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teliva/src/lua.c

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/*
** $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 <assert.h>
#include <ctype.h>
#include <fcntl.h>
#include <locale.h>
#include <ncurses.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#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("^g", "go to highlight");
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) {
/* confusingly, unhighlighted definitions use COLOR_PAIR_HIGHLIGHT */
attron(COLOR_PAIR(COLOR_PAIR_HIGHLIGHT));
addstr(" ");
addstr(definition_name);
addstr(" ");
attroff(COLOR_PAIR(COLOR_PAIR_HIGHLIGHT));
addstr(" ");
}
void draw_highlighted_definition_name (const char *definition_name) {
/* confusingly, highlighted definitions don't use COLOR_PAIR_HIGHLIGHT */
attron(A_REVERSE);
addstr(" ");
addstr(definition_name);
addstr(" ");
attroff(A_REVERSE);
addstr(" ");
}
/* return true if submitted */
void big_picture_view (lua_State *L) {
/* Without any intervening edits, big_picture_view always stably renders
* definitions in exactly the same spatial order, both in levels from top to
* bottom and in indexes within each level from left to right. */
int highlight_level = 0;
int highlight_index_within_level = 0;
int level_size[30] = {0}; /* number of indexes within each level */
char highlight[CURRENT_DEFINITION_LEN+1] = {0};
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
if (highlight_level < 0) highlight_level = 0;
int level = 0;
int index_within_level = 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_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)) {
if (level == highlight_level && index_within_level == highlight_index_within_level) {
draw_highlighted_definition_name(definition_name);
strncpy(highlight, definition_name, CURRENT_DEFINITION_LEN);
} else {
draw_definition_name(definition_name);
}
++index_within_level;
}
}
}
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)) {
if (level == highlight_level && index_within_level == highlight_index_within_level) {
draw_highlighted_definition_name(definition_name);
strncpy(highlight, definition_name, CURRENT_DEFINITION_LEN);
} else {
draw_definition_name(definition_name);
}
++index_within_level;
}
}
}
lua_pop(L, 1); // history element
}
level_size[level] = index_within_level;
level++;
// functions by level
y += 2;
mvprintw(y, 0, "functions: ");
y++;
for (int depth = 1; ; ++depth) {
mvaddstr(y, 0, " ");
bool drew_anything = false;
index_within_level = 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_getfield(L, cgt, definition_name);
int definition_depth = lua_tointeger(L, -1);
if (definition_depth == depth) {
if (is_current_definition(L, definition_name, i, history_array, history_array_size)) {
if (level == highlight_level && index_within_level == highlight_index_within_level) {
draw_highlighted_definition_name(definition_name);
strncpy(highlight, definition_name, CURRENT_DEFINITION_LEN);
} else {
draw_definition_name(definition_name);
}
++index_within_level;
}
drew_anything = true;
}
lua_pop(L, 1); // depth of value
}
lua_pop(L, 1); // history element
}
y += 2;
if (!drew_anything) break;
level_size[level] = index_within_level;
level++;
}
// unused functions
mvaddstr(y, 0, " ");
/* no need to level++ because the final iteration above didn't draw anything */
index_within_level = 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)) {
if (level == highlight_level && index_within_level == highlight_index_within_level) {
draw_highlighted_definition_name(definition_name);
strncpy(highlight, definition_name, CURRENT_DEFINITION_LEN);
} else {
draw_definition_name(definition_name);
}
++index_within_level;
}
}
lua_pop(L, 1); // depth of value
}
lua_pop(L, 1); // history element
}
level_size[level] = index_within_level;
int max_level = level;
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(20, 60, "%d %d\n", highlight_level, highlight_index_within_level);
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';
}
} else if (c == KEY_LEFT) {
highlight_index_within_level--;
if (highlight_index_within_level < 0) highlight_index_within_level = 0;
goto restart;
} else if (c == KEY_RIGHT) {
highlight_index_within_level++;
if (highlight_index_within_level >= level_size[highlight_level])
highlight_index_within_level = level_size[highlight_level]-1;
if (highlight_index_within_level < 0) highlight_index_within_level = 0;
goto restart;
} else if (c == KEY_UP) {
highlight_level--;
if (highlight_level < 0) highlight_level = 0;
if (highlight_index_within_level >= level_size[highlight_level])
highlight_index_within_level = level_size[highlight_level]-1;
if (highlight_index_within_level < 0) highlight_index_within_level = 0;
goto restart;
} else if (c == KEY_DOWN) {
highlight_level++;
if (highlight_level > max_level) highlight_level = max_level;
if (highlight_index_within_level >= level_size[highlight_level])
highlight_index_within_level = level_size[highlight_level]-1;
if (highlight_index_within_level < 0) highlight_index_within_level = 0;
goto restart;
} else if (c == CTRL_G) {
save_to_current_definition_and_editor_buffer(L, highlight);
int back_to_big_picture = edit_current_definition(L);
if (back_to_big_picture) goto restart;
return;
}
}
/* 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 *);
void render_trusted_teliva_data (lua_State *L) {
init_pair(COLOR_PAIR_ERROR, COLOR_ERROR_FOREGROUND, COLOR_ERROR_BACKGROUND);
init_pair(COLOR_PAIR_MENU, COLOR_FOREGROUND, COLOR_BACKGROUND);
draw_menu(L);
}
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);
render_trusted_teliva_data(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;
}
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