diff options
Diffstat (limited to 'editors')
| -rw-r--r-- | editors/vi.c | 2915 |
1 files changed, 1407 insertions, 1508 deletions
diff --git a/editors/vi.c b/editors/vi.c index 9db763ccd..a0a2b7a82 100644 --- a/editors/vi.c +++ b/editors/vi.c @@ -483,123 +483,8 @@ struct globals { } while (0) -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 beginning 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 char *bound_dot(char *); // make sure text[0] <= P < "end" -static char *new_screen(int, int); // malloc virtual screen memory -#if !ENABLE_FEATURE_VI_UNDO -#define char_insert(a,b,c) char_insert(a,b) -#endif -static char *char_insert(char *, char, int); // insert the char c at 'p' -// might reallocate text[]! use p += stupid_insert(p, ...), -// and be careful to not use pointers into potentially freed text[]! -static uintptr_t stupid_insert(char *, char); // stupidly insert the char c at 'p' -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 () [] {} -#if !ENABLE_FEATURE_VI_UNDO -#define text_hole_delete(a,b,c) text_hole_delete(a,b) -#endif -static char *text_hole_delete(char *, char *, int); // at "p", delete a 'size' byte hole -// might reallocate text[]! use p += text_hole_make(p, ...), -// and be careful to not use pointers into potentially freed text[]! -static uintptr_t text_hole_make(char *, int); // at "p", make a 'size' byte hole -#if !ENABLE_FEATURE_VI_UNDO -#define yank_delete(a,b,c,d,e) yank_delete(a,b,c,d) -#endif -static char *yank_delete(char *, char *, int, int, int); // yank text[] into register then delete -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 get_one_char(void); // read 1 char from stdin -// file_insert might reallocate text[]! -static int file_insert(const char *, char *, int); -static int file_write(char *, char *, char *); -static void screen_erase(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 status_line_bold_errno(const char *fn); -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 -static void Hit_Return(void); - -#if ENABLE_FEATURE_VI_SEARCH -static char *char_search(char *, const char *, int); // search for pattern starting at p -#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 -#endif -static void colon(char *); // execute the "colon" mode cmds -#if ENABLE_FEATURE_VI_USE_SIGNALS -static void winch_handler(int); // catch window size changes -static void tstp_handler(int); // catch ctrl-Z -static void int_handler(int); // catch ctrl-C -#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 -// might reallocate text[]! use p += string_insert(p, ...), -// and be careful to not use pointers into potentially freed text[]! -# if !ENABLE_FEATURE_VI_UNDO -#define string_insert(a,b,c) string_insert(a,b) -# endif -static uintptr_t string_insert(char *, const char *, int); // 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_UNDO -static void flush_undo_data(void); -static void undo_push(char *, unsigned, unsigned char); // push an operation on the undo stack -static void undo_push_insert(char *, int, int); // convenience function -static void undo_pop(void); // undo the last operation -# if ENABLE_FEATURE_VI_UNDO_QUEUE -static void undo_queue_commit(void); // flush any queued objects to the undo stack -# else -# define undo_queue_commit() ((void)0) -# endif -#else -#define flush_undo_data() ((void)0) -#define undo_queue_commit() ((void)0) -#endif #if ENABLE_FEATURE_VI_CRASHME static void crash_dummy(); @@ -645,37 +530,6 @@ static void write1(const char *out) fputs(out, stdout); } -/* read text from file or create an empty buf */ -/* will also update current_filename */ -static int init_text_buffer(char *fn) -{ - int rc; - - /* allocate/reallocate text buffer */ - free(text); - text_size = 10240; - screenbegin = dot = end = text = xzalloc(text_size); - - if (fn != current_filename) { - free(current_filename); - current_filename = xstrdup(fn); - } - rc = file_insert(fn, text, 1); - if (rc < 0) { - // file doesnt exist. Start empty buf with dummy line - char_insert(text, '\n', NO_UNDO); - } - - flush_undo_data(); - modified_count = 0; - last_modified_count = -1; -#if ENABLE_FEATURE_VI_YANKMARK - /* init the marks */ - memset(mark, 0, sizeof(mark)); -#endif - return rc; -} - #if ENABLE_FEATURE_VI_WIN_RESIZE static int query_screen_dimensions(void) { @@ -969,6 +823,1413 @@ static NOINLINE void sync_cursor(char *d, int *row, int *col) *col = co; } +//----- 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 IF_FEATURE_VI_ASK_TERMINAL(&& !G.get_rowcol_error) ) { + unsigned c = columns, r = rows; + query_screen_dimensions(); +#if ENABLE_FEATURE_VI_USE_SIGNALS + full_screen |= (c - columns) | (r - rows); +#else + if (c != columns || r != rows) { + full_screen = TRUE; + // update screen memory since SIGWINCH won't have done it + new_screen(rows, columns); + } +#endif + } + 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 virtual 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 virtual screen and out_buf + if (changed) { + // copy changed part of buffer to virtual screen + memcpy(sp+cs, out_buf+cs, ce-cs+1); + place_cursor(li, cs); + // write line out to terminal + fwrite(&sp[cs], ce - cs + 1, 1, stdout); + } + } + + place_cursor(crow, ccol); + + old_offset = offset; +#undef old_offset +} + +//----- Force refresh of all Lines ----------------------------- +static void redraw(int full_screen) +{ + // cursor to top,left; clear to the end of screen + write1(ESC_SET_CURSOR_TOPLEFT ESC_CLEAR2EOS); + 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(); +} + +//----- Flash the screen -------------------------------------- +static void flash(int h) +{ + standout_start(); + redraw(TRUE); + mysleep(h); + standout_end(); + redraw(TRUE); +} + +static void indicate_error(void) +{ +#if ENABLE_FEATURE_VI_CRASHME + if (crashme > 0) + return; +#endif + if (!err_method) { + write1(ESC_BELL); + } else { + flash(10); + } +} + +//----- IO Routines -------------------------------------------- +static int readit(void) // read (maybe cursor) key from stdin +{ + int c; + + fflush_all(); + + // Wait for input. TIMEOUT = -1 makes read_key wait even + // on nonblocking stdin. + // Note: read_key sets errno to 0 on success. + again: + c = read_key(STDIN_FILENO, readbuffer, /*timeout:*/ -1); + if (c == -1) { // EOF/error + if (errno == EAGAIN) // paranoia + goto again; + go_bottom_and_clear_to_eol(); + cookmode(); // terminal to "cooked" + bb_error_msg_and_die("can't read user input"); + } + return c; +} + +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 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 +} + +//----- Draw the status line at bottom of the screen ------------- +// 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; + + // modified_count 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); + + // count_lines() is expensive. + // Call it only if something was changed since last time + // we were here: + if (modified_count != last_modified_count) { + tot = cur + count_lines(dot, end - 1) - 1; + last_modified_count = modified_count; + } + + // 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 + (modified_count ? " [Modified]" : ""), + cur, tot, percent); + + if (ret >= 0 && ret < trunc_at) + return ret; // it all fit + + return trunc_at; // had to truncate +#undef tot +} + +static int bufsum(char *buf, int count) +{ + int sum = 0; + char *e = buf + count; + while (buf < e) + sum += (unsigned char) *buf++; + return sum; +} + +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); // put cursor back in correct place + } + fflush_all(); +} + +//----- 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, ESC_BOLD_TEXT); + vsprintf(status_buffer + sizeof(ESC_BOLD_TEXT)-1, format, args); + strcat(status_buffer, ESC_NORM_TEXT); + va_end(args); + + have_status_msg = 1 + sizeof(ESC_BOLD_TEXT) + sizeof(ESC_NORM_TEXT) - 2; +} + +static void status_line_bold_errno(const char *fn) +{ + status_line_bold("'%s' "STRERROR_FMT, fn STRERROR_ERRNO); +} + +// 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) +{ + char *d; + unsigned char c; + + buf[0] = '\0'; + if (!s[0]) + s = "(NULL)"; + + d = buf; + for (; *s; s++) { + int c_is_no_print; + + c = *s; + c_is_no_print = (c & 0x80) && !Isprint(c); + if (c_is_no_print) { + strcpy(d, ESC_NORM_TEXT); + d += sizeof(ESC_NORM_TEXT)-1; + c = '.'; + } + if (c < ' ' || c == 0x7f) { + *d++ = '^'; + c |= '@'; // 0x40 + if (c == 0x7f) + c = '?'; + } + *d++ = c; + *d = '\0'; + if (c_is_no_print) { + strcpy(d, ESC_BOLD_TEXT); + d += sizeof(ESC_BOLD_TEXT)-1; + } + if (*s == '\n') { + *d++ = '$'; + *d = '\0'; + } + if (d - 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); +} + +#if ENABLE_FEATURE_VI_YANKMARK +static char *text_yank(char *p, char *q, int dest) // copy text into a register +{ + int cnt = q - p; + if (cnt < 0) { // they are backwards- reverse them + p = q; + cnt = -cnt; + } + free(reg[dest]); // if already a yank register, free it + reg[dest] = xstrndup(p, cnt + 1); + 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] = p; + mark[26] = p = tmp; + context_start = prev_line(prev_line(prev_line(p))); + context_end = next_line(next_line(next_line(p))); + } + return p; +} +#endif /* FEATURE_VI_YANKMARK */ + +#if ENABLE_FEATURE_VI_UNDO +static void undo_push(char *, unsigned, unsigned char); +#endif + +// open a hole in text[] +// might reallocate text[]! use p += text_hole_make(p, ...), +// and be careful to not use pointers into potentially freed text[]! +static uintptr_t text_hole_make(char *p, int size) // at "p", make a 'size' byte hole +{ + uintptr_t bias = 0; + + if (size <= 0) + return bias; + 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); + bias = (new_text - text); + screenbegin += bias; + dot += bias; + end += bias; + p += bias; +#if ENABLE_FEATURE_VI_YANKMARK + { + int i; + for (i = 0; i < ARRAY_SIZE(mark); i++) + if (mark[i]) + mark[i] += bias; + } +#endif + text = new_text; + } + memmove(p + size, p, end - size - p); + memset(p, ' ', size); // clear new hole + return bias; +} + +// close a hole in text[] - delete "p" through "q", inclusive +// "undo" value indicates if this operation should be undo-able +#if !ENABLE_FEATURE_VI_UNDO +#define text_hole_delete(a,b,c) text_hole_delete(a,b) +#endif +static char *text_hole_delete(char *p, char *q, int undo) +{ + 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 ENABLE_FEATURE_VI_UNDO + switch (undo) { + case NO_UNDO: + break; + case ALLOW_UNDO: + undo_push(p, hole_size, UNDO_DEL); + break; + case ALLOW_UNDO_CHAIN: + undo_push(p, hole_size, UNDO_DEL_CHAIN); + break; +# if ENABLE_FEATURE_VI_UNDO_QUEUE + case ALLOW_UNDO_QUEUED: + undo_push(p, hole_size, UNDO_DEL_QUEUED); + break; +# endif + } + modified_count--; +#endif + if (src < text || src > end) + goto thd0; + if (dest < text || dest >= end) + goto thd0; + modified_count++; + 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 + thd0: + return dest; +} + +#if ENABLE_FEATURE_VI_UNDO + +# if ENABLE_FEATURE_VI_UNDO_QUEUE +// Flush any queued objects to the undo stack +static void undo_queue_commit(void) +{ + // Pushes the queue object onto the undo stack + if (undo_q > 0) { + // Deleted character undo events grow from the end + undo_push(undo_queue + CONFIG_FEATURE_VI_UNDO_QUEUE_MAX - undo_q, + undo_q, + (undo_queue_state | UNDO_USE_SPOS) + ); + undo_queue_state = UNDO_EMPTY; + undo_q = 0; + } +} +# else +# define undo_queue_commit() ((void)0) +# endif + +static void flush_undo_data(void) +{ + struct undo_object *undo_entry; + + while (undo_stack_tail) { + undo_entry = undo_stack_tail; + undo_stack_tail = undo_entry->prev; + free(undo_entry); + } +} + +// Undo functions and hooks added by Jody Bruchon (jody@jodybruchon.com) +// Add to the undo stack +static void undo_push(char *src, unsigned length, uint8_t u_type) +{ + struct undo_object *undo_entry; + + // "u_type" values + // UNDO_INS: insertion, undo will remove from buffer + // UNDO_DEL: deleted text, undo will restore to buffer + // UNDO_{INS,DEL}_CHAIN: Same as above but also calls undo_pop() when complete + // The CHAIN operations are for handling multiple operations that the user + // performs with a single action, i.e. REPLACE mode or find-and-replace commands + // UNDO_{INS,DEL}_QUEUED: If queuing feature is enabled, allow use of the queue + // for the INS/DEL operation. The raw values should be equal to the values of + // UNDO_{INS,DEL} ORed with UNDO_QUEUED_FLAG + +# if ENABLE_FEATURE_VI_UNDO_QUEUE + // This undo queuing functionality groups multiple character typing or backspaces + // into a single large undo object. This greatly reduces calls to malloc() for + // single-character operations while typing and has the side benefit of letting + // an undo operation remove chunks of text rather than a single character. + switch (u_type) { + case UNDO_EMPTY: // Just in case this ever happens... + return; + case UNDO_DEL_QUEUED: + if (length != 1) + return; // Only queue single characters + switch (undo_queue_state) { + case UNDO_EMPTY: + undo_queue_state = UNDO_DEL; + case UNDO_DEL: + undo_queue_spos = src; + undo_q++; + undo_queue[CONFIG_FEATURE_VI_UNDO_QUEUE_MAX - undo_q] = *src; + // If queue is full, dump it into an object + if (undo_q == CONFIG_FEATURE_VI_UNDO_QUEUE_MAX) + undo_queue_commit(); + return; + case UNDO_INS: + // Switch from storing inserted text to deleted text + undo_queue_commit(); + undo_push(src, length, UNDO_DEL_QUEUED); + return; + } + break; + case UNDO_INS_QUEUED: + if (length < 1) + return; + switch (undo_queue_state) { + case UNDO_EMPTY: + undo_queue_state = UNDO_INS; + undo_queue_spos = src; + case UNDO_INS: + while (length--) { + undo_q++; // Don't need to save any data for insertions + if (undo_q == CONFIG_FEATURE_VI_UNDO_QUEUE_MAX) + undo_queue_commit(); + } + return; + case UNDO_DEL: + // Switch from storing deleted text to inserted text + undo_queue_commit(); + undo_push(src, length, UNDO_INS_QUEUED); + return; + } + break; + } +# else + // If undo queuing is disabled, ignore the queuing flag entirely + u_type = u_type & ~UNDO_QUEUED_FLAG; +# endif + + // Allocate a new undo object + if (u_type == UNDO_DEL || u_type == UNDO_DEL_CHAIN) { + // For UNDO_DEL objects, save deleted text + if ((text + length) == end) + length--; + // If this deletion empties text[], strip the newline. When the buffer becomes + // zero-length, a newline is added back, which requires this to compensate. + undo_entry = xzalloc(offsetof(struct undo_object, undo_text) + length); + memcpy(undo_entry->undo_text, src, length); + } else { + undo_entry = xzalloc(sizeof(*undo_entry)); + } + undo_entry->length = length; +# if ENABLE_FEATURE_VI_UNDO_QUEUE + if ((u_type & UNDO_USE_SPOS) != 0) { + undo_entry->start = undo_queue_spos - text; // use start position from queue + } else { + undo_entry->start = src - text; // use offset from start of text buffer + } + u_type = (u_type & ~UNDO_USE_SPOS); +# else + undo_entry->start = src - text; +# endif + undo_entry->u_type = u_type; + + // Push it on undo stack + undo_entry->prev = undo_stack_tail; + undo_stack_tail = undo_entry; + modified_count++; +} + +static void undo_push_insert(char *p, int len, int undo) +{ + switch (undo) { + case ALLOW_UNDO: + undo_push(p, len, UNDO_INS); + break; + case ALLOW_UNDO_CHAIN: + undo_push(p, len, UNDO_INS_CHAIN); + break; +# if ENABLE_FEATURE_VI_UNDO_QUEUE + case ALLOW_UNDO_QUEUED: + undo_push(p, len, UNDO_INS_QUEUED); + break; +# endif + } +} + +// Undo the last operation +static void undo_pop(void) +{ + int repeat; + char *u_start, *u_end; + struct undo_object *undo_entry; + + // Commit pending undo queue before popping (should be unnecessary) + undo_queue_commit(); + + undo_entry = undo_stack_tail; + // Check for an empty undo stack + if (!undo_entry) { + status_line("Already at oldest change"); + return; + } + + switch (undo_entry->u_type) { + case UNDO_DEL: + case UNDO_DEL_CHAIN: + // make hole and put in text that was deleted; deallocate text + u_start = text + undo_entry->start; + text_hole_make(u_start, undo_entry->length); + memcpy(u_start, undo_entry->undo_text, undo_entry->length); + status_line("Undo [%d] %s %d chars at position %d", + modified_count, "restored", + undo_entry->length, undo_entry->start + ); + break; + case UNDO_INS: + case UNDO_INS_CHAIN: + // delete what was inserted + u_start = undo_entry->start + text; + u_end = u_start - 1 + undo_entry->length; + text_hole_delete(u_start, u_end, NO_UNDO); + status_line("Undo [%d] %s %d chars at position %d", + modified_count, "deleted", + undo_entry->length, undo_entry->start + ); + break; + } + repeat = 0; + switch (undo_entry->u_type) { + // If this is the end of a chain, lower modification count and refresh display + case UNDO_DEL: + case UNDO_INS: + dot = (text + undo_entry->start); + refresh(FALSE); + break; + case UNDO_DEL_CHAIN: + case UNDO_INS_CHAIN: + repeat = 1; + break; + } + // Deallocate the undo object we just processed + undo_stack_tail = undo_entry->prev; + free(undo_entry); + modified_count--; + // For chained operations, continue popping all the way down the chain. + if (repeat) { + undo_pop(); // Follow the undo chain if one exists + } +} + +#else +# define flush_undo_data() ((void)0) +# define undo_queue_commit() ((void)0) +#endif /* ENABLE_FEATURE_VI_UNDO */ + +//----- Dot Movement Routines ---------------------------------- +static void dot_left(void) +{ + undo_queue_commit(); + if (dot > text && dot[-1] != '\n') + dot--; +} + +static void dot_right(void) +{ + undo_queue_commit(); + if (dot < end - 1 && *dot != '\n') + dot++; +} + +static void dot_begin(void) +{ + undo_queue_commit(); + dot = begin_line(dot); // return pointer to first char cur line +} + +static void dot_end(void) +{ + undo_queue_commit(); + 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) +{ + undo_queue_commit(); + dot = next_line(dot); +} + +static void dot_prev(void) +{ + undo_queue_commit(); + dot = prev_line(dot); +} + +static void dot_skip_over_ws(void) +{ + // skip WS + while (isspace(*dot) && *dot != '\n' && dot < end - 1) + dot++; +} + +static void dot_scroll(int cnt, int dir) +{ + char *q; + + undo_queue_commit(); + 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 char *bound_dot(char *p) // make sure text[0] <= P < "end" +{ + if (p >= end && end > text) { + p = end - 1; + indicate_error(); + } + if (p < text) { + p = text; + indicate_error(); + } + return p; +} + +#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; +} +#else +# define end_cmd_q() ((void)0) +#endif /* FEATURE_VI_DOT_CMD */ + +// copy text into register, then delete text. +// if dist <= 0, do not include, or go past, a NewLine +// +#if !ENABLE_FEATURE_VI_UNDO +#define yank_delete(a,b,c,d,e) yank_delete(a,b,c,d) +#endif +static char *yank_delete(char *start, char *stop, int dist, int yf, int undo) +{ + 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, undo); + } // delete lines + return p; +} + +// might reallocate text[]! +static int file_insert(const char *fn, char *p, int initial) +{ + int cnt = -1; + int fd, size; + struct stat statbuf; + + if (p < text) + p = text; + if (p > end) + p = end; + + fd = open(fn, O_RDONLY); + if (fd < 0) { + if (!initial) + status_line_bold_errno(fn); + return cnt; + } + + // Validate file + if (fstat(fd, &statbuf) < 0) { + status_line_bold_errno(fn); + goto fi; + } + if (!S_ISREG(statbuf.st_mode)) { + status_line_bold("'%s' is not a regular file", fn); + goto fi; + } + size = (statbuf.st_size < INT_MAX ? (int)statbuf.st_size : INT_MAX); + p += text_hole_make(p, size); + cnt = full_read(fd, p, size); + if (cnt < 0) { + status_line_bold_errno(fn); + p = text_hole_delete(p, p + size - 1, NO_UNDO); // un-do buffer insert + } else if (cnt < size) { + // There was a partial read, shrink unused space + p = text_hole_delete(p + cnt, p + size - 1, NO_UNDO); + status_line_bold("can't read '%s'", fn); + } + fi: + close(fd); + +#if ENABLE_FEATURE_VI_READONLY + if (initial + && ((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; +} + +// find matching char of pair () [] {} +// will crash if c is not one of these +static char *find_pair(char *p, const char c) +{ + const char *braces = "()[]{}"; + char match; + int dir, level; + + dir = strchr(braces, c) - braces; + dir ^= 1; + match = braces[dir]; + dir = ((dir & 1) << 1) - 1; // 1 for ([{, -1 for )\} + + // look for match, count levels of pairs (( )) + level = 1; + for (;;) { + p += dir; + if (p < text || p >= end) + return NULL; + if (*p == c) + level++; // increase pair levels + if (*p == match) { + level--; // reduce pair level + if (level == 0) + return p; // found matching pair + } + } +} + +#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(); // 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 */ + +// might reallocate text[]! use p += stupid_insert(p, ...), +// and be careful to not use pointers into potentially freed text[]! +static uintptr_t stupid_insert(char *p, char c) // stupidly insert the char c at 'p' +{ + uintptr_t bias; + bias = text_hole_make(p, 1); + p += bias; + *p = c; + return bias; +} + +#if !ENABLE_FEATURE_VI_UNDO +#define char_insert(a,b,c) char_insert(a,b) +#endif +static char *char_insert(char *p, char c, int undo) // insert the char c at 'p' +{ + if (c == 22) { // Is this an ctrl-V? + p += stupid_insert(p, '^'); // use ^ to indicate literal next + refresh(FALSE); // show the ^ + c = get_one_char(); + *p = c; +#if ENABLE_FEATURE_VI_UNDO + undo_push_insert(p, 1, undo); +#else + modified_count++; +#endif /* ENABLE_FEATURE_VI_UNDO */ + p++; + } else if (c == 27) { // Is this an ESC? + cmd_mode = 0; + undo_queue_commit(); + 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 + if (p > text) { + p--; + p = text_hole_delete(p, p, ALLOW_UNDO_QUEUED); // shrink buffer 1 char + } + } else { + // insert a char into text[] + if (c == 13) + c = '\n'; // translate \r to \n +#if ENABLE_FEATURE_VI_UNDO +# if ENABLE_FEATURE_VI_UNDO_QUEUE + if (c == '\n') + undo_queue_commit(); +# endif + undo_push_insert(p, 1, undo); +#else + modified_count++; +#endif /* ENABLE_FEATURE_VI_UNDO */ + p += 1 + stupid_insert(p, c); // insert the char +#if ENABLE_FEATURE_VI_SETOPTS + if (showmatch && strchr(")]}", c) != NULL) { + showmatching(p - 1); + } + if (autoindent && c == '\n') { // auto indent the new line + char *q; + size_t len; + q = prev_line(p); // use prev line as template + len = strspn(q, " \t"); // space or tab + if (len) { + uintptr_t bias; + bias = text_hole_make(p, len); + p += bias; + q += bias; +#if ENABLE_FEATURE_VI_UNDO + undo_push_insert(p, len, undo); +#endif + memcpy(p, q, len); + p += len; + } + } +#endif + } + return p; +} + +// read text from file or create an empty buf +// will also update current_filename +static int init_text_buffer(char *fn) +{ + int rc; + + // allocate/reallocate text buffer + free(text); + text_size = 10240; + screenbegin = dot = end = text = xzalloc(text_size); + + if (fn != current_filename) { + free(current_filename); + current_filename = xstrdup(fn); + } + rc = file_insert(fn, text, 1); + if (rc < 0) { + // file doesnt exist. Start empty buf with dummy line + char_insert(text, '\n', NO_UNDO); + } + + flush_undo_data(); + modified_count = 0; + last_modified_count = -1; +#if ENABLE_FEATURE_VI_YANKMARK + // init the marks + memset(mark, 0, sizeof(mark)); +#endif + return rc; +} + +#if ENABLE_FEATURE_VI_YANKMARK \ + || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \ + || ENABLE_FEATURE_VI_CRASHME +// might reallocate text[]! use p += string_insert(p, ...), +// and be careful to not use pointers into potentially freed text[]! +# if !ENABLE_FEATURE_VI_UNDO +# define string_insert(a,b,c) string_insert(a,b) +# endif +static uintptr_t string_insert(char *p, const char *s, int undo) // insert the string at 'p' +{ + uintptr_t bias; + int i; + + i = strlen(s); +#if ENABLE_FEATURE_VI_UNDO + undo_push_insert(p, i, undo); +#endif + bias = text_hole_make(p, i); + p += bias; + memcpy(p, s, i); +#if ENABLE_FEATURE_VI_YANKMARK + { + int cnt; + for (cnt = 0; *s != '\0'; s++) { + if (*s == '\n') + cnt++; + } + status_line("Put %d lines (%d chars) from [%c]", cnt, i, what_reg()); + } +#endif + return bias; +} +#endif + +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; + } + // 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 + //modified_count = FALSE; + } else { + charcnt = 0; + } + close(fd); + return charcnt; +} + +#if ENABLE_FEATURE_VI_SEARCH +# if ENABLE_FEATURE_VI_REGEX_SEARCH +// search for pattern starting at p +static char *char_search(char *p, const char *pat, int dir_and_range) +{ + struct re_pattern_buffer preg; + const char *err; + char *q; + int i; + int size; + int range; + + re_syntax_options = RE_SYNTAX_POSIX_EXTENDED; + if (ignorecase) + re_syntax_options = RE_SYNTAX_POSIX_EXTENDED | RE_ICASE; + + memset(&preg, 0, sizeof(preg)); + err = re_compile_pattern(pat, strlen(pat), &preg); + if (err != NULL) { + status_line_bold("bad search pattern '%s': %s", pat, err); + return p; + } + + range = (dir_and_range & 1); + q = end - 1; // if FULL + if (range == LIMITED) + q = next_line(p); + if (dir_and_range < 0) { // BACK? + q = text; + if (range == LIMITED) + q = prev_line(p); + } + + // RANGE could be negative if we are searching backwards + range = q - p; + q = p; + size = range; + if (range < 0) { + size = -size; + 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, /*start:*/ 0, range, /*struct re_registers*:*/ NULL); + regfree(&preg); + if (i < 0) + return NULL; + if (dir_and_range > 0) // FORWARD? + p = p + i; + else + p = p - i; + return p; +} +# else +# if ENABLE_FEATURE_VI_SETOPTS +static int mycmp(const char *s1, const char *s2, int len) +{ + if (ignorecase) { + return strncasecmp(s1, s2, len); + } + return strncmp(s1, s2, len); +} +# else +# define mycmp strncmp +# endif +static char *char_search(char *p, const char *pat, int dir_and_range) +{ + char *start, *stop; + int len; + int range; + + len = strlen(pat); + range = (dir_and_range & 1); + if (dir_and_range > 0) { //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 { //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; +} +# endif +#endif /* FEATURE_VI_SEARCH */ + //----- The Colon commands ------------------------------------- #if ENABLE_FEATURE_VI_COLON static char *get_one_address(char *p, int *addr) // get colon addr, if present @@ -1619,122 +2880,6 @@ static void colon(char *buf) #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 -} - -//----- Dot Movement Routines ---------------------------------- -static void dot_left(void) -{ - undo_queue_commit(); - if (dot > text && dot[-1] != '\n') - dot--; -} - -static void dot_right(void) -{ - undo_queue_commit(); - if (dot < end - 1 && *dot != '\n') - dot++; -} - -static void dot_begin(void) -{ - undo_queue_commit(); - dot = begin_line(dot); // return pointer to first char cur line -} - -static void dot_end(void) -{ - undo_queue_commit(); - 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) -{ - undo_queue_commit(); - dot = next_line(dot); -} - -static void dot_prev(void) -{ - undo_queue_commit(); - dot = prev_line(dot); -} - -static void dot_scroll(int cnt, int dir) -{ - char *q; - - undo_queue_commit(); - 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 char *bound_dot(char *p) // make sure text[0] <= P < "end" -{ - if (p >= end && end > text) { - p = end - 1; - indicate_error(); - } - if (p < text) { - p = text; - indicate_error(); - } - return p; -} - //----- Helper Utility Routines -------------------------------- //---------------------------------------------------------------- @@ -1764,197 +2909,6 @@ static char *new_screen(int ro, int co) return screen; } -#if ENABLE_FEATURE_VI_SEARCH - -# if ENABLE_FEATURE_VI_REGEX_SEARCH - -// search for pattern starting at p -static char *char_search(char *p, const char *pat, int dir_and_range) -{ - struct re_pattern_buffer preg; - const char *err; - char *q; - int i; - int size; - int range; - - re_syntax_options = RE_SYNTAX_POSIX_EXTENDED; - if (ignorecase) - re_syntax_options = RE_SYNTAX_POSIX_EXTENDED | RE_ICASE; - - memset(&preg, 0, sizeof(preg)); - err = re_compile_pattern(pat, strlen(pat), &preg); - if (err != NULL) { - status_line_bold("bad search pattern '%s': %s", pat, err); - return p; - } - - range = (dir_and_range & 1); - q = end - 1; // if FULL - if (range == LIMITED) - q = next_line(p); - if (dir_and_range < 0) { // BACK? - q = text; - if (range == LIMITED) - q = prev_line(p); - } - - // RANGE could be negative if we are searching backwards - range = q - p; - q = p; - size = range; - if (range < 0) { - size = -size; - 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, /*start:*/ 0, range, /*struct re_registers*:*/ NULL); - regfree(&preg); - if (i < 0) - return NULL; - if (dir_and_range > 0) // FORWARD? - p = p + i; - else - p = p - i; - return p; -} - -# else - -# if ENABLE_FEATURE_VI_SETOPTS -static int mycmp(const char *s1, const char *s2, int len) -{ - if (ignorecase) { - return strncasecmp(s1, s2, len); - } - return strncmp(s1, s2, len); -} -# else -# define mycmp strncmp -# endif - -static char *char_search(char *p, const char *pat, int dir_and_range) -{ - char *start, *stop; - int len; - int range; - - len = strlen(pat); - range = (dir_and_range & 1); - if (dir_and_range > 0) { //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 { //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; -} - -# endif - -#endif /* FEATURE_VI_SEARCH */ - -static char *char_insert(char *p, char c, int undo) // insert the char c at 'p' -{ - if (c == 22) { // Is this an ctrl-V? - p += stupid_insert(p, '^'); // use ^ to indicate literal next - refresh(FALSE); // show the ^ - c = get_one_char(); - *p = c; -#if ENABLE_FEATURE_VI_UNDO - undo_push_insert(p, 1, undo); -#else - modified_count++; -#endif /* ENABLE_FEATURE_VI_UNDO */ - p++; - } else if (c == 27) { // Is this an ESC? - cmd_mode = 0; - undo_queue_commit(); - 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 - if (p > text) { - p--; - p = text_hole_delete(p, p, ALLOW_UNDO_QUEUED); // shrink buffer 1 char - } - } else { - // insert a char into text[] - if (c == 13) - c = '\n'; // translate \r to \n -#if ENABLE_FEATURE_VI_UNDO -# if ENABLE_FEATURE_VI_UNDO_QUEUE - if (c == '\n') - undo_queue_commit(); -# endif - undo_push_insert(p, 1, undo); -#else - modified_count++; -#endif /* ENABLE_FEATURE_VI_UNDO */ - p += 1 + stupid_insert(p, c); // insert the char -#if ENABLE_FEATURE_VI_SETOPTS - if (showmatch && strchr(")]}", c) != NULL) { - showmatching(p - 1); - } - if (autoindent && c == '\n') { // auto indent the new line - char *q; - size_t len; - q = prev_line(p); // use prev line as template - len = strspn(q, " \t"); // space or tab - if (len) { - uintptr_t bias; - bias = text_hole_make(p, len); - p += bias; - q += bias; -#if ENABLE_FEATURE_VI_UNDO - undo_push_insert(p, len, undo); -#endif - memcpy(p, q, len); - p += len; - } - } -#endif - } - return p; -} - -// might reallocate text[]! use p += stupid_insert(p, ...), -// and be careful to not use pointers into potentially freed text[]! -static uintptr_t stupid_insert(char *p, char c) // stupidly insert the char c at 'p' -{ - uintptr_t bias; - bias = text_hole_make(p, 1); - p += bias; - *p = c; - return bias; -} - static int st_test(char *p, int type, int dir, char *tested) { char c, c0, ci; @@ -2006,1061 +2960,6 @@ static char *skip_thing(char *p, int linecnt, int dir, int type) return p; } -// find matching char of pair () [] {} -// will crash if c is not one of these -static char *find_pair(char *p, const char c) -{ - const char *braces = "()[]{}"; - char match; - int dir, level; - - dir = strchr(braces, c) - braces; - dir ^= 1; - match = braces[dir]; - dir = ((dir & 1) << 1) - 1; // 1 for ([{, -1 for )\} - - // look for match, count levels of pairs (( )) - level = 1; - for (;;) { - p += dir; - if (p < text || p >= end) - return NULL; - if (*p == c) - level++; // increase pair levels - if (*p == match) { - level--; // reduce pair level - if (level == 0) - return p; // found matching pair - } - } -} - -#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(); // 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 */ - -#if ENABLE_FEATURE_VI_UNDO -static void flush_undo_data(void) -{ - struct undo_object *undo_entry; - - while (undo_stack_tail) { - undo_entry = undo_stack_tail; - undo_stack_tail = undo_entry->prev; - free(undo_entry); - } -} - -// Undo functions and hooks added by Jody Bruchon (jody@jodybruchon.com) -// Add to the undo stack -static void undo_push(char *src, unsigned length, uint8_t u_type) -{ - struct undo_object *undo_entry; - - // "u_type" values - // UNDO_INS: insertion, undo will remove from buffer - // UNDO_DEL: deleted text, undo will restore to buffer - // UNDO_{INS,DEL}_CHAIN: Same as above but also calls undo_pop() when complete - // The CHAIN operations are for handling multiple operations that the user - // performs with a single action, i.e. REPLACE mode or find-and-replace commands - // UNDO_{INS,DEL}_QUEUED: If queuing feature is enabled, allow use of the queue - // for the INS/DEL operation. The raw values should be equal to the values of - // UNDO_{INS,DEL} ORed with UNDO_QUEUED_FLAG - -#if ENABLE_FEATURE_VI_UNDO_QUEUE - // This undo queuing functionality groups multiple character typing or backspaces - // into a single large undo object. This greatly reduces calls to malloc() for - // single-character operations while typing and has the side benefit of letting - // an undo operation remove chunks of text rather than a single character. - switch (u_type) { - case UNDO_EMPTY: // Just in case this ever happens... - return; - case UNDO_DEL_QUEUED: - if (length != 1) - return; // Only queue single characters - switch (undo_queue_state) { - case UNDO_EMPTY: - undo_queue_state = UNDO_DEL; - case UNDO_DEL: - undo_queue_spos = src; - undo_q++; - undo_queue[CONFIG_FEATURE_VI_UNDO_QUEUE_MAX - undo_q] = *src; - // If queue is full, dump it into an object - if (undo_q == CONFIG_FEATURE_VI_UNDO_QUEUE_MAX) - undo_queue_commit(); - return; - case UNDO_INS: - // Switch from storing inserted text to deleted text - undo_queue_commit(); - undo_push(src, length, UNDO_DEL_QUEUED); - return; - } - break; - case UNDO_INS_QUEUED: - if (length < 1) - return; - switch (undo_queue_state) { - case UNDO_EMPTY: - undo_queue_state = UNDO_INS; - undo_queue_spos = src; - case UNDO_INS: - while (length--) { - undo_q++; // Don't need to save any data for insertions - if (undo_q == CONFIG_FEATURE_VI_UNDO_QUEUE_MAX) - undo_queue_commit(); - } - return; - case UNDO_DEL: - // Switch from storing deleted text to inserted text - undo_queue_commit(); - undo_push(src, length, UNDO_INS_QUEUED); - return; - } - break; - } -#else - // If undo queuing is disabled, ignore the queuing flag entirely - u_type = u_type & ~UNDO_QUEUED_FLAG; -#endif - - // Allocate a new undo object - if (u_type == UNDO_DEL || u_type == UNDO_DEL_CHAIN) { - // For UNDO_DEL objects, save deleted text - if ((text + length) == end) - length--; - // If this deletion empties text[], strip the newline. When the buffer becomes - // zero-length, a newline is added back, which requires this to compensate. - undo_entry = xzalloc(offsetof(struct undo_object, undo_text) + length); - memcpy(undo_entry->undo_text, src, length); - } else { - undo_entry = xzalloc(sizeof(*undo_entry)); - } - undo_entry->length = length; -#if ENABLE_FEATURE_VI_UNDO_QUEUE - if ((u_type & UNDO_USE_SPOS) != 0) { - undo_entry->start = undo_queue_spos - text; // use start position from queue - } else { - undo_entry->start = src - text; // use offset from start of text buffer - } - u_type = (u_type & ~UNDO_USE_SPOS); -#else - undo_entry->start = src - text; -#endif - undo_entry->u_type = u_type; - - // Push it on undo stack - undo_entry->prev = undo_stack_tail; - undo_stack_tail = undo_entry; - modified_count++; -} - -static void undo_push_insert(char *p, int len, int undo) -{ - switch (undo) { - case ALLOW_UNDO: - undo_push(p, len, UNDO_INS); - break; - case ALLOW_UNDO_CHAIN: - undo_push(p, len, UNDO_INS_CHAIN); - break; -# if ENABLE_FEATURE_VI_UNDO_QUEUE - case ALLOW_UNDO_QUEUED: - undo_push(p, len, UNDO_INS_QUEUED); - break; -# endif - } -} - -// Undo the last operation -static void undo_pop(void) -{ - int repeat; - char *u_start, *u_end; - struct undo_object *undo_entry; - - // Commit pending undo queue before popping (should be unnecessary) - undo_queue_commit(); - - undo_entry = undo_stack_tail; - // Check for an empty undo stack - if (!undo_entry) { - status_line("Already at oldest change"); - return; - } - - switch (undo_entry->u_type) { - case UNDO_DEL: - case UNDO_DEL_CHAIN: - // make hole and put in text that was deleted; deallocate text - u_start = text + undo_entry->start; - text_hole_make(u_start, undo_entry->length); - memcpy(u_start, undo_entry->undo_text, undo_entry->length); - status_line("Undo [%d] %s %d chars at position %d", - modified_count, "restored", - undo_entry->length, undo_entry->start - ); - break; - case UNDO_INS: - case UNDO_INS_CHAIN: - // delete what was inserted - u_start = undo_entry->start + text; - u_end = u_start - 1 + undo_entry->length; - text_hole_delete(u_start, u_end, NO_UNDO); - status_line("Undo [%d] %s %d chars at position %d", - modified_count, "deleted", - undo_entry->length, undo_entry->start - ); - break; - } - repeat = 0; - switch (undo_entry->u_type) { - // If this is the end of a chain, lower modification count and refresh display - case UNDO_DEL: - case UNDO_INS: - dot = (text + undo_entry->start); - refresh(FALSE); - break; - case UNDO_DEL_CHAIN: - case UNDO_INS_CHAIN: - repeat = 1; - break; - } - // Deallocate the undo object we just processed - undo_stack_tail = undo_entry->prev; - free(undo_entry); - modified_count--; - // For chained operations, continue popping all the way down the chain. - if (repeat) { - undo_pop(); // Follow the undo chain if one exists - } -} - -#if ENABLE_FEATURE_VI_UNDO_QUEUE -// Flush any queued objects to the undo stack -static void undo_queue_commit(void) -{ - // Pushes the queue object onto the undo stack - if (undo_q > 0) { - // Deleted character undo events grow from the end - undo_push(undo_queue + CONFIG_FEATURE_VI_UNDO_QUEUE_MAX - undo_q, - undo_q, - (undo_queue_state | UNDO_USE_SPOS) - ); - undo_queue_state = UNDO_EMPTY; - undo_q = 0; - } -} -#endif - -#endif /* ENABLE_FEATURE_VI_UNDO */ - -// open a hole in text[] -// might reallocate text[]! use p += text_hole_make(p, ...), -// and be careful to not use pointers into potentially freed text[]! -static uintptr_t text_hole_make(char *p, int size) // at "p", make a 'size' byte hole -{ - uintptr_t bias = 0; - - if (size <= 0) - return bias; - 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); - bias = (new_text - text); - screenbegin += bias; - dot += bias; - end += bias; - p += bias; -#if ENABLE_FEATURE_VI_YANKMARK - { - int i; - for (i = 0; i < ARRAY_SIZE(mark); i++) - if (mark[i]) - mark[i] += bias; - } -#endif - text = new_text; - } - memmove(p + size, p, end - size - p); - memset(p, ' ', size); // clear new hole - return bias; -} - -// close a hole in text[] -// "undo" value indicates if this operation should be undo-able -static char *text_hole_delete(char *p, char *q, int undo) // 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 ENABLE_FEATURE_VI_UNDO - switch (undo) { - case NO_UNDO: - break; - case ALLOW_UNDO: - undo_push(p, hole_size, UNDO_DEL); - break; - case ALLOW_UNDO_CHAIN: - undo_push(p, hole_size, UNDO_DEL_CHAIN); - break; -# if ENABLE_FEATURE_VI_UNDO_QUEUE - case ALLOW_UNDO_QUEUED: - undo_push(p, hole_size, UNDO_DEL_QUEUED); - break; -# endif - } - modified_count--; -#endif - if (src < text || src > end) - goto thd0; - if (dest < text || dest >= end) - goto thd0; - modified_count++; - 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 - 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, int undo) -{ - 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, undo); - } // delete lines - return p; -} - -#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 -// might reallocate text[]! use p += string_insert(p, ...), -// and be careful to not use pointers into potentially freed text[]! -static uintptr_t string_insert(char *p, const char *s, int undo) // insert the string at 'p' -{ - uintptr_t bias; - int