1 /* helpfile.c - Help file loading and display
2 * Copyright 2000-2004 srvx Development Team
4 * This file is part of srvx.
6 * srvx is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with srvx; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
28 static const struct message_entry msgtab[] = {
29 { "HFMSG_MISSING_HELPFILE", "The help file could not be found. Sorry!" },
30 { "HFMSG_HELP_NOT_STRING", "Help file error (help data was not a string)." },
34 #define DEFAULT_LINE_SIZE MAX_LINE_SIZE
35 #define DEFAULT_TABLE_SIZE 80
37 extern struct userNode *global, *chanserv, *opserv, *nickserv;
38 struct userNode *message_dest;
39 struct userNode *message_source;
40 struct language *lang_C;
41 struct dict *languages;
43 static void language_cleanup(void)
45 dict_delete(languages);
48 static void language_free_helpfile(void *data)
50 struct helpfile *hf = data;
54 static void language_free(void *data)
56 struct language *lang = data;
57 dict_delete(lang->messages);
58 dict_delete(lang->helpfiles);
63 static struct language *language_alloc(const char *name)
65 struct language *lang = calloc(1, sizeof(*lang));
66 lang->name = strdup(name);
67 lang->parent = lang_C;
69 languages = dict_new();
70 dict_set_free_data(languages, language_free);
72 dict_insert(languages, lang->name, lang);
76 /* Language names should use a lang or lang_COUNTRY type system, where
77 * lang is a two-letter code according to ISO-639-1 (or three-letter
78 * code according to ISO-639-2 for languages not in ISO-639-1), and
79 * COUNTRY is the ISO 3166 country code in all upper case.
82 * http://www.loc.gov/standards/iso639-2/
83 * http://www.loc.gov/standards/iso639-2/langhome.html
84 * http://www.iso.ch/iso/en/prods-services/iso3166ma/index.html
86 struct language *language_find(const char *name)
88 struct language *lang;
89 char alt_name[MAXLEN];
92 if ((lang = dict_find(languages, name, NULL)))
94 if ((uscore = strchr(name, '_'))) {
95 strncpy(alt_name, name, uscore-name);
96 alt_name[uscore-name] = 0;
97 if ((lang = dict_find(languages, alt_name, NULL)))
101 lang_C = language_alloc("C");
102 lang_C->messages = dict_new();
103 lang_C->helpfiles = dict_new();
108 static void language_set_messages(struct language *lang, dict_t dict)
110 dict_iterator_t it, it2;
111 struct record_data *rd;
116 for (it = dict_first(dict), it2 = dict_first(lang_C->messages); it; ) {
117 const char *msgid = iter_key(it);
118 int diff = it2 ? irccasecmp(msgid, iter_key(it2)) : -1;
123 } else if (diff > 0) {
125 it2 = iter_next(it2);
131 msg = strdup(rd->d.qstring);
133 case RECDB_STRING_LIST:
134 /* XXX: maybe do an unlistify_help() type thing */
136 log_module(MAIN_LOG, LOG_WARNING, "Unsupported record type for message %s in language %s", msgid, lang->name);
139 dict_insert(lang->messages, msgid, msg);
141 it2 = iter_next(it2);
145 it2 = iter_next(it2);
147 log_module(MAIN_LOG, LOG_WARNING, "In language %s, %d extra and %d missing messages", lang->name, extra, missing);
150 static struct language *language_read(const char *name)
153 struct dirent *dirent;
154 struct language *lang;
156 char filename[MAXLEN], *uscore;
160 /* Never try to read the C language from disk. */
161 if (!irccasecmp(name, "C"))
164 /* Open the directory stream; if we can't, fail. */
165 snprintf(filename, sizeof(filename), "languages/%s", name);
166 if (!(dir = opendir(filename)))
168 if (!(lang = dict_find(languages, name, NULL)))
169 lang = language_alloc(name);
171 /* Find the parent language. */
172 snprintf(filename, sizeof(filename), "languages/%s/parent", name);
