| /* vi: set sw=4 ts=4: */ |
| /* |
| * tiny vi.c: A small 'vi' clone |
| * Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com> |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| */ |
| // |
| //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 |
| // An "ex" line oriented mode- maybe using "cmdedit" |
| |
| //config:config VI |
| //config: bool "vi (23 kb)" |
| //config: default y |
| //config: help |
| //config: 'vi' is a text editor. More specifically, it is the One True |
| //config: text editor <grin>. It does, however, have a rather steep |
| //config: learning curve. If you are not already comfortable with 'vi' |
| //config: you may wish to use something else. |
| //config: |
| //config:config FEATURE_VI_MAX_LEN |
| //config: int "Maximum screen width" |
| //config: range 256 16384 |
| //config: default 4096 |
| //config: depends on VI |
| //config: help |
| //config: Contrary to what you may think, this is not eating much. |
| //config: Make it smaller than 4k only if you are very limited on memory. |
| //config: |
| //config:config FEATURE_VI_8BIT |
| //config: bool "Allow to display 8-bit chars (otherwise shows dots)" |
| //config: default n |
| //config: depends on VI |
| //config: help |
| //config: If your terminal can display characters with high bit set, |
| //config: you may want to enable this. Note: vi is not Unicode-capable. |
| //config: If your terminal combines several 8-bit bytes into one character |
| //config: (as in Unicode mode), this will not work properly. |
| //config: |
| //config:config FEATURE_VI_COLON |
| //config: bool "Enable \":\" colon commands (no \"ex\" mode)" |
| //config: default y |
| //config: depends on VI |
| //config: help |
| //config: Enable a limited set of colon commands. This does not |
| //config: provide an "ex" mode. |
| //config: |
| //config:config FEATURE_VI_YANKMARK |
| //config: bool "Enable yank/put commands and mark cmds" |
| //config: default y |
| //config: depends on VI |
| //config: help |
| //config: This enables you to use yank and put, as well as mark. |
| //config: |
| //config:config FEATURE_VI_SEARCH |
| //config: bool "Enable search and replace cmds" |
| //config: default y |
| //config: depends on VI |
| //config: help |
| //config: Select this if you wish to be able to do search and replace. |
| //config: |
| //config:config FEATURE_VI_REGEX_SEARCH |
| //config: bool "Enable regex in search and replace" |
| //config: default n # Uses GNU regex, which may be unavailable. FIXME |
| //config: depends on FEATURE_VI_SEARCH |
| //config: help |
| //config: Use extended regex search. |
| //config: |
| //config:config FEATURE_VI_USE_SIGNALS |
| //config: bool "Catch signals" |
| //config: default y |
| //config: depends on VI |
| //config: help |
| //config: Selecting this option will make vi signal aware. This will support |
| //config: SIGWINCH to deal with Window Changes, catch ^Z and ^C and alarms. |
| //config: |
| //config:config FEATURE_VI_DOT_CMD |
| //config: bool "Remember previous cmd and \".\" cmd" |
| //config: default y |
| //config: depends on VI |
| //config: help |
| //config: Make vi remember the last command and be able to repeat it. |
| //config: |
| //config:config FEATURE_VI_READONLY |
| //config: bool "Enable -R option and \"view\" mode" |
| //config: default y |
| //config: depends on VI |
| //config: help |
| //config: Enable the read-only command line option, which allows the user to |
| //config: open a file in read-only mode. |
| //config: |
| //config:config FEATURE_VI_SETOPTS |
| //config: bool "Enable settable options, ai ic showmatch" |
| //config: default y |
| //config: depends on VI |
| //config: help |
| //config: Enable the editor to set some (ai, ic, showmatch) options. |
| //config: |
| //config:config FEATURE_VI_SET |
| //config: bool "Support :set" |
| //config: default y |
| //config: depends on VI |
| //config: |
| //config:config FEATURE_VI_WIN_RESIZE |
| //config: bool "Handle window resize" |
| //config: default y |
| //config: depends on VI |
| //config: help |
| //config: Behave nicely with terminals that get resized. |
| //config: |
| //config:config FEATURE_VI_ASK_TERMINAL |
| //config: bool "Use 'tell me cursor position' ESC sequence to measure window" |
| //config: default y |
| //config: depends on VI |
| //config: help |
| //config: If terminal size can't be retrieved and $LINES/$COLUMNS are not set, |
| //config: this option makes vi perform a last-ditch effort to find it: |
| //config: position cursor to 999,999 and ask terminal to report real |
| //config: cursor position using "ESC [ 6 n" escape sequence, then read stdin. |
| //config: This is not clean but helps a lot on serial lines and such. |
| //config: |
| //config:config FEATURE_VI_UNDO |
| //config: bool "Support undo command \"u\"" |
| //config: default y |
| //config: depends on VI |
| //config: help |
| //config: Support the 'u' command to undo insertion, deletion, and replacement |
| //config: of text. |
| //config: |
| //config:config FEATURE_VI_UNDO_QUEUE |
| //config: bool "Enable undo operation queuing" |
| //config: default y |
| //config: depends on FEATURE_VI_UNDO |
| //config: help |
| //config: The vi undo functions can use an intermediate queue to greatly lower |
| //config: malloc() calls and overhead. When the maximum size of this queue is |
| //config: reached, the contents of the queue are committed to the undo stack. |
| //config: This increases the size of the undo code and allows some undo |
| //config: operations (especially un-typing/backspacing) to be far more useful. |
| //config: |
| //config:config FEATURE_VI_UNDO_QUEUE_MAX |
| //config: int "Maximum undo character queue size" |
| //config: default 256 |
| //config: range 32 65536 |
| //config: depends on FEATURE_VI_UNDO_QUEUE |
| //config: help |
| //config: This option sets the number of bytes used at runtime for the queue. |
| //config: Smaller values will create more undo objects and reduce the amount |
| //config: of typed or backspaced characters that are grouped into one undo |
| //config: operation; larger values increase the potential size of each undo |
| //config: and will generally malloc() larger objects and less frequently. |
| //config: Unless you want more (or less) frequent "undo points" while typing, |
| //config: you should probably leave this unchanged. |
| |
| //applet:IF_VI(APPLET(vi, BB_DIR_BIN, BB_SUID_DROP)) |
| |
| //kbuild:lib-$(CONFIG_VI) += vi.o |
| |
| //usage:#define vi_trivial_usage |
| //usage: "[OPTIONS] [FILE]..." |
| //usage:#define vi_full_usage "\n\n" |
| //usage: "Edit FILE\n" |
| //usage: IF_FEATURE_VI_COLON( |
| //usage: "\n -c CMD Initial command to run ($EXINIT also available)" |
| //usage: ) |
| //usage: IF_FEATURE_VI_READONLY( |
| //usage: "\n -R Read-only" |
| //usage: ) |
| //usage: "\n -H List available features" |
| |
| #include "libbb.h" |
| // Should be after libbb.h: on some systems regex.h needs sys/types.h: |
| #if ENABLE_FEATURE_VI_REGEX_SEARCH |
| # include <regex.h> |
| #endif |
| |
| // 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 |
| //FIXME: this does not work properly for Unicode anyway |
| # define Isprint(c) (isprint)(c) |
| #else |
| # define Isprint(c) isprint_asciionly(c) |
| #endif |
| |
| #else |
| |
| // 0x9b is Meta-ESC |
| #if ENABLE_FEATURE_VI_8BIT |
| # define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b) |
| #else |
| # define Isprint(c) ((unsigned char)(c) >= ' ' && (unsigned char)(c) < 0x7f) |
| #endif |
| |
| #endif |
| |
| |
| enum { |
| MAX_TABSTOP = 32, // sanity limit |
| // User input len. Need not be extra big. |
| // Lines in file being edited *can* be bigger than this. |
| MAX_INPUT_LEN = 128, |
| // Sanity limits. We have only one buffer of this size. |
| MAX_SCR_COLS = CONFIG_FEATURE_VI_MAX_LEN, |
| MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN, |
| }; |
| |
| // VT102 ESC sequences. |
| // See "Xterm Control Sequences" |
| // http://invisible-island.net/xterm/ctlseqs/ctlseqs.html |
| #define ESC "\033" |
| // Inverse/Normal text |
| #define ESC_BOLD_TEXT ESC"[7m" |
| #define ESC_NORM_TEXT ESC"[m" |
| // Bell |
| #define ESC_BELL "\007" |
| // Clear-to-end-of-line |
| #define ESC_CLEAR2EOL ESC"[K" |
| // Clear-to-end-of-screen. |
| // (We use default param here. |
| // Full sequence is "ESC [ <num> J", |
| // <num> is 0/1/2 = "erase below/above/all".) |
| #define ESC_CLEAR2EOS ESC"[J" |
| // Cursor to given coordinate (1,1: top left) |
| #define ESC_SET_CURSOR_POS ESC"[%u;%uH" |
| #define ESC_SET_CURSOR_TOPLEFT ESC"[H" |
| //UNUSED |
| //// Cursor up and down |
| //#define ESC_CURSOR_UP ESC"[A" |
| //#define ESC_CURSOR_DOWN "\n" |
| |
| #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK |
| // cmds modifying text[] |
| static const char modifying_cmds[] ALIGN1 = "aAcCdDiIJoOpPrRs""xX<>~"; |
| #endif |
| |
| enum { |
| YANKONLY = FALSE, |
| YANKDEL = TRUE, |
| FORWARD = 1, // code depends on "1" for array index |
| BACK = -1, // code depends on "-1" for array index |
| LIMITED = 0, // char_search() only current line |
| FULL = 1, // char_search() to the end/beginning of entire text |
| |
| S_BEFORE_WS = 1, // used in skip_thing() for moving "dot" |
| S_TO_WS = 2, // used in skip_thing() for moving "dot" |
| S_OVER_WS = 3, // used in skip_thing() for moving "dot" |
| S_END_PUNCT = 4, // used in skip_thing() for moving "dot" |
| S_END_ALNUM = 5, // used in skip_thing() for moving "dot" |
| }; |
| |
| |
| // vi.c expects chars to be unsigned. |
| // busybox build system provides that, but it's better |
| // to audit and fix the source |
| |
| struct globals { |
| // many references - keep near the top of globals |
| char *text, *end; // pointers to the user data in memory |
| char *dot; // where all the action takes place |
| int text_size; // size of the allocated buffer |
| |
| // the rest |
