/* vi: set sw=4 ts=4: */ /* * tiny vi.c: A small 'vi' clone * Copyright (C) 2000, 2001 Sterling Huxley * * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. */ /* * Things To Do: * EXINIT * $HOME/.exrc and ./.exrc * add magic to search /foo.*bar * add :help command * :map macros * if mark[] values were line numbers rather than pointers * it would be easier to change the mark when add/delete lines * More intelligence in refresh() * ":r !cmd" and "!cmd" to filter text through an external command * A true "undo" facility * An "ex" line oriented mode- maybe using "cmdedit" */ #include "busybox.h" #define ENABLE_FEATURE_VI_CRASHME 0 #if ENABLE_LOCALE_SUPPORT #define Isprint(c) isprint((c)) #else /* 0x9b is Meta-ESC */ #define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b) #endif #define MAX_SCR_COLS BUFSIZ // Misc. non-Ascii keys that report an escape sequence #define VI_K_UP (char)128 // cursor key Up #define VI_K_DOWN (char)129 // cursor key Down #define VI_K_RIGHT (char)130 // Cursor Key Right #define VI_K_LEFT (char)131 // cursor key Left #define VI_K_HOME (char)132 // Cursor Key Home #define VI_K_END (char)133 // Cursor Key End #define VI_K_INSERT (char)134 // Cursor Key Insert #define VI_K_PAGEUP (char)135 // Cursor Key Page Up #define VI_K_PAGEDOWN (char)136 // Cursor Key Page Down #define VI_K_FUN1 (char)137 // Function Key F1 #define VI_K_FUN2 (char)138 // Function Key F2 #define VI_K_FUN3 (char)139 // Function Key F3 #define VI_K_FUN4 (char)140 // Function Key F4 #define VI_K_FUN5 (char)141 // Function Key F5 #define VI_K_FUN6 (char)142 // Function Key F6 #define VI_K_FUN7 (char)143 // Function Key F7 #define VI_K_FUN8 (char)144 // Function Key F8 #define VI_K_FUN9 (char)145 // Function Key F9 #define VI_K_FUN10 (char)146 // Function Key F10 #define VI_K_FUN11 (char)147 // Function Key F11 #define VI_K_FUN12 (char)148 // Function Key F12 /* vt102 typical ESC sequence */ /* terminal standout start/normal ESC sequence */ static const char SOs[] = "\033[7m"; static const char SOn[] = "\033[0m"; /* terminal bell sequence */ static const char bell[] = "\007"; /* Clear-end-of-line and Clear-end-of-screen ESC sequence */ static const char Ceol[] = "\033[0K"; static const char Ceos [] = "\033[0J"; /* Cursor motion arbitrary destination ESC sequence */ static const char CMrc[] = "\033[%d;%dH"; /* Cursor motion up and down ESC sequence */ static const char CMup[] = "\033[A"; static const char CMdown[] = "\n"; enum { YANKONLY = FALSE, YANKDEL = TRUE, FORWARD = 1, // code depends on "1" for array index BACK = -1, // code depends on "-1" for array index LIMITED = 0, // how much of text[] in char_search FULL = 1, // how much of text[] in char_search S_BEFORE_WS = 1, // used in skip_thing() for moving "dot" S_TO_WS = 2, // used in skip_thing() for moving "dot" S_OVER_WS = 3, // used in skip_thing() for moving "dot" S_END_PUNCT = 4, // used in skip_thing() for moving "dot" S_END_ALNUM = 5, // used in skip_thing() for moving "dot" }; /* vi.c expects chars to be unsigned. */ /* busybox build system provides that, but it's better */ /* to audit and fix the source */ static int vi_setops; #define VI_AUTOINDENT 1 #define VI_SHOWMATCH 2 #define VI_IGNORECASE 4 #define VI_ERR_METHOD 8 #define autoindent (vi_setops & VI_AUTOINDENT) #define showmatch (vi_setops & VI_SHOWMATCH ) #define ignorecase (vi_setops & VI_IGNORECASE) /* indicate error with beep or flash */ #define err_method (vi_setops & VI_ERR_METHOD) static int editing; // >0 while we are editing a file static int cmd_mode; // 0=command 1=insert 2=replace static int file_modified; // buffer contents changed static int last_file_modified = -1; static int fn_start; // index of first cmd line file name static int save_argc; // how many file names on cmd line static int cmdcnt; // repetition count static fd_set rfds; // use select() for small sleeps static struct timeval tv; // use select() for small sleeps static int rows, columns; // the terminal screen is this size static int crow, ccol, offset; // cursor is on Crow x Ccol with Horz Ofset static char *status_buffer; // mesages to the user #define STATUS_BUFFER_LEN 200 static int have_status_msg; // is default edit status needed? static int last_status_cksum; // hash of current status line static char *cfn; // previous, current, and next file name static char *text, *end; // pointers to the user data in memory static char *screen; // pointer to the virtual screen buffer static int screensize; // and its size static char *screenbegin; // index into text[], of top line on the screen static char *dot; // where all the action takes place static int tabstop; static struct termios term_orig, term_vi; // remember what the cooked mode was static char erase_char; // the users erase character static char last_input_char; // last char read from user static char last_forward_char; // last char searched for with 'f' #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR static int last_row; // where the cursor was last moved to #endif #if ENABLE_FEATURE_VI_USE_SIGNALS static jmp_buf restart; // catch_sig() #endif #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME static int my_pid; #endif #if ENABLE_FEATURE_VI_DOT_CMD static int adding2q; // are we currently adding user input to q static char *last_modifying_cmd; // last modifying cmd for "." static char *ioq, *ioq_start; // pointer to string for get_one_char to "read" #endif #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK static char *modifying_cmds; // cmds that modify text[] #endif #if ENABLE_FEATURE_VI_READONLY static int vi_readonly, readonly; #endif #if ENABLE_FEATURE_VI_YANKMARK static char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27 static int YDreg, Ureg; // default delete register and orig line for "U" static char *mark[28]; // user marks points somewhere in text[]- a-z and previous context '' static char *context_start, *context_end; #endif #if ENABLE_FEATURE_VI_SEARCH static char *last_search_pattern; // last pattern from a '/' or '?' search #endif static void edit_file(char *); // edit one file static void do_cmd(char); // execute a command static void sync_cursor(char *, int *, int *); // synchronize the screen cursor to dot static char *begin_line(char *); // return pointer to cur line B-o-l static char *end_line(char *); // return pointer to cur line E-o-l static char *prev_line(char *); // return pointer to prev line B-o-l static char *next_line(char *); // return pointer to next line B-o-l static char *end_screen(void); // get pointer to last char on screen static int count_lines(char *, char *); // count line from start to stop static char *find_line(int); // find begining of line #li static char *move_to_col(char *, int); // move "p" to column l static int isblnk(char); // is the char a blank or tab static void dot_left(void); // move dot left- dont leave line static void dot_right(void); // move dot right- dont leave line static void dot_begin(void); // move dot to B-o-l static void dot_end(void); // move dot to E-o-l static void dot_next(void); // move dot to next line B-o-l static void dot_prev(void); // move dot to prev line B-o-l static void dot_scroll(int, int); // move the screen up or down static void dot_skip_over_ws(void); // move dot pat WS static void dot_delete(void); // delete the char at 'dot' static char *bound_dot(char *); // make sure text[0] <= P < "end" static char *new_screen(int, int); // malloc virtual screen memory static char *new_text(int); // malloc memory for text[] buffer static char *char_insert(char *, char); // insert the char c at 'p' static char *stupid_insert(char *, char); // stupidly insert the char c at 'p' static char find_range(char **, char **, char); // return pointers for an object static int st_test(char *, int, int, char *); // helper for skip_thing() static char *skip_thing(char *, int, int, int); // skip some object static char *find_pair(char *, char); // find matching pair () [] {} static char *text_hole_delete(char *, char *); // at "p", delete a 'size' byte hole static char *text_hole_make(char *, int); // at "p", make a 'size' byte hole static char *yank_delete(char *, char *, int, int); // yank text[] into register then delete static void show_help(void); // display some help info static void rawmode(void); // set "raw" mode on tty static void cookmode(void); // return to "cooked" mode on tty static int mysleep(int); // sleep for 'h' 1/100 seconds static char readit(void); // read (maybe cursor) key from stdin static char get_one_char(void); // read 1 char from stdin static int file_size(const char *); // what is the byte size of "fn" static int file_insert(char *, char *, int); static int file_write(char *, char *, char *); static void place_cursor(int, int, int); static void screen_erase(void); static void clear_to_eol(void); static void clear_to_eos(void); static void standout_start(void); // send "start reverse video" sequence static void standout_end(void); // send "end reverse video" sequence static void flash(int); // flash the terminal screen static void show_status_line(void); // put a message on the bottom line static void psb(const char *, ...); // Print Status Buf static void psbs(const char *, ...); // Print Status Buf in standout mode static void ni(const char *); // display messages static int format_edit_status(void); // format file status on status line static void redraw(int); // force a full screen refresh static void format_line(char*, char*, int); static void refresh(int); // update the terminal from screen[] static void Indicate_Error(void); // use flash or beep to indicate error #define indicate_error(c) Indicate_Error() static void Hit_Return(void); #if ENABLE_FEATURE_VI_SEARCH static char *char_search(char *, const char *, int, int); // search for pattern starting at p static int mycmp(const char *, const char *, int); // string cmp based in "ignorecase" #endif #if ENABLE_FEATURE_VI_COLON static char *get_one_address(char *, int *); // get colon addr, if present static char *get_address(char *, int *, int *); // get two colon addrs, if present static void colon(char *); // execute the "colon" mode cmds #endif #if ENABLE_FEATURE_VI_USE_SIGNALS static void winch_sig(int); // catch window size changes static void suspend_sig(int); // catch ctrl-Z static void catch_sig(int); // catch ctrl-C and alarm time-outs #endif #if ENABLE_FEATURE_VI_DOT_CMD static void start_new_cmd_q(char); // new queue for command static void end_cmd_q(void); // stop saving input chars #else #define end_cmd_q() ((void)0) #endif #if ENABLE_FEATURE_VI_SETOPTS static void showmatching(char *); // show the matching pair () [] {} #endif #if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME static char *string_insert(char *, char *); // insert the string at 'p' #endif #if ENABLE_FEATURE_VI_YANKMARK static char *text_yank(char *, char *, int); // save copy of "p" into a register static char what_reg(void); // what is letter of current YDreg static void check_context(char); // remember context for '' command #endif #if ENABLE_FEATURE_VI_CRASHME static void crash_dummy(); static void crash_test(); static int crashme = 0; #endif static char *initial_cmds[] = { NULL, NULL , NULL }; // currently 2 entries, NULL terminated static void write1(const char *out) { fputs(out, stdout); } int vi_main(int argc, char **argv); int vi_main(int argc, char **argv) { int c; RESERVE_CONFIG_BUFFER(STATUS_BUFFER, STATUS_BUFFER_LEN); #if ENABLE_FEATURE_VI_YANKMARK int i; #endif #if defined(CONFIG_FEATURE_VI_USE_SIGNALS) || defined(CONFIG_FEATURE_VI_CRASHME) my_pid = getpid(); #endif #if ENABLE_FEATURE_VI_CRASHME srand((long) my_pid); #endif status_buffer = STATUS_BUFFER; last_status_cksum = 0; #if ENABLE_FEATURE_VI_READONLY vi_readonly = readonly = FALSE; if (strncmp(argv[0], "view", 4) == 0) { readonly = TRUE; vi_readonly = TRUE; } #endif vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE | VI_ERR_METHOD; #if ENABLE_FEATURE_VI_YANKMARK for (i = 0; i < 28; i++) { reg[i] = 0; } // init the yank regs #endif #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK modifying_cmds = (char *) "aAcCdDiIJoOpPrRsxX<>~"; // cmds modifying text[] #endif // 1- process $HOME/.exrc file (not inplemented yet) // 2- process EXINIT variable from environment // 3- process command line args { char *p = getenv("EXINIT"); if (p && *p) initial_cmds[0] = xstrdup(p); } while ((c = getopt(argc, argv, "hCRc:")) != -1) { switch (c) { #if