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-rw-r--r--src/lua/lbaselib.c651
1 files changed, 651 insertions, 0 deletions
diff --git a/src/lua/lbaselib.c b/src/lua/lbaselib.c
new file mode 100644
index 00000000..71c643aa
--- /dev/null
+++ b/src/lua/lbaselib.c
@@ -0,0 +1,651 @@
+/*
+** $Id: lbaselib.c,v 1.2 2001/11/26 23:00:23 darkgod Exp $
+** Basic library
+** See Copyright Notice in lua.h
+*/
+
+
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "luadebug.h"
+#include "lualib.h"
+
+
+
+/*
+** If your system does not support `stderr', redefine this function, or
+** redefine _ERRORMESSAGE so that it won't need _ALERT.
+*/
+static int luaB__ALERT (lua_State *L) {
+ fputs(luaL_check_string(L, 1), stderr);
+ return 0;
+}
+
+
+/*
+** Basic implementation of _ERRORMESSAGE.
+** The library `liolib' redefines _ERRORMESSAGE for better error information.
+*/
+static int luaB__ERRORMESSAGE (lua_State *L) {
+ luaL_checktype(L, 1, LUA_TSTRING);
+ lua_getglobal(L, LUA_ALERT);
+ if (lua_isfunction(L, -1)) { /* avoid error loop if _ALERT is not defined */
+ lua_Debug ar;
+ lua_pushstring(L, "error: ");
+ lua_pushvalue(L, 1);
+ if (lua_getstack(L, 1, &ar)) {
+ lua_getinfo(L, "Sl", &ar);
+ if (ar.source && ar.currentline > 0) {
+ char buff[100];
+ sprintf(buff, "\n <%.70s: line %d>", ar.short_src, ar.currentline);
+ lua_pushstring(L, buff);
+ lua_concat(L, 2);
+ }
+ }
+ lua_pushstring(L, "\n");
+ lua_concat(L, 3);
+ lua_rawcall(L, 1, 0);
+ }
+ return 0;
+}
+
+
+/*
+** If your system does not support `stdout', you can just remove this function.
+** If you need, you can define your own `print' function, following this
+** model but changing `fputs' to put the strings at a proper place
+** (a console window or a log file, for instance).
+*/
+static int luaB_print (lua_State *L) {
+ int n = lua_gettop(L); /* number of arguments */
+ int i;
+ lua_getglobal(L, "tostring");
+ for (i=1; i<=n; i++) {
+ const char *s;
+ lua_pushvalue(L, -1); /* function to be called */
+ lua_pushvalue(L, i); /* value to print */
+ lua_rawcall(L, 1, 1);
+ s = lua_tostring(L, -1); /* get result */
+ if (s == NULL)
+ lua_error(L, "`tostring' must return a string to `print'");
+ if (i>1) fputs("\t", stdout);
+ fputs(s, stdout);
+ lua_pop(L, 1); /* pop result */
+ }
+ fputs("\n", stdout);
+ return 0;
+}
+
+
+static int luaB_tonumber (lua_State *L) {
+ int base = luaL_opt_int(L, 2, 10);
+ if (base == 10) { /* standard conversion */
+ luaL_checkany(L, 1);
+ if (lua_isnumber(L, 1)) {
+ lua_pushnumber(L, lua_tonumber(L, 1));
+ return 1;
+ }
+ }
+ else {
+ const char *s1 = luaL_check_string(L, 1);
+ char *s2;
+ unsigned long n;
+ luaL_arg_check(L, 2 <= base && base <= 36, 2, "base out of range");
+ n = strtoul(s1, &s2, base);
+ if (s1 != s2) { /* at least one valid digit? */