| smallint vi_setops; |
| #define VI_AUTOINDENT 1 |
| #define VI_SHOWMATCH 2 |
| #define VI_IGNORECASE 4 |
| #define VI_ERR_METHOD 8 |
| #define autoindent (vi_setops & VI_AUTOINDENT) |
| #define showmatch (vi_setops & VI_SHOWMATCH ) |
| #define ignorecase (vi_setops & VI_IGNORECASE) |
| // indicate error with beep or flash |
| #define err_method (vi_setops & VI_ERR_METHOD) |
| |
| #if ENABLE_FEATURE_VI_READONLY |
| smallint readonly_mode; |
| #define SET_READONLY_FILE(flags) ((flags) |= 0x01) |
| #define SET_READONLY_MODE(flags) ((flags) |= 0x02) |
| #define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe) |
| #else |
| #define SET_READONLY_FILE(flags) ((void)0) |
| #define SET_READONLY_MODE(flags) ((void)0) |
| #define UNSET_READONLY_FILE(flags) ((void)0) |
| #endif |
| |
| smallint editing; // >0 while we are editing a file |
| // [code audit says "can be 0, 1 or 2 only"] |
| smallint cmd_mode; // 0=command 1=insert 2=replace |
| int modified_count; // buffer contents changed if !0 |
| int last_modified_count; // = -1; |
| int cmdline_filecnt; // how many file names on cmd line |
| int cmdcnt; // repetition count |
| unsigned rows, columns; // the terminal screen is this size |
| #if ENABLE_FEATURE_VI_ASK_TERMINAL |
| int get_rowcol_error; |
| #endif |
| int crow, ccol; // cursor is on Crow x Ccol |
| int offset; // chars scrolled off the screen to the left |
| int have_status_msg; // is default edit status needed? |
| // [don't make smallint!] |
| int last_status_cksum; // hash of current status line |
| char *current_filename; |
| char *screenbegin; // index into text[], of top line on the screen |
| char *screen; // pointer to the virtual screen buffer |
| int screensize; // and its size |
| int tabstop; |
| int last_forward_char; // last char searched for with 'f' (int because of Unicode) |
| #if ENABLE_FEATURE_VI_CRASHME |
| char last_input_char; // last char read from user |
| #endif |
| |
| #if ENABLE_FEATURE_VI_DOT_CMD |
| smallint adding2q; // are we currently adding user input to q |
| int lmc_len; // length of last_modifying_cmd |
| char *ioq, *ioq_start; // pointer to string for get_one_char to "read" |
| #endif |
| #if ENABLE_FEATURE_VI_SEARCH |
| char *last_search_pattern; // last pattern from a '/' or '?' search |
| #endif |
| |
| // former statics |
| #if ENABLE_FEATURE_VI_YANKMARK |
| char *edit_file__cur_line; |
| #endif |
| int refresh__old_offset; |
| int format_edit_status__tot; |
| |
| // a few references only |
| #if ENABLE_FEATURE_VI_YANKMARK |
| smalluint YDreg;//,Ureg;// default delete register and orig line for "U" |
| #define Ureg 27 |
| char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27 |
| char *mark[28]; // user marks points somewhere in text[]- a-z and previous context '' |
| char *context_start, *context_end; |
| #endif |
| #if ENABLE_FEATURE_VI_USE_SIGNALS |
| sigjmp_buf restart; // int_handler() jumps to location remembered here |
| #endif |
| struct termios term_orig; // remember what the cooked mode was |
| #if ENABLE_FEATURE_VI_COLON |
| char *initial_cmds[3]; // currently 2 entries, NULL terminated |
| #endif |
| // Should be just enough to hold a key sequence, |
| // but CRASHME mode uses it as generated command buffer too |
| #if ENABLE_FEATURE_VI_CRASHME |
| char readbuffer[128]; |
| #else |
| char readbuffer[KEYCODE_BUFFER_SIZE]; |
| #endif |
| #define STATUS_BUFFER_LEN 200 |
| char status_buffer[STATUS_BUFFER_LEN]; // messages to the user |
| #if ENABLE_FEATURE_VI_DOT_CMD |
| char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "." |
| #endif |
| char get_input_line__buf[MAX_INPUT_LEN]; // former static |
| |
| char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2]; |
| |
| #if ENABLE_FEATURE_VI_UNDO |
| // undo_push() operations |
| #define UNDO_INS 0 |
| #define UNDO_DEL 1 |
| #define UNDO_INS_CHAIN 2 |
| #define UNDO_DEL_CHAIN 3 |
| // UNDO_*_QUEUED must be equal to UNDO_xxx ORed with UNDO_QUEUED_FLAG |
| #define UNDO_QUEUED_FLAG 4 |
| #define UNDO_INS_QUEUED 4 |
| #define UNDO_DEL_QUEUED 5 |
| #define UNDO_USE_SPOS 32 |
| #define UNDO_EMPTY 64 |
| // Pass-through flags for functions that can be undone |
| #define NO_UNDO 0 |
| #define ALLOW_UNDO 1 |
| #define ALLOW_UNDO_CHAIN 2 |
| # if ENABLE_FEATURE_VI_UNDO_QUEUE |
| #define ALLOW_UNDO_QUEUED 3 |
| char undo_queue_state; |
| int undo_q; |
| char *undo_queue_spos; // Start position of queued operation |
| char undo_queue[CONFIG_FEATURE_VI_UNDO_QUEUE_MAX]; |
| # else |
| // If undo queuing disabled, don't invoke the missing queue logic |
| #define ALLOW_UNDO_QUEUED 1 |
| # endif |
| struct undo_object { |
| struct undo_object *prev; // Linking back avoids list traversal (LIFO) |
| int start; // Offset where the data should be restored/deleted |
| int length; // total data size |
| uint8_t u_type; // 0=deleted, 1=inserted, 2=swapped |
| char undo_text[1]; // text that was deleted (if deletion) |
| } *undo_stack_tail; |
| #endif /* ENABLE_FEATURE_VI_UNDO */ |
| }; |
| #define G (*ptr_to_globals) |
| #define text (G.text ) |
| #define text_size (G.text_size ) |
| #define end (G.end ) |
| #define dot (G.dot ) |
| #define reg (G.reg ) |
| |
| #define vi_setops (G.vi_setops ) |
| #define editing (G.editing ) |
| #define cmd_mode (G.cmd_mode ) |
| #define modified_count (G.modified_count ) |
| #define last_modified_count (G.last_modified_count) |
| #define cmdline_filecnt (G.cmdline_filecnt ) |
| #define cmdcnt (G.cmdcnt ) |
| #define rows (G.rows ) |
| #define columns (G.columns ) |
| #define crow (G.crow ) |
| #define ccol (G.ccol ) |
| #define offset (G.offset ) |
| #define status_buffer (G.status_buffer ) |
| #define have_status_msg (G.have_status_msg ) |
| #define last_status_cksum (G.last_status_cksum ) |
| #define current_filename (G.current_filename ) |
| #define screen (G.screen ) |
| #define screensize (G.screensize ) |
| #define screenbegin (G.screenbegin ) |
| #define tabstop (G.tabstop ) |
| #define last_forward_char (G.last_forward_char ) |
| #if ENABLE_FEATURE_VI_CRASHME |
| #define last_input_char (G.last_input_char ) |
| #endif |
| #if ENABLE_FEATURE_VI_READONLY |
| #define readonly_mode (G.readonly_mode ) |
| #else |
| #define readonly_mode 0 |
| #endif |
| #define adding2q (G.adding2q ) |
| #define lmc_len (G.lmc_len ) |
| #define ioq (G.ioq ) |
| #define ioq_start (G.ioq_start ) |
| #define last_search_pattern (G.last_search_pattern) |
| |
| #define edit_file__cur_line (G.edit_file__cur_line) |
| #define refresh__old_offset (G.refresh__old_offset) |
| #define format_edit_status__tot (G.format_edit_status__tot) |
| |
| #define YDreg (G.YDreg ) |
| //#define Ureg (G.Ureg ) |
| #define mark (G.mark ) |
| #define context_start (G.context_start ) |
| #define context_end (G.context_end ) |
| #define restart (G.restart ) |
| #define term_orig (G.term_orig ) |
| #define initial_cmds (G.initial_cmds ) |
| #define readbuffer (G.readbuffer ) |
| #define scr_out_buf (G.scr_out_buf ) |
| #define last_modifying_cmd (G.last_modifying_cmd ) |
| #define get_input_line__buf (G.get_input_line__buf) |
| |
| #if ENABLE_FEATURE_VI_UNDO |
| #define undo_stack_tail (G.undo_stack_tail ) |
| # if ENABLE_FEATURE_VI_UNDO_QUEUE |
| #define undo_queue_state (G.undo_queue_state) |
| #define undo_q (G.undo_q ) |
| #define undo_queue (G.undo_queue ) |
| #define undo_queue_spos (G.undo_queue_spos ) |
| # endif |
| #endif |
| |
| #define INIT_G() do { \ |
| SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ |
| last_modified_count = -1; \ |
| /* "" but has space for 2 chars: */ \ |
| IF_FEATURE_VI_SEARCH(last_search_pattern = xzalloc(2);) \ |
| } while (0) |
| |
| #if ENABLE_FEATURE_VI_CRASHME |
| static int crashme = 0; |
| #endif |
| |
| static void show_status_line(void); // put a message on the bottom line |
| static void status_line_bold(const char *, ...); |
| |
| 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 |
| //not implemented: "\n\tReadonly if vi is called as \"view\"" |
| //redundant: usage text says this too: "\n\tReadonly with -R command line arg" |
| #endif |
| #if ENABLE_FEATURE_VI_SET |
| "\n\tSome colon mode commands with :" |
| #endif |
| #if ENABLE_FEATURE_VI_SETOPTS |
| "\n\tSettable options with \":set\"" |
| #endif |
| #if ENABLE_FEATURE_VI_USE_SIGNALS |
| "\n\tSignal catching- ^C" |
| "\n\tJob suspend and resume with ^Z" |
| #endif |
| #if ENABLE_FEATURE_VI_WIN_RESIZE |
| "\n\tAdapt to window re-sizes" |
| #endif |
| ); |
| } |
| |
| static void write1(const char *out) |
| { |
| fputs(out, stdout); |
| } |
| |
| #if ENABLE_FEATURE_VI_WIN_RESIZE |
| static int query_screen_dimensions(void) |
| { |
| int err = get_terminal_width_height(STDIN_FILENO, &columns, &rows); |
| if (rows > MAX_SCR_ROWS) |
| rows = MAX_SCR_ROWS; |
| if (columns > MAX_SCR_COLS) |
| columns = MAX_SCR_COLS; |
| return err; |
| } |
| #else |
| static ALWAYS_INLINE int query_screen_dimensions(void) |
| { |
| return 0; |
| } |
| #endif |
| |
| // sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready) |
| static int mysleep(int hund) |
| { |
| struct pollfd pfd[1]; |
| |
| if (hund != 0) |
| fflush_all(); |
| |
| pfd[0].fd = STDIN_FILENO; |
| pfd[0].events = POLLIN; |
| return safe_poll(pfd, 1, hund*10) > 0; |
| } |
| |
| //----- Set terminal attributes -------------------------------- |
| static void rawmode(void) |
| { |
| // no TERMIOS_CLEAR_ISIG: leave ISIG on - allow signals |
| set_termios_to_raw(STDIN_FILENO, &term_orig, TERMIOS_RAW_CRNL); |
| } |
| |
| static void cookmode(void) |
| { |
| fflush_all(); |
| tcsetattr_stdin_TCSANOW(&term_orig); |
| } |
| |
| //----- 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) |
| { |
| char cm1[sizeof(ESC_SET_CURSOR_POS) + sizeof(int)*3 * 2]; |
| |
| if (row < 0) row = 0; |
| if (row >= rows) row = rows - 1; |
| if (col < 0) col = 0; |
| if (col >= columns) col = columns - 1; |
| |
| sprintf(cm1, ESC_SET_CURSOR_POS, row + 1, col + 1); |
