Imported Upstream version 0.7.15

[platform/upstream/libsolv.git] / src / repopage.h

diff --git a/src/repopage.h b/src/repopage.h
index 675b779..b5f2eee 100644 (file)
--- a/src/repopage.h
+++ b/src/repopage.h
@@ -1,18 +1,66 @@
 /*
- * Copyright (c) 2007-2008, Novell Inc.
+ * Copyright (c) 2007-2011, Novell Inc.
  *
  * This program is licensed under the BSD license, read LICENSE.BSD
  * for further information
  */
 
-#define BLOB_PAGEBITS 15
-#define BLOB_PAGESIZE (1 << BLOB_PAGEBITS)
+#ifndef LIBSOLV_REPOPAGE_H
+#define LIBSOLV_REPOPAGE_H
+
+#define REPOPAGE_BLOBBITS 15
+#define REPOPAGE_BLOBSIZE (1 << REPOPAGE_BLOBBITS)
+
+typedef struct s_Attrblobpage
+{
+  /* page_size == 0 means the page is not backed by some file storage.
+     Otherwise it is L*2+(compressed ? 1 : 0), with L being the data
+     length.  */
+  unsigned int page_offset;
+  unsigned int page_size;
+} Attrblobpage;
+
+typedef struct s_Repopagestore {
+  int pagefd;          /* file descriptor we're paging from */
+  long file_offset;    /* pages in file start here */
+
+  unsigned char *blob_store;
+  unsigned int num_pages;
+
+  /* mapped_at[page] == -1  --> not loaded, otherwise offset into
+     store->blob_store.  The size of the mapping is REPOPAGE_BLOBSIZE
+     except for the last page.  */
+  unsigned int *mapped_at;
+
+  Attrblobpage *file_pages;
+
+  /* mapped[i] is -1 if nothing is mapped at logical page I,
+   otherwise it contains the page number (of the mapped page).  */
+  unsigned int *mapped;
+  unsigned int nmapped;
+  unsigned int rr_counter;
+} Repopagestore;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void repopagestore_init(Repopagestore *store);
+void repopagestore_free(Repopagestore *store);
 
 /* load pages pstart..pend into consecutive memory, return address */
-unsigned char *repodata_load_page_range(Repodata *data, unsigned int pstart, unsigned int pend);
+unsigned char *repopagestore_load_page_range(Repopagestore *store, unsigned int pstart, unsigned int pend);
 
 /* compress a page, return compressed len */
-unsigned int repodata_compress_page(unsigned char *page, unsigned int len, unsigned char *cpage, unsigned int max);
+unsigned int repopagestore_compress_page(unsigned char *page, unsigned int len, unsigned char *cpage, unsigned int max);
 
 /* setup page data for repodata_load_page_range */
-void repodata_read_or_setup_pages(Repodata *data, unsigned int pagesz, unsigned int blobsz);
+int repopagestore_read_or_setup_pages(Repopagestore *store, FILE *fp, unsigned int pagesz, unsigned int blobsz);
+
+void repopagestore_disable_paging(Repopagestore *store);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LIBSOLV_REPOPAGE_H */