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-rw-r--r--Build/source/texk/web2c/luatexdir/lua/luastuff.w493
1 files changed, 493 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/luatexdir/lua/luastuff.w b/Build/source/texk/web2c/luatexdir/lua/luastuff.w
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index 00000000000..06547bc4de9
--- /dev/null
+++ b/Build/source/texk/web2c/luatexdir/lua/luastuff.w
@@ -0,0 +1,493 @@
+% luastuff.w
+
+% Copyright 2006-2010 Taco Hoekwater <taco@@luatex.org>
+
+% This file is part of LuaTeX.
+
+% LuaTeX is free software; you can redistribute it and/or modify it under
+% the terms of the GNU General Public License as published by the Free
+% Software Foundation; either version 2 of the License, or (at your
+% option) any later version.
+
+% LuaTeX is distributed in the hope that it will be useful, but WITHOUT
+% ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+% FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+% License for more details.
+
+% You should have received a copy of the GNU General Public License along
+% with LuaTeX; if not, see <http://www.gnu.org/licenses/>.
+
+@ @c
+static const char _svn_version[] =
+ "$Id: luastuff.w 3583 2010-04-02 17:40:44Z hhenkel $ "
+ "$URL: http://foundry.supelec.fr/svn/luatex/tags/beta-0.60.0/source/texk/web2c/luatexdir/lua/luastuff.w $";
+
+#include "lua/luatex-api.h"
+#include "ptexlib.h"
+
+@ @c
+lua_State *Luas = NULL;
+
+int luastate_bytes = 0;
+
+int lua_active = 0;
+
+@ @c
+void make_table(lua_State * L, const char *tab, const char *getfunc,
+ const char *setfunc)
+{
+ /* make the table *//* |[{<tex>}]| */
+ lua_pushstring(L, tab); /* |[{<tex>},"dimen"]| */
+ lua_newtable(L); /* |[{<tex>},"dimen",{}]| */
+ lua_settable(L, -3); /* |[{<tex>}]| */
+ /* fetch it back */
+ lua_pushstring(L, tab); /* |[{<tex>},"dimen"]| */
+ lua_gettable(L, -2); /* |[{<tex>},{<dimen>}]| */
+ /* make the meta entries */
+ luaL_newmetatable(L, tab); /* |[{<tex>},{<dimen>},{<dimen_m>}]| */
+ lua_pushstring(L, "__index"); /* |[{<tex>},{<dimen>},{<dimen_m>},"__index"]| */
+ lua_pushstring(L, getfunc); /* |[{<tex>},{<dimen>},{<dimen_m>},"__index","getdimen"]| */
+ lua_gettable(L, -5); /* |[{<tex>},{<dimen>},{<dimen_m>},"__index",<tex.getdimen>]| */
+ lua_settable(L, -3); /* |[{<tex>},{<dimen>},{<dimen_m>}]| */
+ lua_pushstring(L, "__newindex"); /* |[{<tex>},{<dimen>},{<dimen_m>},"__newindex"]| */
+ lua_pushstring(L, setfunc); /* |[{<tex>},{<dimen>},{<dimen_m>},"__newindex","setdimen"]| */
+ lua_gettable(L, -5); /* |[{<tex>},{<dimen>},{<dimen_m>},"__newindex",<tex.setdimen>]| */
+ lua_settable(L, -3); /* |[{<tex>},{<dimen>},{<dimen_m>}]| */
+ lua_setmetatable(L, -2); /* |[{<tex>},{<dimen>}]| : assign the metatable */
+ lua_pop(L, 1); /* |[{<tex>}]| : clean the stack */
+}
+
+@ @c
+static
+const char *getS(lua_State * L, void *ud, size_t * size)
+{
+ LoadS *ls = (LoadS *) ud;
+ (void) L;
+ if (ls->size == 0)
+ return NULL;