173 if (!(file = fopen(filename, "r"))
174 || !fgets(filename, sizeof(filename), file)) {
175 strcpy(filename, "C");
177 if (!(lang->parent = language_find(filename))) {
178 uscore = strchr(filename, '_');
181 lang->parent = language_find(filename);
184 lang->parent = lang_C;
187 /* (Re-)initialize the language's dicts. */
188 dict_delete(lang->messages);
189 lang->messages = dict_new();
190 dict_set_free_data(lang->messages, free);
191 lang->helpfiles = dict_new();
192 dict_set_free_data(lang->helpfiles, language_free_helpfile);
194 /* Read all the translations from the directory. */
195 while ((dirent = readdir(dir))) {
196 snprintf(filename, sizeof(filename), "languages/%s/%s", name, dirent->d_name);
197 if (!strcmp(dirent->d_name,"parent")) {
199 } else if (!strcmp(dirent->d_name, "strings.db")) {
200 dict = parse_database(filename);
201 language_set_messages(lang, dict);
203 } else if ((hf = dict_find(lang_C->helpfiles, dirent->d_name, NULL))) {
204 hf = open_helpfile(filename, hf->expand);
205 dict_insert(lang->helpfiles, hf->name, hf);
214 static void language_read_list(void)
216 struct dirent *dirent;
219 if (!(dir = opendir("languages")))
221 while ((dirent = readdir(dir)))
222 language_alloc(dirent->d_name);
226 static void language_read_all(void)
228 struct string_list *slist;
229 struct dirent *dirent;
233 /* Read into an in-memory list and sort so we are likely to load
234 * parent languages before their children (de_DE sorts after de).
236 if (!(dir = opendir("languages")))
238 slist = alloc_string_list(4);
239 while ((dirent = readdir(dir)))
240 string_list_append(slist, strdup(dirent->d_name));
242 string_list_sort(slist);
243 for (ii = 0; ii < slist->used; ++ii) {
244 if (!strcmp(slist->list[ii], ".") || !strcmp(slist->list[ii], ".."))
246 language_read(slist->list[ii]);
248 free_string_list(slist);
251 const char *language_find_message(struct language *lang, const char *msgid) {
252 struct language *curr;
256 for (curr = lang; curr; curr = curr->parent)
257 if ((msg = dict_find(curr->messages, msgid, NULL)))
259 log_module(MAIN_LOG, LOG_ERROR, "Tried to find unregistered message \"%s\" (original language %s)", msgid, lang->name);
264 table_send(struct userNode *from, const char *to, unsigned int size, irc_send_func irc_send, struct helpfile_table table) {
265 unsigned int ii, jj, len, nreps, reps, tot_width, pos, spaces, *max_width;
266 char line[MAX_LINE_SIZE+1];
267 struct handle_info *hi;
269 if (IsChannelName(to) || *to == '$') {
273 message_dest = GetUserH(to);
275 log_module(MAIN_LOG, LOG_ERROR, "Unable to find user with nickname %s (in table_send from %s).", to, from->nick);
278 hi = message_dest->handle_info;
279 #ifdef WITH_PROTOCOL_P10
280 to = message_dest->numeric;
283 message_source = from;
285 /* If size or irc_send are 0, we should try to use a default. */
289 size = DEFAULT_TABLE_SIZE;
290 else if (hi->table_width)
291 size = hi->table_width;
292 else if (hi->screen_width)
293 size = hi->screen_width;
295 size = DEFAULT_TABLE_SIZE;
298 {} /* use that function */
300 irc_send = HANDLE_FLAGGED(hi, USE_PRIVMSG) ? irc_privmsg : irc_notice;
302 irc_send = IsChannelName(to) ? irc_privmsg : irc_notice;
304 /* Limit size to how much we can show at once */
305 if (size > sizeof(line))
308 /* Figure out how wide columns should be */
309 max_width = alloca(table.width * sizeof(int));
310 for (jj=tot_width=0; jj<table.width; jj++) {
311 /* Find the widest width for this column */
313 for (ii=0; ii<table.length; ii++) {