+ while (isspace((unsigned char)*s2)) s2++; /* skip trailing spaces */
+ if (*s2 == '\0') { /* no invalid trailing characters? */
+ lua_pushnumber(L, n);
+ return 1;
+ }
+ }
+ }
+ lua_pushnil(L); /* else not a number */
+ return 1;
+}
+
+
+static int luaB_error (lua_State *L) {
+ lua_error(L, luaL_opt_string(L, 1, NULL));
+ return 0; /* to avoid warnings */
+}
+
+static int luaB_setglobal (lua_State *L) {
+ luaL_checkany(L, 2);
+ lua_setglobal(L, luaL_check_string(L, 1));
+ return 0;
+}
+
+static int luaB_getglobal (lua_State *L) {
+ lua_getglobal(L, luaL_check_string(L, 1));
+ return 1;
+}
+
+static int luaB_tag (lua_State *L) {
+ luaL_checkany(L, 1);
+ lua_pushnumber(L, lua_tag(L, 1));
+ return 1;
+}
+
+static int luaB_settag (lua_State *L) {
+ luaL_checktype(L, 1, LUA_TTABLE);
+ lua_pushvalue(L, 1); /* push table */
+ lua_settag(L, luaL_check_int(L, 2));
+ return 1; /* return table */
+}
+
+static int luaB_newtag (lua_State *L) {
+ lua_pushnumber(L, lua_newtag(L));
+ return 1;
+}
+
+static int luaB_copytagmethods (lua_State *L) {
+ lua_pushnumber(L, lua_copytagmethods(L, luaL_check_int(L, 1),
+ luaL_check_int(L, 2)));
+ return 1;
+}
+
+static int luaB_globals (lua_State *L) {
+ lua_getglobals(L); /* value to be returned */
+ if (!lua_isnull(L, 1)) {
+ luaL_checktype(L, 1, LUA_TTABLE);
+ lua_pushvalue(L, 1); /* new table of globals */
+ lua_setglobals(L);
+ }
+ return 1;
+}
+
+static int luaB_rawget (lua_State *L) {
+ luaL_checktype(L, 1, LUA_TTABLE);
+ luaL_checkany(L, 2);
+ lua_rawget(L, -2);
+ return 1;
+}
+
+static int luaB_rawset (lua_State *L) {
+ luaL_checktype(L, 1, LUA_TTABLE);
+ luaL_checkany(L, 2);
+ luaL_checkany(L, 3);
+ lua_rawset(L, -3);
+ return 1;
+}
+
+static int luaB_settagmethod (lua_State *L) {
+ int tag = luaL_check_int(L, 1);
+ const char *event = luaL_check_string(L, 2);
+ luaL_arg_check(L, lua_isfunction(L, 3) || lua_isnil(L, 3), 3,
+ "function or nil expected");
+ if (strcmp(event, "gc") == 0)
+ lua_error(L, "deprecated use: cannot set the `gc' tag method from Lua");
+ lua_gettagmethod(L, tag, event);
+ lua_pushvalue(L, 3);
+ lua_settagmethod(L, tag, event);
+ return 1;
+}
+
+
+static int luaB_gettagmethod (lua_State *L) {
+ int tag = luaL_check_int(L, 1);
+ const char *event = luaL_check_string(L, 2);
+ if (strcmp(event, "gc") == 0)
+ lua_error(L, "deprecated use: cannot get the `gc' tag method from Lua");
+ lua_gettagmethod(L, tag, event);
+ return 1;
+}
+
+
+static int luaB_gcinfo (lua_State *L) {
+ lua_pushnumber(L, lua_getgccount(L));
+ lua_pushnumber(L, lua_getgcthreshold(L));
+ return 2;
+}
+
+
+static int luaB_collectgarbage (lua_State *L) {
+ lua_setgcthreshold(L, luaL_opt_int(L, 1, 0));
+ return 0;
+}
+
+
+static int luaB_type (lua_State *L) {
+ luaL_checkany(L, 1);
+ lua_pushstring(L, lua_typename(L, lua_type(L, 1)));
+ return 1;
+}
