This changeset adds support for autoincrements to archive. It allows it to...

This changeset adds support for autoincrements to archive. It allows it to have them with both unique and non-unique indexes. 
Test cases will come in the next push (just doing this one so I can get a couple of reviews in). This is not the final patch. 

sql/field.h

@@ -253,7 +253,15 @@ class Field
       ptr-=row_offset;
       return tmp;
     }
-
+  inline longlong val_int(char *new_ptr)
+  {
+    char *old_ptr= ptr;
+    longlong return_value;
+    ptr= new_ptr;
+    return_value= val_int();
+    ptr= old_ptr;
+    return return_value;
+  }
   inline String *val_str(String *str, char *new_ptr)
   {
     char *old_ptr= ptr;

sql/ha_archive.h

@@ -18,6 +18,7 @@
 #pragma interface			/* gcc class implementation */
 #endif
 
+#include <values.h>
 #include <zlib.h>
 #include "../storage/archive/azlib.h"
 
@@ -38,13 +39,14 @@ typedef struct st_archive_share {
   bool dirty;               /* Flag for if a flush should occur */
   bool crashed;             /* Meta file is crashed */
   ha_rows rows_recorded;    /* Number of rows in tables */
+  ulonglong auto_increment_value;
 } ARCHIVE_SHARE;
 
 /*
   Version for file format.
   1 - Initial Version
 */
-#define ARCHIVE_VERSION 1
+#define ARCHIVE_VERSION 2
 
 class ha_archive: public handler
 {
@@ -68,13 +70,22 @@ class ha_archive: public handler
   const char **bas_ext() const;
   ulong table_flags() const
   {
-    return (HA_REC_NOT_IN_SEQ | HA_NOT_EXACT_COUNT | HA_NO_AUTO_INCREMENT |
+    return (HA_REC_NOT_IN_SEQ | HA_NOT_EXACT_COUNT |
             HA_FILE_BASED | HA_CAN_INSERT_DELAYED | HA_CAN_GEOMETRY);
   }
   ulong index_flags(uint idx, uint part, bool all_parts) const
   {
-    return 0;
+    return HA_ONLY_WHOLE_INDEX;
   }
+  ulonglong get_auto_increment();
+  uint max_supported_keys()          const { return 1; }
+  uint max_supported_key_length()    const { return sizeof(ulonglong); }
+  uint max_supported_key_part_length() const { return sizeof(ulonglong); }
+  int index_init(uint keynr, bool sorted);
+  virtual int index_read(byte * buf, const byte * key,
+			 uint key_len, enum ha_rkey_function find_flag);
+  virtual int index_read_idx(byte * buf, uint index, const byte * key,
+			     uint key_len, enum ha_rkey_function find_flag);
   int open(const char *name, int mode, uint test_if_locked);
   int close(void);
   int write_row(byte * buf);
@@ -84,8 +95,9 @@ class ha_archive: public handler
   int rnd_next(byte *buf);
   int rnd_pos(byte * buf, byte *pos);
   int get_row(azio_stream *file_to_read, byte *buf);
-  int read_meta_file(File meta_file, ha_rows *rows);
-  int write_meta_file(File meta_file, ha_rows rows, bool dirty);
+  int read_meta_file(File meta_file, ha_rows *rows, ulonglong *auto_increment);
+  int write_meta_file(File meta_file, ha_rows rows, 
+                      ulonglong auto_increment, bool dirty);
   ARCHIVE_SHARE *get_share(const char *table_name, TABLE *table);
   int free_share(ARCHIVE_SHARE *share);
   bool auto_repair() const { return 1; } // For the moment we just do this