pcfutil.c File Reference

#include "pcfutil.h"

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Functions
	BitOrderInvert (unsigned char *buf, size_t nbytes)
	TwoByteSwap (unsigned char *buf, size_t nbytes)
	FourByteSwap (unsigned char *buf, size_t nbytes)

Function Documentation

BitOrderInvert()

BitOrderInvert	(	unsigned char *	buf,
		size_t	nbytes
	)

Definition at line 43 of file pcfutil.c.

  {
    for ( ; nbytes > 0; nbytes--, buf++ )
    {
      unsigned int  val = *buf;
 
 
      val = ( ( val >> 1 ) & 0x55 ) | ( ( val << 1 ) & 0xAA );
      val = ( ( val >> 2 ) & 0x33 ) | ( ( val << 2 ) & 0xCC );
      val = ( ( val >> 4 ) & 0x0F ) | ( ( val << 4 ) & 0xF0 );
 
      *buf = (unsigned char)val;
    }
  }

Referenced by PCF_Glyph_Load().

FourByteSwap()

FourByteSwap	(	unsigned char *	buf,
		size_t	nbytes
	)

Definition at line 84 of file pcfutil.c.

  {
    for ( ; nbytes >= 4; nbytes -= 4, buf += 4 )
    {
      unsigned char  c;
 
 
      c      = buf[0];
      buf[0] = buf[3];
      buf[3] = c;
 
      c      = buf[1];
      buf[1] = buf[2];
      buf[2] = c;
    }
  }

Referenced by PCF_Glyph_Load().

TwoByteSwap()

TwoByteSwap	(	unsigned char *	buf,
		size_t	nbytes
	)

Definition at line 65 of file pcfutil.c.

  {
    for ( ; nbytes >= 2; nbytes -= 2, buf += 2 )
    {
      unsigned char  c;
 
 
      c      = buf[0];
      buf[0] = buf[1];
      buf[1] = c;
    }
  }

Referenced by PCF_Glyph_Load().