+ *size = ls->size;
+ ls->size = 0;
+ return ls->s;
+}
+
+@ @c
+void *my_luaalloc(void *ud, void *ptr, size_t osize, size_t nsize)
+{
+ void *ret = NULL;
+ (void) ud; /* for -Wunused */
+ if (nsize == 0)
+ free(ptr);
+ else
+ ret = realloc(ptr, nsize);
+ luastate_bytes += (int) (nsize - osize);
+ return ret;
+}
+
+@ @c
+static int my_luapanic(lua_State * L)
+{
+ (void) L; /* to avoid warnings */
+ fprintf(stderr, "PANIC: unprotected error in call to Lua API (%s)\n",
+ lua_tostring(L, -1));
+ return 0;
+}
+
+@ @c
+static const luaL_Reg lualibs[] = {
+ {"", luaopen_base},
+ {"package", luaopen_package},
+ {"table", luaopen_table},
+ {"io", luaopen_io},
+ {"os", luaopen_os},
+ {"string", luaopen_string},
+ {"math", luaopen_math},
+ {"debug", luaopen_debug},
+ {"unicode", luaopen_unicode},
+ {"zip", luaopen_zip},
+ {"lpeg", luaopen_lpeg},
+ {"md5", luaopen_md5},
+ {"lfs", luaopen_lfs},
+ {"profiler", luaopen_profiler},
+ {NULL, NULL}
+};
+
+
+@ @c
+static void do_openlibs(lua_State * L)
+{
+ const luaL_Reg *lib = lualibs;
+ for (; lib->func; lib++) {
+ lua_pushcfunction(L, lib->func);
+ lua_pushstring(L, lib->name);
+ lua_call(L, 1, 0);
+ }
+}
+
+@ @c
+static int load_aux (lua_State *L, int status) {
+ if (status == 0) /* OK? */
+ return 1;
+ else {
+ lua_pushnil(L);
+ lua_insert(L, -2); /* put before error message */
+ return 2; /* return nil plus error message */
+ }
+}
+
+@ @c
+static int luatex_loadfile (lua_State *L) {
+ const char *fname = luaL_optstring(L, 1, NULL);
+ if (!lua_only && !fname) {
+ if (interaction == batch_mode) {
+ lua_pushnil(L);
+ lua_pushstring(L, "reading from stdin is disabled in batch mode");
+ return 2; /* return nil plus error message */
+ } else {
+ tprint_nl("lua> ");
+ }
+ }
+ return load_aux(L, luaL_loadfile(L, fname));
+}
+
+@ @c
+static int luatex_dofile (lua_State *L) {
+ const char *fname = luaL_optstring(L, 1, NULL);
+ int n = lua_gettop(L);
+ if (!lua_only && !fname) {
+ if (interaction == batch_mode) {
+ lua_pushnil(L);
+ lua_pushstring(L, "reading from stdin is disabled in batch mode");
+ return 2; /* return nil plus error message */
+ } else {
+ tprint_nl("lua> ");
+ }
+ }
+ if (luaL_loadfile(L, fname) != 0) lua_error(L);
+ lua_call(L, 0, LUA_MULTRET);
+ return lua_gettop(L) - n;
+}
+
+
+@ @c
+void luainterpreter(void)
+{
+ lua_State *L;
+ L = lua_newstate(my_luaalloc, NULL);
+ if (L == NULL) {
+ fprintf(stderr, "Can't create the Lua state.\n");
+ return;
+ }
+ lua_atpanic(L, &my_luapanic);
+
+ do_openlibs(L); /* does all the 'simple' libraries */
+
+ lua_pushcfunction(L,luatex_dofile);
+ lua_setglobal(L, "dofile");
+ lua_pushcfunction(L,luatex_loadfile);
+ lua_setglobal(L, "loadfile");
+
+ luatex_md5_lua_open(L);
+
+ open_oslibext(L, safer_option);
+
+ /* luasockets */
+ /* socket and mime are a bit tricky to open because
+ they use a load-time dependency that has to be
+ worked around for luatex, where the C module is
+ loaded way before the lua module.
