diff options
Diffstat (limited to '')
| -rw-r--r-- | external/db_drivers/liblmdb/midl.c (renamed from external/db_drivers/liblmdb64/midl.c) | 66 |
1 files changed, 63 insertions, 3 deletions
diff --git a/external/db_drivers/liblmdb64/midl.c b/external/db_drivers/liblmdb/midl.c index 16782dcaf..e2005d16c 100644 --- a/external/db_drivers/liblmdb64/midl.c +++ b/external/db_drivers/liblmdb/midl.c @@ -116,7 +116,7 @@ void mdb_midl_free(MDB_IDL ids) free(ids-1); } -int mdb_midl_shrink( MDB_IDL *idp ) +void mdb_midl_shrink( MDB_IDL *idp ) { MDB_IDL ids = *idp; if (*(--ids) > MDB_IDL_UM_MAX && @@ -124,9 +124,7 @@ int mdb_midl_shrink( MDB_IDL *idp ) { *ids++ = MDB_IDL_UM_MAX; *idp = ids; - return 1; } - return 0; } static int mdb_midl_grow( MDB_IDL *idp, int num ) @@ -356,5 +354,67 @@ int mdb_mid2l_append( MDB_ID2L ids, MDB_ID2 *id ) return 0; } +#ifdef MDB_VL32 +unsigned mdb_mid3l_search( MDB_ID3L ids, MDB_ID id ) +{ + /* + * binary search of id in ids + * if found, returns position of id + * if not found, returns first position greater than id + */ + unsigned base = 0; + unsigned cursor = 1; + int val = 0; + unsigned n = (unsigned)ids[0].mid; + + while( 0 < n ) { + unsigned pivot = n >> 1; + cursor = base + pivot + 1; + val = CMP( id, ids[cursor].mid ); + + if( val < 0 ) { + n = pivot; + + } else if ( val > 0 ) { + base = cursor; + n -= pivot + 1; + + } else { + return cursor; + } + } + + if( val > 0 ) { + ++cursor; + } + return cursor; +} + +int mdb_mid3l_insert( MDB_ID3L ids, MDB_ID3 *id ) +{ + unsigned x, i; + + x = mdb_mid3l_search( ids, id->mid ); + + if( x < 1 ) { + /* internal error */ + return -2; + } + + if ( x <= ids[0].mid && ids[x].mid == id->mid ) { + /* duplicate */ + return -1; + } + + /* insert id */ + ids[0].mid++; + for (i=(unsigned)ids[0].mid; i>x; i--) + ids[i] = ids[i-1]; + ids[x] = *id; + + return 0; +} +#endif /* MDB_VL32 */ + /** @} */ /** @} */ |