vi: fix the bug where vi never grows the edit buffer.
vi: do G trick on it function old new delta place_cursor 264 276 +12 next_tabstop 22 34 +12 mycmp 44 52 +8 status_line 34 40 +6 yank_delete 89 92 +3 what_reg 34 37 +3 suspend_sig 63 66 +3 find_range 493 496 +3 redraw 104 106 +2 cont_sig 63 65 +2 Indicate_Error 59 61 +2 status_line_bold 71 72 +1 file_insert 327 328 +1 vi_setops 1 - -1 ... cmdcnt 4 - -4 chars_to_parse 4 - -4 ccol 4 - -4 dot_scroll 88 79 -9 stupid_insert 28 18 -10 winch_sig 102 91 -11 char_insert 353 336 -17 readit 354 336 -18 get_one_char 128 110 -18 init_text_buffer 171 152 -19 text_hole_delete 132 112 -20 edit_file 940 918 -22 get_input_line 198 168 -30 show_status_line 449 408 -41 colon 3112 3067 -45 vi_main 312 250 -62 refresh 1077 974 -103 do_cmd 4818 4483 -335 ------------------------------------------------------------------------------ (add/remove: 0/38 grow/shrink: 13/20 up/down: 58/-889) Total: -831 bytes text data bss dec hex filename 809566 612 7044 817222 c7846 busybox_old 808794 611 6924 816329 c74c9 busybox_unstripped text data bss dec hex filename 18888 1 122 19011 4a43 busybox.t8/editors/vi.o 18116 0 0 18116 46c4 busybox.t9/editors/vi.o
This commit is contained in:
Denis Vlasenko
parent
b67004b2ae
commit
b175946ba4
273
editors/vi.c
273
editors/vi.c
@ -112,11 +112,19 @@ enum {
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S_END_ALNUM = 5, // used in skip_thing() for moving "dot"
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};
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/* vi.c expects chars to be unsigned. */
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/* busybox build system provides that, but it's better */
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/* to audit and fix the source */
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static smallint vi_setops;
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struct globals {
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/* many references - keep near the top of globals */
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char *text, *end; // pointers to the user data in memory
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char *dot; // where all the action takes place
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int text_size; // size of the allocated buffer
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/* the rest */
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smallint vi_setops;
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#define VI_AUTOINDENT 1
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#define VI_SHOWMATCH 2
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#define VI_IGNORECASE 4
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@ -127,83 +135,76 @@ static smallint vi_setops;
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/* indicate error with beep or flash */
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#define err_method (vi_setops & VI_ERR_METHOD)
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static smallint editing; // >0 while we are editing a file
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// [code audit says "can be 0 or 1 only"]
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static smallint cmd_mode; // 0=command 1=insert 2=replace
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static smallint file_modified; // buffer contents changed
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static smallint last_file_modified = -1;
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static int fn_start; // index of first cmd line file name
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static int save_argc; // how many file names on cmd line
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static int cmdcnt; // repetition count
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static unsigned rows, columns; // the terminal screen is this size
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static int crow, ccol; // cursor is on Crow x Ccol
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static int offset; // chars scrolled off the screen to the left
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static char *status_buffer; // mesages to the user
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#define STATUS_BUFFER_LEN 200
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static int have_status_msg; // is default edit status needed?
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// [don't make smallint!]
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static int last_status_cksum; // hash of current status line
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static char *current_filename; // current file name
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//static char *text, *end; // pointers to the user data in memory
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static char *screen; // pointer to the virtual screen buffer
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static int screensize; // and its size
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static char *screenbegin; // index into text[], of top line on the screen
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//static char *dot; // where all the action takes place
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static int tabstop;
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static char erase_char; // the users erase character
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static char last_input_char; // last char read from user
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static char last_forward_char; // last char searched for with 'f'
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#if ENABLE_FEATURE_VI_READONLY
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//static smallint vi_readonly, readonly;
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static smallint readonly_mode = 0;
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smallint readonly_mode;
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#define SET_READONLY_FILE(flags) ((flags) |= 0x01)
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#define SET_READONLY_MODE(flags) ((flags) |= 0x02)
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#define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe)
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#else
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#define readonly_mode 0
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#define SET_READONLY_FILE(flags)
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#define SET_READONLY_MODE(flags)
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#define UNSET_READONLY_FILE(flags)
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#define SET_READONLY_FILE(flags) ((void)0)
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#define SET_READONLY_MODE(flags) ((void)0)
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#define UNSET_READONLY_FILE(flags) ((void)0)
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#endif
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smallint editing; // >0 while we are editing a file
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// [code audit says "can be 0 or 1 only"]
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smallint cmd_mode; // 0=command 1=insert 2=replace
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int file_modified; // buffer contents changed (counter, not flag!)
