpos(struct map_session_data *sd, const char *mapname_org, int x, int y
             x = random_::in(1, map[m].xs - 2);
             y = random_::in(1, map[m].ys - 2);
         }
-        while ((c = read_gat(m, x, y)) == 1 || c == 5);
+        while (bool(read_gat(m, x, y) & MapCell::UNWALKABLE));
     }
 
     if (sd->mapname[0] && sd->bl.prev != NULL)
@@ -2477,7 +2478,7 @@ int pc_setpos(struct map_session_data *sd, const char *mapname_org, int x, int y
  */
 int pc_randomwarp(struct map_session_data *sd, BeingRemoveWhy type)
 {
-    int x, y, c, i = 0;
+    int x, y, i = 0;
     int m;
 
     nullpo_ret(sd);
@@ -2492,7 +2493,8 @@ int pc_randomwarp(struct map_session_data *sd, BeingRemoveWhy type)
         x = random_::in(1, map[m].xs - 2);
         y = random_::in(1, map[m].ys - 2);
     }
-    while (((c = read_gat(m, x, y)) == 1 || c == 5) && (i++) < 1000);
+    while (bool(read_gat(m, x, y) & MapCell::UNWALKABLE)
+        && (i++) < 1000);
 
     if (i < 1000)
         pc_setpos(sd, map[m].name, x, y, type);
@@ -2550,7 +2552,6 @@ static
 void pc_walk(TimerData *tid, tick_t tick, int id, unsigned char data)
 {
     struct map_session_data *sd;
-    int ctype;
     int moveblock;
     int x, y, dx, dy;
 
@@ -2581,8 +2582,7 @@ void pc_walk(TimerData *tid, tick_t tick, int id, unsigned char data)
 
         x = sd->bl.x;
         y = sd->bl.y;
-        ctype = map_getcell(sd->bl.m, x, y);
-        if (ctype == 1 || ctype == 5)
+        if (bool(map_getcell(sd->bl.m, x, y) & MapCell::UNWALKABLE))
         {
             pc_stop_walking(sd, 1);
             return;
@@ -2590,8 +2590,8 @@ void pc_walk(TimerData *tid, tick_t tick, int id, unsigned char data)
         sd->dir = sd->head_dir = sd->walkpath.path[sd->walkpath.path_pos];
         dx = dirx[sd->dir];
         dy = diry[sd->dir];
-        ctype = map_getcell(sd->bl.m, x + dx, y + dy);
-        if (ctype == 1 || ctype == 5)
+        if (bool(map_getcell(sd->bl.m, x + dx, y + dy)
+                & MapCell::UNWALKABLE))
         {
             pc_walktoxy_sub(sd);
             return;
@@ -2648,7 +2648,7 @@ void pc_walk(TimerData *tid, tick_t tick, int id, unsigned char data)
                 break;
             }
 
-        if (map_getcell(sd->bl.m, x, y) & 0x80)
+        if (bool(map_getcell(sd->bl.m, x, y) & MapCell::NPC_NEAR))
             npc_touch_areanpc(sd, sd->bl.m, x, y);
         else
             sd->areanpc_id = 0;
@@ -2756,7 +2756,7 @@ int pc_stop_walking(struct map_session_data *sd, int type)
 
 void pc_touch_all_relevant_npcs(struct map_session_data *sd)
 {
-    if (map_getcell(sd->bl.m, sd->bl.x, sd->bl.y) & 0x80)
+    if (bool(map_getcell(sd->bl.m, sd->bl.x, sd->bl.y) & MapCell::NPC_NEAR))
         npc_touch_areanpc(sd, sd->bl.m, sd->bl.x, sd->bl.y);
     else
         sd->areanpc_id = 0;