| write1(cm1); |
| } |
| |
| //----- Erase from cursor to end of line ----------------------- |
| static void clear_to_eol(void) |
| { |
| write1(ESC_CLEAR2EOL); |
| } |
| |
| static void go_bottom_and_clear_to_eol(void) |
| { |
| place_cursor(rows - 1, 0); |
| clear_to_eol(); |
| } |
| |
| //----- Start standout mode ------------------------------------ |
| static void standout_start(void) |
| { |
| write1(ESC_BOLD_TEXT); |
| } |
| |
| //----- End standout mode -------------------------------------- |
| static void standout_end(void) |
| { |
| write1(ESC_NORM_TEXT); |
| } |
| |
| //----- Text Movement Routines --------------------------------- |
| static char *begin_line(char *p) // return pointer to first char cur line |
| { |
| if (p > text) { |
| p = memrchr(text, '\n', p - text); |
| if (!p) |
| return text; |
| return p + 1; |
| } |
| return p; |
| } |
| |
| static char *end_line(char *p) // return pointer to NL of cur line |
| { |
| if (p < end - 1) { |
| p = memchr(p, '\n', end - p - 1); |
| if (!p) |
| return end - 1; |
| } |
| return p; |
| } |
| |
| static char *dollar_line(char *p) // return pointer to just before NL line |
| { |
| p = end_line(p); |
| // Try to stay off of the Newline |
| if (*p == '\n' && (p - begin_line(p)) > 0) |
| p--; |
| return p; |
| } |
| |
| static char *prev_line(char *p) // return pointer first char prev line |
| { |
| p = begin_line(p); // goto beginning of cur line |
| if (p > text && p[-1] == '\n') |
| p--; // step to prev line |
| p = begin_line(p); // goto beginning of prev line |
| return p; |
| } |
| |
| static char *next_line(char *p) // return pointer first char next line |
| { |
| p = end_line(p); |
| if (p < end - 1 && *p == '\n') |
| p++; // step to next line |
| return p; |
| } |
| |
| //----- Text Information Routines ------------------------------ |
| static char *end_screen(void) |
| { |
| char *q; |
| int cnt; |
| |
| // find new bottom line |
| q = screenbegin; |
| for (cnt = 0; cnt < rows - 2; cnt++) |
| q = next_line(q); |
| q = end_line(q); |
| return q; |
| } |
| |
| // count line from start to stop |
| static int count_lines(char *start, char *stop) |
| { |
| char *q; |
| int cnt; |
| |
| if (stop < start) { // start and stop are backwards- reverse them |
| q = start; |
| start = stop; |
| stop = q; |
| } |
| cnt = 0; |
| stop = end_line(stop); |
| while (start <= stop && start <= end - 1) { |
| start = end_line(start); |
| if (*start == '\n') |
| cnt++; |
| start++; |
| } |
| return cnt; |
| } |
| |
| static char *find_line(int li) // find beginning of line #li |
| { |
| char *q; |
| |
| for (q = text; li > 1; li--) { |
| q = next_line(q); |
| } |
| return q; |
| } |
| |
| static int next_tabstop(int col) |
| { |
| return col + ((tabstop - 1) - (col % tabstop)); |
| } |
| |
| //----- Erase the Screen[] memory ------------------------------ |
| static void screen_erase(void) |
| { |
| memset(screen, ' ', screensize); // clear new screen |
| } |
| |
| static void new_screen(int ro, int co) |
| { |
| char *s; |
| |
| free(screen); |
| screensize = ro * co + 8; |
| s = screen = xmalloc(screensize); |
| // initialize the new screen. assume this will be a empty file. |
| screen_erase(); |
| // non-existent text[] lines start with a tilde (~). |
| //screen[(1 * co) + 0] = '~'; |
| //screen[(2 * co) + 0] = '~'; |
| //.. |
| //screen[((ro-2) * co) + 0] = '~'; |
| ro -= 2; |
| while (--ro >= 0) { |
| s += co; |
| *s = '~'; |
| } |
| } |
| |
| //----- Synchronize the cursor to Dot -------------------------- |
| static NOINLINE void sync_cursor(char *d, int *row, int *col) |
| { |
| char *beg_cur; // begin and end of "d" line |
| char *tp; |
| int cnt, ro, co; |
| |
| beg_cur = begin_line(d); // first char of cur line |
| |
| if (beg_cur < screenbegin) { |
| // "d" is before top line on screen |
| // how many lines do we have to move |
| cnt = count_lines(beg_cur, screenbegin); |
| sc1: |
| screenbegin = beg_cur; |
| if (cnt > (rows - 1) / 2) { |
| // we moved too many lines. put "dot" in middle of screen |
| for (cnt = 0; cnt < (rows - 1) / 2; cnt++) { |
| screenbegin = prev_line(screenbegin); |
| } |
| } |
| } else { |
| char *end_scr; // begin and end of screen |
| end_scr = end_screen(); // last char of screen |
| if (beg_cur > end_scr) { |
| // "d" is after bottom line on screen |
| // how many lines do we have to move |
| cnt = count_lines(end_scr, beg_cur); |
| if (cnt > (rows - 1) / 2) |
| goto sc1; // too many lines |
| for (ro = 0; ro < cnt - 1; ro++) { |
| // move screen begin the same amount |
| screenbegin = next_line(screenbegin); |
| // now, move the end of screen |
| end_scr = next_line(end_scr); |
| end_scr = end_line(end_scr); |
| } |
| } |
| } |
| // "d" is on screen- find out which row |
| tp = screenbegin; |
| for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row |
| if (tp == beg_cur) |
| break; |
| tp = next_line(tp); |
| } |
| |
| // find out what col "d" is on |
| co = 0; |
| while (tp < d) { // drive "co" to correct column |
| if (*tp == '\n') //vda || *tp == '\0') |
| break; |
| if (*tp == '\t') { |
| // handle tabs like real vi |
| if (d == tp && cmd_mode) { |
| break; |
| } |
| co = next_tabstop(co); |
| } else if ((unsigned char)*tp < ' ' || *tp == 0x7f) { |
| co++; // display as ^X, use 2 columns |
| } |
| co++; |
| tp++; |
| } |
| |
| // "co" is the column where "dot" is. |
| // The screen has "columns" columns. |
| // The currently displayed columns are 0+offset -- columns+ofset |
| // |-------------------------------------------------------------| |
| // ^ ^ ^ |
| // offset | |------- columns ----------------| |
| // |
| // If "co" is already in this range then we do not have to adjust offset |
| // but, we do have to subtract the "offset" bias from "co". |
| // If "co" is outside this range then we have to change "offset". |
| // If the first char of a line is a tab the cursor will try to stay |
| // in column 7, but we have to set offset to 0. |
| |
| if (co < 0 + offset) { |
| offset = co; |
| } |
| if (co >= columns + offset) { |
| offset = co - columns + 1; |
| } |
| // if the first char of the line is a tab, and "dot" is sitting on it |
| // force offset to 0. |
| if (d == beg_cur && *d == '\t') { |
| offset = 0; |
| } |
| co -= offset; |
| |
| *row = ro; |
| *col = co; |
| } |
| |
| //----- Format a text[] line into a buffer --------------------- |
| static char* format_line(char *src /*, int li*/) |
| { |
| unsigned char c; |
| int co; |
| int ofs = offset; |
| char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2] |
| |
| c = '~'; // char in col 0 in non-existent lines is '~' |
| co = 0; |
| while (co < columns + tabstop) { |
| // have we gone past the end? |
| if (src < end) { |
| c = *src++; |
| if (c == '\n') |
| break; |
| if ((c & 0x80) && !Isprint(c)) { |
| c = '.'; |
| } |
| if (c < ' ' || c == 0x7f) { |
| if (c == '\t') { |
| c = ' '; |
| // co % 8 != 7 |
| while ((co % tabstop) != (tabstop - 1)) { |
| dest[co++] = c; |
| } |
| } else { |
| dest[co++] = '^'; |
| if (c == 0x7f) |
| c = '?'; |
| else |
| c += '@'; // Ctrl-X -> 'X' |
| } |
| } |
| } |
| dest[co++] = c; |
| // discard scrolled-off-to-the-left portion, |
| // in tabstop-sized pieces |
| if (ofs >= tabstop && co >= tabstop) { |
| memmove(dest, dest + tabstop, co); |
| co -= tabstop; |
| ofs -= tabstop; |
| } |
| if (src >= end) |
| break; |
| } |
| // check "short line, gigantic offset" case |
| if (co < ofs) |
| ofs = co; |
| // discard last scrolled off part |
| co -= ofs; |
| dest += ofs; |
| // fill the rest with spaces |
| if (co < columns) |
| memset(&dest[co], ' ', columns - co); |
| return dest; |
| } |
| |
| //----- Refresh the changed screen lines ----------------------- |
| // Copy the source line from text[] into the buffer and note |
| // if the current screenline is different from the new buffer. |
| // If they differ then that line needs redrawing on the terminal. |
| // |
| static void refresh(int full_screen) |
| { |
| #define old_offset refresh__old_offset |
| |
| int li, changed; |
| char *tp, *sp; // pointer into text[] and screen[] |
| |
| if (ENABLE_FEATURE_VI_WIN_RESIZE IF_FEATURE_VI_ASK_TERMINAL(&& !G.get_rowcol_error) ) { |
| unsigned c = columns, r = rows; |
| query_screen_dimensions(); |
| #if ENABLE_FEATURE_VI_USE_SIGNALS |
| full_screen |= (c - columns) | (r - rows); |
| #else |
| if (c != columns || r != rows) { |
| full_screen = TRUE; |
| // update screen memory since SIGWINCH won't have done it |
| new_screen(rows, columns); |
| } |
| #endif |
| } |
| sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot") |
| tp = screenbegin; // index into text[] of top line |
| |
| // compare text[] to screen[] and mark screen[] lines that need updating |
| for (li = 0; li < rows - 1; li++) { |
| int cs, ce; // column start & end |
| char *out_buf; |
| // format current text line |
| out_buf = format_line(tp /*, li*/); |
| |
| // skip to the end of the current text[] line |
| if (tp < end) { |
| char *t = memchr(tp, '\n', end - tp); |
| if (!t) t = end - 1; |
| tp = t + 1; |
| } |
| |
| // see if there are any changes between virtual screen and out_buf |
| changed = FALSE; // assume no change |
| cs = 0; |
| ce = columns - 1; |
| sp = &screen[li * columns]; // start of screen line |
| if (full_screen) { |
| // force re-draw of every single column from 0 - columns-1 |
| goto re0; |
| } |
| // compare newly formatted buffer with virtual screen |
| // look forward for first difference between buf and screen |
| for (; cs <= ce; cs++) { |
| if (out_buf[cs] != sp[cs]) { |
| changed = TRUE; // mark for redraw |
| break; |
| } |
| } |
| |
| // look backward for last difference between out_buf and screen |
| for (; ce >= cs; ce--) { |
| if (out_buf[ce] != sp[ce]) { |
| changed = TRUE; // mark for redraw |
| break; |
| } |
| } |
| // now, cs is index of first diff, and ce is index of last diff |
| |