ENABLE_FEATURE_VI_CRASHME case 'C': crashme = 1; break; #endif #if ENABLE_FEATURE_VI_READONLY case 'R': // Read-only flag readonly = TRUE; vi_readonly = TRUE; break; #endif //case 'r': // recover flag- ignore- we don't use tmp file //case 'x': // encryption flag- ignore //case 'c': // execute command first case 'c': // cmd line vi command if (*optarg) initial_cmds[initial_cmds[0] != 0] = xstrdup(optarg); break; //case 'h': // help -- just use default default: show_help(); return 1; } } // The argv array can be used by the ":next" and ":rewind" commands // save optind. fn_start = optind; // remember first file name for :next and :rew save_argc = argc; //----- This is the main file handling loop -------------- if (optind >= argc) { editing = 1; // 0= exit, 1= one file, 2= multiple files edit_file(0); } else { for (; optind < argc; optind++) { editing = 1; // 0=exit, 1=one file, 2+ =many files free(cfn); cfn = xstrdup(argv[optind]); edit_file(cfn); } } //----------------------------------------------------------- return 0; } static void edit_file(char * fn) { char c; int cnt, size, ch; #if ENABLE_FEATURE_VI_USE_SIGNALS int sig; #endif #if ENABLE_FEATURE_VI_YANKMARK static char *cur_line; #endif rawmode(); rows = 24; columns = 80; ch = -1; if (ENABLE_FEATURE_VI_WIN_RESIZE) get_terminal_width_height(0, &columns, &rows); new_screen(rows, columns); // get memory for virtual screen cnt = file_size(fn); // file size size = 2 * cnt; // 200% of file size new_text(size); // get a text[] buffer screenbegin = dot = end = text; if (fn != 0) { ch = file_insert(fn, text, cnt); } if (ch < 1) { char_insert(text, '\n'); // start empty buf with dummy line } file_modified = 0; last_file_modified = -1; #if ENABLE_FEATURE_VI_YANKMARK YDreg = 26; // default Yank/Delete reg Ureg = 27; // hold orig line for "U" cmd for (cnt = 0; cnt < 28; cnt++) { mark[cnt] = 0; } // init the marks mark[26] = mark[27] = text; // init "previous context" #endif last_forward_char = last_input_char = '\0'; crow = 0; ccol = 0; #if ENABLE_FEATURE_VI_USE_SIGNALS catch_sig(0); signal(SIGWINCH, winch_sig); signal(SIGTSTP, suspend_sig); sig = setjmp(restart); if (sig != 0) { screenbegin = dot = text; } #endif editing = 1; cmd_mode = 0; // 0=command 1=insert 2='R'eplace cmdcnt = 0; tabstop = 8; offset = 0; // no horizontal offset c = '\0'; #if ENABLE_FEATURE_VI_DOT_CMD free(last_modifying_cmd); free(ioq_start); ioq = ioq_start = last_modifying_cmd = NULL; adding2q = 0; #endif redraw(FALSE); // dont force every col re-draw show_status_line(); { char *p, *q; int n = 0; while ((p = initial_cmds[n])) { do { q = p; p = strchr(q,'\n'); if (p) while(*p == '\n') *p++ = '\0'; if (*q) colon(q); } while (p); free(initial_cmds[n]); initial_cmds[n] = NULL; n++; } } //------This is the main Vi cmd handling loop ----------------------- while (editing > 0) { #if ENABLE_FEATURE_VI_CRASHME if (crashme > 0) { if ((end - text) > 1) { crash_dummy(); // generate a random command } else { crashme = 0; dot = string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string refresh(FALSE); } } #endif last_input_char = c = get_one_char(); // get a cmd from user #if ENABLE_FEATURE_VI_YANKMARK // save a copy of the current line- for the 'U" command if (begin_line(dot) != cur_line) { cur_line = begin_line(dot); text_yank(begin_line(dot), end_line(dot), Ureg); } #endif #if ENABLE_FEATURE_VI_DOT_CMD // These are commands that change text[]. // Remember the input for the "." command if (!adding2q && ioq_start == 0 && strchr(modifying_cmds, c) ) { start_new_cmd_q(c); } #endif do_cmd(c); // execute the user command // // poll to see if there is input already waiting. if we are // not able to display output fast enough to keep up, skip // the display update until we catch up with input. if (mysleep(0) == 0) { // no input pending- so update output refresh(FALSE); show_status_line(); } #if ENABLE_FEATURE_VI_CRASHME if (crashme > 0) crash_test(); // test editor variables #endif } //------------------------------------------------------------------- place_cursor(rows, 0, FALSE); // go to bottom of screen clear_to_eol(); // Erase to end of line cookmode(); } //----- The Colon commands ------------------------------------- #if ENABLE_FEATURE_VI_COLON static char *get_one_address(char * p, int *addr) // get colon addr, if present { int st; char *q; #if ENABLE_FEATURE_VI_YANKMARK char c; #endif #if ENABLE_FEATURE_VI_SEARCH char *pat, buf[BUFSIZ]; #endif *addr = -1; // assume no addr if (*p == '.') { // the current line p++; q = begin_line(dot); *addr = count_lines(text, q); #if ENABLE_FEATURE_VI_YANKMARK } else if (*p == '\'') { // is this a mark addr p++; c = tolower(*p); p++; if (c >= 'a' && c <= 'z') { // we have a mark c = c - 'a'; q = mark[(unsigned char) c]; if (q != NULL) { // is mark valid *addr = count_lines(text, q); // count lines } } #endif #if ENABLE_FEATURE_VI_SEARCH } else if (*p == '/') { // a search pattern q = buf; for (p++; *p; p++) { if (*p == '/') break; *q++ = *p; *q = '\0'; } pat = xstrdup(buf); // save copy of pattern if (*p == '/') p++; q = char_search(dot, pat, FORWARD, FULL); if (q != NULL) { *addr = count_lines(text, q); } free(pat); #endif } else if (*p == '$') { // the last line in file p++; q = begin_line(end - 1); *addr = count_lines(text, q); } else if (isdigit(*p)) { // specific line number sscanf(p, "%d%n", addr, &st); p += st; } else { // I don't reconise this // unrecognised address- assume -1 *addr = -1; } return p; } static char *get_address(char *p, int *b, int *e) // get two colon addrs, if present { //----- get the address' i.e., 1,3 'a,'b ----- // get FIRST addr, if present while (isblnk(*p)) p++; // skip over leading spaces if (*p == '%') { // alias for 1,$ p++; *b = 1; *e = count_lines(text, end-1); goto ga0; } p = get_one_address(p, b); while (isblnk(*p)) p++; if (*p == ',') { // is there a address separator p++; while (isblnk(*p)) p++; // get SECOND addr, if present p = get_one_address(p, e); } ga0: while (isblnk(*p)) p++; // skip over trailing spaces return p; } #if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS static void setops(const char *args, const char *opname, int flg_no, const char *short_opname, int opt) { const char *a = args + flg_no; int l = strlen(opname) - 1; /* opname have + ' ' */ if (strncasecmp(a, opname, l) == 0 || strncasecmp(a, short_opname, 2) == 0 ) { if (flg_no) vi_setops &= ~opt; else vi_setops |= opt; } } #endif static void colon(char * buf) { char c, *orig_buf, *buf1, *q, *r; char *fn, cmd[BUFSIZ], args[BUFSIZ]; int i, l, li, ch, b, e; int useforce = FALSE, forced = FALSE; struct stat st_buf; // :3154 // if (-e line 3154) goto it else stay put // :4,33w! foo // write a portion of buffer to file "foo" // :w // write all of buffer to current file // :q // quit // :q! // quit- dont care about modified file // :'a,'z!sort -u // filter block through sort // :'f // goto mark "f" // :'fl // list literal the mark "f" line // :.r bar // read file "bar" into buffer before dot // :/123/,/abc/d // delete lines from "123" line to "abc" line // :/xyz/ // goto the "xyz" line // :s/find/replace/ // substitute pattern "find" with "replace" // :! // run then return // if (!buf[0]) goto vc1; if (*buf == ':') buf++; // move past the ':' li = ch = i = 0; b = e = -1; q = text; // assume 1,$ for the range r = end - 1; li = count_lines(text, end - 1); fn = cfn; // default to current file memset(cmd, '\0', BUFSIZ); // clear cmd[] memset(args, '\0', BUFSIZ); // clear args[] // look for optional address(es) :. :1 :1,9 :'q,'a :% buf = get_address(buf, &b, &e); // remember orig command line orig_buf = buf; // get the COMMAND into cmd[] buf1 = cmd; while (*buf != '\0') { if (isspace(*buf)) break; *buf1++ = *buf++; } // get any ARGuments while (isblnk(*buf)) buf++; strcpy(args, buf); buf1 = last_char_is(cmd, '!'); if (buf1) { useforce = TRUE; *buf1 = '\0'; // get rid of ! } if (b >= 0) { // if there is only one addr, then the addr // is the line number of the single line the // user wants. So, reset the end // pointer to point at end of the "b" line q = find_line(b); // what line is #b r = end_line(q); li = 1; } if (e >= 0) { // we were given two addrs. change the // end pointer to the addr given by user. r = find_line(e); // what line is #e r = end_line(r); li = e - b + 1; } // ------------ now look for the command ------------ i = strlen(cmd); if (i == 0) { // :123CR goto line #123 if (b >= 0) { dot = find_line(b); // what line is #b dot_skip_over_ws(); } } #if ENABLE_FEATURE_ALLOW_EXEC else if (strncmp(cmd, "!", 1) == 0) { // run a cmd // :!ls run the alarm(0); // wait for input- no alarms place_cursor(rows - 1, 0, FALSE); // go to Status line clear_to_eol(); // clear the line cookmode(); system(orig_buf + 1); // run the cmd rawmode(); Hit_Return(); // let user see results alarm(3); // done waiting for input } #endif else if (strncmp(cmd, "=", i) == 0) { // where is the address if (b < 0) { // no addr given- use defaults b = e = count_lines(text, dot); } psb("%d", b); } else if (strncasecmp(cmd, "delete", i) == 0) { // delete lines if (b < 0) { // no addr given- use defaults q = begin_line(dot); // assume .,. for the range r = end_line(dot); } dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines dot_skip_over_ws(); } else if (strncasecmp(cmd, "edit", i) == 0) { // Edit a file int sr; sr= 0; // don't edit, if the current file has been modified if (file_modified && ! useforce) { psbs("No write since last change (:edit! overrides)"); goto vc1; } if (args[0]) { // the user supplied a file name fn= args; } else if (cfn && cfn[0]) { // no user supplied name- use the current filename fn= cfn; goto vc5; } else { // no user file name, no current name- punt psbs("No current filename"); goto vc1; } // see if file exists- if not, its just a new file request sr = stat(fn, &st_buf); if (sr < 0) { // This is just a request for a new file creation. // The file_insert below will fail but we get // an empty buffer with a file name. Then the "write" // command can do the create. } else { if ((st_buf.st_mode & S_IFREG) == 0) { // This is not a regular file psbs("\"%s\" is not a regular file", fn); goto vc1; } if ((st_buf.st_mode & (S_IRUSR | S_IRGRP | S_IROTH)) == 0) { // dont have any read permissions psbs("\"%s\" is not readable", fn); goto vc1; } } // There is a read-able regular file // make this the current file q = xstrdup(fn); // save the cfn free(cfn); // free the old name cfn = q; // remember new cfn vc5: // delete all the contents of text[] new_text(2 * file_size(fn)); screenbegin = dot = end = text; // insert new file ch = file_insert(fn, text, file_size(fn)); if (ch < 1) { // start empty buf with dummy line char_insert(text, '\n'); ch = 1; } file_modified = 0; last_file_modified = -1; #if ENABLE_FEATURE_VI_YANKMARK if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) { free(reg[Ureg]); // free orig line reg- for 'U' reg[Ureg]= 0; } if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) { free(reg[YDreg]); // free default yank/delete register reg[YDreg]= 0; } for (li = 0; li < 28; li++) { mark[li] = 0; } // init the marks #endif // how many lines in text[]? li = count_lines(text, end - 1); psb("\"%s\"%s" #if ENABLE_FEATURE_VI_READONLY "%s" #endif " %dL, %dC", cfn, (sr < 0 ? " [New file]" : ""), #if ENABLE_FEATURE_VI_READONLY ((vi_readonly || readonly) ? " [Read only]" : ""), #endif li, ch); } else if (strncasecmp(cmd, "file", i) == 0) { // what File is this if (b != -1 || e != -1) { ni("No address allowed on this command"); goto vc1; } if (args[0]) { // user wants a new filename free(cfn); cfn = xstrdup(args); } else { // user wants file status info last_status_cksum = 0; // force status update } } else if (strncasecmp(cmd, "features", i) == 0) { // what features are available // print out values of all features place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen clear_to_eol(); // clear the line cookmode(); show_help(); rawmode(); Hit_Return(); } else if (strncasecmp(cmd, "list", i) == 0) { // literal print line if (b < 0) { // no addr given- use defaults q = begin_line(dot); // assume .,. for the range r = end_line(dot); } place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen clear_to_eol(); // clear the line puts("\r"); for (; q <= r; q++) { int c_is_no_print; c = *q; c_is_no_print = (c & 0x80) && !Isprint(c); if (c_is_no_print) { c = '.'; standout_start(); } if (c == '\n') { write1("$\r"); } else if (c < ' ' || c == 127) { putchar('^'); if (c == 127) c = '?'; else