+
+
+static int luaB_next (lua_State *L) {
+ luaL_checktype(L, 1, LUA_TTABLE);
+ lua_settop(L, 2); /* create a 2nd argument if there isn't one */
+ if (lua_next(L, 1))
+ return 2;
+ else {
+ lua_pushnil(L);
+ return 1;
+ }
+}
+
+
+static int passresults (lua_State *L, int status, int oldtop) {
+ static const char *const errornames[] =
+ {"ok", "run-time error", "file error", "syntax error",
+ "memory error", "error in error handling"};
+ if (status == 0) {
+ int nresults = lua_gettop(L) - oldtop;
+ if (nresults > 0)
+ return nresults; /* results are already on the stack */
+ else {
+ lua_pushuserdata(L, NULL); /* at least one result to signal no errors */
+ return 1;
+ }
+ }
+ else { /* error */
+ lua_pushnil(L);
+ lua_pushstring(L, errornames[status]); /* error code */
+ return 2;
+ }
+}
+
+static int luaB_dostring (lua_State *L) {
+ int oldtop = lua_gettop(L);
+ size_t l;
+ const char *s = luaL_check_lstr(L, 1, &l);
+ if (*s == '\27') /* binary files start with ESC... */
+ lua_error(L, "`dostring' cannot run pre-compiled code");
+ return passresults(L, lua_dobuffer(L, s, l, luaL_opt_string(L, 2, s)), oldtop);
+}
+
+
+static int luaB_dofile (lua_State *L) {
+ int oldtop = lua_gettop(L);
+ const char *fname = luaL_opt_string(L, 1, NULL);
+ return passresults(L, lua_dofile(L, fname), oldtop);
+}
+
+
+static int luaB_call (lua_State *L) {
+ int oldtop;
+ const char *options = luaL_opt_string(L, 3, "");
+ int err = 0; /* index of old error method */
+ int i, status;
+ int n;
+ luaL_checktype(L, 2, LUA_TTABLE);
+ n = lua_getn(L, 2);
+ if (!lua_isnull(L, 4)) { /* set new error method */
+ lua_getglobal(L, LUA_ERRORMESSAGE);
+ err = lua_gettop(L); /* get index */
+ lua_pushvalue(L, 4);
+ lua_setglobal(L, LUA_ERRORMESSAGE);
+ }
+ oldtop = lua_gettop(L); /* top before function-call preparation */
+ /* push function */
+ lua_pushvalue(L, 1);
+ luaL_checkstack(L, n, "too many arguments");
+ for (i=0; i<n; i++) /* push arg[1...n] */
+ lua_rawgeti(L, 2, i+1);
+ status = lua_call(L, n, LUA_MULTRET);
+ if (err != 0) { /* restore old error method */
+ lua_pushvalue(L, err);
+ lua_setglobal(L, LUA_ERRORMESSAGE);
+ }
+ if (status != 0) { /* error in call? */
+ if (strchr(options, 'x'))
+ lua_pushnil(L); /* return nil to signal the error */
+ else
+ lua_error(L, NULL); /* propagate error without additional messages */
+ return 1;
+ }
+ if (strchr(options, 'p')) /* pack results? */
+ lua_error(L, "deprecated option `p' in `call'");
+ return lua_gettop(L) - oldtop; /* results are already on the stack */
+}
+
+
+static int luaB_tostring (lua_State *L) {
+ char buff[64];
+ switch (lua_type(L, 1)) {
+ case LUA_TNUMBER:
+ lua_pushstring(L, lua_tostring(L, 1));
+ return 1;
+ case LUA_TSTRING:
+ lua_pushvalue(L, 1);
+ return 1;
+ case LUA_TTABLE:
+ sprintf(buff, "table: %p", lua_topointer(L, 1));