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int last_file_modified; // = -1;
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int fn_start; // index of first cmd line file name
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int save_argc; // how many file names on cmd line
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int cmdcnt; // repetition count
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unsigned rows, columns; // the terminal screen is this size
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int crow, ccol; // cursor is on Crow x Ccol
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int offset; // chars scrolled off the screen to the left
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int have_status_msg; // is default edit status needed?
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// [don't make smallint!]
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int last_status_cksum; // hash of current status line
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char *current_filename;
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char *screenbegin; // index into text[], of top line on the screen
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char *screen; // pointer to the virtual screen buffer
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int screensize; // and its size
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int tabstop;
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char erase_char; // the users erase character
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char last_input_char; // last char read from user
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char last_forward_char; // last char searched for with 'f'
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#if ENABLE_FEATURE_VI_DOT_CMD
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static smallint adding2q; // are we currently adding user input to q
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static char *last_modifying_cmd; // [MAX_INPUT_LEN] last modifying cmd for "."
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static smallint lmc_len; // length of last_modifying_cmd
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static char *ioq, *ioq_start; // pointer to string for get_one_char to "read"
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smallint adding2q; // are we currently adding user input to q
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int lmc_len; // length of last_modifying_cmd
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char *ioq, *ioq_start; // pointer to string for get_one_char to "read"
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#endif
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#if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
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static int last_row; // where the cursor was last moved to
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int last_row; // where the cursor was last moved to
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#endif
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#if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
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static int my_pid;
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int my_pid;
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#endif
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#if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
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static char *modifying_cmds; // cmds that modify text[]
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char *modifying_cmds; // cmds that modify text[]
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#endif
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#if ENABLE_FEATURE_VI_SEARCH
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static char *last_search_pattern; // last pattern from a '/' or '?' search
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char *last_search_pattern; // last pattern from a '/' or '?' search
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#endif
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int chars_to_parse;
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/* former statics */
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#if ENABLE_FEATURE_VI_YANKMARK
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char *edit_file__cur_line;
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#endif
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int refresh__old_offset;
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int format_edit_status__tot;
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/* Moving biggest data to malloced space... */
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struct globals {
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/* many references - keep near the top of globals */
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char *text, *end; // pointers to the user data in memory
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char *dot; // where all the action takes place
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int text_size; // size of the allocated buffer
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/* a few references only */
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#if ENABLE_FEATURE_VI_YANKMARK
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int YDreg, Ureg; // default delete register and orig line for "U"
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char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
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char *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
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char *context_start, *context_end;
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#endif
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/* a few references only */
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#if ENABLE_FEATURE_VI_USE_SIGNALS
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sigjmp_buf restart; // catch_sig()
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sigjmp_buf restart; // catch_sig()
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#endif
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struct termios term_orig, term_vi; // remember what the cooked mode was
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struct termios term_orig, term_vi; // remember what the cooked mode was
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#if ENABLE_FEATURE_VI_COLON
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char *initial_cmds[3]; // currently 2 entries, NULL terminated
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#endif
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@ -214,6 +215,12 @@ struct globals {
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#else
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char readbuffer[32];
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#endif
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#define STATUS_BUFFER_LEN 200
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char status_buffer[STATUS_BUFFER_LEN]; // messages to the user
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#if ENABLE_FEATURE_VI_DOT_CMD
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char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "."
