/* 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 "libbb.h" /* the CRASHME code is unmaintained, and doesn't currently build */ #define ENABLE_FEATURE_VI_CRASHME 0 #if ENABLE_LOCALE_SUPPORT #if ENABLE_FEATURE_VI_8BIT #define Isprint(c) isprint(c) #else #define Isprint(c) (isprint(c) && (unsigned char)(c) < 0x7f) #endif #else /* 0x9b is Meta-ESC */ #if ENABLE_FEATURE_VI_8BIT #define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b) #else #define Isprint(c) ((unsigned char)(c) >= ' ' && (unsigned char)(c) < 0x7f) #endif #endif enum { MAX_TABSTOP = 32, // sanity limit // User input len. Need not be extra big. // Lines in file being edited *can* be bigger than this. MAX_INPUT_LEN = 128, // Sanity limits. We have only one buffer of this size. MAX_SCR_COLS = CONFIG_FEATURE_VI_MAX_LEN, MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN, }; /* vt102 typical ESC sequence */ /* terminal standout start/normal ESC sequence */ static const char SOs[] ALIGN1 = "\033[7m"; static const char SOn[] ALIGN1 = "\033[0m"; /* terminal bell sequence */ static const char bell[] ALIGN1 = "\007"; /* Clear-end-of-line and Clear-end-of-screen ESC sequence */ static const char Ceol[] ALIGN1 = "\033[0K"; static const char Ceos[] ALIGN1 = "\033[0J"; /* Cursor motion arbitrary destination ESC sequence */ static const char CMrc[] ALIGN1 = "\033[%d;%dH"; /* Cursor motion up and down ESC sequence */ static const char CMup[] ALIGN1 = "\033[A"; static const char CMdown[] ALIGN1 = "\n"; #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK // cmds modifying text[] // vda: removed "aAiIs" as they switch us into insert mode // and remembering input for replay after them makes no sense static const char modifying_cmds[] = "cCdDJoOpPrRxX<>~"; #endif 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 */ struct globals { /* many references - keep near the top of globals */ char *text, *end; // pointers to the user data in memory char *dot; // where all the action takes place int text_size; // size of the allocated buffer /* the rest */ smallint 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) #if ENABLE_FEATURE_VI_READONLY smallint readonly_mode; #define SET_READONLY_FILE(flags) ((flags) |= 0x01) #define SET_READONLY_MODE(flags) ((flags) |= 0x02) #define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe) #else #define SET_READONLY_FILE(flags) ((void)0) #define SET_READONLY_MODE(flags) ((void)0) #define UNSET_READONLY_FILE(flags) ((void)0) #endif smallint editing; // >0 while we are editing a file // [code audit says "can be 0, 1 or 2 only"] smallint cmd_mode; // 0=command 1=insert 2=replace int file_modified; // buffer contents changed (counter, not flag!) int last_file_modified; // = -1; int fn_start; // index of first cmd line file name int save_argc; // how many file names on cmd line int cmdcnt; // repetition count unsigned rows, columns; // the terminal screen is this size int crow, ccol; // cursor is on Crow x Ccol int offset; // chars scrolled off the screen to the left int have_status_msg; // is default edit status needed? // [don't make smallint!] int last_status_cksum; // hash of current status line char *current_filename; char *screenbegin; // index into text[], of top line on the screen char *screen; // pointer to the virtual screen buffer int screensize; // and its size int tabstop; int last_forward_char; // last char searched for with 'f' (int because of Unicode) char erase_char; // the users erase character char last_input_char; // last char read from user smalluint chars_to_parse; #if ENABLE_FEATURE_VI_DOT_CMD smallint adding2q; // are we currently adding user input to q int lmc_len; // length of last_modifying_cmd char *ioq, *ioq_start; // pointer to string for get_one_char to "read" #endif #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR int last_row; // where the cursor was last moved to #endif #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME int my_pid; #endif #if ENABLE_FEATURE_VI_SEARCH char *last_search_pattern; // last pattern from a '/' or '?' search #endif /* former statics */ #if ENABLE_FEATURE_VI_YANKMARK char *edit_file__cur_line; #endif int refresh__old_offset; int format_edit_status__tot; /* a few references only */ #if ENABLE_FEATURE_VI_YANKMARK int YDreg, Ureg; // default delete register and orig line for "U" char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27 char *mark[28]; // user marks points somewhere in text[]- a-z and previous context '' char *context_start, *context_end; #endif #if ENABLE_FEATURE_VI_USE_SIGNALS sigjmp_buf restart; // catch_sig() #endif struct termios term_orig, term_vi; // remember what the cooked mode was #if ENABLE_FEATURE_VI_COLON char *initial_cmds[3]; // currently 2 entries, NULL terminated #endif // Should be just enough to hold a key sequence, // but CRASHME mode uses it as generated command buffer too #if ENABLE_FEATURE_VI_CRASHME char readbuffer[128]; #else char readbuffer[KEYCODE_BUFFER_SIZE]; #endif #define STATUS_BUFFER_LEN 200 char status_buffer[STATUS_BUFFER_LEN]; // messages to the user #if ENABLE_FEATURE_VI_DOT_CMD char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "." #endif char get_input_line__buf[MAX_INPUT_LEN]; /* former static */ char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2]; }; #define G (*ptr_to_globals) #define text (G.text ) #define text_size (G.text_size ) #define end (G.end ) #define dot (G.dot ) #define reg (G.reg ) #define vi_setops (G.vi_setops ) #define editing (G.editing ) #define cmd_mode (G.cmd_mode ) #define file_modified (G.file_modified ) #define last_file_modified (G.last_file_modified ) #define fn_start (G.fn_start ) #define save_argc (G.save_argc ) #define cmdcnt (G.cmdcnt ) #define rows (G.rows ) #define columns (G.columns ) #define crow (G.crow ) #define ccol (G.ccol ) #define offset (G.offset ) #define status_buffer (G.status_buffer ) #define have_status_msg (G.have_status_msg ) #define last_status_cksum (G.last_status_cksum ) #define current_filename (G.current_filename ) #define screen (G.screen ) #define screensize (G.screensize ) #define screenbegin (G.screenbegin ) #define tabstop (G.tabstop ) #define last_forward_char (G.last_forward_char ) #define erase_char (G.erase_char ) #define last_input_char (G.last_input_char ) #define chars_to_parse (G.chars_to_parse ) #if ENABLE_FEATURE_VI_READONLY #define readonly_mode (G.readonly_mode ) #else #define readonly_mode 0 #endif #define adding2q (G.adding2q ) #define lmc_len (G.lmc_len ) #define ioq (G.ioq ) #define ioq_start (G.ioq_start ) #define last_row (G.last_row ) #define my_pid (G.my_pid ) #define last_search_pattern (G.last_search_pattern) #define edit_file__cur_line (G.edit_file__cur_line) #define refresh__old_offset (G.refresh__old_offset) #define format_edit_status__tot (G.format_edit_status__tot) #define YDreg (G.YDreg ) #define Ureg (G.Ureg ) #define mark (G.mark ) #define context_start (G.context_start ) #define context_end (G.context_end ) #define restart (G.restart ) #define term_orig (G.term_orig ) #define term_vi (G.term_vi ) #define initial_cmds (G.initial_cmds ) #define readbuffer (G.readbuffer ) #define scr_out_buf (G.scr_out_buf ) #define last_modifying_cmd (G.last_modifying_cmd ) #define get_input_line__buf (G.get_input_line__buf) #define INIT_G() do { \ SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ last_file_modified = -1; \ /* "" but has space for 2 chars: */ \ USE_FEATURE_VI_SEARCH(last_search_pattern = xzalloc(2);) \ } while (0) static int init_text_buffer(char *); // init from file or create new static void edit_file(char *); // edit one file static void do_cmd(int); // execute a command static int next_tabstop(int); 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 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 *char_insert(char *, char); // insert the char c at 'p' static char *stupid_insert(char *, char); // stupidly insert the char c at 'p' static int 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 // sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready) static int mysleep(int); static int readit(void); // read (maybe cursor) key from stdin static int get_one_char(void); // read 1 char from stdin static int file_size(const char *); // what is the byte size of "fn" #if ENABLE_FEATURE_VI_READONLY static int file_insert(const char *, char *, int); #else static int file_insert(const char *, char *); #endif static int file_write(char *, char *, char *); #if !ENABLE_FEATURE_VI_OPTIMIZE_CURSOR #define place_cursor(a, b, optimize) place_cursor(a, b) #endif 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 go_bottom_and_clear_to_eol(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 status_line(const char *, ...); // print to status buf static void status_line_bold(const char *, ...); static void not_implemented(const char *); // display "Not implemented" message static int format_edit_status(void); // format file status on status line static void redraw(int); // force a full screen refresh static char* format_line(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 void write1(const char *out) { fputs(out, stdout); } int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int vi_main(int argc, char **argv) { int c; INIT_G(); #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME my_pid = getpid(); #endif #if ENABLE_FEATURE_VI_CRASHME srand((long) my_pid); #endif #ifdef NO_SUCH_APPLET_YET /* If we aren't "vi", we are "view" */ if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) { SET_READONLY_MODE(readonly_mode); } #endif vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE; // 1- process $HOME/.exrc file (not inplemented yet) // 2- process EXINIT variable from environment // 3- process command line args #if ENABLE_FEATURE_VI_COLON { char *p = getenv("EXINIT"); if (p && *p) initial_cmds[0] = xstrndup(p, MAX_INPUT_LEN); } #endif while ((c = getopt(argc, argv, "hCRH" USE_FEATURE_VI_COLON("c:"))) != -1) { switch (c) { #if ENABLE_FEATURE_VI_CRASHME case 'C': crashme = 1; break; #endif #if ENABLE_FEATURE_VI_READONLY case 'R': // Read-only flag SET_READONLY_MODE(readonly_mode); break; #endif #if ENABLE_FEATURE_VI_COLON case 'c': // cmd line vi command if (*optarg) initial_cmds[initial_cmds[0] != 0] = xstrndup(optarg, MAX_INPUT_LEN); break; #endif case 'H': show_help(); /* fall through */ default: bb_show_usage(); 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) { edit_file(0); } else { for (; optind < argc; optind++) { edit_file(argv[optind]); } } //----------------------------------------------------------- return 0; } /* read text from file or create an empty buf */ /* will also update current_filename */ static int init_text_buffer(char *fn) { int rc; int size = file_size(fn); // file size. -1 means does not exist. /* allocate/reallocate text buffer */ free(text); text_size = size + 10240; screenbegin = dot = end = text = xzalloc(text_size); if (fn != current_filename) { free(current_filename); current_filename = xstrdup(fn); } if (size < 0) { // file dont exist. Start empty buf with dummy line char_insert(text, '\n'); rc = 0; } else { rc = file_insert(fn, text USE_FEATURE_VI_READONLY(, 1)); } file_modified = 0; last_file_modified = -1; #if ENABLE_FEATURE_VI_YANKMARK /* init the marks. */ memset(mark, 0, sizeof(mark)); #endif return rc; } static void edit_file(char *fn) { #if ENABLE_FEATURE_VI_YANKMARK #define cur_line edit_file__cur_line #endif int c; int size; #if ENABLE_FEATURE_VI_USE_SIGNALS int sig; #endif editing = 1; // 0 = exit, 1 = one file, 2 = multiple files rawmode(); rows = 24; columns = 80; size = 0; if (ENABLE_FEATURE_VI_WIN_RESIZE) { get_terminal_width_height(0, &columns, &rows); if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS; if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS; } new_screen(rows, columns); // get memory for virtual screen init_text_buffer(fn); #if ENABLE_FEATURE_VI_YANKMARK YDreg = 26; // default Yank/Delete reg Ureg = 27; // hold orig line for "U" cmd 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 = sigsetjmp(restart, 1); if (sig != 0) { screenbegin = dot = text; } #endif 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(ioq_start); ioq = ioq_start = NULL; lmc_len = 0; adding2q = 0; #endif #if ENABLE_FEATURE_VI_COLON { 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++; } } #endif redraw(FALSE); // dont force every col re-draw //------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 == NULL && cmd_mode == 0 // command mode && c > '\0' // exclude NUL and non-ASCII chars && c < 0x7f // (Unicode and such) && 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 (!chars_to_parse && 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 } //------------------------------------------------------------------- go_bottom_and_clear_to_eol(); cookmode(); #undef cur_line } //----- 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; USE_FEATURE_VI_YANKMARK(char c;) USE_FEATURE_VI_SEARCH(char *pat;) *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 = strchrnul(++p, '/'); pat = xstrndup(p, q - p); // save copy of pattern p = q; 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 { // 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 (isblank(*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 (isblank(*p)) p++; if (*p == ',') { // is there a address separator p++; while (isblank(*p)) p++; // get SECOND addr, if present p = get_one_address(p, e); } ga0: while (isblank(*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 // buf must be no longer than MAX_INPUT_LEN! static void colon(char *buf) { char c, *orig_buf, *buf1, *q, *r; char *fn, cmd[MAX_INPUT_LEN], args[MAX_INPUT_LEN]; int i, l, li, ch, b, e; int useforce, forced = FALSE; // :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 = current_filename; // 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++; } *buf1 = '\0'; // get any ARGuments while (isblank(*buf)) buf++; strcpy(args, buf); useforce = FALSE; 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 int retcode; // :!ls run the go_bottom_and_clear_to_eol(); cookmode(); retcode = system(orig_buf + 1); // run the cmd if (retcode) printf("\nshell returned %i\n\n", retcode); rawmode(); Hit_Return(); // let user see results } #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); } status_line("%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 // don't edit, if the current file has been modified if (file_modified && !useforce) { status_line_bold("No write since last change (:edit! overrides)"); goto vc1; } if (args[0]) { // the user supplied a file name fn = args; } else if (current_filename && current_filename[0]) { // no user supplied name- use the current filename // fn = current_filename; was set by default } else { // no user file name, no current name- punt status_line_bold("No current filename"); goto vc1; } if (init_text_buffer(fn) < 