724 lines
16 KiB
C
724 lines
16 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ---
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*
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* See files README, COPYING and CREDITS in the root of the source
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* tree for related information and legal notices. It is expected
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* that future projects/authors will amend these files as needed.
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*
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* ---
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*
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* xundump.c: Load back xdump output
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*
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* Known contributors to this file:
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* Ron Koenderink, 2005
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* Markus Armbruster, 2005
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*/
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/* FIXME normalize terminology: table/rows/columns or file/records/fields */
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <string.h>
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#include <stdarg.h>
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#include <time.h>
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#include "file.h"
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#include "match.h"
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#include "nsc.h"
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#include "optlist.h"
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#include "prototypes.h"
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static char *fname;
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static int lineno;
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static int human;
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static int cur_type;
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static void *cur_obj;
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static int nflds;
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static struct castr **fldca;
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static int *fldidx;
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static int *caflds;
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static int gripe(char *, ...) ATTRIBUTE((format (printf, 1, 2)));
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static int deffld(int, char *, int);
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static int setnum(int, double);
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static int setstr(int, char *);
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static int xunsymbol1(char *, struct symbol *, struct castr *, int);
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static int setsym(int, char *);
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static int mtsymset(int, long *);
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static int add2symset(int, long *, char *);
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static struct symbol *get_symtab(struct castr *);
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static int xundump1(FILE *, int, struct castr *);
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static int
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gripe(char *fmt, ...)
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{
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va_list ap;
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fprintf(stderr, "%s:%d: ", fname, lineno);
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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putc('\n', stderr);
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return -1;
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}
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static int
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skipfs(FILE *fp)
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{
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int ch;
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do {
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ch = getc(fp);
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} while (ch == ' ' || ch == '\t');
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if (ch == '#') {
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do {
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ch = getc(fp);
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} while (ch != EOF && ch != '\n');
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}
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return ch;
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}
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static int
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getid(FILE *fp, char *buf)
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{
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int n;
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if (fscanf(fp, "%1023[^#() \t\n]%n", buf, &n) != 1 || !isalpha(buf[0]))
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return -1;
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return n;
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}
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static char *
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xuesc(char *buf)
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{
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char *src, *dst;
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int octal_chr, n;
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dst = buf;
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src = buf;
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while (*src) {
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if (*src == '\\') {
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if (sscanf(++src, "%3o%n", &octal_chr, &n) != 1 || n != 3)
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return NULL;
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*dst++ = (char)octal_chr;
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src += 3;
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} else
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*dst++ = *src++;
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}
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*dst = '\0';
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return buf;
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}
