| /* 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, |
| }; |
| |
| // Misc. non-Ascii keys that report an escape sequence |
| #define VI_K_UP (char)128 // cursor key Up |
| #define VI_K_DOWN (char)129 // cursor key Down |
| #define VI_K_RIGHT (char)130 // Cursor Key Right |
| #define VI_K_LEFT (char)131 // cursor key Left |
| #define VI_K_HOME (char)132 // Cursor Key Home |
| #define VI_K_END (char)133 // Cursor Key End |
| #define VI_K_INSERT (char)134 // Cursor Key Insert |
| #define VI_K_DELETE (char)135 // Cursor Key Insert |
| #define VI_K_PAGEUP (char)136 // Cursor Key Page Up |
| #define VI_K_PAGEDOWN (char)137 // Cursor Key Page Down |
| #define VI_K_FUN1 (char)138 // Function Key F1 |
| #define VI_K_FUN2 (char)139 // Function Key F2 |
| #define VI_K_FUN3 (char)140 // Function Key F3 |
| #define VI_K_FUN4 (char)141 // Function Key F4 |
| #define VI_K_FUN5 (char)142 // Function Key F5 |
| #define VI_K_FUN6 (char)143 // Function Key F6 |
| #define VI_K_FUN7 (char)144 // Function Key F7 |
| #define VI_K_FUN8 (char)145 // Function Key F8 |
| #define VI_K_FUN9 (char)146 // Function Key F9 |
| #define VI_K_FUN10 (char)147 // Function Key F10 |
| #define VI_K_FUN11 (char)148 // Function Key F11 |
| #define VI_K_FUN12 (char)149 // Function Key F12 |
| |
| /* 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"; |
| |
| |
| enum { |
| YANKONLY = FALSE, |
| YANKDEL = TRUE, |
| FORWARD = 1, // code depends on "1" for array index |
| BACK = -1, // code depends on "-1" for array index |
| LIMITED = 0, // how much of text[] in char_search |
| FULL = 1, // how much of text[] in char_search |
| |
| S_BEFORE_WS = 1, // used in skip_thing() for moving "dot" |
| S_TO_WS = 2, // used in skip_thing() for moving "dot" |
| S_OVER_WS = 3, // used in skip_thing() for moving "dot" |
| S_END_PUNCT = 4, // used in skip_thing() for moving "dot" |
| S_END_ALNUM = 5, // used in skip_thing() for moving "dot" |
| }; |
| |
| /* vi.c expects chars to be unsigned. */ |
| /* busybox build system provides that, but it's better */ |
| /* to audit and fix the source */ |
| |
| static 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) |
| |
| |
| static smallint editing; // >0 while we are editing a file |
| // [code audit says "can be 0 or 1 only"] |
| static smallint cmd_mode; // 0=command 1=insert 2=replace |
| static smallint file_modified; // buffer contents changed |
| static smallint last_file_modified = -1; |
| static int fn_start; // index of first cmd line file name |
| static int save_argc; // how many file names on cmd line |
| static int cmdcnt; // repetition count |
| static int rows, columns; // the terminal screen is this size |
| static int crow, ccol; // cursor is on Crow x Ccol |
| static int offset; // chars scrolled off the screen to the left |
| static char *status_buffer; // mesages to the user |
| #define STATUS_BUFFER_LEN 200 |
| static int have_status_msg; // is default edit status needed? |
| // [don't make smallint!] |
| static int last_status_cksum; // hash of current status line |
| static char *current_filename; // current file name |
| //static char *text, *end; // pointers to the user data in memory |
| static char *screen; // pointer to the virtual screen buffer |
| static int screensize; // and its size |
| static char *screenbegin; // index into text[], of top line on the screen |
| //static char *dot; // where all the action takes place |
| static int tabstop; |
| static char erase_char; // the users erase character |
| static char last_input_char; // last char read from user |
| static char last_forward_char; // last char searched for with 'f' |
| |
| #if ENABLE_FEATURE_VI_READONLY |
| //static smallint vi_readonly, readonly; |
| static smallint readonly_mode = 0; |
| #define SET_READONLY_FILE(flags) ((flags) |= 0x01) |
| #define SET_READONLY_MODE(flags) ((flags) |= 0x02) |
| #define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe) |
| #else |
| #define readonly_mode 0 |
| #define SET_READONLY_FILE(flags) |
| #define SET_READONLY_MODE(flags) |
| #define UNSET_READONLY_FILE(flags) |
| #endif |
| |
| #if ENABLE_FEATURE_VI_DOT_CMD |
| static smallint adding2q; // are we currently adding user input to q |
| static char *last_modifying_cmd; // [MAX_INPUT_LEN] last modifying cmd for "." |
| static smallint lmc_len; // length of last_modifying_cmd |
| static char *ioq, *ioq_start; // pointer to string for get_one_char to "read" |
| #endif |
| #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR |
| static int last_row; // where the cursor was last moved to |
| #endif |
| #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME |
| static int my_pid; |
| #endif |
| #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK |
| static char *modifying_cmds; // cmds that modify text[] |
| #endif |
| #if ENABLE_FEATURE_VI_SEARCH |
| static char *last_search_pattern; // last pattern from a '/' or '?' search |
| #endif |
| |
| /* Moving biggest data to malloced space... */ |
| 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 |
| #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 |
