diff options
| -rw-r--r-- | LICENSE | 341 | ||||
| -rw-r--r-- | Makefile | 41 | ||||
| -rw-r--r-- | README | 25 | ||||
| -rw-r--r-- | xed.1 | 197 | ||||
| -rw-r--r-- | xed.c | 1619 | ||||
| -rw-r--r-- | xedkeys.h | 94 |
6 files changed, 2317 insertions, 0 deletions
@@ -0,0 +1,341 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Library General Public License instead.) You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. 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It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) 19yy <name of author> + + 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 + + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) 19yy name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + <signature of Ty Coon>, 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. + diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..6f12a66 --- /dev/null +++ b/Makefile @@ -0,0 +1,41 @@ +# xed - Simple hex editor +# +# Copyright (C) 2005 Ian Cowburn (ianc@noddybox.demon.co.uk) +# +# 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 +# +# ------------------------------------------------------------------------- +# +# $Id: Makefile,v 1.1.1.1 2005-05-04 01:12:19 ianc Exp $ +# + +# Alter this if required (for instance NCURSES is being used rather than +# a local CURSES). +# +# You may also need to change #include <curses.h> to #include <ncurses.h> +# +LIBS=-lcurses -ltermcap + +OPTS=-g +KEYFILE=xedkeys.h + +xed: xed.c xedkeys.h Makefile + $(CC) $(OPTS) -o xed xed.c $(LIBS) + +xed.txt: xed.1 + nroff -man xed.1 | sed 's/.//g' > xed.txt + +clean: + -rm -f xed core xed.txt @@ -0,0 +1,25 @@ +Build instrcutions +------------------ + +Building xed should be fairly easy on most systems with a semblence of POSIX +compliance as it doesn't use anything too flash. + +You should find in this archive : + + Makefile - makefile + xed.c - The source + xedkeys.h - The keys used. Stored here for easier personalisation. + xed.1 - man page + xed.txt - ASCII version of man page + README - This file + + +To build: + + make + +Then copy xed to a directory on your PATH for ease of use. man.1 can be +installed in /usr/local/man/man1 or your system's equivalent. + +If the make fails, read Makefile for configuration info regarding +curses/ncurses. @@ -0,0 +1,197 @@ +.TH xed 1 +.SH NAME +xed \- CURSES based hex/ASCII file editor +.SH SYNOPSIS +.B xed +[ +.B \-x +] +[ +.B \-i +] +[ +.B \-r +] +[ +.B \-c +] +[ +.B \-R +] +.I filename +.SH DESCRIPTION +.B xed +edits +.I filename +allowing individual bytes to be altered, either as hex or as ASCII. +.SH OPTIONS +.B xed +accepts these switches +.TP +.B \-x +Edit the file directly, rather than a memory based copy. Certain commands are +disabled if this switch is provided (see USAGE). +.TP +.B \-i +Start off in insert mode. +.TP +.B \-r +Start off in regular expression search mode. +.TP +.B \-c +Start off in case insensitive search mode. +.TP +.B \-R +Switch on read only mode (note this mode cannot be toggled whilst in +.B xed +). +.SH USAGE +.B xed +is a simple hex and ASCII based file editor. The display is made up of a +banner, which describes the file being editted; the size of the file (in hex); +the cursor position within the file (in hex); whether you are operating in +overtype or insert mode; whether you are in simple string or regular +expression search mode and the case sensitivity of the search. +.LP +Below the banner is the editting area, with the file offset and hex listing on +the left, and the ASCII on the right. +.LP +.B xed +operates within two modes when editting; hex and ASCII. Below are +the key commands valid in each mode. Note that all the editting, saving and +undo keys are ignored in read-only mode. +.TP +HEX MODE +.TP +Cursors keys +Move around file +.TP +h j k l +As above +.TP +< , ^B +Move back one page +.TP +> . ^F +Move forward one page +.TP +s +Save file (not valid in \-x mode) +.TP +TAB +Switch to ASCII mode +.TP +$ +Move to the end of the file +.TP +^ +Move to the beginning of the file +.TP ++ +Jump to a specified address (Note this address defaults to decimal, but an hex +address can be entered by prefixing the number with '0x', and an octal address +by prefixing with '0') +.TP +R +Restore byte from last saved/initial version (not valid in \-x mode) +.TP +q Q ^C +Quit +.TP +1-9 a-f A-F +Enter Hex value +.TP +^A +Switch between overtype/insert (not valid in \-x mode) +.TP +^T +Switch between normal/regular expression search mode +.TP +^K +Switch between case sensitive/insensitive search mode +.TP +BS DEL +Cancel after first hex digit is entered +.TP +x +Delete character at cursor (not valid in \-x mode) +.TP +/ +Search. In regular expression mode this will treat the file as a set of +text lines, each line terminated with a newline or NULL. +.TP +n +Search next. Note that this will perform the last search, regardless of any +mode change to/from regular expression mode, though it will take account of +changes to case sensitivity. +.TP +^R +Redraw screen +.TP +ASCII MODE +.TP +Cursor keys +Move around file +.TP +^H ^J ^K ^L +As above +.TP +^B +Move back one page +.TP +^F +Move forward one page +.TP +TAB +Switch to HEX mode +.TP +^A +Switch between overtype/insert (not valid in \-x mode) +.TP +^X +Delete character at cursor (not valid in \-x mode) +.TP +^R +Redraw screen +.TP +^C +Quit +.SH ENVIRONMENT +xed will process these environment variables if present +.TP +XEDARG +Allows default arguments to be definied in the environment. If this is set +then invoking +.B xed +will be the same as invoking +.B xed $XEDARG <arglist> +.SH SEE ALSO +.BR od (1) +.BR grep (1) +.BR curses (3) +.BR regexp (3) +.SH DIAGNOSTICS +The diagnostics produced by +.B xed +are intended to be self-explanatory. +.SH NOTES +Version 2.0 of +.B xed +includes these additions and fixes over 1.7 : +.TP +o +Drastically tidied up code to enter the 1990's at least. +.SH BUGS +.TP +o +Even though the input routine tries it's best to mask them, pressing certain +control keys (function keys, etc) while +.B xed +is waiting for the second hex digit when editting can send a string of +unexpected commands to +.B xed. +This may result in your file being accidentally editted and saved. +.TP +o +The display is half-inverted and sometimes corrupts on some HP-UX systems. This +is a bug in their curses implementation. @@ -0,0 +1,1619 @@ +/* + xed - Simple hex editor + + Copyright (C) 2005 Ian Cowburn (ianc@noddybox.demon.co.uk) + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + ------------------------------------------------------------------------- + +*/ +static const char id[]="$Id:"; + +#include <sys/types.h> +#include <curses.h> +#include <stdlib.h> +#include <stdio.h> +#include <fcntl.h> +#include <ctype.h> +#include <signal.h> +#include <stdarg.h> +#include <regex.h> +#include <string.h> + +#include "xedkeys.h" + +#define VERSION "V2.0" +#define USAGE "[-x] [-i] [-r] [-c] [-R] file" + +#define NONE 0 +#define HEX 1 +#define ASCII 2 +#define REGEXP 3 + +#define FILENAME_LEN 25 + +#define GETSTR_LEN 80 +#define GETSTR_DISP_LEN 50 + +#define BUFSIZE(x) ((((x)/1024)+1)*1024) + +#define CTYPE(func,c) (((c>=0)&&(c<=255)) ? func(c) : (c)) +#define CTEST(func,c) (((c>=0)&&(c<=255)) ? func(c) : (FALSE)) + +#define IPBUFFSIZE 1024 + +typedef unsigned char uchar; + +char *name; +char *filename; +char print_name[FILENAME_LEN+1]; +uchar *edit; +uchar *mirror; +long bufsize; +int in_place=FALSE; +int regexp=FALSE; +int