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ting.h

/*      Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004 Stijn van Dongen
 *
 * This file is part of MCL.  You can redistribute and/or modify MCL under the
 * terms of the GNU General Public License; either version 2 of the License or
 * (at your option) any later version.  You should have received a copy of the
 * GPL along with MCL, in the file COPYING.
*/

#ifndef util_ting
#define util_ting

#include <string.h>

#include "compile.h"
#include "alloc.h"
#include "types.h"
#include "hash.h"


typedef struct
{  char     *str
;  int      len
;  int      mxl
;
}  mcxTing  ;


/*  **************************************************************************
 * *
 **            Implementation notes (a few).
 *
*

  Synopsis
 *    This little module provides an objectified C-string compatible interface
 *    to strings.

 * Some philosophy
 *    Do not mind the overhead of 2*sizeof(int) bytes per ting.
 *    If you have humongous amounts of small strings, use C-strings; optionally
 *    you can do the needed char manipulation in a ting used as scratch-space,
 *    then create a normal string once you are done.
 *
 *    Feel free to use the str member with routines from <string.h>
 *    or perhaps from ding.h. Just remember to treat it as a const object
 *    when doing so.

 * Caveat
 *    When compiled to return (rather than exit) in case of alloc failure,
 *    nearly all routines return a NULL pointer indicating failure.

 * Data structure
 *    str:  array of chars
 *
 *    len:  length of string in str (excluding '\0')
 *          *(str+len) == '\0'
 *
 *    mxl:  current allocated number of writable char's (excluding '\0')
 *          Allocated amount is mxl+1
 *          *(str+mxl) == '\0' - but don't count on that.

 * Notes
 *    mcxTingEnsure is the only routine allowed to fiddle with mxl.
 *    (apart from mcxTingInit which sets it to zero).
 *
 *    Future option could be stuff like
 *       mcxTingFinalize,  (release unused memory).
 *       mcxTingify,       (plunge char* str into a new ting).
 *       mcxTingish,       (return char* str, free ting).
 * 
 *    Routines marked `!' will NOT accept ting==NULL argument.
 *    Routines marked `#' should not be called other than by ting routines
 * 
 *                _ #Init  _
 *               /          \
 *          Ensure   <--- #Instantiate
 *         /       \               \                   
 *   Empty       !Splice        New,Write,Print,PrintAfter
 *   NWrite           |               
 *                    |
 *           Append,Insert,Delete,PrintSplice
*/



/*  **************************************************************************
 * *
 **   Various instantiation routines.
*/

                          /*     Accepts NULL argument.
                           *     void arguments so that it can be used
                           *     as callback.
                           *
                           *     Should ordinarily *not* be used, unless
                           *     you want to initialize a ting allocated
                           *     on the frame stack.
                          */
void* mcxTingInit
(  void* ting
)  ;  
                          /*     Accepts NULL argument.
                           *     Should ordinarily *not* be used.
                          */
mcxTing* mcxTingInstantiate
(  mcxTing*    dst_ting
,  const char* str
)  ;  
                          /*     Accepts NULL argument.  Does not affect
                           *     ting->str.  used for preallocing, e.g. to
                           *     prepare for successive calls of Append.  (see
                           *     also Empty).
                          */

mcxTing* mcxTingEnsure
(  mcxTing*    ting
,  int         length
)  ;  
                          /*     Accepts NULL argument. The string part is
                           *     set to the empty string.
                           *     Can be used for preallocing.
                          */
mcxTing* mcxTingEmpty
(  mcxTing*    ting
,  int         length
)  ;



/*  **************************************************************************
 * *
 **   Some freeing routines.
*/
                          /*     You pass the address of a variable,
                           *     loosely speaking.
                          */
void mcxTingFree
(  mcxTing     **tingpp
)  ;
                          /*     Use with callbacks, e.g.
                           *     for freeing hash with tings in one go.
                          */
void mcxTingFree_v
(  void        *tingpp
)  ;
                          /*     Use for freeing array of ting;
                           *     e.g. as callback in mcxNFree.
                          */
void mcxTingRelease
(  void        *ting
)  ;



/*  **************************************************************************
 * *
 **   A bunch of user-land creation routines.
*/

                          /*     accepts NULL argument, maps to empty string.
                          */
mcxTing* mcxTingNew
(  const char* str
)  ;
                          /*     accepts NULL argument, maps to empty string.
                          */
mcxTing* mcxTingNNew
(  const char* str
,  int         n
)  ;
                          /*     accepts NULL argument.
                          */
mcxTing* mcxTingWrite
(  mcxTing*    ting
,  const char* str
)  ;
                          /*     accepts NULL argument.
                          */
mcxTing* mcxTingNWrite
(  mcxTing*    ting
,  const char* str
,  int         n
)  ;



/*  **************************************************************************
 * *
 **   Appending, inserting, deleting, shrinking.
 *    Some can be used as creation routine (e.g. append).
*/


#define TING_INS_CENTER      -3
#define TING_INS_OVERRUN     -4
#define TING_INS_OVERWRITE   -5