| /* a few references only */ |
| #if ENABLE_FEATURE_VI_USE_SIGNALS |
| jmp_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 CRASME mode uses it as generated command buffer too |
| #if ENABLE_FEATURE_VI_CRASHME |
| char readbuffer[128]; |
| #else |
| char readbuffer[32]; |
| #endif |
| |
| 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 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 INIT_G() do { \ |
| SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ |
| } 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(char); // 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 char readit(void); // read (maybe cursor) key from stdin |
| static char get_one_char(void); // read 1 char from stdin |
| static int file_size(const char *); // what is the byte size of "fn" |
| #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 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; |
| RESERVE_CONFIG_BUFFER(STATUS_BUFFER, STATUS_BUFFER_LEN); |
| |
| #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME |
| my_pid = getpid(); |
| #endif |
| |
| INIT_G(); |
| |
| #if ENABLE_FEATURE_VI_CRASHME |
| srand((long) my_pid); |
| #endif |
| |
| status_buffer = STATUS_BUFFER; |
| last_status_cksum = 0; |
| text = NULL; |
| |
| #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; |
| #if ENABLE_FEATURE_VI_YANKMARK |
| memset(reg, 0, sizeof(reg)); // init the yank regs |
| #endif |
| #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK |
| modifying_cmds = (char *) "aAcCdDiIJoOpPrRsxX<>~"; // cmds modifying text[] |
| #endif |
| |
| // 1- process $HOME/.exrc file (not inplemented yet) |
| // 2- process EXINIT variable from environment |
| // 3- process command line args |
| #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 * 2; |
| if (text_size < 10240) |
| text_size = 10240; // have a minimum size for new files |
| 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) |
| { |
| char c; |
| int size; |
| |
| #if ENABLE_FEATURE_VI_USE_SIGNALS |
| int sig; |
| #endif |
| #if ENABLE_FEATURE_VI_YANKMARK |
| static char *cur_line; |
| #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 = setjmp(restart); |
| 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 |
| && strchr(modifying_cmds, c) |
| ) { |
| start_new_cmd_q(c); |
| } |
| #endif |
| do_cmd(c); // execute the user command |
| // |
| // poll to see if there is input already waiting. if we are |
| // not able to display output fast enough to keep up, skip |
| // the display update until we catch up with input. |
| if (mysleep(0) == 0) { |
| // no input pending- so update output |
| refresh(FALSE); |
| show_status_line(); |
| } |
| #if ENABLE_FEATURE_VI_CRASHME |
| if (crashme > 0) |
| crash_test(); // test editor variables |
| #endif |
| } |
| //------------------------------------------------------------------- |
| |
| place_cursor(rows, 0, FALSE); // go to bottom of screen |
| clear_to_eol(); // Erase to end of line |
| cookmode(); |
| } |
| |
| //----- The Colon commands ------------------------------------- |
| #if ENABLE_FEATURE_VI_COLON |
| static char *get_one_address(char *p, int *addr) // get colon addr, if present |
| { |
| int st; |
| char *q; |
| 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> |
| alarm(0); // wait for input- no alarms |
| place_cursor(rows - 1, 0, FALSE); // go to Status line |
| clear_to_eol(); // clear the line |
| 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 |
| alarm(3); // done waiting for input |
| } |
| #endif |
| else if (strncmp(cmd, "=", i) == 0) { // where is the address |
| if (b < 0) { // no addr given- use defaults |
| b = e = count_lines(text, dot); |
| } |
| 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 |
| place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen |
| clear_to_eol(); // clear the line |
| cookmode(); |
| show_help(); |
| rawmode(); |
| Hit_Return(); |
| } else if (strncasecmp(cmd, "list", i) == 0) { // literal print line |
| if (b < 0) { // no addr given- use defaults |
| q = begin_line(dot); // assume .,. for the range |
| r = end_line(dot); |
| } |
| place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen |
| clear_to_eol(); // clear the line |
| puts("\r"); |
| for (; q <= r; q++) { |
| int c_is_no_print; |
| |
| c = *q; |
| c_is_no_print = (c & 0x80) && !Isprint(c); |
| if (c_is_no_print) { |
| c = '.'; |
| standout_start(); |
| } |
| if (c == '\n') { |
| write1("$\r"); |
| } else if (c < ' ' || c == 127) { |
| 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 |
| place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen |
| clear_to_eol(); // clear the line |
| printf("----------------------------------------\r\n"); |
| #if ENABLE_FEATURE_VI_SETOPTS |
| if (!autoindent) |
| printf("no"); |
| printf("autoindent "); |
| if (!err_method) |
| printf("no"); |
| printf("flash "); |
| if (!ignorecase) |
| printf("no"); |
| printf("ignorecase "); |
| if (!showmatch) |
| printf("no"); |
| printf("showmatch "); |
| printf("tabstop=%d ", tabstop); |
| #endif |
| printf("\r\n"); |
| goto vc2; |
| } |
| #if ENABLE_FEATURE_VI_SETOPTS |
| argp = args; |