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static int
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xufldname(FILE *fp, int i)
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{
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int ch, idx;
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char buf[1024];
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ch = skipfs(fp);
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switch (ch) {
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case EOF:
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return gripe("Unexpected EOF");
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case '\n':
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if (i != nflds)
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return gripe("Header fields missing"); /* TODO which? */
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lineno++;
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return 0;
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default:
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ungetc(ch, fp);
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if (getid(fp, buf) < 0)
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return gripe("Junk in header field %d", i + 1);
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ch = getc(fp);
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if (ch != '(') {
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ungetc(ch, fp);
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return deffld(i, buf, -1);
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}
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ch = getc(fp);
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ungetc(ch, fp);
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if (isdigit(ch) || ch == '-' || ch == '+') {
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if (fscanf(fp, "%d", &idx) != 1)
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return gripe("Malformed number in index of header field %d",
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i + 1);
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if (idx < 0)
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return gripe("Index must not be negative in header field %d",
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i + 1);
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} else {
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if (getid(fp, buf) < 0)
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return gripe("Malformed index in header field %d", i + 1);
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return gripe("Symbolic index in header field %d not yet implemented",
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i + 1);
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}
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ch = getc(fp);
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if (ch != ')')
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return gripe("Malformed index in header field %d", i + 1);
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return deffld(i, buf, idx);
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}
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}
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static int
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xufld(FILE *fp, int i)
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{
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int ch;
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char buf[1024];
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double dbl;
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long set;
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ch = skipfs(fp);
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switch (ch) {
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case EOF:
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return gripe("Unexpected EOF");
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case '\n':
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if (i != nflds)
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return gripe("Field %s missing", fldca[i]->ca_name);
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lineno++;
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return 0;
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case '+': case '-': case '.':
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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ungetc(ch, fp);
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if (fscanf(fp, "%lg", &dbl) != 1)
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return gripe("Malformed number in field %d", i + 1);
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return setnum(i, dbl);
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case '"':
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ch = getc(fp);
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if (ch == '"')
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buf[0] = 0;
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else {
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ungetc(ch, fp);
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if (fscanf(fp, "%1023[^\"\n]", buf) != 1 || getc(fp) != '"')
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return gripe("Malformed string in field %d", i + 1);
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if (!xuesc(buf))
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return gripe("Invalid escape sequence in field %d",
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i + 1);
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}
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return setstr(i, buf);
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case '(':
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if (mtsymset(i, &set) < 0)
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return -1;
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for (;;) {
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ch = skipfs(fp);
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if (ch == EOF || ch == '\n')
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return gripe("Unmatched '(' in field %d", i + 1);
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if (ch == ')')
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break;
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ungetc(ch, fp);
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if (getid(fp, buf) < 0)
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return gripe("Junk in field %d", i + 1);
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if (add2symset(i, &set, buf) < 0)
