1470 lines
24 KiB
C
1470 lines
24 KiB
C
/*
|
||
** Main editing routines for editline library.
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*/
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#include "editline.h"
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#include <signal.h>
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#include <errno.h>
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#include <ctype.h>
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/*
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** Manifest constants.
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*/
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#define SCREEN_WIDTH 80
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#define SCREEN_ROWS 24
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#define NO_ARG (-1)
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#define DEL 127
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#define CTL(x) ((x) & 0x1F)
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#define ISCTL(x) ((x) && (x) < ' ')
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#define UNCTL(x) ((x) + 64)
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#define META(x) ((x) | 0x80)
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#define ISMETA(x) ((x) & 0x80)
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#define UNMETA(x) ((x) & 0x7F)
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#if !defined(HIST_SIZE)
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#define HIST_SIZE 20
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#endif /* !defined(HIST_SIZE) */
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/*
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** Command status codes.
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*/
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typedef enum _STATUS {
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CSdone, CSeof, CSmove, CSdispatch, CSstay, CSsignal
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} STATUS;
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/*
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** The type of case-changing to perform.
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*/
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typedef enum _CASE {
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TOupper, TOlower
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} CASE;
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/*
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** Key to command mapping.
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*/
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typedef struct _KEYMAP {
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CHAR Key;
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STATUS (*Function)();
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} KEYMAP;
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/*
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** Command history structure.
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*/
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typedef struct _HISTORY {
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int Size;
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int Pos;
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CHAR *Lines[HIST_SIZE];
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} HISTORY;
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/*
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** Globals.
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*/
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int rl_eof;
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int rl_erase;
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int rl_intr;
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int rl_kill;
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int rl_quit;
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STATIC CHAR NIL[] = "";
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STATIC CONST CHAR *Input = NIL;
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STATIC CHAR *Line;
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STATIC CONST char *Prompt;
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STATIC CHAR *Yanked;
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STATIC char *Screen;
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STATIC char NEWLINE[]= CRLF;
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STATIC HISTORY H;
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STATIC int Repeat;
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STATIC int End;
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STATIC int Mark;
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STATIC int OldPoint;
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STATIC int Point;
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STATIC int PushBack;
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STATIC int Pushed;
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STATIC int Signal;
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FORWARD KEYMAP Map[33];
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FORWARD KEYMAP MetaMap[17];
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STATIC SIZE_T Length;
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STATIC SIZE_T ScreenCount;
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STATIC SIZE_T ScreenSize;
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STATIC char *backspace;
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STATIC int TTYwidth;
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STATIC int TTYrows;
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/* Display print 8-bit chars as `M-x' or as the actual 8-bit char? */
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int rl_meta_chars = 0;
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/*
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** Declarations.
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*/
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STATIC CHAR *editinput();
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extern int read();
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extern int write();
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#if defined(USE_TERMCAP)
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extern char *tgetstr();
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extern int tgetent();
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#endif /* defined(USE_TERMCAP) */
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/*
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** TTY input/output functions.
