diff options
author | 2015-01-13 17:59:12 +0100 | |
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committer | 2015-01-13 17:59:12 +0100 | |
commit | d60dc40fe37bbc90eecea9c0ebb1f932df38ab0b (patch) | |
tree | 34ba59a47662984394b88249db7c8103b05793c2 /3rdparty/lua/src/ldblib.c | |
parent | b1876ae1a347c07d176bcb381d4ef54fcbd897c7 (diff) |
Update to Lua 5.3
Diffstat (limited to '3rdparty/lua/src/ldblib.c')
-rw-r--r-- | 3rdparty/lua/src/ldblib.c | 213 |
1 files changed, 126 insertions, 87 deletions
diff --git a/3rdparty/lua/src/ldblib.c b/3rdparty/lua/src/ldblib.c index 84fe3c7d823..24a11b53ee3 100644 --- a/3rdparty/lua/src/ldblib.c +++ b/3rdparty/lua/src/ldblib.c @@ -1,25 +1,30 @@ /* -** $Id: ldblib.c,v 1.132.1.1 2013/04/12 18:48:47 roberto Exp $ +** $Id: ldblib.c,v 1.148 2015/01/02 12:52:22 roberto Exp $ ** Interface from Lua to its debug API ** See Copyright Notice in lua.h */ +#define ldblib_c +#define LUA_LIB + +#include "lprefix.h" + #include <stdio.h> #include <stdlib.h> #include <string.h> -#define ldblib_c -#define LUA_LIB - #include "lua.h" #include "lauxlib.h" #include "lualib.h" -#define HOOKKEY "_HKEY" - +/* +** The hook table at registry[&HOOKKEY] maps threads to their current +** hook function. (We only need the unique address of 'HOOKKEY'.) +*/ +static const int HOOKKEY = 0; static int db_getregistry (lua_State *L) { @@ -57,35 +62,20 @@ static int db_getuservalue (lua_State *L) { static int db_setuservalue (lua_State *L) { - if (lua_type(L, 1) == LUA_TLIGHTUSERDATA) - luaL_argerror(L, 1, "full userdata expected, got light userdata"); luaL_checktype(L, 1, LUA_TUSERDATA); - if (!lua_isnoneornil(L, 2)) - luaL_checktype(L, 2, LUA_TTABLE); + luaL_checkany(L, 2); lua_settop(L, 2); lua_setuservalue(L, 1); return 1; } -static void settabss (lua_State *L, const char *i, const char *v) { - lua_pushstring(L, v); - lua_setfield(L, -2, i); -} - - -static void settabsi (lua_State *L, const char *i, int v) { - lua_pushinteger(L, v); - lua_setfield(L, -2, i); -} - - -static void settabsb (lua_State *L, const char *i, int v) { - lua_pushboolean(L, v); - lua_setfield(L, -2, i); -} - - +/* +** Auxiliary function used by several library functions: check for +** an optional thread as function's first argument and set 'arg' with +** 1 if this argument is present (so that functions can skip it to +** access their other arguments) +*/ static lua_State *getthread (lua_State *L, int *arg) { if (lua_isthread(L, 1)) { *arg = 1; @@ -93,44 +83,70 @@ static lua_State *getthread (lua_State *L, int *arg) { } else { *arg = 0; - return L; + return L; /* function will operate over current thread */ } } +/* +** Variations of 'lua_settable', used by 'db_getinfo' to put results +** from 'lua_getinfo' into result table. Key is always a string; +** value can be a string, an int, or a boolean. +*/ +static void settabss (lua_State *L, const char *k, const char *v) { + lua_pushstring(L, v); + lua_setfield(L, -2, k); +} + +static void settabsi (lua_State *L, const char *k, int v) { + lua_pushinteger(L, v); + lua_setfield(L, -2, k); +} + +static void settabsb (lua_State *L, const char *k, int v) { + lua_pushboolean(L, v); + lua_setfield(L, -2, k); +} + + +/* +** In