| while (*argp) { |
| if (strncasecmp(argp, "no", 2) == 0) |
| i = 2; // ":set noautoindent" |
| setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT); |
| setops(argp, "flash ", i, "fl", VI_ERR_METHOD); |
| setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE); |
| setops(argp, "showmatch ", i, "ic", VI_SHOWMATCH); |
| /* tabstopXXXX */ |
| if (strncasecmp(argp + i, "tabstop=%d ", 7) == 0) { |
| sscanf(strchr(argp + i, '='), "tabstop=%d" + 7, &ch); |
| if (ch > 0 && ch <= 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("%s", BB_VER " " BB_BT); |
| } else if (strncasecmp(cmd, "write", i) == 0 // write text to file |
| || strncasecmp(cmd, "wq", i) == 0 |
| || strncasecmp(cmd, "wn", i) == 0 |
| || strncasecmp(cmd, "x", i) == 0 |
| ) { |
| // is there a file name to write to? |
| if (args[0]) { |
| fn = args; |
| } |
| #if ENABLE_FEATURE_VI_READONLY |
| if (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) |
| { |
| char 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; |
| } else { |
| 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 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[-1] == '\n' && p > text) |
| p--; // step to prev line |
| p = begin_line(p); // goto begining of prev line |
| return p; |
| } |
| |
| static char *next_line(char *p) // return pointer first char next line |
| { |
| p = end_line(p); |
| if (*p == '\n' && p < end - 1) |
| p++; // step to next line |
| return p; |
| } |
| |
| //----- Text Information Routines ------------------------------ |
| static char *end_screen(void) |
| { |
| char *q; |
| int cnt; |
| |
| // find new bottom line |
| q = screenbegin; |
| for (cnt = 0; cnt < rows - 2; cnt++) |
| q = next_line(q); |
| q = end_line(q); |
| return q; |
| } |
| |
| // 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++; // has the file been modified |
| } else if (c == 27) { // Is this an ESC? |
| cmd_mode = 0; |
| cmdcnt = 0; |
| end_cmd_q(); // stop adding to q |
| last_status_cksum = 0; // force status update |
| if ((p[-1] != '\n') && (dot > text)) { |
| p--; |
| } |
| } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS |
| // 123456789 |
| if ((p[-1] != '\n') && (dot>text)) { |
| p--; |
| p = text_hole_delete(p, p); // shrink buffer 1 char |
| } |
| } else { |
| // insert a char into text[] |
| char *sp; // "save p" |
| |
| if (c == 13) |
| c = '\n'; // translate \r to \n |
| sp = p; // remember addr of insert |
| p = stupid_insert(p, c); // insert the char |
| #if ENABLE_FEATURE_VI_SETOPTS |
| if (showmatch && strchr(")]}", *sp) != NULL) { |
| showmatching(sp); |
| } |
| if (autoindent && c == '\n') { // auto indent the new line |
| char *q; |
| |
| q = prev_line(p); // use prev line as templet |
| for (; 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); |
| if (p != 0) { |
| *p = c; |
| file_modified++; // has the file been modified |
| p++; |
| } |
| return p; |
| } |
| |
| 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 |
| { |
| char *src, *dest; |
| int cnt; |
| |
| if (size <= 0) |
| goto thm0; |
| src = p; |
| dest = p + size; |
| cnt = end - src; // the rest of buffer |
| if ( ((end + size) >= (text + text_size)) // TODO: realloc here |
| || memmove(dest, src, cnt) != dest) { |
| status_line_bold("can't create room for new characters"); |
| p = NULL; |
| goto thm0; |
| } |
| memset(p, ' ', size); // clear new hole |
| end += size; // adjust the new END |
| file_modified++; // has the file been modified |
| thm0: |
| return p; |
| } |
| |
| // close a hole in text[] |
| static char *text_hole_delete(char * p, char * q) // delete "p" 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 |
| if (memmove(dest, src, cnt) != dest) { |
| status_line_bold("can't delete the character"); |
| } |
| thd_atend: |
| end = end - hole_size; // adjust the new END |
| if (dest >= end) |
| dest = end - 1; // make sure dest in below end-1 |
| if (end <= text) |
| dest = end = text; // keep pointers valid |
| file_modified++; // has the file been modified |
| thd0: |
| return dest; |
| } |
| |
| // copy text into register, then delete text. |
| // if dist <= 0, do not include, or go past, a NewLine |
| // |
| static char *yank_delete(char * start, char * stop, int dist, int yf) |
| { |
| char *p; |
| |
| // make sure start <= stop |
| if (start > stop) { |
| // they are backwards, reverse them |
| p = start; |
| start = stop; |
| stop = p; |
| } |
| if (dist <= 0) { |
| // we cannot cross NL boundaries |
| p = start; |
| if (*p == '\n') |
| return p; |
| // dont go past a NewLine |
| for (; p + 1 <= stop; p++) { |
| if (p[1] == '\n') { |
| stop = p; // "stop" just before NewLine |
| break; |
| } |
| } |
| } |
| p = start; |
| #if ENABLE_FEATURE_VI_YANKMARK |
| text_yank(start, stop, YDreg); |
| #endif |
| if (yf == YANKDEL) { |
| p = text_hole_delete(start, stop); |
| } // delete lines |
| return p; |
| } |
| |
| static void show_help(void) |
| { |
| puts("These features are available:" |
| #if ENABLE_FEATURE_VI_SEARCH |
| "\n\tPattern searches with / and ?" |
| #endif |
| #if ENABLE_FEATURE_VI_DOT_CMD |
| "\n\tLast command repeat with \'.\'" |