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#endif
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char get_input_line__buf[MAX_INPUT_LEN]; /* former static */
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char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2];
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};
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@ -223,6 +230,50 @@ struct globals {
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#define end (G.end )
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#define dot (G.dot )
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#define reg (G.reg )
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#define vi_setops (G.vi_setops )
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#define editing (G.editing )
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#define cmd_mode (G.cmd_mode )
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#define file_modified (G.file_modified )
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#define last_file_modified (G.last_file_modified )
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#define fn_start (G.fn_start )
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#define save_argc (G.save_argc )
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#define cmdcnt (G.cmdcnt )
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#define rows (G.rows )
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#define columns (G.columns )
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#define crow (G.crow )
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#define ccol (G.ccol )
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#define offset (G.offset )
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#define status_buffer (G.status_buffer )
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#define have_status_msg (G.have_status_msg )
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#define last_status_cksum (G.last_status_cksum )
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#define current_filename (G.current_filename )
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#define screen (G.screen )
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#define screensize (G.screensize )
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#define screenbegin (G.screenbegin )
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#define tabstop (G.tabstop )
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#define erase_char (G.erase_char )
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#define last_input_char (G.last_input_char )
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#define last_forward_char (G.last_forward_char )
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#if ENABLE_FEATURE_VI_READONLY
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#define readonly_mode (G.readonly_mode )
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#else
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#define readonly_mode 0 readonly_mode )
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#endif
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#define adding2q (G.adding2q )
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#define lmc_len (G.lmc_len )
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#define ioq (G.ioq )
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#define ioq_start (G.ioq_start )
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#define last_row (G.last_row )
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#define my_pid (G.my_pid )
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#define modifying_cmds (G.modifying_cmds )
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#define last_search_pattern (G.last_search_pattern)
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#define chars_to_parse (G.chars_to_parse )
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#define edit_file__cur_line (G.edit_file__cur_line)
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#define refresh__old_offset (G.refresh__old_offset)
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#define format_edit_status__tot (G.format_edit_status__tot)
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#define YDreg (G.YDreg )
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#define Ureg (G.Ureg )
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#define mark (G.mark )
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@ -234,10 +285,15 @@ struct globals {
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#define initial_cmds (G.initial_cmds )
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#define readbuffer (G.readbuffer )
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#define scr_out_buf (G.scr_out_buf )
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#define last_modifying_cmd (G.last_modifying_cmd )
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#define get_input_line__buf (G.get_input_line__buf)
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#define INIT_G() do { \
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SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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last_file_modified = -1; \
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} while (0)
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static int init_text_buffer(char *); // init from file or create new
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static void edit_file(char *); // edit one file
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static void do_cmd(char); // execute a command
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@ -355,22 +411,15 @@ int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int vi_main(int argc, char **argv)
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{
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int c;
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RESERVE_CONFIG_BUFFER(STATUS_BUFFER, STATUS_BUFFER_LEN);
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INIT_G();
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#if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
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my_pid = getpid();
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#endif
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INIT_G();
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#if ENABLE_FEATURE_VI_CRASHME
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srand((long) my_pid);
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#endif
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status_buffer = STATUS_BUFFER;
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last_status_cksum = 0;
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text = NULL;
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#ifdef NO_SUCH_APPLET_YET
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/* If we aren't "vi", we are "view" */
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if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) {
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@ -379,9 +428,6 @@ int vi_main(int argc, char **argv)
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#endif
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vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE;
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#if ENABLE_FEATURE_VI_YANKMARK
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memset(reg, 0, sizeof(reg)); // init the yank regs
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#endif
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#if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
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modifying_cmds = (char *) "aAcCdDiIJoOpPrRsxX<>~"; // cmds modifying text[]
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#endif
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@ -417,7 +463,6 @@ int vi_main(int argc, char **argv)
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case 'H':
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show_help();
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/* fall through */
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default:
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bb_show_usage();
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return 1;
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@ -451,9 +496,7 @@ static int init_text_buffer(char *fn)
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/* allocate/reallocate text buffer */
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free(text);
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text_size = size * 2;
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if (text_size < 10240)
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text_size = 10240; // have a minimum size for new files
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text_size = size + 10240;
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screenbegin = dot = end = text = xzalloc(text_size);
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if (fn != current_filename) {
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@ -479,15 +522,14 @@ static int init_text_buffer(char *fn)
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static void edit_file(char *fn)
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{
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#if ENABLE_FEATURE_VI_YANKMARK
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#define cur_line edit_file__cur_line
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#endif
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char c;
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int size;
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#if ENABLE_FEATURE_VI_USE_SIGNALS
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int sig;
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#endif
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#if ENABLE_FEATURE_VI_YANKMARK
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static char *cur_line;
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#endif
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editing = 1; // 0 = exit, 1 = one file, 2 = multiple files
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rawmode();
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@ -606,6 +648,7 @@ static void edit_file(char *fn)
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place_cursor(rows, 0, FALSE); // go to bottom of screen
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clear_to_eol(); // Erase to end of line
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cookmode();
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#undef cur_line
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}
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//----- The Colon commands -------------------------------------
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@ -1611,7 +1654,7 @@ static char *char_insert(char * p, char c) // insert the char c at 'p'
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c = get_one_char();
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*p = c;
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p++;
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file_modified++; // has the file been modified
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file_modified++;
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} else if (c == 27) { // Is this an ESC?
