From c1f029c6dcd606b3dbe8e3952ac55f89968ab6c4 Mon Sep 17 00:00:00 2001 From: Nipun Garg Date: Sat, 9 Mar 2019 02:41:35 +0530 Subject: COMMON: Move Lua into Common and make it into... an engine feature --- engines/sword25/util/lua/liolib.cpp | 592 ------------------------------------ 1 file changed, 592 deletions(-) delete mode 100644 engines/sword25/util/lua/liolib.cpp (limited to 'engines/sword25/util/lua/liolib.cpp') diff --git a/engines/sword25/util/lua/liolib.cpp b/engines/sword25/util/lua/liolib.cpp deleted file mode 100644 index 20d716498f..0000000000 --- a/engines/sword25/util/lua/liolib.cpp +++ /dev/null @@ -1,592 +0,0 @@ -/* -** $Id$ -** Standard I/O (and system) library -** See Copyright Notice in lua.h -*/ - - -#include -#include -#include - -#define liolib_c -#define LUA_LIB - -#include "lua.h" - -#include "lauxlib.h" -#include "lualib.h" -#include "common/textconsole.h" -#include "scummvm_file.h" - - -#define IO_INPUT 1 -#define IO_OUTPUT 2 - - -//static const char *const fnames[] = {"input", "output"}; - - -static int pushresult (lua_State *L, int i, const char *filename) { - int en = 0; /*errno;*/ // Currently hardcoded for ScumMVM, this may need to be changed - if (i) { - lua_pushboolean(L, 1); - return 1; - } - else { - lua_pushnil(L); - if (filename) - lua_pushfstring(L, "%s: %s", filename, "General error" /*strerror(en)*/); - else - lua_pushfstring(L, "%s", "General error" /*strerror(en)*/); - lua_pushinteger(L, en); - return 3; - } -} - -/* -static void fileerror (lua_State *L, int arg, const char *filename) { - lua_pushfstring(L, "%s: %s", filename, "LUA I/O error descriptions have been removed in ScummVM"); - luaL_argerror(L, arg, lua_tostring(L, -1)); -} -*/ - -#define tofilep(L) ((FILE **)luaL_checkudata(L, 1, LUA_FILEHANDLE)) -#define tofileProxy(L) ((Sword25::Sword25FileProxy **)luaL_checkudata(L, 1, LUA_FILEHANDLE)) - -static int io_type (lua_State *L) { - return luaL_error(L, "%s", "LUA I/O has been removed in ScummVM"); -/* - void *ud; - luaL_checkany(L, 1); - ud = lua_touserdata(L, 1); - lua_getfield(L, LUA_REGISTRYINDEX, LUA_FILEHANDLE); - if (ud == NULL || !lua_getmetatable(L, 1) || !lua_rawequal(L, -2, -1)) - lua_pushnil(L); // not a file - else if (*((FILE **)ud) == NULL) - lua_pushliteral(L, "closed file"); - else - lua_pushliteral(L, "file"); - return 1; -*/ -} - -static Sword25::Sword25FileProxy *tofile (lua_State *L) { - Sword25::Sword25FileProxy **f = tofileProxy(L); - if (*f == NULL) - luaL_error(L, "attempt to use a closed file"); - return *f; -} - - -/* -** When creating file handles, always creates a `closed' file handle -** before opening the actual file; so, if there is a memory error, the -** file is not left opened. -*/ -static Sword25::Sword25FileProxy **newfile (lua_State *L) { - Sword25::Sword25FileProxy **pf = (Sword25::Sword25FileProxy **)lua_newuserdata(L, sizeof(Sword25::Sword25FileProxy *)); - *pf = NULL; /* file handle is currently `closed' */ - luaL_getmetatable(L, LUA_FILEHANDLE); - lua_setmetatable(L, -2); - return pf; -} - - -/* -** function to (not) close the standard files stdin, stdout, and stderr -*/ -static int io_noclose (lua_State *L) { - lua_pushnil(L); - lua_pushliteral(L, "cannot close standard file"); - return 2; -} - - -/* -** function to close 'popen' files -*/ -static int io_pclose (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); -/* - FILE **p = tofilep(L); - int ok = lua_pclose(L, *p); - *p = NULL; - return pushresult(L, ok, NULL); - */ -} - - -/* -** function to close regular files -*/ -static int io_fclose (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); - /* - FILE **p = tofilep(L); - int ok = (fclose(*p) == 0); - *p = NULL; - return pushresult(L, ok, NULL); - */ -} - -/* -static int aux_close (lua_State *L) { - lua_getfenv(L, 