| // if horz offset has changed, force a redraw |
| if (offset != old_offset) { |
| re0: |
| changed = TRUE; |
| } |
| |
| // make a sanity check of columns indexes |
| if (cs < 0) cs = 0; |
| if (ce > columns - 1) ce = columns - 1; |
| if (cs > ce) { cs = 0; ce = columns - 1; } |
| // is there a change between virtual screen and out_buf |
| if (changed) { |
| // copy changed part of buffer to virtual screen |
| memcpy(sp+cs, out_buf+cs, ce-cs+1); |
| place_cursor(li, cs); |
| // write line out to terminal |
| fwrite(&sp[cs], ce - cs + 1, 1, stdout); |
| } |
| } |
| |
| place_cursor(crow, ccol); |
| |
| old_offset = offset; |
| #undef old_offset |
| } |
| |
| //----- Force refresh of all Lines ----------------------------- |
| static void redraw(int full_screen) |
| { |
| // cursor to top,left; clear to the end of screen |
| write1(ESC_SET_CURSOR_TOPLEFT ESC_CLEAR2EOS); |
| screen_erase(); // erase the internal screen buffer |
| last_status_cksum = 0; // force status update |
| refresh(full_screen); // this will redraw the entire display |
| show_status_line(); |
| } |
| |
| //----- Flash the screen -------------------------------------- |
| static void flash(int h) |
| { |
| standout_start(); |
| redraw(TRUE); |
| mysleep(h); |
| standout_end(); |
| redraw(TRUE); |
| } |
| |
| static void indicate_error(void) |
| { |
| #if ENABLE_FEATURE_VI_CRASHME |
| if (crashme > 0) |
| return; |
| #endif |
| if (!err_method) { |
| write1(ESC_BELL); |
| } else { |
| flash(10); |
| } |
| } |
| |
| //----- IO Routines -------------------------------------------- |
| static int readit(void) // read (maybe cursor) key from stdin |
| { |
| int c; |
| |
| fflush_all(); |
| |
| // Wait for input. TIMEOUT = -1 makes read_key wait even |
| // on nonblocking stdin. |
| // Note: read_key sets errno to 0 on success. |
| again: |
| c = read_key(STDIN_FILENO, readbuffer, /*timeout:*/ -1); |
| if (c == -1) { // EOF/error |
| if (errno == EAGAIN) // paranoia |
| goto again; |
| go_bottom_and_clear_to_eol(); |
| cookmode(); // terminal to "cooked" |
| bb_simple_error_msg_and_die("can't read user input"); |
| } |
| return c; |
| } |
| |
| #if ENABLE_FEATURE_VI_DOT_CMD |
| static int get_one_char(void) |
| { |
| int c; |
| |
| if (!adding2q) { |
| // we are not adding to the q. |
| // but, we may be reading from a saved q. |
| // (checking "ioq" for NULL is wrong, it's not reset to NULL |
| // when done - "ioq_start" is reset instead). |
| if (ioq_start != NULL) { |
| // there is a queue to get chars from. |
| // careful with correct sign expansion! |
| c = (unsigned char)*ioq++; |
| if (c != '\0') |
| return c; |
| // the end of the q |
| free(ioq_start); |
| ioq_start = NULL; |
| // read from STDIN: |
| } |
| return readit(); |
| } |
| // we are adding STDIN chars to q. |
| c = readit(); |
| if (lmc_len >= ARRAY_SIZE(last_modifying_cmd) - 1) { |
| // last_modifying_cmd[] is too small, can't remeber the cmd |
| // - drop it |
| adding2q = 0; |
| lmc_len = 0; |
| } else { |
| last_modifying_cmd[lmc_len++] = c; |
| } |
| return c; |
| } |
| #else |
| # define get_one_char() readit() |
| #endif |
| |
| // Get input line (uses "status line" area) |
| static char *get_input_line(const char *prompt) |
| { |
| // char [MAX_INPUT_LEN] |
| #define buf get_input_line__buf |
| |
| int c; |
| int i; |
| |
| strcpy(buf, prompt); |
| last_status_cksum = 0; // force status update |
| go_bottom_and_clear_to_eol(); |
| write1(prompt); // write out the :, /, or ? prompt |
| |
| i = strlen(buf); |
| while (i < MAX_INPUT_LEN) { |
| c = get_one_char(); |
| if (c == '\n' || c == '\r' || c == 27) |
| break; // this is end of input |
| if (c == term_orig.c_cc[VERASE] || c == 8 || c == 127) { |
| // user wants to erase prev char |
| buf[--i] = '\0'; |
| write1("\b \b"); // erase char on screen |
| if (i <= 0) // user backs up before b-o-l, exit |
| break; |
| } else if (c > 0 && c < 256) { // exclude Unicode |
| // (TODO: need to handle Unicode) |
| buf[i] = c; |
| buf[++i] = '\0'; |
| bb_putchar(c); |
| } |
| } |
| refresh(FALSE); |
| return buf; |
| #undef buf |
| } |
| |
| static void Hit_Return(void) |
| { |
| int c; |
| |
| standout_start(); |
| write1("[Hit return to continue]"); |
| standout_end(); |
| while ((c = get_one_char()) != '\n' && c != '\r') |
| continue; |
| redraw(TRUE); // force redraw all |
| } |
| |
| //----- Draw the status line at bottom of the screen ------------- |
| // show file status on status line |
| static int format_edit_status(void) |
| { |
| static const char cmd_mode_indicator[] ALIGN1 = "-IR-"; |
| |
| #define tot format_edit_status__tot |
| |
| int cur, percent, ret, trunc_at; |
| |
| // modified_count is now a counter rather than a flag. this |
| // helps reduce the amount of line counting we need to do. |
| // (this will cause a mis-reporting of modified status |
| // once every MAXINT editing operations.) |
| |
| // it would be nice to do a similar optimization here -- if |
| // we haven't done a motion that could have changed which line |
| // we're on, then we shouldn't have to do this count_lines() |
| cur = count_lines(text, dot); |
| |
| // count_lines() is expensive. |
| // Call it only if something was changed since last time |
| // we were here: |
| if (modified_count != last_modified_count) { |
| tot = cur + count_lines(dot, end - 1) - 1; |
| last_modified_count = modified_count; |
| } |
| |
| // current line percent |
| // ------------- ~~ ---------- |
| // total lines 100 |
| if (tot > 0) { |
| percent = (100 * cur) / tot; |
| } else { |
| cur = tot = 0; |
| percent = 100; |
| } |
| |
| trunc_at = columns < STATUS_BUFFER_LEN-1 ? |
| columns : STATUS_BUFFER_LEN-1; |
| |
| ret = snprintf(status_buffer, trunc_at+1, |
| #if ENABLE_FEATURE_VI_READONLY |
| "%c %s%s%s %d/%d %d%%", |
| #else |
| "%c %s%s %d/%d %d%%", |
| #endif |
| cmd_mode_indicator[cmd_mode & 3], |
| (current_filename != NULL ? current_filename : "No file"), |
| #if ENABLE_FEATURE_VI_READONLY |
| (readonly_mode ? " [Readonly]" : ""), |
| #endif |
| (modified_count ? " [Modified]" : ""), |
| cur, tot, percent); |
| |
| if (ret >= 0 && ret < trunc_at) |
| return ret; // it all fit |
| |
| return trunc_at; // had to truncate |
| #undef tot |
| } |
| |
| static int bufsum(char *buf, int count) |
| { |
| int sum = 0; |
| char *e = buf + count; |
| while (buf < e) |
| sum += (unsigned char) *buf++; |
| return sum; |
| } |
| |
| static void show_status_line(void) |
| { |
| int cnt = 0, cksum = 0; |
| |
| // either we already have an error or status message, or we |
| // create one. |
| if (!have_status_msg) { |
| cnt = format_edit_status(); |
| cksum = bufsum(status_buffer, cnt); |
| } |
| if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) { |
| last_status_cksum = cksum; // remember if we have seen this line |
| go_bottom_and_clear_to_eol(); |
| write1(status_buffer); |
| if (have_status_msg) { |
| if (((int)strlen(status_buffer) - (have_status_msg - 1)) > |
| (columns - 1) ) { |
| have_status_msg = 0; |
| Hit_Return(); |
| } |
| have_status_msg = 0; |
| } |
| place_cursor(crow, ccol); // put cursor back in correct place |
| } |
| fflush_all(); |
| } |
| |
| //----- format the status buffer, the bottom line of screen ------ |
| static void status_line(const char *format, ...) |
| { |
| va_list args; |
| |
| va_start(args, format); |
| vsnprintf(status_buffer, STATUS_BUFFER_LEN, format, args); |
| va_end(args); |
| |
| have_status_msg = 1; |
| } |
| static void status_line_bold(const char *format, ...) |
| { |
| va_list args; |
| |
| va_start(args, format); |
| strcpy(status_buffer, ESC_BOLD_TEXT); |
| vsnprintf(status_buffer + (sizeof(ESC_BOLD_TEXT)-1), |
| STATUS_BUFFER_LEN - sizeof(ESC_BOLD_TEXT) - sizeof(ESC_NORM_TEXT), |
| format, args |
| ); |
| strcat(status_buffer, ESC_NORM_TEXT); |
| va_end(args); |
| |
| have_status_msg = 1 + (sizeof(ESC_BOLD_TEXT)-1) + (sizeof(ESC_NORM_TEXT)-1); |
| } |
| static void status_line_bold_errno(const char *fn) |
| { |
| status_line_bold("'%s' "STRERROR_FMT, fn STRERROR_ERRNO); |
| } |
| |
| // copy s to buf, convert unprintable |
| static void print_literal(char *buf, const char *s) |
| { |
| char *d; |
| unsigned char c; |
| |
| buf[0] = '\0'; |
| if (!s[0]) |
| s = "(NULL)"; |
| |
| d = buf; |
| for (; *s; s++) { |
| int c_is_no_print; |
| |
| c = *s; |
| c_is_no_print = (c & 0x80) && !Isprint(c); |
| if (c_is_no_print) { |
| strcpy(d, ESC_NORM_TEXT); |
| d += sizeof(ESC_NORM_TEXT)-1; |
| c = '.'; |
| } |
| if (c < ' ' || c == 0x7f) { |
| *d++ = '^'; |
| c |= '@'; // 0x40 |
| if (c == 0x7f) |
| c = '?'; |
| } |
| *d++ = c; |
| *d = '\0'; |
| if (c_is_no_print) { |
| strcpy(d, ESC_BOLD_TEXT); |
| d += sizeof(ESC_BOLD_TEXT)-1; |
| } |
| if (*s == '\n') { |
| *d++ = '$'; |
| *d = '\0'; |
| } |
| if (d - buf > MAX_INPUT_LEN - 10) // paranoia |
| break; |
| } |
| } |
| static void not_implemented(const char *s) |
| { |
| char buf[MAX_INPUT_LEN]; |
| print_literal(buf, s); |
| status_line_bold("'%s' is not implemented", buf); |
| } |
| |
| //----- Block insert/delete, undo ops -------------------------- |
| #if ENABLE_FEATURE_VI_YANKMARK |
| static char *text_yank(char *p, char *q, int dest) // copy text into a register |
| { |
| int cnt = q - p; |
| if (cnt < 0) { // they are backwards- reverse them |
| p = q; |
| cnt = -cnt; |
| } |
| free(reg[dest]); // if already a yank register, free it |
| reg[dest] = xstrndup(p, cnt + 1); |
| return p; |
| } |
| |
| static char what_reg(void) |
| { |
| char c; |
| |
| c = 'D'; // default to D-reg |
| if (YDreg <= 25) |
| c = 'a' + (char) YDreg; |
| if (YDreg == 26) |
| c = 'D'; |
| if (YDreg == 27) |
| c = 'U'; |
| return c; |
| } |
| |
| static void check_context(char cmd) |
| { |
| // A context is defined to be "modifying text" |
| // Any modifying command establishes a new context. |
| |
| if (dot < context_start || dot > context_end) { |