| #endif |
| #if ENABLE_FEATURE_VI_YANKMARK |
| "\n\tLine marking with 'x" |
| "\n\tNamed buffers with \"x" |
| #endif |
| #if ENABLE_FEATURE_VI_READONLY |
| "\n\tReadonly if vi is called as \"view\"" |
| "\n\tReadonly with -R command line arg" |
| #endif |
| #if ENABLE_FEATURE_VI_SET |
| "\n\tSome colon mode commands with \':\'" |
| #endif |
| #if ENABLE_FEATURE_VI_SETOPTS |
| "\n\tSettable options with \":set\"" |
| #endif |
| #if ENABLE_FEATURE_VI_USE_SIGNALS |
| "\n\tSignal catching- ^C" |
| "\n\tJob suspend and resume with ^Z" |
| #endif |
| #if ENABLE_FEATURE_VI_WIN_RESIZE |
| "\n\tAdapt to window re-sizes" |
| #endif |
| ); |
| } |
| |
| #if ENABLE_FEATURE_VI_DOT_CMD |
| static void start_new_cmd_q(char c) |
| { |
| // get buffer for new cmd |
| if (!last_modifying_cmd) |
| last_modifying_cmd = xzalloc(MAX_INPUT_LEN); |
| // 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); |
| if (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(0, TCSANOW, &term_vi); |
| } |
| |
| static void cookmode(void) |
| { |
| fflush(stdout); |
| tcsetattr(0, TCSANOW, &term_orig); |
| } |
| |
| //----- Come here when we get a window resize signal --------- |
| #if ENABLE_FEATURE_VI_USE_SIGNALS |
| static void winch_sig(int sig ATTRIBUTE_UNUSED) |
| { |
| // 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 ATTRIBUTE_UNUSED) |
| { |
| rawmode(); // terminal to "raw" |
| last_status_cksum = 0; // force status update |
| redraw(TRUE); // re-draw the screen |
| |
| signal(SIGTSTP, suspend_sig); |
| signal(SIGCONT, SIG_DFL); |
| kill(my_pid, SIGCONT); |
| } |
| |
| //----- Come here when we get a Suspend signal ------------------- |
| static void suspend_sig(int sig ATTRIBUTE_UNUSED) |
| { |
| place_cursor(rows - 1, 0, FALSE); // go to bottom of screen |
| clear_to_eol(); // Erase to end of line |
| cookmode(); // terminal to "cooked" |
| |
| signal(SIGCONT, cont_sig); |
| signal(SIGTSTP, SIG_DFL); |
| kill(my_pid, SIGTSTP); |
| } |
| |
| //----- Come here when we get a signal --------------------------- |
| static void catch_sig(int sig) |
| { |
| signal(SIGINT, catch_sig); |
| if (sig) |
| longjmp(restart, sig); |
| } |
| #endif /* FEATURE_VI_USE_SIGNALS */ |
| |
| static int mysleep(int hund) // sleep for 'h' 1/100 seconds |
| { |
| struct pollfd pfd[1]; |
| |
| pfd[0].fd = 0; |
| pfd[0].events = POLLIN; |
| return safe_poll(pfd, 1, hund*10) > 0; |
| } |
| |
| static int chars_to_parse; |
| |
| //----- IO Routines -------------------------------------------- |
| static char readit(void) // read (maybe cursor) key from stdin |
| { |
| char c; |
| int n; |
| struct esc_cmds { |
| const char seq[4]; |
| char val; |
| }; |
| |
| static const struct esc_cmds esccmds[] = { |
| {"OA" , VI_K_UP }, // cursor key Up |
| {"OB" , VI_K_DOWN }, // cursor key Down |
| {"OC" , VI_K_RIGHT }, // Cursor Key Right |
| {"OD" , VI_K_LEFT }, // cursor key Left |
| {"OH" , VI_K_HOME }, // Cursor Key Home |
| {"OF" , VI_K_END }, // Cursor Key End |
| {"[A" , VI_K_UP }, // cursor key Up |
| {"[B" , VI_K_DOWN }, // cursor key Down |
| {"[C" , VI_K_RIGHT }, // Cursor Key Right |
| {"[D" , VI_K_LEFT }, // cursor key Left |
| {"[H" , VI_K_HOME }, // Cursor Key Home |
| {"[F" , VI_K_END }, // Cursor Key End |
| {"[1~" , VI_K_HOME }, // Cursor Key Home |
| {"[2~" , VI_K_INSERT }, // Cursor Key Insert |
| {"[3~" , VI_K_DELETE }, // Cursor Key Delete |
| {"[4~" , VI_K_END }, // Cursor Key End |
| {"[5~" , VI_K_PAGEUP }, // Cursor Key Page Up |
| {"[6~" , VI_K_PAGEDOWN}, // Cursor Key Page Down |
| {"OP" , VI_K_FUN1 }, // Function Key F1 |
| {"OQ" , VI_K_FUN2 }, // Function Key F2 |
| {"OR" , VI_K_FUN3 }, // Function Key F3 |
| {"OS" , VI_K_FUN4 }, // Function Key F4 |
| // careful: these have no terminating NUL! |
| {"[11~", VI_K_FUN1 }, // Function Key F1 |
| {"[12~", VI_K_FUN2 }, // Function Key F2 |
| {"[13~", VI_K_FUN3 }, // Function Key F3 |
| {"[14~", VI_K_FUN4 }, // Function Key F4 |
| {"[15~", VI_K_FUN5 }, // Function Key F5 |
| {"[17~", VI_K_FUN6 }, // Function Key F6 |
| {"[18~", VI_K_FUN7 }, // Function Key F7 |
| {"[19~", VI_K_FUN8 }, // Function Key F8 |
| {"[20~", VI_K_FUN9 }, // Function Key F9 |
| {"[21~", VI_K_FUN10 }, // Function Key F10 |
| {"[23~", VI_K_FUN11 }, // Function Key F11 |
| {"[24~", VI_K_FUN12 }, // Function Key F12 |
| }; |
| enum { ESCCMDS_COUNT = ARRAY_SIZE(esccmds) }; |
| |
| alarm(0); // turn alarm OFF while we wait for input |
| fflush(stdout); |
| n = chars_to_parse; |
| // get input from User- are there already input chars in Q? |
| if (n <= 0) { |
| // the Q is empty, wait for a typed char |
| n = safe_read(0, readbuffer, sizeof(readbuffer)); |
| if (n < 0) { |
| if (errno == EBADF || errno == EFAULT || errno == EINVAL |
| || errno == EIO) |
| editing = 0; // want to exit |
| errno = 0; |
| } |
| if (n <= 0) |
| return 0; // error |
| if (readbuffer[0] == 27) { |
| // This is an ESC char. Is this Esc sequence? |
| // Could be bare Esc key. See if there are any |
| // more chars to read after the ESC. This would |
| // be a Function or Cursor Key sequence. |
| struct pollfd pfd[1]; |
| pfd[0].fd = 0; |
