+++ /dev/null
-/*\r
-** $Id: ldblib.c,v 1.132.1.1 2013/04/12 18:48:47 roberto Exp $\r
-** Interface from Lua to its debug API\r
-** See Copyright Notice in lua.h\r
-*/\r
-\r
-\r
-#include <stdio.h>\r
-#include <stdlib.h>\r
-#include <string.h>\r
-\r
-#define ldblib_c\r
-#define LUA_LIB\r
-\r
-#include "lua.h"\r
-\r
-#include "lauxlib.h"\r
-#include "lualib.h"\r
-\r
-\r
-#define HOOKKEY "_HKEY"\r
-\r
-\r
-\r
-static int db_getregistry (lua_State *L) {\r
- lua_pushvalue(L, LUA_REGISTRYINDEX);\r
- return 1;\r
-}\r
-\r
-\r
-static int db_getmetatable (lua_State *L) {\r
- luaL_checkany(L, 1);\r
- if (!lua_getmetatable(L, 1)) {\r
- lua_pushnil(L); /* no metatable */\r
- }\r
- return 1;\r
-}\r
-\r
-\r
-static int db_setmetatable (lua_State *L) {\r
- int t = lua_type(L, 2);\r
- luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,\r
- "nil or table expected");\r
- lua_settop(L, 2);\r
- lua_setmetatable(L, 1);\r
- return 1; /* return 1st argument */\r
-}\r
-\r
-\r
-static int db_getuservalue (lua_State *L) {\r
- if (lua_type(L, 1) != LUA_TUSERDATA)\r
- lua_pushnil(L);\r
- else\r
- lua_getuservalue(L, 1);\r
- return 1;\r
-}\r
-\r
-\r
-static int db_setuservalue (lua_State *L) {\r
- if (lua_type(L, 1) == LUA_TLIGHTUSERDATA)\r
- luaL_argerror(L, 1, "full userdata expected, got light userdata");\r
- luaL_checktype(L, 1, LUA_TUSERDATA);\r
- if (!lua_isnoneornil(L, 2))\r
- luaL_checktype(L, 2, LUA_TTABLE);\r
- lua_settop(L, 2);\r
- lua_setuservalue(L, 1);\r
- return 1;\r
-}\r
-\r
-\r
-static void settabss (lua_State *L, const char *i, const char *v) {\r
- lua_pushstring(L, v);\r
- lua_setfield(L, -2, i);\r
-}\r
-\r
-\r
-static void settabsi (lua_State *L, const char *i, int v) {\r
- lua_pushinteger(L, v);\r
- lua_setfield(L, -2, i);\r
-}\r
-\r
-\r
-static void settabsb (lua_State *L, const char *i, int v) {\r
- lua_pushboolean(L, v);\r
- lua_setfield(L, -2, i);\r
-}\r
-\r
-\r
-static lua_State *getthread (lua_State *L, int *arg) {\r
- if (lua_isthread(L, 1)) {\r
- *arg = 1;\r
- return lua_tothread(L, 1);\r
- }\r
- else {\r
- *arg = 0;\r
- return L;\r
- }\r
-}\r
-\r
-\r
-static void treatstackoption (lua_State *L, lua_State *L1, const char *fname) {\r
- if (L == L1) {\r
- lua_pushvalue(L, -2);\r
- lua_remove(L, -3);\r
- }\r
- else\r
- lua_xmove(L1, L, 1);\r
- lua_setfield(L, -2, fname);\r
-}\r
-\r
-\r
-static int db_getinfo (lua_State *L) {\r
- lua_Debug ar;\r
- int arg;\r
- lua_State *L1 = getthread(L, &arg);\r
- const char *options = luaL_optstring(L, arg+2, "flnStu");\r
- if (lua_isnumber(L, arg+1)) {\r
- if (!lua_getstack(L1, (int)lua_tointeger(L, arg+1), &ar)) {\r
- lua_pushnil(L); /* level out of range */\r
- return 1;\r
- }\r
- }\r
- else if (lua_isfunction(L, arg+1)) {\r