+ */
+ if (!nosocket_option) {
+ lua_getglobal(L, "package");
+ lua_getfield(L, -1, "loaded");
+ if (!lua_istable(L, -1)) {
+ lua_newtable(L);
+ lua_setfield(L, -2, "loaded");
+ lua_getfield(L, -1, "loaded");
+ }
+ luaopen_socket_core(L);
+ lua_setfield(L, -2, "socket.core");
+ lua_pushnil(L);
+ lua_setfield(L, -2, "socket"); /* package.loaded.socket = nil */
+
+ luaopen_mime_core(L);
+ lua_setfield(L, -2, "mime.core");
+ lua_pushnil(L);
+ lua_setfield(L, -2, "mime"); /* package.loaded.mime = nil */
+ lua_pop(L, 2); /* pop the tables */
+
+ luatex_socketlua_open(L); /* preload the pure lua modules */
+ }
+ /* zlib. slightly odd calling convention */
+ luaopen_zlib(L);
+ lua_setglobal(L, "zlib");
+ luaopen_gzip(L);
+
+ /* our own libraries */
+ luaopen_ff(L);
+ luaopen_tex(L);
+ luaopen_token(L);
+ luaopen_node(L);
+ luaopen_texio(L);
+ luaopen_kpse(L);
+ luaopen_callback(L);
+ luaopen_lua(L, startup_filename);
+ luaopen_stats(L);
+ luaopen_font(L);
+ luaopen_lang(L);
+ luaopen_mplib(L);
+
+ /* |luaopen_pdf(L);| */
+ /* environment table at |LUA_ENVIRONINDEX| needs to load this way: */
+ lua_pushcfunction(L, luaopen_pdf);
+ lua_pushstring(L, "pdf");
+ lua_call(L, 1, 0);
+
+ /* |luaopen_img(L);| */
+ lua_pushcfunction(L, luaopen_img);
+ lua_pushstring(L, "img");
+ lua_call(L, 1, 0);
+
+ /* |luaopen_epdf(L);| */
+ lua_pushcfunction(L, luaopen_epdf);
+ lua_pushstring(L, "epdf");
+ lua_call(L, 1, 0);
+
+ lua_createtable(L, 0, 0);
+ lua_setglobal(L, "texconfig");
+
+ if (safer_option) {
+ /* disable some stuff if --safer */
+ (void) hide_lua_value(L, "os", "execute");
+ (void) hide_lua_value(L, "os", "rename");
+ (void) hide_lua_value(L, "os", "remove");
+ (void) hide_lua_value(L, "io", "popen");
+ /* make io.open only read files */
+ luaL_checkstack(L, 2, "out of stack space");
+ lua_getglobal(L, "io");
+ lua_getfield(L, -1, "open_ro");
+ lua_setfield(L, -2, "open");
+ (void) hide_lua_value(L, "io", "tmpfile");
+ (void) hide_lua_value(L, "io", "output");
+ (void) hide_lua_value(L, "lfs", "chdir");
+ (void) hide_lua_value(L, "lfs", "lock");
+ (void) hide_lua_value(L, "lfs", "touch");
+ (void) hide_lua_value(L, "lfs", "rmdir");
+ (void) hide_lua_value(L, "lfs", "mkdir");
+ }
+ Luas = L;
+}
+
+@ @c
+int hide_lua_table(lua_State * L, const char *name)
+{
+ int r = 0;
+ lua_getglobal(L, name);
+ if (lua_istable(L, -1)) {
+ r = luaL_ref(L, LUA_REGISTRYINDEX);
+ lua_pushnil(L);
+ lua_setglobal(L, name);
+ }
+ return r;
+}
+
+@ @c
+void unhide_lua_table(lua_State * L, const char *name, int r)
+{
+ lua_rawgeti(L, LUA_REGISTRYINDEX, r);
+ lua_setglobal(L, name);
+ luaL_unref(L, LUA_REGISTRYINDEX, r);
+}
+
+@ @c
+int hide_lua_value(lua_State * L, const char *name, const char *item)
+{
+ int r = 0;
+ lua_getglobal(L, name);
+ if (lua_istable(L, -1)) {
+ lua_getfield(L, -1, item);
+ r = luaL_ref(L, LUA_REGISTRYINDEX);
+ lua_pushnil(L);
+ lua_setfield(L, -2, item);
+ }
+ return r;
+}
+
+@ @c
+void unhide_lua_value(lua_State * L, const char *name, const char *item, int r)
+{
+ lua_getglobal(L, name);
+ if (lua_istable(L, -1)) {
+ lua_rawgeti(L, LUA_REGISTRYINDEX, r);
+ lua_setfield(L, -2, item);
+ luaL_unref(L, LUA_REGISTRYINDEX, r);
+ }
+}
+
+
+@ @c
+int lua_traceback(lua_State * L)
+{
+ lua_getfield(L, LUA_GLOBALSINDEX, "debug");
+ if (!lua_istable(L, -1)) {
+ lua_pop(L, 1);
+ return 1;
+ }
+ lua_getfield(L, -1, "traceback");
+ if (!lua_isfunction(L, -1)) {
+ lua_pop(L, 2);
+ return 1;
+ }
+ lua_pushvalue(L, 1); /* pass error message */
+ lua_pushinteger(L, 2); /* skip this function and traceback */