0) goto vc1; #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; } #endif // how many lines in text[]? li = count_lines(text, end - 1); status_line("\"%s\"%s" USE_FEATURE_VI_READONLY("%s") " %dL, %dC", current_filename, (file_size(fn) < 0 ? " [New file]" : ""), USE_FEATURE_VI_READONLY( ((readonly_mode) ? " [Readonly]" : ""), ) li, ch); } else if (strncasecmp(cmd, "file", i) == 0) { // what File is this if (b != -1 || e != -1) { not_implemented("No address allowed on this command"); goto vc1; } if (args[0]) { // user wants a new filename free(current_filename); current_filename = 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 go_bottom_and_clear_to_eol(); 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); } go_bottom_and_clear_to_eol(); 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) { bb_putchar('^'); if (c == 127) c = '?'; else c += '@'; } bb_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) { status_line_bold("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) { status_line_bold("%d more file to edit", (save_argc - optind - 1)); goto vc1; } if (*cmd == 'n' && optind >= save_argc - 1) { status_line_bold("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]) { status_line_bold("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); ch = file_insert(fn, q USE_FEATURE_VI_READONLY(, 0)); if (ch < 0) goto vc1; // nothing was inserted // how many lines in text[]? li = count_lines(q, q + ch - 1); status_line("\"%s\"" USE_FEATURE_VI_READONLY("%s") " %dL, %dC", fn, USE_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),) 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) { status_line_bold("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 #if ENABLE_FEATURE_VI_SETOPTS char *argp; #endif 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 go_bottom_and_clear_to_eol(); 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 <= MAX_TABSTOP) 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 status_line(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 (readonly_mode && !useforce) { status_line_bold("\"%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) status_line_bold("\"%s\" %s", fn, strerror(errno)); } else { status_line("\"%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); status_line("Yank %d lines (%d chars) into [%c]", li, strlen(reg[YDreg]), what_reg()); #endif } else { // cmd unknown not_implemented(cmd); } vc1: dot = bound_dot(dot); // make sure "dot" is valid return; #if ENABLE_FEATURE_VI_SEARCH colon_s_fail: status_line(":s expression missing delimiters"); #endif } #endif /* FEATURE_VI_COLON */ static void Hit_Return(void) { int c; standout_start(); write1("[Hit return to continue]"); standout_end(); while ((c = get_one_char()) != '\n' && c != '\r') continue; redraw(TRUE); // force redraw all } static int next_tabstop(int col) { return col + ((tabstop - 1) - (col % tabstop)); } //----- 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 *tp; int cnt, ro, co; beg_cur = begin_line(d); // first char of cur line 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 { char *end_scr; // begin and end of screen end_scr = end_screen(); // last char of screen 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; while (tp < d) { // drive "co" to correct column if (*tp == '\n') //vda || *tp == '\0') break; if (*tp == '\t') { // handle tabs like real vi if (d == tp && cmd_mode) { break; } co = next_tabstop(co); } else if ((unsigned char)*tp < ' ' || *tp == 0x7f) { co++; // display as ^X, use 2 columns } co++; tp++; } // "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 { if (p > text) { p = memrchr(text, '\n', p - text); if (!p) return text; return p + 1; } return p; } static char *end_line(char *p) // return pointer to NL of cur line { if (p < end - 1) { p = memchr(p, '\n', end - p - 1); if (!p) return end - 1; } return p; } static char *dollar_line(char *p) // return pointer to just before NL line { p = end_line(p); // 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 > text && p[-1] == '\n') 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 < end - 1 && *p == '\n') 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; } // count line from start to stop static int count_lines(char *start, char *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); while (start <= stop && start <= end - 1) { start = end_line(start); if (*start == '\n') cnt++; start++; } 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; while (co < l && p < end) { if (*p == '\n') //vda || *p == '\0') break; if (*p == '\t') { co = next_tabstop(co); } else if (*p < ' ' || *p == 127) { co++; // display as ^X, use 2 columns } co++; p++; } 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; } #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 && ignorecase) { i = strncasecmp(s1, s2, len); } 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 status_line_bold("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++; } 