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*/
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STATIC void
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TTYflush()
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{
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if (ScreenCount) {
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(void)write(1, Screen, ScreenCount);
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ScreenCount = 0;
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}
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}
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STATIC void
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TTYput(c)
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CHAR c;
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{
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Screen[ScreenCount] = c;
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if (++ScreenCount >= ScreenSize - 1) {
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ScreenSize += SCREEN_INC;
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RENEW(Screen, char, ScreenSize);
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}
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}
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STATIC void
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TTYputs(p)
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CHAR *p;
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{
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while (*p)
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TTYput(*p++);
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}
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STATIC void
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TTYshow(c)
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CHAR c;
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{
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if (c == DEL) {
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TTYput('^');
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TTYput('?');
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}
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else if (ISCTL(c)) {
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TTYput('^');
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TTYput(UNCTL(c));
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}
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else if (rl_meta_chars && ISMETA(c)) {
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TTYput('M');
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TTYput('-');
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TTYput(UNMETA(c));
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}
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else
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TTYput(c);
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}
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STATIC void
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TTYstring(p)
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CHAR *p;
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{
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while (*p)
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TTYshow(*p++);
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}
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STATIC unsigned int
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TTYget()
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{
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CHAR c;
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int r;
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TTYflush();
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if (Pushed) {
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Pushed = 0;
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return PushBack;
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}
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if (*Input)
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return *Input++;
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do
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{
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r= read(0, &c, (SIZE_T)1);
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} while (r == -1 && errno == EINTR);
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return r == 1 ? c : EOF;
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}
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#define TTYback() (backspace ? TTYputs((CHAR *)backspace) : TTYput('\b'))
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STATIC void
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TTYbackn(n)
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int n;
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{
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while (--n >= 0)
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TTYback();
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}
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STATIC void
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TTYinfo()
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{
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static int init;
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#if defined(USE_TERMCAP)
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char *term;
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char buff[2048];
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char *bp;
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#endif /* defined(USE_TERMCAP) */
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#if defined(TIOCGWINSZ)
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struct winsize W;
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#endif /* defined(TIOCGWINSZ) */
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if (init) {
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#if defined(TIOCGWINSZ)
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/* Perhaps we got resized. */
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if (ioctl(0, TIOCGWINSZ, &W) >= 0
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&& W.ws_col > 0 && W.ws_row > 0) {
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TTYwidth = (int)W.ws_col;
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TTYrows = (int)W.ws_row;
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}
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#endif /* defined(TIOCGWINSZ) */
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return;
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}
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init++;
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TTYwidth = TTYrows = 0;
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#if defined(USE_TERMCAP)
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bp = &buff[0];
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if ((term = getenv("TERM")) == NULL)
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term = "dumb";
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if (tgetent(buff, term) < 0) {
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TTYwidth = SCREEN_WIDTH;
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TTYrows = SCREEN_ROWS;
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return;
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}
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if ((backspace = tgetstr("le", &bp)) != NULL)
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backspace = strdup(backspace);
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TTYwidth = tgetnum("co");
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TTYrows = tgetnum("li");
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#endif /* defined(USE_TERMCAP) */
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#if defined(TIOCGWINSZ)
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if (ioctl(0, TIOCGWINSZ, &W) >= 0) {
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TTYwidth = (int)W.ws_col;
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TTYrows = (int)W.ws_row;
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}
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#endif /* defined(TIOCGWINSZ) */