casesense=TRUE; +int readonly=FALSE; +int fd; +long file_len; +long page_ptr; +long file_ptr; +long end_page; +long page_depth; +int edit_hex=TRUE; +int overtype=TRUE; +int editted=FALSE; + +int last_search=NONE; +char sch_str[GETSTR_LEN]; +int sch_hex[128]; +int sch_no; + +regex_t re; +int re_alloc=FALSE; + +/* Function prototypes +*/ +void Err(const char *s); +void SysErr(const char *p); +void MainCode(void); +int HandleKey(int key); +int HandleKeyHex(int key); +void HandleKeyAscii(int key); +int CompileRegExp(void); +void SearchRegExp(void); +void DoSearchRegExp(void); +void SearchString(void); +void DoSearchString(void); +void SearchHex(void); +void DoSearchHex(void); +int Read(int fd, void *buff, int no); +int Write(int fd, void *buff, int no); +void OpenFile(void); +void SaveFile(void); +int CalcHex(int x[]); +int GetByte(long cur); +char *GetByteString(long *cur, int all_lower); +int GetLastSaved(long cur); +void Display(void); +void PartialDisplay(long cur, int x, int y); +void InsertValue(long p,long b); +void DeleteValue(long p); +void ReplaceValue(long p,long b); +void UpdateValue(long p, int b); +void ShowCursor(void); +void ShowPos(void); +int ScanKey(void); +int GetKey(int allkeys); +void GetString(char s[]); +char *Get(char *p); +int GetChar(char *p, char *v); +void Message(const char *fmt, ...); +char *Tail(char s[], int l); + + +int main(int argc, char *argv[]) +{ + char *env,*arg,*list[256]; /* If you're that prepared to break it, you */ + int listc; /* DESERVE to get a segmentation fault */ + int src,dest,f; + + name=argv[0]; + + /* Prepend XEDARG variable if present + */ + src=0; + dest=0; + if (env=getenv("XEDARG")) + { + arg=strtok(env," \t"); + + while(arg) + { + list[dest++]=arg; + arg=strtok(NULL," \t"); + } + } + + for(f=1;f<argc;f++) + list[dest++]=argv[f]; + + listc=dest; + + if (listc<1) + { + fprintf(stderr,"%s:usage %s %s\n",name,name,USAGE); + exit(EXIT_FAILURE); + } + + f=0; + while(*list[f]=='-') + { + switch (*(list[f]+1)) + { + case 'x': + in_place=TRUE; + break; + case 'i': + overtype=FALSE; + break; + case 'r': + regexp=TRUE; + break; + case 'c': + casesense=FALSE; + break; + case 'R': + readonly=TRUE; + break; + default: + fprintf(stderr,"%s:usage %s %s\n",name,name,USAGE); + exit(EXIT_FAILURE); + break; + } + f++; + + if (f==listc) + { + fprintf(stderr,"%s:usage %s %s\n",name,name,USAGE); + exit(EXIT_FAILURE); + } + } + + filename=list[f]; + + strcpy(print_name,Tail(filename,FILENAME_LEN)); + + signal(SIGINT,SIG_IGN); + + initscr(); + cbreak(); + noecho(); + keypad(stdscr,TRUE); + + MainCode(); + + erase(); + refresh(); + + if (in_place) + if (close(fd)==-1) + SysErr(filename); + + endwin(); + + return EXIT_SUCCESS; +} + + +void Err(const char *s) +{ + endwin(); + + fprintf(stderr,"%s: %s\n",name,s); + exit(EXIT_FAILURE); +} + + +void SysErr(const char *p) +{ + endwin(); + + if (p) + perror(p); + else + perror(name); + + exit(EXIT_FAILURE); +} + + +void MainCode(void) +{ + char errstr[80]; + int quit=FALSE; + int ch; + + if (COLS<80) + { + sprintf + (errstr, + "Terminal width (%d) less than required minimum (80)",COLS); + Err(errstr); + } + + if (LINES<10) + { + sprintf + (errstr, + "Terminal depth (%d) less than required minimum (10)",LINES); + Err(errstr); + } + + OpenFile(); + + file_ptr=page_ptr=0L; + + Display(); + + Message(VERSION); + ShowCursor(); + + while(!quit) + { + switch (HandleKey(GetKey(TRUE))) + { + case FALSE: + if ((editted)&&(!in_place)) + { + ch=GetChar + ("File has been editted. Quit (y/[n])?","yYnN\n"); + + if ((ch=='y')||(ch=='Y')) + quit=TRUE; + } + else + quit=TRUE; + + break; + case TRUE: + break; + } + } +} + + +int HandleKey(int key) +{ + int finished; + + if (edit_hex) + { + HandleKeyHex(key); + return ((key!='q')&&(key!