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 (; isblank(*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); *p = c; //file_modified++; - done by text_hole_make() return p + 1; } static int find_range(char **start, char **stop, char c) { char *save_dot, *p, *q, *t; int cnt, multiline = 0; 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("^%$0bBeEfth\b\177", 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 { // nothing -- this causes any other values of c to // represent the one-character range under the // cursor. this is correct for ' ' and 'l', but // perhaps no others. // } if (q < p) { t = q; q = p; p = t; } // backward char movements don't include start position if (q > p && strchr("^0bBh\b\177", c)) q--; multiline = 0; for (t = p; t <= q; t++) { if (*t == '\n') { multiline = 1; break; } } *start = p; *stop = q; dot = save_dot; return multiline; } 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, const 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 { if (size <= 0) return p; end += size; // adjust the new END if (end >= (text + text_size)) { char *new_text; text_size += end - (text + text_size) + 10240; new_text = xrealloc(text, text_size); screenbegin = new_text + (screenbegin - text); dot = new_text + (dot - text); end = new_text + (end - text); p = new_text + (p - text); text = new_text; } memmove(p + size, p, end - size - p); memset(p, ' ', size); // clear new hole file_modified++; return p; } // close a hole in text[] static char *text_hole_delete(char *p, char *q) // delete "p" through "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 memmove(dest, src, cnt); 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++; 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 ); } #if ENABLE_FEATURE_VI_DOT_CMD static void start_new_cmd_q(char c) { // get buffer for new cmd // if there is a current cmd count put it in the buffer first if (cmdcnt > 0) { lmc_len = sprintf(last_modifying_cmd, "%d%c", cmdcnt, c); } else { // just save char c onto queue last_modifying_cmd[0] = c; lmc_len = 1; } 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); text_hole_make(p, i); strncpy(p, s, i); for (cnt = 0; *s != '\0'; s++) { if (*s == '\n') cnt++; } #if ENABLE_FEATURE_VI_YANKMARK status_line("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 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 */ //----- 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_stdin_TCSANOW(&term_vi); } static void cookmode(void) { fflush(stdout); tcsetattr_stdin_TCSANOW(&term_orig); } //----- Come here when we get a window resize signal --------- #if ENABLE_FEATURE_VI_USE_SIGNALS static void winch_sig(int sig UNUSED_PARAM) { // FIXME: do it in main loop!!! signal(SIGWINCH, winch_sig); if (ENABLE_FEATURE_VI_WIN_RESIZE) { get_terminal_width_height(0, &columns, &rows); if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS; if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS; } 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 UNUSED_PARAM) { 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); // huh? why? we are already "continued"... } //----- Come here when we get a Suspend signal ------------------- static void suspend_sig(int sig UNUSED_PARAM) { go_bottom_and_clear_to_eol(); 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) siglongjmp(restart, sig); } #endif /* FEATURE_VI_USE_SIGNALS */ static int mysleep(int hund) // sleep for 'h' 1/100 seconds { struct pollfd pfd[1]; pfd[0].fd = 0; pfd[0].events = POLLIN; return safe_poll(pfd, 1, hund*10) > 0; } //----- IO Routines -------------------------------------------- static int readit(void) // read (maybe cursor) key from stdin { int c; fflush(stdout); c = read_key(STDIN_FILENO, &chars_to_parse, readbuffer); if (c == -1) { // EOF/error go_bottom_and_clear_to_eol(); cookmode(); // terminal to "cooked" bb_error_msg_and_die("can't read user input"); } return c; } //----- IO Routines -------------------------------------------- static int get_one_char(void) { int c; #if ENABLE_FEATURE_VI_DOT_CMD 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 // careful with correct sign expansion! c = (unsigned char)*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 (lmc_len >= MAX_INPUT_LEN - 1) { status_line_bold("last_modifying_cmd overrun"); } else { // add new char to q last_modifying_cmd[lmc_len++] = c; } } #else c = readit(); // get the users input #endif /* FEATURE_VI_DOT_CMD */ return c; } // Get input line (uses "status line" area) static char *get_input_line(const char *prompt) { // char [MAX_INPUT_LEN] #define buf get_input_line__buf int c; int i; strcpy(buf, prompt); last_status_cksum = 0; // force status update go_bottom_and_clear_to_eol(); write1(prompt); // write out the :, /, or ? prompt i = strlen(buf); while (i < MAX_INPUT_LEN) { c = get_one_char(); if (c == '\n' || c == '\r' || c == 27) break; // this is end of input if (c == erase_char || c == 8 || c == 127) { // user