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Code Activity

WL#3817: Simplify string / memory area types and make things more consistent (first part)

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The following type conversions was done:

- Changed byte to uchar
- Changed gptr to uchar*
- Change my_string to char *
- Change my_size_t to size_t
- Change size_s to size_t

Removed declaration of byte, gptr, my_string, my_size_t and size_s. 

Following function parameter changes was done:
- All string functions in mysys/strings was changed to use size_t
  instead of uint for string lengths.
- All read()/write() functions changed to use size_t (including vio).
- All protocoll functions changed to use size_t instead of uint
- Functions that used a pointer to a string length was changed to use size_t*
- Changed malloc(), free() and related functions from using gptr to use void *
  as this requires fewer casts in the code and is more in line with how the
  standard functions work.
- Added extra length argument to dirname_part() to return the length of the
  created string.
- Changed (at least) following functions to take uchar* as argument:
  - db_dump()
  - my_net_write()
  - net_write_command()
  - net_store_data()
  - DBUG_DUMP()
  - decimal2bin() & bin2decimal()
- Changed my_compress() and my_uncompress() to use size_t. Changed one
  argument to my_uncompress() from a pointer to a value as we only return
  one value (makes function easier to use).
- Changed type of 'pack_data' argument to packfrm() to avoid casts.
- Changed in readfrm() and writefrom(), ha_discover and handler::discover()
  the type for argument 'frmdata' to uchar** to avoid casts.
- Changed most Field functions to use uchar* instead of char* (reduced a lot of
  casts).
- Changed field->val_xxx(xxx, new_ptr) to take const pointers.

Other changes:
- Removed a lot of not needed casts
- Added a few new cast required by other changes
- Added some cast to my_multi_malloc() arguments for safety (as string lengths
  needs to be uint, not size_t).
- Fixed all calls to hash-get-key functions to use size_t*. (Needed to be done
  explicitely as this conflict was often hided by casting the function to
  hash_get_key).
- Changed some buffers to memory regions to uchar* to avoid casts.
- Changed some string lengths from uint to size_t.
- Changed field->ptr to be uchar* instead of char*. This allowed us to
  get rid of a lot of casts.
- Some changes from true -> TRUE, false -> FALSE, unsigned char -> uchar
- Include zlib.h in some files as we needed declaration of crc32()
- Changed MY_FILE_ERROR to be (size_t) -1.
- Changed many variables to hold the result of my_read() / my_write() to be
  size_t. This was needed to properly detect errors (which are
  returned as (size_t) -1).
- Removed some very old VMS code
- Changed packfrm()/unpackfrm() to not be depending on uint size
  (portability fix)
- Removed windows specific code to restore cursor position as this
  causes slowdown on windows and we should not mix read() and pread()
  calls anyway as this is not thread safe. Updated function comment to
  reflect this. Changed function that depended on original behavior of
  my_pwrite() to itself restore the cursor position (one such case).
- Added some missing checking of return value of malloc().
- Changed definition of MOD_PAD_CHAR_TO_FULL_LENGTH to avoid 'long' overflow.
- Changed type of table_def::m_size from my_size_t to ulong to reflect that
  m_size is the number of elements in the array, not a string/memory
  length.
- Moved THD::max_row_length() to table.cc (as it's not depending on THD).
  Inlined max_row_length_blob() into this function.
- More function comments
- Fixed some compiler warnings when compiled without partitions.
- Removed setting of LEX_STRING() arguments in declaration (portability fix).
- Some trivial indentation/variable name changes.
- Some trivial code simplifications:
  - Replaced some calls to alloc_root + memcpy to use
    strmake_root()/strdup_root().
  - Changed some calls from memdup() to strmake() (Safety fix)
  - Simpler loops in client-simple.c
This commit is contained in:
monty@mysql.com/narttu.mysql.fi
2007-05-10 12:59:39 +03:00
parent 9078e630c6
commit 088e2395f1
474 changed files with 8476 additions and 8346 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
sql/table.h
View File

@@ -73,16 +73,16 @@ enum release_type { RELEASE_NORMAL, RELEASE_WAIT_FOR_DROP };
typedef struct st_filesort_info
{
IO_CACHE *io_cache; /* If sorted through filebyte */
uchar **sort_keys; /* Buffer for sorting keys */
byte *buffpek; /* Buffer for buffpek structures */
uint buffpek_len; /* Max number of buffpeks in the buffer */
byte *addon_buf; /* Pointer to a buffer if sorted with fields */
uint addon_length; /* Length of the buffer */
IO_CACHE *io_cache; /* If sorted through filesort */
uchar **sort_keys; /* Buffer for sorting keys */
uchar *buffpek; /* Buffer for buffpek structures */
uint buffpek_len; /* Max number of buffpeks in the buffer */
uchar *addon_buf; /* Pointer to a buffer if sorted with fields */
size_t addon_length; /* Length of the buffer */
struct st_sort_addon_field *addon_field; /* Pointer to the fields info */
void (*unpack)(struct st_sort_addon_field *, byte *); /* To unpack back */
byte *record_pointers; /* If sorted in memory */
ha_rows found_records; /* How many records in sort */
void (*unpack)(struct st_sort_addon_field *, uchar *); /* To unpack back */
uchar *record_pointers; /* If sorted in memory */
ha_rows found_records; /* How many records in sort */
} FILESORT_INFO;
@@ -137,7 +137,7 @@ typedef struct st_table_share
KEY *key_info; /* data of keys in database */
uint *blob_field; /* Index to blobs in Field arrray*/
byte *default_values; /* row with default values */
uchar *default_values; /* row with default values */
LEX_STRING comment; /* Comment about table */
CHARSET_INFO *table_charset; /* Default charset of string fields */
@@ -321,10 +321,10 @@ struct st_table {
THD *in_use; /* Which thread uses this */
Field **field; /* Pointer to fields */
byte *record[2]; /* Pointer to records */
byte *write_row_record; /* Used as optimisation in
uchar *record[2]; /* Pointer to records */
uchar *write_row_record; /* Used as optimisation in
THD::write_row */
byte *insert_values; /* used by INSERT ... UPDATE */
uchar *insert_values; /* used by INSERT ... UPDATE */
/*
Map of keys that can be used to retrieve all data from this table
needed by the query without reading the row.
@@ -422,12 +422,14 @@ struct st_table {
/*
If true, the current table row is considered to have all columns set to
NULL, including columns declared as "not null" (see maybe_null).
*/
my_bool null_row;
TODO: Each of these flags take up 8 bits. They can just as easily
/*
TODO: Each of the following flags take up 8 bits. They can just as easily
be put into one single unsigned long and instead of taking up 18
bytes, it would take up 4.
*/
my_bool null_row;
my_bool force_index;
my_bool distinct,const_table,no_rows;
my_bool key_read, no_keyread;
@@ -857,8 +859,8 @@ typedef struct st_table_list
thr_lock_type lock_type;
uint outer_join; /* Which join type */
uint shared; /* Used in multi-upd */
uint db_length;
uint32 table_name_length;
size_t db_length;
size_t table_name_length;
bool updatable; /* VIEW/TABLE can be updated now */
bool straight; /* optimize with prev table */
bool updating; /* for replicate-do/ignore table */
@@ -1152,3 +1154,6 @@ static inline void dbug_tmp_restore_column_map(MY_BITMAP *bitmap,
tmp_restore_column_map(bitmap, old);
#endif
}
size_t max_row_length(TABLE *table, const uchar *data);