/*
 *    The offset argument can be negative, for subscripting from the end.
 *
 *    The n_delete argument can be nonnegative, or one of
 *    TING_INS_CENTER     center, (try to) overwrite without changing length.
 *    TING_INS_OVERRUN    overwrite till the end.
 *    TING_INS_OVERWRITE  (try to) overwrite without changing length.
 *
 *    The n_copy argument is not magical like the previous two.
 *
*/
                          /*     does NOT accept NULL argument.
                          */
mcxstatus mcxTingSplice
(  mcxTing*    ting
,  const char* pstr
,  int         d_offset
,  int         n_delete
,  int         n_copy
)  ;
                          /*     accepts NULL argument.
                          */
mcxTing* mcxTingInsert
(  mcxTing*    ting
,  const char* str
,  int         offset
)  ;
                          /*     accepts NULL argument.
                          */
mcxTing* mcxTingNInsert
(  mcxTing*    ting
,  const char* str
,  int         offset     /*  of ting->str */
,  int         length     /*  of str       */
)  ;

                          /*     accepts NULL argument.
                          */
mcxTing* mcxTingAppend
(  mcxTing*    ting
,  const char* str
)  ;
                          /*     accepts NULL argument.
                          */
mcxTing* mcxTingKAppend
(  mcxTing*    ting
,  const char* str
,  int         n
)  ;
                          /*     accepts NULL argument.
                          */
mcxTing* mcxTingNAppend
(  mcxTing*    ting
,  const char* str
,  int         n
)  ;
                          /*     accepts NULL argument.
                          */
mcxTing* mcxTingDelete
(  mcxTing*    ting
,  int         offset
,  int         width
)  ;
                          /*     accepts NULL argument.
                          */
mcxTing* mcxTingShrink
(  mcxTing*    ting
,  int         length
)  ;



/*  **************************************************************************
 * *
 **   A bunch of printf like routines.
*/

                          /*     Accepts NULL argument.
                          */
mcxTing* mcxTingPrint
(  mcxTing*    ting
,  const char* fmt
,  ...
)
#ifdef __GNUC__
__attribute__ ((format (printf, 2, 3)))
#endif
   ;
                          /*     Accepts NULL argument.
                          */
mcxTing*  mcxTingPrintAfter
(  mcxTing*    dst
,  const char* fmt
,  ...
)
#ifdef __GNUC__
__attribute__ ((format (printf, 2, 3)))
#endif
   ;
                          /*     Accepts NULL argument.
                           *     same offset and delete interface as
                           *     mcxTingSplice.
                          */
mcxTing*  mcxTingPrintSplice
(  mcxTing*    dst
,  int offset
,  int delete              /* count of chars to delete */
,  const char* fmt
,  ...
)
#ifdef __GNUC__
__attribute__ ((format (printf, 4, 5)))
#endif
   ;


/*  **************************************************************************
 * *
 **   Miscellaneous.
*/

char*  mcxTingStr
(  const mcxTing*    ting
)  ;

char* mcxTingSubStr
(  const mcxTing*    ting
,  int         offset
,  int         length
)  ;

int mcxTingTranslate
(  mcxTing*    src
,  int*        tbl        /* should have size 256 */
,  int         flags
)  ;

int mcxTingTr
(  mcxTing*    txt
,  const char* src
,  const char* dst
,  int         flags
)  ;
                          /*     accepts NULL argument.
                          */
mcxTing*  mcxTingRoman
(  mcxTing*    dst
,  int         x
,  mcxbool     ucase
)  ;
                          /*     accepts NULL argument.
                          */
mcxTing*  mcxTingInteger
(  mcxTing*    dst
,  long        x
)  ;
                          /*     accepts NULL argument.
                          */
mcxTing*  mcxTingDouble
(  mcxTing* dst
,  double   x
,  int      decimals
)  ;


/*  **************************************************************************
 * *
 **   Comparing.
*/

int mcxTingCmp
(  const void* t1
,  const void* t2
)  ;

int mcxTingRevCmp
(  const void* t1
,  const void* t2
)  ;


/*  **************************************************************************
 * *
 **   Hashing.
*/

u32 (*mcxTingHFieByName(const char* id))(const void* ting)  ;


u32 mcxTingELFhash
(  const void* ting
)  ;

u32 mcxTingHash
(  const void* ting
)  ;

u32 mcxTingBJhash
(  const void* ting
)  ;

u32 mcxTingCThash
(  const void* ting
)  ;

u32 mcxTingDPhash
(  const void* ting
)  ;

u32 mcxTingBDBhash
(  const void* ting
)  ;

u32 mcxTingGEhash
(  const void* ting
)  ;

u32 mcxTingOAThash
(  const void* ting
)  ;

u32 mcxTingSvDhash
(  const void* ting
)  ;

u32 mcxTingSvD2hash
(  const void* ting
)  ;

u32 mcxTingSvD1hash
(  const void* ting
)  ;

u32 mcxTingDJBhash
(  const void* ting
)  ;

#endif


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