SDL_qsort.c File Reference

#include "SDL_config.h"
#include "SDL_stdinc.h"
#include "SDL_assert.h"

Go to the source code of this file.

Macros
#define	assert(X)   SDL_assert(X)
#define	doLeft   {first=ffirst;llast=last;continue;}
#define	doRight   {ffirst=first;last=llast;continue;}
#define	free   SDL_free
#define	Insertion(swapper)
#define	malloc   SDL_malloc
#define	memcpy   SDL_memcpy
#define	memmove   SDL_memmove
#define	Partition(swapper, sz)
#define	Pivot(swapper, sz)
#define	PIVOT_THRESHOLD   40
#define	pop
#define	PreInsertion(swapper, limit, sz)
#define	pushLeft   {stack[stacktop].first=ffirst;stack[stacktop++].last=last;}
#define	pushRight   {stack[stacktop].first=first;stack[stacktop++].last=llast;}
#define	qsort   SDL_qsort
#define	Recurse(Trunc)
#define	STACK_SIZE   (8*sizeof(size_t))
#define	SWAP_aligned(a, b)
#define	SWAP_nonaligned(a, b)
#define	SWAP_words(a, b)
#define	TRUNC_aligned   12
#define	TRUNC_nonaligned   12
#define	TRUNC_words   12*WORD_BYTES /* nb different meaning */
#define	WORD_BYTES   sizeof(int)

Functions
static char *	pivot_big (char *first, char *mid, char *last, size_t size, int compare(const void *, const void *))
void	qsort (void *base, size_t nmemb, size_t size, int(*compare)(const void *, const void *))
static void	qsort_aligned (void *base, size_t nmemb, size_t size, int(*compare)(const void *, const void *))
static void	qsort_nonaligned (void *base, size_t nmemb, size_t size, int(*compare)(const void *, const void *))
static void	qsort_words (void *base, size_t nmemb, int(*compare)(const void *, const void *))

Variables
static const char	_ID [] = "<qsort.c gjm 1.12 1998-03-19>"

Macro Definition Documentation

#define assert

(

X

)

SDL_assert(X)

Definition at line 65 of file SDL_qsort.c.

Referenced by qsort_aligned(), qsort_nonaligned(), and qsort_words().

#define doLeft   {first=ffirst;llast=last;continue;}

Definition at line 123 of file SDL_qsort.c.

#define doRight   {ffirst=first;last=llast;continue;}

Definition at line 124 of file SDL_qsort.c.

#define free   SDL_free

Definition at line 73 of file SDL_qsort.c.

#define Insertion

(

swapper

)

Value:

last=((char*)base)+nmemb*size;    \
  for (first=((char*)base)+size;first!=last;first+=size) {  \
    char *test;         \
    /* Find the right place for |first|.  \
     * My apologies for var reuse. */   \
    for (test=first-size;compare(test,first)>0;test-=size) ;  \
    test+=size;         \
    if (test!=first) {        \
      /* Shift everything in [test,first) \
       * up by one, and place |first|   \
       * where |test| is. */      \
      memcpy(pivot,first,size);     \
      memmove(test+size,test,first-test); \
      memcpy(test,pivot,size);      \
    }           \
  }

Definition at line 259 of file SDL_qsort.c.

Referenced by qsort_aligned(), and qsort_nonaligned().

#define malloc   SDL_malloc

Definition at line 69 of file SDL_qsort.c.

Referenced by qsort_aligned(), qsort_nonaligned(), and qsort_words().

#define memcpy   SDL_memcpy

Definition at line 77 of file SDL_qsort.c.

Referenced by qsort_aligned(), and qsort_nonaligned().

#define memmove   SDL_memmove

Definition at line 81 of file SDL_qsort.c.

Referenced by _ve_envelope_shift(), alsa_capture_samples(), TiXmlString::append(), TiXmlString::assign(), getAVAudioData(), Zeni::Sprite::insert_frame(), InsertUIntMapEntry(), lib3ds_util_insert_array(), lib3ds_util_remove_array(), LoadConfigFromFile(), main(), ogg_stream_flush_i(), ogg_stream_iovecin(), ogg_stream_pagein(), ogg_sync_buffer(), oggpack_writecopy_helper(), printEFXInfo(), Zeni::Sprite::remove_frame(), RemoveUIntMapKey(), SDL_memmove(), and vorbis_analysis_blockout().

#define Partition	(		swapper,
			sz
	)

Value:

{     \
  int swapped=0;        \
  do {            \
    while (compare(first,pivot)<0) first+=sz; \
    while (compare(pivot,last)<0) last-=sz; \
    if (first<last) {       \
      swapper(first,last); swapped=1;   \
      first+=sz; last-=sz; }      \
    else if (first==last) { first+=sz; last-=sz; break; }\
  } while (first<=last);      \
  if (!swapped) pop       \
}

Definition at line 232 of file SDL_qsort.c.

Referenced by qsort_aligned(), qsort_nonaligned(), and qsort_words().

#define Pivot	(		swapper,
			sz
	)

Value:

if ((size_t)(last-first)>PIVOT_THRESHOLD*sz) mid=pivot_big(first,mid,last,sz,compare);\
  else {  \
    if (compare(first,mid)<0) {     \
      if (compare(mid,last)>0) {    \
        swapper(mid,last);      \
        if (compare(first,mid)>0) swapper(first,mid);\
      }           \
    }           \
    else {          \
      if (compare(mid,last)>0) swapper(first,last)\
      else {          \
        swapper(first,mid);     \
        if (compare(mid,last)>0) swapper(mid,last);\
      }           \
    }           \
    first+=sz; last-=sz;      \
  }

Definition at line 208 of file SDL_qsort.c.

