diff options
Diffstat (limited to 'lib/lua/src/LuaLib/ldblib.c')
| -rw-r--r-- | lib/lua/src/LuaLib/ldblib.c | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/lib/lua/src/LuaLib/ldblib.c b/lib/lua/src/LuaLib/ldblib.c new file mode 100644 index 0000000..44ab052 --- /dev/null +++ b/lib/lua/src/LuaLib/ldblib.c @@ -0,0 +1,299 @@ +/*
+** $Id: ldblib.c,v 1.1 2003-11-06 11:56:07 pixel Exp $
+** Interface from Lua to its debug API
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define ldblib_c
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+
+static void settabss (lua_State *L, const char *i, const char *v) {
+ lua_pushstring(L, i);
+ lua_pushstring(L, v);
+ lua_rawset(L, -3);
+}
+
+
+static void settabsi (lua_State *L, const char *i, int v) {
+ lua_pushstring(L, i);
+ lua_pushnumber(L, (lua_Number)v);
+ lua_rawset(L, -3);
+}
+
+
+static int getinfo (lua_State *L) {
+ lua_Debug ar;
+ const char *options = luaL_optstring(L, 2, "flnSu");
+ if (lua_isnumber(L, 1)) {
+ if (!lua_getstack(L, (int)(lua_tonumber(L, 1)), &ar)) {
+ lua_pushnil(L); /* level out of range */
+ return 1;
+ }
+ }
+ else if (lua_isfunction(L, 1)) {
+ lua_pushfstring(L, ">%s", options);
+ options = lua_tostring(L, -1);
+ lua_pushvalue(L, 1);
+ }
+ else
+ return luaL_argerror(L, 1, "function or level expected");
+ if (!lua_getinfo(L, options, &ar))
+ return luaL_argerror(L, 2, "invalid option");
+ lua_newtable(L);
+ for (; *options; options++) {
+ switch (*options) {
+ case 'S':
+ settabss(L, "source", ar.source);
+ settabss(L, "short_src", ar.short_src);
+ settabsi(L, "linedefined", ar.linedefined);
+ settabss(L, "what", ar.what);
+ break;
+ case 'l':
+ settabsi(L, "currentline", ar.currentline);
+ break;
+ case 'u':
+ settabsi(L, "nups", ar.nups);
+ break;
+ case 'n':
+ settabss(L, "name", ar.name);
+ settabss(L, "namewhat", ar.namewhat);
+ break;
+ case 'f':
+ lua_pushliteral(L, "func");
+ lua_pushvalue(L, -3);
+ lua_rawset(L, -3);
+ break;
+ }
+ }
+ return 1; /* return table */
+}
+
+
+static int getlocal (lua_State *L) {
+ lua_Debug ar;
+ const char *name;
+ if (!lua_getstack(L, luaL_checkint(L, 1), &ar)) /* level out of range? */
+ return luaL_argerror(L, 1, "level out of range");
+ name = lua_getlocal(L, &ar, luaL_checkint(L, 2));
+ if (name) {
+ lua_pushstring(L, name);
+ lua_pushvalue(L, -2);
+ return 2;
+ }
+ else {
+ lua_pushnil(L);
+ return 1;
+ }
+}
+
+
+static int setlocal (lua_State *L) {
+ lua_Debug ar;
+ if (!lua_getstack(L, luaL_checkint(L, 1), &ar)) /* level out of range? */
+ return luaL_argerror(L, 1, "level out of range");
+ luaL_checkany(L, 3);
+ lua_pushstring(L, lua_setlocal(L, &ar, luaL_checkint(L, 2)));
+ return 1;
+}
+
+
+static int auxupvalue (lua_State *L, int get) {
+ const char *name;
+ int n = luaL_checkint(L, 2);
+ luaL_checktype(L, 1, LUA_TFUNCTION);
+ if (lua_iscfunction(L, 1)) return 0; /* cannot touch C upvalues from Lua */
+ 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));
+ return get + 1;
+}
+
+
+static int getupvalue (lua_State *L) {
+ return auxupvalue(L, 1);
+}
+
+
+static int setupvalue (lua_State *L) {
+ luaL_checkany(L, 3);
+ return auxupvalue(L, 0);
+}
+
+
+
+static const char KEY_HOOK = 'h';
+
+
+static void hookf (lua_State *L, lua_Debug *ar) {
+ static const char *const hooknames[] =
+ {"call", "return", "line", "count", "tail return"};
+ lua_pushlightuserdata(L, (void *)&KEY_HOOK);
+ lua_rawget(L, LUA_REGISTRYINDEX);
+ if (lua_isfunction(L, -1)) {
+ lua_pushstring(L, hooknames[(int)ar->event]);
+ if (ar->currentline >= 0)
+ lua_pushnumber(L, (lua_Number)ar->currentline);
+ else lua_pushnil(L);
+ lua_assert(lua_getinfo(L, "lS", ar));
+ lua_call(L, 2, 0);
+ }
+ else
+ lua_pop(L, 1); /* pop result from gettable */
+}
+
+
+static int makemask (const char *smask, int count) {
+ int mask = 0;