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return -1;
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}
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return setnum(i, set);
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default:
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ungetc(ch, fp);
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if (getid(fp, buf) < 0)
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return gripe("Junk in field %d", i + 1);
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if (!strcmp(buf, "nil"))
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return setstr(i, NULL);
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else
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return setsym(i, buf);
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}
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}
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static int
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xuflds(FILE *fp, int (*parse)(FILE *, int))
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{
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int i, ch, res;
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for (i = 0; ; i++) {
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res = parse(fp, i);
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if (res < 0)
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return -1;
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if (res == 0)
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return i;
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ch = getc(fp);
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if (ch == '\n')
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ungetc(ch, fp);
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else if (ch != ' ' && ch != '\t')
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return gripe("Bad field separator after field %d", i + 1);
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}
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}
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static int
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deffld(int fldno, char *name, int idx)
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{
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struct castr *ca = ef_cadef(cur_type);
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int res;
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res = stmtch(name, ca, offsetof(struct castr, ca_name),
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sizeof(struct castr));
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if (res < 0)
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return gripe("Header %s of field %d is %s", name, fldno + 1,
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res == M_NOTUNIQUE ? "ambiguous" : "unknown");
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if (ca[res].ca_type != NSC_STRINGY && ca[res].ca_len != 0) {
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if (idx < 0)
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return gripe("Header %s requires an index in field %d",
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ca[res].ca_name, fldno + 1);
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if (idx >= ca[res].ca_len)
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return gripe("Header %s(%d) index out of bounds in field %d",
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ca[res].ca_name, idx, fldno + 1);
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if (idx < caflds[res])
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return gripe("Duplicate header %s(%d) in field %d",
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ca[res].ca_name, idx, fldno + 1);
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if (idx > caflds[res])
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return gripe("Expected header %s(%d) in field %d",
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ca[res].ca_name, caflds[res], fldno + 1);
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} else {
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if (idx >= 0)
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return gripe("Header %s doesn't take an index in field %d",
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ca[res].ca_name, fldno + 1);
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idx = 0;
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if (caflds[res])
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return gripe("Duplicate header %s in field %d",
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ca[res].ca_name, fldno + 1);
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}
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fldca[fldno] = &ca[res];
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fldidx[fldno] = idx;
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caflds[res]++;
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return 1;
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}
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static struct castr *
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getfld(int fldno, int *idx)
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{
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if (fldno >= nflds) {
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gripe("Too many fields, expected only %d", nflds);
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return NULL;
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}
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if (CANT_HAPPEN(fldno < 0))
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return NULL;
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if (idx)
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*idx = fldidx[fldno];
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return fldca[fldno];
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}
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static int
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setnum(int fldno, double dbl)
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{
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struct castr *ca;
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int idx;
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char *memb_ptr;
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double old;
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ca = getfld(fldno, &idx);
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if (!ca)
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return -1;
