/* ** $Id: lua.c,v 1.160.1.2 2007/12/28 15:32:23 roberto Exp $ ** Lua stand-alone interpreter ** See Copyright Notice in lua.h */ #include #include #include #include #include #include #include #include #include #include #include #define lua_c #include "lua.h" //? #include "lstate.h" #include "teliva.h" #include "lauxlib.h" #include "lualib.h" static lua_State *globalL = NULL; static const char *progname = LUA_PROGNAME; static void lstop (lua_State *L, lua_Debug *ar) { (void)ar; /* unused arg. */ lua_sethook(L, NULL, 0, 0); luaL_error(L, "interrupted!"); } static void laction (int i) { signal(i, SIG_DFL); /* if another SIGINT happens before lstop, terminate process (default action) */ lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1); } static void print_usage (void) { printf("usage: %s ___.tlv [args]\n", progname); } static void l_message (const char *pname, const char *msg) { if (!stdscr || isendwin()) { printf("%s: %s\n", pname, msg); exit(1); } if (pname) mvprintw(LINES-2, 0, "%s: ", pname); printw(msg); mvprintw(LINES-1, 0, "sorry, you'll need to edit the image directly. press any key to exit."); refresh(); nodelay(stdscr, 0); /* make getch() block */ getch(); } static int report (lua_State *L, int status) { if (status && !lua_isnil(L, -1)) { const char *msg = lua_tostring(L, -1); if (msg == NULL) msg = "(error object is not a string)"; l_message(progname, msg); lua_pop(L, 1); } return status; } /* return final y containing text */ static int render_wrapped_text (int y, int xmin, int xmax, const char *text) { int x = xmin; move(y, x); for (int j = 0; j < strlen(text); ++j) { char c = text[j]; if (c != '\n') { addch(text[j]); ++x; if (x >= xmax) { ++y; x = xmin; move(y, x); } } else { /* newline */ ++y; x = xmin; move(y, x); } } return y; } const char *Previous_error = NULL; void render_previous_error (void) { if (!Previous_error) return; init_pair(COLOR_PAIR_ERROR, COLOR_ERROR_FOREGROUND, COLOR_ERROR_BACKGROUND); attron(COLOR_PAIR(COLOR_PAIR_ERROR)); render_wrapped_text(LINES-10, COLS/2, COLS, Previous_error); attroff(COLOR_PAIR(COLOR_PAIR_ERROR)); } extern char *strdup(const char *s); extern void developer_mode (lua_State *L); static int report_in_developer_mode (lua_State *L, int status) { if (status && !lua_isnil(L, -1)) { Previous_error = strdup(lua_tostring(L, -1)); /* memory leak */ if (Previous_error == NULL) Previous_error = "(error object is not a string)"; lua_pop(L, 1); for (int x = 0; x < COLS; ++x) { mvaddch(LINES-2, x, ' '); mvaddch(LINES-1, x, ' '); } render_previous_error(); mvaddstr(LINES-1, 0, "press any key to continue"); getch(); developer_mode(L); } return status; } static int traceback (lua_State *L) { if (!lua_isstring(L, 1)) /* 'message' not a string? */ return 1; /* keep it intact */ 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; } static int docall (lua_State *L, int narg, int clear) { int status; int base = lua_gettop(L) - narg; /* function index */ lua_pushcfunction(L, traceback); /* push traceback function */ lua_insert(L, base); /* put it under chunk and args */ signal(SIGINT, laction); status = lua_pcall(L, narg, (clear ? 0 : LUA_MULTRET), base); signal(SIGINT, SIG_DFL); lua_remove(L, base); /* remove traceback function */ /* force a complete garbage collection in case of errors */ if (status != 0) lua_gc(L, LUA_GCCOLLECT, 0); return status; } /* initialize global binding "args" for commandline args */ static void set_args (lua_State *L, char **argv, int n) { int narg; int i; int argc = 0; while (argv[argc]) argc++; /* count total number of arguments */ narg = argc - (n + 1); /* number of arguments to the script */ luaL_checkstack(L, narg + 3, "too many arguments to script"); lua_newtable(L); for (i=0; i < argc; i++) { lua_pushstring(L, argv[i]); lua_rawseti(L, -2, i - n); } lua_setglobal(L, "arg"); } static int dofile (lua_State *L, const char *name) { int status = luaL_loadfile(L, name) || docall(L, 0, 1); return