- lua_pushfstring(L, ">%s", options);\r
- options = lua_tostring(L, -1);\r
- lua_pushvalue(L, arg+1);\r
- lua_xmove(L, L1, 1);\r
- }\r
- else\r
- return luaL_argerror(L, arg+1, "function or level expected");\r
- if (!lua_getinfo(L1, options, &ar))\r
- return luaL_argerror(L, arg+2, "invalid option");\r
- lua_createtable(L, 0, 2);\r
- if (strchr(options, 'S')) {\r
- settabss(L, "source", ar.source);\r
- settabss(L, "short_src", ar.short_src);\r
- settabsi(L, "linedefined", ar.linedefined);\r
- settabsi(L, "lastlinedefined", ar.lastlinedefined);\r
- settabss(L, "what", ar.what);\r
- }\r
- if (strchr(options, 'l'))\r
- settabsi(L, "currentline", ar.currentline);\r
- if (strchr(options, 'u')) {\r
- settabsi(L, "nups", ar.nups);\r
- settabsi(L, "nparams", ar.nparams);\r
- settabsb(L, "isvararg", ar.isvararg);\r
- }\r
- if (strchr(options, 'n')) {\r
- settabss(L, "name", ar.name);\r
- settabss(L, "namewhat", ar.namewhat);\r
- }\r
- if (strchr(options, 't'))\r
- settabsb(L, "istailcall", ar.istailcall);\r
- if (strchr(options, 'L'))\r
- treatstackoption(L, L1, "activelines");\r
- if (strchr(options, 'f'))\r
- treatstackoption(L, L1, "func");\r
- return 1; /* return table */\r
-}\r
-\r
-\r
-static int db_getlocal (lua_State *L) {\r
- int arg;\r
- lua_State *L1 = getthread(L, &arg);\r
- lua_Debug ar;\r
- const char *name;\r
- int nvar = luaL_checkint(L, arg+2); /* local-variable index */\r
- if (lua_isfunction(L, arg + 1)) { /* function argument? */\r
- lua_pushvalue(L, arg + 1); /* push function */\r
- lua_pushstring(L, lua_getlocal(L, NULL, nvar)); /* push local name */\r
- return 1;\r
- }\r
- else { /* stack-level argument */\r
- if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar)) /* out of range? */\r
- return luaL_argerror(L, arg+1, "level out of range");\r
- name = lua_getlocal(L1, &ar, nvar);\r
- if (name) {\r
- lua_xmove(L1, L, 1); /* push local value */\r
- lua_pushstring(L, name); /* push name */\r
- lua_pushvalue(L, -2); /* re-order */\r
- return 2;\r
- }\r
- else {\r
- lua_pushnil(L); /* no name (nor value) */\r
- return 1;\r
- }\r
- }\r
-}\r
-\r
-\r
-static int db_setlocal (lua_State *L) {\r
- int arg;\r
- lua_State *L1 = getthread(L, &arg);\r
- lua_Debug ar;\r
- if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar)) /* out of range? */\r
- return luaL_argerror(L, arg+1, "level out of range");\r
- luaL_checkany(L, arg+3);\r
- lua_settop(L, arg+3);\r
- lua_xmove(L, L1, 1);\r
- lua_pushstring(L, lua_setlocal(L1, &ar, luaL_checkint(L, arg+2)));\r
- return 1;\r
-}\r
-\r
-\r
-static int auxupvalue (lua_State *L, int get) {\r
- const char *name;\r
- int n = luaL_checkint(L, 2);\r
- luaL_checktype(L, 1, LUA_TFUNCTION);\r
