2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2008, 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, 2005-2007
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 * TODO, but hardly worth the effort:
51 * - Permit reordering of array elements
64 #include "prototypes.h"
66 static char *fname; /* Name of file being read */
67 static int lineno; /* Current line number */
68 static int human; /* Reading human-readable syntax? */
69 static int ellipsis; /* Header ended with ...? */
70 static int is_partial; /* Is input split into parts? */
71 static int cur_type; /* Current table's file type */
72 static void *cur_obj; /* The object being read into */
73 static int cur_id; /* and its index in the table */
74 static int cur_obj_is_blank;
75 static int nflds; /* #fields in input records */
76 static struct castr **fldca; /* Map field number to selector */
77 static int *fldidx; /* Map field number to index */
78 static int *caflds; /* Map selector number to #fields seen */
79 static int *cafldspp; /* ditto, in previous parts */
81 static int gripe(char *, ...) ATTRIBUTE((format (printf, 1, 2)));
82 static int deffld(int, char *, int);
83 static int defellipsis(void);
84 static int chkflds(void);
85 static int setnum(int, double);
86 static int setstr(int, char *);
87 static int xunsymbol(char *, struct castr *, int);
88 static int setsym(int, char *);
89 static int mtsymset(int, long *);
90 static int add2symset(int, long *, char *);
91 static int xubody(FILE *);
92 static int xutail(FILE *, struct castr *);
95 * Gripe about the current line to stderr, return -1.
102 fprintf(stderr, "%s:%d: ", fname, lineno);
104 vfprintf(stderr, fmt, ap);
112 * Read and ignore field separators from FP.
113 * Return first character that is not a field separator.
122 } while (ch == ' ' || ch == '\t');
127 } while (ch != EOF && ch != '\n');
134 * Read an identifier from FP into BUF.
135 * BUF must have space for 1024 characters.
136 * Return number of characters read on success, -1 on failure.
139 getid(FILE *fp, char *buf)
142 if (fscanf(fp, "%1023[^#()<>=#\" \t\n]%n", buf, &n) != 1
149 * Decode escape sequences in BUF.
150 * Return BUF on success, null pointer on failure.
162 if (sscanf(++src, "%3o%n", &octal_chr, &n) != 1 || n != 3)
164 *dst++ = (char)octal_chr;
174 * Try to read a field name from FP.
175 * I is the field number, counting from zero.
176 * If a name is read, set fldca[I] and fldidx[I] for it, and update
178 * Return 1 if a name or ... was read, 0 on end of line, -1 on error.
181 xufldname(FILE *fp, int i)
189 return gripe("Unexpected EOF");
196 if (getc(fp) != '.' || getc(fp) != '.')
197 return gripe("Junk in header field %d", i + 1);
198 if (defellipsis() < 0)
201 if (ch != EOF && ch != '\n')
202 return gripe("Junk after ...");
207 if (getid(fp, buf) < 0)
208 return gripe("Junk in header field %d", i + 1);
212 return deffld(i, buf, -1);
216 if (isdigit(ch) || ch == '-' || ch == '+') {
217 if (fscanf(fp, "%d", &idx) != 1)
218 return gripe("Malformed number in index of header field %d",
221 return gripe("Index must not be negative in header field %d",
224 if (getid(fp, buf) < 0)
225 return gripe("Malformed index in header field %d", i + 1);
226 return gripe("Symbolic index in header field %d not yet implemented",
231 return gripe("Malformed index in header field %d", i + 1);
232 return deffld(i, buf, idx);
237 * Try to read a field value from FP.
238 * I is the field number, counting from zero.
239 * Return 1 if a value was read, 0 on end of line, -1 on error.