report_in_developer_mode(L, status); } static int dostring (lua_State *L, const char *s, const char *name) { int status = luaL_loadbuffer(L, s, strlen(s), name) || docall(L, 0, 1); return report_in_developer_mode(L, status); } void stack_dump (lua_State *L) { int i; int top = lua_gettop(L); int y = 1; for (i = 1; i <= top; i++) { /* repeat for each level */ int t = lua_type(L, i); switch (t) { case LUA_TSTRING: /* strings */ mvprintw(y, 30, "`%s'", lua_tostring(L, i)); break; case LUA_TBOOLEAN: /* booleans */ mvprintw(y, 30, lua_toboolean(L, i) ? "true" : "false"); break; case LUA_TNUMBER: /* numbers */ mvprintw(y, 30, "%g", lua_tonumber(L, i)); break; default: /* other values */ mvprintw(y, 30, "%s", lua_typename(L, t)); break; } y++; mvprintw(y, 30, " "); /* put a separator */ y++; } mvprintw(y, 30, "\n"); /* end the listing */ y++; } static int binding_exists (lua_State *L, const char *name) { int result = 0; lua_getglobal(L, name); result = !lua_isnil(L, -1); lua_pop(L, 1); return result; } static const char *special_history_keys[] = { "__teliva_timestamp", "__teliva_undo", "__teliva_note", NULL, }; int is_special_history_key(const char *key) { for (const char **curr = special_history_keys; *curr != NULL; ++curr) { if (strcmp(*curr, key) == 0) return 1; } return 0; } /* when found, return 1 and leave string on top of stack * when not found, return 0 * caller is responsible for cleaning up the stack. */ static int look_up_definition (lua_State *L, const char *name) { lua_getglobal(L, "teliva_program"); int history_array = lua_gettop(L); /* iterate over mutations in teliva_program history in reverse order */ int history_array_size = luaL_getn(L, history_array); for (int i = history_array_size; i > 0; --i) { lua_rawgeti(L, history_array, i); int table = lua_gettop(L); /* iterate over bindings */ /* really we expect only one */ for (lua_pushnil(L); lua_next(L, table) != 0; lua_pop(L, 1)) { const char* key = lua_tostring(L, -2); if (strcmp(key, "__teliva_undo") == 0) { int next_i = lua_tointeger(L, -1); assert(next_i < i); i = next_i + 1; /* account for decrement */ lua_pop(L, 1); break; } if (is_special_history_key(key)) continue; if (strcmp(key, name) == 0) return 1; } lua_pop(L, 1); } lua_pop(L, 1); return 0; } int load_definitions(lua_State *L) { int status; lua_getglobal(L, "teliva_program"); int history_array = lua_gettop(L); /* iterate over mutations in teliva_program history in reverse order */ int history_array_size = luaL_getn(L, history_array); for (int i = history_array_size; i > 0; --i) { lua_rawgeti(L, history_array, i); int table = lua_gettop(L); /* iterate over bindings */ /* really we expect only one */ for (lua_pushnil(L); lua_next(L, table) != 0; lua_pop(L, 1)) { const char* key = lua_tostring(L, -2); if (strcmp(key, "__teliva_undo") == 0) { int next_i = lua_tointeger(L, -1); assert(next_i < i); i = next_i + 1; /* account for decrement */ lua_pop(L, 1); break; } if (is_special_history_key(key)) continue; if (binding_exists(L, key)) continue; // most recent binding trumps older ones const char* value = lua_tostring(L, -1); status = dostring(L, value, key); if (status != 0) return report_in_developer_mode(L, status); } lua_pop(L, 1); } lua_pop(L, 1); return 0; } int run_tests(lua_State *L) { clear(); lua_pushinteger(L, 0); lua_setglobal(L, "teliva_num_test_failures"); lua_pushnil(L); lua_setglobal(L, "teliva_first_failure"); lua_pushvalue(L, LUA_GLOBALSINDEX); int table = lua_gettop(L); for (lua_pushnil(L); lua_next(L, table) != 0; lua_pop(L, 1)) { const char* key = lua_tostring(L, -2); if (strncmp("test_", key, strlen("test_")) != 0) continue; if (!lua_isfunction(L, -1)) continue; int status = lua_pcall(L, 0, 0, 0); if (status) { printf("E%d: %s\n", status, lua_tostring(L, -1)); lua_getglobal(L, "teliva_first_failure"); int first_failure_clear = lua_isnil(L, -1); lua_pop(L, 1); if (first_failure_clear) lua_setglobal(L, "teliva_first_failure"); } lua_pushnil(L); /* just to undo loop