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/******************************************************************************\
* Copyright (C) 2001 writen by Jewfish and Armoth *
* *
* Description: this codes allows a user to view and edit the hexadecimal and*
* and ascii values of a file. The curses library is used to *
* display and manipulate the output. See the README file *
* included for more information. *
* *
* 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; if not, write to the Free Software *
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
* *
\******************************************************************************/
#include "hex.h" /* custom header */
/*#define DEBUG_LLIST*/
/*#define DEBUG_GOTO*/
int BASE, MAXY, resize = 0;
int MIN_ADDR_LENGTH;
hexList *head; /* linked list struct */
WINS *windows; /* window structure */
char EBCDIC[256],
*fpINfilename = NULL,
*fpOUTfilename = NULL;
bool printHex; /* address format */
bool USE_EBCDIC;
bool IN_HELP; /* if help displayed */
int hex_win_width,
ascii_win_width,
hex_outline_width,
ascii_outline_width;
/* partial EBCDIC table contributed by Ted (ted@php.net) */
char EBCDIC[] = {
/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
'.','.','.','.','.','.','.','.','.','.','.','.','.','.' ,'.','.', /* 0 */
'.','.','.','.','.','.','.','.','.','.','.','.','.','.' ,'.','.', /* 1 */
'.','.','.','.','.','.','.','.','.','.','.','.','.','.' ,'.','.', /* 2 */
'.','.','.','.','.','.','.','.','.','.','.','.','.','.' ,'.','.', /* 3 */
' ','.','.','.','.','.','.','.','.','.','.','.','<','(' ,'+','|', /* 4 */
'&','.','.','.','.','.','.','.','.','.','!','$','*',')' ,';','.', /* 5 */
'-','/','.','.','.','.','.','.','.','.','.',',','%','_' ,'>','?', /* 6 */
'.','.','.','.','.','.','.','.','.','.',':','#','@','\'','=','"', /* 7 */
'.','a','b','c','d','e','f','g','h','i','.','.','.','.' ,'.','.', /* 8 */
'.','.','j','k','l','m','n','o','p','q','.','.','.','.' ,'.','.', /* 9 */
'.','r','s','t','u','v','w','x','y','z','.','.','.','.' ,'.','.', /* A */
'.','.','.','.','.','.','.','.','.','`','.','.','.','.' ,'.','.', /* B */
'.','A','B','C','D','E','F','G','H','I','.','.','.','.' ,'.','.', /* C */
'.','.','J','K','L','M','N','O','P','Q','.','.','.','.' ,'.','.', /* D */
'.','R','S','T','U','V','W','X','Y','Z','.','.','.','.' ,'.','.', /* E */
'0','1','2','3','4','5','6','7','8','9','.','.','.','.' ,'.','.'};/* F */
int main(int argc, char *argv[]) /* main program */
{
int x, retval = 1, val; /* counters, etc. */
off_t len; /* len need to be off_t*/
windows = (WINS *) calloc(1, sizeof(WINS)); /* malloc windows */
head = llalloc(); /* malloc list space */
fpINfilename = (char *) malloc(FN_LEN+1); /* allocate in and */
fpOUTfilename = (char *) malloc(FN_LEN+1); /* out file name ptrs */
printHex = TRUE; /* address format */
USE_EBCDIC = FALSE; /*use ascii by default*/
/* get cmd line args */
len = parseArgs(argc, argv, fpINfilename, fpOUTfilename);
MIN_ADDR_LENGTH = getMinimumAddressLength(len);
use_env(TRUE); /* use env values */
slk_init(0); /* init menu bar */
init_screen(); /* init visuals */
if ((COLS < MIN_COLS) || (LINES < MIN_LINES)) /* screen's too small */
{
endwin();
fprintf(stderr,"\n\nThe screen size too small.\nThe minimum allowable");
fprintf(stderr," screen size is %dx%d\n\n", MIN_COLS, MIN_LINES + 1);
exit(-1);
}
slk_set(6, (printHex) ? "Hex Addr":"Dec Addr", 1);
init_fkeys(); /* define menu bar */
while (retval)
{
free_windows(windows);
/* calculate screen */
BASE = (resize > 0 && resize < COLS) ? resize:((COLS-6-MIN_ADDR_LENGTH)/4);
MAXY = (LINES) - 3;
hex_win_width = BASE * 3;
ascii_win_width = BASE;
hex_outline_width = (BASE * 3) + 3 + MIN_ADDR_LENGTH;
ascii_outline_width = BASE + 2;
init_menu(windows); /* init windows */
head = freeList(head); /* free & init head */
