2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2010, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program 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 this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See files README, COPYING and CREDITS in the root of the source
23 * tree for related information and legal notices. It is expected
24 * that future projects/authors will amend these files as needed.
28 * xundump.c: Load back xdump output
30 * Known contributors to this file:
31 * Ron Koenderink, 2005
32 * Markus Armbruster, 2005-2008
36 * See doc/xdump! And keep it up-to-date.
38 * Parsing of machine-readable xdump is not precise: it recognizes
39 * comments, accepts whitespace in place of single space, and accepts
40 * the full human-readable field syntax instead of its machine-
44 * - Normalize terminology: table/rows/columns or file/records/fields
45 * - Loading tables with NSC_STRING elements more than once leaks memory
47 * - Check each partial table supplies the same rows
48 * - Check EFF_CFG tables are dense
49 * - Symbolic array indexes
50 * - Option to treat missing and unknown fields as warning, not error
51 * TODO, but hardly worth the effort:
52 * - Permit reordering of array elements
69 static char *fname; /* Name of file being read */
70 static int lineno; /* Current line number */
71 static int human; /* Reading human-readable syntax? */
72 static int ellipsis; /* Header ended with ...? */
73 static int is_partial; /* Is input split into parts? */
74 static int cur_type; /* Current table's file type */
75 static void *cur_obj; /* The object being read into */
76 static int cur_id; /* and its index in the table */
77 static int cur_obj_is_blank;
78 static int nflds; /* #fields in input records */
79 static struct castr **fldca; /* Map field number to selector */
80 static int *fldidx; /* Map field number to index */
81 static int *caflds; /* Map selector number to #fields seen */
82 static int *cafldspp; /* ditto, in previous parts */
84 static int gripe(char *, ...) ATTRIBUTE((format (printf, 1, 2)));
85 static int deffld(int, char *, int);
86 static int defellipsis(void);
87 static int chkflds(void);
88 static int setnum(int, double);
89 static int setstr(int, char *);
90 static int xunsymbol(char *, struct castr *, int);
91 static int setsym(int, char *);
92 static int mtsymset(int, long *);
93 static int add2symset(int, long *, char *);
94 static int xubody(FILE *);
95 static int xutail(FILE *, struct castr *);
98 * Gripe about the current line to stderr, return -1.
101 gripe(char *fmt, ...)
105 fprintf(stderr, "%s:%d: ", fname, lineno);
107 vfprintf(stderr, fmt, ap);
115 * Read and ignore field separators from FP.
116 * Return first character that is not a field separator.
125 } while (ch == ' ' || ch == '\t');
130 } while (ch != EOF && ch != '\n');
137 * Decode escape sequences in BUF.
138 * Return BUF on success, null pointer on failure.
150 if (sscanf(++src, "%3o%n", &octal_chr, &n) != 1 || n != 3)
152 *dst++ = (char)octal_chr;
162 * Read an identifier from FP into BUF.
163 * BUF must have space for 1024 characters.
164 * Return number of characters read on success, -1 on failure.
167 getid(FILE *fp, char *buf)
170 if (fscanf(fp, "%1023[^\"#()<>= \t\n]%n", buf, &n) != 1
178 * Try to read a field name from FP.
179 * I is the field number, counting from zero.
180 * If a name is read, set fldca[I] and fldidx[I] for it, and update
182 * Return 1 if a name or ... was read, 0 on end of line, -1 on error.
185 xufldname(FILE *fp, int i)
193 return gripe("Unexpected EOF");
200 if (getc(fp) != '.' || getc(fp) != '.')
201 return gripe("Junk in header field %d", i + 1);
202 if (defellipsis() < 0)
205 if (ch != EOF && ch != '\n')
206 return gripe("Junk after ...");
211 if (getid(fp, buf) < 0)
212 return gripe("Junk in header field %d", i + 1);
216 return deffld(i, buf, -1);
220 if (isdigit(ch) || ch == '-' || ch == '+') {
221 if (fscanf(fp, "%d", &idx) != 1)
222 return gripe("Malformed number in index of header field %d",
225 return gripe("Index must not be negative in header field %d",
228 if (getid(fp, buf) < 0)
229 return gripe("Malformed index in header field %d", i + 1);
230 return gripe("Symbolic index in header field %d not yet implemented",
235 return gripe("Malformed index in header field %d", i + 1);
236 return deffld(i, buf, idx);
241 * Try to read a field value from FP.