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cmd_mode = 0;
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cmdcnt = 0;
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@ -1654,12 +1697,9 @@ static char *char_insert(char * p, char c) // insert the char c at 'p'
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static char *stupid_insert(char * p, char c) // stupidly insert the char c at 'p'
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{
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p = text_hole_make(p, 1);
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if (p != 0) {
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*p = c;
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file_modified++; // has the file been modified
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p++;
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}
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return p;
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*p = c;
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//file_modified++; - done by text_hole_make()
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return p + 1;
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}
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static int find_range(char ** start, char ** stop, char c)
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@ -1842,24 +1882,21 @@ static void showmatching(char *p)
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// open a hole in text[]
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static char *text_hole_make(char * p, int size) // at "p", make a 'size' byte hole
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{
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char *src, *dest;
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int cnt;
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if (size <= 0)
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goto thm0;
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src = p;
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dest = p + size;
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cnt = end - src; // the rest of buffer
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if ( ((end + size) >= (text + text_size)) // TODO: realloc here
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|| memmove(dest, src, cnt) != dest) {
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status_line_bold("can't create room for new characters");
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p = NULL;
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goto thm0;
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return p;
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end += size; // adjust the new END
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if (end >= (text + text_size)) {
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char *new_text;
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text_size += end - (text + text_size) + 10240;
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new_text = xrealloc(text, text_size);
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screenbegin = new_text + (screenbegin - text);
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dot = new_text + (dot - text);
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end = new_text + (end - text);
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p = new_text + (p - text);
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text = new_text;
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}
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memset(p, ' ', size); // clear new hole
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end += size; // adjust the new END
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file_modified++; // has the file been modified
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thm0:
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file_modified++;
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return p;
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}
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@ -1885,16 +1922,14 @@ static char *text_hole_delete(char * p, char * q) // delete "p" through "q", inc
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goto thd0;
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if (src >= end)
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goto thd_atend; // just delete the end of the buffer
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if (memmove(dest, src, cnt) != dest) {
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status_line_bold("can't delete the character");
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}
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memmove(dest, src, cnt);
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thd_atend:
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end = end - hole_size; // adjust the new END
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if (dest >= end)
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dest = end - 1; // make sure dest in below end-1
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if (end <= text)
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dest = end = text; // keep pointers valid
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file_modified++; // has the file been modified