function 'db_getinfo', the call to 'lua_getinfo' may push +** results on the stack; later it creates the result table to put +** these objects. Function 'treatstackoption' puts the result from +** 'lua_getinfo' on top of the result table so that it can call +** 'lua_setfield'. +*/ static void treatstackoption (lua_State *L, lua_State *L1, const char *fname) { - if (L == L1) { - lua_pushvalue(L, -2); - lua_remove(L, -3); - } + if (L == L1) + lua_rotate(L, -2, 1); /* exchange object and table */ else - lua_xmove(L1, L, 1); - lua_setfield(L, -2, fname); + lua_xmove(L1, L, 1); /* move object to the "main" stack */ + lua_setfield(L, -2, fname); /* put object into table */ } +/* +** Calls 'lua_getinfo' and collects all results in a new table. +*/ static int db_getinfo (lua_State *L) { lua_Debug ar; int arg; lua_State *L1 = getthread(L, &arg); const char *options = luaL_optstring(L, arg+2, "flnStu"); - if (lua_isnumber(L, arg+1)) { - if (!lua_getstack(L1, (int)lua_tointeger(L, arg+1), &ar)) { + if (lua_isfunction(L, arg + 1)) { /* info about a function? */ + options = lua_pushfstring(L, ">%s", options); /* add '>' to 'options' */ + lua_pushvalue(L, arg + 1); /* move function to 'L1' stack */ + lua_xmove(L, L1, 1); + } + else { /* stack level */ + if (!lua_getstack(L1, (int)luaL_checkinteger(L, arg + 1), &ar)) { lua_pushnil(L); /* level out of range */ return 1; } } - else if (lua_isfunction(L, arg+1)) { - lua_pushfstring(L, ">%s", options); - options = lua_tostring(L, -1); - lua_pushvalue(L, arg+1); - lua_xmove(L, L1, 1); - } - else - return luaL_argerror(L, arg+1, "function or level expected"); if (!lua_getinfo(L1, options, &ar)) return luaL_argerror(L, arg+2, "invalid option"); - lua_createtable(L, 0, 2); + lua_newtable(L); /* table to collect results */ if (strchr(options, 'S')) { settabss(L, "source", ar.source); settabss(L, "short_src", ar.short_src); @@ -164,20 +180,21 @@ static int db_getlocal (lua_State *L) { lua_State *L1 = getthread(L, &arg); lua_Debug ar; const char *name; - int nvar = luaL_checkint(L, arg+2); /* local-variable index */ + int nvar = (int)luaL_checkinteger(L, arg + 2); /* local-variable index */ if (lua_isfunction(L, arg + 1)) { /* function argument? */ lua_pushvalue(L, arg + 1); /* push function */ lua_pushstring(L, lua_getlocal(L, NULL, nvar)); /* push local name */ - return 1; + return 1; /* return only name (there is no value) */ } else { /* stack-level argument */ - if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar)) /* out of range? */ + int level = (int)luaL_checkinteger(L, arg + 1); + if (!lua_getstack(L1, level, &ar)) /* out of range? */ return luaL_argerror(L, arg+1, "level out of range"); name = lua_getlocal(L1, &ar, nvar); if (name) { - lua_xmove(L1, L, 1); /* push local value */ + lua_xmove(L1, L, 1); /* move local value */ lua_pushstring(L, name); /* push name */ - lua_pushvalue(L, -2); /* re-order */ + lua_rotate(L, -2, 1); /* re-order */ return 2; } else { @@ -190,26 +207,35 @@ static int db_getlocal (lua_State *L) { static int db_setlocal (lua_State *L) { int arg; + const char *name; lua_State *L1 = getthread(L, &arg); lua_Debug ar; - if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar)) /* out