/* print origin loc */
mvwprintw(windows->hex_outline, 0, 1, "%0*d", MIN_ADDR_LENGTH, 0);
if (fpIN != NULL) /* if no infile... */
{
len = maxLoc(fpIN); /* get last file loc */
val = maxLines(len); /* max file lines */
for (x = 0; x <= MAXY && x<=val; x++) /* output lines */
outline(fpIN, x);
}
wmove(windows->hex, 0, 0); /* cursor to origin */
refreshall(windows); /* refresh all wins */
doupdate(); /* update screen */
mvwaddch(windows->scrollbar, 1, 0, ACS_CKBOARD);/* clear scroller */
/* get user input */
retval = wacceptch(windows, len, fpINfilename, fpOUTfilename);
}
screen_exit(0); /* end visualizations */
return retval; /* return */
}
/********************************************************\
* Description: prints out debug info to a file *
* Returns: nothing *
\********************************************************/
/*
void printDebug(hexList *head, long int loc)
{
FILE *tmpofp;
hexList *tmpHead = head;
tmpofp = fopen("debug_llist", "a+");
tmpHead = head;
fprintf(tmpofp, "location undone: %08X\n", loc);
while (tmpHead != NULL)
{
fprintf(tmpofp, "head->loc: %08X head->val: %02X (%c)\n", tmpHead->loc, tmpHead->val, tmpHead->val);
tmpHead = tmpHead->next;
}
fprintf(tmpofp, "\n");
fclose(tmpofp);
}
*/
/********************************************************\
* Description: parses command line arguments and *
* processes them. *
* Returns: length of file *
\********************************************************/
off_t parseArgs(int argc, char *argv[], char *fpINfilename, char *fpOUTfilename)
{
extern char *optarg; /* extern vars for */
extern int optind, /*opterr,*/ optopt; /* getopt() */
int val; /* counters, etc. */
/* get args */
while ((val = hgetopt(argc, argv, "a:i:o:r:e")) != -1)
{
switch (val) /* test args */
{
case 'a': printHex = FALSE; /* decimal addresses */
break;
/* infile */
case 'i': strncpy(fpINfilename, optarg, FN_LEN);
break;
/* outfile */
case 'o': strncpy(fpOUTfilename, optarg, FN_LEN);
break;
case 'r': resize = atoi(optarg); /* don't resize screen*/
break;
case 'e': USE_EBCDIC=TRUE; /*use instead of ascii*/
break;
/* help/invalid args */
/* help/invalid args */
case '?': print_usage(); /* output help */
if ((optopt == 'h') || (optopt == '?'))
exit(0); /* exit */
else /* illegal option */
exit(-1);
}
}
argc -= optind;
argv += optind;
if (argv[0])
strncpy(fpINfilename, argv[0], FN_LEN);
if (strcmp(fpINfilename, ""))
if ((fpIN = fopen(fpINfilename, "r")) == NULL)
exit_err("Could not open file");
return ((fpIN != NULL) ? maxLoc(fpIN):0); /* return file length */
}
/********************************************************\
* Description: Get the minimum address length for the *
* address column *
* Returns: minimum length for addresses *
\********************************************************/
int getMinimumAddressLength(off_t len)
{
int min_address_length;
min_address_length = snprintf(NULL, 0, "%jd", (intmax_t)len);
/* At least 8 characters wide */
return min_address_length > 8 ? min_address_length : 8;
}
/********************************************************\
* Description: in the event of a segmentation fault *
* this catches the signal and prints out *
* instructions on where to send a bug *
* report. *
* Returns: length of file *
\********************************************************/
void catchSegfault(int sig)
{
/* Avoid unused variable warning */
UNUSED(sig);
endwin();
printf("\n\nHexcurse has encountered a segmentation fault!\n");
printf("\tPlease submit a full bug report to devel@jewfish.net.\n");
printf("\tInclude what you did to cause the segfault, and if possible\n");
printf("\tinclude the core dump. And for your troubles, we'll add you \n");
printf("\tto the Changelog. Then you can brag to your friends about it!\n");
exit(-1);
}
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