Remove los.c and lmath.c, and put their functions in the bundled Lua source

lua-5.4/lmathlib.c

@@ -4,6 +4,11 @@
 ** See Copyright Notice in lua.h
 */
 
+/***
+ * Math and algorithms.
+ * @module math
+ */
+
 #define lmathlib_c
 #define LUA_LIB
 
@@ -646,6 +651,26 @@ static void setrandfunc (lua_State *L) {
   luaL_setfuncs(L, randfuncs, 1);
 }
 
+/***
+ * Linearly interpolates using the values given.
+ *
+ * Returns `x + (y - x) * z`
+ *
+ * @function lerp
+ * @tparam number x
+ * @tparam number y
+ * @tparam number z
+ */
+static int
+math_lerp(lua_State *L)
+{
+	double x; /* parameter 1 (number) */
+
+	x = luaL_checknumber(L, 1);
+	lua_pushnumber(L, x + (luaL_checknumber(L, 2) - x) * luaL_checknumber(L, 3));
+	return 1;
+}
+
 /* }================================================================== */
 
 
@@ -715,6 +740,7 @@ static const luaL_Reg mathlib[] = {
   {"floor", math_floor},
   {"fmod",   math_fmod},
   {"ult",   math_ult},
+  {"lerp",  math_lerp},
   {"log",   math_log},
   {"max",   math_max},
   {"min",   math_min},

lua-5.4/loslib.c

@@ -4,6 +4,18 @@
 ** See Copyright Notice in lua.h
 */
 
+/***
+ * Operating system related facilities.
+ * @module os
+ */
+
+#ifdef __linux__
+#	include <bits/local_lim.h>
+#else
+/* assume OpenBSD/NetBSD */
+#	include <sys/syslimits.h>
+#endif
+
 #define loslib_c
 #define LUA_LIB
 
@@ -14,6 +26,7 @@
 #include <locale.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 #include <time.h>
 
 #include "lua.h"
@@ -403,6 +416,26 @@ static int os_exit (lua_State *L) {
   return 0;
 }
 
+/***
+ * Returns the system hostname.
+ *
+ * @function hostname
+ * @usage local hostname = os.hostname()
+ */
+static int
+os_hostname(lua_State *L)
+{
+	char *buffer;
+
+	buffer = malloc(HOST_NAME_MAX * sizeof(char *));
+
+	gethostname(buffer, HOST_NAME_MAX); /* get hostname */
+	lua_pushstring(L, buffer);
+	free(buffer);
+
+    return 1;
+}
+
 
 static const luaL_Reg syslib[] = {
   {"clock",     os_clock},
@@ -411,6 +444,7 @@ static const luaL_Reg syslib[] = {
   {"execute",   os_execute},
   {"exit",      os_exit},
   {"getenv",    os_getenv},
+  {"hostname",  os_hostname},
   {"remove",    os_remove},
   {"rename",    os_rename},
   {"setlocale", os_setlocale},