242 * I is the field number, counting from zero.
243 * Return 1 if a value was read, 0 on end of line, -1 on error.
246 xufld(FILE *fp, int i)
256 return gripe("Unexpected EOF");
258 CANT_HAPPEN(i > nflds);
260 if (fldca[i]->ca_type != NSC_STRINGY && fldca[i]->ca_len)
261 return gripe("Field %s(%d) missing",
262 fldca[i]->ca_name, fldidx[i]);
263 return gripe("Field %s missing", fldca[i]->ca_name);
267 case '+': case '-': case '.':
268 case '0': case '1': case '2': case '3': case '4':
269 case '5': case '6': case '7': case '8': case '9':
271 if (fscanf(fp, "%lg", &dbl) != 1)
272 return gripe("Malformed number in field %d", i + 1);
273 return setnum(i, dbl);
280 if (fscanf(fp, "%1023[^\"\n]", buf) != 1 || getc(fp) != '"')
281 return gripe("Malformed string in field %d", i + 1);
283 return gripe("Invalid escape sequence in field %d",
286 return setstr(i, buf);
288 if (mtsymset(i, &set) < 0)
292 if (ch == EOF || ch == '\n')
293 return gripe("Unmatched '(' in field %d", i + 1);
297 if (getid(fp, buf) < 0)
298 return gripe("Junk in field %d", i + 1);
299 if (add2symset(i, &set, buf) < 0)
302 return setnum(i, set);
305 if (getid(fp, buf) < 0)
306 return gripe("Junk in field %d", i + 1);
307 if (!strcmp(buf, "nil"))
308 return setstr(i, NULL);
310 return setsym(i, buf);
315 * Read fields from FP.
316 * Use PARSE() to read each field.
317 * Return number of fields read on success, -1 on error.
320 xuflds(FILE *fp, int (*parse)(FILE *, int))
333 else if (ch != ' ' && ch != '\t')
334 return gripe("Bad field separator after field %d", i + 1);
339 * Define the FLDNO-th field.
340 * If IDX is negative, define as selector NAME, else as NAME(IDX).
341 * Set fldca[FLDNO] and fldidx[FLDNO] accordingly.
343 * Return 1 on success, -1 on error.
346 deffld(int fldno, char *name, int idx)
348 struct castr *ca = ef_cadef(cur_type);
351 res = stmtch(name, ca, offsetof(struct castr, ca_name),
352 sizeof(struct castr));
354 return gripe("Header %s of field %d is %s", name, fldno + 1,
355 res == M_NOTUNIQUE ? "ambiguous" : "unknown");
356 if (ca[res].ca_flags == NSC_EXTRA || CANT_HAPPEN(ca[res].ca_get))
357 return gripe("Extraneous header %s in field %d", name, fldno + 1);
358 if (ca[res].ca_type != NSC_STRINGY && ca[res].ca_len != 0) {
360 return gripe("Header %s requires an index in field %d",
361 ca[res].ca_name, fldno + 1);
362 if (idx >= ca[res].ca_len)
363 return gripe("Header %s(%d) index out of bounds in field %d",
364 ca[res].ca_name, idx, fldno + 1);
365 if (idx < caflds[res])
366 return gripe("Duplicate header %s(%d) in field %d",
367 ca[res].ca_name, idx, fldno + 1);
368 if (idx > caflds[res])
369 return gripe("Expected header %s(%d) in field %d",
370 ca[res].ca_name, caflds[res], fldno + 1);
373 return gripe("Header %s doesn't take an index in field %d",
374 ca[res].ca_name, fldno + 1);
377 return gripe("Duplicate header %s in field %d",
378 ca[res].ca_name, fldno + 1);
380 fldca[fldno] = &ca[res];
387 * Record that header ends with ...
388 * Set ellipsis and is_partial.
389 * Return 0 on success, -1 on error.
394 struct castr *ca = ef_cadef(cur_type);
396 if (ca[0].ca_table != cur_type)
397 return gripe("Table %s doesn't support ...", ef_nameof(cur_type));
398 ellipsis = is_partial = 1;
403 * Check fields in xdump are sane.
404 * Return 0 on success, -1 on error.