of range? */ + int level = (int)luaL_checkinteger(L, arg + 1); + int nvar = (int)luaL_checkinteger(L, arg + 2); + if (!lua_getstack(L1, level, &ar)) /* out of range? */ return luaL_argerror(L, arg+1, "level out of range"); luaL_checkany(L, arg+3); lua_settop(L, arg+3); lua_xmove(L, L1, 1); - lua_pushstring(L, lua_setlocal(L1, &ar, luaL_checkint(L, arg+2))); + name = lua_setlocal(L1, &ar, nvar); + if (name == NULL) + lua_pop(L1, 1); /* pop value (if not popped by 'lua_setlocal') */ + lua_pushstring(L, name); return 1; } +/* +** get (if 'get' is true) or set an upvalue from a closure +*/ static int auxupvalue (lua_State *L, int get) { const char *name; - int n = luaL_checkint(L, 2); - luaL_checktype(L, 1, LUA_TFUNCTION); + int n = (int)luaL_checkinteger(L, 2); /* upvalue index */ + luaL_checktype(L, 1, LUA_TFUNCTION); /* closure */ name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n); if (name == NULL) return 0; lua_pushstring(L, name); - lua_insert(L, -(get+1)); + lua_insert(L, -(get+1)); /* no-op if get is false */ return get + 1; } @@ -225,13 +251,15 @@ static int db_setupvalue (lua_State *L) { } +/* +** Check whether a given upvalue from a given closure exists and +** returns its index +*/ static int checkupval (lua_State *L, int argf, int argnup) { - lua_Debug ar; - int nup = luaL_checkint(L, argnup); - luaL_checktype(L, argf, LUA_TFUNCTION); - lua_pushvalue(L, argf); - lua_getinfo(L, ">u", &ar); - luaL_argcheck(L, 1 <= nup && nup <= ar.nups, argnup, "invalid upvalue index"); + int nup = (int)luaL_checkinteger(L, argnup); /* upvalue index */ + luaL_checktype(L, argf, LUA_TFUNCTION); /* closure */ + luaL_argcheck(L, (lua_getupvalue(L, argf, nup) != NULL), argnup, + "invalid upvalue index"); return nup; } @@ -253,26 +281,29 @@ static int db_upvaluejoin (lua_State *L) { } -#define gethooktable(L) luaL_getsubtable(L, LUA_REGISTRYINDEX, HOOKKEY) - - +/* +** Call hook function registered at hook table for the current +** thread (if there is one) +*/ static void hookf (lua_State *L, lua_Debug *ar) { static const char *const hooknames[] = {"call", "return", "line", "count", "tail call"}; - gethooktable(L); + lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY); lua_pushthread(L); - lua_rawget(L, -2); - if (lua_isfunction(L, -1)) { - lua_pushstring(L, hooknames[(int)ar->event]); + if (lua_rawget(L, -2) == LUA_TFUNCTION) { /* is there a hook function? */ + lua_pushstring(L, hooknames[(int)ar->event]); /* push event name */ if (ar->currentline >= 0) - lua_pushinteger(L, ar->currentline); + lua_pushinteger(L, ar->currentline); /* push current line */ else lua_pushnil(L); lua_assert(lua_getinfo(L, "lS", ar)); - lua_call(L, 2, 0); + lua_call(L, 2, 0); /* call hook function */ } } +/* +** Convert a string mask (for 'sethook') into a bit mask +*/ static int makemask (const char *smask, int count) { int mask = 0; if (strchr(smask, 'c')) mask |= LUA_MASKCALL; @@ -283,6 +314,9 @@ static int makemask (const char *smask, int count) { } +/* +** Convert a bit mask (for 'gethook') into a string mask +*/ static char *unmakemask (int mask, char *smask) { int i = 0; if (mask & LUA_MASKCALL) smask[i++] = 