update */ } lua_pop(L, 1); lua_getglobal(L, "teliva_num_test_failures"); int num_failures = lua_tointeger(L, -1); lua_pop(L, 1); if (num_failures == 0) return 0; if (num_failures == 1) printf("1 failure"); else printf("%d failures", num_failures); fflush(stdout); getch(); /* take first failure back to developer mode */ lua_getglobal(L, "teliva_first_failure"); assert(!lua_isnil(L, -1)); return 1; } void clear_call_graph(lua_State *L) { int oldtop = lua_gettop(L); luaL_newmetatable(L, "__teliva_call_graph_depth"); int cgt = lua_gettop(L); lua_pushnil(L); while (lua_next(L, cgt) != 0) { lua_pop(L, 1); /* old value */ lua_pushvalue(L, -1); /* duplicate key */ lua_pushnil(L); /* new value */ lua_settable(L, cgt); /* one copy of key left for lua_next */ } lua_pop(L, 1); assert(lua_gettop(L) == oldtop); } char *Image_name = NULL; extern void load_tlv (lua_State *L, char *filename); static int handle_image (lua_State *L, char **argv, int n) { int status; set_args(L, argv, n); /* parse and load file contents (teliva_program array) */ Image_name = argv[n]; load_tlv(L, Image_name); //? save_tlv(L, Image_name); // manual test; should always return identical result, modulo key order //? exit(1); status = load_definitions(L); if (status != 0) return 0; status = run_tests(L); if (status != 0) return report_in_developer_mode(L, status); /* clear callgraph stats from running tests */ clear_call_graph(L); /* call main() */ lua_getglobal(L, "main"); status = docall(L, 0, 1); if (status != 0) return report_in_developer_mode(L, status); return 0; } #define CURRENT_DEFINITION_LEN 256 char Current_definition[CURRENT_DEFINITION_LEN+1] = {0}; extern int mkstemp(char *template); extern FILE *fdopen(int fd, const char *mode); void save_editor_state (int rowoff, int coloff, int cy, int cx) { if (strlen(Current_definition) == 0) return; char outfilename[] = "teliva_editor_state_XXXXXX"; int outfd = mkstemp(outfilename); if (outfd == -1) { endwin(); perror("error in creating temporary file"); abort(); } FILE *out = fdopen(outfd, "w"); assert(out != NULL); fprintf(out, "__teliva_editor_state = {\n"); fprintf(out, " image = \"%s\", definition = \"%s\",\n", Image_name, Current_definition); fprintf(out, " rowoff = %d, coloff = %d,\n", rowoff, coloff); fprintf(out, " cy = %d, cx = %d,\n", cy, cx); fprintf(out, "}\n"); fclose(out); rename(outfilename, "teliva_editor_state"); } void save_to_current_definition_and_editor_buffer (lua_State *L, const char *definition) { int oldtop = lua_gettop(L); strncpy(Current_definition, definition, CURRENT_DEFINITION_LEN); int status = look_up_definition(L, Current_definition); char outfilename[] = "teliva_editor_buffer_XXXXXX"; int outfd = mkstemp(outfilename); if (outfd == -1) { endwin(); perror("save_to_current_definition_and_editor_buffer: error in creating temporary file"); abort(); } FILE *out = fdopen(outfd, "w"); assert(out != NULL); if (status) fprintf(out, "%s", lua_tostring(L, -1)); fclose(out); rename(outfilename, "teliva_editor_buffer"); lua_settop(L, oldtop); } /* I don't understand the best way to read all of a text file. * I'm currently using fread, but its error handling is really designed for * binary data containing fixed-size records. */ static void read_editor_buffer (char *out, int capacity) { FILE *in = fopen("teliva_editor_buffer", "r"); fread(out, capacity, 1, in); /* TODO: handle overly large file */ fclose(in); } static void update_definition (lua_State *L, const char *name, char *new_contents) { int oldtop = lua_gettop(L); lua_getglobal(L, "teliva_program"); int history_array = lua_gettop(L); /* create a new table containing a single binding */ lua_createtable(L, /*number of fields per mutation*/2, 0); lua_pushstring(L, new_contents); assert(strlen(name) > 0); lua_setfield(L, -2, name); /* include timestamp at which binding was created */ time_t t; time(&t); char *time_string = ctime(&t); lua_pushstring(L, time_string); lua_setfield(L, -2, "__teliva_timestamp"); /* append