+ break;
+ case LUA_TFUNCTION:
+ sprintf(buff, "function: %p", lua_topointer(L, 1));
+ break;
+ case LUA_TUSERDATA:
+ sprintf(buff, "userdata(%d): %p", lua_tag(L, 1), lua_touserdata(L, 1));
+ break;
+ case LUA_TNIL:
+ lua_pushstring(L, "nil");
+ return 1;
+ default:
+ luaL_argerror(L, 1, "value expected");
+ }
+ lua_pushstring(L, buff);
+ return 1;
+}
+
+
+static int luaB_foreachi (lua_State *L) {
+ int n, i;
+ luaL_checktype(L, 1, LUA_TTABLE);
+ luaL_checktype(L, 2, LUA_TFUNCTION);
+ n = lua_getn(L, 1);
+ for (i=1; i<=n; i++) {
+ lua_pushvalue(L, 2); /* function */
+ lua_pushnumber(L, i); /* 1st argument */
+ lua_rawgeti(L, 1, i); /* 2nd argument */
+ lua_rawcall(L, 2, 1);
+ if (!lua_isnil(L, -1))
+ return 1;
+ lua_pop(L, 1); /* remove nil result */
+ }
+ return 0;
+}
+
+
+static int luaB_foreach (lua_State *L) {
+ luaL_checktype(L, 1, LUA_TTABLE);
+ luaL_checktype(L, 2, LUA_TFUNCTION);
+ lua_pushnil(L); /* first index */
+ for (;;) {
+ if (lua_next(L, 1) == 0)
+ return 0;
+ lua_pushvalue(L, 2); /* function */
+ lua_pushvalue(L, -3); /* key */
+ lua_pushvalue(L, -3); /* value */
+ lua_rawcall(L, 2, 1);
+ if (!lua_isnil(L, -1))
+ return 1;
+ lua_pop(L, 2); /* remove value and result */
+ }
+}
+
+
+static int luaB_assert (lua_State *L) {
+ luaL_checkany(L, 1);
+ if (lua_isnil(L, 1))
+ luaL_verror(L, "assertion failed! %.90s", luaL_opt_string(L, 2, ""));
+ return 0;
+}
+
+
+static int luaB_getn (lua_State *L) {
+ luaL_checktype(L, 1, LUA_TTABLE);
+ lua_pushnumber(L, lua_getn(L, 1));
+ return 1;
+}
+
+
+static int luaB_tinsert (lua_State *L) {
+ int v = lua_gettop(L); /* last argument: to be inserted */
+ int n, pos;
+ luaL_checktype(L, 1, LUA_TTABLE);
+ n = lua_getn(L, 1);
+ if (v == 2) /* called with only 2 arguments */
+ pos = n+1;
+ else
+ pos = luaL_check_int(L, 2); /* 2nd argument is the position */
+ lua_pushstring(L, "n");
+ lua_pushnumber(L, n+1);
+ lua_rawset(L, 1); /* t.n = n+1 */
+ for (; n>=pos; n--) {
+ lua_rawgeti(L, 1, n);
+ lua_rawseti(L, 1, n+1); /* t[n+1] = t[n] */
+ }
+ lua_pushvalue(L, v);
+ lua_rawseti(L, 1, pos); /* t[pos] = v */
+ return 0;
+}
+
+
+static int luaB_tremove (lua_State *L) {
+ int pos, n;
+ luaL_checktype(L, 1, LUA_TTABLE);
+ n = lua_getn(L, 1);
+ pos = luaL_opt_int(L, 2, n);
+ if (n <= 0) return 0; /* table is "empty" */
+ lua_rawgeti(L, 1, pos); /* result = t[pos] */
+ for ( ;pos<n; pos++) {
+ lua_rawgeti(L, 1, pos+1);
+ lua_rawseti(L, 1, pos); /* a[pos] = a[pos+1] */
+ }
+ lua_pushstring(L, "n");
+ lua_pushnumber(L, n-1);
+ lua_rawset(L, 1); /* t.n = n-1 */
+ lua_pushnil(L);
+ lua_rawseti(L, 1, n); /* t[n] = nil */
+ return 1;
+}
+
+
+
+
+/*
+** {======================================================
+** Quicksort
+** (based on `Algorithms in MODULA-3', Robert Sedgewick;
+** Addison-Wesley, 1993.)
