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/* hexedit -- Hexadecimal Editor for Binary Files
Copyright (C) 1998 Pixel (Pascal Rigaux)
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, 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 "hexedit.h"
/*******************************************************************************/
/* Mark functions */
/*******************************************************************************/
void markRegion(int a, int b) { int i; for (i = MAX(a - base, 0); i <= MIN(b - base, nbBytes - 1); i++) markIt(i); }
void unmarkRegion(int a, int b) { int i; for (i = MAX(a - base, 0); i <= MIN(b - base, nbBytes - 1); i++) unmarkIt(i); }
void markSelectedRegion(void) { markRegion(mark_min, mark_max); }
void unmarkAll(void) { unmarkRegion(base, base + nbBytes - 1); }
void markIt(int i) { bufferAttr[i] |= MARKED; }
void unmarkIt(int i) { bufferAttr[i] &= ~MARKED; }
void copy_region(void)
{
typePage *p;
if (!mark_set) { displayMessageAndWaitForKey("Nothing to copy"); return; }
sizeCopyBuffer = mark_max - mark_min + 1;
if (sizeCopyBuffer == 0) return;
if (sizeCopyBuffer > BIGGEST_COPYING) {
displayTwoLineMessage("Hey, don't you think that's too big?!", "Really copy (Yes/No)");
if (tolower(getch()) != 'y') return;
}
FREE(copyBuffer);
if ((copyBuffer = malloc(sizeCopyBuffer)) == NULL) {
displayMessageAndWaitForKey("Can't allocate that much memory");
return;
}
if (lseek(fd, mark_min, SEEK_SET) == -1 || read(fd, copyBuffer, sizeCopyBuffer) == -1) {
displayMessageAndWaitForKey(strerror(errno));
return;
}
for (p = edited; p; p = p->next) {
if (mark_min < p->base + p->size && p->base <= mark_max) {
int min = MIN(p->base, mark_min);
memcpy(copyBuffer + p->base - min,
p->vals + mark_min - min,
MIN(p->base + p->size, mark_max) - MAX(p->base, mark_min) + 1);
}
}
unmarkAll();
mark_set = FALSE;
}
void yank(void)
{
if (copyBuffer == NULL) { displayMessageAndWaitForKey("Nothing to paste"); return; }
if (isReadOnly) { displayMessageAndWaitForKey("File is read-only!"); return; }
addToEdited(base + cursor, sizeCopyBuffer, copyBuffer);
readFile();
}
void yank_to_a_file(void)
{
char tmp[BLOCK_SEARCH_SIZE];
int f;
if (copyBuffer == NULL) { displayMessageAndWaitForKey("Nothing to paste"); return; }
if (!displayMessageAndGetString("File name (", &lastYankToAFile, tmp)) return;
if ((f = open(tmp, O_RDONLY)) != -1) {
close(f);
displayTwoLineMessage("File exists", "Overwrite it (Yes/No)");
if (tolower(getch()) != 'y') return;
}
if ((f = creat(tmp, 0666)) == -1 || write(f, copyBuffer, sizeCopyBuffer) == -1) {
displayMessageAndWaitForKey(strerror(errno));
return;
}
close(f);
}
void fill_with_string(void)
{
char *msg = hexOrAscii ? "Hexa string to fill with: (" : "Ascii string to fill with: (";
char **last = hexOrAscii ? &lastFillWithStringHexa : &lastFillWithStringAscii;
char *tmp1, tmp2[BLOCK_SEARCH_SIZE];
int i, l1, l2;
if (!mark_set) return;
if (isReadOnly) { displayMessageAndWaitForKey("File is read-only!"); return; }
if (sizeCopyBuffer > BIGGEST_COPYING) {
displayTwoLineMessage("Hey, don't you think that's too big?!", "Really fill (Yes/No)");
if (tolower(getch()) != 'y') return;
}
if (!displayMessageAndGetString(msg, last, tmp2)) return;
l1 = mark_max - mark_min + 1;
l2 = strlen(tmp2);
if (hexOrAscii) {
if (strlen(tmp2) == 1) {
if (!isxdigit(*tmp2)) { displayMessageAndWaitForKey("Invalid hexa string"); return; }
*tmp2 = hexCharToInt(*tmp2);
} else if (!hexStringToBinString(tmp2, &l2)) return;
}
tmp1 = malloc(l1);
for (i = 0; i < l1 - l2 + 1; i += l2) memcpy(tmp1 + i, tmp2, l2);
memcpy(tmp1 + i, tmp2, l1 - i);
addToEdited(mark_min, l1, tmp1);
readFile();
free(tmp1);
}
void updateMarked(void)
{
if (base + cursor > oldbase + oldcursor) {
if (mark_min == mark_max) {
mark_max = base + cursor;
} else if (oldbase + oldcursor == mark_min) {
if (base + cursor <= mark_max) {
mark_min = base + cursor;
unmarkRegion(oldbase + oldcursor, mark_min - 1);
} else {
unmarkRegion(oldbase + oldcursor, mark_max);
mark_min = mark_max;
mark_max = base + cursor;
}
} else {
mark_max = base + cursor;
}
} else if (base + cursor < oldbase + oldcursor){
if (mark_min == mark_max) {
mark_min = base + cursor;
} else if (oldbase + oldcursor == mark_max) {
if (base + cursor >= mark_min) {
mark_max = base + cursor;
unmarkRegion(mark_max + 1, oldbase + oldcursor);
} else {
unmarkRegion(mark_min, oldbase + oldcursor);
markRegion(base + cursor, mark_min - 1);
mark_max = mark_min;
mark_min = base + cursor;
}
} else {
mark_min = base + cursor;
}
}
if (mark_max >= getfilesize()) mark_max = getfilesize() - 1;
markSelectedRegion();
}
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