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memb_ptr = cur_obj;
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memb_ptr += ca->ca_off;
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switch (ca->ca_type) {
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case NSC_CHAR:
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case NSC_TYPEID:
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old = ((signed char *)memb_ptr)[idx];
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((signed char *)memb_ptr)[idx] = (signed char)dbl;
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break;
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case NSC_UCHAR:
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old = ((unsigned char *)memb_ptr)[idx];
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((unsigned char *)memb_ptr)[idx] = (unsigned char)dbl;
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break;
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case NSC_SHORT:
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old = ((short *)memb_ptr)[idx];
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((short *)memb_ptr)[idx] = (short)dbl;
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break;
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case NSC_USHORT:
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old = ((unsigned short *)memb_ptr)[idx];
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((unsigned short *)memb_ptr)[idx] = (unsigned short)dbl;
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break;
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case NSC_INT:
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old = ((int *)memb_ptr)[idx];
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((int *)memb_ptr)[idx] = (int)dbl;
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break;
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case NSC_LONG:
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old = ((long *)memb_ptr)[idx];
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((long *)memb_ptr)[idx] = (long)dbl;
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break;
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case NSC_XCOORD:
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old = ((coord *)memb_ptr)[idx];
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((coord *)memb_ptr)[idx] = XNORM((coord)dbl);
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break;
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case NSC_YCOORD:
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old = ((coord *)memb_ptr)[idx];
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((coord *)memb_ptr)[idx] = YNORM((coord)dbl);
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break;
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case NSC_FLOAT:
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old = ((float *)memb_ptr)[idx];
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((float *)memb_ptr)[idx] = (float)dbl;
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break;
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case NSC_DOUBLE:
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old = ((double *)memb_ptr)[idx];
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((double *)memb_ptr)[idx] = dbl;
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break;
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case NSC_TIME:
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old = ((time_t *)memb_ptr)[idx];
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((time_t *)memb_ptr)[idx] = (time_t)dbl;
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break;
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default:
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return gripe("Field %d doesn't take numbers", fldno + 1);
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}
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if ((ca->ca_flags & NSC_CONST) && old != dbl)
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return gripe("Value for field %d must be %g", fldno + 1, old);
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return 1;
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}
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static int
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setstr(int fldno, char *str)
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{
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struct castr *ca;
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int idx;
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char *memb_ptr, *old;
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ca = getfld(fldno, &idx);
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if (!ca)
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return -1;
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memb_ptr = cur_obj;
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memb_ptr += ca->ca_off;
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switch (ca->ca_type) {
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case NSC_STRING:
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old = ((char **)memb_ptr)[idx];
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if (!(ca->ca_flags & NSC_CONST))
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((char **)memb_ptr)[idx] = str ? strdup(str) : NULL;
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break;
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case NSC_STRINGY:
|
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if (CANT_HAPPEN(idx))
|
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return -1;
|
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if (!str)
|
|
return gripe("Field doesn't take nil");
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if (strlen(str) > ca->ca_len)
|
|
return gripe("Field %d takes at most %d characters",
|
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fldno + 1, ca->ca_len);
|
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old = memb_ptr;
|
|
if (!(ca->ca_flags & NSC_CONST))
|
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strncpy(memb_ptr, str, ca->ca_len);
|
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break;
|
|
default:
|
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return gripe("Field %d doesn't take strings", fldno + 1);
|
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}
|
|
|
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if (ca->ca_flags & NSC_CONST) {
|
|
if (old && (!str || strcmp(old, str)))
|
|
return gripe("Value for field %d must be \"%s\"", fldno + 1, old);
|
|
if (!old && str)
|
|
return gripe("Value for field %d must be nil", fldno + 1);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