242 xufld(FILE *fp, int i)
252 return gripe("Unexpected EOF");
254 CANT_HAPPEN(i > nflds);
256 if (fldca[i]->ca_type != NSC_STRINGY && fldca[i]->ca_len)
257 return gripe("Field %s(%d) missing",
258 fldca[i]->ca_name, fldidx[i]);
259 return gripe("Field %s missing", fldca[i]->ca_name);
263 case '+': case '-': case '.':
264 case '0': case '1': case '2': case '3': case '4':
265 case '5': case '6': case '7': case '8': case '9':
267 if (fscanf(fp, "%lg", &dbl) != 1)
268 return gripe("Malformed number in field %d", i + 1);
269 return setnum(i, dbl);
276 if (fscanf(fp, "%1023[^\"\n]", buf) != 1 || getc(fp) != '"')
277 return gripe("Malformed string in field %d", i + 1);
279 return gripe("Invalid escape sequence in field %d",
282 return setstr(i, buf);
284 if (mtsymset(i, &set) < 0)
288 if (ch == EOF || ch == '\n')
289 return gripe("Unmatched '(' in field %d", i + 1);
293 if (getid(fp, buf) < 0)
294 return gripe("Junk in field %d", i + 1);
295 if (add2symset(i, &set, buf) < 0)
298 return setnum(i, set);
301 if (getid(fp, buf) < 0)
302 return gripe("Junk in field %d", i + 1);
303 if (!strcmp(buf, "nil"))
304 return setstr(i, NULL);
306 return setsym(i, buf);
311 * Read fields from FP.
312 * Use PARSE() to read each field.
313 * Return number of fields read on success, -1 on error.
316 xuflds(FILE *fp, int (*parse)(FILE *, int))
329 else if (ch != ' ' && ch != '\t')
330 return gripe("Bad field separator after field %d", i + 1);
335 * Define the FLDNO-th field.
336 * If IDX is negative, define as selector NAME, else as NAME(IDX).
337 * Set fldca[FLDNO] and fldidx[FLDNO] accordingly.
339 * Return 1 on success, -1 on error.
342 deffld(int fldno, char *name, int idx)
344 struct castr *ca = ef_cadef(cur_type);
347 res = stmtch(name, ca, offsetof(struct castr, ca_name),
348 sizeof(struct castr));
350 return gripe("Header %s of field %d is %s", name, fldno + 1,
351 res == M_NOTUNIQUE ? "ambiguous" : "unknown");
352 if (ca[res].ca_type != NSC_STRINGY && ca[res].ca_len != 0) {
354 return gripe("Header %s requires an index in field %d",
355 ca[res].ca_name, fldno + 1);
356 if (idx >= ca[res].ca_len)
357 return gripe("Header %s(%d) index out of bounds in field %d",
358 ca[res].ca_name, idx, fldno + 1);
359 if (idx < caflds[res])
360 return gripe("Duplicate header %s(%d) in field %d",
361 ca[res].ca_name, idx, fldno + 1);
362 if (idx > caflds[res])
363 return gripe("Expected header %s(%d) in field %d",
364 ca[res].ca_name, caflds[res], fldno + 1);
367 return gripe("Header %s doesn't take an index in field %d",
368 ca[res].ca_name, fldno + 1);
371 return gripe("Duplicate header %s in field %d",
372 ca[res].ca_name, fldno + 1);
374 fldca[fldno] = &ca[res];
381 * Record that header ends with ...
382 * Set ellipsis and is_partial.
383 * Return 0 on success, -1 on error.
388 struct castr *ca = ef_cadef(cur_type);
390 if (ca[0].ca_table != cur_type)
391 return gripe("Table %s doesn't support ...", ef_nameof(cur_type));
392 ellipsis = is_partial = 1;
397 * Check fields in xdump are sane.
398 * Return 0 on success, -1 on error.
403 struct castr *ca = ef_cadef(cur_type);
404 int i, len, cafldsmax, res = 0;
407 /* Need a join field, use 0-th selector */
409 return gripe("Header field %s required with ...", ca[0].ca_name);
415 for (i = 0; ca[i].ca_name; i++) {
416 cafldsmax = MAX(caflds[i], cafldspp[i]);
417 if (ca[i].ca_flags & NSC_EXTRA)
419 len = ca[i].ca_type != NSC_STRINGY ? ca[i].ca_len : 0;
420 if (!len && !cafldsmax)
421 res = gripe("Header field %s missing", ca[i].ca_name);
422 else if (len && cafldsmax == len - 1)
423 res = gripe("Header field %s(%d) missing",
424 ca[i].ca_name, len - 1);
425 else if (len && cafldsmax < len - 1)
426 res = gripe("Header fields %s(%d) ... %s(%d) missing",
427 ca[i].ca_name, cafldsmax, ca[i].ca_name, len - 1);
434 * Get selector for field FLDNO.
435 * Assign the field's selector index to *IDX, unless it is null.
436 * Return the selector on success, null pointer on error.
