1 /* 2 * Copyright (c) 2007-2011, Novell Inc. 3 * 4 * This program is licensed under the BSD license, read LICENSE.BSD 5 * for further information 6 */ 7 8 #ifndef LIBSOLV_REPOPAGE_H 9 #define LIBSOLV_REPOPAGE_H 10 11 #define REPOPAGE_BLOBBITS 15 12 #define REPOPAGE_BLOBSIZE (1 << REPOPAGE_BLOBBITS) 13 14 typedef struct s_Attrblobpage 15 { 16 /* page_size == 0 means the page is not backed by some file storage. 17 Otherwise it is L*2+(compressed ? 1 : 0), with L being the data 18 length. */ 19 unsigned int page_offset; 20 unsigned int page_size; 21 } Attrblobpage; 22 23 typedef struct s_Repopagestore { 24 int pagefd; /* file descriptor we're paging from */ 25 long file_offset; /* pages in file start here */ 26 27 unsigned char *blob_store; 28 unsigned int num_pages; 29 30 /* mapped_at[page] == -1 --> not loaded, otherwise offset into 31 store->blob_store. The size of the mapping is REPOPAGE_BLOBSIZE 32 except for the last page. */ 33 unsigned int *mapped_at; 34 35 Attrblobpage *file_pages; 36 37 /* mapped[i] is -1 if nothing is mapped at logical page I, 38 otherwise it contains the page number (of the mapped page). */ 39 unsigned int *mapped; 40 unsigned int nmapped; 41 unsigned int rr_counter; 42 } Repopagestore; 43 44 #ifdef __cplusplus 45 extern "C" { 46 #endif 47 48 void repopagestore_init(Repopagestore *store); 49 void repopagestore_free(Repopagestore *store); 50 51 /* load pages pstart..pend into consecutive memory, return address */ 52 unsigned char *repopagestore_load_page_range(Repopagestore *store, unsigned int pstart, unsigned int pend); 53 54 /* compress a page, return compressed len */ 55 unsigned int repopagestore_compress_page(unsigned char *page, unsigned int len, unsigned char *cpage, unsigned int max); 56 57 /* setup page data for repodata_load_page_range */ 58 int repopagestore_read_or_setup_pages(Repopagestore *store, FILE *fp, unsigned int pagesz, unsigned int blobsz); 59 60 void repopagestore_disable_paging(Repopagestore *store); 61 62 #ifdef __cplusplus 63 } 64 #endif 65 66 #endif /* LIBSOLV_REPOPAGE_H */ 67