| pfd[0].events = POLLIN; |
| // keep reading while there are input chars, and room in buffer |
| // for a complete ESC sequence (assuming 8 chars is enough) |
| while (safe_poll(pfd, 1, 0) > 0 && n <= (sizeof(readbuffer) - 8)) { |
| // read the rest of the ESC string |
| int r = safe_read(0, readbuffer + n, sizeof(readbuffer) - n); |
| if (r > 0) |
| n += r; |
| } |
| } |
| chars_to_parse = n; |
| } |
| c = readbuffer[0]; |
| if (c == 27 && n > 1) { |
| // Maybe cursor or function key? |
| const struct esc_cmds *eindex; |
| |
| for (eindex = esccmds; eindex < &esccmds[ESCCMDS_COUNT]; eindex++) { |
| int cnt = strnlen(eindex->seq, 4); |
| if (n <= cnt) |
| continue; |
| if (strncmp(eindex->seq, readbuffer + 1, cnt) != 0) |
| continue; |
| c = eindex->val; // magic char value |
| n = cnt + 1; // squeeze out the ESC sequence |
| goto found; |
| } |
| // defined ESC sequence not found |
| } |
| n = 1; |
| found: |
| // remove key sequence from Q |
| chars_to_parse -= n; |
| memmove(readbuffer, readbuffer + n, sizeof(readbuffer) - n); |
| alarm(3); // we are done waiting for input, turn alarm ON |
| return c; |
| } |
| |
| //----- IO Routines -------------------------------------------- |
| static char get_one_char(void) |
| { |
| char 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 |
| c = *ioq++; |
| if (c == '\0') { |
| // the end of the q, read from STDIN |
| free(ioq_start); |
| ioq_start = ioq = 0; |
| c = readit(); // get the users input |
| } |
| } |
| } else { |
| // adding STDIN chars to q |
| c = readit(); // get the users input |
| if (last_modifying_cmd != NULL) { |
| 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) |
| { |
| static char *buf; // [MAX_INPUT_LEN] |
| |
| char c; |
| int i; |
| |
| if (!buf) buf = xmalloc(MAX_INPUT_LEN); |
| |
| strcpy(buf, prompt); |
| last_status_cksum = 0; // force status update |
| place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen |
| clear_to_eol(); // clear the line |
| write1(prompt); // write out the :, /, or ? prompt |
| |
| i = strlen(buf); |
| while (i < 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 { |
| buf[i] = c; |
| buf[++i] = '\0'; |
| bb_putchar(c); |
| } |
| } |
| refresh(FALSE); |
| return 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 ((statbuf.st_mode & S_IFREG) == 0) { |
| // This is not a regular file |
| status_line_bold("\"%s\" Not a regular file", fn); |
| goto fi0; |
| } |
| /* // this check is done by open() |
| if ((statbuf.st_mode & (S_IRUSR | S_IRGRP | S_IROTH)) == 0) { |
| // dont have any read permissions |
| status_line_bold("\"%s\" Not readable", 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); |
| if (p == NULL) |
| goto fi0; |
| 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; |
| fd = open(fn, (O_WRONLY | O_CREAT | O_TRUNC), 0666); |
| if (fd < 0) |
| return -1; |
| cnt = last - first + 1; |
| charcnt = full_write(fd, first, cnt); |
| if (charcnt == cnt) { |
| // good write |
| //file_modified = FALSE; // the file has not been modified |
| } else { |
| charcnt = 0; |
| } |
| close(fd); |
| return charcnt; |
| } |
| |
| //----- Terminal Drawing --------------------------------------- |
| // The terminal is made up of 'rows' line of 'columns' columns. |
| // classically this would be 24 x 80. |
| // screen coordinates |
| // 0,0 ... 0,79 |
| // 1,0 ... 1,79 |
| // . ... . |
| // . ... . |
| // 22,0 ... 22,79 |
| // 23,0 ... 23,79 <- status line |
| |
| //----- Move the cursor to row x col (count from 0, not 1) ------- |
| static void place_cursor(int row, int col, int optimize) |
| { |
| char cm1[sizeof(CMrc) + sizeof(int)*3 * 2]; |
| 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) { |
| 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 |
| 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 |
| } |
| |
| //----- Erase from cursor to end of screen ----------------------- |
| static void clear_to_eos(void) |
| { |
| write1(Ceos); // Erase from cursor to end of screen |
| } |
| |
| //----- Start standout mode ------------------------------------ |
| static void standout_start(void) // send "start reverse video" sequence |
| { |
| write1(SOs); // Start reverse video mode |
| } |
| |
| //----- End standout mode -------------------------------------- |
| static void standout_end(void) // send "end reverse video" sequence |
| { |
| write1(SOn); // End reverse video mode |
| } |
| |
| //----- Flash the screen -------------------------------------- |
| static void flash(int h) |
| { |
| standout_start(); // send "start reverse video" sequence |
| redraw(TRUE); |
| mysleep(h); |
| standout_end(); // send "end reverse video" sequence |
| redraw(TRUE); |
| } |
| |
| static void Indicate_Error(void) |
| { |
| #if ENABLE_FEATURE_VI_CRASHME |
| if (crashme > 0) |
| return; // generate a random command |
| #endif |
| if (!err_method) { |
| write1(bell); // send out a bell character |
| } else { |
| flash(10); |
| } |
| } |
| |
| //----- Screen[] Routines -------------------------------------- |
| //----- Erase the Screen[] memory ------------------------------ |
| static void screen_erase(void) |
