85 lines
1.6 KiB
C
85 lines
1.6 KiB
C
/* This file is part of stage0.
|
|
*
|
|
* stage0 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 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* stage0 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 stage0. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include<stdio.h>
|
|
#include<stdlib.h>
|
|
#include<stdbool.h>
|
|
|
|
void purge_line_comments()
|
|
{
|
|
char c;
|
|
do
|
|
{
|
|
c = getchar();
|
|
|
|
if (EOF == c)
|
|
{
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
} while ( '\n' != c );
|
|
}
|
|
|
|
int hex(char c)
|
|
{
|
|
switch(c)
|
|
{
|
|
case '0' ... '9': return (c - 48);
|
|
case 'a' ... 'f': return (c - 87);
|
|
case 'A' ... 'F': return (c - 55);
|
|
default: break;
|
|
}
|
|
|
|
printf("You managed to call a hex function without a hex value!!!\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
char c;
|
|
int sum;
|
|
bool toggle;
|
|
toggle = false;
|
|
|
|
do
|
|
{
|
|
c = getchar();
|
|
switch(c)
|
|
{
|
|
case '0' ... '9':
|
|
case 'a' ... 'f':
|
|
case 'A' ... 'F':
|
|
{
|
|
if(!toggle)
|
|
{
|
|
sum = hex(c);
|
|
toggle = true;
|
|
}
|
|
else
|
|
{
|
|
sum = (sum * 16) + hex(c);
|
|
toggle = false;
|
|
putc(sum, stdout);
|
|
}
|
|
break;
|
|
}
|
|
case '#': purge_line_comments();
|
|
default: break;
|
|
}
|
|
}while(c != EOF);
|
|
|
|
exit(EXIT_SUCCESS);
|
|
}
|