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41 lines
1.4 KiB
41 lines
1.4 KiB
#include "lua_hdr.h"
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#define LUA_TSTRING 4
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#define LUA_TSHRSTR (LUA_TSTRING | (0 << 4))
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#define checktag(o,t) (rttype(o) == (t))
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#define ctb(t) ((t) | BIT_ISCOLLECTABLE)
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#define cast(t, exp) ((t)(exp))
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#define lmod(s,size) \
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(cast(int, (s) & ((size)-1)))
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#define ttisshrstring(o) checktag((o), ctb(LUA_TSHRSTR))
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#define gco2ts(o) cast(struct TString *, (o))
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#define val_(o) ((o)->value_)
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#define tsvalue(o) gco2ts(val_(o).gc)
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#define gnode(t,i) (&(t)->node[i])
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#define gval(n) (&(n)->i_val)
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#define gkey(n) cast(const struct TValue*, (&(n)->i_key.tvk))
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#define twoto(x) (1<<(x))
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#define sizenode(t) (twoto((t)->lsizenode))
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//#define hashpow2(t,n) (gnode(t, lmod((n), sizenode(t))))
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// Following uses cached hmask which is basically precomputed lmod()
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#define hashpow2(t, h) (gnode(t, (h & (t)->hmask)))
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#define hashstr(t,str) hashpow2(t, (str)->hash)
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#define eqshrstr(a,b) ((a) == (b))
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extern const struct TValue *luaH_getstr (struct Table *t, struct TString *key);
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const struct TValue *ravi_getstr (struct Table *t, struct TString *key) {
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struct Node *n = hashstr(t, key);
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const struct TValue *k = gkey(n);
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if (ttisshrstring(k) && eqshrstr(tsvalue(k), key))
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return gval(n); /* that's it */
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return luaH_getstr(t, key);
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}
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