wants to erase prev char buf[--i] = '\0'; write1("\b \b"); // erase char on screen if (i <= 0) // user backs up before b-o-l, exit break; } else if (c > 0 && c < 256) { // exclude Unicode // (TODO: need to handle Unicode) buf[i] = c; buf[++i] = '\0'; bb_putchar(c); } } refresh(FALSE); return buf; #undef buf } static int file_size(const char *fn) // what is the byte size of "fn" { struct stat st_buf; int cnt; cnt = -1; if (fn && fn[0] && stat(fn, &st_buf) == 0) // see if file exists cnt = (int) st_buf.st_size; return cnt; } static int file_insert(const char *fn, char *p USE_FEATURE_VI_READONLY(, int update_ro_status)) { int cnt = -1; int fd, size; struct stat statbuf; /* Validate file */ if (stat(fn, &statbuf) < 0) { status_line_bold("\"%s\" %s", fn, strerror(errno)); goto fi0; } if (!S_ISREG(statbuf.st_mode)) { // This is not a regular file status_line_bold("\"%s\" Not a regular file", fn); goto fi0; } if (p < text || p > end) { status_line_bold("Trying to insert file outside of memory"); goto fi0; } // read file to buffer fd = open(fn, O_RDONLY); if (fd < 0) { status_line_bold("\"%s\" %s", fn, strerror(errno)); goto fi0; } size = statbuf.st_size; p = text_hole_make(p, size); cnt = safe_read(fd, p, size); if (cnt < 0) { status_line_bold("\"%s\" %s", fn, strerror(errno)); p = text_hole_delete(p, p + size - 1); // un-do buffer insert } 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 status_line_bold("cannot read all of file \"%s\"", fn); } if (cnt >= size) file_modified++; close(fd); fi0: #if ENABLE_FEATURE_VI_READONLY if (update_ro_status && ((access(fn, W_OK) < 0) || /* root will always have access() * so we check fileperms too */ !(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH)) ) ) { SET_READONLY_FILE(readonly_mode); } #endif return cnt; } static int file_write(char *fn, char *first, char *last) { int fd, cnt, charcnt; if (fn == 0) { status_line_bold("No current filename"); return -2; } charcnt = 0; /* By popular request we do not open file with O_TRUNC, * but instead ftruncate() it _after_ successful write. * Might reduce amount of data lost on power fail etc. */ fd = open(fn, (O_WRONLY | O_CREAT), 0666); if (fd < 0) return -1; cnt = last - first + 1; charcnt = full_write(fd, first, cnt); ftruncate(fd, charcnt); if (charcnt == cnt) { // good write //file_modified = FALSE; } 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 optimize) { char cm1[sizeof(CMrc) + sizeof(int)*3 * 2]; #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR enum { SZ_UP = sizeof(CMup), SZ_DN = sizeof(CMdown), SEQ_SIZE = SZ_UP > SZ_DN ? SZ_UP : SZ_DN, }; char cm2[SEQ_SIZE * 5 + 32]; // bigger than worst case size #endif char *cm; 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 ENABLE_FEATURE_VI_OPTIMIZE_CURSOR if (optimize && col < 16) { char *screenp; int Rrow = last_row; int diff = Rrow - row; if (diff < -5 || diff > 5) goto skip; //----- find the minimum # of chars to move cursor ------------- //----- 2. Try moving with discreet chars (Newline, [back]space, ...) cm2[0] = '\0'; // 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); // pick the shortest cursor motion to send out if (strlen(cm2) < strlen(cm)) { cm = cm2; } skip: ; } last_row = row; #endif /* FEATURE_VI_OPTIMIZE_CURSOR */ write1(cm); } //----- Erase from cursor to end of line ----------------------- static void clear_to_eol(void) { write1(Ceol); // Erase from cursor to end of line } static void go_bottom_and_clear_to_eol(void) { place_cursor(rows - 1, 0, FALSE); // go to bottom of screen clear_to_eol(); // erase 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 go_bottom_and_clear_to_eol(); write1(status_buffer); 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 status_line_bold(const char *format, ...) { va_list args; va_start(args, format); strcpy(status_buffer, SOs); // Terminal standout mode on vsprintf(status_buffer + sizeof(SOs)-1, 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 status_line(const char *format, ...) { va_list args; va_start(args, format); vsprintf(status_buffer, format, args); va_end(args); have_status_msg = 1; } // copy s to buf, convert unprintable static void print_literal(char *buf, const char *s) { 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 (strlen(buf) > MAX_INPUT_LEN - 10) // paranoia break; } } static void not_implemented(const char *s) { char buf[MAX_INPUT_LEN]; print_literal(buf, s); status_line_bold("\'%s\' is not implemented", buf); } // show file status on status line static int format_edit_status(void) { static const char cmd_mode_indicator[] ALIGN1 = "-IR-"; #define tot format_edit_status__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_indicator[cmd_mode & 3], (current_filename != NULL ? current_filename : "No file"), #if ENABLE_FEATURE_VI_READONLY (readonly_mode ? " [Readonly]" : ""), #endif (file_modified ? " [Modified]" : ""), cur, tot, percent); if (ret >= 0 && ret < trunc_at) return ret; /* it all fit */ return trunc_at; /* had