1); - lua_getfield(L, -1, "__close"); - return (lua_tocfunction(L, -1))(L); -} -*/ - -static int io_close (lua_State *L) { - if (lua_isnone(L, 1)) - lua_rawgeti(L, LUA_ENVIRONINDEX, IO_OUTPUT); - - Sword25::Sword25FileProxy **f = tofileProxy(L); - delete *f; - *f = NULL; - - return 0; -} - - -static int io_gc (lua_State *L) { - Sword25::Sword25FileProxy **f = tofileProxy(L); - // ignore closed files - if (*f != NULL) - delete *f; - - return 0; -} - - -static int io_tostring (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); - /* - FILE *f = *tofilep(L); - if (f == NULL) - lua_pushliteral(L, "file (closed)"); - else - lua_pushfstring(L, "file (%p)", f); - return 1; - */ -} - - -static int io_open (lua_State *L) { - const char *filename = luaL_checkstring(L, 1); - const char *mode = luaL_optstring(L, 2, "r"); - Sword25::Sword25FileProxy **pf = newfile(L); - *pf = new Sword25::Sword25FileProxy(filename, mode); - return (*pf == NULL) ? pushresult(L, 0, filename) : 1; -} - - -/* -** this function has a separated environment, which defines the -** correct __close for 'popen' files -*/ -static int io_popen (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); -/* - const char *filename = luaL_checkstring(L, 1); - const char *mode = luaL_optstring(L, 2, "r"); - FILE **pf = newfile(L); - *pf = lua_popen(L, filename, mode); - return (*pf == NULL) ? pushresult(L, 0, filename) : 1; - */ -} - - -static int io_tmpfile (lua_State *L) { - return luaL_error(L, "%s", "LUA I/O error descriptions have been removed in ScummVM"); -} - -/* -static FILE *getiofile (lua_State *L, int findex) { - FILE *f; - lua_rawgeti(L, LUA_ENVIRONINDEX, findex); - f = *(FILE **)lua_touserdata(L, -1); - if (f == NULL) - luaL_error(L, "standard %s file is closed", fnames[findex - 1]); - return f; -} -*/ -/* -static int g_iofile (lua_State *L, int f, const char *mode) { - if (!lua_isnoneornil(L, 1)) { - const char *filename = lua_tostring(L, 1); - if (filename) { - FILE **pf = newfile(L); - *pf = fopen(filename, mode); - if (*pf == NULL) - fileerror(L, 1, filename); - } - else { - tofile(L); // check that it's a valid file handle - lua_pushvalue(L, 1); - } - lua_rawseti(L, LUA_ENVIRONINDEX, f); - } - // return current value - lua_rawgeti(L, LUA_ENVIRONINDEX, f); - return 1; -} -*/ - -static int io_input (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); -// return g_iofile(L, IO_INPUT, "r"); -} - - -static int io_output (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); -// return g_iofile(L, IO_OUTPUT, "w"); -} - - -static int io_readline (lua_State *L); - - -static void aux_lines (lua_State *L, int idx, int toclose) { - lua_pushvalue(L, idx); - lua_pushboolean(L, toclose); /* close/not close file when finished */ - lua_pushcclosure(L, io_readline, 2); -} - - -static int f_lines (lua_State *L) { - tofile(L); /* check that it's a valid file handle */ - aux_lines(L, 1, 0); - return 1; -} - - -static int io_lines (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); -/* - if (lua_isnoneornil(L, 1)) { // no arguments? - // will iterate over default input - lua_rawgeti(L, LUA_ENVIRONINDEX, IO_INPUT); - return f_lines(L); - } - else { - const char *filename = luaL_checkstring(L, 1); - FILE **pf = newfile(L); - *pf = fopen(filename, "r"); - if (*pf == NULL) - fileerror(L, 1, filename); - aux_lines(L, lua_gettop(L), 1); - return 1; - } - */ -} - - -/* -** {====================================================== -** READ -** ======================================================= -*/ - -/* -static int read_number (lua_State *L, Sword25::Sword25FileProxy *f) { - lua_Number d; - if (fscanf(f, LUA_NUMBER_SCAN, &d) == 1) { - lua_pushnumber(L, d); - return 1; - } - else return 0; // read fails -} - - -static int test_eof (lua_State *L, Sword25::Sword25FileProxy *f) { - int c = getc(f); - ungetc(c, f); - lua_pushlstring(L, NULL, 0); - return (c != EOF); -} - - -static int read_line (lua_State *L, Sword25::Sword25FileProxy *f) { - luaL_Buffer b; - luaL_buffinit(L, &b); - for (;;) { - size_t l; - char *p = luaL_prepbuffer(&b); - if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) { // eof? - luaL_pushresult(&b); // close buffer - return (lua_objlen(L, -1) > 0); // check whether read something - } - l = strlen(p); - if (l == 0 || p[l-1] != '\n') - luaL_addsize(&b, l); - else { - luaL_addsize(&b, l - 1); // do not include `eol' - luaL_pushresult(&b); // close buffer - return 1; // read at least an `eol' - } - } -} - - -static int read_chars (lua_State *L, Sword25::Sword25FileProxy *f, size_t n) { - size_t rlen; // how much to read - size_t nr; // number of chars actually read - luaL_Buffer b; - luaL_buffinit(L, &b); - rlen = LUAL_BUFFERSIZE; // try to read that much each time - do { - char *p = luaL_prepbuffer(&b); - if (rlen > n) rlen = n; // cannot read more than asked - nr = fread(p, sizeof(char), rlen, f); - luaL_addsize(&b, nr); - n -= nr; // still have to read `n' chars - } while (n > 0 && nr == rlen); // until end of count or eof - luaL_pushresult(&b); // close buffer - return (n == 0 || lua_objlen(L, -1) > 0); -} - - -static int g_read (lua_State *L, Sword25::Sword25FileProxy *f, int first) { - int nargs = lua_gettop(L) - 1; - int success; - int n; - clearerr(f); - if (nargs == 0) { // no arguments? - success = read_line(L, f); - n = first+1; // to return 1 result - } - else { // ensure stack space for all results and for auxlib's buffer - luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments"); - success = 1; - for (n = first; nargs-- && success; n++) { - if (lua_type(L, n) == LUA_TNUMBER) { - size_t l = (size_t)lua_tointeger(L, n); - success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l); - } - else { - const char *p = lua_tostring(L, n); - luaL_argcheck(L, p && p[0] == '*', n, "invalid option"); - switch (p[1]) { - case 'n': // number - success = read_number(L, f); - break; - case 'l': // line - success = read_line(L, f); - break; - case 'a': // file - read_chars(L, f, ~((size_t)0)); // read MAX_SIZE_T chars - success = 1; // always success - break; - default: - return luaL_argerror(L, n, "invalid format"); - } - } - } - } - if (ferror(f)) - return pushresult(L, 0, NULL); - if (!success) { - lua_pop(L, 1); // remove last result - lua_pushnil(L); // push nil instead - } - return n - first; -} -*/ - -static int io_read (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); -// return g_read(L, getiofile(L, IO_INPUT), 1); -} - - -static int f_read (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); -// return g_read(L, tofile(L), 2); -} - - -static int io_readline (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); -/* - FILE *f = *(FILE **)lua_touserdata(L, lua_upvalueindex(1)); - int sucess; - if (f == NULL) // file is already closed? - luaL_error(L, "file is already closed"); - sucess = read_line(L, f); - if (ferror(f)) - return luaL_error(L, "%s", "LUA I/O error descriptions have been removed in ScummVM"); - if (sucess) return 1; - else { // EOF - if (lua_toboolean(L, lua_upvalueindex(2))) { // generator created file? - lua_settop(L, 0); - lua_pushvalue(L, lua_upvalueindex(1)); - aux_close(L); // close it - } - return 0; - } -*/ -} - -/* }====================================================== */ - - -static int g_write (lua_State *L, Sword25::Sword25FileProxy *f, int arg) { - int nargs = lua_gettop(L) - 1; - int status = 1; - for (; nargs--; arg++) { - if (lua_type(L, arg) == LUA_TNUMBER) { - // optimization: could be done exactly as for strings - if (status) { - char buffer[22]; - sprintf(buffer, LUA_NUMBER_FMT, lua_tonumber(L, arg)); - status = f->write(buffer, strlen(buffer)) == strlen(buffer); - } - } - else { - size_t l; - const char *s = luaL_checklstring(L, arg, &l); - status = status && (f->write(s, l) == l); - } - } - return pushresult(L, status, NULL); -} - - -static int io_write (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); -// return g_write(L, getiofile(L, IO_OUTPUT), 1); -} - - -static int f_write (lua_State *L) { - return g_write(L, tofile(L), 2); -} - - -static int f_seek (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); - /* - static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END}; - static const char *const modenames[] = {"set", "cur", "end", NULL}; - FILE *f = tofile(L); - int op = luaL_checkoption(L, 2, "cur", modenames); - long offset = luaL_optlong(L, 3, 0); - op = fseek(f, offset, mode[op]); - if (op) - return pushresult(L, 0, NULL); // error - else { - lua_pushinteger(L, ftell(f)); - return 1; - } -*/ -} - - -static int f_setvbuf (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); - /* - static const int mode[] = {_IONBF, _IOFBF, _IOLBF}; - static const char *const modenames[] = {"no", "full", "line", NULL}; - FILE *f = tofile(L); - int op = luaL_checkoption(L, 2, NULL, modenames); - lua_Integer sz = luaL_optinteger(L, 3, LUAL_BUFFERSIZE); - int res = setvbuf(f, NULL, mode[op], sz); - return pushresult(L, res == 0, NULL); - */ -} - - - -static int io_flush (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); -// return pushresult(L, fflush(getiofile(L, IO_OUTPUT)) == 0, NULL); -} - - -static int f_flush (lua_State *L) { - error("LUA I/O has been removed in ScummVM"); -// return pushresult(L, fflush(tofile(L)) == 0, NULL); -} - - -static const luaL_Reg iolib[] = { - {"close", io_close}, - {"flush", io_flush}, - {"input", io_input}, - {"lines", io_lines}, - {"open", io_open}, - {"output", io_output}, - {"popen", io_popen}, - {"read", io_read}, - {"tmpfile", io_tmpfile}, - {"type", io_type}, - {"write", io_write}, - {NULL, NULL} -}; - - -static const luaL_Reg flib[] = { - {"close", io_close}, - {"flush", f_flush}, - {"lines", f_lines}, - {"read", f_read}, - {"seek", f_seek}, - {"setvbuf", f_setvbuf}, - {"write", f_write}, - {"__gc", io_gc}, - {"__tostring", io_tostring}, - {NULL, NULL} -}; - - -static void createmeta (lua_State *L) { - luaL_newmetatable(L, LUA_FILEHANDLE); /* create metatable for file handles */ - lua_pushvalue(L, -1); /* push metatable */ - lua_setfield(L, -2, "__index"); /* metatable.__index = metatable */ - luaL_register(L, NULL, flib); /* file methods */ -} - -/* -static void createstdfile (lua_State *L, FILE *f, int k, const char *fname) { - *newfile(L) = f; - if (k > 0) { - lua_pushvalue(L, -1); - lua_rawseti(L, LUA_ENVIRONINDEX, k); - } - lua_pushvalue(L, -2); // copy environment - lua_setfenv(L, -2); // set it - lua_setfield(L, -3, fname); -} -*/ - -static void newfenv (lua_State *L, lua_CFunction cls) { - lua_createtable(L, 0, 1); - lua_pushcfunction(L, cls); - lua_setfield(L, -2, "__close"); -} - - -LUALIB_API int luaopen_io (lua_State *L) { - createmeta(L); - /* create (private) environment (with fields IO_INPUT, IO_OUTPUT, __close) */ - newfenv(L, io_fclose); - lua_replace(L, LUA_ENVIRONINDEX); - /* open library */ - luaL_register(L, LUA_IOLIBNAME, iolib); - /* create (and set) default files */ - newfenv(L, io_noclose); /* close function for default files */ -/* - createstdfile(L, stdin, IO_INPUT, "stdin"); - createstdfile(L, stdout, IO_OUTPUT, "stdout"); - createstdfile(L, stderr, 0, "stderr"); -*/ - lua_pop(L, 1); /* pop environment for default files */ - lua_getfield(L, -1, "popen"); - newfenv(L, io_pclose); /* create environment for 'popen' */ - lua_setfenv(L, -2); /* set fenv for 'popen' */ - lua_pop(L, 1); /* pop 'popen' */ - return 1; -} -- cgit v1.2.3