438 static struct castr *
439 getfld(int fldno, int *idx)
441 if (fldno >= nflds) {
442 gripe("Too many fields, expected only %d", nflds);
445 if (CANT_HAPPEN(fldno < 0))
448 *idx = fldidx[fldno];
453 * Is a new value for field FLDNO required to match the old one?
456 fldval_must_match(int fldno)
458 struct castr *ca = ef_cadef(cur_type);
459 int i = fldca[fldno] - ca;
462 * Value must match if:
463 * it's for a const selector, unless the object is still blank, or
464 * it was already given in a previous part of a split table.
466 return (!cur_obj_is_blank && (fldca[fldno]->ca_flags & NSC_CONST))
467 || fldidx[fldno] < cafldspp[i];
471 * Get the current object.
472 * Store it in cur_obj, and set cur_obj_is_blank accordingly.
473 * Return cur_obj, which is null on error.
478 struct empfile *ep = &empfile[cur_type];
479 int need_sentinel = !EF_IS_GAME_STATE(cur_type);
482 cur_obj_is_blank = cur_id >= ep->fids;
483 if (cur_obj_is_blank) {
484 /* TODO grow cache (and possibly file) unless EFF_STATIC */
485 if (cur_id < ep->csize - !!need_sentinel)
486 ep->cids = ep->fids = cur_id + 1;
487 /* else: ef_ptr() will fail */
489 cur_obj = ef_ptr(cur_type, cur_id);
491 gripe("Can't put ID %d into table %s, it holds only 0..%d.",
492 cur_id, ep->name, ep->fids - 1);
499 * Set value of field FLDNO in current object to DBL.
500 * Return 1 on success, -1 on error.
503 setnum(int fldno, double dbl)
510 ca = getfld(fldno, &idx);
515 * If this is the record index, put it into cur_id.
517 if (fldno == 0 && ca->ca_table == cur_type)
523 memb_ptr += ca->ca_off;
525 /* FIXME check assignment preserves value */
526 switch (ca->ca_type) {
528 old = ((signed char *)memb_ptr)[idx];
529 ((signed char *)memb_ptr)[idx] = (signed char)dbl;
533 old = ((unsigned char *)memb_ptr)[idx];
534 ((unsigned char *)memb_ptr)[idx] = (unsigned char)dbl;
537 old = ((short *)memb_ptr)[idx];
538 ((short *)memb_ptr)[idx] = (short)dbl;
541 old = ((unsigned short *)memb_ptr)[idx];
542 ((unsigned short *)memb_ptr)[idx] = (unsigned short)dbl;
545 old = ((int *)memb_ptr)[idx];
546 ((int *)memb_ptr)[idx] = (int)dbl;
549 old = ((long *)memb_ptr)[idx];
550 ((long *)memb_ptr)[idx] = (long)dbl;
553 old = ((coord *)memb_ptr)[idx];
554 /* FIXME use variant of xrel() that takes orig instead of nation */
555 if (old >= WORLD_X / 2)
557 ((coord *)memb_ptr)[idx] = XNORM((coord)dbl);
560 old = ((coord *)memb_ptr)[idx];
561 /* FIXME use variant of yrel() that takes orig instead of nation */
562 if (old >= WORLD_Y / 2)
564 ((coord *)memb_ptr)[idx] = YNORM((coord)dbl);
567 old = ((float *)memb_ptr)[idx];
568 ((float *)memb_ptr)[idx] = (float)dbl;
571 old = ((double *)memb_ptr)[idx];
572 ((double *)memb_ptr)[idx] = dbl;
575 old = ((time_t *)memb_ptr)[idx];
576 ((time_t *)memb_ptr)[idx] = (time_t)dbl;
579 return gripe("Field %d doesn't take numbers", fldno + 1);
582 if (fldval_must_match(fldno) && old != dbl)
583 return gripe("Value for field %d must be %g", fldno + 1, old);
589 * Set value of field FLDNO in current object to STR.
590 * Return 1 on success, -1 on error.