| if (strchr(modifying_cmds, cmd) != NULL) { |
| // we are trying to modify text[]- make this the current context |
| mark[27] = mark[26]; // move cur to prev |
| mark[26] = dot; // move local to cur |
| context_start = prev_line(prev_line(dot)); |
| context_end = next_line(next_line(dot)); |
| //loiter= start_loiter= now; |
| } |
| } |
| } |
| |
| static char *swap_context(char *p) // goto new context for '' command make this the current context |
| { |
| char *tmp; |
| |
| // the current context is in mark[26] |
| // the previous context is in mark[27] |
| // only swap context if other context is valid |
| if (text <= mark[27] && mark[27] <= end - 1) { |
| tmp = mark[27]; |
| mark[27] = p; |
| mark[26] = p = tmp; |
| context_start = prev_line(prev_line(prev_line(p))); |
| context_end = next_line(next_line(next_line(p))); |
| } |
| return p; |
| } |
| #endif /* FEATURE_VI_YANKMARK */ |
| |
| #if ENABLE_FEATURE_VI_UNDO |
| static void undo_push(char *, unsigned, unsigned char); |
| #endif |
| |
| // open a hole in text[] |
| // might reallocate text[]! use p += text_hole_make(p, ...), |
| // and be careful to not use pointers into potentially freed text[]! |
| static uintptr_t text_hole_make(char *p, int size) // at "p", make a 'size' byte hole |
| { |
| uintptr_t bias = 0; |
| |
| if (size <= 0) |
| return bias; |
| end += size; // adjust the new END |
| if (end >= (text + text_size)) { |
| char *new_text; |
| text_size += end - (text + text_size) + 10240; |
| new_text = xrealloc(text, text_size); |
| bias = (new_text - text); |
| screenbegin += bias; |
| dot += bias; |
| end += bias; |
| p += bias; |
| #if ENABLE_FEATURE_VI_YANKMARK |
| { |
| int i; |
| for (i = 0; i < ARRAY_SIZE(mark); i++) |
| if (mark[i]) |
| mark[i] += bias; |
| } |
| #endif |
| text = new_text; |
| } |
| memmove(p + size, p, end - size - p); |
| memset(p, ' ', size); // clear new hole |
| return bias; |
| } |
| |
| // close a hole in text[] - delete "p" through "q", inclusive |
| // "undo" value indicates if this operation should be undo-able |
| #if !ENABLE_FEATURE_VI_UNDO |
| #define text_hole_delete(a,b,c) text_hole_delete(a,b) |
| #endif |
| static char *text_hole_delete(char *p, char *q, int undo) |
| { |
| char *src, *dest; |
| int cnt, hole_size; |
| |
| // move forwards, from beginning |
| // assume p <= q |
| src = q + 1; |
| dest = p; |
| if (q < p) { // they are backward- swap them |
| src = p + 1; |
| dest = q; |
| } |
| hole_size = q - p + 1; |
| cnt = end - src; |
| #if ENABLE_FEATURE_VI_UNDO |
| switch (undo) { |
| case NO_UNDO: |
| break; |
| case ALLOW_UNDO: |
| undo_push(p, hole_size, UNDO_DEL); |
| break; |
| case ALLOW_UNDO_CHAIN: |
| undo_push(p, hole_size, UNDO_DEL_CHAIN); |
| break; |
| # if ENABLE_FEATURE_VI_UNDO_QUEUE |
| case ALLOW_UNDO_QUEUED: |
| undo_push(p, hole_size, UNDO_DEL_QUEUED); |
| break; |
| # endif |
| } |
| modified_count--; |
| #endif |
| if (src < text || src > end) |
| goto thd0; |
| if (dest < text || dest >= end) |
| goto thd0; |
| modified_count++; |
| if (src >= end) |
| goto thd_atend; // just delete the end of the buffer |
| memmove(dest, src, cnt); |
| thd_atend: |
| end = end - hole_size; // adjust the new END |
| if (dest >= end) |
| dest = end - 1; // make sure dest in below end-1 |
| if (end <= text) |
| dest = end = text; // keep pointers valid |
| thd0: |
| return dest; |
| } |
| |
| #if ENABLE_FEATURE_VI_UNDO |
| |
| # if ENABLE_FEATURE_VI_UNDO_QUEUE |
| // Flush any queued objects to the undo stack |
| static void undo_queue_commit(void) |
| { |
| // Pushes the queue object onto the undo stack |
| if (undo_q > 0) { |
| // Deleted character undo events grow from the end |
| undo_push(undo_queue + CONFIG_FEATURE_VI_UNDO_QUEUE_MAX - undo_q, |
| undo_q, |
| (undo_queue_state | UNDO_USE_SPOS) |
| ); |
| undo_queue_state = UNDO_EMPTY; |
| undo_q = 0; |
| } |
| } |
| # else |
| # define undo_queue_commit() ((void)0) |
| # endif |
| |
| static void flush_undo_data(void) |
| { |
| struct undo_object *undo_entry; |
| |
| while (undo_stack_tail) { |
| undo_entry = undo_stack_tail; |
| undo_stack_tail = undo_entry->prev; |
| free(undo_entry); |
| } |
| } |
| |
| // Undo functions and hooks added by Jody Bruchon (jody@jodybruchon.com) |
| // Add to the undo stack |
| static void undo_push(char *src, unsigned length, uint8_t u_type) |
| { |
| struct undo_object *undo_entry; |
| |
| // "u_type" values |
| // UNDO_INS: insertion, undo will remove from buffer |
| // UNDO_DEL: deleted text, undo will restore to buffer |
| // UNDO_{INS,DEL}_CHAIN: Same as above but also calls undo_pop() when complete |
| // The CHAIN operations are for handling multiple operations that the user |
| // performs with a single action, i.e. REPLACE mode or find-and-replace commands |
| // UNDO_{INS,DEL}_QUEUED: If queuing feature is enabled, allow use of the queue |
| // for the INS/DEL operation. The raw values should be equal to the values of |
| // UNDO_{INS,DEL} ORed with UNDO_QUEUED_FLAG |
| |
| # if ENABLE_FEATURE_VI_UNDO_QUEUE |
| // This undo queuing functionality groups multiple character typing or backspaces |
| // into a single large undo object. This greatly reduces calls to malloc() for |
| // single-character operations while typing and has the side benefit of letting |
| // an undo operation remove chunks of text rather than a single character. |
| switch (u_type) { |
| case UNDO_EMPTY: // Just in case this ever happens... |
| return; |
| case UNDO_DEL_QUEUED: |
| if (length != 1) |
| return; // Only queue single characters |
| switch (undo_queue_state) { |
| case UNDO_EMPTY: |
| undo_queue_state = UNDO_DEL; |
| case UNDO_DEL: |
| undo_queue_spos = src; |
| undo_q++; |
| undo_queue[CONFIG_FEATURE_VI_UNDO_QUEUE_MAX - undo_q] = *src; |
| // If queue is full, dump it into an object |
| if (undo_q == CONFIG_FEATURE_VI_UNDO_QUEUE_MAX) |
| undo_queue_commit(); |
| return; |
| case UNDO_INS: |
| // Switch from storing inserted text to deleted text |
| undo_queue_commit(); |
| undo_push(src, length, UNDO_DEL_QUEUED); |
| return; |
| } |
| break; |
| case UNDO_INS_QUEUED: |
| if (length < 1) |
| return; |
| switch (undo_queue_state) { |
| case UNDO_EMPTY: |
| undo_queue_state = UNDO_INS; |
| undo_queue_spos = src; |
| case UNDO_INS: |
| while (length--) { |
| undo_q++; // Don't need to save any data for insertions |
| if (undo_q == CONFIG_FEATURE_VI_UNDO_QUEUE_MAX) |
| undo_queue_commit(); |
| } |
| return; |
| case UNDO_DEL: |
| // Switch from storing deleted text to inserted text |
| undo_queue_commit(); |
| undo_push(src, length, UNDO_INS_QUEUED); |
| return; |
| } |
| break; |
| } |
| # else |
| // If undo queuing is disabled, ignore the queuing flag entirely |
| u_type = u_type & ~UNDO_QUEUED_FLAG; |
| # endif |
| |
| // Allocate a new undo object |
| if (u_type == UNDO_DEL || u_type == UNDO_DEL_CHAIN) { |
| // For UNDO_DEL objects, save deleted text |
| if ((text + length) == end) |
| length--; |
| // If this deletion empties text[], strip the newline. When the buffer becomes |
| // zero-length, a newline is added back, which requires this to compensate. |
| undo_entry = xzalloc(offsetof(struct undo_object, undo_text) + length); |
| memcpy(undo_entry->undo_text, src, length); |
| } else { |
| undo_entry = xzalloc(sizeof(*undo_entry)); |
| } |
| undo_entry->length = length; |
| # if ENABLE_FEATURE_VI_UNDO_QUEUE |
| if ((u_type & UNDO_USE_SPOS) != 0) { |
| undo_entry->start = undo_queue_spos - text; // use start position from queue |
| } else { |
| undo_entry->start = src - text; // use offset from start of text buffer |
| } |
| u_type = (u_type & ~UNDO_USE_SPOS); |
| # else |
| undo_entry->start = src - text; |
| # endif |
| undo_entry->u_type = u_type; |
| |
| // Push it on undo stack |
| undo_entry->prev = undo_stack_tail; |
| undo_stack_tail = undo_entry; |
| modified_count++; |
| } |
| |
| static void undo_push_insert(char *p, int len, int undo) |
| { |
| switch (undo) { |
| case ALLOW_UNDO: |
| undo_push(p, len, UNDO_INS); |
| break; |
| case ALLOW_UNDO_CHAIN: |
| undo_push(p, len, UNDO_INS_CHAIN); |
| break; |
| # if ENABLE_FEATURE_VI_UNDO_QUEUE |
| case ALLOW_UNDO_QUEUED: |
| undo_push(p, len, UNDO_INS_QUEUED); |
| break; |
| # endif |
| } |
| } |
| |
| // Undo the last operation |
| static void undo_pop(void) |
| { |
| int repeat; |
| char *u_start, *u_end; |
| struct undo_object *undo_entry; |
| |
| // Commit pending undo queue before popping (should be unnecessary) |
| undo_queue_commit(); |
| |
| undo_entry = undo_stack_tail; |
| // Check for an empty undo stack |
| if (!undo_entry) { |
| status_line("Already at oldest change"); |
| return; |
| } |
| |
| switch (undo_entry->u_type) { |
| case UNDO_DEL: |
| case UNDO_DEL_CHAIN: |
| // make hole and put in text that was deleted; deallocate text |
| u_start = text + undo_entry->start; |
| text_hole_make(u_start, undo_entry->length); |
| memcpy(u_start, undo_entry->undo_text, undo_entry->length); |
| status_line("Undo [%d] %s %d chars at position %d", |
| modified_count, "restored", |
| undo_entry->length, undo_entry->start |
| ); |
| break; |
| case UNDO_INS: |
| case UNDO_INS_CHAIN: |
| // delete what was inserted |
| u_start = undo_entry->start + text; |
| u_end = u_start - 1 + undo_entry->length; |
| text_hole_delete(u_start, u_end, NO_UNDO); |
| status_line("Undo [%d] %s %d chars at position %d", |
| modified_count, "deleted", |
| undo_entry->length, undo_entry->start |
| ); |
| break; |
| } |
| repeat = 0; |
| switch (undo_entry->u_type) { |
| // If this is the end of a chain, lower modification count and refresh display |
| case UNDO_DEL: |
| case UNDO_INS: |
| dot = (text + undo_entry->start); |
| refresh(FALSE); |
| break; |
| case UNDO_DEL_CHAIN: |
| case UNDO_INS_CHAIN: |
| repeat = 1; |
| break; |
| } |
| // Deallocate the undo object we just processed |
| undo_stack_tail = undo_entry->prev; |
| free(undo_entry); |
| modified_count--; |