to truncate */ #undef tot } //----- Force refresh of all Lines ----------------------------- static void redraw(int full_screen) { place_cursor(0, 0, FALSE); // put cursor in correct place clear_to_eos(); // tell 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 char* format_line(char *src /*, int li*/) { unsigned char c; int co; int ofs = offset; char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2] c = '~'; // char in col 0 in non-existent lines is '~' co = 0; while (co < columns + tabstop) { // have we gone past the end? if (src < end) { c = *src++; if (c == '\n') break; if ((c & 0x80) && !Isprint(c)) { c = '.'; } if (c < ' ' || c == 0x7f) { if (c == '\t') { c = ' '; // co % 8 != 7 while ((co % tabstop) != (tabstop - 1)) { dest[co++] = c; } } else { dest[co++] = '^'; if (c == 0x7f) c = '?'; else c += '@'; // Ctrl-X -> 'X' } } } dest[co++] = c; // discard scrolled-off-to-the-left portion, // in tabstop-sized pieces if (ofs >= tabstop && co >= tabstop) { memmove(dest, dest + tabstop, co); co -= tabstop; ofs -= tabstop; } if (src >= end) break; } // check "short line, gigantic offset" case if (co < ofs) ofs = co; // discard last scrolled off part co -= ofs; dest += ofs; // fill the rest with spaces if (co < columns) memset(&dest[co], ' ', columns - co); return dest; } //----- 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) { #define old_offset refresh__old_offset int li, changed; char *tp, *sp; // pointer into text[] and screen[] if (ENABLE_FEATURE_VI_WIN_RESIZE) { unsigned c = columns, r = rows; get_terminal_width_height(0, &columns, &rows); if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS; if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS; full_screen |= (c - columns) | (r - 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 char *out_buf; // format current text line out_buf = format_line(tp /*, li*/); // skip to the end of the current text[] line if (tp < end) { char *t = memchr(tp, '\n', end - tp); if (!t) t = end - 1; tp = t + 1; } // see if there are any changes between vitual screen and out_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 (out_buf[cs] != sp[cs]) { changed = TRUE; // mark for redraw break; } } // look backward for last difference between out_buf and screen for (; ce >= cs; ce--) { if (out_buf[ce] != 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 out_buf if (changed) { // copy changed part of buffer to virtual screen memcpy(sp+cs, out_buf+cs, ce-cs+1); // move cursor to column of first change //if (offset != old_offset) { // // place_cursor is still too stupid // // to handle offsets correctly // place_cursor(li, cs, FALSE); //} else { place_cursor(li, cs, TRUE); //} // write line out to terminal fwrite(&sp[cs], ce - cs + 1, 1, stdout); } } place_cursor(crow, ccol, TRUE); old_offset = offset; #undef old_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(int c) { const char *msg = msg; // for compiler char *p, *q, *save_dot; char buf[12]; int dir; int cnt, i, j; int c1; // c1 = c; // quiet the compiler // cnt = yf = 0; // quiet the compiler // msg = p = q = save_dot = buf; // quiet the compiler memset(buf, '\0', 12); show_status_line(); /* if this is a cursor key, skip these checks */ switch (c) { case KEYCODE_UP: case KEYCODE_DOWN: case KEYCODE_LEFT: case KEYCODE_RIGHT: case KEYCODE_HOME: case KEYCODE_END: case KEYCODE_PAGEUP: case KEYCODE_PAGEDOWN: case KEYCODE_DELETE: goto key_cmd_mode; } if (cmd_mode == 2) { // flip-flop Insert/Replace mode if (c == KEYCODE_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 == KEYCODE_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 'F': // F- //case 'K': // K- //case 'Q': // Q- //case 'S': // S- //case 'T': // T- //case 'V': // V- //case '[': // [- //case '\\': // \- //case ']': // ]- //case '_': // _- //case '`': // `- //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'; } not_implemented(buf); end_cmd_q(); // stop adding to q case 0x00: // nul- ignore break; case 2: // ctrl-B scroll up full screen case KEYCODE_PAGEUP: // Cursor Key Page Up dot_scroll(rows - 2, -1); break; 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 KEYCODE_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 KEYCODE_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 KEYCODE_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 KEYCODE_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() | 0x20) - 'a'; // | 0x20 is tolower() if ((unsigned)c1 <= 25) { // a-z? YDreg = c1; } else { indicate_error(c); } break; case '\'': // '- goto a specific mark c1 = (get_one_char() | 0x20) - 'a'; if ((unsigned)c1 <= 25) { // a-z? // get the b-o-l q = mark[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() | 0x20) - 'a'; if ((unsigned)c1 <= 25) { // a-z? // remember the line mark[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) { status_line_bold("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 KEYCODE_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 