/*
* upkg: tool for manipulating Unreal Tournament packages.
- * Copyright (C) 2009 Nick Bowler
+ * Copyright © 2009-2011 Nick Bowler
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* Stores the result in *val and returns the number of input bytes read (or 0
* if the input is invalid, in which case *val is undefined).
*/
-size_t upkg_decode_index(long *val, unsigned char *bytes, size_t n)
+size_t upkg_decode_index(long *val, const unsigned char *bytes, size_t n)
{
- size_t i = 0;
-
*val = 0;
- while (i < MIN(n, 5)) {
+
+ for (size_t i = 0; i < MIN(n, 5); i++) {
/*
* Least significant bytes are first, so we need to do this
* nonsense.
*val += tmp;
if (!(bytes[i] & (i == 0 ? 0x40 : 0x80))) {
- i++;
- break;
+ if (bytes[0] & 0x80)
+ *val = -*val;
+ return i+1;
}
-
- i++;
}
- if (i > MIN(n, 5) || n == 0)
- return 0;
- if (bytes[0] & 0x80)
- *val = -*val;
- return i;
+ /* Error */
+ return 0;
}
static struct upkg_priv *init_upkg(unsigned char hdr[static UPKG_HDR_SIZE])
while (index < pkg->pub.export_count) {
struct upkg_export_priv *export = &pkg->exports[index];
+ unsigned long parent_index;
long tmp;
/* Read some data into buffer. */
len += rc;
if (nbuf-len < 4) goto err;
- export->pub.package = unpack_s32_le(buf+len);
+ parent_index = unpack_32_le(buf+len);
len += 4;
+ export->pub.parent = NULL;
+ if (parent_index > 0) {
+ parent_index--;
+ if (parent_index >= pkg->pub.export_count)
+ goto err;
+ export->pub.parent = &pkg->exports[parent_index].pub;
+ }
+
rc = upkg_decode_index(&tmp, buf+len, nbuf-len);
if (rc == 0 || tmp < 0 || tmp >= pkg->pub.name_count) goto err;
export->pub.name = pkg->names[tmp].name;
return pkg->names[idx].name;
}
-long upkg_export_find(struct upkg *pub, long parent, const char *name)
+long upkg_export_find(struct upkg *pub, long parent_index, const char *name)
{
struct upkg_priv *pkg = (struct upkg_priv *)pub;
+ struct upkg_export *parent = NULL;
- /* This only makes sense if the assertion below is not violated. */
- long package = parent < 0 ? 0 : parent + 1;
+ if (parent_index >= 0) {
+ if (parent_index >= pkg->pub.export_count)
+ return -1;
+ parent = &pkg->exports[parent_index].pub;
+ }
for (unsigned long i = 0; i < pkg->pub.export_count; i++) {
struct upkg_export_priv *e = &pkg->exports[i];
- /* Assertion: an object's package is an export. */
- format_assert(e->pub.package >= 0, continue);
- if (e->pub.package == package
- && strcmp(e->pub.name, name) == 0) {
+ if (e->pub.parent == parent && !strcmp(e->pub.name, name))
return i;
- }
}
return -1;