| { |
| memset(screen, ' ', screensize); // clear new screen |
| } |
| |
| static int bufsum(char *buf, int count) |
| { |
| int sum = 0; |
| char *e = buf + count; |
| |
| while (buf < e) |
| sum += (unsigned char) *buf++; |
| return sum; |
| } |
| |
| //----- Draw the status line at bottom of the screen ------------- |
| static void show_status_line(void) |
| { |
| int cnt = 0, cksum = 0; |
| |
| // either we already have an error or status message, or we |
| // create one. |
| if (!have_status_msg) { |
| cnt = format_edit_status(); |
| cksum = bufsum(status_buffer, cnt); |
| } |
| if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) { |
| last_status_cksum = cksum; // remember if we have seen this line |
| place_cursor(rows - 1, 0, FALSE); // put cursor on status line |
| write1(status_buffer); |
| clear_to_eol(); |
| if (have_status_msg) { |
| if (((int)strlen(status_buffer) - (have_status_msg - 1)) > |
| (columns - 1) ) { |
| have_status_msg = 0; |
| Hit_Return(); |
| } |
| have_status_msg = 0; |
| } |
| place_cursor(crow, ccol, FALSE); // put cursor back in correct place |
| } |
| fflush(stdout); |
| } |
| |
| //----- format the status buffer, the bottom line of screen ------ |
| // format status buffer, with STANDOUT mode |
| static void 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 int tot; |
| static const char cmd_mode_indicator[] ALIGN1 = "-IR-"; |
| 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 */ |
| } |
| |
| //----- Force refresh of all Lines ----------------------------- |
| static void redraw(int full_screen) |
| { |
| place_cursor(0, 0, FALSE); // put cursor in correct place |
| clear_to_eos(); // tel terminal to erase display |
| screen_erase(); // erase the internal screen buffer |
| last_status_cksum = 0; // force status update |
| refresh(full_screen); // this will redraw the entire display |
| show_status_line(); |
| } |
| |
| //----- Format a text[] line into a buffer --------------------- |
| static 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) |
| { |
| static int old_offset; |
| |
| int li, changed; |
| char *tp, *sp; // pointer into text[] and screen[] |
| |
| if (ENABLE_FEATURE_VI_WIN_RESIZE) { |
| int 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; |
| } |
| |
| //--------------------------------------------------------------------- |
| //----- the Ascii Chart ----------------------------------------------- |
| // |
| // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel |
| // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si |
| // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb |
| // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us |
| // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 ' |
| // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f / |
| // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7 |
| // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ? |
| // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G |
| // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O |
| // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W |
| // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _ |
| // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g |
| // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o |
| // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w |
| // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del |
| //--------------------------------------------------------------------- |
| |
| //----- Execute a Vi Command ----------------------------------- |
| static void do_cmd(char c) |
| { |
| const char *msg = msg; // for compiler |
| char c1, *p, *q, *save_dot; |
| char buf[12]; |
| int dir = dir; // for compiler |
| int cnt, i, j; |
| |
| // 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 VI_K_UP: |
| case VI_K_DOWN: |
| case VI_K_LEFT: |
| case VI_K_RIGHT: |
| case VI_K_HOME: |
| case VI_K_END: |
| case VI_K_PAGEUP: |
| case VI_K_PAGEDOWN: |
| goto key_cmd_mode; |
| } |
| |
| if (cmd_mode == 2) { |
| // flip-flop Insert/Replace mode |
| if (c == VI_K_INSERT) |
| goto dc_i; |
| // we are 'R'eplacing the current *dot with new char |
| if (*dot == '\n') { |
| // don't Replace past E-o-l |
| cmd_mode = 1; // convert to insert |
| } else { |
| if (1 <= c || Isprint(c)) { |
| if (c != 27) |
| dot = yank_delete(dot, dot, 0, YANKDEL); // delete char |
| dot = char_insert(dot, c); // insert new char |
| } |
| goto dc1; |
| } |
| } |
| if (cmd_mode == 1) { |
| // hitting "Insert" twice means "R" replace mode |
| if (c == VI_K_INSERT) goto dc5; |
| // insert the char c at "dot" |
| if (1 <= c || Isprint(c)) { |
| dot = char_insert(dot, c); |
| } |
| goto dc1; |
| } |
| |
| key_cmd_mode: |
| switch (c) { |
| //case 0x01: // soh |
| //case 0x09: // ht |
| //case 0x0b: // vt |
| //case 0x0e: // so |
| //case 0x0f: // si |
| //case 0x10: // dle |
| //case 0x11: // dc1 |
| //case 0x13: // dc3 |
| #if ENABLE_FEATURE_VI_CRASHME |
| case 0x14: // dc4 ctrl-T |
| crashme = (crashme == 0) ? 1 : 0; |
| break; |
| #endif |
| //case 0x16: // syn |
| //case 0x17: // etb |
| //case 0x18: // can |