'c'; @@ -297,26 +331,29 @@ static int db_sethook (lua_State *L) { int arg, mask, count; lua_Hook func; lua_State *L1 = getthread(L, &arg); - if (lua_isnoneornil(L, arg+1)) { + if (lua_isnoneornil(L, arg+1)) { /* no hook? */ lua_settop(L, arg+1); func = NULL; mask = 0; count = 0; /* turn off hooks */ } else { const char *smask = luaL_checkstring(L, arg+2); luaL_checktype(L, arg+1, LUA_TFUNCTION); - count = luaL_optint(L, arg+3, 0); + count = (int)luaL_optinteger(L, arg + 3, 0); func = hookf; mask = makemask(smask, count); } - if (gethooktable(L) == 0) { /* creating hook table? */ + if (lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY) == LUA_TNIL) { + lua_createtable(L, 0, 2); /* create a hook table */ + lua_pushvalue(L, -1); + lua_rawsetp(L, LUA_REGISTRYINDEX, &HOOKKEY); /* set it in position */ lua_pushstring(L, "k"); lua_setfield(L, -2, "__mode"); /** hooktable.__mode = "k" */ lua_pushvalue(L, -1); lua_setmetatable(L, -2); /* setmetatable(hooktable) = hooktable */ } - lua_pushthread(L1); lua_xmove(L1, L, 1); - lua_pushvalue(L, arg+1); - lua_rawset(L, -3); /* set new hook */ - lua_sethook(L1, func, mask, count); /* set hooks */ + lua_pushthread(L1); lua_xmove(L1, L, 1); /* key (thread) */ + lua_pushvalue(L, arg + 1); /* value (hook function) */ + lua_rawset(L, -3); /* hooktable[L1] = new Lua hook */ + lua_sethook(L1, func, mask, count); return 0; } @@ -327,16 +364,18 @@ static int db_gethook (lua_State *L) { char buff[5]; int mask = lua_gethookmask(L1); lua_Hook hook = lua_gethook(L1); - if (hook != NULL && hook != hookf) /* external hook? */ + if (hook == NULL) /* no hook? */ + lua_pushnil(L); + else if (hook != hookf) /* external hook? */ lua_pushliteral(L, "external hook"); - else { - gethooktable(L); + else { /* hook table must exist */ + lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY); lua_pushthread(L1); lua_xmove(L1, L, 1); - lua_rawget(L, -2); /* get hook */ + lua_rawget(L, -2); /* 1st result = hooktable[L1] */ lua_remove(L, -2); /* remove hook table */ } - lua_pushstring(L, unmakemask(mask, buff)); - lua_pushinteger(L, lua_gethookcount(L1)); + lua_pushstring(L, unmakemask(mask, buff)); /* 2nd result = mask */ + lua_pushinteger(L, lua_gethookcount(L1)); /* 3rd result = count */ return 3; } @@ -344,13 +383,13 @@ static int db_gethook (lua_State *L) { static int db_debug (lua_State *L) { for (;;) { char buffer[250]; - luai_writestringerror("%s", "lua_debug> "); + lua_writestringerror("%s", "lua_debug> "); if (fgets(buffer, sizeof(buffer), stdin) == 0 || strcmp(buffer, "cont\n") == 0) return 0; if (luaL_loadbuffer(L, buffer, strlen(buffer), "=(debug command)") || lua_pcall(L, 0, 0, 0)) - luai_writestringerror("%s\n", lua_tostring(L, -1)); + lua_writestringerror("%s\n", lua_tostring(L, -1)); lua_settop(L, 0); /* remove eventual returns */ } } @@ -363,7 +402,7 @@ static int db_traceback (lua_State *L) { if (msg == NULL && !lua_isnoneornil(L, arg + 1)) /* non-string 'msg'? */ lua_pushvalue(L, arg + 1); /* return it untouched */ else { - int level = luaL_optint(L, arg + 2, (L == L1) ? 1 : 0); + int level = (int)luaL_optinteger(L, arg + 2, (L == L1) ? 1 : 0); luaL_traceback(L, L1, msg, level); } return 1; |