409 struct castr *ca = ef_cadef(cur_type);
410 int i, len, cafldsmax, res = 0;
413 /* Need a join field, use 0-th selector */
415 return gripe("Header field %s required with ...", ca[0].ca_name);
421 for (i = 0; ca[i].ca_name; i++) {
422 cafldsmax = MAX(caflds[i], cafldspp[i]);
423 if (ca[i].ca_flags & NSC_EXTRA)
425 len = ca[i].ca_type != NSC_STRINGY ? ca[i].ca_len : 0;
426 if (!len && !cafldsmax)
427 res = gripe("Header field %s missing", ca[i].ca_name);
428 else if (len && cafldsmax == len - 1)
429 res = gripe("Header field %s(%d) missing",
430 ca[i].ca_name, len - 1);
431 else if (len && cafldsmax < len - 1)
432 res = gripe("Header fields %s(%d) ... %s(%d) missing",
433 ca[i].ca_name, cafldsmax, ca[i].ca_name, len - 1);
440 * Get selector for field FLDNO.
441 * Assign the field's selector index to *IDX, unless it is null.
442 * Return the selector on success, null pointer on error.
444 static struct castr *
445 getfld(int fldno, int *idx)
447 if (fldno >= nflds) {
448 gripe("Too many fields, expected only %d", nflds);
451 if (CANT_HAPPEN(fldno < 0))
454 *idx = fldidx[fldno];
459 * Is a new value for field FLDNO required to match the old one?
462 fldval_must_match(int fldno)
464 struct castr *ca = ef_cadef(cur_type);
465 int i = fldca[fldno] - ca;
468 * Value must match if:
469 * it's for a const selector, unless the object is still blank, or
470 * it was already given in a previous part of a split table.
472 return (!cur_obj_is_blank && (fldca[fldno]->ca_flags & NSC_CONST))
473 || fldidx[fldno] < cafldspp[i];
477 * Get the current object.
478 * Store it in cur_obj, and set cur_obj_is_blank accordingly.
479 * Return cur_obj, which is null on error.
484 struct empfile *ep = &empfile[cur_type];
487 cur_obj_is_blank = cur_id >= ep->fids;
488 if (cur_obj_is_blank) {
489 if (ef_ensure_space(cur_type, cur_id, 1))
490 cur_obj = ef_ptr(cur_type, cur_id);
491 /* FIXME diagnose out of dynamic memory vs. static table full */
493 gripe("Can't put ID %d into table %s, it holds only 0..%d.",
494 cur_id, ep->name, ep->fids - 1);
496 cur_obj = ef_ptr(cur_type, cur_id);
503 * Set value of field FLDNO in current object to DBL.
504 * Return 1 on success, -1 on error.
507 setnum(int fldno, double dbl)
514 ca = getfld(fldno, &idx);
519 * If this is the record index, put it into cur_id.
521 if (fldno == 0 && ca->ca_table == cur_type)
527 memb_ptr += ca->ca_off;
529 /* FIXME check assignment preserves value */
530 switch (ca->ca_type) {
532 old = ((signed char *)memb_ptr)[idx];
533 ((signed char *)memb_ptr)[idx] = (signed char)dbl;
537 old = ((unsigned char *)memb_ptr)[idx];
538 ((unsigned char *)memb_ptr)[idx] = (unsigned char)dbl;
541 old = ((short *)memb_ptr)[idx];
542 ((short *)memb_ptr)[idx] = (short)dbl;
545 old = ((unsigned short *)memb_ptr)[idx];
546 ((unsigned short *)memb_ptr)[idx] = (unsigned short)dbl;
549 old = ((int *)memb_ptr)[idx];
550 ((int *)memb_ptr)[idx] = (int)dbl;
553 old = ((long *)memb_ptr)[idx];
554 ((long *)memb_ptr)[idx] = (long)dbl;
557 old = ((coord *)memb_ptr)[idx];
558 /* FIXME use variant of xrel() that takes orig instead of nation */
559 if (old >= WORLD_X / 2)
561 ((coord *)memb_ptr)[idx] = XNORM((coord)dbl);
564 old = ((coord *)memb_ptr)[idx];
565 /* FIXME use variant of yrel() that takes orig instead of nation */
566 if (old >= WORLD_Y / 2)
568 ((coord *)memb_ptr)[idx] = YNORM((coord)dbl);
571 old = ((float *)memb_ptr)[idx];
572 ((float *)memb_ptr)[idx] = (float)dbl;
575 old = ((double *)memb_ptr)[idx];
576 ((double *)memb_ptr)[idx] = dbl;
579 old = ((time_t *)memb_ptr)[idx];
580 ((time_t *)memb_ptr)[idx] = (time_t)dbl;
583 return gripe("Field %d doesn't take numbers", fldno + 1);
586 if (fldval_must_match(fldno) && old != dbl)
587 return gripe("Value for field %d must be %g", fldno + 1, old);
593 * Set value of field FLDNO in current object to STR.