c += '@'; } putchar(c); if (c_is_no_print) standout_end(); } #if ENABLE_FEATURE_VI_SET vc2: #endif Hit_Return(); } else if (strncasecmp(cmd, "quit", i) == 0 // Quit || strncasecmp(cmd, "next", i) == 0 // edit next file ) { if (useforce) { // force end of argv list if (*cmd == 'q') { optind = save_argc; } editing = 0; goto vc1; } // don't exit if the file been modified if (file_modified) { psbs("No write since last change (:%s! overrides)", (*cmd == 'q' ? "quit" : "next")); goto vc1; } // are there other file to edit if (*cmd == 'q' && optind < save_argc - 1) { psbs("%d more file to edit", (save_argc - optind - 1)); goto vc1; } if (*cmd == 'n' && optind >= save_argc - 1) { psbs("No more files to edit"); goto vc1; } editing = 0; } else if (strncasecmp(cmd, "read", i) == 0) { // read file into text[] fn = args; if (!fn[0]) { psbs("No filename given"); goto vc1; } if (b < 0) { // no addr given- use defaults q = begin_line(dot); // assume "dot" } // read after current line- unless user said ":0r foo" if (b != 0) q = next_line(q); #if ENABLE_FEATURE_VI_READONLY l = readonly; // remember current files' status #endif ch = file_insert(fn, q, file_size(fn)); #if ENABLE_FEATURE_VI_READONLY readonly= l; #endif if (ch < 0) goto vc1; // nothing was inserted // how many lines in text[]? li = count_lines(q, q + ch - 1); psb("\"%s\"" #if ENABLE_FEATURE_VI_READONLY "%s" #endif " %dL, %dC", fn, #if ENABLE_FEATURE_VI_READONLY ((vi_readonly || readonly) ? " [Read only]" : ""), #endif li, ch); if (ch > 0) { // if the insert is before "dot" then we need to update if (q <= dot) dot += ch; file_modified++; } } else if (strncasecmp(cmd, "rewind", i) == 0) { // rewind cmd line args if (file_modified && ! useforce) { psbs("No write since last change (:rewind! overrides)"); } else { // reset the filenames to edit optind = fn_start - 1; editing = 0; } #if ENABLE_FEATURE_VI_SET } else if (strncasecmp(cmd, "set", i) == 0) { // set or clear features char *argp; i = 0; // offset into args // only blank is regarded as args delmiter. What about tab '\t' ? if (!args[0] || strcasecmp(args, "all") == 0) { // print out values of all options place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen clear_to_eol(); // clear the line printf("----------------------------------------\r\n"); #if ENABLE_FEATURE_VI_SETOPTS if (!autoindent) printf("no"); printf("autoindent "); if (!err_method) printf("no"); printf("flash "); if (!ignorecase) printf("no"); printf("ignorecase "); if (!showmatch) printf("no"); printf("showmatch "); printf("tabstop=%d ", tabstop); #endif printf("\r\n"); goto vc2; } #if ENABLE_FEATURE_VI_SETOPTS argp = args; while (*argp) { if (strncasecmp(argp, "no", 2) == 0) i = 2; // ":set noautoindent" setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT); setops(argp, "flash ", i, "fl", VI_ERR_METHOD); setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE); setops(argp, "showmatch ", i, "ic", VI_SHOWMATCH); /* tabstopXXXX */ if (strncasecmp(argp + i, "tabstop=%d ", 7) == 0) { sscanf(strchr(argp + i, '='), "tabstop=%d" + 7, &ch); if (ch > 0 && ch < columns - 1) tabstop = ch; } while (*argp && *argp != ' ') argp++; // skip to arg delimiter (i.e. blank) while (*argp && *argp == ' ') argp++; // skip all delimiting blanks } #endif /* FEATURE_VI_SETOPTS */ #endif /* FEATURE_VI_SET */ #if ENABLE_FEATURE_VI_SEARCH } else if (strncasecmp(cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern char *ls, *F, *R; int gflag; // F points to the "find" pattern // R points to the "replace" pattern // replace the cmd line delimiters "/" with NULLs gflag = 0; // global replace flag c = orig_buf[1]; // what is the delimiter F = orig_buf + 2; // start of "find" R = strchr(F, c); // middle delimiter if (!R) goto colon_s_fail; *R++ = '\0'; // terminate "find" buf1 = strchr(R, c); if (!buf1) goto colon_s_fail; *buf1++ = '\0'; // terminate "replace" if (*buf1 == 'g') { // :s/foo/bar/g buf1++; gflag++; // turn on gflag } q = begin_line(q); if (b < 0) { // maybe :s/foo/bar/ q = begin_line(dot); // start with cur line b = count_lines(text, q); // cur line number } if (e < 0) e = b; // maybe :.s/foo/bar/ for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0 ls = q; // orig line start vc4: buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find" if (buf1) { // we found the "find" pattern - delete it text_hole_delete(buf1, buf1 + strlen(F) - 1); // inset the "replace" patern string_insert(buf1, R); // insert the string // check for "global" :s/foo/bar/g if (gflag == 1) { if ((buf1 + strlen(R)) < end_line(ls)) { q = buf1 + strlen(R); goto vc4; // don't let q move past cur line } } } q = next_line(ls); } #endif /* FEATURE_VI_SEARCH */ } else if (strncasecmp(cmd, "version", i) == 0) { // show software version psb("%s", BB_VER " " BB_BT); } else if (strncasecmp(cmd, "write", i) == 0 // write text to file || strncasecmp(cmd, "wq", i) == 0 || strncasecmp(cmd, "wn", i) == 0 || strncasecmp(cmd, "x", i) == 0 ) { // is there a file name to write to? if (args[0]) { fn = args; } #if ENABLE_FEATURE_VI_READONLY if ((vi_readonly || readonly) && ! useforce) { psbs("\"%s\" File is read only", fn); goto vc3; } #endif // how many lines in text[]? li = count_lines(q, r); ch = r - q + 1; // see if file exists- if not, its just a new file request if (useforce) { // if "fn" is not write-able, chmod u+w // sprintf(syscmd, "chmod u+w %s", fn); // system(syscmd); forced = TRUE; } l = file_write(fn, q, r); if (useforce && forced) { // chmod u-w // sprintf(syscmd, "chmod u-w %s", fn); // system(syscmd); forced = FALSE; } if (l < 0) { if (l == -1) psbs("Write error: %s", strerror(errno)); } else { psb("\"%s\" %dL, %dC", fn, li, l); if (q == text && r == end - 1 && l == ch) { file_modified = 0; last_file_modified = -1; } if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n' || cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N') && l == ch) { editing = 0; } } #if ENABLE_FEATURE_VI_READONLY vc3:; #endif #if ENABLE_FEATURE_VI_YANKMARK } else if (strncasecmp(cmd, "yank", i) == 0) { // yank lines if (b < 0) { // no addr given- use defaults q = begin_line(dot); // assume .,. for the range r = end_line(dot); } text_yank(q, r, YDreg); li = count_lines(q, r); psb("Yank %d lines (%d chars) into [%c]", li, strlen(reg[YDreg]), what_reg()); #endif } else { // cmd unknown ni(cmd); } vc1: dot = bound_dot(dot); // make sure "dot" is valid return; #if ENABLE_FEATURE_VI_SEARCH colon_s_fail: psb(":s expression missing delimiters"); #endif } #endif /* FEATURE_VI_COLON */ static void Hit_Return(void) { char c; standout_start(); // start reverse video write1("[Hit return to continue]"); standout_end(); // end reverse video while ((c = get_one_char()) != '\n' && c != '\r') /*do nothing */ ; redraw(TRUE); // force redraw all } //----- Synchronize the cursor to Dot -------------------------- static void sync_cursor(char * d, int *row, int *col) { char *beg_cur; // begin and end of "d" line char *end_scr; // begin and end of screen char *tp; int cnt, ro, co; beg_cur = begin_line(d); // first char of cur line end_scr = end_screen(); // last char of screen if (beg_cur < screenbegin) { // "d" is before top line on screen // how many lines do we have to move cnt = count_lines(beg_cur, screenbegin); sc1: screenbegin = beg_cur; if (cnt > (rows - 1) / 2) { // we moved too many lines. put "dot" in middle of screen for (cnt = 0; cnt < (rows - 1) / 2; cnt++) { screenbegin = prev_line(screenbegin); } } } else if (beg_cur > end_scr) { // "d" is after bottom line on screen // how many lines do we have to move cnt = count_lines(end_scr, beg_cur); if (cnt > (rows - 1) / 2) goto sc1; // too many lines for (ro = 0; ro < cnt - 1; ro++) { // move screen begin the same amount screenbegin = next_line(screenbegin); // now, move the end of screen end_scr = next_line(end_scr); end_scr = end_line(end_scr); } } // "d" is on screen- find out which row tp = screenbegin; for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row if (tp == beg_cur) break; tp = next_line(tp); } // find out what col "d" is on co = 0; do { // drive "co" to correct column if (*tp == '\n' || *tp == '\0') break; if (*tp == '\t') { // 7 - (co % 8 ) co += ((tabstop - 1) - (co % tabstop)); } else if (*tp < ' ' || *tp == 127) { co++; // display as ^X, use 2 columns } } while (tp++ < d && ++co); // "co" is the column where "dot" is. // The screen has "columns" columns. // The currently displayed columns are 0+offset -- columns+ofset // |-------------------------------------------------------------| // ^ ^ ^ // offset | |------- columns ----------------| // // If "co" is already in this range then we do not have to adjust offset // but, we do have to subtract the "offset" bias from "co". // If "co" is outside this range then we have to change "offset". // If the first char of a line is a tab the cursor will try to stay // in column 7, but we have to set offset to 0. if (co < 0 + offset) { offset = co; } if (co >= columns + offset) { offset = co - columns + 1; } // if the first char of the line is a tab, and "dot" is sitting on it // force offset to 0. if (d == beg_cur && *d == '\t') { offset = 0; } co -= offset; *row = ro; *col = co; } //----- Text Movement Routines --------------------------------- static char *begin_line(char * p) // return pointer to first char cur line { while (p > text && p[-1] != '\n') p--; // go to cur line B-o-l return p; } static char *end_line(char * p) // return pointer to NL of cur line line { while (p < end - 1 && *p != '\n') p++; // go to cur line E-o-l return p; } static inline char *dollar_line(char * p) // return pointer to just before NL line { while (p < end - 1 && *p != '\n') p++; // go to cur line E-o-l // Try to stay off of the Newline if (*p == '\n' && (p - begin_line(p)) > 0) p--; return p; } static char *prev_line(char * p) // return pointer first char prev line { p = begin_line(p); // goto begining of cur line if (p[-1] == '\n' && p > text) p--; // step to prev line p = begin_line(p); // goto begining of prev line return p; } static char *next_line(char * p) // return pointer first char next line { p = end_line(p); if (*p == '\n' && p < end - 1) p++; // step to next line return p; } //----- Text Information Routines ------------------------------ static char *end_screen(void) { char *q; int cnt; // find new bottom line q = screenbegin; for (cnt = 0; cnt < rows - 2; cnt++) q = next_line(q); q = end_line(q); return q; } static int count_lines(char * start, char * stop) // count line from start to stop { char *q; int cnt; if (stop < start) { // start and stop are backwards- reverse them q = start; start = stop; stop = q; } cnt = 0; stop = end_line(stop); // get to end of this line for (q = start; q <= stop && q <= end - 1; q++) { if (*q == '\n') cnt++; } return cnt; } static char *find_line(int li) // find begining of line #li { char *q; for (q = text; li > 1; li--) { q = next_line(q); } return q; } //----- Dot Movement Routines ---------------------------------- static void dot_left(void) { if (dot > text && dot[-1] != '\n') dot--; } static void dot_right(void) { if (dot < end - 1 && *dot != '\n') dot++; } static void dot_begin(void) { dot = begin_line(dot); // return pointer to first char cur line } static void dot_end(void) { dot = end_line(dot); // return pointer to last char cur line } static char *move_to_col(char * p, int l) { int co; p = begin_line(p); co = 0; do { if (*p == '\n' || *p == '\0') break; if (*p == '\t') { // 7 - (co % 8 ) co += ((tabstop - 1) - (co % tabstop)); } else if (*p < ' ' || *p == 127) { co++; // display as ^X, use 2 columns } } while (++co <= l && p++ < end); return p; } static void dot_next(void) { dot = next_line(dot); } static void dot_prev(void) { dot = prev_line(dot); } static void dot_scroll(int cnt, int dir) { char *q; for (; cnt > 0; cnt--) { if (dir < 0) { // scroll Backwards // ctrl-Y scroll up one line screenbegin = prev_line(screenbegin); } else { // scroll Forwards // ctrl-E scroll down one line screenbegin = next_line(screenbegin); } } // make sure "dot" stays on the screen so we dont scroll off if (dot < screenbegin) dot = screenbegin; q = end_screen(); // find new bottom line if (dot > q) dot = begin_line(q); // is dot is below bottom line? dot_skip_over_ws(); } static void dot_skip_over_ws(void) { // skip WS while (isspace(*dot) && *dot != '\n' && dot < end - 1) dot++; } static void dot_delete(void) // delete the char at 'dot' { text_hole_delete(dot, dot); } static char *bound_dot(char * p) // make sure text[0] <= P < "end" { if (p >= end && end > text) { p = end - 1; indicate_error('1'); } if (p < text) { p = text; indicate_error('2'); } return p; } //----- Helper Utility Routines -------------------------------- //---------------------------------------------------------------- //----- Char Routines -------------------------------------------- /* Chars that are part of a word- * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz * Chars that are Not part of a word (stoppers) * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~ * Chars that are WhiteSpace * TAB NEWLINE VT FF RETURN SPACE * DO NOT COUNT NEWLINE AS WHITESPACE */ static char *new_screen(int ro, int co) { int li; free(screen); screensize = ro * co + 8; screen = xmalloc(screensize); // initialize the new screen. assume this will be a empty file. screen_erase(); // non-existent text[] lines start with a tilde (~). for (li = 1; li < ro - 1; li++) { screen[(li * co) + 0] = '~'; } return screen; } static char *new_text(int size) { if (size < 10240) size = 10240; // have a minimum size for new files free(text); text = xmalloc(size + 8); memset(text, '\0', size); // clear new text[] //text += 4; // leave some room for "oops" return text; } #if ENABLE_FEATURE_VI_SEARCH static int mycmp(const char * s1, const char * s2, int len) { int i; i = strncmp(s1, s2, len); #if ENABLE_FEATURE_VI_SETOPTS if (ignorecase) { i = strncasecmp(s1, s2, len); } #endif return i; } // search for pattern starting at p static char *char_search(char * p, const char * pat, int dir, int range) { #ifndef REGEX_SEARCH char *start, *stop; int len; len = strlen(pat); if (dir == FORWARD) { stop = end - 1; // assume range is p - end-1 if (range == LIMITED) stop = next_line(p); // range is to next line for (start = p; start < stop; start++) { if (mycmp(start, pat, len) == 0) { return start; } } } else if (dir == BACK) { stop = text; // assume range is text - p if (range == LIMITED) stop = prev_line(p); // range is to prev line for (start = p - len; start >= stop; start--) { if (mycmp(start, pat, len) == 0) { return start; } } } // pattern not found return NULL; #else /* REGEX_SEARCH */ char *q; struct re_pattern_buffer preg; int i; int size, range; re_syntax_options = RE_SYNTAX_POSIX_EXTENDED; preg.translate = 0; preg.fastmap = 0; preg.buffer = 0; preg.allocated = 0; // assume a LIMITED forward search q = next_line(p); q = end_line(q); q = end - 1; if (dir == BACK) { q = prev_line(p); q = text; } // count the number of chars to search over, forward or backward size = q - p; if (size < 0) size = p - q; // RANGE could be negative if we are searching backwards range = q - p; q = re_compile_pattern(pat, strlen(pat), &preg); if (q != 0) { // The pattern was not compiled psbs("bad search pattern: \"%s\": %s", pat, q); i = 0; // return p if pattern not compiled goto cs1; } q = p; if (range < 0) { q = p - size; if (q < text) q = text; } // search for the compiled pattern, preg, in p[] // range < 0- search backward // range > 0- search forward // 0 < start < size // re_search() < 0 not found or error // re_search() > 0 index of found pattern // struct pattern char int int int struct reg // re_search (*pattern_buffer, *string, size, start, range, *regs) i = re_search(&preg, q, size, 0, range, 0); if (i == -1) { p = 0; i = 0; // return NULL if pattern not found } cs1: if (dir == FORWARD) { p = p + i; } else { p = p - i; } return p; #endif /* REGEX_SEARCH */ } #endif /* FEATURE_VI_SEARCH */ static char *char_insert(char * p, char c) // insert the char c at 'p' { if (c == 22) { // Is this an ctrl-V? p = stupid_insert(p, '^'); // use ^ to indicate literal next p--; // backup onto ^ refresh(FALSE); // show the ^ c = get_one_char(); *p = c; p++; file_modified++; // has the file been modified } else if (c == 27) { // Is this an ESC? cmd_mode = 0; cmdcnt = 0; end_cmd_q(); // stop adding to q last_status_cksum = 0; // force status update if ((p[-1] != '\n') && (dot > text)) { p--; } } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS // 123456789 if ((p[-1] != '\n') && (dot>text)) { p--; p = text_hole_delete(p, p); // shrink buffer 1 char } } else { // insert a char into text[] char *sp; // "save p" if (c == 13) c = '\n'; // translate \r to \n sp = p; // remember addr of insert p = stupid_insert(p, c); // insert the char #if ENABLE_FEATURE_VI_SETOPTS if (showmatch && strchr(")]}", *sp) != NULL) { showmatching(sp); } if (autoindent && c == '\n') { // auto indent the new line char *q; q = prev_line(p); // use prev line as templet for (; isblnk(*q); q++) { p = stupid_insert(p, *q); // insert the char } } #endif } return p; } static char *stupid_insert(char * p, char c) // stupidly insert the char c at 'p' { p = text_hole_make(p, 1); if (p != 0) { *p = c; file_modified++; // has the file been modified p++; } return p; } static char find_range(char ** start, char ** stop, char c) { char *save_dot, *p, *q; int cnt; save_dot = dot; p = q = dot; if (strchr("cdy><", c)) { // these cmds operate on whole lines p = q = begin_line(p); for (cnt = 1; cnt < cmdcnt; cnt++) { q = next_line(q); } q = end_line(q); } else if (strchr("^%$0bBeEft", c)) { // These cmds operate on char positions do_cmd(c); // execute movement cmd q = dot; } else if (strchr("wW", c)) { do_cmd(c); // execute movement cmd // if we are at the next word's first char // step back one char // but check the possibilities when it is true if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0])) || (ispunct(dot[-1]) && !ispunct(dot[0])) || (isalnum(dot[-1]) && !isalnum(dot[0])))) dot--; // move back off of next word if (dot > text && *dot == '\n') dot--; // stay off NL q = dot; } else if (strchr("H-k{", c)) { // these operate on multi-lines backwards q = end_line(dot); // find NL do_cmd(c); // execute movement cmd dot_begin(); p = dot; } else if (strchr("L+j}\r\n", c)) { // these operate on multi-lines forwards p = begin_line(dot); do_cmd(c); // execute movement cmd dot_end(); // find NL q = dot; } else { c = 27; // error- return an ESC char //break; } *start = p; *stop = q; if (q < p) { *start = q; *stop = p; } dot = save_dot; return c; } static int st_test(char * p, int type, int dir, char * tested) { char c, c0, ci; int test, inc; inc = dir; c = c0 = p[0]; ci = p[inc]; test = 0; if (type == S_BEFORE_WS) { c = ci; test = ((!isspace(c)) || c == '\n'); } if (type == S_TO_WS) { c = c0; test = ((!isspace(c)) || c == '\n'); } if (type == S_OVER_WS) { c = c0; test = ((isspace(c))); } if (type == S_END_PUNCT) { c = ci; test = ((ispunct(c))); } if (type == S_END_ALNUM) { c = ci; test = ((isalnum(c)) || c == '_'); } *tested = c; return test; } static char *skip_thing(char * p, int linecnt, int dir, int type) { char c; while (st_test(p, type, dir, &c)) { // make sure we limit search to correct number of lines if (c == '\n' && --linecnt < 1) break; if (dir >= 0 && p >= end - 1) break; if (dir < 0 && p <= text) break; p += dir; // move to next char } return p; } // find matching char of pair () [] {} static char *find_pair(char * p, char c) { char match, *q; int dir, level; match = ')'; level = 1; dir = 1; // assume forward switch (c) { case '(': match = ')'; break; case '[': match = ']'; break; case '{': match = '}'; break; case ')': match = '('; dir = -1; break; case ']': match = '['; dir = -1; break; case '}': match = '{'; dir = -1; break; } for (q = p + dir; text <= q && q < end; q += dir) { // look for match, count levels of pairs (( )) if (*q == c) level++; // increase pair levels if (*q == match) level--; // reduce pair level if (level == 0) break; // found matching pair } if (level != 0) q = NULL; // indicate no match return q; } #if ENABLE_FEATURE_VI_SETOPTS // show the matching char of a pair, () [] {} static void showmatching(char * p) { char *q, *save_dot; // we found half of a pair q = find_pair(p, *p); // get loc of matching char if (q == NULL) { indicate_error('3'); // no matching char } else { // "q" now points to matching pair save_dot = dot; // remember where we are dot = q; // go to new loc refresh(FALSE); // let the user see it mysleep(40); // give user some time dot = save_dot; // go back to old loc refresh(FALSE); } } #endif /* FEATURE_VI_SETOPTS */ // open a hole in text[] static char *text_hole_make(char * p, int size) // at "p", make a 'size' byte hole { char *src, *dest; int cnt; if (size <= 0) goto thm0; src = p; dest = p + size; cnt = end - src; // the rest of buffer if (memmove(dest, src, cnt) != dest) { psbs("can't create room for new characters"); } memset(p, ' ', size); // clear new hole end = end + size; // adjust the new END file_modified++; // has the file been modified thm0: return p; } // close a hole in text[] static char *text_hole_delete(char * p, char * q) // delete "p" thru "q", inclusive { char *src, *dest; int cnt, hole_size; // move forwards, from beginning // assume p <= q src = q + 1; dest = p; if (q < p) { // they are backward- swap them src = p + 1; dest = q; } hole_size = q - p + 1; cnt = end - src; if (src < text || src > end) goto thd0; if (dest < text || dest >= end) goto thd0; if (src >= end) goto thd_atend; // just delete the end of the buffer if (memmove(dest, src, cnt) != dest) { psbs("can't delete the character"); } thd_atend: end = end - hole_size; // adjust the new END if (dest >= end) dest = end - 1; // make sure dest in below end-1 if (end <= text) dest = end = text; // keep pointers valid file_modified++; // has the file been modified thd0: return dest; } // copy text into register, then delete text. // if dist <= 0, do not include, or go past, a NewLine // static char *yank_delete(char * start, char * stop, int dist, int yf) { char *p; // make sure start <= stop if (start > stop) { // they are backwards, reverse them p = start; start = stop; stop = p; } if (dist <= 0) { // we cannot cross NL boundaries p = start; if (*p == '\n') return p; // dont go past a NewLine for (; p + 1 <= stop; p++) { if (p[1] == '\n') { stop = p; // "stop" just before NewLine break; } } } p = start; #if ENABLE_FEATURE_VI_YANKMARK text_yank(start, stop, YDreg); #endif if (yf == YANKDEL) { p = text_hole_delete(start, stop); } // delete lines return p; } static void show_help(void) { puts("These features are available:" #if ENABLE_FEATURE_VI_SEARCH "\n\tPattern searches with / and ?" #endif #if ENABLE_FEATURE_VI_DOT_CMD "\n\tLast command repeat with \'.\'" #endif #if ENABLE_FEATURE_VI_YANKMARK "\n\tLine marking with 'x" "\n\tNamed buffers with \"x" #endif #if ENABLE_FEATURE_VI_READONLY "\n\tReadonly if vi is called as \"view\"" "\n\tReadonly with -R command line arg" #endif #if ENABLE_FEATURE_VI_SET "\n\tSome colon mode commands with \':\'" #endif #if ENABLE_FEATURE_VI_SETOPTS "\n\tSettable options with \":set\"" #endif #if ENABLE_FEATURE_VI_USE_SIGNALS "\n\tSignal catching- ^C" "\n\tJob suspend and resume with ^Z" #endif #if ENABLE_FEATURE_VI_WIN_RESIZE "\n\tAdapt to window re-sizes" #endif ); } static inline void print_literal(char * buf, const char * s) // copy s to buf, convert unprintable { unsigned char c; char b[2]; b[1] = '\0'; buf[0] = '\0'; if (!s[0]) s = "(NULL)"; for (; *s; s++) { int c_is_no_print; c = *s; c_is_no_print = (c & 0x80) && !Isprint(c); if (c_is_no_print) { strcat(buf, SOn); c = '.'; } if (c < ' ' || c == 127) { strcat(buf, "^"); if (c == 127) c = '?'; else c += '@'; } b[0] = c; strcat(buf, b); if (c_is_no_print) strcat(buf, SOs); if (*s == '\n') strcat(buf, "$"); } } #if ENABLE_FEATURE_VI_DOT_CMD static void start_new_cmd_q(char c) { // release old cmd free(last_modifying_cmd); // get buffer for new cmd last_modifying_cmd = xmalloc(BUFSIZ); memset(last_modifying_cmd, '\0', BUFSIZ); // clear new cmd queue // if there is a current cmd count put it in the buffer first if (cmdcnt > 0) sprintf(last_modifying_cmd, "%d%c", cmdcnt, c); else // just save char c onto queue last_modifying_cmd[0] = c; adding2q = 1; } static void end_cmd_q(void) { #if ENABLE_FEATURE_VI_YANKMARK YDreg = 26; // go back to default Yank/Delete reg #endif adding2q = 0; } #endif /* FEATURE_VI_DOT_CMD */ #if ENABLE_FEATURE_VI_YANKMARK \ || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \ || ENABLE_FEATURE_VI_CRASHME static char *string_insert(char * p, char * s) // insert the string at 'p' { int cnt, i; i = strlen(s); p = text_hole_make(p, i); strncpy(p, s, i); for (cnt = 0; *s != '\0'; s++) { if (*s == '\n') cnt++; } #if ENABLE_FEATURE_VI_YANKMARK psb("Put %d lines (%d chars) from [%c]", cnt, i, what_reg()); #endif return