mark.c

   1 /* hexedit -- Hexadecimal Editor for Binary Files
   2    Copyright (C) 1998 Pixel (Pascal Rigaux)
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.*/
  17 #include "hexedit.h"
  18
  19 /*******************************************************************************/
  20 /* Mark functions */
  21 /*******************************************************************************/
  22 void markRegion(off_t a, off_t b) { int i; for (i = MAX(a - base, 0); i <= MIN(b - base, nbBytes - 1); i++) markIt(i); }
  23 void unmarkRegion(off_t a, off_t b) { int i; for (i = MAX(a - base, 0); i <= MIN(b - base, nbBytes - 1); i++) unmarkIt(i); }
  24 void markSelectedRegion(void) { markRegion(mark_min, mark_max); }
  25 void unmarkAll(void) { unmarkRegion(base, base + nbBytes - 1); }
  26 void markIt(int i) { bufferAttr[i] |= MARKED; }
  27 void unmarkIt(int i) { bufferAttr[i] &= ~MARKED; }
  28
  29 void copy_region(void)
  30 {
  31   typePage *p;
  32
  33   if (!mark_set) { displayMessageAndWaitForKey("Nothing to copy"); return; }
  34   sizeCopyBuffer = mark_max - mark_min + 1;
  35   if (sizeCopyBuffer == 0) return;
  36   if (sizeCopyBuffer > BIGGEST_COPYING) {
  37     displayTwoLineMessage("Hey, don't you think that's too big?!", "Really copy (Yes/No)");
  38     if (tolower(getch()) != 'y') return;
  39   }
  40   FREE(copyBuffer);
  41   if ((copyBuffer = malloc(sizeCopyBuffer)) == NULL) {
  42     displayMessageAndWaitForKey("Can't allocate that much memory");
  43     return;
  44   }
  45   if (LSEEK_(fd, mark_min) == -1 || read(fd, copyBuffer, sizeCopyBuffer) == -1) {
  46     displayMessageAndWaitForKey(strerror(errno));
  47     return;
  48   }
  49
  50   for (p = edited; p; p = p->next) {
  51     if (mark_min < p->base + p->size && p->base <= mark_max) {
  52       off_t min = MIN(p->base, mark_min);
  53       memcpy(copyBuffer + p->base - min,
  54              p->vals + mark_min - min,
  55              MIN(p->base + p->size, mark_max) - MAX(p->base, mark_min) + 1);
  56     }
  57   }
  58   unmarkAll();
  59   mark_set = FALSE;
  60 }
  61
  62 void yank(void)
  63 {
  64   if (copyBuffer == NULL) { displayMessageAndWaitForKey("Nothing to paste"); return; }
  65   if (isReadOnly) { displayMessageAndWaitForKey("File is read-only!"); return; }
  66   addToEdited(base + cursor, sizeCopyBuffer, copyBuffer);
  67   readFile();
  68 }
  69
  70 void yank_to_a_file(void)
  71 {
  72   char tmp[BLOCK_SEARCH_SIZE];
  73   int f;
  74
  75   if (copyBuffer == NULL) { displayMessageAndWaitForKey("Nothing to paste"); return; }
  76
  77   if (!displayMessageAndGetString("File name: ", &lastYankToAFile, tmp, sizeof(tmp))) return;
  78
  79   if ((f = open(tmp, O_RDONLY)) != -1) {
  80     close(f);
  81     displayTwoLineMessage("File exists", "Overwrite it (Yes/No)");
  82     if (tolower(getch()) != 'y') return;
  83   }
  84   if ((f = creat(tmp, 0666)) == -1 || write(f, copyBuffer, sizeCopyBuffer) == -1) {
  85     displayMessageAndWaitForKey(strerror(errno));
  86   }
  87
  88   if (f != -1) close(f);
  89 }
  90
  91 void fill_with_string(void)
  92 {
  93   char *msg = hexOrAscii ? "Hexa string to fill with: " : "Ascii string to fill with: ";
  94   char **last = hexOrAscii ? &lastFillWithStringHexa : &lastFillWithStringAscii;
  95   char tmp2[BLOCK_SEARCH_SIZE];
  96   unsigned char *tmp1;
  97   size_t i, l1, l2;
  98
  99   if (!mark_set) return;
 100   if (isReadOnly) { displayMessageAndWaitForKey("File is read-only!"); return; }
 101   if (sizeCopyBuffer > BIGGEST_COPYING) {
 102     displayTwoLineMessage("Hey, don't you think that's too big?!", "Really fill (Yes/No)");
 103     if (tolower(getch()) != 'y') return;
 104   }
 105   if (!displayMessageAndGetString(msg, last, tmp2, sizeof(tmp2))) return;
 106   l1 = mark_max - mark_min + 1;
 107   l2 = strlen(tmp2);
 108   if (hexOrAscii) {
 109     if (l2 == 1) {
 110       if (!isxdigit(*tmp2)) { displayMessageAndWaitForKey("Invalid hexa string"); return; }
 111       *tmp2 = hexCharToInt(*tmp2);
 112     } else if (!hexStringToBinString(tmp2, &l2)) return;
 113   }
 114   tmp1 = malloc(l1);
 115   if(!tmp1) return;
 116   for (i = 0; i < l1 - l2 + 1; i += l2) memcpy(tmp1 + i, tmp2, l2);
 117   memcpy(tmp1 + i, tmp2, l1 - i);
 118   addToEdited(mark_min, l1, tmp1);
 119   readFile();
 120   free(tmp1);
 121 }
 122
 123
 124 void updateMarked(void)
 125 {
 126   if (base + cursor > oldbase + oldcursor) {
 127
 128     if (mark_min == mark_max) {
 129       mark_max = base + cursor;
 130     } else if (oldbase + oldcursor == mark_min) {
 131       if (base + cursor <= mark_max) {
 132         mark_min = base + cursor;
 133         unmarkRegion(oldbase + oldcursor, mark_min - 1);
 134       } else {
 135         unmarkRegion(oldbase + oldcursor, mark_max);
 136         mark_min = mark_max;
 137         mark_max = base + cursor;
 138       }
 139     } else {
 140       mark_max = base + cursor;
 141     }
 142
 143   } else if (base + cursor < oldbase + oldcursor){
 144     if (mark_min == mark_max) {
 145       mark_min = base + cursor;
 146     } else if (oldbase + oldcursor == mark_max) {
 147       if (base + cursor >= mark_min) {
 148         mark_max = base + cursor;
 149         unmarkRegion(mark_max + 1, oldbase + oldcursor);
 150       } else {
 151         unmarkRegion(mark_min, oldbase + oldcursor);
 152         markRegion(base + cursor, mark_min - 1);
 153         mark_max = mark_min;
 154         mark_min = base + cursor;
 155       }
 156     } else {
 157       mark_min = base + cursor;
 158     }
 159   }
 160   if (mark_max >= getfilesize()) mark_max = getfilesize() - 1;
 161   markSelectedRegion();
 162 }