594 * Return 1 on success, -1 on error.
597 setstr(int fldno, char *str)
602 char *memb_ptr, *old;
604 ca = getfld(fldno, &idx);
611 memb_ptr += ca->ca_off;
612 must_match = fldval_must_match(fldno);
614 switch (ca->ca_type) {
616 old = ((char **)memb_ptr)[idx];
618 ((char **)memb_ptr)[idx] = str ? strdup(str) : NULL;
619 len = 65535; /* really SIZE_MAX, but that's C99 */
622 if (CANT_HAPPEN(idx))
625 return gripe("Field %d doesn't take nil", fldno + 1);
627 if (strlen(str) > len)
628 return gripe("Field %d takes at most %d characters",
629 fldno + 1, (int)len);
632 strncpy(memb_ptr, str, len);
635 return gripe("Field %d doesn't take strings", fldno + 1);
639 if (old && (!str || strncmp(old, str, len)))
640 return gripe("Value for field %d must be \"%.*s\"",
641 fldno + 1, (int)len, old);
643 return gripe("Value for field %d must be nil", fldno + 1);
650 * Resolve symbol name ID in table referred to by CA.
651 * Use field number N for error messages.
652 * Return index in referred table on success, -1 on failure.
655 xunsymbol(char *id, struct castr *ca, int n)
657 int i = ef_elt_byname(ca->ca_table, id);
659 return gripe("%s %s symbol `%s' in field %d",
660 i == M_NOTUNIQUE ? "Ambiguous" : "Unknown",
661 ca->ca_name, id, n + 1);
666 * Map symbol index to symbol value.
667 * CA is the table, and I is the index in it.
670 symval(struct castr *ca, int i)
672 int type = ca->ca_table;
674 if (type != EF_BAD && ef_cadef(type) == symbol_ca)
675 /* symbol table, value is in the table */
676 return ((struct symbol *)ef_ptr(type, i))->value;
677 /* value is the table index */
682 * Set value of field FLDNO in current object to value of symbol SYM.
683 * Return 1 on success, -1 on error.
686 setsym(int fldno, char *sym)
691 ca = getfld(fldno, NULL);
695 if (ca->ca_table == EF_BAD || (ca->ca_flags & NSC_BITS))
696 return gripe("Field %d doesn't take symbols", fldno + 1);
698 i = xunsymbol(sym, ca, fldno);
701 return setnum(fldno, symval(ca, i));
705 * Create an empty symbol set for field FLDNO in *SET.
706 * Return 1 on success, -1 on error.
709 mtsymset(int fldno, long *set)
713 ca = getfld(fldno, NULL);
717 if (ca->ca_table == EF_BAD || ef_cadef(ca->ca_table) != symbol_ca
718 || !(ca->ca_flags & NSC_BITS))
719 return gripe("Field %d doesn't take symbol sets", fldno + 1);
725 * Add a symbol to a symbol set for field FLDNO in *SET.
726 * SYM is the name of the symbol to add.
727 * Return 1 on success, -1 on error.
730 add2symset(int fldno, long *set, char *sym)
735 ca = getfld(fldno, NULL);
739 i = xunsymbol(sym, ca, fldno);
742 *set |= symval(ca, i);
747 * Read an xdump table header line from FP.
748 * Expect header for EXPECTED_TABLE, unless it is EF_BAD.
749 * Recognize header for machine- and human-readable syntax, and set
751 * Return table type on success, -2 on EOF before header, -1 on failure.
754 xuheader(FILE *fp, int expected_table)
760 while ((ch = skipfs(fp)) == '\n')
762 if (ch == EOF && expected_table == EF_BAD)
769 ? fscanf(fp, "config%*[ \t]%63[^ \t#\n]%n", name, &res) != 1
770 : fscanf(fp, "XDUMP%*[ \t]%63[^ \t#\n]%*[ \t]%*[^ \t#\n]%n",
771 name, &res) != 1) || res < 0)
772 return gripe("Expected xdump header");
774 type = ef_byname(name);
776 return gripe("Unknown table `%s'", name);
777 if (expected_table != EF_BAD && expected_table != type)
778 return gripe("Expected table `%s', not `%s'",
779 ef_nameof(expected_table), name);
781 if (!ef_cadef(type) || !(ef_flags(type) & EFF_MEM)) {
782 CANT_HAPPEN(expected_table != EF_BAD);
783 return gripe("Table `%s' is not permitted here", name);
786 if (skipfs(fp) != '\n')
787 return gripe("Junk after xdump header");
794 * Find fields in this xdump.
