apt-pkg/contrib/cdromutl.{cc,h}: add FindMountPointForDevice helper; apt-pkg/cdrom...

[apt.git] / methods / rred.cc

diff --git a/methods/rred.cc b/methods/rred.cc
index f42c7a072cd280ff137dc0705c8143b4b85bc0d4..1a18a381c803351dd46d56f846a4b8e0277fb794 100644 (file)
--- a/methods/rred.cc
+++ b/methods/rred.cc
@@ -12,6 +12,7 @@
 #include <utime.h>
 #include <stdio.h>
 #include <errno.h>
+#include <zlib.h>
 #include <apti18n.h>
                                                                                /*}}}*/
 /** \brief RredMethod - ed-style incremential patch method                     {{{
@@ -33,11 +34,14 @@ class RredMethod : public pkgAcqMethod {
        // return values
        enum State {ED_OK, ED_ORDERING, ED_PARSER, ED_FAILURE, MMAP_FAILED};
 
-       State applyFile(FILE *ed_cmds, FILE *in_file, FILE *out_file,
+       State applyFile(gzFile &ed_cmds, FILE *in_file, FILE *out_file,
                     unsigned long &line, char *buffer, Hashes *hash) const;
        void ignoreLineInFile(FILE *fin, char *buffer) const;
+       void ignoreLineInFile(gzFile &fin, char *buffer) const;
        void copyLinesFromFileToFile(FILE *fin, FILE *fout, unsigned int lines,
                                    Hashes *hash, char *buffer) const;
+       void copyLinesFromFileToFile(gzFile &fin, FILE *fout, unsigned int lines,
+                                   Hashes *hash, char *buffer) const;
 
        State patchFile(FileFd &Patch, FileFd &From, FileFd &out_file, Hashes *hash) const;
        State patchMMap(FileFd &Patch, FileFd &From, FileFd &out_file, Hashes *hash) const;
@@ -65,10 +69,10 @@ public:
  *  \param hash the created file for correctness
  *  \return the success State of the ed command executor
  */
-RredMethod::State RredMethod::applyFile(FILE *ed_cmds, FILE *in_file, FILE *out_file,
+RredMethod::State RredMethod::applyFile(gzFile &ed_cmds, FILE *in_file, FILE *out_file,
                        unsigned long &line, char *buffer, Hashes *hash) const {
        // get the current command and parse it
-       if (fgets(buffer, BUF_SIZE, ed_cmds) == NULL) {
+       if (gzgets(ed_cmds, buffer, BUF_SIZE) == NULL) {
                if (Debug == true)
                        std::clog << "rred: encounter end of file - we can start patching now." << std::endl;
                line = 0;
@@ -123,7 +127,7 @@ RredMethod::State RredMethod::applyFile(FILE *ed_cmds, FILE *in_file, FILE *out_
        unsigned char mode = *idx;
 
        // save the current position
-       unsigned const long pos = ftell(ed_cmds);
+       unsigned const long pos = gztell(ed_cmds);
 
        // if this is add or change then go to the next full stop
        unsigned int data_length = 0;
@@ -157,7 +161,7 @@ RredMethod::State RredMethod::applyFile(FILE *ed_cmds, FILE *in_file, FILE *out_
 
        // include data from ed script
        if (mode == MODE_CHANGED || mode == MODE_ADDED) {
-               fseek(ed_cmds, pos, SEEK_SET);
+               gzseek(ed_cmds, pos, SEEK_SET);
                copyLinesFromFileToFile(ed_cmds, out_file, data_length, hash, buffer);
        }
 