- name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n);\r
- if (name == NULL) return 0;\r
- lua_pushstring(L, name);\r
- lua_insert(L, -(get+1));\r
- return get + 1;\r
-}\r
-\r
-\r
-static int db_getupvalue (lua_State *L) {\r
- return auxupvalue(L, 1);\r
-}\r
-\r
-\r
-static int db_setupvalue (lua_State *L) {\r
- luaL_checkany(L, 3);\r
- return auxupvalue(L, 0);\r
-}\r
-\r
-\r
-static int checkupval (lua_State *L, int argf, int argnup) {\r
- lua_Debug ar;\r
- int nup = luaL_checkint(L, argnup);\r
- luaL_checktype(L, argf, LUA_TFUNCTION);\r
- lua_pushvalue(L, argf);\r
- lua_getinfo(L, ">u", &ar);\r
- luaL_argcheck(L, 1 <= nup && nup <= ar.nups, argnup, "invalid upvalue index");\r
- return nup;\r
-}\r
-\r
-\r
-static int db_upvalueid (lua_State *L) {\r
- int n = checkupval(L, 1, 2);\r
- lua_pushlightuserdata(L, lua_upvalueid(L, 1, n));\r
- return 1;\r
-}\r
-\r
-\r
-static int db_upvaluejoin (lua_State *L) {\r
- int n1 = checkupval(L, 1, 2);\r
- int n2 = checkupval(L, 3, 4);\r
- luaL_argcheck(L, !lua_iscfunction(L, 1), 1, "Lua function expected");\r
- luaL_argcheck(L, !lua_iscfunction(L, 3), 3, "Lua function expected");\r
- lua_upvaluejoin(L, 1, n1, 3, n2);\r
- return 0;\r
-}\r
-\r
-\r
-#define gethooktable(L) luaL_getsubtable(L, LUA_REGISTRYINDEX, HOOKKEY)\r
-\r
-\r
-static void hookf (lua_State *L, lua_Debug *ar) {\r
- static const char *const hooknames[] =\r
- {"call", "return", "line", "count", "tail call"};\r
- gethooktable(L);\r
- lua_pushthread(L);\r
- lua_rawget(L, -2);\r
- if (lua_isfunction(L, -1)) {\r
- lua_pushstring(L, hooknames[(int)ar->event]);\r
- if (ar->currentline >= 0)\r
- lua_pushinteger(L, ar->currentline);\r
- else lua_pushnil(L);\r
- lua_assert(lua_getinfo(L, "lS", ar));\r
- lua_call(L, 2, 0);\r
- }\r
-}\r
-\r
-\r
-static int makemask (const char *smask, int count) {\r
- int mask = 0;\r
- if (strchr(smask, 'c')) mask |= LUA_MASKCALL;\r
- if (strchr(smask, 'r')) mask |= LUA_MASKRET;\r
- if (strchr(smask, 'l')) mask |= LUA_MASKLINE;\r
- if (count > 0) mask |= LUA_MASKCOUNT;\r
- return mask;\r
-}\r
-\r
-\r
-static char *unmakemask (int mask, char *smask) {\r
- int i = 0;\r
- if (mask & LUA_MASKCALL) smask[i++] = 'c';\r
- if (mask & LUA_MASKRET) smask[i++] = 'r';\r
- if (mask & LUA_MASKLINE) smask[i++] = 'l';\r
- smask[i] = '\0';\r
- return smask;\r
-}\r
-\r
-\r
-static int db_sethook (lua_State *L) {\r
- int arg, mask, count;\r
- lua_Hook func;\r
- lua_State *L1 = getthread(L, &arg);\r
- if (lua_isnoneornil(L, arg+1)) {\r
- lua_settop(L, arg+1);\r
- func = NULL; mask = 0; count = 0; /* turn off hooks */\r
- }\r
- else {\r
- const char *smask = luaL_checkstring(L, arg+2);\r
- luaL_checktype(L, arg+1, LUA_TFUNCTION);\r
- count = luaL_optint(L, arg+3, 0);\r
