fthash.c File Reference

#include <freetype/internal/fthash.h>
#include <freetype/internal/ftmemory.h>

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Macros
#define	INITIAL_HT_SIZE   241

Functions
static FT_ULong	hash_str_lookup (FT_Hashkey *key)
static FT_ULong	hash_num_lookup (FT_Hashkey *key)
static FT_Bool	hash_str_compare (FT_Hashkey *a, FT_Hashkey *b)
static FT_Bool	hash_num_compare (FT_Hashkey *a, FT_Hashkey *b)
static FT_Hashnode *	hash_bucket (FT_Hashkey key, FT_Hash hash)
static FT_Error	hash_rehash (FT_Hash hash, FT_Memory memory)
static FT_Error	hash_init (FT_Hash hash, FT_Bool is_num, FT_Memory memory)
FT_Error	ft_hash_str_init (FT_Hash hash, FT_Memory memory)
FT_Error	ft_hash_num_init (FT_Hash hash, FT_Memory memory)
void	ft_hash_str_free (FT_Hash hash, FT_Memory memory)
static FT_Error	hash_insert (FT_Hashkey key, size_t data, FT_Hash hash, FT_Memory memory)
FT_Error	ft_hash_str_insert (const char *key, size_t data, FT_Hash hash, FT_Memory memory)
FT_Error	ft_hash_num_insert (FT_Int num, size_t data, FT_Hash hash, FT_Memory memory)
static size_t *	hash_lookup (FT_Hashkey key, FT_Hash hash)
size_t *	ft_hash_str_lookup (const char *key, FT_Hash hash)
size_t *	ft_hash_num_lookup (FT_Int num, FT_Hash hash)

Macro Definition Documentation

INITIAL_HT_SIZE

#define INITIAL_HT_SIZE   241

Definition at line 46 of file fthash.c.

Function Documentation

ft_hash_num_init()

FT_Error ft_hash_num_init	(	FT_Hash	hash,
		FT_Memory	memory
	)

Definition at line 203 of file fthash.c.

  {
    return hash_init( hash, 1, memory );
  }

Referenced by parse_subrs().

ft_hash_num_insert()

FT_Error ft_hash_num_insert	(	FT_Int	num,
		size_t	data,
		FT_Hash	hash,
		FT_Memory	memory
	)

Definition at line 286 of file fthash.c.

  {
    FT_Hashkey  hk;
 
 
    hk.num = num;
 
    return hash_insert( hk, data, hash, memory );
  }

Referenced by parse_subrs().

ft_hash_num_lookup()

size_t * ft_hash_num_lookup	(	FT_Int	num,
		FT_Hash	hash
	)

Definition at line 326 of file fthash.c.

  {
    FT_Hashkey  hk;
 
 
    hk.num = num;
 
    return hash_lookup( hk, hash );
  }

Referenced by cf2_interpT2CharString(), t1_decoder_parse_metrics(), and t1_ps_get_font_value().

ft_hash_str_free()

void ft_hash_str_free	(	FT_Hash	hash,
		FT_Memory	memory
	)

Definition at line 211 of file fthash.c.

  {
    if ( hash )
    {
      FT_UInt       sz = hash->size;
      FT_Hashnode*  bp = hash->table;
      FT_UInt       i;
 
 
      for ( i = 0; i < sz; i++, bp++ )
        FT_FREE( *bp );
 
      FT_FREE( hash->table );
    }
  }

Referenced by bdf_free_font().

ft_hash_str_init()

FT_Error ft_hash_str_init	(	FT_Hash	hash,
		FT_Memory	memory
	)

Definition at line 195 of file fthash.c.

  {
    return hash_init( hash, 0, memory );
  }

Referenced by _bdf_parse_start().

ft_hash_str_insert()

FT_Error ft_hash_str_insert	(	const char *	key,
		size_t	data,
		FT_Hash	hash,
		FT_Memory	memory
	)

Definition at line 271 of file fthash.c.

  {
    FT_Hashkey  hk;
 
 
    hk.str = key;
 
    return hash_insert( hk, data, hash, memory );
  }

Referenced by _bdf_add_property(), _bdf_parse_start(), and bdf_create_property().

ft_hash_str_lookup()

size_t * ft_hash_str_lookup	(	const char *	key,
		FT_Hash	hash
	)

Definition at line 313 of file fthash.c.

  {
    FT_Hashkey  hk;
 
 
    hk.str = key;
 
    return hash_lookup( hk, hash );
  }

Referenced by _bdf_add_property(), bdf_create_property(), bdf_get_font_property(), and bdf_get_property().

hash_bucket()

static FT_Hashnode * hash_bucket ( FT_Hashkey  key, FT_Hash  hash  )

static

Definition at line 105 of file fthash.c.