p; } #endif #if ENABLE_FEATURE_VI_YANKMARK static char *text_yank(char * p, char * q, int dest) // copy text into a register { char *t; int cnt; if (q < p) { // they are backwards- reverse them t = q; q = p; p = t; } cnt = q - p + 1; t = reg[dest]; free(t); // if already a yank register, free it t = xmalloc(cnt + 1); // get a new register memset(t, '\0', cnt + 1); // clear new text[] strncpy(t, p, cnt); // copy text[] into bufer reg[dest] = t; return p; } static char what_reg(void) { char c; c = 'D'; // default to D-reg if (0 <= YDreg && YDreg <= 25) c = 'a' + (char) YDreg; if (YDreg == 26) c = 'D'; if (YDreg == 27) c = 'U'; return c; } static void check_context(char cmd) { // A context is defined to be "modifying text" // Any modifying command establishes a new context. if (dot < context_start || dot > context_end) { if (strchr(modifying_cmds, cmd) != NULL) { // we are trying to modify text[]- make this the current context mark[27] = mark[26]; // move cur to prev mark[26] = dot; // move local to cur context_start = prev_line(prev_line(dot)); context_end = next_line(next_line(dot)); //loiter= start_loiter= now; } } } static inline char *swap_context(char * p) // goto new context for '' command make this the current context { char *tmp; // the current context is in mark[26] // the previous context is in mark[27] // only swap context if other context is valid if (text <= mark[27] && mark[27] <= end - 1) { tmp = mark[27]; mark[27] = mark[26]; mark[26] = tmp; p = mark[26]; // where we are going- previous context context_start = prev_line(prev_line(prev_line(p))); context_end = next_line(next_line(next_line(p))); } return p; } #endif /* FEATURE_VI_YANKMARK */ static int isblnk(char c) // is the char a blank or tab { return (c == ' ' || c == '\t'); } //----- Set terminal attributes -------------------------------- static void rawmode(void) { tcgetattr(0, &term_orig); term_vi = term_orig; term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's term_vi.c_iflag &= (~IXON & ~ICRNL); term_vi.c_oflag &= (~ONLCR); term_vi.c_cc[VMIN] = 1; term_vi.c_cc[VTIME] = 0; erase_char = term_vi.c_cc[VERASE]; tcsetattr(0, TCSANOW, &term_vi); } static void cookmode(void) { fflush(stdout); tcsetattr(0, TCSANOW, &term_orig); } //----- Come here when we get a window resize signal --------- #if ENABLE_FEATURE_VI_USE_SIGNALS static void winch_sig(int sig ATTRIBUTE_UNUSED) { signal(SIGWINCH, winch_sig); if (ENABLE_FEATURE_VI_WIN_RESIZE) get_terminal_width_height(0, &columns, &rows); new_screen(rows, columns); // get memory for virtual screen redraw(TRUE); // re-draw the screen } //----- Come here when we get a continue signal ------------------- static void cont_sig(int sig ATTRIBUTE_UNUSED) { rawmode(); // terminal to "raw" last_status_cksum = 0; // force status update redraw(TRUE); // re-draw the screen signal(SIGTSTP, suspend_sig); signal(SIGCONT, SIG_DFL); kill(my_pid, SIGCONT); } //----- Come here when we get a Suspend signal ------------------- static void suspend_sig(int sig ATTRIBUTE_UNUSED) { place_cursor(rows - 1, 0, FALSE); // go to bottom of screen clear_to_eol(); // Erase to end of line cookmode(); // terminal to "cooked" signal(SIGCONT, cont_sig); signal(SIGTSTP, SIG_DFL); kill(my_pid, SIGTSTP); } //----- Come here when we get a signal --------------------------- static void catch_sig(int sig) { signal(SIGINT, catch_sig); if (sig) longjmp(restart, sig); } #endif /* FEATURE_VI_USE_SIGNALS */ static int mysleep(int hund) // sleep for 'h' 1/100 seconds { // Don't hang- Wait 5/100 seconds- 1 Sec= 1000000 fflush(stdout); FD_ZERO(&rfds); FD_SET(0, &rfds); tv.tv_sec = 0; tv.tv_usec = hund * 10000; select(1, &rfds, NULL, NULL, &tv); return FD_ISSET(0, &rfds); } #define readbuffer bb_common_bufsiz1 static int readed_for_parse; //----- IO Routines -------------------------------------------- static char readit(void) // read (maybe cursor) key from stdin { char c; int n; struct esc_cmds { const char *seq; char val; }; static const struct esc_cmds esccmds[] = { {"OA", VI_K_UP}, // cursor key Up {"OB", VI_K_DOWN}, // cursor key Down {"OC", VI_K_RIGHT}, // Cursor Key Right {"OD", VI_K_LEFT}, // cursor key Left {"OH", VI_K_HOME}, // Cursor Key Home {"OF", VI_K_END}, // Cursor Key End {"[A", VI_K_UP}, // cursor key Up {"[B", VI_K_DOWN}, // cursor key Down {"[C", VI_K_RIGHT}, // Cursor Key Right {"[D", VI_K_LEFT}, // cursor key Left {"[H", VI_K_HOME}, // Cursor Key Home {"[F", VI_K_END}, // Cursor Key End {"[1~", VI_K_HOME}, // Cursor Key Home {"[2~", VI_K_INSERT}, // Cursor Key Insert {"[4~", VI_K_END}, // Cursor Key End {"[5~", VI_K_PAGEUP}, // Cursor Key Page Up {"[6~", VI_K_PAGEDOWN},// Cursor Key Page Down {"OP", VI_K_FUN1}, // Function Key F1 {"OQ", VI_K_FUN2}, // Function Key F2 {"OR", VI_K_FUN3}, // Function Key F3 {"OS", VI_K_FUN4}, // Function Key F4 {"[15~", VI_K_FUN5}, // Function Key F5 {"[17~", VI_K_FUN6}, // Function Key F6 {"[18~", VI_K_FUN7}, // Function Key F7 {"[19~", VI_K_FUN8}, // Function Key F8 {"[20~", VI_K_FUN9}, // Function Key F9 {"[21~", VI_K_FUN10}, // Function Key F10 {"[23~", VI_K_FUN11}, // Function Key F11 {"[24~", VI_K_FUN12}, // Function Key F12 {"[11~", VI_K_FUN1}, // Function Key F1 {"[12~", VI_K_FUN2}, // Function Key F2 {"[13~", VI_K_FUN3}, // Function Key F3 {"[14~", VI_K_FUN4}, // Function Key F4 }; #define ESCCMDS_COUNT (sizeof(esccmds)/sizeof(struct esc_cmds)) alarm(0); // turn alarm OFF while we wait for input fflush(stdout); n = readed_for_parse; // get input from User- are there already input chars in Q? if (n <= 0) { ri0: // the Q is empty, wait for a typed char n = read(0, readbuffer, BUFSIZ - 1); if (n < 0) { if (errno == EINTR) goto ri0; // interrupted sys call if (errno == EBADF) editing = 0; if (errno == EFAULT) editing = 0; if (errno == EINVAL) editing = 0; if (errno == EIO) editing = 0; errno = 0; } if (n <= 0) return 0; // error if (readbuffer[0] == 27) { // This is an ESC char. Is this Esc sequence? // Could be bare Esc key. See if there are any // more chars to read after the ESC. This would // be a Function or Cursor Key sequence. FD_ZERO(&rfds); FD_SET(0, &rfds); tv.tv_sec = 0; tv.tv_usec = 50000; // Wait 5/100 seconds- 1 Sec=1000000 // keep reading while there are input chars and room in buffer while (select(1, &rfds, NULL, NULL, &tv) > 0 && n <= (BUFSIZ - 5)) { // read the rest of the ESC string int r = read(0, (void *) (readbuffer + n), BUFSIZ - n); if (r > 0) { n += r; } } } readed_for_parse = n; } c = readbuffer[0]; if (c == 27 && n > 1) { // Maybe cursor or function key? const struct esc_cmds *eindex; for (eindex = esccmds; eindex < &esccmds[ESCCMDS_COUNT]; eindex++) { int cnt = strlen(eindex->seq); if (n <= cnt) continue; if (strncmp(eindex->seq, readbuffer + 1, cnt)) continue; // is a Cursor key- put derived value back into Q c = eindex->val; // for squeeze out the ESC sequence n = cnt + 1; break; } if (eindex == &esccmds[ESCCMDS_COUNT]) { /* defined ESC sequence not found, set only one ESC */ n = 1; } } else { n = 1; } // remove key sequence from Q readed_for_parse -= n; memmove(readbuffer, readbuffer + n, BUFSIZ - n); alarm(3); // we are done waiting for input, turn alarm ON return c; } //----- IO Routines -------------------------------------------- static char get_one_char(void) { static char c; #if ENABLE_FEATURE_VI_DOT_CMD // ! adding2q && ioq == 0 read() // ! adding2q && ioq != 0 *ioq // adding2q *last_modifying_cmd= read() if (!adding2q) { // we are not adding to the q. // but, we may be reading from a q if (ioq == 0) { // there is no current q, read from STDIN c = readit(); // get the users input } else { // there is a queue to get chars from first c = *ioq++; if (c == '\0') { // the end of the q, read from STDIN free(ioq_start); ioq_start = ioq = 0; c = readit(); // get the users input } } } else { // adding STDIN chars to q c = readit(); // get the users input if (last_modifying_cmd != 0) { int len = strlen(last_modifying_cmd); if (len + 1 >= BUFSIZ) { psbs("last_modifying_cmd overrun"); } else { // add new char to q last_modifying_cmd[len] = c; } } } #else c = readit(); // get the users input #endif /* FEATURE_VI_DOT_CMD */ return c; // return the char, where ever it came from } static char *get_input_line(const char * prompt) // get input line- use "status line" { static char *obufp; char buf[BUFSIZ]; char c; int i; strcpy(buf, prompt); last_status_cksum = 0; // force status update place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen clear_to_eol(); // clear the line write1(prompt); // write out the :, /, or ? prompt i = strlen(buf); while (i < BUFSIZ) { c = get_one_char(); // read user input if (c == '\n' || c == '\r' || c == 27) break; // is this end of input if (c == erase_char || c == 8 || c == 127) { // user wants to erase prev char i--; // backup to prev char buf[i] = '\0'; // erase the char buf[i + 1] = '\0'; // null terminate buffer write1("\b \b"); // erase char on screen if (i <= 0) { // user backs up before b-o-l, exit break; } } else { buf[i] = c; // save char in buffer buf[i + 1] = '\0'; // make sure buffer is null terminated putchar(c); // echo the char back to user i++; } } refresh(FALSE); free(obufp); obufp = xstrdup(buf); return obufp; } static int file_size(const char * fn) // what is the byte size of "fn" { struct stat st_buf; int cnt, sr; if (!fn || !fn[0]) return -1; cnt = -1; sr = stat(fn, &st_buf); // see if file exists if (sr >= 0) { cnt = (int) st_buf.st_size; } return cnt; } static int file_insert(char * fn, char * p, int size) { int fd, cnt; cnt = -1; #if ENABLE_FEATURE_VI_READONLY readonly = FALSE; #endif if (!fn || !fn[0]) { psbs("No filename given"); goto fi0; } if (size == 0) { // OK- this is just a no-op cnt = 0; goto fi0; } if (size < 0) { psbs("Trying to insert a negative number (%d) of characters", size); goto fi0; } if (p < text || p > end) { psbs("Trying to insert file outside of memory"); goto fi0; } // see if we can open the file #if ENABLE_FEATURE_VI_READONLY if (vi_readonly) goto fi1; // do not try write-mode #endif fd = open(fn, O_RDWR); // assume read & write if (fd < 0) { // could not open for writing- maybe file is read only #if ENABLE_FEATURE_VI_READONLY fi1: #endif fd = open(fn, O_RDONLY); // try read-only if (fd < 0) { psbs("\"%s\" %s", fn, "cannot open file"); goto fi0; } #if ENABLE_FEATURE_VI_READONLY // got the file- read-only readonly = TRUE; #endif } p = text_hole_make(p, size); cnt = read(fd, p, size); close(fd); if (cnt < 0) { cnt = -1; p = text_hole_delete(p, p + size - 1); // un-do buffer insert psbs("cannot read file \"%s\"", fn); } else if (cnt < size) { // There was a partial read, shrink unused space text[] p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert psbs("cannot read all of file \"%s\"", fn); } if (cnt >= size) file_modified++; fi0: return cnt; } static int file_write(char * fn, char * first, char * last) { int fd, cnt, charcnt; if (fn == 0) { psbs("No current filename"); return -2; } charcnt = 0; // FIXIT- use the correct umask() fd = open(fn, (O_WRONLY | O_CREAT | O_TRUNC), 0664); if (fd < 0) return -1; cnt = last - first + 1; charcnt = write(fd, first, cnt); if (charcnt == cnt) { // good write //file_modified = FALSE; // the file has not been modified } else { charcnt = 0; } close(fd); return charcnt; } //----- Terminal Drawing --------------------------------------- // The terminal is made up of 'rows' line of 'columns' columns. // classically this would be 24 x 80. // screen coordinates // 0,0 ... 0,79 // 1,0 ... 1,79 // . ... . // . ... . // 22,0 ... 22,79 // 23,0 ... 