From 2c0d39acd0329d3e976bd83d85fcf67388465e67 Mon Sep 17 00:00:00 2001
From: Michael Smith <mikesmiffy128@gmail.com>
Date: Thu, 24 Mar 2022 04:56:31 +0000
Subject: Add auto VDF installation

Breaks the Linux build because I can't file paths brain I need sleeping
---
 src/os-unix.h  |  2 ++
 src/os-win32.h |  2 ++
 src/sst.c      | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 85 insertions(+)

diff --git a/src/os-unix.h b/src/os-unix.h
index 6522029..8b7bf27 100644
--- a/src/os-unix.h
+++ b/src/os-unix.h
@@ -34,6 +34,8 @@ typedef char os_char;
 #define os_open open
 #define os_access access
 #define os_stat stat
+#define os_mkdir(f) mkdir(f, 0755) // use real mkdir(2) if the mode matters
+#define os_unlink unlink
 #define os_getenv getenv
 #define os_getcwd getcwd
 
diff --git a/src/os-win32.h b/src/os-win32.h
index c7c0bae..08399dd 100644
--- a/src/os-win32.h
+++ b/src/os-win32.h
@@ -40,6 +40,8 @@ typedef unsigned short os_char;
 // ucrt defines __stat64 to _stat64. we want _wstat64 to be the actual function
 #define _stat64(path, buf) _wstat64(path, buf)
 #define os_stat _stat64
+#define os_mkdir _wmkdir
+#define os_unlink _wunlink
 #define os_getenv _wgetenv
 #define os_getcwd _wgetcwd
 
diff --git a/src/sst.c b/src/sst.c
index 1d0d18a..e9aa972 100644
--- a/src/sst.c
+++ b/src/sst.c
@@ -17,6 +17,10 @@
 #include <stdbool.h>
 #include <string.h>
 
+#ifdef _WIN32
+#include <shlwapi.h>
+#endif
+
 #include "autojump.h"
 #include "con_.h"
 #include "demorec.h"
@@ -31,6 +35,12 @@
 #include "vcall.h"
 #include "version.h"
 
+#ifdef _WIN32
+#define fS "S"
+#else
+#define fS "s"
+#endif
+
 #define RGBA(r, g, b, a) (&(struct con_colour){(r), (g), (b), (a)})
 
 u32 _gametype_tag = 0; // spaghetti: no point making a .c file for 1 variable
@@ -147,6 +157,77 @@ static inline void *ownhandle(void) {
 }
 #endif
 
+#define VDFBASENAME "SourceSpeedrunTools"
+
+DEF_CCMD_HERE(sst_autoload_enable, "Register SST to load on game startup", 0) {
+	// note: gamedir doesn't account for if the dll is in a base mod's
+	// directory, although it will yield a valid/working relative path anyway.
+	const os_char *searchdir = ifacever == 3 ?
+			gameinfo_gamedir : gameinfo_bindir;
+	os_char path[PATH_MAX];
+	if (!os_dlfile(ownhandle(), path, sizeof(path) / sizeof(*path))) {
+		// hopefully by this point this won't happen, but, like, never know
+		con_warn("error: failed to get path to plugin\n");
+		return;
+	}
+	os_char relpath[PATH_MAX];
+#ifdef _WIN32
+	if (!PathRelativePathToW(relpath, searchdir, FILE_ATTRIBUTE_DIRECTORY,
+			path, 0)) {
+		con_warn("error: couldn't compute a relative path for some reason\n");
+		return;
+	}
+	// arbitrary aesthetic judgement
+	for (os_char *p = relpath; *p; ++p) if (*p == L'\\') *p = L'/'; 
+#else
+#error TODO(linux): implement this, it's late right now and I can't be bothered
+#endif
+	int len = os_strlen(gameinfo_gamedir);
+	if (len + sizeof("/addons/" VDFBASENAME ".vdf") >
+			sizeof(path) / sizeof(*path)) {
+		con_warn("error: path to VDF is too long\n");
+		return;
+	}
+	memcpy(path, gameinfo_gamedir, len * sizeof(*gameinfo_gamedir));
+	memcpy(path + len, OS_LIT("/addons"), 8 * sizeof(os_char));
+	if (os_mkdir(path) == -1 && errno != EEXIST) {
+		con_warn("error: couldn't create %" fS ": %s\n", path, strerror(errno));
+		return;
+	}
+	memcpy(path + len + sizeof("/addons") - 1,
+			OS_LIT("/") OS_LIT(VDFBASENAME) OS_LIT(".vdf"),
+			sizeof("/" VDFBASENAME ".vdf") * sizeof(os_char));
+	FILE *f = os_fopen(path, OS_LIT("wb"));
+	if (!f) {
+		con_warn("error: couldn't open %" fS ": %s", path, strerror(errno));
+		return;
+	}
+	// XXX: oh, crap, we're clobbering unicode again. welp, let's hope the
+	// theory that the engine is just as bad if not worse is true so that it
+	// doesn't matter.
+	if (fprintf(f, "Plugin { file \"%" fS "\" }\n", relpath) < 0) {
+		con_warn("error: couldn't write to %" fS ": %s", path, strerror(errno));
+		// XXX: ?????? now what
+	}
+	fclose(f);
+}
+
+DEF_CCMD_HERE(sst_autoload_disable, "Stop loading SST on game startup", 0) {
+	os_char path[PATH_MAX];
+	int len = os_strlen(gameinfo_gamedir);
+	if (len + sizeof("/addons/" VDFBASENAME ".vdf") >
+			sizeof(path) / sizeof(*path)) {
+		con_warn("error: path to VDF is too long\n");
+		return;
+	}
+	memcpy(path, gameinfo_gamedir, len * sizeof(*gameinfo_gamedir));
+	memcpy(path + len, OS_LIT("/addons/") OS_LIT(VDFBASENAME) OS_LIT(".vdf"),
+			sizeof("/addons/" VDFBASENAME ".vdf") * sizeof(os_char));
+	if (os_unlink(path) == -1 && errno != ENOENT) {
+		con_warn("warning: couldn't delete %" fS ":%s\n", path, strerror(errno));
+	}
+}
+
 static bool do_load(ifacefactory enginef, ifacefactory serverf) {
 	factory_engine = enginef; factory_server = serverf;
 #ifndef __linux__
-- 
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