the new table to the history of mutations */ int history_array_size = luaL_getn(L, history_array); ++history_array_size; lua_rawseti(L, history_array, history_array_size); lua_settop(L, oldtop); } extern void save_tlv (lua_State *L, char *filename); int load_editor_buffer_to_current_definition_in_image(lua_State *L) { char new_contents[8192] = {0}; read_editor_buffer(new_contents, 8190); update_definition(L, Current_definition, new_contents); save_tlv(L, Image_name); /* reload binding */ return luaL_loadbuffer(L, new_contents, strlen(new_contents), Current_definition) || docall(L, 0, 1); } /* return true if user chose to back into the big picture view */ /* But only if there are no errors. Otherwise things can get confusing. */ extern int edit (lua_State *L, char *filename); extern int resumeEdit (lua_State *L); int edit_current_definition (lua_State *L) { int back_to_big_picture = edit(L, "teliva_editor_buffer"); // error handling int oldtop = lua_gettop(L); while (1) { int status; status = load_editor_buffer_to_current_definition_in_image(L); if (status == 0 || lua_isnil(L, -1)) break; Previous_error = lua_tostring(L, -1); if (Previous_error == NULL) Previous_error = "(error object is not a string)"; back_to_big_picture = resumeEdit(L); lua_pop(L, 1); } if (lua_gettop(L) != oldtop) { endwin(); printf("edit_current_definition: memory leak %d -> %d\n", oldtop, lua_gettop(L)); exit(1); } return back_to_big_picture; } extern void draw_menu_item (const char* key, const char* name); extern void draw_string_on_menu (const char* s); static void recent_changes_menu (int cursor, int history_array_size) { attrset(A_REVERSE); for (int x = 0; x < COLS; ++x) mvaddch(LINES-1, x, ' '); attrset(A_NORMAL); extern int menu_column; menu_column = 2; draw_menu_item("^x", "go back"); /* draw_menu_item("↓|space", "older"); */ attroff(A_REVERSE); mvaddstr(LINES-1, menu_column, " ↓"); attron(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); addstr("|"); attroff(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); addstr("space "); menu_column += 9; /* strlen isn't sufficient */ attron(A_REVERSE); draw_string_on_menu("older"); /* draw_menu_item("↑|backspace|delete|^h", "newer"); */ attroff(A_REVERSE); mvaddstr(LINES-1, menu_column, " ↑"); attron(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); addstr("|"); attroff(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); addstr("backspace"); attron(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); addstr("|"); attroff(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); addstr("delete"); attron(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); addstr("|"); attroff(COLOR_PAIR(COLOR_PAIR_MENU_ALTERNATE)); addstr("^h "); menu_column += 23; attron(A_REVERSE); draw_string_on_menu("newer"); draw_menu_item("^e", "edit note"); if (cursor < history_array_size) draw_menu_item("^u", "undo everything after this"); attrset(A_NORMAL); } /* return final y containing text */ static int render_wrapped_lua_text (int y, int xmin, int xmax, const char *text) { int x = xmin; move(y, x); for (int j = 0; j < strlen(text); ++j) { char c = text[j]; if (c == '-' && j+1 < strlen(text) && text[j+1] == '-') attron(COLOR_PAIR(COLOR_PAIR_LUA_COMMENT)); if (c != '\n') { addch(text[j]); ++x; if (x >= xmax) { ++y; x = xmin; move(y, x); } } else { /* newline */ ++y; x = xmin; move(y, x); attroff(COLOR_PAIR(COLOR_PAIR_LUA_COMMENT)); } } return y; } void render_recent_changes (lua_State *L, int start_index) { clear(); attrset(A_BOLD); mvaddstr(1, 0, "Recent changes"); attrset(A_NORMAL); int oldtop = lua_gettop(L); lua_getglobal(L, "teliva_program"); int history_array = lua_gettop(L); int history_array_size = luaL_getn(L, history_array); int y = 3; attron(A_REVERSE); for (int i = start_index; i > 0; --i) { attron(A_BOLD); mvprintw(y, 0, "%3d. ", i); attrset(A_NORMAL); lua_rawgeti(L, history_array, i); int t = lua_gettop(L); for (lua_pushnil(L); lua_next(L, t) != 0; lua_pop(L, 1)) { if (strcmp(lua_tostring(L, -2), "__teliva_undo") == 0) { addstr("undo to "); attron(A_BOLD); printw("%d", lua_tointeger(L, -1)); attroff(A_BOLD); y++; continue; } const char *definition_name = lua_tostring(L, -2); if (is_special_history_key(definition_name)) continue; addstr(definition_name); /* save timestamp of binding if available */ lua_getfield(L, t, "__teliva_timestamp"); if (!lua_isnil(L, -1)) { char buffer[128] = {0}; strncpy(buffer, lua_tostring(L, -1), 120); if (buffer[strlen(buffer)-1] == '\n') buffer[strlen(buffer)-1] = '\0'; attron(COLOR_PAIR(COLOR_PAIR_FADE)); printw(" %s", buffer); attroff(COLOR_PAIR(COLOR_PAIR_FADE)); } lua_pop(L, 1); lua_getfield(L, t, "__teliva_note"); if (!lua_isnil(L, -1)) { attron(COLOR_PAIR(COLOR_PAIR_FADE)); printw(" -- %s", lua_tostring(L, -1)); attroff(COLOR_PAIR(COLOR_PAIR_FADE)); } lua_pop(L, 1); y++; const char *definition_contents = lua_tostring(L, -1); y = render_wrapped_lua_text(y, 0, COLS, definition_contents); y++; if (y >= LINES-1) break; /* leave cruft on the stack */ } lua_settop(L, t); /* clean up cruft on the stack */ lua_pop(L, 1); // history element y++; if (y >= LINES-1) break; } lua_pop(L, 1); // history array if (lua_gettop(L) != oldtop) { endwin(); printf("render_recent_changes: memory leak %d -> %d\n", oldtop, lua_gettop(L)); exit(1); } recent_changes_menu(start_index, history_array_size); refresh(); } void add_undo_event(lua_State *L, int cursor) { lua_getglobal(L, "teliva_program"); int history_array = lua_gettop(L); /* create a new table containing the undo event */ lua_createtable(L, /*number of fields per mutation*/2, 0); lua_pushinteger(L, cursor); lua_setfield(L, -2, "__teliva_undo"); /* include timestamp at which event was created */ time_t t; time(&t); char *time_string = ctime(&t); lua_pushstring(L, time_string); lua_setfield(L, -2, "__teliva_timestamp"); /* append the new table to the history of mutations */ int history_array_size = luaL_getn(L, history_array); ++history_array_size; lua_rawseti(L, history_array, history_array_size); /* clean up */ lua_pop(L, 1); } void save_note_to_editor_buffer (lua_State *L, int cursor) { lua_getglobal(L, "teliva_program"); lua_rawgeti(L, -1, cursor); lua_getfield(L, -1, "__teliva_note"); const char *contents = lua_tostring(L, -1); char outfilename[] = "teliva_editor_buffer_XXXXXX"; int outfd = mkstemp(outfilename); if (outfd == -1) { endwin(); perror("save_note_to_editor_buffer: error in creating temporary file"); abort(); } FILE *out = fdopen(outfd, "w"); assert(out != NULL); if (contents != NULL) fprintf(out, "%s", contents); fclose(out); rename(outfilename, "teliva_editor_buffer"); lua_pop(L, 3); /* contents, table at cursor, teliva_program */ } void load_note_from_editor_buffer (lua_State *L, int cursor) { lua_getglobal(L, "teliva_program"); char new_contents[8192] = {0}; read_editor_buffer(new_contents, 8190); lua_rawgeti(L, -1, cursor); lua_pushstring(L, new_contents); lua_setfield(L, -2, "__teliva_note"); lua_pop(L, 2); /* table at cursor, teliva_program */ } void recent_changes_view (lua_State *L) { lua_getglobal(L, "teliva_program"); int history_array = lua_gettop(L); assert(history_array == 1); int history_array_size = luaL_getn(L, history_array); int cursor = history_array_size; lua_pop(L, 1); int quit = 0; while (!quit) { /* refresh state after each operation so we pick up modifications */ render_recent_changes(L, cursor); int c = getch(); switch (c) { case CTRL_X: quit = 1; break; case KEY_DOWN: case ' ': if (cursor > 1) --cursor; break; case KEY_UP: case KEY_BACKSPACE: case DELETE: case CTRL_H: if (cursor < history_array_size) ++cursor; break; case CTRL_E: save_note_to_editor_buffer(L, cursor); /* big picture hotkey unnecessarily available here */ /* TODO: go hotkey is misleading. edits will not be persisted until you return to recent changes */ edit(L, "teliva_editor_buffer"); load_note_from_editor_buffer(L, cursor); save_tlv(L, Image_name); break; case