mirror of https://github.com/lua/lua
69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
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/*
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** $Id: $
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** Some generic functions over Lua objects
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** See Copyright Notice in lua.h
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "lobject.h"
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#include "lua.h"
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char *luaO_typenames[] = { /* ORDER LUA_T */
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"userdata", "line", "cmark", "mark", "function", "function",
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"prototype", "table", "string", "number", "nil",
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NULL
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};
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long luaO_nentities = 0;
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/* hash dimensions values */
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static long dimensions[] =
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{5L, 11L, 23L, 47L, 97L, 197L, 397L, 797L, 1597L, 3203L, 6421L,
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12853L, 25717L, 51437L, 102811L, 205619L, 411233L, 822433L,
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1644817L, 3289613L, 6579211L, 13158023L, MAX_INT};
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int luaO_redimension (int oldsize)
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{
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int i;
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for (i=0; dimensions[i]<MAX_INT; i++) {
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if (dimensions[i] > oldsize)
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return dimensions[i];
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}
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lua_error("table overflow");
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return 0; /* to avoid warnings */
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}
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int luaO_equalObj (TObject *t1, TObject *t2)
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{
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if (ttype(t1) != ttype(t2)) return 0;
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switch (ttype(t1)) {
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case LUA_T_NIL: return 1;
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case LUA_T_NUMBER: return nvalue(t1) == nvalue(t2);
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case LUA_T_STRING: case LUA_T_USERDATA: return svalue(t1) == svalue(t2);
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case LUA_T_ARRAY: return avalue(t1) == avalue(t2);
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case LUA_T_FUNCTION: return t1->value.cl == t2->value.cl;
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case LUA_T_CFUNCTION: return fvalue(t1) == fvalue(t2);
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default:
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lua_error("internal error in `lua_equalObj'");
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return 0; /* UNREACHEABLE */
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}
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}
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int luaO_findstring (char *name, char *list[])
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{
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int i;
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for (i=0; list[i]; i++)
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if (strcmp(list[i], name) == 0)
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return i;
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return -1; /* name not found */
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}
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