593 setstr(int fldno, char *str)
598 char *memb_ptr, *old;
600 ca = getfld(fldno, &idx);
607 memb_ptr += ca->ca_off;
608 must_match = fldval_must_match(fldno);
610 switch (ca->ca_type) {
612 old = ((char **)memb_ptr)[idx];
614 ((char **)memb_ptr)[idx] = str ? strdup(str) : NULL;
615 len = 65535; /* really SIZE_MAX, but that's C99 */
618 if (CANT_HAPPEN(idx))
621 return gripe("Field %d doesn't take nil", fldno + 1);
623 if (strlen(str) > len)
624 return gripe("Field %d takes at most %d characters",
625 fldno + 1, (int)len);
628 strncpy(memb_ptr, str, len);
631 return gripe("Field %d doesn't take strings", fldno + 1);
635 if (old && (!str || strncmp(old, str, len)))
636 return gripe("Value for field %d must be \"%.*s\"",
637 fldno + 1, (int)len, old);
639 return gripe("Value for field %d must be nil", fldno + 1);
646 * Resolve symbol name ID in table referred to by CA.
647 * Use field number N for error messages.
648 * Return index in referred table on success, -1 on failure.
651 xunsymbol(char *id, struct castr *ca, int n)
653 int i = ef_elt_byname(ca->ca_table, id);
655 return gripe("%s %s symbol `%s' in field %d",
656 i == M_NOTUNIQUE ? "Ambiguous" : "Unknown",
657 ca->ca_name, id, n + 1);
662 * Map symbol index to symbol value.
663 * CA is the table, and I is the index in it.
666 symval(struct castr *ca, int i)
668 int type = ca->ca_table;
670 if (ef_check(type) < 0)
672 if (ef_cadef(type) == symbol_ca)
673 /* symbol table, value is in the table */
674 return ((struct symbol *)ef_ptr(type, i))->value;
675 /* value is the table index */
680 * Set value of field FLDNO in current object to value of symbol SYM.
681 * Return 1 on success, -1 on error.
684 setsym(int fldno, char *sym)
689 ca = getfld(fldno, NULL);
693 if (ca->ca_table == EF_BAD || (ca->ca_flags & NSC_BITS))
694 return gripe("Field %d doesn't take symbols", fldno + 1);
696 i = xunsymbol(sym, ca, fldno);
699 return setnum(fldno, symval(ca, i));
703 * Create an empty symbol set for field FLDNO in *SET.
704 * Return 1 on success, -1 on error.
707 mtsymset(int fldno, long *set)
711 ca = getfld(fldno, NULL);
715 if (ca->ca_table == EF_BAD || ef_cadef(ca->ca_table) != symbol_ca
716 || !(ca->ca_flags & NSC_BITS))
717 return gripe("Field %d doesn't take symbol sets", fldno + 1);
723 * Add a symbol to a symbol set for field FLDNO in *SET.
724 * SYM is the name of the symbol to add.
725 * Return 1 on success, -1 on error.
728 add2symset(int fldno, long *set, char *sym)
733 ca = getfld(fldno, NULL);
737 i = xunsymbol(sym, ca, fldno);
740 *set |= symval(ca, i);
745 * Read an xdump table header line from FP.
746 * Expect header for EXPECTED_TABLE, unless it is EF_BAD.
747 * Recognize header for machine- and human-readable syntax, and set
749 * Return table type on success, -2 on EOF before header, -1 on failure.
752 xuheader(FILE *fp, int expected_table)
758 while ((ch = skipfs(fp)) == '\n')
760 if (ch == EOF && expected_table == EF_BAD)
767 ? fscanf(fp, "config%*[ \t]%63[^ \t#\n]%n", name, &res) != 1
768 : fscanf(fp, "XDUMP%*[ \t]%63[^ \t#\n]%*[ \t]%*[^ \t#\n]%n",
769 name, &res) != 1) || res < 0)
770 return gripe("Expected xdump header");
772 type = ef_byname(name);
774 return gripe("Unknown table `%s'", name);
775 if (expected_table != EF_BAD && expected_table != type)
776 return gripe("Expected table `%s', not `%s'",
777 ef_nameof(expected_table), name);
779 if (!ef_cadef(type) || !(ef_flags(type) & EFF_MEM)) {
780 CANT_HAPPEN(expected_table != EF_BAD);
781 return gripe("Table `%s' is not permitted here", name);
784 if (skipfs(fp) != '\n')
785 return gripe("Junk after xdump header");
792 * Find fields in this xdump.
793 * If reading human-readable syntax, read a field header line from FP.
794 * Else take fields from the table's selectors in CA[].
795 * Set ellipsis, nflds, fldca[], fldidx[] and caflds[] accordingly.