23,79 status line // //----- Move the cursor to row x col (count from 0, not 1) ------- static void place_cursor(int row, int col, int opti) { char cm1[BUFSIZ]; char *cm; #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR char cm2[BUFSIZ]; char *screenp; // char cm3[BUFSIZ]; int Rrow = last_row; #endif memset(cm1, '\0', BUFSIZ - 1); // clear the buffer if (row < 0) row = 0; if (row >= rows) row = rows - 1; if (col < 0) col = 0; if (col >= columns) col = columns - 1; //----- 1. Try the standard terminal ESC sequence sprintf(cm1, CMrc, row + 1, col + 1); cm = cm1; if (!opti) goto pc0; #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR //----- find the minimum # of chars to move cursor ------------- //----- 2. Try moving with discreet chars (Newline, [back]space, ...) memset(cm2, '\0', BUFSIZ - 1); // clear the buffer // move to the correct row while (row < Rrow) { // the cursor has to move up strcat(cm2, CMup); Rrow--; } while (row > Rrow) { // the cursor has to move down strcat(cm2, CMdown); Rrow++; } // now move to the correct column strcat(cm2, "\r"); // start at col 0 // just send out orignal source char to get to correct place screenp = &screen[row * columns]; // start of screen line strncat(cm2, screenp, col); //----- 3. Try some other way of moving cursor //--------------------------------------------- // pick the shortest cursor motion to send out cm = cm1; if (strlen(cm2) < strlen(cm)) { cm = cm2; } /* else if (strlen(cm3) < strlen(cm)) { cm= cm3; } */ #endif /* FEATURE_VI_OPTIMIZE_CURSOR */ pc0: write1(cm); // move the cursor } //----- Erase from cursor to end of line ----------------------- static void clear_to_eol(void) { write1(Ceol); // Erase from cursor to end of line } //----- Erase from cursor to end of screen ----------------------- static void clear_to_eos(void) { write1(Ceos); // Erase from cursor to end of screen } //----- Start standout mode ------------------------------------ static void standout_start(void) // send "start reverse video" sequence { write1(SOs); // Start reverse video mode } //----- End standout mode -------------------------------------- static void standout_end(void) // send "end reverse video" sequence { write1(SOn); // End reverse video mode } //----- Flash the screen -------------------------------------- static void flash(int h) { standout_start(); // send "start reverse video" sequence redraw(TRUE); mysleep(h); standout_end(); // send "end reverse video" sequence redraw(TRUE); } static void Indicate_Error(void) { #if ENABLE_FEATURE_VI_CRASHME if (crashme > 0) return; // generate a random command #endif if (!err_method) { write1(bell); // send out a bell character } else { flash(10); } } //----- Screen[] Routines -------------------------------------- //----- Erase the Screen[] memory ------------------------------ static void screen_erase(void) { memset(screen, ' ', screensize); // clear new screen } static int bufsum(char *buf, int count) { int sum = 0; char *e = buf + count; while (buf < e) sum += (unsigned char) *buf++; return sum; } //----- Draw the status line at bottom of the screen ------------- static void show_status_line(void) { int cnt = 0, cksum = 0; // either we already have an error or status message, or we // create one. if (!have_status_msg) { cnt = format_edit_status(); cksum = bufsum(status_buffer, cnt); } if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) { last_status_cksum= cksum; // remember if we have seen this line place_cursor(rows - 1, 0, FALSE); // put cursor on status line write1(status_buffer); clear_to_eol(); if (have_status_msg) { if (((int)strlen(status_buffer) - (have_status_msg - 1)) > (columns - 1) ) { have_status_msg = 0; Hit_Return(); } have_status_msg = 0; } place_cursor(crow, ccol, FALSE); // put cursor back in correct place } fflush(stdout); } //----- format the status buffer, the bottom line of screen ------ // format status buffer, with STANDOUT mode static void psbs(const char *format, ...) { va_list args; va_start(args, format); strcpy(status_buffer, SOs); // Terminal standout mode on vsprintf(status_buffer + strlen(status_buffer), format, args); strcat(status_buffer, SOn); // Terminal standout mode off va_end(args); have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2; } // format status buffer static void psb(const char *format, ...) { va_list args; va_start(args, format); vsprintf(status_buffer, format, args); va_end(args); have_status_msg = 1; } static void ni(const char * s) // display messages { char buf[BUFSIZ]; print_literal(buf, s); psbs("\'%s\' is not implemented", buf); } static int format_edit_status(void) // show file status on status line { static int tot; int cur, percent, ret, trunc_at; // file_modified is now a counter rather than a flag. this // helps reduce the amount of line counting we need to do. // (this will cause a mis-reporting of modified status // once every MAXINT editing operations.) // it would be nice to do a similar optimization here -- if // we haven't done a motion that could have changed which line // we're on, then we shouldn't have to do this count_lines() cur = count_lines(text, dot); // reduce counting -- the total lines can't have // changed if we haven't done any edits. if (file_modified != last_file_modified) { tot = cur + count_lines(dot, end - 1) - 1; last_file_modified = file_modified; } // current line percent // ------------- ~~ ---------- // total lines 100 if (tot > 0) { percent = (100 * cur) / tot; } else { cur = tot = 0; percent = 100; } trunc_at = columns < STATUS_BUFFER_LEN-1 ? columns : STATUS_BUFFER_LEN-1; ret = snprintf(status_buffer, trunc_at+1, #if ENABLE_FEATURE_VI_READONLY "%c %s%s%s %d/%d %d%%", #else "%c %s%s %d/%d %d%%", #endif (cmd_mode ? (cmd_mode == 2 ? 'R':'I'):'-'), (cfn != 0 ? cfn : "No file"), #if ENABLE_FEATURE_VI_READONLY ((vi_readonly || readonly) ? " [Read-only]" : ""), #endif (file_modified ? " [modified]" : ""), cur, tot, percent); if (ret >= 0 && ret < trunc_at) return ret; /* it all fit */ return trunc_at; /* had to truncate */ } //----- Force refresh of all Lines ----------------------------- static void redraw(int full_screen) { place_cursor(0, 0, FALSE); // put cursor in correct place clear_to_eos(); // tel terminal to erase display screen_erase(); // erase the internal screen buffer last_status_cksum = 0; // force status update refresh(full_screen); // this will redraw the entire display show_status_line(); } //----- Format a text[] line into a buffer --------------------- static void format_line(char *dest, char *src, int li) { int co; char c; for (co = 0; co < MAX_SCR_COLS; co++) { c = ' '; // assume blank if (li > 0 && co == 0) { c = '~'; // not first line, assume Tilde } // are there chars in text[] and have we gone past the end if (text < end && src < end) { c = *src++; } if (c == '\n') break; if ((c & 0x80) && !Isprint(c)) { c = '.'; } if ((unsigned char)(c) < ' ' || c == 0x7f) { if (c == '\t') { c = ' '; // co % 8 != 7 for (; (co % tabstop) != (tabstop - 1); co++) { dest[co] = c; } } else { dest[co++] = '^'; if (c == 0x7f) c = '?'; else c += '@'; // make it visible } } // the co++ is done here so that the column will // not be overwritten when we blank-out the rest of line dest[co] = c; if (src >= end) break; } } //----- Refresh the changed screen lines ----------------------- // Copy the source line from text[] into the buffer and note // if the current screenline is different from the new buffer. // If they differ then that line needs redrawing on the terminal. // static void refresh(int full_screen) { static int old_offset; int li, changed; char buf[MAX_SCR_COLS]; char *tp, *sp; // pointer into text[] and screen[] #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR int last_li = -2; // last line that changed- for optimizing cursor movement #endif if (ENABLE_FEATURE_VI_WIN_RESIZE) get_terminal_width_height(0, &columns, &rows); sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot") tp = screenbegin; // index into text[] of top line // compare text[] to screen[] and mark screen[] lines that need updating for (li = 0; li < rows - 1; li++) { int cs, ce; // column start & end memset(buf, ' ', MAX_SCR_COLS); // blank-out the buffer buf[MAX_SCR_COLS-1] = 0; // NULL terminate the buffer // format current text line into buf format_line(buf, tp, li); // skip to the end of the current text[] line while (tp < end && *tp++ != '\n') /*no-op*/ ; // see if there are any changes between vitual screen and buf changed = FALSE; // assume no change cs= 0; ce= columns-1; sp = &screen[li * columns]; // start of screen line if (full_screen) { // force re-draw of every single column from 0 - columns-1 goto re0; } // compare newly formatted buffer with virtual screen // look forward for first difference between buf and screen for (; cs <= ce; cs++) { if (buf[cs + offset] != sp[cs]) { changed = TRUE; // mark for redraw break; } } // look backward for last difference between buf and screen for ( ; ce >= cs; ce--) { if (buf[ce + offset] != sp[ce]) { changed = TRUE; // mark for redraw break; } } // now, cs is index of first diff, and ce is index of last diff // if horz offset has changed, force a redraw if (offset != old_offset) { re0: changed = TRUE; } // make a sanity check of columns indexes if (cs < 0) cs= 0; if (ce > columns-1) ce= columns-1; if (cs > ce) { cs= 0; ce= columns-1; } // is there a change between vitual screen and buf if (changed) { // copy changed part of buffer to virtual screen memmove(sp+cs, buf+(cs+offset), ce-cs+1); // move cursor to column of first change if (offset != old_offset) { // opti_cur_move is still too stupid // to handle offsets correctly place_cursor(li, cs, FALSE); } else { #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR // if this just the next line // try to optimize cursor movement // otherwise, use standard ESC sequence place_cursor(li, cs, li == (last_li+1) ? TRUE : FALSE); last_li= li; #else place_cursor(li, cs, FALSE); // use standard ESC sequence #endif /* FEATURE_VI_OPTIMIZE_CURSOR */ } // write line out to terminal { int nic = ce - cs + 1; char *out = sp + cs; while (nic-- > 0) { putchar(*out); out++; } } #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR last_row = li; #endif } } #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR place_cursor(crow, ccol, (crow == last_row) ? TRUE : FALSE); last_row = crow; #else place_cursor(crow, ccol, FALSE); #endif if (offset != old_offset) old_offset = offset; } //--------------------------------------------------------------------- //----- the Ascii Chart ----------------------------------------------- // // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 ' // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f / // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7 // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ? // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _ // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del //--------------------------------------------------------------------- //----- Execute a Vi Command ----------------------------------- static void do_cmd(char c) { const char *msg; char c1, *p, *q, buf[9], *save_dot; int cnt, i, j, dir, yf; c1 = c; // quiet the compiler cnt = yf = dir = 0; // quiet the compiler msg = p = q = save_dot = buf; // quiet the compiler memset(buf, '\0', 9); // clear buf show_status_line(); /* if this is a cursor key, skip these checks */ switch (c) { case VI_K_UP: case VI_K_DOWN: case VI_K_LEFT: case VI_K_RIGHT: case VI_K_HOME: case VI_K_END: case VI_K_PAGEUP: case VI_K_PAGEDOWN: goto key_cmd_mode; } if (cmd_mode == 2) { // flip-flop Insert/Replace mode if (c == VI_K_INSERT) goto dc_i; // we are 'R'eplacing the current *dot with new char if (*dot == '\n') { // don't Replace past E-o-l cmd_mode = 1; // convert to insert } else { if (1 <= c || Isprint(c)) { if (c != 27) dot = yank_delete(dot, dot, 0, YANKDEL); // delete char dot = char_insert(dot, c); // insert new char } goto dc1; } } if (cmd_mode == 1) { // hitting "Insert" twice means "R" replace mode if (c == VI_K_INSERT) goto dc5; // insert the char c at "dot" if (1 <= c || Isprint(c)) { dot = char_insert(dot, c); } goto dc1; } key_cmd_mode: switch (c) { //case 0x01: // soh //case 0x09: // ht //case 0x0b: // vt //case 0x0e: // so //case 0x0f: // si //case 0x10: // dle //case 0x11: // dc1 //case 0x13: // dc3 #if ENABLE_FEATURE_VI_CRASHME case 0x14: // dc4 ctrl-T crashme = (crashme == 0) ? 1 : 0; break; #endif //case 0x16: // syn //case 0x17: // etb //case 0x18: // can //case 0x1c: // fs //case 0x1d: // gs //case 0x1e: // rs //case 0x1f: // us //case '!': // !