314 len = strlen(table.contents[ii][jj]);
315 if (len > max_width[jj])
318 /* Separate columns with spaces */
319 tot_width += max_width[jj] + 1;
321 /* How many rows to put in a line? */
322 if ((table.flags & TABLE_REPEAT_ROWS) && (size > tot_width))
323 nreps = size / tot_width;
326 /* Send headers line.. */
327 if (table.flags & TABLE_NO_HEADERS) {
330 /* Sending headers needs special treatment: either show them
331 * once, or repeat them as many times as we repeat the columns
333 for (pos=ii=0; ii<((table.flags & TABLE_REPEAT_HEADERS)?nreps:1); ii++) {
335 len = strlen(table.contents[0][jj]);
336 spaces = max_width[jj] - len;
337 if (table.flags & TABLE_PAD_LEFT)
340 memcpy(line+pos, table.contents[0][jj], len);
342 if (++jj == table.width)
344 if (!(table.flags & TABLE_PAD_LEFT))
351 irc_send(from, to, line);
354 /* Send the table. */
355 for (jj=0, pos=0, reps=0; ii<table.length; ) {
357 len = strlen(table.contents[ii][jj]);
358 spaces = max_width[jj] - len;
359 if (table.flags & TABLE_PAD_LEFT)
360 while (spaces--) line[pos++] = ' ';
361 memcpy(line+pos, table.contents[ii][jj], len);
363 if (++jj == table.width) {
364 jj = 0, ++ii, ++reps;
365 if ((reps == nreps) || (ii == table.length)) {
367 irc_send(from, to, line);
372 if (!(table.flags & TABLE_PAD_LEFT))
378 if (!(table.flags & TABLE_NO_FREE)) {
379 /* Deallocate table memory (but not the string memory). */
380 for (ii=0; ii<table.length; ii++)
381 free(table.contents[ii]);
382 free(table.contents);
387 vsend_message(const char *dest, struct userNode *src, struct handle_info *handle, int msg_type, expand_func_t expand_f, const char *format, va_list al)
389 void (*irc_send)(struct userNode *from, const char *to, const char *msg);
390 static struct string_buffer input;
391 unsigned int size, ipos, pos, length, chars_sent, use_color;
392 unsigned int expand_pos, expand_ipos, newline_ipos;
393 char line[MAX_LINE_SIZE];
395 if (IsChannelName(dest) || *dest == '$') {
397 } else if (!(message_dest = GetUserH(dest))) {
398 log_module(MAIN_LOG, LOG_ERROR, "Unable to find user with nickname %s (in vsend_message from %s).", dest, src->nick);
400 } else if (message_dest->dead) {
401 /* No point in sending to a user who is leaving. */
404 #ifdef WITH_PROTOCOL_P10
405 dest = message_dest->numeric;
408 message_source = src;
409 if (!(msg_type & 4) && !(format = handle_find_message(handle, format)))
411 /* fill in a buffer with the string */
413 string_buffer_append_vprintf(&input, format, al);
415 /* figure out how to send the messages */
417 msg_type |= (HANDLE_FLAGGED(handle, USE_PRIVMSG) ? 1 : 0);
418 use_color = HANDLE_FLAGGED(handle, MIRC_COLOR);
419 size = handle->screen_width;
420 if (size > sizeof(line))
427 size = DEFAULT_LINE_SIZE;
428 switch (msg_type & 3) {
430 irc_send = irc_notice;
433 irc_send = irc_wallchops;
437 irc_send = irc_privmsg;
440 /* This used to be two passes, but if you do that and allow
441 * arbitrary sizes for ${}-expansions (as with help indexes),
442 * that requires a very big intermediate buffer.
444 expand_ipos = newline_ipos = ipos = 0;
445 expand_pos = pos = 0;
447 while (input.list[ipos]) {
448 char ch, *value, *free_value;
450 while ((ch = input.list[ipos]) && (ch != '$') && (ch != '\n') && (pos < size)) {
455 if (!input.list[ipos])
457 if (input.list[ipos] == '\n') {
462 unsigned int new_ipos;
463 /* Scan backwards for a space in the input, until we hit
464 * either the last newline or the last variable expansion.
465 * Print the line up to that point, and start from there.