='Q')&&(key!=3)); + } + else + { + HandleKeyAscii(key); + return (key!=3); + } +} + + +int HandleKeyHex(int key) +{ + char *s; + int hex[2],next_key,old_val; + int ch; + + switch(key) + { + case CURS_UP1: + case CURS_UP2: + if (file_ptr>15) + { + file_ptr-=16; + + if (file_ptr<page_ptr) + { + page_ptr-=16; + + if (page_ptr<0) + page_ptr=0; + + Display(); + } + else + ShowCursor(); + } + break; + + case CURS_LEFT1: + case CURS_LEFT2: + if (file_ptr) + { + file_ptr--; + + if (file_ptr<page_ptr) + { + page_ptr-=16; + + if (page_ptr<0) + page_ptr=0; + + Display(); + } + else + ShowCursor(); + } + break; + + case CURS_DOWN1: + case CURS_DOWN2: + case '\n': + if (file_ptr<(file_len-1)) + { + file_ptr+=16; + + if (file_ptr>(file_len-1)) + file_ptr=file_len-1; + + if (file_ptr>end_page) + { + page_ptr+=16; + Display(); + } + else + ShowCursor(); + } + break; + + case CURS_RIGHT1: + case CURS_RIGHT2: + if (file_ptr<(file_len-1)) + { + file_ptr++; + + if (file_ptr>end_page) + { + page_ptr+=16; + Display(); + } + else + ShowCursor(); + } + break; + + case PAGE_BACK1: + case PAGE_BACK2: + case PAGE_BACK3: + if (file_ptr>=page_depth) + { + page_ptr-=page_depth; + + if (page_ptr<0) + page_ptr=0; + + file_ptr-=page_depth; + + Display(); + } + break; + + case PAGE_FWD1: + case PAGE_FWD2: + case PAGE_FWD3: + if (page_ptr<=file_len-page_depth-1) + { + page_ptr+=page_depth; + + file_ptr+=page_depth; + + if (file_ptr>(file_len-1)) + file_ptr=file_len-1; + + Display(); + } + break; + + case SWITCH_TO_ASCII: + edit_hex=FALSE; + ShowCursor(); + break; + + case START_OF_FILE: + page_ptr=file_ptr=0L; + Display(); + break; + + case END_OF_FILE: + page_ptr=file_len-page_depth; + + if (page_ptr<0) + page_ptr=0; + + file_ptr=file_len-1; + Display(); + break; + + case JUMP_TO: + s=Get("Address to jump to (prefix with 0x for hex) : "); + + page_ptr=strtol(s,(char **)NULL,0); + + if (page_ptr<0) + page_ptr=0; + + if (page_ptr>=file_len) + page_ptr=file_len-1; + + file_ptr=page_ptr; + + if ((page_ptr>file_len-page_depth)&&(page_depth<file_len)) + { + page_ptr=file_len-page_depth; + + if (page_ptr<0) + page_ptr=0; + } + + Display(); + + break; + + case SAVE: + if (!readonly) + { + if (!in_place) + { + SaveFile(); + + editted=FALSE; + } + else + Message("All changes already saved in -x mode!"); + } + else + Message("File is read-only!"); + + ShowCursor(); + break; + + case RESTORE_BYTE: + if (!readonly) + { + if (!in_place) + { + if (file_len) + { + ReplaceValue + (file_ptr,(uchar)GetLastSaved(file_ptr)); + + if (file_ptr<(file_len)-1) + { + file_ptr++; + + if (file_ptr>end_page) + { + page_ptr+=16; + Display(); + } + else + ShowCursor(); + } + } + } + else + Message("Can't recover in -x mode!"); + } + else + Message("File is read-only!"); + + ShowCursor(); + break; + + case REFRESH: + Display(); + break; + + case INSERT_TOGGLE: + if (!readonly) + if (in_place) + { + Message("no insert/delete in -x mode"); + ShowCursor(); + } + else + { + overtype=!overtype; + ShowPos(); + ShowCursor(); + } + break; + + case DELETE_CHAR: + if (!readonly) + { + if (in_place) + Message("no insert/delete in -x mode"); + else + if (file_len) + { + editted=TRUE; + + DeleteValue(file_ptr); + + if ((file_ptr>=file_len)&&(file_len)) + if (--file_ptr<page_ptr) + page_ptr=file_ptr; + + Display(); + } + } + else + Message ("File is read-only!"); + + ShowCursor(); + break; + + case FIND_STRING: + if (!regexp) + { + ch=GetChar("(S)tring or (N)umber search ? ","sSnN\n"); + + if ((ch=='N')||(ch=='n')) + { + SearchHex(); + Display(); + } + else + { + if ((ch=='S')||(ch=='s')) + { + SearchString(); + Display(); + } + else + ShowCursor(); + } + } + else + { + SearchRegExp(); + + if (last_search==REGEXP) + Display(); + else + ShowCursor(); + } + + break; + + case