- //case '#': // #- //case '&': // &- //case '(': // (- //case ')': // )- //case '*': // *- //case ',': // ,- //case '=': // =- //case '@': // @- //case 'F': // F- //case 'K': // K- //case 'Q': // Q- //case 'S': // S- //case 'T': // T- //case 'V': // V- //case '[': // [- //case '\\': // \- //case ']': // ]- //case '_': // _- //case '`': // `- //case 'g': // g- //case 'u': // u- FIXME- there is no undo //case 'v': // v- default: // unrecognised command buf[0] = c; buf[1] = '\0'; if (c < ' ') { buf[0] = '^'; buf[1] = c + '@'; buf[2] = '\0'; } ni(buf); end_cmd_q(); // stop adding to q case 0x00: // nul- ignore break; case 2: // ctrl-B scroll up full screen case VI_K_PAGEUP: // Cursor Key Page Up dot_scroll(rows - 2, -1); break; #if ENABLE_FEATURE_VI_USE_SIGNALS case 0x03: // ctrl-C interrupt longjmp(restart, 1); break; case 26: // ctrl-Z suspend suspend_sig(SIGTSTP); break; #endif case 4: // ctrl-D scroll down half screen dot_scroll((rows - 2) / 2, 1); break; case 5: // ctrl-E scroll down one line dot_scroll(1, 1); break; case 6: // ctrl-F scroll down full screen case VI_K_PAGEDOWN: // Cursor Key Page Down dot_scroll(rows - 2, 1); break; case 7: // ctrl-G show current status last_status_cksum = 0; // force status update break; case 'h': // h- move left case VI_K_LEFT: // cursor key Left case 8: // ctrl-H- move left (This may be ERASE char) case 0x7f: // DEL- move left (This may be ERASE char) if (cmdcnt-- > 1) { do_cmd(c); } // repeat cnt dot_left(); break; case 10: // Newline ^J case 'j': // j- goto next line, same col case VI_K_DOWN: // cursor key Down if (cmdcnt-- > 1) { do_cmd(c); } // repeat cnt dot_next(); // go to next B-o-l dot = move_to_col(dot, ccol + offset); // try stay in same col break; case 12: // ctrl-L force redraw whole screen case 18: // ctrl-R force redraw place_cursor(0, 0, FALSE); // put cursor in correct place clear_to_eos(); // tel terminal to erase display mysleep(10); screen_erase(); // erase the internal screen buffer last_status_cksum = 0; // force status update refresh(TRUE); // this will redraw the entire display break; case 13: // Carriage Return ^M case '+': // +- goto next line if (cmdcnt-- > 1) { do_cmd(c); } // repeat cnt dot_next(); dot_skip_over_ws(); break; case 21: // ctrl-U scroll up half screen dot_scroll((rows - 2) / 2, -1); break; case 25: // ctrl-Y scroll up one line dot_scroll(1, -1); break; case 27: // esc if (cmd_mode == 0) indicate_error(c); cmd_mode = 0; // stop insrting end_cmd_q(); last_status_cksum = 0; // force status update break; case ' ': // move right case 'l': // move right case VI_K_RIGHT: // Cursor Key Right if (cmdcnt-- > 1) { do_cmd(c); } // repeat cnt dot_right(); break; #if ENABLE_FEATURE_VI_YANKMARK case '"': // "- name a register to use for Delete/Yank c1 = get_one_char(); c1 = tolower(c1); if (islower(c1)) { YDreg = c1 - 'a'; } else { indicate_error(c); } break; case '\'': // '- goto a specific mark c1 = get_one_char(); c1 = tolower(c1); if (islower(c1)) { c1 = c1 - 'a'; // get the b-o-l q = mark[(unsigned char) c1]; if (text <= q && q < end) { dot = q; dot_begin(); // go to B-o-l dot_skip_over_ws(); } } else if (c1 == '\'') { // goto previous context dot = swap_context(dot); // swap current and previous context dot_begin(); // go to B-o-l dot_skip_over_ws(); } else { indicate_error(c); } break; case 'm': // m- Mark a line // this is really stupid. If there are any inserts or deletes // between text[0] and dot then this mark will not point to the // correct location! It could be off by many lines! // Well..., at least its quick and dirty. c1 = get_one_char(); c1 = tolower(c1); if (islower(c1)) { c1 = c1 - 'a'; // remember the line mark[(int) c1] = dot; } else { indicate_error(c); } break; case 'P': // P- Put register before case 'p': // p- put register after p = reg[YDreg]; if (p == 0) { psbs("Nothing in register %c", what_reg()); break; } // are we putting whole lines or strings if (strchr(p, '\n') != NULL) { if (c == 'P') { dot_begin(); // putting lines- Put above } if (c == 'p') { // are we putting after very last line? if (end_line(dot) == (end - 1)) { dot = end; // force dot to end of text[] } else { dot_next(); // next line, then put before } } } else { if (c == 'p') dot_right(); // move to right, can move to NL } dot = string_insert(dot, p); // insert the string end_cmd_q(); // stop adding to q break; case 'U': // U- Undo; replace current line with original version if (reg[Ureg] != 0) { p = begin_line(dot); q = end_line(dot); p = text_hole_delete(p, q); // delete cur line p = string_insert(p, reg[Ureg]); // insert orig line dot = p; dot_skip_over_ws(); } break; #endif /* FEATURE_VI_YANKMARK */ case '$': // $- goto end of line case VI_K_END: // Cursor Key End if (cmdcnt-- > 1) { do_cmd(c); } // repeat cnt dot = end_line(dot); break; case '%': // %- find matching char of pair () [] {} for (q = dot; q < end && *q != '\n'; q++) { if (strchr("()[]{}", *q) != NULL) { // we found half of a pair p = find_pair(q, *q); if (p == NULL) { indicate_error(c); } else { dot = p; } break; } } if (*q == '\n') indicate_error(c); break; case 'f': // f- forward to a user specified char last_forward_char = get_one_char(); // get the search char // // dont separate these two commands. 'f' depends on ';' // //**** fall thru to ... ';' case ';': // ;- look at rest of line for last forward char if (cmdcnt-- > 1) { do_cmd(';'); } // repeat cnt if (last_forward_char == 0) break; q = dot + 1; while (q < end - 1 && *q != '\n' && *q != last_forward_char) { q++; } if (*q == last_forward_char) dot = q; break; case '-': // -- goto prev line if (cmdcnt-- > 1) { do_cmd(c); } // repeat cnt dot_prev(); dot_skip_over_ws(); break; #if ENABLE_FEATURE_VI_DOT_CMD case '.': // .- repeat the last modifying command // Stuff the last_modifying_cmd back into stdin // and let it be re-executed. if (last_modifying_cmd != 0) { ioq = ioq_start = xstrdup(last_modifying_cmd); } break; #endif #if ENABLE_FEATURE_VI_SEARCH case '?': // /- search for a pattern case '/': // /- search for a pattern buf[0] = c; buf[1] = '\0'; q = get_input_line(buf); // get input line- use "status line" if (q[0] && !q[1]) goto dc3; // if no pat re-use old pat if (q[0]) { // strlen(q) > 1: new pat- save it and find // there is a new pat free(last_search_pattern); last_search_pattern = xstrdup(q); goto dc3; // now find the pattern } // user changed mind and erased the "/"- do nothing break; case 'N': // N- backward search for last pattern if (cmdcnt-- > 1) { do_cmd(c); } // repeat cnt dir = BACK; // assume BACKWARD search p = dot - 1; if (last_search_pattern[0] == '?') { dir = FORWARD; p = dot + 1; } goto dc4; // now search for pattern break; case 'n': // n- repeat search for last pattern // search rest of text[] starting at next char // if search fails return orignal "p" not the "p+1" address if (cmdcnt-- > 1) { do_cmd(c); } // repeat cnt dc3: if (last_search_pattern == 0) { msg = "No previous regular expression"; goto dc2; } if (last_search_pattern[0] == '/') { dir = FORWARD; // assume FORWARD search p = dot + 1; } if (last_search_pattern[0] == '?') { dir = BACK; p = dot - 1; } dc4: q = char_search(p, last_search_pattern + 1, dir, FULL); if (q != NULL) { dot = q; // good search, update "dot" msg = ""; goto dc2; } // no pattern found between "dot" and "end"- continue at top p = text; if (dir == BACK) { p = end - 1; } q = char_search(p, last_search_pattern + 1, dir, FULL); if (q != NULL) { // found something dot = q; // found new pattern- goto it msg = "search hit BOTTOM, continuing at TOP"; if (dir == BACK) { msg = "search hit TOP, continuing at BOTTOM"; } } else { msg = "Pattern not found"; } dc2: if (*msg) psbs("%s", msg); break; case '{': // {- move backward paragraph q = char_search(dot, "\n\n", BACK, FULL); if (q != NULL) { // found blank line dot = next_line(q); // move to next blank line } break; case '}': // }- move forward paragraph q = char_search(dot, "\n\n", FORWARD, FULL); if (q != NULL) { // found blank line dot = next_line(q); // move to next blank line } break; #endif /* FEATURE_VI_SEARCH */ case '0': // 0- goto begining of line case '1': // 1- case '2': // 2- case '3': // 3- case '4': // 4- case '5': // 5- case '6': // 6- case '7': // 7- case '8': // 8- case '9': // 9- if (c == '0' && cmdcnt < 1) { dot_begin(); // this was a standalone zero } else { cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number } break; case ':': // :- the colon mode commands p = get_input_line(":"); // get input line- use "status line" #if ENABLE_FEATURE_VI_COLON colon(p); // execute the command #else if (*p == ':') p++; // move past the ':' cnt = strlen(p); if (cnt <= 0) break; if (strncasecmp(p, "quit", cnt) == 0 || strncasecmp(p, "q!", cnt) == 0 // delete lines ) { if (file_modified && p[1] != '!') { psbs("No write since last change (:quit! overrides)"); } else { editing = 0; } } else if (strncasecmp(p, "write", cnt) == 0 || strncasecmp(p, "wq", cnt) == 0 || strncasecmp(p, "wn", cnt) == 0 || strncasecmp(p, "x", cnt) == 0 ) { cnt = file_write(cfn, text, end - 1); if (cnt < 0) { if (cnt == -1) psbs("Write error: %s", strerror(errno)); } else { file_modified = 0; last_file_modified = -1; psb("\"%s\" %dL, %dC", cfn, count_lines(text, end - 1), cnt); if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n' || p[0] == 'X' || p[1] == 'Q' || p[1] == 'N' ) { editing = 0; } } } else if (strncasecmp(p, "file", cnt) == 0 ) { last_status_cksum = 0; // force status update } else if (sscanf(p, "%d", &j) > 0) { dot = find_line(j); // go to line # j dot_skip_over_ws(); } else { // unrecognised cmd ni(p); } #endif /* !FEATURE_VI_COLON */ break; case '<': // <- Left shift something case '>': // >- Right shift something cnt = count_lines(text, dot); // remember what line we are on c1 = get_one_char(); // get the type of thing to delete find_range(&p, &q, c1); yank_delete(p, q, 1, YANKONLY); // save copy before change p = begin_line(p); q = end_line(q); i = count_lines(p, q); // # of lines we are shifting for ( ; i > 0; i--, p = next_line(p)) { if (c == '<') { // shift left- remove tab or 8 spaces if (*p == '\t') { // shrink buffer 1 char text_hole_delete(p, p); } else if (*p == ' ') { // we should be calculating columns, not just SPACE for (j = 0; *p == ' ' && j < tabstop; j++) { text_hole_delete(p, p); } } } else if (c == '>') { // shift right -- add tab or 8 spaces char_insert(p, '\t'); } } dot = find_line(cnt); // what line were we on dot_skip_over_ws(); end_cmd_q(); // stop adding to q break; case 'A': // A- append at e-o-l dot_end(); // go to e-o-l //**** fall thru to ... 'a' case 'a': // a- append after current char if (*dot != '\n') dot++; goto dc_i; break; case 'B': // B- back a blank-delimited Word case 'E': // E- end of a blank-delimited word case 'W': // W- forward a blank-delimited word if (cmdcnt-- > 1) { do_cmd(c); } // repeat cnt dir = FORWARD; if (c == 'B') dir = BACK; if (c == 'W' || isspace(dot[dir])) { dot = skip_thing(dot, 1, dir, S_TO_WS); dot = skip_thing(dot, 2, dir, S_OVER_WS); } if (c != 'W') dot = skip_thing(dot, 1, dir, S_BEFORE_WS); break; case 'C': // C- Change to e-o-l case 'D': // D- delete to e-o-l save_dot = dot; dot = dollar_line(dot); // move to before NL // copy text into a register and delete dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l if (c == 'C') goto dc_i; // start inserting #if ENABLE_FEATURE_VI_DOT_CMD if (c == 'D') end_cmd_q(); // stop adding to q #endif break; case 'G': // G- goto to a line number (default= E-O-F) dot = end - 1; // assume E-O-F if (cmdcnt > 0) { dot = find_line(cmdcnt); // what line is #cmdcnt } dot_skip_over_ws(); break; case 'H': // H- goto top line on screen dot = screenbegin; if (cmdcnt > (rows - 1)) { cmdcnt = (rows - 1); } if (cmdcnt-- > 1) { do_cmd('+'); } // repeat cnt dot_skip_over_ws(); break; case 'I': // I- insert before first non-blank dot_begin(); // 0 dot_skip_over_ws(); //**** fall thru to ... 