+*/
+
+
+static void set2 (lua_State *L, int i, int j) {
+ lua_rawseti(L, 1, i);
+ lua_rawseti(L, 1, j);
+}
+
+static int sort_comp (lua_State *L, int a, int b) {
+ /* WARNING: the caller (auxsort) must ensure stack space */
+ if (!lua_isnil(L, 2)) { /* function? */
+ int res;
+ lua_pushvalue(L, 2);
+ lua_pushvalue(L, a-1); /* -1 to compensate function */
+ lua_pushvalue(L, b-2); /* -2 to compensate function and `a' */
+ lua_rawcall(L, 2, 1);
+ res = !lua_isnil(L, -1);
+ lua_pop(L, 1);
+ return res;
+ }
+ else /* a < b? */
+ return lua_lessthan(L, a, b);
+}
+
+static void auxsort (lua_State *L, int l, int u) {
+ while (l < u) { /* for tail recursion */
+ int i, j;
+ /* sort elements a[l], a[(l+u)/2] and a[u] */
+ lua_rawgeti(L, 1, l);
+ lua_rawgeti(L, 1, u);
+ if (sort_comp(L, -1, -2)) /* a[u] < a[l]? */
+ set2(L, l, u); /* swap a[l] - a[u] */
+ else
+ lua_pop(L, 2);
+ if (u-l == 1) break; /* only 2 elements */
+ i = (l+u)/2;
+ lua_rawgeti(L, 1, i);
+ lua_rawgeti(L, 1, l);
+ if (sort_comp(L, -2, -1)) /* a[i]<a[l]? */
+ set2(L, i, l);
+ else {
+ lua_pop(L, 1); /* remove a[l] */
+ lua_rawgeti(L, 1, u);
+ if (sort_comp(L, -1, -2)) /* a[u]<a[i]? */
+ set2(L, i, u);
+ else
+ lua_pop(L, 2);
+ }
+ if (u-l == 2) break; /* only 3 elements */
+ lua_rawgeti(L, 1, i); /* Pivot */
+ lua_pushvalue(L, -1);
+ lua_rawgeti(L, 1, u-1);
+ set2(L, i, u-1);
+ /* a[l] <= P == a[u-1] <= a[u], only need to sort from l+1 to u-2 */
+ i = l; j = u-1;
+ for (;;) { /* invariant: a[l..i] <= P <= a[j..u] */
+ /* repeat ++i until a[i] >= P */
+ while (lua_rawgeti(L, 1, ++i), sort_comp(L, -1, -2)) {
+ if (i>u) lua_error(L, "invalid order function for sorting");
+ lua_pop(L, 1); /* remove a[i] */
+ }
+ /* repeat --j until a[j] <= P */
+ while (lua_rawgeti(L, 1, --j), sort_comp(L, -3, -1)) {
+ if (j<l) lua_error(L, "invalid order function for sorting");
+ lua_pop(L, 1); /* remove a[j] */
+ }
+ if (j<i) {
+ lua_pop(L, 3); /* pop pivot, a[i], a[j] */
+ break;
+ }
+ set2(L, i, j);
+ }
+ lua_rawgeti(L, 1, u-1);
+ lua_rawgeti(L, 1, i);
+ set2(L, u-1, i); /* swap pivot (a[u-1]) with a[i] */
+ /* a[l..i-1] <= a[i] == P <= a[i+1..u] */
+ /* adjust so that smaller "half" is in [j..i] and larger one in [l..u] */
+ if (i-l < u-i) {
+ j=l; i=i-1; l=i+2;
+ }
+ else {
+ j=i+1; i=u; u=j-2;
+ }
+ auxsort(L, j, i); /* call recursively the smaller one */
+ } /* repeat the routine for the larger one */
+}
+
+static int luaB_sort (lua_State *L) {
+ int n;
+ luaL_checktype(L, 1, LUA_TTABLE);
+ n = lua_getn(L, 1);
+ if (!lua_isnull(L, 2)) /* is there a 2nd argument? */
+ luaL_checktype(L, 2, LUA_TFUNCTION);
+ lua_settop(L, 2); /* make sure there is two arguments */
+ auxsort(L, 1, n);
+ return 0;
+}
+
+/* }====================================================== */
+
+
+
+/*
+** {======================================================
+** Deprecated functions to manipulate global environment.