| // For chained operations, continue popping all the way down the chain. |
| if (repeat) { |
| undo_pop(); // Follow the undo chain if one exists |
| } |
| } |
| |
| #else |
| # define flush_undo_data() ((void)0) |
| # define undo_queue_commit() ((void)0) |
| #endif /* ENABLE_FEATURE_VI_UNDO */ |
| |
| //----- Dot Movement Routines ---------------------------------- |
| static void dot_left(void) |
| { |
| undo_queue_commit(); |
| if (dot > text && dot[-1] != '\n') |
| dot--; |
| } |
| |
| static void dot_right(void) |
| { |
| undo_queue_commit(); |
| if (dot < end - 1 && *dot != '\n') |
| dot++; |
| } |
| |
| static void dot_begin(void) |
| { |
| undo_queue_commit(); |
| dot = begin_line(dot); // return pointer to first char cur line |
| } |
| |
| static void dot_end(void) |
| { |
| undo_queue_commit(); |
| dot = end_line(dot); // return pointer to last char cur line |
| } |
| |
| static char *move_to_col(char *p, int l) |
| { |
| int co; |
| |
| p = begin_line(p); |
| co = 0; |
| while (co < l && p < end) { |
| if (*p == '\n') //vda || *p == '\0') |
| break; |
| if (*p == '\t') { |
| co = next_tabstop(co); |
| } else if (*p < ' ' || *p == 127) { |
| co++; // display as ^X, use 2 columns |
| } |
| co++; |
| p++; |
| } |
| return p; |
| } |
| |
| static void dot_next(void) |
| { |
| undo_queue_commit(); |
| dot = next_line(dot); |
| } |
| |
| static void dot_prev(void) |
| { |
| undo_queue_commit(); |
| dot = prev_line(dot); |
| } |
| |
| static void dot_skip_over_ws(void) |
| { |
| // skip WS |
| while (isspace(*dot) && *dot != '\n' && dot < end - 1) |
| dot++; |
| } |
| |
| static void dot_scroll(int cnt, int dir) |
| { |
| char *q; |
| |
| undo_queue_commit(); |
| for (; cnt > 0; cnt--) { |
| if (dir < 0) { |
| // scroll Backwards |
| // ctrl-Y scroll up one line |
| screenbegin = prev_line(screenbegin); |
| } else { |
| // scroll Forwards |
| // ctrl-E scroll down one line |
| screenbegin = next_line(screenbegin); |
| } |
| } |
| // make sure "dot" stays on the screen so we dont scroll off |
| if (dot < screenbegin) |
| dot = screenbegin; |
| q = end_screen(); // find new bottom line |
| if (dot > q) |
| dot = begin_line(q); // is dot is below bottom line? |
| dot_skip_over_ws(); |
| } |
| |
| static char *bound_dot(char *p) // make sure text[0] <= P < "end" |
| { |
| if (p >= end && end > text) { |
| p = end - 1; |
| indicate_error(); |
| } |
| if (p < text) { |
| p = text; |
| indicate_error(); |
| } |
| return p; |
| } |
| |
| #if ENABLE_FEATURE_VI_DOT_CMD |
| static void start_new_cmd_q(char c) |
| { |
| // get buffer for new cmd |
| // if there is a current cmd count put it in the buffer first |
| if (cmdcnt > 0) { |
| lmc_len = sprintf(last_modifying_cmd, "%u%c", cmdcnt, c); |
| } else { // just save char c onto queue |
| last_modifying_cmd[0] = c; |
| lmc_len = 1; |
| } |
| adding2q = 1; |
| } |
| static void end_cmd_q(void) |
| { |
| # if ENABLE_FEATURE_VI_YANKMARK |
| YDreg = 26; // go back to default Yank/Delete reg |
| # endif |
| adding2q = 0; |
| } |
| #else |
| # define end_cmd_q() ((void)0) |
| #endif /* FEATURE_VI_DOT_CMD */ |
| |
| // copy text into register, then delete text. |
| // if dist <= 0, do not include, or go past, a NewLine |
| // |
| #if !ENABLE_FEATURE_VI_UNDO |
| #define yank_delete(a,b,c,d,e) yank_delete(a,b,c,d) |
| #endif |
| static char *yank_delete(char *start, char *stop, int dist, int yf, int undo) |
| { |
| char *p; |
| |
| // make sure start <= stop |
| if (start > stop) { |
| // they are backwards, reverse them |
| p = start; |
| start = stop; |
| stop = p; |
| } |
| if (dist <= 0) { |
| // we cannot cross NL boundaries |
| p = start; |
| if (*p == '\n') |
| return p; |
| // dont go past a NewLine |
| for (; p + 1 <= stop; p++) { |
| if (p[1] == '\n') { |
| stop = p; // "stop" just before NewLine |
| break; |
| } |
| } |
| } |
| p = start; |
| #if ENABLE_FEATURE_VI_YANKMARK |
| text_yank(start, stop, YDreg); |
| #endif |
| if (yf == YANKDEL) { |
| p = text_hole_delete(start, stop, undo); |
| } // delete lines |
| return p; |
| } |
| |
| // might reallocate text[]! |
| static int file_insert(const char *fn, char *p, int initial) |
| { |
| int cnt = -1; |
| int fd, size; |
| struct stat statbuf; |
| |
| if (p < text) |
| p = text; |
| if (p > end) |
| p = end; |
| |
| fd = open(fn, O_RDONLY); |
| if (fd < 0) { |
| if (!initial) |
| status_line_bold_errno(fn); |
| return cnt; |
| } |
| |
| // Validate file |
| if (fstat(fd, &statbuf) < 0) { |
| status_line_bold_errno(fn); |
| goto fi; |
| } |
| if (!S_ISREG(statbuf.st_mode)) { |
| status_line_bold("'%s' is not a regular file", fn); |
| goto fi; |
| } |
| size = (statbuf.st_size < INT_MAX ? (int)statbuf.st_size : INT_MAX); |
| p += text_hole_make(p, size); |
| cnt = full_read(fd, p, size); |
| if (cnt < 0) { |
| status_line_bold_errno(fn); |
| p = text_hole_delete(p, p + size - 1, NO_UNDO); // un-do buffer insert |
| } else if (cnt < size) { |
| // There was a partial read, shrink unused space |
| p = text_hole_delete(p + cnt, p + size - 1, NO_UNDO); |
| status_line_bold("can't read '%s'", fn); |
| } |
| fi: |
| close(fd); |
| |
| #if ENABLE_FEATURE_VI_READONLY |
| if (initial |
| && ((access(fn, W_OK) < 0) || |
| // root will always have access() |
| // so we check fileperms too |
| !(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH)) |
| ) |
| ) { |
| SET_READONLY_FILE(readonly_mode); |
| } |
| #endif |
| return cnt; |
| } |
| |
| // find matching char of pair () [] {} |
| // will crash if c is not one of these |
| static char *find_pair(char *p, const char c) |
| { |
| const char *braces = "()[]{}"; |
| char match; |
| int dir, level; |
| |
| dir = strchr(braces, c) - braces; |
| dir ^= 1; |
| match = braces[dir]; |
| dir = ((dir & 1) << 1) - 1; // 1 for ([{, -1 for )\} |
| |
| // look for match, count levels of pairs (( )) |
| level = 1; |
| for (;;) { |
| p += dir; |
| if (p < text || p >= end) |
| return NULL; |
| if (*p == c) |
| level++; // increase pair levels |
| if (*p == match) { |
| level--; // reduce pair level |
| if (level == 0) |
| return p; // found matching pair |
| } |
| } |
| } |
| |
| #if ENABLE_FEATURE_VI_SETOPTS |
| // show the matching char of a pair, () [] {} |
| static void showmatching(char *p) |
| { |
| char *q, *save_dot; |
| |
| // we found half of a pair |
| q = find_pair(p, *p); // get loc of matching char |
| if (q == NULL) { |
| indicate_error(); // no matching char |
| } else { |
| // "q" now points to matching pair |
| save_dot = dot; // remember where we are |
| dot = q; // go to new loc |
| refresh(FALSE); // let the user see it |
| mysleep(40); // give user some time |
| dot = save_dot; // go back to old loc |
| refresh(FALSE); |
| } |
| } |
| #endif /* FEATURE_VI_SETOPTS */ |
| |
| // might reallocate text[]! use p += stupid_insert(p, ...), |
| // and be careful to not use pointers into potentially freed text[]! |
| static uintptr_t stupid_insert(char *p, char c) // stupidly insert the char c at 'p' |
| { |
| uintptr_t bias; |
| bias = text_hole_make(p, 1); |
| p += bias; |
| *p = c; |
| return bias; |
| } |
| |
| #if !ENABLE_FEATURE_VI_UNDO |
| #define char_insert(a,b,c) char_insert(a,b) |
| #endif |
| static char *char_insert(char *p, char c, int undo) // insert the char c at 'p' |
| { |
| if (c == 22) { // Is this an ctrl-V? |
| p += stupid_insert(p, '^'); // use ^ to indicate literal next |
| refresh(FALSE); // show the ^ |
| c = get_one_char(); |
| *p = c; |
| #if ENABLE_FEATURE_VI_UNDO |
| undo_push_insert(p, 1, undo); |
| #else |
| modified_count++; |
| #endif |
| p++; |
| } else if (c == 27) { // Is this an ESC? |
| cmd_mode = 0; |
| undo_queue_commit(); |
| cmdcnt = 0; |
| end_cmd_q(); // stop adding to q |
| last_status_cksum = 0; // force status update |
| if ((p[-1] != '\n') && (dot > text)) { |
| p--; |
| } |
| } else if (c == term_orig.c_cc[VERASE] || c == 8 || c == 127) { // Is this a BS |
| if (p > text) { |
| p--; |
| p = text_hole_delete(p, p, ALLOW_UNDO_QUEUED); // shrink buffer 1 char |
| } |
| } else { |
| // insert a char into text[] |
| if (c == 13) |
| c = '\n'; // translate \r to \n |
| #if ENABLE_FEATURE_VI_UNDO |
| # if ENABLE_FEATURE_VI_UNDO_QUEUE |
| if (c == '\n') |
| undo_queue_commit(); |
| # endif |
| undo_push_insert(p, 1, undo); |
| #else |
| modified_count++; |
| #endif |
| p += 1 + stupid_insert(p, c); // insert the char |
| #if ENABLE_FEATURE_VI_SETOPTS |
| if (showmatch && strchr(")]}", c) != NULL) { |
| showmatching(p - 1); |
| } |
| if (autoindent && c == '\n') { // auto indent the new line |
| char *q; |
| size_t len; |
| q = prev_line(p); // use prev line as template |
| len = strspn(q, " \t"); // space or tab |
| if (len) { |
| uintptr_t bias; |
| bias = text_hole_make(p, len); |
| p += bias; |
| q += bias; |
| #if ENABLE_FEATURE_VI_UNDO |
| undo_push_insert(p, len, undo); |
| #endif |
| memcpy(p, q, len); |
| p += len; |
| } |
| } |
| #endif |
| } |
| return p; |
| } |
| |
| // read text from file or create an empty buf |
| // will also update current_filename |
| static int init_text_buffer(char *fn) |
| { |
| int rc; |
| |
| // allocate/reallocate text buffer |
| free(text); |
| text_size = 10240; |
| screenbegin = dot = end = text = xzalloc(text_size); |
| |
| if (fn != current_filename) { |
| free(current_filename); |
| current_filename = xstrdup(fn); |
| } |
| rc = file_insert(fn, text, 1); |
| if (rc < 0) { |
| // file doesnt exist. Start empty buf with dummy line |
| char_insert(text, '\n', NO_UNDO); |
| } |
| |
| flush_undo_data(); |
| modified_count = 0; |
| last_modified_count = -1; |
| #if ENABLE_FEATURE_VI_YANKMARK |
| // init the marks |
| memset(mark, 0, sizeof(mark)); |
| #endif |
| return rc; |
| } |
| |
| #if ENABLE_FEATURE_VI_YANKMARK \ |
| || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \ |
| || ENABLE_FEATURE_VI_CRASHME |
| // might reallocate text[]! use p += string_insert(p, ...), |