FIND_NEXT: + switch (last_search) + { + case NONE: + Message("No previous search!"); + ShowCursor(); + break; + case HEX: + DoSearchHex(); + Display(); + break; + case ASCII: + DoSearchString(); + Display(); + break; + case REGEXP: + DoSearchRegExp(); + Display(); + break; + } + break; + + case FIND_TYPE: + regexp=!regexp; + ShowCursor(); + break; + + case FIND_CASE: + casesense=!casesense; + + if (last_search==REGEXP) + CompileRegExp(); + + ShowCursor(); + break; + + default: + if (!readonly) + { + if (CTEST(isxdigit,key)) + { + old_val=GetByte(file_ptr); + + hex[0]=CTYPE(toupper,key); + + addch(hex[0]); + refresh(); + + next_key=GetKey(FALSE); + + while ((!CTEST(isxdigit,next_key))&& + (next_key!=8)&&(next_key!=127)) + next_key=GetKey(FALSE); + + hex[1]=CTYPE(toupper,next_key); + + if (CTEST(isxdigit,next_key)) + { + editted=TRUE; + + UpdateValue(file_ptr,CalcHex(hex)); + + /* Special case for the first char in an empty file */ + if (file_len==0) + file_len=1; + + if (file_ptr<(file_len)-1) + { + file_ptr++; + + if (file_ptr>end_page) + { + page_ptr=file_ptr; + Display(); + } + else + ShowCursor(); + } + else + ShowCursor(); + } + else + { + if (!overtype) + ReplaceValue(file_ptr,old_val); + else + UpdateValue(file_ptr,old_val); + + ShowCursor(); + } + } + } + break; + } +} + + +void HandleKeyAscii(int key) +{ + switch(key) + { + case ASC_CURS_UP1: + case ASC_CURS_UP2: + if (file_ptr>15) + { + file_ptr-=16; + + if (file_ptr<page_ptr) + { + page_ptr-=16; + + if (page_ptr<0) + page_ptr=0; + + Display(); + } + else + ShowCursor(); + } + break; + + case ASC_CURS_LEFT1: + case ASC_CURS_LEFT2: + if (file_ptr) + { + file_ptr--; + + if (file_ptr<page_ptr) + { + page_ptr-=16; + + if (page_ptr<0) + page_ptr=0; + + Display(); + } + else + ShowCursor(); + } + break; + + case ASC_CURS_DOWN1: + case ASC_CURS_DOWN2: + if (file_ptr<(file_len-1)) + { + file_ptr+=16; + + if (file_ptr>(file_len-1)) + file_ptr=file_len-1; + + if (file_ptr>end_page) + { + page_ptr+=16; + Display(); + } + else + ShowCursor(); + } + break; + + case ASC_CURS_RIGHT1: + case ASC_CURS_RIGHT2: + if (file_ptr<(file_len)-1) + { + file_ptr++; + + if (file_ptr>end_page) + { + page_ptr+=16; + Display(); + } + else + ShowCursor(); + } + break; + + case ASC_PAGE_BACK: + if (file_ptr>=page_depth) + { + page_ptr-=page_depth; + + if (page_ptr<0) + page_ptr=0; + + file_ptr-=page_depth; + + Display(); + } + break; + + case ASC_PAGE_FWD: + if (page_ptr<=file_len-page_depth-1) + { + page_ptr+=page_depth; + + file_ptr+=page_depth; + + if (file_ptr>(file_len-1)) + file_ptr=file_len-1; + + Display(); + } + break; + + case ASC_REFRESH: + Display(); + break; + + case SWITCH_TO_HEX: + edit_hex=TRUE; + ShowCursor(); + break; + + case INSERT_TOGGLE: + if (!readonly) + if (in_place) + { + Message("no insert/delete in -x mode"); + ShowCursor(); + } + else + { + overtype=!overtype; + ShowPos(); + ShowCursor(); + } + break; + + case ASC_DELETE_CHAR: + if (!readonly) + { + if (in_place) + Message("no insert/delete in -x mode"); + else + if (file_len) + { + DeleteValue(file_ptr); + + if ((file_ptr>=file_len)&&(file_len)) + if (--file_ptr<page_ptr) + page_ptr=file_ptr; + + Display(); + } + } + else + Message ("File is read-only!"); + + ShowCursor(); + break; + + default: + if (!readonly) + if (CTEST(isprint,key)) + { + editted=TRUE; + + UpdateValue(file_ptr,key); + + /* Special case for the first char in an empty file */ + if (file_len==0) + file_len=1; + + if (file_ptr<(file_len)-1) + { + file_ptr++; + + if (file_ptr>end_page) + { + page_ptr=file_ptr; + Display(); + } + else + ShowCursor(); + } + else + ShowCursor(); + } + break; + } +} + +int CompileRegExp(void) +{ + char buff[80]; + int ret; + + if (re_alloc) + regfree(&re); + + re_alloc=FALSE; + + if (casesense) + ret=regcomp(&re,sch_str,REG_EXTENDED|REG_NEWLINE); + else + ret=regcomp(&re,sch_str,REG_EXTENDED|REG_ICASE|REG_NEWLINE); + + if(ret!