Fix compilation on Windows (remove basename() call)

README.md

@@ -3,6 +3,10 @@ Greg Kennedy, 2021
 
 Reduce the size of GoldSrc (Half-Life, Counter-Strike 1.6, etc) .BSP files by eliminating embedded textures that already exist in .WAD files.
 
+The official site for YesWADTextures is https://github.com/greg-kennedy/YesWADTextures.
+
+Windows users can find a recent download in the "Releases" section.  Other users: clone (or download) the code, then run `make` in the root folder.
+
 ## Usage
 Invoke the program like this:
 
@@ -16,6 +20,9 @@ For example, [dm\_office.bsp](https://www.moddb.com/games/half-life/addons/dm-of
 
 will prune all but one texture from `dm_office.bsp`, and update its required WAD list to include `halflife.wad`.  The new output file measures 572,828 bytes - a 28.5% decrease!
 
+## Warning
+This tool has not been extensively tested and may have BSP-damaging bugs.  Keep backups.  It does not warn before overwriting the output file - be careful not to accidentally overwrite something valuable.  You have been warned!
+
 ## Overview
 A `.WAD` file is a collection of textures, used by games based on the Quake engine.  GoldSrc uses version 3 of the .WAD file to store and organize textures.  Half-Life ships with a handful of .WAD files, while mods (Counter-Strike) or expansions (Opposing Force) include additional packs for their content.  Map authors may also distribute a .WAD file to provide custom textures for their map.
 

wad.c

@@ -10,8 +10,6 @@
 #include <string.h>
 // for "tolower"
 #include <ctype.h>
-// for "basename"
-#include <libgen.h>
 
 struct s_wad * read_wad(const char* path)
 {
@@ -43,12 +41,15 @@ struct s_wad * read_wad(const char* path)
 	struct s_wad* ret = u_calloc(sizeof(struct s_wad));
 	// copy base path into name
 	//  HL tends to use lowercased WAD names and uppercased texture names
-	char *temp = strdup(path);
-	char *base = basename(temp);
+	const char *base = path + strlen(path);
+	do {
+		base--;
+	} while (base > path && *base != '/' && *base != '\\');
+
 	ret->name = u_calloc(strlen(base) + 1);
 	for (unsigned int i = 0; i < strlen(base); i ++)
 		ret->name[i] = tolower(base[i]);
-	free(temp);
+
 	unsigned int texture_limit = 0;
 
 	// read directory entries