467 for (new_ipos = ipos;
468 (new_ipos > expand_ipos) && (new_ipos > newline_ipos);
470 if (input.list[new_ipos] == ' ')
472 pos -= ipos - new_ipos;
473 if (new_ipos == newline_ipos) {
474 /* Single word was too big to fit on one line; skip
475 * forward to its end and print it as a whole.
477 while (input.list[new_ipos]
478 && (input.list[new_ipos] != ' ')
479 && (input.list[new_ipos] != '\n')
480 && (input.list[new_ipos] != '$'))
481 line[pos++] = input.list[new_ipos++];
484 while (input.list[ipos] == ' ')
490 switch (input.list[++ipos]) {
491 /* Literal '$' or end of string. */
497 /* The following two expand to mIRC color codes if enabled
500 value = use_color ? "\002" : "";
503 value = use_color ? "\017" : "";
506 value = use_color ? "\026" : "";
509 value = use_color ? "\037" : "";
516 value = global ? global->nick : "Global";
519 value = chanserv ? chanserv->nick : "ChanServ";
522 value = opserv ? opserv->nick : "OpServ";
525 value = nickserv ? nickserv->nick : "NickServ";
531 value = handle ? handle->handle : "Account";
533 #define SEND_LINE() do { line[pos] = 0; if (pos > 0) irc_send(src, dest, line); chars_sent += pos; pos = 0; newline_ipos = ipos; } while (0)
534 /* Custom expansion handled by helpfile-specific function. */
538 char *name_end = input.list + ipos + 1;
540 while (*name_end != '}' && *name_end != ')' && *name_end) name_end++;
542 struct helpfile_expansion exp;
544 exp = expand_f(input.list + ipos + 1);
547 free_value = value = exp.value.str;
552 /* Must send current line, then emit table. */
554 table_send(src, (message_dest ? message_dest->nick : dest), 0, irc_send, exp.value.table);
559 log_module(MAIN_LOG, LOG_ERROR, "Invalid exp.type %d from expansion function %p.", exp.type, expand_f);
562 ipos = name_end - input.list;
567 /* Let it fall through when there's no expansion function or
572 value[1] = input.list[ipos];
576 while ((pos + strlen(value) > size) || strchr(value, '\n')) {
578 avail = size - pos - 1;
579 length = strcspn(value, "\n ");
580 if (length <= avail) {
581 strncpy(line+pos, value, length);
584 /* copy over spaces, until (possible) end of line */
585 while (*value == ' ') {
587 line[pos++] = *value;
591 /* word to send is too big to send now.. what to do? */
593 /* try to put it on a separate line */
596 /* already at start of line; only send part of it */
597 strncpy(line, value, avail);
600 /* skip any trailing spaces */
601 while (*value == ' ')
605 /* if we're looking at a newline, send the accumulated text */
606 if (*value == '\n') {
611 length = strlen(value);
612 memcpy(line + pos, value, length);
616 if ((pos < size-1) && input.list[ipos]) {
631 send_message(struct userNode *dest, struct userNode *src, const char *format, ...)
636 if (IsLocal(dest)) return 0;
637 va_start(ap, format);
638 res = vsend_message(dest->nick, src, dest->handle_info, 0, NULL, format, ap);
644 send_message_type(int msg_type, struct userNode *dest, struct userNode *src, const char *format, ...) {
648 if (IsLocal(dest)) return 0;
649 va_start(ap, format);
650 res = vsend_message(dest->nick, src, dest->handle_info, msg_type, NULL, format, ap);
656 send_target_message(int msg_type, const char *dest, struct userNode *src, const char *format, ...)
661 va_start(ap, format);
662 res = vsend_message(dest, src, NULL, msg_type, NULL, format, ap);
668 _send_help(struct userNode *dest, struct userNode *src, expand_func_t expand, const char *format, ...)