=0) + { + regerror(ret,&re,buff,80); + Message ("RE error : %s",buff); + return (FALSE); + } + + re_alloc=TRUE; + + return TRUE; +} + +void SearchRegExp(void) +{ + last_search=NONE; + + strcpy(sch_str,Get("/")); + + if (!strlen(sch_str)) + return; + + if (CompileRegExp()) + { + last_search=REGEXP; + DoSearchRegExp(); + } +} + +void DoSearchRegExp(void) +{ + char *p; + long f,of; + regmatch_t re_match; + + Message("Searching...."); + + f=file_ptr+1; + + of=f; + p=GetByteString(&f,!casesense); + while(p) + { + if (regexec(&re,p,1,&re_match,0)==0) + { + file_ptr=of+re_match.rm_so; + + if ((file_ptr<page_ptr)||(file_ptr>end_page)) + page_ptr=file_ptr; + + free(p); + return; + } + + free(p); + of=f; + p=GetByteString(&f,!casesense); + } + + Message("Not found. Press a key."); + GetKey(TRUE); + Message(""); +} + + +void SearchString(void) +{ + last_search=NONE; + + strcpy(sch_str,Get("Search string : ")); + + if (!strlen(sch_str)) + return; + + last_search=ASCII; + + DoSearchString(); +} + + +void DoSearchString(void) +{ + long f; + int l,r; + + Message("Searching...."); + + l=strlen(sch_str); + + for(f=file_ptr+1;f<file_len-l+1;f++) + { + for(r=0;r<l;r++) + if (casesense) + { + if (GetByte(f+r)!=sch_str[r]) + r=l+1; + } + else + { + if (tolower(GetByte(f+r))!=tolower(sch_str[r])) + r=l+1; + } + + if (r==l) + { + file_ptr=f; + + if ((file_ptr<page_ptr)||(file_ptr>end_page)) + page_ptr=file_ptr; + + return; + } + } + + Message("Not found. Press a key."); + GetKey(TRUE); + Message(""); +} + + +void SearchHex(void) +{ + char *s; + + last_search=NONE; + sch_no=0; + + s=Get("Enter First number (return to quit) : "); + + while(*s) + { + sch_hex[sch_no++]=(int)strtol(s,(char **)NULL,0); + s=Get("Enter next number (return to finish) : "); + } + + if (!sch_no) + return; + + last_search=HEX; + + DoSearchHex(); +} + + +void DoSearchHex(void) +{ + int f,r; + + Message("Searching...."); + + for(f=file_ptr+1;f<file_len-sch_no+1;f++) + { + for(r=0;r<sch_no;r++) + if (GetByte(f+r)!=sch_hex[r]) + r=sch_no+1; + + if (r==sch_no) + { + file_ptr=f; + + if ((file_ptr<page_ptr)||(file_ptr>end_page)) + page_ptr=file_ptr; + + return; + } + } + + Message("Not found. Press a key"); + GetKey(TRUE); + Message(""); +} + + +/* Provide a skin to read(2) and write(2) +*/ +int Read(int fd, void *buff, int no) +{ + int tot,rd; + + tot=0; + while(tot<no) + { + rd=read(fd,buff+tot,no-tot); + + /* If we read zero bytes, it's probably the end of the file. + */ + if (rd==0) + return tot; + + /* Reading -1 leaves little room for argument! + */ + if (rd==-1) + return -1; + + tot+=rd; + } + + return tot; +} + + +int Write(int fd, void *buff, int no) +{ + int tot,wr; + + tot=0; + while(tot<no) + { + wr=write(fd,buff+tot,no-tot); + + if ((wr==-1)||(wr==0)) + return -1; + + tot+=wr; + } + + return tot; +} + + +void OpenFile(void) +{ + if (readonly) + { + if ((fd=open(filename,O_RDONLY))==-1) + SysErr(filename); + } + else + { + if ((fd=open(filename,O_RDWR))==-1) + SysErr(filename); + } + + if ((file_len=lseek(fd,0L,SEEK_END))==-1) + SysErr(filename); + + lseek(fd,0L,SEEK_SET); + + if (!in_place) + { + if (!(edit=(uchar *)malloc(bufsize=BUFSIZE(file_len)))) + SysErr(NULL); + + if (!(mirror=(uchar *)malloc(bufsize))) + SysErr(NULL); + + if (Read(fd,edit,file_len)!=file_len) + SysErr(filename); + + memcpy(mirror,edit,file_len); + + close(fd); + } +} + + +void SaveFile(void) +{ + Message("Writing..."); + + if((fd=open(filename,O_WRONLY|O_TRUNC))==-1) + SysErr(filename); + + if (Write(fd,edit,file_len)!