xunsymbol1(char *id, struct symbol *symtab, struct castr *ca, int n)
|
|
{
|
|
int i = stmtch(id, symtab, offsetof(struct symbol, name),
|
|
sizeof(struct symbol));
|
|
if (i < 0)
|
|
return gripe("%s %s symbol `%s' in field %d",
|
|
i == M_NOTUNIQUE ? "Ambiguous" : "Unknown",
|
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ca->ca_name, id, n);
|
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return i;
|
|
}
|
|
|
|
static int
|
|
setsym(int fldno, char *sym)
|
|
{
|
|
struct castr *ca;
|
|
struct symbol *symtab;
|
|
int i;
|
|
|
|
ca = getfld(fldno, NULL);
|
|
if (!ca)
|
|
return -1;
|
|
|
|
symtab = get_symtab(ca);
|
|
if (!symtab || (ca->ca_flags & NSC_BITS))
|
|
return gripe("Field %d doesn't take symbols", fldno + 1);
|
|
|
|
i = xunsymbol1(sym, symtab, ca, fldno);
|
|
if (i < 0)
|
|
return -1;
|
|
return setnum(fldno, symtab[i].value);
|
|
}
|
|
|
|
static int
|
|
has_const(struct castr ca[])
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; ca[i].ca_name; i++) {
|
|
if (ca[i].ca_flags & NSC_CONST)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
mtsymset(int fldno, long *set)
|
|
{
|
|
struct castr *ca;
|
|
struct symbol *symtab;
|
|
|
|
ca = getfld(fldno, NULL);
|
|
if (!ca)
|
|
return -1;
|
|
|
|
symtab = get_symtab(ca);
|
|
if (!symtab || !(ca->ca_flags & NSC_BITS)) {
|
|
return gripe("Field %d doesn't take symbol sets", fldno + 1);
|
|
}
|
|
*set = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
add2symset(int fldno, long *set, char *sym)
|
|
{
|
|
struct castr *ca;
|
|
struct symbol *symtab;
|
|
int i;
|
|
|
|
ca = getfld(fldno, NULL);
|
|
if (!ca)
|
|
return -1;
|
|
|
|
symtab = get_symtab(ca);
|
|
i = xunsymbol1(sym, symtab, ca, fldno);
|
|
if (i < 0)
|
|
return -1;
|
|
*set |= symtab[i].value;
|
|
return 0;
|
|
}
|
|
|
|
static struct symbol *
|
|
get_symtab(struct castr *ca)
|
|
{
|
|
int symtype = ca->ca_table;
|
|
struct symbol *symtab;
|
|
|
|
if (symtype == EF_BAD || ef_cadef(symtype) != symbol_ca)
|
|
return NULL;
|
|
|
|
symtab = ef_ptr(symtype, 0);
|
|
CANT_HAPPEN(!symtab);
|
|
return symtab;
|
|
}
|
|
|
|
static int
|
|
xuheader(FILE *fp, int expected_table)
|
|
{
|
|
char name[64];
|
|
int res, ch;
|
|
int type;
|
|
|
|
while ((ch = skipfs(fp)) == '\n')
|
|
lineno++;
|
|
if (ch == EOF && expected_table == EF_BAD)
|
|
return -1;
|
|
ungetc(ch, fp);
|
|
|
|
human = ch == 'c';
|
|
res = -1;
|
|
if ((human
|
|
? fscanf(fp, "config%*[ \t]%63[^ \t#\n]%n", name, &res) != 1
|
|
: fscanf(fp, "XDUMP%*[ \t]%63[^ \t#\n]%*[ \t]%*[^ \t#\n]%n",
|
|
name, &res) != 1) || res < 0)
|
|
return gripe("Expected xdump header");
|
|
|
|
type = ef_byname(name);
|
|
if (type < 0)
|
|
return gripe("Unknown table `%s'", name);
|
|
if (expected_table != EF_BAD && expected_table != type)
|
|
return gripe("Expected table `%s', not `%s'",
|
|
ef_nameof(expected_table), name);
|
|
|
|
if (!ef_cadef(type) || !(ef_flags(type) & EFF_MEM)) {
|
|
CANT_HAPPEN(expected_table != EF_BAD);
|
|
return gripe("Undumping of table `%s' not implemented", name);
|
|
}
|
|
|
|
if (skipfs(fp) != '\n')
|
|
return gripe("Junk after xdump header");
|
|
lineno++;
|
|
|
|
return type;
|
|
}
|
|
|
|
static int
|
|
xuheader1(FILE *fp, int type, struct castr ca[])
|
|
{
|
|
struct castr **fca;
|
|
int *fidx;
|
|
int ch, i, j, n;
|
|
|
|
cur_type = type;
|
|
|
|
if (human) {
|
|
while ((ch = skipfs(fp)) == '\n')
|
|
lineno++;
|
|
ungetc(ch, fp);
|
|
if (xuflds(fp, xufldname) < 0)
|
|
return -1;
|
|
} else {
|
|
fca = fldca;
|
|
fidx = fldidx;
|
|
|
|
for (i = 0; ca[i].ca_name; i++) {
|
|
if ((ca[i].ca_flags & NSC_EXTRA))
|
|
continue;
|
|
n = ca[i].ca_type != NSC_STRINGY ? ca[i].ca_len : 0;
|
|
j = 0;
|
|
do {
|
|
*fca++ = &ca[i];
|
|
*fidx++ = j;
|
|
} while (++j < n);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
xutrailer(FILE *fp, int type, int row)
|
|
{
|
|
int rows, res;
|
|
|
|
res = -1;
|
|
if (human) {
|
|
if (fscanf(fp, "config%n", &res) != 0 || res < 0)
|
|
return gripe("Malformed table footer");
|
|
} else {
|
|
if (fscanf(fp, "%d", &rows) != 1)
|
|
return gripe("Malformed table footer");
|
|
if (row != rows)
|
|
return gripe("Read %d rows, which doesn't match footer "
|
|
"%d rows", row, rows);
|
|
}
|
|
if (skipfs(fp) != '\n')
|
|
return gripe("Junk after table footer");
|
|
lineno++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
xundump(FILE *fp, char *file, int expected_table)
|
|
{
|
|
struct castr *ca;
|
|
int type, nca, i, ch;
|
|
|
|
if (fname != file) {
|
|
fname = file;
|
|
lineno = 1;
|
|
}
|
|
|
|
if ((type = xuheader(fp, expected_table)) < 0)
|
|
return -1;
|
|
|
|
ca = ef_cadef(type);
|
|
if (CANT_HAPPEN(!ca))
|
|
return -1;
|
|
|
|
nca = nflds = 0;
|
|
for (i = 0; ca[i].ca_name; i++) {
|
|
nca++;
|
|
if (!(ca[i].ca_flags & NSC_EXTRA))
|
|
nflds += MAX(1, ca[i].ca_type != NSC_STRINGY ? ca[i].ca_len : 0);
|
|
}
|
|
fldca = calloc(nflds, sizeof(*fldca));
|
|
fldidx = calloc(nflds, sizeof(*fldidx));
|
|
caflds = calloc(nca, sizeof(*caflds));
|
|
|
|
if (xuheader1(fp, type, ca) < 0 || xundump1(fp, type, ca) < 0)
|
|
type = EF_BAD;
|
|
|
|
free(caflds);
|
|
free(fldidx);
|
|
free(fldca);
|
|
|
|
/* Skip empty lines so that callers can easily check for EOF */
|
|
while ((ch = skipfs(fp)) == '\n')
|
|
lineno++;
|
|
ungetc(ch, fp);
|
|
|
|
return type;
|
|
}
|
|
|
|
static int
|
|
xundump1(FILE *fp, int type, struct castr *ca)
|
|
{
|
|
struct empfile *ep = &empfile[type];
|
|
int fixed_rows = has_const(ca);
|
|
int need_sentinel = !EF_IS_GAME_STATE(type);
|
|
int row, ch;
|
|
|
|
cur_type = type;
|
|
|
|
for (row = 0;; ++row) {
|
|
while ((ch = skipfs(fp)) == '\n')
|
|
lineno++;
|
|
if (ch == '/')
|
|
break;
|
|
ungetc(ch, fp);
|
|
/* TODO ability to skip records */
|
|
if (!fixed_rows) {
|
|
if (row >= ep->csize - !!need_sentinel)
|
|
/* TODO grow cache unless EFF_STATIC */
|
|
return gripe("Too many rows for table %s", ef_nameof(type));
|
|
if (row >= ep->cids)
|
|
/* TODO grow file */
|
|
ep->cids = ep->fids = row + 1;
|
|
}
|
|
cur_obj = ef_ptr(type, row);
|
|
if (!cur_obj)
|
|
return gripe("Too many rows for table %s", ef_nameof(type));
|
|
if (xuflds(fp, xufld) < 0)
|
|
return -1;
|
|
}
|
|
|
|
if (row != ep->fids) {
|
|
if (fixed_rows)
|
|
return gripe("Table %s requires %d rows, got %d",
|
|
ef_nameof(type), ep->fids, row);
|
|
else {
|
|
ep->cids = ep->fids = row;
|
|
if (EF_IS_GAME_STATE(type) && row != ep->csize)
|
|
/* TODO truncate file */
|
|
gripe("Warning: should resize table %s from %d to %d, not implemented",
|
|
ef_nameof(type), ep->csize, row);
|
|
}
|
|
}
|
|
|
|
if (need_sentinel) {
|
|
if (CANT_HAPPEN(row >= ep->csize))
|
|
return gripe("No space for sentinel");
|
|
memset(ep->cache + ep->size * row, 0, ep->size);
|
|
}
|
|
|
|
if (xutrailer(fp, type, row) < 0)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|