CTRL_U: if (cursor < history_array_size) { add_undo_event(L, cursor); save_tlv(L, Image_name); } break; } } } extern void draw_menu_item (const char* key, const char* name); static void big_picture_menu (void) { attrset(A_REVERSE); for (int x = 0; x < COLS; ++x) mvaddch(LINES-1, x, ' '); attrset(A_NORMAL); extern int menu_column; menu_column = 2; draw_menu_item("^x", "go back"); draw_menu_item("Enter", "submit"); draw_menu_item("^h", "backspace"); draw_menu_item("^u", "clear"); draw_menu_item("^r", "recent changes"); attrset(A_NORMAL); } static int is_current_definition(lua_State *L, const char *definition_name, int current_history_array_index, int history_array_location, int history_array_size) { /* Sequentially scan back through history_array until current_history_array_index. * Is there an earlier definition of definition_name? */ int oldtop = lua_gettop(L); int found = 0; for (int i = history_array_size; i > current_history_array_index; --i) { lua_rawgeti(L, history_array_location, i); int t = lua_gettop(L); for (lua_pushnil(L); lua_next(L, t) != 0;) { lua_pop(L, 1); // value const char *curr = lua_tostring(L, -1); if (strcmp(curr, definition_name) == 0) { found = 1; lua_pop(L, 1); // key break; } // leave key on stack for next iteration } lua_pop(L, 1); // history element if (found) break; } if(oldtop != lua_gettop(L)) { endwin(); printf("%d %d\n", oldtop, lua_gettop(L)); exit(1); } return !found; } void draw_definition_name (const char *definition_name) { attron(COLOR_PAIR(COLOR_PAIR_HIGHLIGHT)); addstr(" "); addstr(definition_name); addstr(" "); attroff(COLOR_PAIR(COLOR_PAIR_HIGHLIGHT)); addstr(" "); } /* return true if submitted */ void big_picture_view (lua_State *L) { restart: clear(); luaL_newmetatable(L, "__teliva_call_graph_depth"); int cgt = lua_gettop(L); // special-case: we don't instrument the call to main, but it's always at depth 1 lua_pushinteger(L, 1); lua_setfield(L, cgt, "main"); // segment definitions by depth lua_getglobal(L, "teliva_program"); int history_array = lua_gettop(L); int history_array_size = luaL_getn(L, history_array); int y = 1; attrset(A_BOLD); mvaddstr(y, 0, "Big picture"); attrset(A_NORMAL); y += 2; mvaddstr(y, 0, "data: "); // first: data (non-functions) that's not the Teliva menu or curses variables for (int i = history_array_size; i > 0; --i) { lua_rawgeti(L, history_array, i); int t = lua_gettop(L); for (lua_pushnil(L); lua_next(L, t) != 0; lua_pop(L, 1)) { const char *definition_name = lua_tostring(L, -2); if (is_special_history_key(definition_name)) continue; lua_getglobal(L, definition_name); int is_userdata = lua_isuserdata(L, -1); int is_function = lua_isfunction(L, -1); lua_pop(L, 1); if (strcmp(definition_name, "menu") != 0 // required by all Teliva programs && !is_function // functions are not data && !is_userdata // including curses window objects // (unlikely to have an interesting definition) ) { if (is_current_definition(L, definition_name, i, history_array, history_array_size)) draw_definition_name(definition_name); } } lua_pop(L, 1); // history element } // second: menu and other userdata for (int i = history_array_size; i > 0; --i) { lua_rawgeti(L, history_array, i); int t = lua_gettop(L); for (lua_pushnil(L); lua_next(L, t) != 0; lua_pop(L, 1)) { const char* definition_name = lua_tostring(L, -2); if (is_special_history_key(definition_name)) continue; lua_getglobal(L, definition_name); int is_userdata = lua_isuserdata(L, -1); lua_pop(L, 1); if (strcmp(definition_name, "menu") == 0 || is_userdata // including curses window objects ) { if (is_current_definition(L, definition_name, i, history_array, history_array_size)) draw_definition_name(definition_name); } } lua_pop(L, 1); // history element } // functions by level y += 2; mvprintw(y, 0, "functions: "); y++; for (int level = 1; ; ++level) { mvaddstr(y, 0, " "); bool drew_anything = false; for (int i = history_array_size; i > 