+** =======================================================
+*/
+
+
+#define num_deprecated 4
+
+static const struct luaL_reg deprecated_names [num_deprecated] = {
+ {"foreachvar", luaB_foreach},
+ {"nextvar", luaB_next},
+ {"rawgetglobal", luaB_rawget},
+ {"rawsetglobal", luaB_rawset}
+};
+
+
+#ifdef LUA_DEPRECATEDFUNCS
+
+/*
+** call corresponding function inserting `globals' as first argument
+*/
+static int deprecated_func (lua_State *L) {
+ lua_insert(L, 1); /* upvalue is the function to be called */
+ lua_getglobals(L);
+ lua_insert(L, 2); /* table of globals is 1o argument */
+ lua_rawcall(L, lua_gettop(L)-1, LUA_MULTRET);
+ return lua_gettop(L); /* return all results */
+}
+
+
+static void deprecated_funcs (lua_State *L) {
+ int i;
+ for (i=0; i<num_deprecated; i++) {
+ lua_pushcfunction(L, deprecated_names[i].func);
+ lua_pushcclosure(L, deprecated_func, 1);
+ lua_setglobal(L, deprecated_names[i].name);
+ }
+}
+
+
+#else
+
+/*
+** gives an explicit error in any attempt to call a deprecated function
+*/
+static int deprecated_func (lua_State *L) {
+ luaL_verror(L, "function `%.20s' is deprecated", lua_tostring(L, -1));
+ return 0; /* to avoid warnings */
+}
+
+
+static void deprecated_funcs (lua_State *L) {
+ int i;
+ for (i=0; i<num_deprecated; i++) {
+ lua_pushstring(L, deprecated_names[i].name);
+ lua_pushcclosure(L, deprecated_func, 1);
+ lua_setglobal(L, deprecated_names[i].name);
+ }
+}
+
+#endif
+
+/* }====================================================== */
+
+static const struct luaL_reg base_funcs[] = {
+ {LUA_ALERT, luaB__ALERT},
+ {LUA_ERRORMESSAGE, luaB__ERRORMESSAGE},
+ {"call", luaB_call},
+ {"collectgarbage", luaB_collectgarbage},
+ {"copytagmethods", luaB_copytagmethods},
+ {"dofile", luaB_dofile},
+ {"dostring", luaB_dostring},
+ {"error", luaB_error},
+ {"foreach", luaB_foreach},
+ {"foreachi", luaB_foreachi},
+ {"gcinfo", luaB_gcinfo},
+ {"getglobal", luaB_getglobal},
+ {"gettagmethod", luaB_gettagmethod},
+ {"globals", luaB_globals},
+ {"newtag", luaB_newtag},
+ {"next", luaB_next},
+ {"print", luaB_print},
+ {"rawget", luaB_rawget},
+ {"rawset", luaB_rawset},
+ {"rawgettable", luaB_rawget}, /* for compatibility */
+ {"rawsettable", luaB_rawset}, /* for compatibility */
+ {"setglobal", luaB_setglobal},
+ {"settag", luaB_settag},
+ {"settagmethod", luaB_settagmethod},
+ {"tag", luaB_tag},
+ {"tonumber", luaB_tonumber},
+ {"tostring", luaB_tostring},
+ {"type", luaB_type},
+ {"assert", luaB_assert},
+ {"getn", luaB_getn},
+ {"sort", luaB_sort},
+ {"tinsert", luaB_tinsert},
+ {"tremove", luaB_tremove}
+};
+
+
+
+LUALIB_API void lua_baselibopen (lua_State *L) {
+ luaL_openl(L, base_funcs);
+ lua_pushstring(L, LUA_VERSION);
+ lua_setglobal(L, "_VERSION");
+ deprecated_funcs(L);
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-27 00:24:24 +0000