+ if (strchr(smask, 'c')) mask |= LUA_MASKCALL;
+ if (strchr(smask, 'r')) mask |= LUA_MASKRET;
+ if (strchr(smask, 'l')) mask |= LUA_MASKLINE;
+ if (count > 0) mask |= LUA_MASKCOUNT;
+ return mask;
+}
+
+
+static char *unmakemask (int mask, char *smask) {
+ int i = 0;
+ if (mask & LUA_MASKCALL) smask[i++] = 'c';
+ if (mask & LUA_MASKRET) smask[i++] = 'r';
+ if (mask & LUA_MASKLINE) smask[i++] = 'l';
+ smask[i] = '\0';
+ return smask;
+}
+
+
+static int sethook (lua_State *L) {
+ if (lua_isnoneornil(L, 1)) {
+ lua_settop(L, 1);
+ lua_sethook(L, NULL, 0, 0); /* turn off hooks */
+ }
+ else {
+ const char *smask = luaL_checkstring(L, 2);
+ int count = luaL_optint(L, 3, 0);
+ luaL_checktype(L, 1, LUA_TFUNCTION);
+ lua_sethook(L, hookf, makemask(smask, count), count);
+ }
+ lua_pushlightuserdata(L, (void *)&KEY_HOOK);
+ lua_pushvalue(L, 1);
+ lua_rawset(L, LUA_REGISTRYINDEX); /* set new hook */
+ return 0;
+}
+
+
+static int gethook (lua_State *L) {
+ char buff[5];
+ int mask = lua_gethookmask(L);
+ lua_Hook hook = lua_gethook(L);
+ if (hook != NULL && hook != hookf) /* external hook? */
+ lua_pushliteral(L, "external hook");
+ else {
+ lua_pushlightuserdata(L, (void *)&KEY_HOOK);
+ lua_rawget(L, LUA_REGISTRYINDEX); /* get hook */
+ }
+ lua_pushstring(L, unmakemask(mask, buff));
+ lua_pushnumber(L, (lua_Number)lua_gethookcount(L));
+ return 3;
+}
+
+
+static int debug (lua_State *L) {
+ for (;;) {
+ char buffer[250];
+ fputs("lua_debug> ", stderr);
+ if (fgets(buffer, sizeof(buffer), stdin) == 0 ||
+ strcmp(buffer, "cont\n") == 0)
+ return 0;
+ lua_dostring(L, buffer);
+ lua_settop(L, 0); /* remove eventual returns */
+ }
+}
+
+
+#define LEVELS1 12 /* size of the first part of the stack */
+#define LEVELS2 10 /* size of the second part of the stack */
+
+static int errorfb (lua_State *L) {
+ int level = 1; /* skip level 0 (it's this function) */
+ int firstpart = 1; /* still before eventual `...' */
+ lua_Debug ar;
+ if (lua_gettop(L) == 0)
+ lua_pushliteral(L, "");
+ else if (!lua_isstring(L, 1)) return 1; /* no string message */
+ else lua_pushliteral(L, "\n");
+ lua_pushliteral(L, "stack traceback:");
+ while (lua_getstack(L, level++, &ar)) {
+ if (level > LEVELS1 && firstpart) {
+ /* no more than `LEVELS2' more levels? */
+ if (!lua_getstack(L, level+LEVELS2, &ar))
+ level--; /* keep going */
+ else {
+ lua_pushliteral(L, "\n\t..."); /* too many levels */
+ while (lua_getstack(L, level+LEVELS2, &ar)) /* find last levels */
+ level++;
+ }
+ firstpart = 0;
+ continue;
+ }
+ lua_pushliteral(L, "\n\t");
+ lua_getinfo(L, "Snl", &ar);
+ lua_pushfstring(L, "%s:", ar.short_src);
+ if (ar.currentline > 0)
+ lua_pushfstring(L, "%d:", ar.currentline);
+ switch (*ar.namewhat) {
+ case 'g': /* global */
+ case 'l': /* local */
+ case 'f': /* field */
+ case 'm': /* method */
+ lua_pushfstring(L, " in function `%s'", ar.name);
+ break;
+ default: {
+ if (*ar.what == 'm') /* main? */
+ lua_pushfstring(L, " in main chunk");
+ else if (*ar.what == 'C' || *ar.what == 't')
+ lua_pushliteral(L, " ?"); /* C function or tail call */
+ else
+ lua_pushfstring(L, " in function <%s:%d>",
+ ar.short_src, ar.linedefined);
+ }
+ }
+ lua_concat(L, lua_gettop(L));
+ }
+ lua_concat(L, lua_gettop(L));
+ return 1;
+}
+
+
+static const luaL_reg dblib[] = {
+ {"getlocal", getlocal},
+ {"getinfo", getinfo},
+ {"gethook", gethook},
+ {"getupvalue", getupvalue},
+ {"sethook", sethook},
+ {"setlocal", setlocal},
+ {"setupvalue", setupvalue},
+ {"debug", debug},
+ {"traceback", errorfb},
+ {NULL, NULL}
+};
+
+
+LUALIB_API int luaopen_debug (lua_State *L) {
+ luaL_openlib(L, LUA_DBLIBNAME, dblib, 0);
+ lua_pushliteral(L, "_TRACEBACK");
+ lua_pushcfunction(L, errorfb);
+ lua_settable(L, LUA_GLOBALSINDEX);
+ return 1;
+}
+
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