Referenced by qsort_aligned(), qsort_nonaligned(), and qsort_words().

#define PIVOT_THRESHOLD   40

Definition at line 114 of file SDL_qsort.c.

#define pop

Value:

{if (--stacktop<0) break;\
  first=ffirst=stack[stacktop].first;\
  last=llast=stack[stacktop].last;\
  continue;}

Definition at line 125 of file SDL_qsort.c.

Referenced by CPU_haveCPUID(), and SDL_SoftStretch().

#define PreInsertion	(		swapper,
			limit,
			sz
	)

Value:

first=base;         \
  last=first + (nmemb>limit ? limit : nmemb-1)*sz;\
  while (last!=base) {        \
    if (compare(first,last)>0) first=last;  \
    last-=sz; }         \
  if (first!=base) swapper(first,(char*)base);

Definition at line 250 of file SDL_qsort.c.

Referenced by qsort_aligned(), qsort_nonaligned(), and qsort_words().

#define pushLeft   {stack[stacktop].first=ffirst;stack[stacktop++].last=last;}

Definition at line 121 of file SDL_qsort.c.

#define pushRight   {stack[stacktop].first=first;stack[stacktop++].last=llast;}

Definition at line 122 of file SDL_qsort.c.

#define qsort   SDL_qsort

Definition at line 85 of file SDL_qsort.c.

#define Recurse

(

Trunc

)

Value:

{ size_t l=last-ffirst,r=llast-first; \
        if (l<Trunc) {        \
          if (r>=Trunc) doRight     \
          else pop        \
        }         \
        else if (l<=r) { pushLeft; doRight }  \
        else if (r>=Trunc) { pushRight; doLeft }\
        else doLeft       \
      }

Definition at line 196 of file SDL_qsort.c.

Referenced by qsort_aligned(), qsort_nonaligned(), and qsort_words().

#define STACK_SIZE   (8*sizeof(size_t))

Definition at line 97 of file SDL_qsort.c.

Referenced by qsort_aligned(), qsort_nonaligned(), and qsort_words().

#define SWAP_aligned	(		a,
			b
	)

Value:

{ \
  register int *aa=(int*)(a),*bb=(int*)(b); \
  register size_t sz=size; \
  do { register int t=*aa;*aa++=*bb; *bb++=t; } while (sz-=WORD_BYTES); }

Definition at line 282 of file SDL_qsort.c.

Referenced by qsort_aligned().

#define SWAP_nonaligned	(		a,
			b
	)

Value:

{ \
  register char *aa=(a),*bb=(b); \
  register size_t sz=size; \
  do { register char t=*aa; *aa++=*bb; *bb++=t; } while (--sz); }

Definition at line 277 of file SDL_qsort.c.

Referenced by qsort_nonaligned().

#define SWAP_words	(		a,
			b
	)

Value:

{ \
  register int t=*((int*)a); *((int*)a)=*((int*)b); *((int*)b)=t; }

Definition at line 287 of file SDL_qsort.c.

Referenced by qsort_words().

#define TRUNC_aligned   12

Definition at line 107 of file SDL_qsort.c.

Referenced by qsort_aligned().

#define TRUNC_nonaligned   12

Definition at line 106 of file SDL_qsort.c.

Referenced by qsort_nonaligned().

#define TRUNC_words   12*WORD_BYTES /* nb different meaning */

Definition at line 108 of file SDL_qsort.c.

Referenced by qsort_words().

#define WORD_BYTES   sizeof(int)

Definition at line 92 of file SDL_qsort.c.

Referenced by qsort(), and qsort_words().

Function Documentation

static char* pivot_big ( char *  first, char *  mid, char *  last, size_t  size, int   compareconst void *, const void *  )

static

Definition at line 293 of file SDL_qsort.c.

References d.

void qsort	(	void *	base,
		size_t	nmemb,
		size_t	size,
		int(*)(const void *, const void *)	compare
	)

Definition at line 460 of file SDL_qsort.c.

References qsort_aligned(), qsort_nonaligned(), qsort_words(), and WORD_BYTES.

Referenced by floor1_look(), floor1_unpack(), kfdata_read(), main(), names_sort(), noise_normalize(), vorbis_book_init_decode(), vorbis_lpc_to_lsp(), vqgen_cellmetric(), vqgen_iterate(), and vqgen_sortmesh().

static void qsort_aligned ( void *  base, size_t  nmemb, size_t  size, int(*)(const void *, const void *)  compare  )

static

Definition at line 370 of file SDL_qsort.c.

References assert, free, Insertion, malloc, memcpy, Partition, Pivot, PreInsertion, Recurse, STACK_SIZE, SWAP_aligned, and TRUNC_aligned.

Referenced by qsort().

static void qsort_nonaligned ( void *  base, size_t  nmemb, size_t  size, int(*)(const void *, const void *)  compare  )

static

Definition at line 336 of file SDL_qsort.c.

References assert, free, Insertion, malloc, memcpy, Partition, Pivot, PreInsertion, Recurse, STACK_SIZE, SWAP_nonaligned, and TRUNC_nonaligned.

Referenced by qsort().

static void qsort_words ( void *  base, size_t  nmemb, int(*)(const void *, const void *)  compare  )

static

Definition at line 404 of file SDL_qsort.c.

References assert, free, malloc, Partition, Pivot, PreInsertion, Recurse, STACK_SIZE, SWAP_words, TRUNC_words, and WORD_BYTES.

Referenced by qsort().

Variable Documentation

const char _ID[] = "<qsort.c gjm 1.12 1998-03-19>"

static

Definition at line 87 of file SDL_qsort.c.