0; --i) { lua_rawgeti(L, history_array, i); int t = lua_gettop(L); for (lua_pushnil(L); lua_next(L, t) != 0; lua_pop(L, 1)) { const char* definition_name = lua_tostring(L, -2); if (is_special_history_key(definition_name)) continue; lua_getfield(L, cgt, definition_name); int depth = lua_tointeger(L, -1); if (depth == level) { if (is_current_definition(L, definition_name, i, history_array, history_array_size)) draw_definition_name(definition_name); drew_anything = true; } lua_pop(L, 1); // depth of value } lua_pop(L, 1); // history element } y += 2; if (!drew_anything) break; } // unused functions mvaddstr(y, 0, " "); for (int i = history_array_size; i > 0; --i) { lua_rawgeti(L, history_array, i); int t = lua_gettop(L); for (lua_pushnil(L); lua_next(L, t) != 0; lua_pop(L, 1)) { const char* definition_name = lua_tostring(L, -2); if (is_special_history_key(definition_name)) continue; lua_getglobal(L, definition_name); int is_function = lua_isfunction(L, -1); lua_pop(L, 1); lua_getfield(L, cgt, definition_name); if (is_function && lua_isnoneornil(L, -1)) if (is_current_definition(L, definition_name, i, history_array, history_array_size)) draw_definition_name(definition_name); lua_pop(L, 1); // depth of value } lua_pop(L, 1); // history element } lua_settop(L, 0); render_previous_error(); char query[CURRENT_DEFINITION_LEN+1] = {0}; int qlen = 0; while (1) { big_picture_menu(); for (int x = 0; x < COLS; ++x) mvaddch(LINES-2, x, ' '); mvprintw(LINES-2, 0, "Edit: %s", query); int c = getch(); if (c == KEY_BACKSPACE || c == DELETE || c == CTRL_H) { if (qlen != 0) query[--qlen] = '\0'; } else if (c == CTRL_X) { return; } else if (c == ENTER) { save_to_current_definition_and_editor_buffer(L, query); int back_to_big_picture = edit_current_definition(L); if (back_to_big_picture) goto restart; return; } else if (c == CTRL_U) { qlen = 0; query[qlen] = '\0'; } else if (c == CTRL_R) { recent_changes_view(L); goto restart; } else if (isprint(c)) { if (qlen < CURRENT_DEFINITION_LEN) { query[qlen++] = c; query[qlen] = '\0'; } } } /* never gets here */ } /* return true if: * - editor_state exists, and * - editor_state is applicable to the current image */ int editor_view_in_progress (lua_State *L) { int status; status = luaL_loadfile(L, "teliva_editor_state"); if (status != 0) return 0; status = docall(L, 0, 0); if (status != 0) return 0; lua_getglobal(L, "__teliva_editor_state"); int editor_state_index = lua_gettop(L); lua_getfield(L, editor_state_index, "image"); const char *image_name = lua_tostring(L, -1); const int result = (strcmp(image_name, Image_name) == 0); lua_settop(L, editor_state_index); return result; } extern int edit_from(lua_State *L, char *filename, int rowoff, int coloff, int cy, int cx); int restore_editor_view (lua_State *L) { lua_getglobal(L, "__teliva_editor_state"); int editor_state_index = lua_gettop(L); lua_getfield(L, editor_state_index, "definition"); const char *definition = lua_tostring(L, -1); save_to_current_definition_and_editor_buffer(L, definition); lua_getfield(L, editor_state_index, "rowoff"); int rowoff = lua_tointeger(L, -1); lua_getfield(L, editor_state_index, "coloff"); int coloff = lua_tointeger(L, -1); lua_getfield(L, editor_state_index, "cy"); int cy = lua_tointeger(L, -1); lua_getfield(L, editor_state_index, "cx"); int cx = lua_tointeger(L, -1); lua_settop(L, editor_state_index); int back_to_big_picture = edit_from(L, "teliva_editor_buffer", rowoff, coloff, cy, cx); // error handling int oldtop = lua_gettop(L); while (1) { int status; status = load_editor_buffer_to_current_definition_in_image(L); if (status == 0 || lua_isnil(L, -1)) break; Previous_error = lua_tostring(L, -1); if (Previous_error == NULL) Previous_error = "(error object is not a string)"; back_to_big_picture = resumeEdit(L); lua_pop(L, 1); } if (lua_gettop(L) != oldtop) { endwin(); printf("edit_from: memory leak %d -> %d\n", oldtop, lua_gettop(L)); exit(1); } return back_to_big_picture; } char **Argv = NULL; extern void cleanup_curses (void); void developer_mode (lua_State *L) { /* clobber the app's ncurses colors; we'll restart the app when we rerun it. */ assume_default_colors(COLOR_FOREGROUND, COLOR_BACKGROUND); init_pair(COLOR_PAIR_NORMAL, COLOR_FOREGROUND, COLOR_BACKGROUND); init_pair(COLOR_PAIR_HIGHLIGHT, COLOR_HIGHLIGHT_FOREGROUND, COLOR_HIGHLIGHT_BACKGROUND); init_pair(COLOR_PAIR_FADE, COLOR_FADE, COLOR_BACKGROUND); init_pair(COLOR_PAIR_MENU_ALTERNATE, COLOR_MENU_ALTERNATE, COLOR_BACKGROUND); init_pair(COLOR_PAIR_LUA_COMMENT, COLOR_LUA_COMMENT, COLOR_BACKGROUND); init_pair(COLOR_PAIR_LUA_KEYWORD, COLOR_LUA_KEYWORD, COLOR_BACKGROUND); init_pair(COLOR_PAIR_LUA_CONSTANT, COLOR_LUA_CONSTANT, COLOR_BACKGROUND); init_pair(COLOR_PAIR_MATCH, COLOR_MATCH_FOREGROUND, COLOR_MATCH_BACKGROUND); init_pair(COLOR_PAIR_ERROR, COLOR_ERROR_FOREGROUND, COLOR_ERROR_BACKGROUND); nodelay(stdscr, 0); /* always make getch() block in developer mode */ curs_set(1); /* always display cursor in developer mode */ int switch_to_big_picture_view = 1; if (editor_view_in_progress(L)) switch_to_big_picture_view = restore_editor_view(L); if (switch_to_big_picture_view) big_picture_view(L); cleanup_curses(); execv(Argv[0], Argv); /* never returns */ } static int handle_luainit (lua_State *L) { const char *init = getenv(LUA_INIT); if (init == NULL) return 0; /* status OK */ else if (init[0] == '@') return dofile(L, init+1); else return dostring(L, init, "=" LUA_INIT); } /* roughly equivalent to: * globalname = require(filename) */ static int dorequire (lua_State *L, const char *filename, const char *globalname) { int status = luaL_loadfile(L, filename) || docall(L, /*nargs*/0, /*don't clean up stack*/0); if (status != 0) return report_in_developer_mode(L, status); if (lua_isnil(L, -1)) { endwin(); printf("%s didn't return a module\n", filename); exit(1); } lua_setglobal(L, globalname); return 0; } struct Smain { int argc; char **argv; int status; }; /* does its own error handling, always returns 0 to prevent duplicate messages */ static int pmain (lua_State *L) { struct Smain *s = (struct Smain *)lua_touserdata(L, 1); char **argv = s->argv; int status; globalL = L; if (argv[0] && argv[0][0]) progname = argv[0]; lua_gc(L, LUA_GCSTOP, 0); /* stop collector during initialization */ luaL_openlibs(L); /* open libraries */ status = dorequire(L, "src/lcurses/curses.lua", "curses"); if (status != 0) return 0; status = dorequire(L, "src/luasocket/socket.lua", "socket"); if (status != 0) return 0; status = dorequire(L, "src/luasocket/url.lua", "url"); if (status != 0) return 0; status = dorequire(L, "src/luasocket/ltn12.lua", "ltn12"); if (status != 0) return 0; status = dorequire(L, "src/luasocket/mime.lua", "mime"); if (status != 0) return 0; status = dorequire(L, "src/luasocket/headers.lua", "headers"); if (status != 0) return 0; status = dorequire(L, "src/luasocket/http.lua", "http"); if (status != 0) return 0; status = dorequire(L, "src/luasec/ssl.lua", "ssl"); if (status != 0) return 0; status = dorequire(L, "src/luasec/https.lua", "https"); if (status != 0) return 0; status = dorequire(L, "src/json.lua", "json"); if (status != 0) return 0; lua_gc(L, LUA_GCRESTART, 0); s->status = handle_luainit(L); if (s->status != 0) return 0; s->status = handle_image(L, argv, 1); if (s->status != 0) return 0; return 0; } extern void draw_menu (lua_State *); int main (int argc, char **argv) { int status; struct Smain s; lua_State *L = luaL_newstate(); if (L == NULL) { l_message(argv[0], "cannot create state: not enough memory"); return EXIT_FAILURE; } if (argc == 1) { print_usage(); exit(1); } setlocale(LC_ALL, ""); initscr(); keypad(stdscr, 1); start_color(); assume_default_colors(COLOR_FOREGROUND, COLOR_BACKGROUND); draw_menu(L); echo(); s.argc = argc; s.argv = argv; Argv = argv; status = lua_cpcall(L, &pmain, &s); report(L, status); lua_close(L); cleanup_curses(); return (status || s.status) ? EXIT_FAILURE : EXIT_SUCCESS; }