through 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 ',': // repeat latest 'f' in opposite direction if (cmdcnt-- > 1) { do_cmd(','); } // repeat cnt if (last_forward_char == 0) break; q = dot - 1; while (q >= text && *q != '\n' && *q != last_forward_char) { q--; } if (q >= text && *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 (lmc_len > 0) { last_modifying_cmd[lmc_len] = 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]) { if (last_search_pattern[0]) last_search_pattern[0] = c; 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: 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) status_line_bold("%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] != '!') { status_line_bold("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(current_filename, text, end - 1); if (cnt < 0) { if (cnt == -1) status_line_bold("Write error: %s", strerror(errno)); } else { file_modified = 0; last_file_modified = -1; status_line("\"%s\" %dL, %dC", current_filename, 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 not_implemented(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 through 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': // 'gg' goto a line number (vim) (default: very first line) c1 = get_one_char(); if (c1 != 'g') { buf[0] = 'g'; buf[1] = c1; // TODO: if Unicode? buf[2] = '\0'; not_implemented(buf); break; } if (cmdcnt == 0) cmdcnt = 1; /* fall through */ 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 through to ... 'i' case 'i': // i- insert before current char case KEYCODE_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 (isblank(*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 KEYCODE_DELETE: c = 'x'; // fall through 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 && readonly_mode) { status_line_bold("\"%s\" File is read only", current_filename); break; } cnt = file_write(current_filename, text, end - 1); if (cnt < 0) { if (cnt == -1) status_line_bold("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 { int yf, ml, whole = 0; 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 // determine range, and whether it spans lines ml = 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 (isblank(*q)) { if (q <= text || q[-1] == '\n') break; q--; } } dot = yank_delete(p, q, ml, yf); // delete word } else if (strchr("^0bBeEft%$ lh\b\177", c1)) { // partial line copy text into a register and delete dot = yank_delete(p, q, ml, yf); // delete word } else if (strchr("cdykjHL+-{}\r\n", c1)) { // whole line copy text into a register and delete dot = yank_delete(p, q, ml, yf); // delete lines whole = 1; } else { // could not recognize object c = c1 = 27; // error- ml = 0; indicate_error(c); } if (ml && whole) { if (c == 'c') { dot = char_insert(dot, '\n'); // on the last line of file don't move to prev line if (whole && dot != (end-1)) { dot_prev(); } } else if (c == 'd') { dot_begin(); dot_skip_over_ws(); } } 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++; } status_line("%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 KEYCODE_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++; } 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++; } else if (isupper(*dot)) { *dot = tolower(*dot); file_modified++; } dot_right(); end_cmd_q(); // stop adding to q break; //----- The Cursor and Function Keys ----------------------------- case KEYCODE_HOME: // Cursor Key Home dot_begin(); break; // The Fn keys could point to do_macro which could translate them #if 0 case KEYCODE_FUN1: // Function Key F1 case KEYCODE_FUN2: // Function Key F2 case KEYCODE_FUN3: // Function Key F3 case KEYCODE_FUN4: // Function Key F4 case KEYCODE_FUN5: // Function Key F5 case KEYCODE_FUN6: // Function Key F6 case KEYCODE_FUN7: // Function Key F7 case KEYCODE_FUN8: // Function Key F8 case KEYCODE_FUN9: // Function Key F9 case KEYCODE_FUN10: // Function Key F10 case KEYCODE_FUN11: // Function Key F11 case KEYCODE_FUN12: // Function Key F12 break; #endif } 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--; } /* NB! the CRASHME code is unmaintained, and doesn't currently build */ #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; static const char chars[20] = "\t012345 abcdABCD-=.$"; static 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" }; static 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", }; static 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 (chars_to_parse > 0) goto cd1; cd0: startrbi = rbi = 0; sleeptime = 0; // how long to pause between commands memset(readbuffer, '\0', sizeof(readbuffer)); // 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"); } chars_to_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[80]; 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]) { 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 (safe_read(STDIN_FILENO, d, 1) > 0) { if (d[0] == '\n' || d[0] == '\r') break; } } tim = time(NULL); 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