673 va_start(ap, format);
674 res = vsend_message(dest->nick, src, dest->handle_info, 4, expand, format, ap);
680 send_help(struct userNode *dest, struct userNode *src, struct helpfile *hf, const char *topic)
682 struct helpfile *lang_hf;
683 struct record_data *rec;
684 struct language *curr;
689 _send_help(dest, src, NULL, "HFMSG_MISSING_HELPFILE");
692 for (curr = (dest->handle_info ? dest->handle_info->language : lang_C);
694 curr = curr->parent) {
695 lang_hf = dict_find(curr->helpfiles, hf->name, NULL);
698 rec = dict_find(lang_hf->db, topic, NULL);
699 if (rec && rec->type == RECDB_QSTRING)
700 return _send_help(dest, src, hf->expand, rec->d.qstring);
702 rec = dict_find(hf->db, "<missing>", NULL);
704 return send_message(dest, src, "MSG_TOPIC_UNKNOWN");
705 if (rec->type != RECDB_QSTRING)
706 return send_message(dest, src, "HFMSG_HELP_NOT_STRING");
707 return _send_help(dest, src, hf->expand, rec->d.qstring);
710 /* Grammar supported by this parser:
711 * condition = expr | prefix expr
712 * expr = atomicexpr | atomicexpr op atomicexpr
713 * op = '&&' | '||' | 'and' | 'or'
714 * atomicexpr = '(' expr ')' | identifier
715 * identifier = ( '0'-'9' 'A'-'Z' 'a'-'z' '-' '_' '/' )+ | ! identifier
717 * Whitespace is ignored. The parser is implemented as a recursive
718 * descent parser by functions like:
719 * static int helpfile_eval_<element>(const char *start, const char **end);
728 static const struct {
731 } helpfile_operators[] = {
732 { "&&", OP_BOOL_AND },
733 { "and", OP_BOOL_AND },
734 { "||", OP_BOOL_OR },
735 { "or", OP_BOOL_OR },
739 static const char *identifier_chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_/";
741 static int helpfile_eval_expr(const char *start, const char **end);
742 static int helpfile_eval_atomicexpr(const char *start, const char **end);
743 static int helpfile_eval_identifier(const char *start, const char **end);
746 helpfile_eval_identifier(const char *start, const char **end)
748 /* Skip leading whitespace. */
749 while (isspace(*start) && (start < *end))
752 log_module(MAIN_LOG, LOG_FATAL, "Expected identifier in helpfile condition.");
756 if (start[0] == '!') {
757 int res = helpfile_eval_identifier(start+1, end);
761 } else if (start[0] == '/') {
763 char *id_str, *value;
766 strchr(identifier_chars, sep[0]) && (sep < *end);
768 memcpy(id_str = alloca(sep+1-start), start, sep-start);
769 id_str[sep-start] = '\0';
770 value = conf_get_data(id_str+1, RECDB_QSTRING);
774 return enabled_string(value) || true_string(value);
775 } else if ((*end - start >= 4) && !ircncasecmp(start, "true", 4)) {
778 } else if ((*end - start >= 5) && !ircncasecmp(start, "false", 5)) {
782 log_module(MAIN_LOG, LOG_FATAL, "Unexpected helpfile identifier '%.*s'.", *end-start, start);
788 helpfile_eval_atomicexpr(const char *start, const char **end)
793 /* Skip leading whitespace. */
794 while (isspace(*start) && (start < *end))
797 log_module(MAIN_LOG, LOG_FATAL, "Expected atomic expression in helpfile condition.");
801 /* If it's not parenthesized, it better be a valid identifier. */
803 return helpfile_eval_identifier(start, end);
805 /* Parse the internal expression. */
808 res = helpfile_eval_expr(start, &sep);
810 /* Check for the closing parenthesis. */
811 while (isspace(*sep) && (sep < *end))
813 if ((sep == *end) || (sep[0] != ')')) {
814 log_module(MAIN_LOG, LOG_FATAL, "Expected close parenthesis at '%.*s'.", *end-sep, sep);
818 /* Report the end location and result. */
824 helpfile_eval_expr(const char *start, const char **end)
826 const char *sep, *sep2;