=file_len) + SysErr(filename); + + close(fd); + + memcpy(mirror,edit,file_len); + + Message("Done"); +} + + +int CalcHex(int x[]) +{ + static char hex_digits[]="0123456789ABCDEF"; + + int h,l; + + for(h=0;(h<16)&&(x[0]!=hex_digits[h]);h++); + for(l=0;(l<16)&&(x[1]!=hex_digits[l]);l++); + + if ((h==16)||(l==16)) + Err("CalcHex() broken!"); + + return(h*16+l); +} + + +int GetByte(long cur) +{ + static uchar ipbuff[IPBUFFSIZE]; + static long buffpos; + static int first_read=TRUE; + uchar c; + + if (cur>=file_len) + return -1; + + if(!in_place) + return edit[cur]; + + if (first_read) + first_read=FALSE; + else + if ((cur>=buffpos)&&(cur<buffpos+IPBUFFSIZE)) + return ipbuff[cur-buffpos]; + + if (lseek(fd,cur,SEEK_SET)==-1) + SysErr(filename); + + if(Read(fd,ipbuff,IPBUFFSIZE)==-1) + SysErr(filename); + + buffpos=cur; + + return ipbuff[cur-buffpos]; +} + + +char *GetByteString(long *cur, int all_lower) +{ + char *p; + long l,cp; + int b; + + cp=*cur; + + if (cp>=file_len) + return NULL; + + l=0; + + while(((b=GetByte(cp++))!=-1)&&(b!=0)&&(b!='\n')) + l++; + + if (!l) + { + if (!(p=(char *)malloc(0x1))) + SysErr(NULL); + *p=0; + *cur+=1; + return p; + } + + if (!(p=(char *)malloc((int)l+1))) + SysErr(NULL); + + for(cp=0;cp<l;cp++) + *(p+cp)=(all_lower) ? (tolower(GetByte((*cur)+cp))) : + (GetByte((*cur)+cp)); + + *(p+cp)=0; + + *cur+=l+1; + + return p; +} + + +int GetLastSaved(long cur) +{ + return (int)mirror[cur]; +} + + +void Display(void) +{ + int r,f,b; + long cur; + + erase(); + + mvprintw(0,0,"File : %s",print_name); + + r=3; + cur=page_ptr; + + while(r<LINES-3) + { + mvprintw(r,0,"%8.8X :",cur); + + for(f=0;f<16;f++) + if ((b=GetByte(cur++))==-1) + mvaddstr(r,11+f*3,"**"); + else + { + mvprintw(r,11+f*3,"%2.2X",(uchar)b); + + if ((b<32)||(b>126)) + mvaddch(r,62+f,(chtype)'.'); + else + mvaddch(r,62+f,(chtype)b); + } + r++; + } + + end_page=cur-1; + page_depth=end_page-page_ptr+1; + + ShowCursor(); +} + + +void PartialDisplay(long cur, int x, int y) +{ + int r,f,b; + + r=y; + + while(r<LINES-3) + { + if (!x) + mvprintw(r,0,"%8.8X :",cur); + + for(f=x;f<16;f++) + if ((b=GetByte(cur++))==-1) + mvaddstr(r,11+f*3,"**"); + else + { + mvprintw(r,11+f*3,"%2.2X",(uchar)b); + + if ((b<32)||(b>126)) + mvaddch(r,62+f,(chtype)'.'); + else + mvaddch(r,62+f,(chtype)b); + } + + x=0; + r++; + } +} + + +void InsertValue(long p,long b) +{ + if (++file_len>bufsize) + { + if (!(edit=(uchar *)realloc(edit,(bufsize=BUFSIZE(file_len))))) + SysErr(NULL); + + if (!(mirror=(uchar *)realloc(mirror,bufsize))) + SysErr(NULL); + } + + memmove(edit+p+1,edit+p,file_len-p-1); + memmove(mirror+p+1,mirror+p,file_len-p-1); + + edit[p]=(uchar)b; + mirror[p]=(uchar)b; +} + + +void DeleteValue(long p) +{ + if (file_len>1) + { + memmove(edit+p,edit+p+1,file_len-p-1); + memmove(mirror+p,mirror+p+1,file_len-p-1); + + file_len--; + } + else + file_len=0; +} + + +void ReplaceValue(long p,long b) +{ + int x,y; + uchar c=b; + + edit[p]=(uchar)b; + + y=3+(p-page_ptr)/16; + x=(p-page_ptr)%16; + + mvprintw(y,11+x*3,"%2.2X",(uchar)b); + + if ((b<32)||(b>126)) + mvaddch(y,62+x,(chtype)'.'); + else + mvaddch(y,62+x,(chtype)b); +} + + +void UpdateValue(long p, int b) +{ + int x,y; + uchar c=b; + + if (!in_place) + { + if (overtype) + edit[p]=(uchar)b; + else + InsertValue(p,b); + } + else + { + lseek(fd,p,SEEK_SET); + if (Write(fd,&c,1)==-1) + SysErr(filename); + } + + y=3+(p-page_ptr)/16; + x=(p-page_ptr)%16; + + if (overtype) + { + mvprintw(y,11+x*3,"%2.2X",(uchar)b); + + if ((b<32)||(b>126)) + mvaddch(y,62+x,(chtype)'.'); + else + mvaddch(y,62+x,(chtype)b); + } + else + PartialDisplay(p,x,y); +} + + +void ShowCursor(void) +{ + int x,y; + + ShowPos(); + + y=(file_ptr-page_ptr)/16; + x=(file_ptr-page_ptr)%16; + + if (edit_hex) + move(3+y,11+x*3); + else + move(3+y,62+x); + + refresh(); +} + + +void