| // and be careful to not use pointers into potentially freed text[]! |
| # if !ENABLE_FEATURE_VI_UNDO |
| # define string_insert(a,b,c) string_insert(a,b) |
| # endif |
| static uintptr_t string_insert(char *p, const char *s, int undo) // insert the string at 'p' |
| { |
| uintptr_t bias; |
| int i; |
| |
| i = strlen(s); |
| #if ENABLE_FEATURE_VI_UNDO |
| undo_push_insert(p, i, undo); |
| #endif |
| bias = text_hole_make(p, i); |
| p += bias; |
| memcpy(p, s, i); |
| #if ENABLE_FEATURE_VI_YANKMARK |
| { |
| int cnt; |
| for (cnt = 0; *s != '\0'; s++) { |
| if (*s == '\n') |
| cnt++; |
| } |
| status_line("Put %d lines (%d chars) from [%c]", cnt, i, what_reg()); |
| } |
| #endif |
| return bias; |
| } |
| #endif |
| |
| static int file_write(char *fn, char *first, char *last) |
| { |
| int fd, cnt, charcnt; |
| |
| if (fn == 0) { |
| status_line_bold("No current filename"); |
| return -2; |
| } |
| // By popular request we do not open file with O_TRUNC, |
| // but instead ftruncate() it _after_ successful write. |
| // Might reduce amount of data lost on power fail etc. |
| fd = open(fn, (O_WRONLY | O_CREAT), 0666); |
| if (fd < 0) |
| return -1; |
| cnt = last - first + 1; |
| charcnt = full_write(fd, first, cnt); |
| ftruncate(fd, charcnt); |
| if (charcnt == cnt) { |
| // good write |
| //modified_count = FALSE; |
| } else { |
| charcnt = 0; |
| } |
| close(fd); |
| return charcnt; |
| } |
| |
| #if ENABLE_FEATURE_VI_SEARCH |
| # if ENABLE_FEATURE_VI_REGEX_SEARCH |
| // search for pattern starting at p |
| static char *char_search(char *p, const char *pat, int dir_and_range) |
| { |
| struct re_pattern_buffer preg; |
| const char *err; |
| char *q; |
| int i; |
| int size; |
| int range; |
| |
| re_syntax_options = RE_SYNTAX_POSIX_EXTENDED; |
| if (ignorecase) |
| re_syntax_options = RE_SYNTAX_POSIX_EXTENDED | RE_ICASE; |
| |
| memset(&preg, 0, sizeof(preg)); |
| err = re_compile_pattern(pat, strlen(pat), &preg); |
| if (err != NULL) { |
| status_line_bold("bad search pattern '%s': %s", pat, err); |
| return p; |
| } |
| |
| range = (dir_and_range & 1); |
| q = end - 1; // if FULL |
| if (range == LIMITED) |
| q = next_line(p); |
| if (dir_and_range < 0) { // BACK? |
| q = text; |
| if (range == LIMITED) |
| q = prev_line(p); |
| } |
| |
| // RANGE could be negative if we are searching backwards |
| range = q - p; |
| q = p; |
| size = range; |
| if (range < 0) { |
| size = -size; |
| q = p - size; |
| if (q < text) |
| q = text; |
| } |
| // search for the compiled pattern, preg, in p[] |
| // range < 0: search backward |
| // range > 0: search forward |
| // 0 < start < size |
| // re_search() < 0: not found or error |
| // re_search() >= 0: index of found pattern |
| // struct pattern char int int int struct reg |
| // re_search(*pattern_buffer, *string, size, start, range, *regs) |
| i = re_search(&preg, q, size, /*start:*/ 0, range, /*struct re_registers*:*/ NULL); |
| regfree(&preg); |
| if (i < 0) |
| return NULL; |
| if (dir_and_range > 0) // FORWARD? |
| p = p + i; |
| else |
| p = p - i; |
| return p; |
| } |
| # else |
| # if ENABLE_FEATURE_VI_SETOPTS |
| static int mycmp(const char *s1, const char *s2, int len) |
| { |
| if (ignorecase) { |
| return strncasecmp(s1, s2, len); |
| } |
| return strncmp(s1, s2, len); |
| } |
| # else |
| # define mycmp strncmp |
| # endif |
| static char *char_search(char *p, const char *pat, int dir_and_range) |
| { |
| char *start, *stop; |
| int len; |
| int range; |
| |
| len = strlen(pat); |
| range = (dir_and_range & 1); |
| if (dir_and_range > 0) { //FORWARD? |
| stop = end - 1; // assume range is p..end-1 |
| if (range == LIMITED) |
| stop = next_line(p); // range is to next line |
| for (start = p; start < stop; start++) { |
| if (mycmp(start, pat, len) == 0) { |
| return start; |
| } |
| } |
| } else { //BACK |
| stop = text; // assume range is text..p |
| if (range == LIMITED) |
| stop = prev_line(p); // range is to prev line |
| for (start = p - len; start >= stop; start--) { |
| if (mycmp(start, pat, len) == 0) { |
| return start; |
| } |
| } |
| } |
| // pattern not found |
| return NULL; |
| } |
| # endif |
| #endif /* FEATURE_VI_SEARCH */ |
| |
| //----- The Colon commands ------------------------------------- |
| #if ENABLE_FEATURE_VI_COLON |
| static char *get_one_address(char *p, int *addr) // get colon addr, if present |
| { |
| int st; |
| char *q; |
| IF_FEATURE_VI_YANKMARK(char c;) |
| |
| *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); |
| } |
| } |
| } |
| #endif |
| #if ENABLE_FEATURE_VI_SEARCH |
| else if (*p == '/') { // a search pattern |
| q = strchrnul(p + 1, '/'); |
| if (p + 1 != q) { |
| // save copy of new pattern |
| free(last_search_pattern); |
| last_search_pattern = xstrndup(p, q - p); |
| } |
| p = q; |
| if (*p == '/') |
| p++; |
| q = char_search(next_line(dot), last_search_pattern + 1, |
| (FORWARD << 1) | FULL); |
| if (q != NULL) { |
| *addr = count_lines(text, q); |
| } |
| } |
| #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 { |
| // unrecognized 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 + ' ' |
| |
| // maybe strncmp? we had tons of erroneous strncasecmp's... |
| if (strncasecmp(a, opname, l) == 0 |
| || strncasecmp(a, short_opname, 2) == 0 |
| ) { |
| if (flg_no) |
| vi_setops &= ~opt; |
| else |
| vi_setops |= opt; |
| } |
| } |
| #endif |
| |
| #endif /* FEATURE_VI_COLON */ |
| |
| // buf must be no longer than MAX_INPUT_LEN! |
| static void colon(char *buf) |
| { |
| #if !ENABLE_FEATURE_VI_COLON |
| // Simple ":cmd" handler with minimal set of commands |
| char *p = buf; |
| int cnt; |
| |
| if (*p == ':') |
| p++; |
| cnt = strlen(p); |
| if (cnt == 0) |
| return; |
| if (strncmp(p, "quit", cnt) == 0 |
| || strncmp(p, "q!", cnt) == 0 |
| ) { |
| if (modified_count && p[1] != '!') { |
| status_line_bold("No write since last change (:%s! overrides)", p); |
| } else { |
| editing = 0; |
| } |
| return; |
| } |
| if (strncmp(p, "write", cnt) == 0 |
| || strncmp(p, "wq", cnt) == 0 |
| || strncmp(p, "wn", cnt) == 0 |
| || (p[0] == 'x' && !p[1]) |
| ) { |
| if (modified_count != 0 || p[0] != 'x') { |
| cnt = file_write(current_filename, text, end - 1); |
| } |
| if (cnt < 0) { |
| if (cnt == -1) |
| status_line_bold("Write error: "STRERROR_FMT STRERROR_ERRNO); |
| } else { |
| modified_count = 0; |
| last_modified_count = -1; |
| status_line("'%s' %uL, %uC", |
| current_filename, |
| count_lines(text, end - 1), cnt |
| ); |
| if (p[0] == 'x' |
| || p[1] == 'q' || p[1] == 'n' |
| || p[1] == 'Q' || p[1] == 'N' |
| ) { |
| editing = 0; |
| } |
| } |
| return; |
| } |
| if (strncmp(p, "file", cnt) == 0) { |
| last_status_cksum = 0; // force status update |
| return; |
| } |
| if (sscanf(p, "%d", &cnt) > 0) { |
| dot = find_line(cnt); |
| dot_skip_over_ws(); |
| return; |
| } |
| not_implemented(p); |
| #else |
| |
| char c, *buf1, *q, *r; |
| char *fn, cmd[MAX_INPUT_LEN], args[MAX_INPUT_LEN]; |
| int i, l, li, b, e; |
| int useforce; |
| # if ENABLE_FEATURE_VI_SEARCH || ENABLE_FEATURE_ALLOW_EXEC |
| char *orig_buf; |
| # endif |
| |
| // :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 ret; |
| if (*buf == ':') |
| buf++; // move past the ':' |
| |
| li = 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); |
| |
| # if ENABLE_FEATURE_VI_SEARCH || ENABLE_FEATURE_ALLOW_EXEC |
| // remember orig command line |
| orig_buf = buf; |
| # endif |
| |
| // 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 (cmd[0] == '!') { // run a cmd |
| int retcode; |
| // :!ls run the <cmd> |
| go_bottom_and_clear_to_eol(); |
| cookmode(); |
| retcode = system(orig_buf + 1); // run the cmd |
| if (retcode) |
| printf("\nshell returned %i\n\n", retcode); |
| rawmode(); |
| Hit_Return(); // let user see results |
| } |
| # endif |
| else if (cmd[0] == '=' && !cmd[1]) { // where is the address |
| if (b < 0) { // no addr given- use defaults |
| b = e = count_lines(text, dot); |
| } |
| status_line("%d", b); |
| } else if (strncmp(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, ALLOW_UNDO); // save, then delete lines |
| dot_skip_over_ws(); |
| } else if (strncmp(cmd, "edit", i) == 0) { // Edit a file |
| int size; |
| |
| // don't edit, if the current file has been modified |
| if (modified_count && !useforce) { |
| status_line_bold("No write since last change (:%s! overrides)", cmd); |
| goto ret; |
| } |
| 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 ret; |
| } |
| |
| size = init_text_buffer(fn); |
| |
| # if ENABLE_FEATURE_VI_YANKMARK |
| if (Ureg >= 0 && Ureg < 28) { |
| free(reg[Ureg]); // free orig line reg- for 'U' |
| reg[Ureg] = NULL; |
| } |
| /*if (YDreg < 28) - always true*/ { |
| free(reg[YDreg]); // free default yank/delete register |
| reg[YDreg] = NULL; |
| } |
| # endif |
| // how many lines in text[]? |
| li = count_lines(text, end - 1); |
| status_line("'%s'%s" |
| IF_FEATURE_VI_READONLY("%s") |
| " %uL, %uC", |
| current_filename, |
| (size < 0 ? " [New file]" : ""), |
| IF_FEATURE_VI_READONLY( |
| ((readonly_mode) ? " [Readonly]" : ""), |
| ) |
| li, (int)(end - text) |
| ); |
| } else if (strncmp(cmd, "file", i) == 0) { // what File is this |
| if (b != -1 || e != -1) { |
| status_line_bold("No address allowed on this command"); |
| goto ret; |
| } |
| 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 (strncmp(cmd, "features", i) == 0) { // what features are available |
| // print out values of all features |
| go_bottom_and_clear_to_eol(); |
| cookmode(); |
| show_help(); |
| rawmode(); |
| Hit_Return(); |
| } else if (strncmp(cmd, "list", i) == 0) { // literal print line |
| if (b < 0) { // no addr given- use defaults |
| q = begin_line(dot); // assume .,. for the range |
| r = end_line(dot); |
| } |
| go_bottom_and_clear_to_eol(); |
| puts("\r"); |
| for (; q <= r; q++) { |
| int c_is_no_print; |
| |
| c = *q; |
| c_is_no_print = (c & 0x80) && !Isprint(c); |