@@ -183,6 +187,18 @@ void RredMethod::copyLinesFromFileToFile(FILE *fin, FILE *fout, unsigned int lin
        }
 }
                                                                                /*}}}*/
+void RredMethod::copyLinesFromFileToFile(gzFile &fin, FILE *fout, unsigned int lines,/*{{{*/
+                                       Hashes *hash, char *buffer) const {
+       while (0 < lines--) {
+               do {
+                       gzgets(fin, buffer, BUF_SIZE);
+                       size_t const written = fwrite(buffer, 1, strlen(buffer), fout);
+                       hash->Add((unsigned char*)buffer, written);
+               } while (strlen(buffer) == (BUF_SIZE - 1) &&
+                      buffer[BUF_SIZE - 2] != '\n');
+       }
+}
+                                                                               /*}}}*/
 void RredMethod::ignoreLineInFile(FILE *fin, char *buffer) const {             /*{{{*/
        fgets(buffer, BUF_SIZE, fin);
        while (strlen(buffer) == (BUF_SIZE - 1) &&
@@ -192,11 +208,20 @@ void RredMethod::ignoreLineInFile(FILE *fin, char *buffer) const {                /*{{{*/
        }
 }
                                                                                /*}}}*/
+void RredMethod::ignoreLineInFile(gzFile &fin, char *buffer) const {           /*{{{*/
+       gzgets(fin, buffer, BUF_SIZE);
+       while (strlen(buffer) == (BUF_SIZE - 1) &&
+              buffer[BUF_SIZE - 2] != '\n') {
+               gzgets(fin, buffer, BUF_SIZE);
+               buffer[0] = ' ';
+       }
+}
+                                                                               /*}}}*/
 RredMethod::State RredMethod::patchFile(FileFd &Patch, FileFd &From,           /*{{{*/
                                        FileFd &out_file, Hashes *hash) const {
    char buffer[BUF_SIZE];
    FILE* fFrom = fdopen(From.Fd(), "r");
-   FILE* fPatch = fdopen(Patch.Fd(), "r");
+   gzFile fPatch = Patch.gzFd();
    FILE* fTo = fdopen(out_file.Fd(), "w");
 
    /* we do a tail recursion to read the commands in the right order */
@@ -228,6 +253,12 @@ RredMethod::State RredMethod::patchMMap(FileFd &Patch, FileFd &From,               /*{{{*/
                                        FileFd &out_file, Hashes *hash) const {
 #ifdef _POSIX_MAPPED_FILES
        MMap ed_cmds(Patch, MMap::ReadOnly);
+       if (Patch.gzFd() != NULL) {
+               unsigned long mapSize = Patch.Size();
+               DynamicMMap dyn(0, mapSize, 0);
+               gzread(Patch.gzFd(), dyn.Data(), mapSize);
+               ed_cmds = dyn;
+       }
        MMap in_file(From, MMap::ReadOnly);
 
        if (ed_cmds.Size() == 0 || in_file.Size() == 0)
@@ -445,8 +476,8 @@ bool RredMethod::Fetch(FetchItem *Itm)                                              /*{{{*/
    // Open the source and destination files (the d'tor of FileFd will do 
    // the cleanup/closing of the fds)
    FileFd From(Path,FileFd::ReadOnly);
-   FileFd Patch(Path+".ed",FileFd::ReadOnly);
-   FileFd To(Itm->DestFile,FileFd::WriteEmpty);   
+   FileFd Patch(Path+".ed",FileFd::ReadOnlyGzip);
+   FileFd To(Itm->DestFile,FileFd::WriteAtomic);   
    To.EraseOnFailure();
    if (_error->PendingError() == true)
       return false;
@@ -456,9 +487,9 @@ bool RredMethod::Fetch(FetchItem *Itm)                                              /*{{{*/
    State const result = patchMMap(Patch, From, To, &Hash);
    if (result == MMAP_FAILED) {
       // retry with patchFile
-      lseek(Patch.Fd(), 0, SEEK_SET);
-      lseek(From.Fd(), 0, SEEK_SET);
-      To.Open(Itm->DestFile,FileFd::WriteEmpty);
+      Patch.Seek(0);
+      From.Seek(0);
+      To.Open(Itm->DestFile,FileFd::WriteAtomic);
       if (_error->PendingError() == true)
          return false;
       if (patchFile(Patch, From, To, &Hash) != ED_OK) {