  {
    FT_ULong      res = 0;
    FT_Hashnode*  bp  = hash->table;
    FT_Hashnode*  ndp;
 
 
    res = (hash->lookup)( &key );
 
    ndp = bp + ( res % hash->size );
    while ( *ndp )
    {
      if ( (hash->compare)( &(*ndp)->key, &key ) )
        break;
 
      ndp--;
      if ( ndp < bp )
        ndp = bp + ( hash->size - 1 );
    }
 
    return ndp;
  }

hash_init()

static FT_Error hash_init ( FT_Hash  hash, FT_Bool  is_num, FT_Memory  memory  )

static

Definition at line 165 of file fthash.c.

  {
    FT_UInt   sz = INITIAL_HT_SIZE;
    FT_Error  error;
 
 
    hash->size  = sz;
    hash->limit = sz / 3;
    hash->used  = 0;
 
    if ( is_num )
    {
      hash->lookup  = hash_num_lookup;
      hash->compare = hash_num_compare;
    }
    else
    {
      hash->lookup  = hash_str_lookup;
      hash->compare = hash_str_compare;
    }
 
    FT_MEM_NEW_ARRAY( hash->table, sz );
 
    return error;
  }

Referenced by BCryptCreateHash(), ft_hash_num_init(), and ft_hash_str_init().

hash_insert()

static FT_Error hash_insert ( FT_Hashkey  key, size_t  data, FT_Hash  hash, FT_Memory  memory  )

static

Definition at line 233 of file fthash.c.

  {
    FT_Hashnode   nn;
    FT_Hashnode*  bp    = hash_bucket( key, hash );
    FT_Error      error = FT_Err_Ok;
 
 
    nn = *bp;
    if ( !nn )
    {
      if ( FT_NEW( nn ) )
        goto Exit;
      *bp = nn;
 
      nn->key  = key;
      nn->data = data;
 
      if ( hash->used >= hash->limit )
      {
        error = hash_rehash( hash, memory );
        if ( error )
          goto Exit;
      }
 
      hash->used++;
    }
    else
      nn->data = data;
 
  Exit:
    return error;
  }

Referenced by ft_hash_num_insert(), and ft_hash_str_insert().

hash_lookup()

static size_t * hash_lookup ( FT_Hashkey  key, FT_Hash  hash  )

static

Definition at line 301 of file fthash.c.

  {
    FT_Hashnode*  np = hash_bucket( key, hash );
 
 
    return (*np) ? &(*np)->data
                 : NULL;
  }

Referenced by ft_hash_num_lookup(), and ft_hash_str_lookup().

hash_num_compare()

static FT_Bool hash_num_compare ( FT_Hashkey *  a, FT_Hashkey *  b  )

static

Definition at line 94 of file fthash.c.

  {
    if ( a->num == b->num )
      return 1;
 
    return 0;
  }

Referenced by hash_init().

hash_num_lookup()

static FT_ULong hash_num_lookup ( FT_Hashkey *  key )

static

Definition at line 65 of file fthash.c.

  {
    FT_ULong  num = (FT_ULong)key->num;
    FT_ULong  res;
 
 
    /* Mocklisp hash function. */
    res = num & 0xFF;
    res = ( res << 5 ) - res + ( ( num >>  8 ) & 0xFF );
    res = ( res << 5 ) - res + ( ( num >> 16 ) & 0xFF );
    res = ( res << 5 ) - res + ( ( num >> 24 ) & 0xFF );
 
    return res;
  }

Referenced by hash_init().

hash_rehash()

static FT_Error hash_rehash ( FT_Hash  hash, FT_Memory  memory  )

static

Definition at line 131 of file fthash.c.

  {
    FT_Hashnode*  obp = hash->table;
    FT_Hashnode*  bp;
    FT_Hashnode*  nbp;
 
    FT_UInt   i, sz = hash->size;
    FT_Error  error = FT_Err_Ok;
 
 
    hash->size <<= 1;
    hash->limit  = hash->size / 3;
 
    if ( FT_NEW_ARRAY( hash->table, hash->size ) )
      goto Exit;
 
    for ( i = 0, bp = obp; i < sz; i++, bp++ )
    {
      if ( *bp )
      {
        nbp = hash_bucket( (*bp)->key, hash );
        *nbp = *bp;
      }
    }
 
    FT_FREE( obp );
 
  Exit:
    return error;
  }

Referenced by hash_insert().

hash_str_compare()

static FT_Bool hash_str_compare ( FT_Hashkey *  a, FT_Hashkey *  b  )

static

Definition at line 82 of file fthash.c.

  {
    if ( a->str[0] == b->str[0]           &&
         ft_strcmp( a->str, b->str ) == 0 )
      return 1;
 
    return 0;
  }

Referenced by hash_init().

hash_str_lookup()

static FT_ULong hash_str_lookup ( FT_Hashkey *  key )

static

Definition at line 50 of file fthash.c.

  {
    const char*  kp  = key->str;
    FT_ULong     res = 0;
 
 
    /* Mocklisp hash function. */
    while ( *kp )
      res = ( res << 5 ) - res + (FT_ULong)*kp++;
 
    return res;
  }

Referenced by hash_init().