| if (c_is_no_print) { |
| c = '.'; |
| standout_start(); |
| } |
| if (c == '\n') { |
| write1("$\r"); |
| } else if (c < ' ' || c == 127) { |
| bb_putchar('^'); |
| if (c == 127) |
| c = '?'; |
| else |
| c += '@'; |
| } |
| bb_putchar(c); |
| if (c_is_no_print) |
| standout_end(); |
| } |
| Hit_Return(); |
| } else if (strncmp(cmd, "quit", i) == 0 // quit |
| || strncmp(cmd, "next", i) == 0 // edit next file |
| || strncmp(cmd, "prev", i) == 0 // edit previous file |
| ) { |
| int n; |
| if (useforce) { |
| if (*cmd == 'q') { |
| // force end of argv list |
| optind = cmdline_filecnt; |
| } |
| editing = 0; |
| goto ret; |
| } |
| // don't exit if the file been modified |
| if (modified_count) { |
| status_line_bold("No write since last change (:%s! overrides)", cmd); |
| goto ret; |
| } |
| // are there other file to edit |
| n = cmdline_filecnt - optind - 1; |
| if (*cmd == 'q' && n > 0) { |
| status_line_bold("%u more file(s) to edit", n); |
| goto ret; |
| } |
| if (*cmd == 'n' && n <= 0) { |
| status_line_bold("No more files to edit"); |
| goto ret; |
| } |
| if (*cmd == 'p') { |
| // are there previous files to edit |
| if (optind < 1) { |
| status_line_bold("No previous files to edit"); |
| goto ret; |
| } |
| optind -= 2; |
| } |
| editing = 0; |
| } else if (strncmp(cmd, "read", i) == 0) { // read file into text[] |
| int size; |
| |
| fn = args; |
| if (!fn[0]) { |
| status_line_bold("No filename given"); |
| goto ret; |
| } |
| 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); |
| // read after last line |
| if (q == end-1) |
| ++q; |
| } |
| { // dance around potentially-reallocated text[] |
| uintptr_t ofs = q - text; |
| size = file_insert(fn, q, 0); |
| q = text + ofs; |
| } |
| if (size < 0) |
| goto ret; // nothing was inserted |
| // how many lines in text[]? |
| li = count_lines(q, q + size - 1); |
| status_line("'%s'" |
| IF_FEATURE_VI_READONLY("%s") |
| " %uL, %uC", |
| fn, |
| IF_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),) |
| li, size |
| ); |
| if (size > 0) { |
| // if the insert is before "dot" then we need to update |
| if (q <= dot) |
| dot += size; |
| } |
| } else if (strncmp(cmd, "rewind", i) == 0) { // rewind cmd line args |
| if (modified_count && !useforce) { |
| status_line_bold("No write since last change (:%s! overrides)", cmd); |
| } else { |
| // reset the filenames to edit |
| optind = -1; // start from 0th file |
| editing = 0; |
| } |
| # if ENABLE_FEATURE_VI_SET |
| } else if (strncmp(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 delimiter. What about tab '\t'? |
| if (!args[0] || strcasecmp(args, "all") == 0) { |
| // print out values of all options |
| # if ENABLE_FEATURE_VI_SETOPTS |
| status_line_bold( |
| "%sautoindent " |
| "%sflash " |
| "%signorecase " |
| "%sshowmatch " |
| "tabstop=%u", |
| autoindent ? "" : "no", |
| err_method ? "" : "no", |
| ignorecase ? "" : "no", |
| showmatch ? "" : "no", |
| tabstop |
| ); |
| # endif |
| goto ret; |
| } |
| # if ENABLE_FEATURE_VI_SETOPTS |
| argp = args; |
| while (*argp) { |
| if (strncmp(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, "sm", VI_SHOWMATCH ); |
| if (strncmp(argp + i, "tabstop=", 8) == 0) { |
| int t = 0; |
| sscanf(argp + i+8, "%u", &t); |
| if (t > 0 && t <= MAX_TABSTOP) |
| tabstop = t; |
| } |
| argp = skip_non_whitespace(argp); |
| argp = skip_whitespace(argp); |
| } |
| # endif /* FEATURE_VI_SETOPTS */ |
| # endif /* FEATURE_VI_SET */ |
| |
| # if ENABLE_FEATURE_VI_SEARCH |
| } else if (cmd[0] == 's') { // substitute a pattern with a replacement pattern |
| char *F, *R, *flags; |
| size_t len_F, len_R; |
| int gflag; // global replace flag |
| # if ENABLE_FEATURE_VI_UNDO |
| int dont_chain_first_item = ALLOW_UNDO; |
| # endif |
| |
| // F points to the "find" pattern |
| // R points to the "replace" pattern |
| // replace the cmd line delimiters "/" with NULs |
| 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; |
| len_F = R - F; |
| *R++ = '\0'; // terminate "find" |
| flags = strchr(R, c); |
| if (!flags) |
| goto colon_s_fail; |
| len_R = flags - R; |
| *flags++ = '\0'; // terminate "replace" |
| gflag = *flags; |
| |
| 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 |
| char *ls = q; // orig line start |
| char *found; |
| vc4: |
| found = char_search(q, F, (FORWARD << 1) | LIMITED); // search cur line only for "find" |
| if (found) { |
| uintptr_t bias; |
| // we found the "find" pattern - delete it |
| // For undo support, the first item should not be chained |
| text_hole_delete(found, found + len_F - 1, dont_chain_first_item); |
| # if ENABLE_FEATURE_VI_UNDO |
| dont_chain_first_item = ALLOW_UNDO_CHAIN; |
| # endif |
| // insert the "replace" patern |
| bias = string_insert(found, R, ALLOW_UNDO_CHAIN); |
| found += bias; |
| ls += bias; |
| //q += bias; - recalculated anyway |
| // check for "global" :s/foo/bar/g |
| if (gflag == 'g') { |
| if ((found + len_R) < end_line(ls)) { |
| q = found + len_R; |
| goto vc4; // don't let q move past cur line |
| } |
| } |
| } |
| q = next_line(ls); |
| } |
| # endif /* FEATURE_VI_SEARCH */ |
| } else if (strncmp(cmd, "version", i) == 0) { // show software version |
| status_line(BB_VER); |
| } else if (strncmp(cmd, "write", i) == 0 // write text to file |
| || strncmp(cmd, "wq", i) == 0 |
| || strncmp(cmd, "wn", i) == 0 |
| || (cmd[0] == 'x' && !cmd[1]) |
| ) { |
| int size; |
| //int forced = FALSE; |
| |
| // 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' is read only", fn); |
| goto ret; |
| } |
| # endif |
| //if (useforce) { |
| // if "fn" is not write-able, chmod u+w |
| // sprintf(syscmd, "chmod u+w %s", fn); |
| // system(syscmd); |
| // forced = TRUE; |
| //} |
| if (modified_count != 0 || cmd[0] != 'x') { |
| size = r - q + 1; |
| l = file_write(fn, q, r); |
| } else { |
| size = 0; |
| l = 0; |
| } |
| //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_errno(fn); |
| } else { |
| // how many lines written |
| li = count_lines(q, q + l - 1); |
| status_line("'%s' %uL, %uC", fn, li, l); |
| if (l == size) { |
| if (q == text && q + l == end) { |
| modified_count = 0; |
| last_modified_count = -1; |
| } |
| if (cmd[0] == 'x' |
| || cmd[1] == 'q' || cmd[1] == 'n' |
| || cmd[1] == 'Q' || cmd[1] == 'N' |
| ) { |
| editing = 0; |
| } |
| } |
| } |
| # if ENABLE_FEATURE_VI_YANKMARK |
| } else if (strncmp(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); |
| } |
| ret: |
| 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 */ |
| } |
| |
| //----- 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 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; |
| } |
| |
| #if ENABLE_FEATURE_VI_USE_SIGNALS |
| static void winch_handler(int sig UNUSED_PARAM) |
| { |
| int save_errno = errno; |
| // FIXME: do it in main loop!!! |
| signal(SIGWINCH, winch_handler); |
| query_screen_dimensions(); |
| new_screen(rows, columns); // get memory for virtual screen |
| redraw(TRUE); // re-draw the screen |
| errno = save_errno; |
| } |
| static void tstp_handler(int sig UNUSED_PARAM) |
| { |
| int save_errno = errno; |
| |
| // ioctl inside cookmode() was seen to generate SIGTTOU, |
| // stopping us too early. Prevent that: |
| signal(SIGTTOU, SIG_IGN); |
| |
| go_bottom_and_clear_to_eol(); |
| cookmode(); // terminal to "cooked" |
| |
| // stop now |
| //signal(SIGTSTP, SIG_DFL); |
| //raise(SIGTSTP); |
| raise(SIGSTOP); // avoid "dance" with TSTP handler - use SIGSTOP instead |
| //signal(SIGTSTP, tstp_handler); |
| |
| // we have been "continued" with SIGCONT, restore screen and termios |
| rawmode(); // terminal to "raw" |
| last_status_cksum = 0; // force status update |
| redraw(TRUE); // re-draw the screen |
| |
| errno = save_errno; |
| } |
| static void int_handler(int sig) |
| { |
| signal(SIGINT, int_handler); |
| siglongjmp(restart, sig); |
| } |
| #endif /* FEATURE_VI_USE_SIGNALS */ |
| |
| static void do_cmd(int c); |
| |
| static int find_range(char **start, char **stop, char c) |
| { |
| char *save_dot, *p, *q, *t; |
| int cnt, multiline = 0, forward; |
| |
| save_dot = dot; |
| p = q = dot; |
| |
| // will a 'G' command move forwards or backwards? |
| forward = cmdcnt == 0 || cmdcnt > count_lines(text, 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) || (c == 'G' && !forward)) { |
| // 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) || (c == 'G' && forward)) { |
| // 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; |
| } |
| |
| //--------------------------------------------------------------------- |
| //----- the Ascii Chart ----------------------------------------------- |
| // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel |
| // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si |
| // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb |
| // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us |
| // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 ' |
| // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f / |
| // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7 |
| // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ? |
| // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G |
| // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O |
| // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W |
| // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _ |
| // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g |
| // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o |
| // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w |
| // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del |
| //--------------------------------------------------------------------- |
| |
| //----- Execute a Vi Command ----------------------------------- |
| static void do_cmd(int c) |
| { |
| char *p, *q, *save_dot; |
| char buf[12]; |
| int dir; |
| int cnt, i, j; |
| int c1; |
|