- func = hookf; mask = makemask(smask, count);\r
- }\r
- if (gethooktable(L) == 0) { /* creating hook table? */\r
- lua_pushstring(L, "k");\r
- lua_setfield(L, -2, "__mode"); /** hooktable.__mode = "k" */\r
- lua_pushvalue(L, -1);\r
- lua_setmetatable(L, -2); /* setmetatable(hooktable) = hooktable */\r
- }\r
- lua_pushthread(L1); lua_xmove(L1, L, 1);\r
- lua_pushvalue(L, arg+1);\r
- lua_rawset(L, -3); /* set new hook */\r
- lua_sethook(L1, func, mask, count); /* set hooks */\r
- return 0;\r
-}\r
-\r
-\r
-static int db_gethook (lua_State *L) {\r
- int arg;\r
- lua_State *L1 = getthread(L, &arg);\r
- char buff[5];\r
- int mask = lua_gethookmask(L1);\r
- lua_Hook hook = lua_gethook(L1);\r
- if (hook != NULL && hook != hookf) /* external hook? */\r
- lua_pushliteral(L, "external hook");\r
- else {\r
- gethooktable(L);\r
- lua_pushthread(L1); lua_xmove(L1, L, 1);\r
- lua_rawget(L, -2); /* get hook */\r
- lua_remove(L, -2); /* remove hook table */\r
- }\r
- lua_pushstring(L, unmakemask(mask, buff));\r
- lua_pushinteger(L, lua_gethookcount(L1));\r
- return 3;\r
-}\r
-\r
-\r
-static int db_debug (lua_State *L) {\r
- for (;;) {\r
- char buffer[250];\r
- luai_writestringerror("%s", "lua_debug> ");\r
- if (fgets(buffer, sizeof(buffer), stdin) == 0 ||\r
- strcmp(buffer, "cont\n") == 0)\r
- return 0;\r
- if (luaL_loadbuffer(L, buffer, strlen(buffer), "=(debug command)") ||\r
- lua_pcall(L, 0, 0, 0))\r
- luai_writestringerror("%s\n", lua_tostring(L, -1));\r
- lua_settop(L, 0); /* remove eventual returns */\r
- }\r
-}\r
-\r
-\r
-static int db_traceback (lua_State *L) {\r
- int arg;\r
- lua_State *L1 = getthread(L, &arg);\r
- const char *msg = lua_tostring(L, arg + 1);\r
- if (msg == NULL && !lua_isnoneornil(L, arg + 1)) /* non-string 'msg'? */\r
- lua_pushvalue(L, arg + 1); /* return it untouched */\r
- else {\r
- int level = luaL_optint(L, arg + 2, (L == L1) ? 1 : 0);\r
- luaL_traceback(L, L1, msg, level);\r
- }\r
- return 1;\r
-}\r
-\r
-\r
-static const luaL_Reg dblib[] = {\r
- {"debug", db_debug},\r
- {"getuservalue", db_getuservalue},\r
- {"gethook", db_gethook},\r
- {"getinfo", db_getinfo},\r
- {"getlocal", db_getlocal},\r
- {"getregistry", db_getregistry},\r
- {"getmetatable", db_getmetatable},\r
- {"getupvalue", db_getupvalue},\r
- {"upvaluejoin", db_upvaluejoin},\r
- {"upvalueid", db_upvalueid},\r
- {"setuservalue", db_setuservalue},\r
- {"sethook", db_sethook},\r
- {"setlocal", db_setlocal},\r
- {"setmetatable", db_setmetatable},\r
- {"setupvalue", db_setupvalue},\r
- {"traceback", db_traceback},\r
- {NULL, NULL}\r
-};\r
-\r
-\r
-LUAMOD_API int luaopen_debug (lua_State *L) {\r
- luaL_newlib(L, dblib);\r
- return 1;\r
-}\r
-\r
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