795 * If reading human-readable syntax, read a field header line from FP.
796 * Else take fields from the table's selectors in CA[].
797 * Set ellipsis, nflds, fldca[], fldidx[] and caflds[] accordingly.
798 * Return 0 on success, -1 on failure.
801 xufldhdr(FILE *fp, struct castr ca[])
807 for (i = 0; ca[i].ca_name; i++)
812 while ((ch = skipfs(fp)) == '\n')
815 nflds = xuflds(fp, xufldname);
818 nflds -= ellipsis != 0;
823 for (i = 0; ca[i].ca_name; i++) {
824 if ((ca[i].ca_flags & NSC_EXTRA))
826 n = ca[i].ca_type != NSC_STRINGY ? ca[i].ca_len : 0;
834 nflds = fidx - fldidx;
841 * Read xdump footer from FP.
842 * CA[] contains the table's selectors.
843 * The body had RECS records.
844 * Update cafldspp[] from caflds[].
845 * Return 0 on success, -1 on failure.
848 xufooter(FILE *fp, struct castr ca[], int recs)
854 if (fscanf(fp, "config%n", &res) != 0 || res < 0)
855 return gripe("Malformed table footer");
857 if (fscanf(fp, "%d", &n) != 1)
858 return gripe("Malformed table footer");
860 return gripe("Read %d rows, which doesn't match footer "
863 if (skipfs(fp) != '\n')
864 return gripe("Junk after table footer");
867 for (i = 0; ca[i].ca_name; i++) {
868 if (cafldspp[i] < caflds[i])
869 cafldspp[i] = caflds[i];
876 * Read an xdump table from FP.
877 * Both machine- and human-readable xdump syntax are recognized.
878 * Expect table EXPECTED_TABLE, unless it is EF_BAD.
879 * Report errors to stderr.
880 * Messages assume FP starts in the file FILE at line *PLNO.
881 * Update *PLNO to reflect lines read from FP.
882 * Return table type on success, -2 on EOF before header, -1 on failure.
885 xundump(FILE *fp, char *file, int *plno, int expected_table)
888 int type, nca, nf, i, ch;
893 if ((type = xuheader(fp, expected_table)) < 0)
897 if (CANT_HAPPEN(!ca))
901 for (i = 0; ca[i].ca_name; i++) {
903 if (!(ca[i].ca_flags & NSC_EXTRA))
904 nf += MAX(1, ca[i].ca_type != NSC_STRINGY ? ca[i].ca_len : 0);
906 fldca = malloc(nf * sizeof(*fldca));
907 fldidx = malloc(nf * sizeof(*fldidx));
908 caflds = malloc(nca * sizeof(*caflds));
909 cafldspp = calloc(nca, sizeof(*cafldspp));
912 if (xutail(fp, ca) < 0)
920 /* Skip empty lines so that callers can easily check for EOF */
921 while ((ch = skipfs(fp)) == '\n')
930 * Read the remainder of an xdump after the table header line from FP.
931 * CA[] contains the table's selectors.
932 * Return 0 on success, -1 on failure.
935 xutail(FILE *fp, struct castr *ca)
941 if (xufldhdr(fp, ca) < 0)
943 if ((recs = xubody(fp)) < 0)
945 if (xufooter(fp, ca, recs) < 0)
949 if (xuheader(fp, cur_type) < 0)
955 * Read the body of an xdump table from FP.
956 * Return number of rows read on success, -1 on failure.
961 struct empfile *ep = &empfile[cur_type];
966 while ((ch = skipfs(fp)) == '\n')
973 if (xuflds(fp, xufld) < 0)
975 maxid = MAX(maxid, cur_id + 1);
978 if (CANT_HAPPEN(maxid > ep->fids))
980 if (maxid < ep->fids) {
981 if (EF_IS_GAME_STATE(cur_type)
982 || (cur_type >= EF_SHIP_CHR && cur_type <= EF_NUKE_CHR))
983 ef_truncate(cur_type, maxid);
985 return gripe("Table %s requires %d rows, got %d",
986 ef_nameof(cur_type), ep->fids, maxid);