'i' case 'i': // i- insert before current char case VI_K_INSERT: // Cursor Key Insert dc_i: cmd_mode = 1; // start insrting break; case 'J': // J- join current and next lines together if (cmdcnt-- > 2) { do_cmd(c); } // repeat cnt dot_end(); // move to NL if (dot < end - 1) { // make sure not last char in text[] *dot++ = ' '; // replace NL with space file_modified++; while (isblnk(*dot)) { // delete leading WS dot_delete(); } } end_cmd_q(); // stop adding to q break; case 'L': // L- goto bottom line on screen dot = end_screen(); if (cmdcnt > (rows - 1)) { cmdcnt = (rows - 1); } if (cmdcnt-- > 1) { do_cmd('-'); } // repeat cnt dot_begin(); dot_skip_over_ws(); break; case 'M': // M- goto middle line on screen dot = screenbegin; for (cnt = 0; cnt < (rows-1) / 2; cnt++) dot = next_line(dot); break; case 'O': // O- open a empty line above // 0i\n ESC -i p = begin_line(dot); if (p[-1] == '\n') { dot_prev(); case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..." dot_end(); dot = char_insert(dot, '\n'); } else { dot_begin(); // 0 dot = char_insert(dot, '\n'); // i\n ESC dot_prev(); // - } goto dc_i; break; case 'R': // R- continuous Replace char dc5: cmd_mode = 2; break; case 'X': // X- delete char before dot case 'x': // x- delete the current char case 's': // s- substitute the current char if (cmdcnt-- > 1) { do_cmd(c); } // repeat cnt dir = 0; if (c == 'X') dir = -1; if (dot[dir] != '\n') { if (c == 'X') dot--; // delete prev char dot = yank_delete(dot, dot, 0, YANKDEL); // delete char } if (c == 's') goto dc_i; // start insrting end_cmd_q(); // stop adding to q break; case 'Z': // Z- if modified, {write}; exit // ZZ means to save file (if necessary), then exit c1 = get_one_char(); if (c1 != 'Z') { indicate_error(c); break; } if (file_modified) { #if ENABLE_FEATURE_VI_READONLY if (vi_readonly || readonly) { psbs("\"%s\" File is read only", cfn); break; } #endif cnt = file_write(cfn, text, end - 1); if (cnt < 0) { if (cnt == -1) psbs("Write error: %s", strerror(errno)); } else if (cnt == (end - 1 - text + 1)) { editing = 0; } } else { editing = 0; } break; case '^': // ^- move to first non-blank on line dot_begin(); dot_skip_over_ws(); break; case 'b': // b- back a word case 'e': // e- end of word if (cmdcnt-- > 1) { do_cmd(c); } // repeat cnt dir = FORWARD; if (c == 'b') dir = BACK; if ((dot + dir) < text || (dot + dir) > end - 1) break; dot += dir; if (isspace(*dot)) { dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS); } if (isalnum(*dot) || *dot == '_') { dot = skip_thing(dot, 1, dir, S_END_ALNUM); } else if (ispunct(*dot)) { dot = skip_thing(dot, 1, dir, S_END_PUNCT); } break; case 'c': // c- change something case 'd': // d- delete something #if ENABLE_FEATURE_VI_YANKMARK case 'y': // y- yank something case 'Y': // Y- Yank a line #endif yf = YANKDEL; // assume either "c" or "d" #if ENABLE_FEATURE_VI_YANKMARK if (c == 'y' || c == 'Y') yf = YANKONLY; #endif c1 = 'y'; if (c != 'Y') c1 = get_one_char(); // get the type of thing to delete find_range(&p, &q, c1); if (c1 == 27) { // ESC- user changed mind and wants out c = c1 = 27; // Escape- do nothing } else if (strchr("wW", c1)) { if (c == 'c') { // don't include trailing WS as part of word while (isblnk(*q)) { if (q <= text || q[-1] == '\n') break; q--; } } dot = yank_delete(p, q, 0, yf); // delete word } else if (strchr("^0bBeEft$", c1)) { // single line copy text into a register and delete dot = yank_delete(p, q, 0, yf); // delete word } else if (strchr("cdykjHL%+-{}\r\n", c1)) { // multiple line copy text into a register and delete dot = yank_delete(p, q, 1, yf); // delete lines if (c == 'c') { dot = char_insert(dot, '\n'); // on the last line of file don't move to prev line if (dot != (end-1)) { dot_prev(); } } else if (c == 'd') { dot_begin(); dot_skip_over_ws(); } } else { // could not recognize object c = c1 = 27; // error- indicate_error(c); } if (c1 != 27) { // if CHANGING, not deleting, start inserting after the delete if (c == 'c') { strcpy(buf, "Change"); goto dc_i; // start inserting } if (c == 'd') { strcpy(buf, "Delete"); } #if ENABLE_FEATURE_VI_YANKMARK if (c == 'y' || c == 'Y') { strcpy(buf, "Yank"); } p = reg[YDreg]; q = p + strlen(p); for (cnt = 0; p <= q; p++) { if (*p == '\n') cnt++; } psb("%s %d lines (%d chars) using [%c]", buf, cnt, strlen(reg[YDreg]), what_reg()); #endif end_cmd_q(); // stop adding to q } break; case 'k': // k- goto prev line, same col case VI_K_UP: // cursor key Up if (cmdcnt-- > 1) { do_cmd(c); } // repeat cnt dot_prev(); dot = move_to_col(dot, ccol + offset); // try stay in same col break; case 'r': // r- replace the current char with user input c1 = get_one_char(); // get the replacement char if (*dot != '\n') { *dot = c1; file_modified++; // has the file been modified } end_cmd_q(); // stop adding to q break; case 't': // t- move to char prior to next x last_forward_char = get_one_char(); do_cmd(';'); if (*dot == last_forward_char) dot_left(); last_forward_char= 0; break; case 'w': // w- forward a word if (cmdcnt-- > 1) { do_cmd(c); } // repeat cnt if (isalnum(*dot) || *dot == '_') { // we are on ALNUM dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM); } else if (ispunct(*dot)) { // we are on PUNCT dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT); } if (dot < end - 1) dot++; // move over word if (isspace(*dot)) { dot = skip_thing(dot, 2, FORWARD, S_OVER_WS); } break; case 'z': // z- c1 = get_one_char(); // get the replacement char cnt = 0; if (c1 == '.') cnt = (rows - 2) / 2; // put dot at center if (c1 == '-') cnt = rows - 2; // put dot at bottom screenbegin = begin_line(dot); // start dot at top dot_scroll(cnt, -1); break; case '|': // |- move to column "cmdcnt" dot = move_to_col(dot, cmdcnt - 1); // try to move to column break; case '~': // ~- flip the case of letters a-z -> A-Z if (cmdcnt-- > 1) { do_cmd(c); } // repeat cnt if (islower(*dot)) { *dot = toupper(*dot); file_modified++; // has the file been modified } else if (isupper(*dot)) { *dot = tolower(*dot); file_modified++; // has the file been modified } dot_right(); end_cmd_q(); // stop adding to q break; //----- The Cursor and Function Keys ----------------------------- case VI_K_HOME: // Cursor Key Home dot_begin(); break; // The Fn keys could point to do_macro which could translate them case VI_K_FUN1: // Function Key F1 case VI_K_FUN2: // Function Key F2 case VI_K_FUN3: // Function Key F3 case VI_K_FUN4: // Function Key F4 case VI_K_FUN5: // Function Key F5 case VI_K_FUN6: // Function Key F6 case VI_K_FUN7: // Function Key F7 case VI_K_FUN8: // Function Key F8 case VI_K_FUN9: // Function Key F9 case VI_K_FUN10: // Function Key F10 case VI_K_FUN11: // Function Key F11 case VI_K_FUN12: // Function Key F12 break; } dc1: // if text[] just became empty, add back an empty line if (end == text) { char_insert(text, '\n'); // start empty buf with dummy line dot = text; } // it is OK for dot to exactly equal to end, otherwise check dot validity if (dot != end) { dot = bound_dot(dot); // make sure "dot" is valid } #if ENABLE_FEATURE_VI_YANKMARK check_context(c); // update the current context #endif if (!isdigit(c)) cmdcnt = 0; // cmd was not a number, reset cmdcnt cnt = dot - begin_line(dot); // Try to stay off of the Newline if (*dot == '\n' && cnt > 0 && cmd_mode == 0) dot--; } #if ENABLE_FEATURE_VI_CRASHME static int totalcmds = 0; static int Mp = 85; // Movement command Probability static int Np = 90; // Non-movement command Probability static int Dp = 96; // Delete command Probability static int Ip = 97; // Insert command Probability static int Yp = 98; // Yank command Probability static int Pp = 99; // Put command Probability static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0; const char chars[20] = "\t012345 abcdABCD-=.$"; const char *const words[20] = { "this", "is", "a", "test", "broadcast", "the", "emergency", "of", "system", "quick", "brown", "fox", "jumped", "over", "lazy", "dogs", "back", "January", "Febuary", "March" }; const char *const lines[20] = { "You should have received a copy of the GNU General Public License\n", "char c, cm, *cmd, *cmd1;\n", "generate a command by percentages\n", "Numbers may be typed as a prefix to some commands.\n", "Quit, discarding changes!\n", "Forced write, if permission originally not valid.\n", "In general, any ex or ed command (such as substitute or delete).\n", "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n", "Please get w/ me and I will go over it with you.\n", "The following is a list of scheduled, committed changes.\n", "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n", "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n", "Any question about transactions please contact Sterling Huxley.\n", "I will try to get back to you by Friday, December 31.\n", "This Change will be implemented on Friday.\n", "Let me know if you have problems accessing this;\n", "Sterling Huxley recently added you to the access list.\n", "Would you like to go to lunch?\n", "The last command will be automatically run.\n", "This is too much english for a computer geek.\n", }; char *multilines[20] = { "You should have received a copy of the GNU General Public License\n", "char c, cm, *cmd, *cmd1;\n", "generate a command by percentages\n", "Numbers may be typed as a prefix to some commands.\n", "Quit, discarding changes!\n", "Forced write, if permission originally not valid.\n", "In general, any ex or ed command (such as substitute or delete).\n", "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n", "Please get w/ me and I will go over it with you.\n", "The following is a list of scheduled, committed changes.\n", "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n", "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n", "Any question about transactions please contact Sterling Huxley.\n", "I will try to get back to you by Friday, December 31.\n", "This Change will be implemented on Friday.\n", "Let me know if you have problems accessing this;\n", "Sterling Huxley recently added you to the access list.\n", "Would you like to go to lunch?\n", "The last command will be automatically run.\n", "This is too much english for a computer geek.\n", }; // create a random command to execute static void crash_dummy() { static int sleeptime; // how long to pause between commands char c, cm, *cmd, *cmd1; int i, cnt, thing, rbi, startrbi, percent; // "dot" movement commands cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL"; // is there already a command running? if (readed_for_parse > 0) goto cd1; cd0: startrbi = rbi = 0; sleeptime = 0; // how long to pause between commands memset(readbuffer, '\0', BUFSIZ); // clear the read buffer // generate a command by percentages percent = (int) lrand48() % 100; // get a number from 0-99 if (percent < Mp) { // Movement commands // available commands cmd = cmd1; M++; } else if (percent < Np) { // non-movement commands cmd = "mz<>\'\""; // available commands N++; } else if (percent < Dp) { // Delete commands cmd = "dx"; // available commands D++; } else if (percent < Ip) { // Inset commands cmd = "iIaAsrJ"; // available commands I++; } else if (percent < Yp) { // Yank commands cmd = "yY"; // available commands Y++; } else if (percent < Pp) { // Put commands cmd = "pP"; // available commands P++; } else { // We do not know how to handle this command, try again U++; goto cd0; } // randomly pick one of the available cmds from "cmd[]" i = (int) lrand48() % strlen(cmd); cm = cmd[i]; if (strchr(":\024", cm)) goto cd0; // dont allow colon or ctrl-T commands readbuffer[rbi++] = cm; // put cmd into input buffer // now we have the command- // there are 1, 2, and multi char commands // find out which and generate the rest of command as necessary if (strchr("dmryz<>\'\"", cm)) { // 2-char commands cmd1 = " \n\r0$^-+wWeEbBhjklHL"; if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[] cmd1 = "abcdefghijklmnopqrstuvwxyz"; } thing = (int) lrand48() % strlen(cmd1); // pick a movement command c = cmd1[thing]; readbuffer[rbi++] = c; // add movement to input buffer } if (strchr("iIaAsc", cm)) { // multi-char commands if (cm == 'c') { // change some thing thing = (int) lrand48() % strlen(cmd1); // pick a movement command c = cmd1[thing]; readbuffer[rbi++] = c; // add movement to input buffer } thing = (int) lrand48() % 4; // what thing to insert cnt = (int) lrand48() % 10; // how many to insert for (i = 0; i < cnt; i++) { if (thing == 0) { // insert chars readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))]; } else if (thing == 1) { // insert words strcat(readbuffer, words[(int) lrand48() % 20]); strcat(readbuffer, " "); sleeptime = 0; // how fast to type } else if (thing == 2) { // insert lines strcat(readbuffer, lines[(int) lrand48() % 20]); sleeptime = 0; // how fast to type } else { // insert multi-lines strcat(readbuffer, multilines[(int) lrand48() % 20]); sleeptime = 0; // how fast to type } } strcat(readbuffer, "\033"); } readed_for_parse = strlen(readbuffer); cd1: totalcmds++; if (sleeptime > 0) mysleep(sleeptime); // sleep 1/100 sec } // test to see if there are any errors static void crash_test() { static time_t oldtim; time_t tim; char d[2], msg[BUFSIZ]; msg[0] = '\0'; if (end < text) { strcat(msg, "end textend) { strcat(msg, "end>textend "); } if (dot < text) { strcat(msg, "dot end) { strcat(msg, "dot>end "); } if (screenbegin < text) { strcat(msg, "screenbegin end - 1) { strcat(msg, "screenbegin>end-1 "); } if (msg[0]) { alarm(0); printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s", totalcmds, last_input_char, msg, SOs, SOn); fflush(stdout); while (read(0, d, 1) > 0) { if (d[0] == '\n' || d[0] == '\r') break; } alarm(3); } tim = (time_t) time((time_t *) 0); if (tim >= (oldtim + 3)) { sprintf(status_buffer, "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d", totalcmds, M, N, I, D, Y, P, U, end - text + 1); oldtim = tim; } } #endif