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file_modified++;
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thd0:
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return dest;
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}
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@ -1973,8 +2008,6 @@ static void show_help(void)
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static void start_new_cmd_q(char c)
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{
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// get buffer for new cmd
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if (!last_modifying_cmd)
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last_modifying_cmd = xzalloc(MAX_INPUT_LEN);
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// if there is a current cmd count put it in the buffer first
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if (cmdcnt > 0)
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lmc_len = sprintf(last_modifying_cmd, "%d%c", cmdcnt, c);
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@ -2164,8 +2197,6 @@ static int mysleep(int hund) // sleep for 'h' 1/100 seconds
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return safe_poll(pfd, 1, hund*10) > 0;
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}
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static int chars_to_parse;
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||||
|
||||
//----- IO Routines --------------------------------------------
|
||||
static char readit(void) // read (maybe cursor) key from stdin
|
||||
{
|
||||
@ -2300,13 +2331,11 @@ static char get_one_char(void)
|
||||
} 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;
|
||||
}
|
||||
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
|
||||
@ -2318,13 +2347,12 @@ static char get_one_char(void)
|
||||
// Get input line (uses "status line" area)
|
||||
static char *get_input_line(const char *prompt)
|
||||
{
|
||||
static char *buf; // [MAX_INPUT_LEN]
|
||||
// char [MAX_INPUT_LEN]
|
||||
#define buf get_input_line__buf
|
||||
|
||||
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
|
||||
@ -2350,6 +2378,7 @@ static char *get_input_line(const char *prompt)
|
||||
}
|
||||
refresh(FALSE);
|
||||
return buf;
|
||||
#undef buf
|
||||
}
|
||||
|
||||
static int file_size(const char *fn) // what is the byte size of "fn"
|
||||
@ -2451,7 +2480,7 @@ static int file_write(char * fn, char * first, char * last)
|
||||
ftruncate(fd, charcnt);
|
||||
if (charcnt == cnt) {
|
||||
// good write
|
||||
//file_modified = FALSE; // the file has not been modified
|
||||
//file_modified = FALSE;
|
||||
} else {
|
||||
charcnt = 0;
|
||||
}
|
||||
@ -2701,8 +2730,10 @@ static void not_implemented(const char *s)
|
||||
// show file status on status line
|
||||
static int format_edit_status(void)
|
||||
{
|
||||
static int tot;
|
||||
static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
|
||||
|
||||
#define tot format_edit_status__tot
|
||||
|
||||
int cur, percent, ret, trunc_at;
|
||||
|
||||
// file_modified is now a counter rather than a flag. this
|
||||
@ -2753,13 +2784,14 @@ static int format_edit_status(void)
|
||||
return ret; /* it all fit */
|
||||
|
||||
return trunc_at; /* had to truncate */
|
||||
#undef tot
|
||||
}
|
||||
|
||||
//----- Force refresh of all Lines -----------------------------
|
||||
static void redraw(int full_screen)
|
||||
{
|
||||
place_cursor(0, 0, FALSE); // put cursor in correct place
|
||||
clear_to_eos(); // tel terminal to erase display
|
||||
clear_to_eos(); // tell terminal to erase display
|
||||
screen_erase(); // erase the internal screen buffer
|
||||
last_status_cksum = 0; // force status update
|
||||
refresh(full_screen); // this will redraw the entire display
|
||||
@ -2831,7 +2863,7 @@ static char* format_line(char *src /*, int li*/)
|
||||
//
|
||||
static void refresh(int full_screen)
|
||||
{
|
||||
static int old_offset;
|
||||
#define old_offset refresh__old_offset
|
||||
|
||||
int li, changed;
|
||||
char *tp, *sp; // pointer into text[] and screen[]
|
||||
@ -2919,6 +2951,7 @@ static void refresh(int full_screen)
|
||||
place_cursor(crow, ccol, TRUE);
|
||||
|
||||
old_offset = offset;
|
||||
#undef old_offset
|
||||
}
|
||||
|
||||
//---------------------------------------------------------------------
|
||||
@ -3276,7 +3309,7 @@ static void do_cmd(char c)
|
||||
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) {
|
||||
if (lmc_len > 0) {
|
||||
last_modifying_cmd[lmc_len] = 0;
|
||||
ioq = ioq_start = xstrdup(last_modifying_cmd);
|
||||
}
|
||||
@ -3750,7 +3783,7 @@ static void do_cmd(char c)
|
||||
c1 = get_one_char(); // get the replacement char
|
||||
if (*dot != '\n') {
|
||||
*dot = c1;
|
||||
file_modified++; // has the file been modified
|
||||
file_modified++;
|
||||
}
|
||||
end_cmd_q(); // stop adding to q
|
||||
break;
|
||||
@ -3795,10 +3828,10 @@ static void do_cmd(char c)
|
||||
} // repeat cnt
|
||||
if (islower(*dot)) {
|
||||
*dot = toupper(*dot);
|
||||
file_modified++; // has the file been modified
|
||||
file_modified++;
|
||||
} else if (isupper(*dot)) {
|
||||
*dot = tolower(*dot);
|
||||
file_modified++; // has the file been modified
|
||||
file_modified++;
|
||||
}
|
||||
dot_right();
|
||||
end_cmd_q(); // stop adding to q
|
||||
|
||||
Loading…
Reference in New Issue
Block a user