i; - - i = strlen(s); -#if ENABLE_FEATURE_VI_UNDO - undo_push_insert(p, i, undo); -#endif - bias = text_hole_make(p, i); - p += bias; - memcpy(p, s, i); -#if ENABLE_FEATURE_VI_YANKMARK - { - int cnt; - for (cnt = 0; *s != '\0'; s++) { - if (*s == '\n') - cnt++; - } - status_line("Put %d lines (%d chars) from [%c]", cnt, i, what_reg()); - } -#endif - return bias; -} -#endif - -#if ENABLE_FEATURE_VI_YANKMARK -static char *text_yank(char *p, char *q, int dest) // copy text into a register -{ - int cnt = q - p; - if (cnt < 0) { // they are backwards- reverse them - p = q; - cnt = -cnt; - } - free(reg[dest]); // if already a yank register, free it - reg[dest] = xstrndup(p, cnt + 1); - 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] = p; - mark[26] = p = tmp; - context_start = prev_line(prev_line(prev_line(p))); - context_end = next_line(next_line(next_line(p))); - } - return p; -} -#endif /* FEATURE_VI_YANKMARK */ - -//----- IO Routines -------------------------------------------- -static int readit(void) // read (maybe cursor) key from stdin -{ - int c; - - fflush_all(); - - // Wait for input. TIMEOUT = -1 makes read_key wait even - // on nonblocking stdin. - // Note: read_key sets errno to 0 on success. - again: - c = read_key(STDIN_FILENO, readbuffer, /*timeout:*/ -1); - if (c == -1) { // EOF/error - if (errno == EAGAIN) // paranoia - goto again; - 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 -} - -// might reallocate text[]! -static int file_insert(const char *fn, char *p, int initial) -{ - int cnt = -1; - int fd, size; - struct stat statbuf; - - if (p < text) - p = text; - if (p > end) - p = end; - - fd = open(fn, O_RDONLY); - if (fd < 0) { - if (!initial) - status_line_bold_errno(fn); - return cnt; - } - - // Validate file - if (fstat(fd, &statbuf) < 0) { - status_line_bold_errno(fn); - goto fi; - } - if (!S_ISREG(statbuf.st_mode)) { - status_line_bold("'%s' is not a regular file", fn); - goto fi; - } - size = (statbuf.st_size < INT_MAX ? (int)statbuf.st_size : INT_MAX); - p += text_hole_make(p, size); - cnt = full_read(fd, p, size); - if (cnt < 0) { - status_line_bold_errno(fn); - p = text_hole_delete(p, p + size - 1, NO_UNDO); // un-do buffer insert - } else if (cnt < size) { - // There was a partial read, shrink unused space - p = text_hole_delete(p + cnt, p + size - 1, NO_UNDO); - status_line_bold("can't read '%s'", fn); - } - fi: - close(fd); - -#if ENABLE_FEATURE_VI_READONLY - if (initial - && ((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; - } - // 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 - //modified_count = FALSE; - } else { - charcnt = 0; - } - close(fd); - return charcnt; -} - -//----- Flash the screen -------------------------------------- -static void flash(int h) -{ - standout_start(); - redraw(TRUE); - mysleep(h); - standout_end(); - redraw(TRUE); -} - -static void indicate_error(void) -{ -#if ENABLE_FEATURE_VI_CRASHME - if (crashme > 0) - return; -#endif - if (!err_method) { - write1(ESC_BELL); - } else { - flash(10); - } -} - -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); // put cursor back in correct place - } - fflush_all(); -} - -//----- 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, ESC_BOLD_TEXT); - vsprintf(status_buffer + sizeof(ESC_BOLD_TEXT)-1, format, args); - strcat(status_buffer, ESC_NORM_TEXT); - va_end(args); - - have_status_msg = 1 + sizeof(ESC_BOLD_TEXT) + sizeof(ESC_NORM_TEXT) - 2; -} - -static void status_line_bold_errno(const char *fn) -{ - status_line_bold("'%s' "STRERROR_FMT, fn STRERROR_ERRNO); -} - -// 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) -{ - char *d; - unsigned char c; - - buf[0] = '\0'; - if (!s[0]) - s = "(NULL)"; - - d = buf; - for (; *s; s++) { - int c_is_no_print; - - c = *s; - c_is_no_print = (c & 0x80) && !Isprint(c); - if (c_is_no_print) { - strcpy(d, ESC_NORM_TEXT); - d += sizeof(ESC_NORM_TEXT)-1; - c = '.'; - } - if (c < ' ' || c == 0x7f) { - *d++ = '^'; - c |= '@'; // 0x40 - if (c == 0x7f) - c = '?'; - } - *d++ = c; - *d = '\0'; - if (c_is_no_print) { - strcpy(d, ESC_BOLD_TEXT); - d += sizeof(ESC_BOLD_TEXT)-1; - } - if (*s == '\n') { - *d++ = '$'; - *d = '\0'; - } - if (d - 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; - - // modified_count 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); - - // count_lines() is expensive. - // Call it only if something was changed since last time - // we were here: - if (modified_count != last_modified_count) { - tot = cur + count_lines(dot, end - 1) - 1; - last_modified_count = modified_count; - } - - // 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 - (modified_count ? " [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) -{ - // cursor to top,left; clear to the end of screen - write1(ESC_SET_CURSOR_TOPLEFT ESC_CLEAR2EOS); - 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 IF_FEATURE_VI_ASK_TERMINAL(&& !G.get_rowcol_error) ) { - unsigned c = columns, r = rows; - query_screen_dimensions(); -#if ENABLE_FEATURE_VI_USE_SIGNALS - full_screen |= (c - columns) | (r - rows); -#else - if (c != columns || r != rows) { - full_screen = TRUE; - // update screen memory since SIGWINCH won't have done it - new_screen(rows, columns); - } -#endif - } - 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 virtual 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 virtual screen and out_buf - if (changed) { - // copy changed part of buffer to virtual screen - memcpy(sp+cs, out_buf+cs, ce-cs+1); - place_cursor(li, cs); - // write line out to terminal - fwrite(&sp[cs], ce - cs + 1, 1, stdout); - } - } - - place_cursor(crow, ccol); - - old_offset = offset; -#undef old_offset -} - #if ENABLE_FEATURE_VI_USE_SIGNALS static void winch_handler(int sig UNUSED_PARAM) { |