177 lines
3.4 KiB
C
177 lines
3.4 KiB
C
/* hexconv - A Full Ascii to Hexidecimal & Hexidecimal to Ascii Converter.
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Copyright (C) 2003 Shaun Marquardt
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <conio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#define TRUE 1
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#define FALSE !TRUE
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void atoh( char *input );
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void htoa( char *input );
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void main( void )
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{
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char input[5000];
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clrscr();
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printf("1: Convert a string to Hexidecimal\n");
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printf("2: Convert hexidecimal to a String\n");
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printf("3: Exit\n");
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printf("\nEnter your choice: ");
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switch(getche())
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{
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case '1':
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printf("\nEnter the string to be converted\n: ");
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gets(input);
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atoh(input);
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break;
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case '2':
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printf("\nEnter the hexidecimal - read the README for more info\n: ");
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gets(input);
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htoa(input);
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break;
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case '3': break;
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default:
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printf("\nThat is an invalid choice!");
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getch();
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main();
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} //end switch
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exit(0);
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}
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void atoh( char *input )
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{
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unsigned char a;
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int x = 0, col = 0;
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int done;
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printf("String - \"%s\"\n",input);
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printf("--== Output ==--\n\n");
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printf("\"");
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done = FALSE;
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while(!done)
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{ //Go through list of characters
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for(a=32;a<128;a++)
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{
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if(input[x] == '\0') //End of input, done.
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{
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printf("\"\n");
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done = TRUE;
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break;
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}
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if(a != input[x] && input[x] != '\0') //Not matching, continue
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continue;
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if(a == input[x] ) //Matching, print character
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{
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printf("%X",a);
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col++;
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if(col >= 79)
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{
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col = 0;
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printf("\n\r");
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}
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break;
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}
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} //end for
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x++;
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} //end while
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printf("\nDone. Press the enter key to exit the program.");
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getch();
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exit(0);
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} //end atoh
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void htoa( char *input )
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{
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unsigned char a;
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char hex[5];
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char buf[5];
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int x = 0, col = 0;
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int done;
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hex[0] = '\0';
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if( (strlen(input) % 2) != 0 )
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{
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printf("Hex characters must be entered in pairs.\n");
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getch();
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exit(1);
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}
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printf("Hex - \"%s\"\n",input);
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printf("--== Output ==--\n\n");
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printf("\"");
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done = FALSE;
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while(!done)
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{
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if(input[x] == '\0') //End of input, done.
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{
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printf("\"\n");
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done = TRUE;
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break;
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}
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if(input[x] == ' ') //Space character? Print out a space.
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{
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printf("%c", ' ');
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x++;
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}
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sprintf(hex, "%c%c", toupper(input[x]), toupper(input[x+1])); //Get Hex Char
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x+=2;
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for(a=32;a<128;a++)
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{ //Go through list of characters
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sprintf(buf, "%X",a);
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if(!strcmp(buf, hex)) //Matching, print character
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printf("%c",a);
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else //Not Matching, continue
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continue;
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col++;
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if(col >= 79)
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{
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col = 0;
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printf("\n\r");
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}
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break;
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} //end "a" for loop
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} //end while
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printf("\nDone. Press the enter key to exit the program.");
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getch();
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exit(0);
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} //end htoa
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