| //case 0x1c: // fs |
| //case 0x1d: // gs |
| //case 0x1e: // rs |
| //case 0x1f: // us |
| //case '!': // !- |
| //case '#': // #- |
| //case '&': // &- |
| //case '(': // (- |
| //case ')': // )- |
| //case '*': // *- |
| //case '=': // =- |
| //case '@': // @- |
| //case '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 VI_K_PAGEUP: // Cursor Key Page Up |
| dot_scroll(rows - 2, -1); |
| break; |
| #if ENABLE_FEATURE_VI_USE_SIGNALS |
| case 0x03: // ctrl-C interrupt |
| longjmp(restart, 1); |
| break; |
| case 26: // ctrl-Z suspend |
| suspend_sig(SIGTSTP); |
| break; |
| #endif |
| case 4: // ctrl-D scroll down half screen |
| dot_scroll((rows - 2) / 2, 1); |
| break; |
| case 5: // ctrl-E scroll down one line |
| dot_scroll(1, 1); |
| break; |
| case 6: // ctrl-F scroll down full screen |
| case VI_K_PAGEDOWN: // Cursor Key Page Down |
| dot_scroll(rows - 2, 1); |
| break; |
| case 7: // ctrl-G show current status |
| last_status_cksum = 0; // force status update |
| break; |
| case 'h': // h- move left |
| case VI_K_LEFT: // cursor key Left |
| case 8: // ctrl-H- move left (This may be ERASE char) |
| case 0x7f: // DEL- move left (This may be ERASE char) |
| if (cmdcnt-- > 1) { |
| do_cmd(c); |
| } // repeat cnt |
| dot_left(); |
| break; |
| case 10: // Newline ^J |
| case 'j': // j- goto next line, same col |
| case VI_K_DOWN: // cursor key Down |
| if (cmdcnt-- > 1) { |
| do_cmd(c); |
| } // repeat cnt |
| dot_next(); // go to next B-o-l |
| dot = move_to_col(dot, ccol + offset); // try stay in same col |
| break; |
| case 12: // ctrl-L force redraw whole screen |
| case 18: // ctrl-R force redraw |
| place_cursor(0, 0, FALSE); // put cursor in correct place |
| clear_to_eos(); // tel terminal to erase display |
| mysleep(10); |
| screen_erase(); // erase the internal screen buffer |
| last_status_cksum = 0; // force status update |
| refresh(TRUE); // this will redraw the entire display |
| break; |
| case 13: // Carriage Return ^M |
| case '+': // +- goto next line |
| if (cmdcnt-- > 1) { |
| do_cmd(c); |
| } // repeat cnt |
| dot_next(); |
| dot_skip_over_ws(); |
| break; |
| case 21: // ctrl-U scroll up half screen |
| dot_scroll((rows - 2) / 2, -1); |
| break; |
| case 25: // ctrl-Y scroll up one line |
| dot_scroll(1, -1); |
| break; |
| case 27: // esc |
| if (cmd_mode == 0) |
| indicate_error(c); |
| cmd_mode = 0; // stop insrting |
| end_cmd_q(); |
| last_status_cksum = 0; // force status update |
| break; |
| case ' ': // move right |
| case 'l': // move right |
| case VI_K_RIGHT: // Cursor Key Right |
| if (cmdcnt-- > 1) { |
| do_cmd(c); |
| } // repeat cnt |
| dot_right(); |
| break; |
| #if ENABLE_FEATURE_VI_YANKMARK |
| case '"': // "- name a register to use for Delete/Yank |
| c1 = get_one_char(); |
| c1 = tolower(c1); |
| if (islower(c1)) { |
| YDreg = c1 - 'a'; |
| } else { |
| indicate_error(c); |
| } |
| break; |
| case '\'': // '- goto a specific mark |
| c1 = get_one_char(); |
| c1 = tolower(c1); |
| if (islower(c1)) { |
| c1 = c1 - 'a'; |
| // get the b-o-l |
| q = mark[(unsigned char) c1]; |
| if (text <= q && q < end) { |
| dot = q; |
| dot_begin(); // go to B-o-l |
| dot_skip_over_ws(); |
| } |
| } else if (c1 == '\'') { // goto previous context |
| dot = swap_context(dot); // swap current and previous context |
| dot_begin(); // go to B-o-l |
| dot_skip_over_ws(); |
| } else { |
| indicate_error(c); |
| } |
| break; |
| case 'm': // m- Mark a line |
| // this is really stupid. If there are any inserts or deletes |
| // between text[0] and dot then this mark will not point to the |
| // correct location! It could be off by many lines! |
| // Well..., at least its quick and dirty. |
| c1 = get_one_char(); |
| c1 = tolower(c1); |
| if (islower(c1)) { |
| c1 = c1 - 'a'; |
| // remember the line |
| mark[(int) c1] = dot; |
| } else { |
| indicate_error(c); |
| } |
| break; |
| case 'P': // P- Put register before |
| case 'p': // p- put register after |
| p = reg[YDreg]; |
| if (p == 0) { |
| 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 VI_K_END: // Cursor Key End |
| if (cmdcnt-- > 1) { |
| do_cmd(c); |
| } // repeat cnt |
| dot = end_line(dot); |
| break; |
| case '%': // %- find matching char of pair () [] {} |
| for (q = dot; q < end && *q != '\n'; q++) { |
| if (strchr("()[]{}", *q) != NULL) { |
| // we found half of a pair |
| p = find_pair(q, *q); |
| if (p == NULL) { |
| indicate_error(c); |
| } else { |
| dot = p; |
| } |
| break; |
| } |
| } |
| if (*q == '\n') |
| indicate_error(c); |
| break; |
| case 'f': // f- forward to a user specified char |
| last_forward_char = get_one_char(); // get the search char |
| // |
| // dont separate these two commands. 'f' depends on ';' |
| // |
| //**** fall 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 (last_modifying_cmd != NULL && 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: |
| if (last_search_pattern == 0) { |
| msg = "No previous regular expression"; |
| goto dc2; |
| } |
| if (last_search_pattern[0] == '/') { |
| dir = FORWARD; // assume FORWARD search |
| p = dot + 1; |
| } |