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if (TTYwidth <= 0 || TTYrows <= 0) {
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TTYwidth = SCREEN_WIDTH;
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TTYrows = SCREEN_ROWS;
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}
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}
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/*
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** Print an array of words in columns.
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*/
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STATIC void
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columns(ac, av)
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int ac;
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CHAR **av;
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{
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CHAR *p;
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int i;
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int j;
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int k;
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int len;
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int skip;
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int longest;
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int cols;
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/* Find longest name, determine column count from that. */
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for (longest = 0, i = 0; i < ac; i++)
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if ((j = strlen((char *)av[i])) > longest)
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longest = j;
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cols = TTYwidth / (longest + 3);
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TTYputs((CHAR *)NEWLINE);
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for (skip = ac / cols + 1, i = 0; i < skip; i++) {
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for (j = i; j < ac; j += skip) {
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for (p = av[j], len = strlen((char *)p), k = len; --k >= 0; p++)
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TTYput(*p);
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if (j + skip < ac)
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while (++len < longest + 3)
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TTYput(' ');
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}
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TTYputs((CHAR *)NEWLINE);
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}
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}
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STATIC void
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reposition()
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{
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int i;
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CHAR *p;
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TTYput('\r');
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TTYputs((CONST CHAR *)Prompt);
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for (i = Point, p = Line; --i >= 0; p++)
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TTYshow(*p);
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}
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STATIC void
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left(Change)
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STATUS Change;
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{
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TTYback();
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if (Point) {
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if (ISCTL(Line[Point - 1]))
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TTYback();
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else if (rl_meta_chars && ISMETA(Line[Point - 1])) {
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TTYback();
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TTYback();
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}
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}
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if (Change == CSmove)
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Point--;
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}
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STATIC void
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right(Change)
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STATUS Change;
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{
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TTYshow(Line[Point]);
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if (Change == CSmove)
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Point++;
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}
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STATIC STATUS
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ring_bell()
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{
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TTYput('\07');
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TTYflush();
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return CSstay;
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}
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STATIC STATUS
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do_macro(c)
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unsigned int c;
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{
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CHAR name[4];
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name[0] = '_';
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name[1] = c;
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name[2] = '_';
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name[3] = '\0';
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if ((Input = (CHAR *)getenv((char *)name)) == NULL) {
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Input = NIL;
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return ring_bell();
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}
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return CSstay;
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}
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STATIC STATUS
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do_forward(move)
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STATUS move;
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{
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int i;
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CHAR *p;
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i = 0;
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do {
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p = &Line[Point];
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for ( ; Point < End && (*p == ' ' || !isalnum(*p)); Point++, p++)
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if (move == CSmove)
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right(CSstay);
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for (; Point < End && isalnum(*p); Point++, p++)
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if (move == CSmove)
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right(CSstay);
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if (Point == End)
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break;
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} while (++i < Repeat);
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return CSstay;
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}
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STATIC STATUS
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do_case(type)
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CASE type;
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{
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int i;
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int end;
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int count;
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CHAR *p;
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||
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(void)do_forward(CSstay);
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if (OldPoint != Point) {
