--- a/src/dmres.c	Thu Dec 08 15:56:36 2022 +0200
+++ b/src/dmres.c	Thu Dec 08 15:59:22 2022 +0200
@@ -252,7 +252,7 @@
 }
 
 
-static BOOL dm_stdio_feof(DMResource *fh)
+static bool dm_stdio_feof(DMResource *fh)
 {
     return feof(fh->fh);
 }
@@ -375,7 +375,7 @@
     int ret = DMERR_OK, zret, cdataLeft;
     Uint8 * cbuffer = NULL;
     z_stream zstr;
-    BOOL zinit = FALSE;
+    bool zinit = false;
 
     // Allocate a structures and buffers
     if ((cbuffer = dmMalloc(DMRES_TMPBUF_SIZE)) == NULL)
@@ -396,7 +396,7 @@
             "Could not initialize zlib stream decompression.\n");
         goto out;
     }
-    zinit = TRUE;
+    zinit = true;
 
     // Uncompress the data
     while (cdataLeft > 0 && zstr.avail_out > 0 && zret == Z_OK)
@@ -451,10 +451,10 @@
     zctx.inBufferEnd  = inBuf + node->csize;
     zctx.outBuffer    = zctx.outBufferStart = handle->memData;
     zctx.outBufferEnd = handle->memData + node->size;
-    zctx.expandable   = FALSE;
+    zctx.expandable   = false;
 
     // Attempt decompression
-    if ((ret = dmZLibParseHeader(&zctx, TRUE)) != DMERR_OK)
+    if ((ret = dmZLibParseHeader(&zctx, true)) != DMERR_OK)
         goto out;
 
     if ((ret = dmZLibInflate(&zctx)) != DMERR_OK)
@@ -566,7 +566,7 @@
 #endif
 
 
-static BOOL dm_mem_realloc(DMResource *ctx, const size_t newSize)
+static bool dm_mem_realloc(DMResource *ctx, const size_t newSize)
 {
     size_t grow;
 
@@ -574,7 +574,7 @@
     if (ctx->maxSize > 0 && newSize > ctx->maxSize)
     {
         ctx->status = DMERR_BOUNDS;
-        return FALSE;
+        return false;
     }
 
     // New size is smaller than old
@@ -589,7 +589,7 @@
     if (ctx->maxSize > 0 && ctx->memAlloc + grow >= ctx->maxSize)
     {
         ctx->status = DMERR_BOUNDS;
-        return FALSE;
+        return false;
     }
 
     // Grow the buffer
@@ -597,13 +597,13 @@
     if ((ctx->memData = dmRealloc(ctx->memData, ctx->memAlloc)) == NULL)
     {
         ctx->status = DMERR_MALLOC;
-        return FALSE;
+        return false;
     }
 
 out:
     ctx->memSize = newSize;
 
-    return TRUE;
+    return true;
 }
 
 
@@ -669,7 +669,7 @@
 }
 
 
-static BOOL dm_mem_feof(DMResource *ctx)
+static bool dm_mem_feof(DMResource *ctx)
 {
     return ((size_t) ctx->memOffset) >= ctx->memSize;
 }
@@ -977,7 +977,7 @@
 }
 
 
-BOOL dmfeof(DMResource *fh)
+bool dmfeof(DMResource *fh)
 {
     return fh->fops->feof(fh);
 }
@@ -1109,7 +1109,7 @@
 int dmResourcesInit(DMResourceLib **plib, const char *filename, const char *path, const int flags, int (*classifier)(DMResource *))
 {
     DMResourceLib *lib;
-    BOOL initialized = FALSE;
+    bool initialized = false;
 
     // Allocate the resource library structure
     if ((*plib = lib = dmMalloc0(sizeof(DMResourceLib))) == NULL)
@@ -1129,7 +1129,7 @@
         lib->packFilename = dm_strdup(filename);
 
         // Initialize PACK, open as read-only
-        ret = dmPackOpen(lib->packFilename, &lib->packFile, TRUE);
+        ret = dmPackOpen(lib->packFilename, &lib->packFile, true);
         if (ret != DMERR_OK)
         {
             if ((flags & DRF_USE_STDIO) == 0)
@@ -1163,7 +1163,7 @@
                 dmResourceInsert(lib, res);
             }
 
-            initialized = TRUE;
+            initialized = true;
         }
     }
 #else
@@ -1177,7 +1177,7 @@
         int ret = dmResourcesLoadDirectory(lib, lib->resPath);
         if (ret != DMERR_OK)
             return ret;
-        initialized = TRUE;
+        initialized = true;
     }
 #endif
 
@@ -1243,7 +1243,7 @@
 }
 
 
-int dmResourcesPreload(DMResourceLib *lib, BOOL start, int *loaded, int *total)
+int dmResourcesPreload(DMResourceLib *lib, bool start, int *loaded, int *total)
 {
     int ret = DMERR_OK;
 
@@ -1320,13 +1320,13 @@
 }
 
 
-BOOL dmf_read_str(DMResource *fh, void *ptr, const size_t len)
+bool dmf_read_str(DMResource *fh, void *ptr, const size_t len)
 {
     return dmfread(ptr, len, 1, fh) == 1;
 }
 
 
-BOOL dmf_read_byte(DMResource *fh, Uint8 *val)
+bool dmf_read_byte(DMResource *fh, Uint8 *val)
 {
     int tmp = dmfgetc(fh);
     *val = tmp;
@@ -1335,12 +1335,12 @@
 
 
 #define DM_DEFINE_FFUNC(xname, xtype, xmacro)           \
-BOOL dmf_read_ ## xname (DMResource *fh, xtype *val) {  \
+bool dmf_read_ ## xname (DMResource *fh, xtype *val) {  \
     xtype result;                                       \
     if (dmfread(&result, sizeof( xtype ), 1, fh) != 1)  \
-        return FALSE;                                   \
+        return false;                                   \
     *val = DM_ ## xmacro ## _TO_NATIVE (result);        \
-    return TRUE;                                        \
+    return true;                                        \
 }
 
 #include "dmfiletmpl.h"