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Mac-Source 1994 July
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C and C++
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Voyeur 1.1.1
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Voyeur ƒ
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v code ƒ
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v hex.c
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1994-02-26
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/**********************************************************************\
File: v hex.c
Purpose: This module handles hex numbers as strings and strings as
hex numbers.
Voyeur -- a no-frills file viewer
Copyright ©1993-4, Mark Pilgrim
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program in a file named "GNU General Public License".
If not, write to the Free Software Foundation, 675 Mass Ave,
Cambridge, MA 02139, USA.
\**********************************************************************/
#include "v hex.h"
#include "program globals.h"
void HexStringToAsciiString(Str255 hexString, Str255 asciiString)
{
int i;
if (hexString[0]&1)
{
hexString[hexString[0]+1]=hexString[hexString[0]];
hexString[hexString[0]]='0';
hexString[0]++;
}
asciiString[0]=0x00;
for (i=1; i<=hexString[0]; i+=2)
asciiString[++asciiString[0]]=
((hexString[i]-((hexString[i]>'9') ? 'A' : '0'))<<4) +
hexString[i+1]-((hexString[i+1]>'9') ? 'A' : '0');
}
void LongToHexString(unsigned long input, Str255 result)
{
result[0]=0x08;
result[1]=hexchar[0][(input>>24)&0xff];
result[2]=hexchar[1][(input>>24)&0xff];
result[3]=hexchar[0][(input>>16)&0xff];
result[4]=hexchar[1][(input>>16)&0xff];
result[5]=hexchar[0][(input>>8)&0xff];
result[6]=hexchar[1][(input>>8)&0xff];
result[7]=hexchar[0][input&0xff];
result[8]=hexchar[1][input&0xff];
}
Boolean ValidHex(Str255 tempStr)
{
int i;
for (i=1; i<=tempStr[0]; i++)
if (!(((tempStr[i]>='0') && (tempStr[i]<='9')) ||
(((tempStr[i]|0x20)>='a') && ((tempStr[i]|0x20)<='f'))))
return FALSE;
return TRUE;
}
unsigned long HexStringToLong(Str255 tempStr)
{
int i;
unsigned long result;
unsigned long mult;
unsigned long digit;
while (tempStr[0]<8)
{
for (i=tempStr[0]; i>0; i--)
tempStr[i+1]=tempStr[i];
tempStr[1]='0';
tempStr[0]++;
}
mult=1L;
result=0L;
for (i=8; i>0; i--)
{
if ((tempStr[i]>='0') && (tempStr[i]<='9'))
digit=tempStr[i]-'0';
else
digit=(tempStr[i]|0x20)-'a'+10;
result+=digit*mult;
mult=mult<<4;
}
return result;
}
pascal Boolean HexOFilter(DialogPtr theDialog, EventRecord *theEvent, short *theItem)
{
unsigned char theChar;
short itemType;
Handle itemH;
Rect box;
unsigned long dummy;
switch (theEvent->what)
{
case keyDown:
case autoKey:
theChar=theEvent->message & charCodeMask;
if ((theChar==0x0d) || (theChar==0x03))
{
*theItem=1;
GetDItem(theDialog, 1, &itemType, &itemH, &box);
HiliteControl((ControlHandle)itemH, 1);
Delay(8, &dummy);
HiliteControl((ControlHandle)itemH, 0);
return TRUE;
}
if ((theChar==0x1b) ||
((theEvent->modifiers & cmdKey) && (theChar=='.')))
{
*theItem=2;
GetDItem(theDialog, 2, &itemType, &itemH, &box);
HiliteControl((ControlHandle)itemH, 1);
Delay(8, &dummy);
HiliteControl((ControlHandle)itemH, 0);
return TRUE;
}
if ((theChar>='a') && (theChar<='f'))
theEvent->message&=0xffffffdf; /* convert to uppercase */
else if ((theChar>='A') && (theChar<='F'));
else if ((theChar>='0') && (theChar<='9'));
else if ((theChar==0x08) || (theChar==0x09) ||
((theChar>=0x1c) && (theChar<=0x1f)));
else if (theEvent->modifiers&cmdKey);
else
{
SysBeep(7);
theEvent->what=nullEvent;
}
break;
}
return FALSE;
}