827 unsigned int ii, len;
831 /* Parse the first atomicexpr. */
833 res_a = helpfile_eval_atomicexpr(start, &sep);
837 /* Figure out what follows that. */
838 while (isspace(*sep) && (sep < *end))
843 for (ii = 0; helpfile_operators[ii].str; ++ii) {
844 len = strlen(helpfile_operators[ii].str);
845 if (ircncasecmp(sep, helpfile_operators[ii].str, len))
847 op = helpfile_operators[ii].op;
850 if (op == OP_INVALID) {
851 log_module(MAIN_LOG, LOG_FATAL, "Unrecognized helpfile operator at '%.*s'.", *end-sep, sep);
855 /* Parse the next atomicexpr. */
857 res_b = helpfile_eval_atomicexpr(sep, &sep2);
861 /* Make sure there's no trailing garbage */
862 while (isspace(*sep2) && (sep2 < *end))
865 log_module(MAIN_LOG, LOG_FATAL, "Trailing garbage in helpfile expression: '%.*s'.", *end-sep2, sep2);
869 /* Record where we stopped parsing. */
872 /* Do the logic on the subexpressions. */
875 return res_a && res_b;
877 return res_a || res_b;
884 helpfile_eval_condition(const char *start, const char **end)
888 /* Skip the prefix if there is one. */
889 for (term = start; isalnum(*term) && (term < *end); ++term) ;
891 if ((term + 2 >= *end) || (term[0] != ':') || (term[1] != ' ')) {
892 log_module(MAIN_LOG, LOG_FATAL, "In helpfile condition '%.*s' expected prefix to end with ': '.", *end-start, start);
898 /* Evaluate the remaining string as an expression. */
899 return helpfile_eval_expr(start, end);
903 unlistify_help(const char *key, void *data, void *extra)
905 struct record_data *rd = data;
906 dict_t newdb = extra;
910 dict_insert(newdb, strdup(key), alloc_record_data_qstring(GET_RECORD_QSTRING(rd)));
912 case RECDB_STRING_LIST: {
913 struct string_list *slist = GET_RECORD_STRING_LIST(rd);
915 unsigned int totlen, len, i;
917 for (i=totlen=0; i<slist->used; i++)
918 totlen = totlen + strlen(slist->list[i]) + 1;
919 dest = alloca(totlen+1);
920 for (i=totlen=0; i<slist->used; i++) {
921 len = strlen(slist->list[i]);
922 memcpy(dest+totlen, slist->list[i], len);
923 dest[totlen+len] = '\n';
924 totlen = totlen + len + 1;
927 dict_insert(newdb, strdup(key), alloc_record_data_qstring(dest));
933 for (it = dict_first(GET_RECORD_OBJECT(rd)); it; it = iter_next(it)) {
934 const char *k2, *end;
937 /* Evaluate the expression for this subentry. */
939 end = k2 + strlen(k2);
940 res = helpfile_eval_condition(k2, &end);
941 /* If the evaluation failed, bail. */
943 log_module(MAIN_LOG, LOG_FATAL, " .. while processing entry '%s' condition '%s'.", key, k2);
946 /* If the condition was false, try another. */
949 /* If we cannot unlistify the contents, bail. */
950 if (unlistify_help(key, iter_data(it), extra))
954 /* If none of the conditions apply, just omit the entry. */
963 open_helpfile(const char *fname, expand_func_t expand)
967 dict_t db = parse_database(fname);
968 hf = calloc(1, sizeof(*hf));
970 hf->db = alloc_database();
971 dict_set_free_keys(hf->db, free);
972 if ((slash = strrchr(fname, '/'))) {
973 hf->name = strdup(slash + 1);
975 hf->name = strdup(fname);
976 dict_insert(language_find("C")->helpfiles, hf->name, hf);
979 dict_foreach(db, unlistify_help, hf->db);
985 void close_helpfile(struct helpfile *hf)
989 free((char*)hf->name);
990 free_database(hf->db);
994 void message_register_table(const struct message_entry *table)
998 while (table->msgid) {
999 dict_insert(lang_C->messages, table->msgid, (char*)table->format);
1004 void helpfile_init(void)
1006 message_register_table(msgtab);
1007 language_read_list();
1010 void helpfile_finalize(void)
1012 language_read_all();
1013 reg_exit_func(language_cleanup);