| if (last_search_pattern[0] == '?') { |
| dir = BACK; |
| p = dot - 1; |
| } |
| dc4: |
| q = char_search(p, last_search_pattern + 1, dir, FULL); |
| if (q != NULL) { |
| dot = q; // good search, update "dot" |
| msg = ""; |
| goto dc2; |
| } |
| // no pattern found between "dot" and "end"- continue at top |
| p = text; |
| if (dir == BACK) { |
| p = end - 1; |
| } |
| q = char_search(p, last_search_pattern + 1, dir, FULL); |
| if (q != NULL) { // found something |
| dot = q; // found new pattern- goto it |
| msg = "search hit BOTTOM, continuing at TOP"; |
| if (dir == BACK) { |
| msg = "search hit TOP, continuing at BOTTOM"; |
| } |
| } else { |
| msg = "Pattern not found"; |
| } |
| dc2: |
| if (*msg) |
| 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 (from vim) |
| // (default to first line in file) |
| c1 = get_one_char(); |
| if (c1 != 'g') { |
| buf[0] = 'g'; |
| buf[1] = c1; |
| 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 VI_K_INSERT: // Cursor Key Insert |
| dc_i: |
| cmd_mode = 1; // start insrting |
| break; |
| case 'J': // J- join current and next lines together |
| if (cmdcnt-- > 2) { |
| do_cmd(c); |
| } // repeat cnt |
| dot_end(); // move to NL |
| if (dot < end - 1) { // make sure not last char in text[] |
| *dot++ = ' '; // replace NL with space |
| file_modified++; |
| while (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 VI_K_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 VI_K_UP: // cursor key Up |
| if (cmdcnt-- > 1) { |
| do_cmd(c); |
| } // repeat cnt |
| dot_prev(); |
| dot = move_to_col(dot, ccol + offset); // try stay in same col |
| break; |
| case 'r': // r- replace the current char with user input |
| c1 = get_one_char(); // get the replacement char |
| if (*dot != '\n') { |
| *dot = c1; |
| file_modified++; // has the file been modified |
| } |
| end_cmd_q(); // stop adding to q |
| break; |
| case 't': // t- move to char prior to next x |
| last_forward_char = get_one_char(); |
| do_cmd(';'); |
| if (*dot == last_forward_char) |
| dot_left(); |
| last_forward_char= 0; |
| break; |
| case 'w': // w- forward a word |
| if (cmdcnt-- > 1) { |
| do_cmd(c); |
| } // repeat cnt |
| if (isalnum(*dot) || *dot == '_') { // we are on ALNUM |
| dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM); |
| } else if (ispunct(*dot)) { // we are on PUNCT |
| dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT); |
| } |
| if (dot < end - 1) |
| dot++; // move over word |
| if (isspace(*dot)) { |
| dot = skip_thing(dot, 2, FORWARD, S_OVER_WS); |
| } |
| break; |
| case 'z': // z- |
| c1 = get_one_char(); // get the replacement char |
| cnt = 0; |
| if (c1 == '.') |
| cnt = (rows - 2) / 2; // put dot at center |
| if (c1 == '-') |
| cnt = rows - 2; // put dot at bottom |
| screenbegin = begin_line(dot); // start dot at top |
| dot_scroll(cnt, -1); |
| break; |
| case '|': // |- move to column "cmdcnt" |
| dot = move_to_col(dot, cmdcnt - 1); // try to move to column |
| break; |
| case '~': // ~- flip the case of letters a-z -> A-Z |
| if (cmdcnt-- > 1) { |
| do_cmd(c); |
| } // repeat cnt |
| if (islower(*dot)) { |
| *dot = toupper(*dot); |
| file_modified++; // has the file been modified |
| } else if (isupper(*dot)) { |
| *dot = tolower(*dot); |
| file_modified++; // has the file been modified |
| } |
| dot_right(); |
| end_cmd_q(); // stop adding to q |
| break; |
| //----- The Cursor and Function Keys ----------------------------- |
| case VI_K_HOME: // Cursor Key Home |
| dot_begin(); |
| break; |
| // The Fn keys could point to do_macro which could translate them |
| case VI_K_FUN1: // Function Key F1 |
| case VI_K_FUN2: // Function Key F2 |
| case VI_K_FUN3: // Function Key F3 |
| case VI_K_FUN4: // Function Key F4 |
| case VI_K_FUN5: // Function Key F5 |
| case VI_K_FUN6: // Function Key F6 |
| case VI_K_FUN7: // Function Key F7 |
| case VI_K_FUN8: // Function Key F8 |
| case VI_K_FUN9: // Function Key F9 |
| case VI_K_FUN10: // Function Key F10 |
| case VI_K_FUN11: // Function Key F11 |
| case VI_K_FUN12: // Function Key F12 |
| break; |
| } |
| |
| dc1: |
| // if text[] just became empty, add back an empty line |
| if (end == text) { |
| char_insert(text, '\n'); // start empty buf with dummy line |
| dot = text; |
| } |
| // it is OK for dot to exactly equal to end, otherwise check dot validity |
| if (dot != end) { |
| dot = bound_dot(dot); // make sure "dot" is valid |
| } |
| #if ENABLE_FEATURE_VI_YANKMARK |
| check_context(c); // update the current context |
| #endif |
| |
| if (!isdigit(c)) |
| cmdcnt = 0; // cmd was not a number, reset cmdcnt |
| cnt = dot - begin_line(dot); |
| // Try to stay off of the Newline |
| if (*dot == '\n' && cnt > 0 && cmd_mode == 0) |
| dot--; |
| } |
| |
| /* 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]) { |
| alarm(0); |
| printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s", |
| totalcmds, last_input_char, msg, SOs, SOn); |
| fflush(stdout); |
| while (safe_read(0, d, 1) > 0) { |
| if (d[0] == '\n' || d[0] == '\r') |
| break; |
| } |
| alarm(3); |
| } |
| 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 |