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Diffstat (limited to 'methods')
-rw-r--r--methods/rred.cc57
1 files changed, 41 insertions, 16 deletions
diff --git a/methods/rred.cc b/methods/rred.cc
index 79ab8cb52..8573c3922 100644
--- a/methods/rred.cc
+++ b/methods/rred.cc
@@ -336,26 +336,30 @@ class Patch {
FileChanges filechanges;
MemBlock add_text;
- static bool retry_fwrite(char *b, size_t l, FileFd &f, Hashes *hash)
+ static bool retry_fwrite(char *b, size_t l, FileFd &f, Hashes * const start_hash, Hashes * const end_hash = nullptr)
{
if (f.Write(b, l) == false)
return false;
- if (hash)
- hash->Add((unsigned char*)b, l);
+ if (start_hash)
+ start_hash->Add((unsigned char*)b, l);
+ if (end_hash)
+ end_hash->Add((unsigned char*)b, l);
return true;
}
- static void dump_rest(FileFd &o, FileFd &i, Hashes *hash)
+ static void dump_rest(FileFd &o, FileFd &i,
+ Hashes * const start_hash, Hashes * const end_hash)
{
char buffer[BLOCK_SIZE];
unsigned long long l = 0;
while (i.Read(buffer, sizeof(buffer), &l)) {
- if (l ==0 || !retry_fwrite(buffer, l, o, hash))
+ if (l ==0 || !retry_fwrite(buffer, l, o, start_hash, end_hash))
break;
}
}
- static void dump_lines(FileFd &o, FileFd &i, size_t n, Hashes *hash)
+ static void dump_lines(FileFd &o, FileFd &i, size_t n,
+ Hashes * const start_hash, Hashes * const end_hash)
{
char buffer[BLOCK_SIZE];
while (n > 0) {
@@ -364,11 +368,11 @@ class Patch {
size_t const l = strlen(buffer);
if (l == 0 || buffer[l-1] == '\n')
n--;
- retry_fwrite(buffer, l, o, hash);
+ retry_fwrite(buffer, l, o, start_hash, end_hash);
}
}
- static void skip_lines(FileFd &i, int n)
+ static void skip_lines(FileFd &i, int n, Hashes * const start_hash)
{
char buffer[BLOCK_SIZE];
while (n > 0) {
@@ -377,6 +381,8 @@ class Patch {
size_t const l = strlen(buffer);
if (l == 0 || buffer[l-1] == '\n')
n--;
+ if (start_hash)
+ start_hash->Add((unsigned char*)buffer, l);
}
}
@@ -526,15 +532,16 @@ class Patch {
}
}
- void apply_against_file(FileFd &out, FileFd &in, Hashes *hash = NULL)
+ void apply_against_file(FileFd &out, FileFd &in,
+ Hashes * const start_hash = nullptr, Hashes * const end_hash = nullptr)
{
std::list<struct Change>::iterator ch;
for (ch = filechanges.begin(); ch != filechanges.end(); ++ch) {
- dump_lines(out, in, ch->offset, hash);
- skip_lines(in, ch->del_cnt);
- dump_mem(out, ch->add, ch->add_len, hash);
+ dump_lines(out, in, ch->offset, start_hash, end_hash);
+ skip_lines(in, ch->del_cnt, start_hash);
+ dump_mem(out, ch->add, ch->add_len, end_hash);
}
- dump_rest(out, in, hash);
+ dump_rest(out, in, start_hash, end_hash);
out.Flush();
}
};
@@ -582,6 +589,16 @@ class RredMethod : public aptMethod {
std::vector<PDiffFile> patchfiles;
Patch patch;
+ HashStringList StartHashes;
+ for (char const * const * type = HashString::SupportedHashes(); *type != nullptr; ++type)
+ {
+ std::string tagname;
+ strprintf(tagname, "Start-%s-Hash", *type);
+ std::string const hashsum = LookupTag(Message, tagname.c_str());
+ if (hashsum.empty() == false)
+ StartHashes.push_back(HashString(*type, hashsum));
+ }
+
if (FileExists(Path + ".ed") == true)
{
HashStringList const ExpectedHashes = ReadExpectedHashesForPatch(0, Message);
@@ -654,8 +671,16 @@ class RredMethod : public aptMethod {
return _error->Error("Failed to open out %s", Itm->DestFile.c_str());
}
- Hashes hash(Itm->ExpectedHashes);
- patch.apply_against_file(out, inp, &hash);
+ Hashes end_hash(Itm->ExpectedHashes);
+ if (StartHashes.usable())
+ {
+ Hashes start_hash(StartHashes);
+ patch.apply_against_file(out, inp, &start_hash, &end_hash);
+ if (start_hash.GetHashStringList() != StartHashes)
+ _error->Error("The input file hadn't the expected hash!");
+ }
+ else
+ patch.apply_against_file(out, inp, nullptr, &end_hash);
out.Close();
inp.Close();
@@ -686,7 +711,7 @@ class RredMethod : public aptMethod {
Res.LastModified = bufbase.st_mtime;
Res.Size = bufbase.st_size;
- Res.TakeHashes(hash);
+ Res.TakeHashes(end_hash);
URIDone(Res);
return true;