796 * Return 0 on success, -1 on failure.
799 xufldhdr(FILE *fp, struct castr ca[])
805 for (i = 0; ca[i].ca_name; i++)
810 while ((ch = skipfs(fp)) == '\n')
813 nflds = xuflds(fp, xufldname);
816 nflds -= ellipsis != 0;
821 for (i = 0; ca[i].ca_name; i++) {
822 if ((ca[i].ca_flags & NSC_EXTRA))
824 n = ca[i].ca_type != NSC_STRINGY ? ca[i].ca_len : 0;
832 nflds = fidx - fldidx;
839 * Read xdump footer from FP.
840 * CA[] contains the table's selectors.
841 * The body had RECS records.
842 * Update cafldspp[] from caflds[].
843 * Return 0 on success, -1 on failure.
846 xufooter(FILE *fp, struct castr ca[], int recs)
852 if (fscanf(fp, "config%n", &res) != 0 || res < 0)
853 return gripe("Malformed table footer");
855 if (fscanf(fp, "%d", &n) != 1)
856 return gripe("Malformed table footer");
858 return gripe("Read %d rows, which doesn't match footer "
861 if (skipfs(fp) != '\n')
862 return gripe("Junk after table footer");
865 for (i = 0; ca[i].ca_name; i++) {
866 if (cafldspp[i] < caflds[i])
867 cafldspp[i] = caflds[i];
874 * Read an xdump table from FP.
875 * Both machine- and human-readable xdump syntax are recognized.
876 * Expect table EXPECTED_TABLE, unless it is EF_BAD.
877 * Report errors to stderr.
878 * Messages assume FP starts in the file FILE at line *PLNO.
879 * Update *PLNO to reflect lines read from FP.
880 * Return table type on success, -2 on EOF before header, -1 on failure.
883 xundump(FILE *fp, char *file, int *plno, int expected_table)
886 int type, nca, nf, i, ch;
891 if ((type = xuheader(fp, expected_table)) < 0)
895 if (CANT_HAPPEN(!ca))
899 for (i = 0; ca[i].ca_name; i++) {
901 if (!(ca[i].ca_flags & NSC_EXTRA))
902 nf += MAX(1, ca[i].ca_type != NSC_STRINGY ? ca[i].ca_len : 0);
904 fldca = malloc(nf * sizeof(*fldca));
905 fldidx = malloc(nf * sizeof(*fldidx));
906 caflds = malloc(nca * sizeof(*caflds));
907 cafldspp = calloc(nca, sizeof(*cafldspp));
910 if (xutail(fp, ca) < 0)
918 /* Skip empty lines so that callers can easily check for EOF */
919 while ((ch = skipfs(fp)) == '\n')
928 * Read the remainder of an xdump after the table header line from FP.
929 * CA[] contains the table's selectors.
930 * Return 0 on success, -1 on failure.
933 xutail(FILE *fp, struct castr *ca)
939 if (xufldhdr(fp, ca) < 0)
941 if ((recs = xubody(fp)) < 0)
943 if (xufooter(fp, ca, recs) < 0)
947 if (xuheader(fp, cur_type) < 0)
953 * Read the body of an xdump table from FP.
954 * Return number of rows read on success, -1 on failure.
959 struct empfile *ep = &empfile[cur_type];
960 int need_sentinel = !EF_IS_GAME_STATE(cur_type);
965 while ((ch = skipfs(fp)) == '\n')
972 if (xuflds(fp, xufld) < 0)
974 maxid = MAX(maxid, cur_id + 1);
977 if (CANT_HAPPEN(maxid > ep->fids))
979 if (maxid < ep->fids) {
980 if (EF_IS_GAME_STATE(cur_type) && maxid != ep->csize)
981 /* TODO truncate file */
982 gripe("Warning: should resize table %s from %d to %d, not implemented",
983 ef_nameof(cur_type), ep->csize, maxid);
984 else if (cur_type >= EF_SHIP_CHR && cur_type <= EF_NUKE_CHR)
985 ep->cids = ep->fids = maxid;
987 return gripe("Table %s requires %d rows, got %d",
988 ef_nameof(cur_type), ep->fids, maxid);
992 if (CANT_HAPPEN(maxid >= ep->csize))
993 return gripe("No space for sentinel");
994 memset(ep->cache + ep->size * maxid, 0, ep->size);