+ lua_call(L, 2, 1); /* call debug.traceback */
+ return 1;
+}
+
+@ @c
+static void luacall(int p, int nameptr)
+{
+ LoadS ls;
+ int i, l;
+ char *lua_id;
+ char *s = NULL;
+
+ if (Luas == NULL) {
+ luainterpreter();
+ }
+ l = 0;
+ lua_active++;
+ s = tokenlist_to_cstring(p, 1, &l);
+ ls.s = s;
+ ls.size = (size_t) l;
+
+ if (ls.size > 0) {
+ if (nameptr > 0) {
+ lua_id = tokenlist_to_cstring(nameptr, 1, &l);
+ } else if (nameptr < 0) {
+ char *tmp = get_lua_name((nameptr + 65536));
+ if (tmp != NULL)
+ lua_id = xstrdup(tmp);
+ else
+ lua_id = xstrdup("\\latelua ");
+ } else {
+ lua_id = xmalloc(20);
+ snprintf((char *) lua_id, 20, "\\latelua ");
+ }
+
+ i = lua_load(Luas, getS, &ls, lua_id);
+ if (i != 0) {
+ Luas = luatex_error(Luas, (i == LUA_ERRSYNTAX ? 0 : 1));
+ } else {
+ int base = lua_gettop(Luas); /* function index */
+ lua_checkstack(Luas, 1);
+ lua_pushcfunction(Luas, lua_traceback); /* push traceback function */
+ lua_insert(Luas, base); /* put it under chunk */
+ i = lua_pcall(Luas, 0, 0, base);
+ lua_remove(Luas, base); /* remove traceback function */
+ if (i != 0) {
+ lua_gc(Luas, LUA_GCCOLLECT, 0);
+ Luas = luatex_error(Luas, (i == LUA_ERRRUN ? 0 : 1));
+ }
+ }
+ xfree(lua_id);
+ }
+ lua_active--;
+}
+
+@ @c
+void late_lua(PDF pdf, halfword p)
+{
+ (void) pdf;
+ expand_macros_in_tokenlist(p); /* sets |def_ref| */
+ luacall(def_ref, late_lua_name(p));
+ flush_list(def_ref);
+}
+
+@ @c
+void luatokencall(int p, int nameptr)
+{
+ LoadS ls;
+ int i, l;
+ char *s = NULL;
+ char *lua_id;
+ assert(Luas);
+ l = 0;
+ lua_active++;
+ s = tokenlist_to_cstring(p, 1, &l);
+ ls.s = s;
+ ls.size = (size_t) l;
+ if (ls.size > 0) {
+ if (nameptr > 0) {
+ lua_id = tokenlist_to_cstring(nameptr, 1, &l);
+ } else if (nameptr < 0) {
+ char *tmp = get_lua_name((nameptr + 65536));
+ if (tmp != NULL)
+ lua_id = xstrdup(tmp);
+ else
+ lua_id = xstrdup("\\directlua ");
+ } else {
+ lua_id = xstrdup("\\directlua ");
+ }
+ i = lua_load(Luas, getS, &ls, lua_id);
+ xfree(s);
+ if (i != 0) {
+ Luas = luatex_error(Luas, (i == LUA_ERRSYNTAX ? 0 : 1));
+ } else {
+ int base = lua_gettop(Luas); /* function index */
+ lua_checkstack(Luas, 1);
+ lua_pushcfunction(Luas, lua_traceback); /* push traceback function */
+ lua_insert(Luas, base); /* put it under chunk */
+ i = lua_pcall(Luas, 0, 0, base);
+ lua_remove(Luas, base); /* remove traceback function */
+ if (i != 0) {
+ lua_gc(Luas, LUA_GCCOLLECT, 0);
+ Luas = luatex_error(Luas, (i == LUA_ERRRUN ? 0 : 1));
+ }
+ }
+ xfree(lua_id);
+ }
+ lua_active--;
+}
+
+@ @c
+lua_State *luatex_error(lua_State * L, int is_fatal)
+{
+
+ const char *luaerr;
+ size_t len = 0;
+ char *err = NULL;
+ if (lua_isstring(L, -1)) {
+ luaerr = lua_tolstring(L, -1, &len);
+ err = (char *) xmalloc((unsigned) (len + 1));
+ len = (size_t) snprintf(err, (len + 1), "%s", luaerr);
+ }
+ if (is_fatal > 0) {
+ /* Normally a memory error from lua.
+ The pool may overflow during the |maketexlstring()|, but we
+ are crashing anyway so we may as well abort on the pool size */
+ lua_fatal_error(err);
+ /* never reached */
+ xfree(err);
+ lua_close(L);
+ return (lua_State *) NULL;
+ } else {
+ lua_norm_error(err);
+ xfree(err);
+ return L;
+ }
+}
+
+@ @c
+void preset_environment(lua_State * L, const parm_struct * p)
+{
+ int i;
+ assert(L != NULL);
+ lua_newtable(L); /* t */
+ for (i = 1, ++p; p->name != NULL; i++, p++) {
+ assert(i == p->idx);
+ lua_pushstring(L, p->name); /* k t */
+ lua_pushinteger(L, p->idx); /* v k t */
+ lua_settable(L, -3); /* t */
+ }
+ lua_replace(L, LUA_ENVIRONINDEX); /* - */
+}