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Diffstat (limited to 'editors/vi.c')
| -rw-r--r-- | editors/vi.c | 3954 |
1 files changed, 3954 insertions, 0 deletions
diff --git a/editors/vi.c b/editors/vi.c new file mode 100644 index 0000000..92c069d --- /dev/null +++ b/editors/vi.c @@ -0,0 +1,3954 @@ +/* vi: set sw=4 ts=4: */ +/* + * tiny vi.c: A small 'vi' clone + * Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com> + * + * 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" + // :!<cmd> // run <cmd> 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 <cmd> + 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<text "); + } + if (end > textend) { + strcat(msg, "end>textend "); + } + if (dot < text) { + strcat(msg, "dot<text "); + } + if (dot > end) { + strcat(msg, "dot>end "); + } + if (screenbegin < text) { + strcat(msg, "screenbegin<text "); + } + if (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 |