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Pull #91: move is_XXX and to_bool into pl.types
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| /* | ||
| * lint64.c | ||
| * int64 nummbers for Lua | ||
| * Luiz Henrique de Figueiredo <lhf@tecgraf.puc-rio.br> | ||
| * Thu Aug 1 22:56:17 BRT 2013 | ||
| * This code is hereby placed in the public domain. | ||
| */ | ||
|
|
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| #include <stdlib.h> | ||
|
|
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| #define Int long long | ||
|
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| #include "lua.h" | ||
| #include "lauxlib.h" | ||
|
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| #define MYNAME "int64" | ||
| #define MYTYPE MYNAME | ||
| #define MYVERSION MYTYPE " library for " LUA_VERSION " / Aug 2013" | ||
|
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| #define Z(i) Pget(L,i) | ||
| #define O(i) luaL_optnumber(L,i,0) | ||
|
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| #define add(z,w) ((z)+(w)) | ||
| #define sub(z,w) ((z)-(w)) | ||
| #define mul(z,w) ((z)*(w)) | ||
| #define div(z,w) ((z)/(w)) | ||
| #define neg(z) (-(z)) | ||
| #define new(z) (z) | ||
|
|
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| static Int Pget(lua_State *L, int i) | ||
| { | ||
| switch (lua_type(L,i)) | ||
| { | ||
| case LUA_TNUMBER: | ||
| return luaL_checkint(L,i); | ||
| case LUA_TSTRING: | ||
| return atoll(luaL_checkstring(L,i)); | ||
| default: | ||
| return *((Int*)luaL_checkudata(L,i,MYTYPE)); | ||
| } | ||
| } | ||
|
|
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| static int pushInt(lua_State *L, Int z) | ||
| { | ||
| Int *p=lua_newuserdata(L,sizeof(Int)); | ||
| *p=z; | ||
| luaL_setmetatable(L,MYTYPE); | ||
| return 1; | ||
| } | ||
|
|
||
| static int Leq(lua_State *L) /** __eq(z,w) */ | ||
| { | ||
| lua_pushboolean(L,Z(1)==Z(2)); | ||
| return 1; | ||
| } | ||
|
|
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| static int Llt(lua_State *L) /** __lt(z,w) */ | ||
| { | ||
| lua_pushboolean(L,Z(1)<Z(2)); | ||
| return 1; | ||
| } | ||
|
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| static int Ltostring(lua_State *L) /** __tostring(z) */ | ||
| { | ||
| char b[100]; | ||
| sprintf(b,"%lld",Z(1)); | ||
| lua_pushstring(L,b); | ||
| return 1; | ||
| } | ||
|
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| #define A(f,e) static int L##f(lua_State *L) { return pushInt(L,e); } | ||
| #define B(f) A(f,f(Z(1),Z(2))) | ||
| #define F(f) A(f,f(Z(1))) | ||
|
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| B(add) /** __add(z,w) */ | ||
| B(div) /** __div(z,w) */ | ||
| B(mul) /** __mul(z,w) */ | ||
| B(sub) /** __sub(z,w) */ | ||
| F(neg) /** __unm(z) */ | ||
| F(new) /** new(z) */ | ||
|
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| static const luaL_Reg R[] = | ||
| { | ||
| { "__add", Ladd }, | ||
| { "__div", Ldiv }, | ||
| { "__eq", Leq }, | ||
| { "__lt", Llt }, | ||
| { "__mul", Lmul }, | ||
| { "__sub", Lsub }, | ||
| { "__unm", Lneg }, | ||
| { "__tostring", Ltostring}, | ||
| { "new", Lnew }, | ||
| { NULL, NULL } | ||
| }; | ||
|
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| LUALIB_API int luaopen_int64(lua_State *L) | ||
| { | ||
| if (sizeof(Int)!=8) luaL_error(L,"Int has %d bytes but expected 8",sizeof(Int)); | ||
| luaL_newmetatable(L,MYTYPE); | ||
| luaL_setfuncs(L,R,0); | ||
| lua_pushliteral(L,"version"); /** version */ | ||
| lua_pushliteral(L,MYVERSION); | ||
| lua_settable(L,-3); | ||
| lua_pushliteral(L,"__index"); | ||
| lua_pushvalue(L,-2); | ||
| lua_settable(L,-3); | ||
| return 1; | ||
| } |
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