ShowPos(void) +{ + mvprintw(1,0,"Pos : %8.8x",file_ptr); + mvprintw(0,40,"File size : %8.8x",file_len); + + /* Print Status line */ + if (readonly) + mvaddstr(1,20,"READ ONLY"); + else + if (overtype) + mvaddstr(1,20,"OVERTYPE"); + else + mvaddstr(1,20," INSERT "); + + if (regexp) + mvaddstr(1,37,"REGEXP SEARCH"); + else + mvaddstr(1,37,"STRING SEARCH"); + + if (casesense) + mvaddstr(1,57," CASE SENSITIVE "); + else + mvaddstr(1,57,"CASE INSENSITIVE"); +} + + +int ScanKey(void) +{ + int k; + + k=getch(); + + if (k==KEY_BACKSPACE) + k=8; + + if (k==ERR) + k=3; + + /* Message("Read key %9d",k); */ + + return k; +} + + +int GetKey(int allkeys) +{ + int k; + + k=ScanKey(); + + if (!allkeys) + while(!CTEST(isascii,k)) + k=ScanKey(); + + return k; +} + + +void GetString(char s[]) +{ + int k,done,p,x,y; + + done=FALSE; + p=0; + s[p]=0; + getyx(stdscr,y,x); + + while(!done) + { + mvprintw(y,x,"%-*.*s",GETSTR_DISP_LEN,GETSTR_DISP_LEN, + Tail(s,GETSTR_DISP_LEN)); + + move(y,x+((p>=GETSTR_DISP_LEN) ? (GETSTR_DISP_LEN) : (p))); + + refresh(); + + switch (k=GetKey(TRUE)) + { + case 8: + case 127: + if (p) + s[--p]=0; + break; + + case 3: + strcpy(s,""); + done=TRUE; + break; + + case '\n': + done=TRUE; + break; + + default: + if (p<GETSTR_LEN-1) + { + s[p++]=(char)k; + s[p]=0; + } + else + flash(); + } + } +} + + +char *Get(char *p) +{ + static char s[GETSTR_LEN]; + int f; + + Message(p); + + echo(); + GetString(s); + noecho(); + + return s; +} + + +int GetChar(char *p, char *v) +{ + int f,ch=0xff; + + Message(p); + + while(!strchr(v,ch)) + ch=GetKey(TRUE); + + ShowCursor(); + + return ch; +} + + +void Message(const char *fmt, ...) +{ + va_list arg; + int f; + + move(LINES-1,0); + + for(f=0;f<COLS-2;f++) + addch(' '); + + va_start(arg,fmt); + mvwprintw(stdscr,LINES-1,0,fmt,arg); + va_end(arg); + + refresh(); +} + + +char *Tail(char s[], int l) +{ + static char ret[1024]; + int sl,d; + + if(strlen(s)<=l) + strcpy(ret,s); + else + { + sl=strlen(s); + d=l; + + while(d>-1) + ret[d--]=s[sl--]; + + ret[0]='.'; + ret[1]='.'; + } + + return ret; +} + + +/* END OF FILE */ diff --git a/xedkeys.h b/xedkeys.h new file mode 100644 index 0000000..6ecd189 --- /dev/null +++ b/xedkeys.h @@ -0,0 +1,94 @@ +/* + xed - Simple hex editor + + Copyright (C) 2005 Ian Cowburn (ianc@noddybox.demon.co.uk) + + 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 file detailing the keys in xed + + $Id$ +*/ + +#ifndef XEDKEYS_H +#define XEDKEYS_H + +/* To define control codes */ +#define CNTL(x) ((x)-'@') + +/* Keys valid in HEX mode */ + +#define CURS_UP1 KEY_UP +#define CURS_UP2 'k' +#define CURS_DOWN1 KEY_DOWN +#define CURS_DOWN2 'j' +#define CURS_LEFT1 KEY_LEFT +#define CURS_LEFT2 'h' +#define CURS_RIGHT1 KEY_RIGHT +#define CURS_RIGHT2 'l' + +#define PAGE_FWD1 '>' +#define PAGE_FWD2 '.' +#define PAGE_FWD3 CNTL('F') + +#define PAGE_BACK1 '<' +#define PAGE_BACK2 ',' +#define PAGE_BACK3 CNTL('B') + +#define SWITCH_TO_ASCII '\t' + +#define START_OF_FILE '^' +#define END_OF_FILE '$' +#define JUMP_TO '+' + +#define SAVE 's' + +#define RESTORE_BYTE 'R' + +#define REFRESH CNTL('R') + +#define INSERT_TOGGLE CNTL('A') + +#define DELETE_CHAR 'x' + +#define FIND_STRING '/' +#define FIND_NEXT 'n' +#define FIND_TYPE CNTL('T') +#define FIND_CASE CNTL('K') + + +/* Keys valid in ASCII mode */ + +#define ASC_CURS_UP1 KEY_UP +#define ASC_CURS_UP2 CNTL('K') +#define ASC_CURS_DOWN1 KEY_DOWN +#define ASC_CURS_DOWN2 CNTL('J') +#define ASC_CURS_LEFT1 KEY_LEFT +#define ASC_CURS_LEFT2 CNTL('H') +#define ASC_CURS_RIGHT1 KEY_RIGHT +#define ASC_CURS_RIGHT2 CNTL('L') + +#define ASC_PAGE_FWD CNTL('F') +#define ASC_PAGE_BACK CNTL('B') + +#define ASC_REFRESH (REFRESH) + +#define SWITCH_TO_HEX (SWITCH_TO_ASCII) + +#define ASC_DELETE_CHAR CNTL('X') + +#endif |