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if ((count = Point - OldPoint) < 0)
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count = -count;
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Point = OldPoint;
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if ((end = Point + count) > End)
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end = End;
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for (i = Point, p = &Line[i]; i < end; i++, p++) {
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if (type == TOupper) {
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if (islower(*p))
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*p = toupper(*p);
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}
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else if (isupper(*p))
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*p = tolower(*p);
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right(CSmove);
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}
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}
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return CSstay;
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}
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STATIC STATUS
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case_down_word()
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{
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return do_case(TOlower);
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}
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STATIC STATUS
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case_up_word()
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{
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return do_case(TOupper);
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}
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|
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STATIC void
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||
ceol()
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{
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int extras;
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int i;
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CHAR *p;
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||
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for (extras = 0, i = Point, p = &Line[i]; i <= End; i++, p++) {
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TTYput(' ');
|
||
if (ISCTL(*p)) {
|
||
TTYput(' ');
|
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extras++;
|
||
}
|
||
else if (rl_meta_chars && ISMETA(*p)) {
|
||
TTYput(' ');
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||
TTYput(' ');
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extras += 2;
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||
}
|
||
}
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||
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for (i += extras; i > Point; i--)
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TTYback();
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||
}
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||
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STATIC void
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||
clear_line()
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{
|
||
Point = -strlen(Prompt);
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TTYput('\r');
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ceol();
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Point = 0;
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End = 0;
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Line[0] = '\0';
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}
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||
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STATIC STATUS
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||
insert_string(p)
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CHAR *p;
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{
|
||
SIZE_T len;
|
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int i;
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CHAR *new;
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CHAR *q;
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||
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len = strlen((char *)p);
|
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if (End + len >= Length) {
|
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if ((new = NEW(CHAR, Length + len + MEM_INC)) == NULL)
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return CSstay;
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if (Length) {
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COPYFROMTO(new, Line, Length);
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DISPOSE(Line);
|
||
}
|
||
Line = new;
|
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Length += len + MEM_INC;
|
||
}
|
||
|
||
for (q = &Line[Point], i = End - Point; --i >= 0; )
|
||
q[len + i] = q[i];
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COPYFROMTO(&Line[Point], p, len);
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End += len;
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||
Line[End] = '\0';
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TTYstring(&Line[Point]);
|
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Point += len;
|
||
|
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return Point == End ? CSstay : CSmove;
|
||
}
|
||
|
||
STATIC STATUS
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||
redisplay()
|
||
{
|
||
TTYputs((CONST CHAR *)NEWLINE);
|
||
TTYputs((CONST CHAR *)Prompt);
|
||
TTYstring(Line);
|
||
return CSmove;
|
||
}
|
||
|
||
STATIC STATUS
|
||
toggle_meta_mode()
|
||
{
|
||
rl_meta_chars = ! rl_meta_chars;
|
||
return redisplay();
|
||
}
|
||
|
||
|
||
STATIC CHAR *
|
||
next_hist()
|
||
{
|
||
return H.Pos >= H.Size - 1 ? NULL : H.Lines[++H.Pos];
|
||
}
|
||
|
||
STATIC CHAR *
|
||
prev_hist()
|
||
{
|
||
return H.Pos == 0 ? NULL : H.Lines[--H.Pos];
|
||
}
|
||
|
||
STATIC STATUS
|
||
do_insert_hist(p)
|
||
CHAR *p;
|
||
{
|
||
if (p == NULL)
|
||
return ring_bell();
|
||
Point = 0;
|
||
reposition();
|
||
ceol();
|
||
End = 0;
|
||
return insert_string(p);
|
||
}
|
||
|
||
STATIC STATUS
|
||
do_hist(move)
|
||
CHAR *(*move)();
|
||
{
|
||
CHAR *p;
|
||
int i;
|
||
|
||
i = 0;
|
||
do {
|
||
if ((p = (*move)()) == NULL)
|
||
return ring_bell();
|
||
} while (++i < Repeat);
|
||
return do_insert_hist(p);
|
||
}
|
||
|
||
STATIC STATUS
|
||
h_next()
|
||
{
|
||
return do_hist(next_hist);
|
||
}
|
||
|
||
STATIC STATUS
|
||
h_prev()
|
||
{
|
||
return do_hist(prev_hist);
|
||
}
|
||
|
||
STATIC STATUS
|
||
h_first()
|
||
{
|
||
return do_insert_hist(H.Lines[H.Pos = 0]);
|
||
}
|
||
|
||
STATIC STATUS
|
||
h_last()
|
||
{
|
||
return do_insert_hist(H.Lines[H.Pos = H.Size - 1]);
|
||
}
|
||
|
||
/*
|
||
** Return zero if pat appears as a substring in text.
|
||
*/
|
||
STATIC int
|
||
substrcmp(text, pat, len)
|
||
char *text;
|
||
char *pat;
|
||
int len;
|
||
{
|
||
char c;
|
||
|
||
if ((c = *pat) == '\0')
|
||
return *text == '\0';
|
||
for ( ; *text; text++)
|
||
if (*text == c && strncmp(text, pat, len) == 0)
|
||
return 0;
|
||
return 1;
|
||
}
|
||
|
||
STATIC CHAR *
|
||
search_hist(search, move)
|
||
CHAR *search;
|
||
CHAR *(*move)();
|
||
{
|
||
static CHAR *old_search;
|
||
int len;
|
||
int pos;
|
||
int (*match)();
|
||
char *pat;
|
||
|
||
/* Save or get remembered search pattern. */
|
||
if (search && *search) {
|
||
if (old_search)
|
||
DISPOSE(old_search);
|
||
old_search = (CHAR *)strdup((char *)search);
|
||
}
|
||
else {
|
||
if (old_search == NULL || *old_search == '\0')
|
||
return NULL;
|
||
search = old_search;
|
||
}
|
||
|
||
/* Set up pattern-finder. */
|
||
if (*search == '^') {
|
||
match = strncmp;
|
||
pat = (char *)(search + 1);
|
||
}
|
||
else {
|
||
match = substrcmp;
|
||
pat = (char *)search;
|
||
}
|
||
len = strlen(pat);
|
||
|
||
for (pos = H.Pos; (*move)() != NULL; )
|
||
if ((*match)((char *)H.Lines[H.Pos], pat, len) == 0)
|
||
return H.Lines[H.Pos];
|
||
H.Pos = pos;
|
||
return NULL;
|
||
}
|
||
|
||
STATIC STATUS
|
||
h_search()
|
||
{
|
||
static int Searching;
|
||
CONST char *old_prompt;
|
||
CHAR *(*move)();
|
||
CHAR *p;
|
||
|
||
if (Searching)
|
||
return ring_bell();
|
||
Searching = 1;
|
||
|
||
clear_line();
|
||
old_prompt = Prompt;
|
||
Prompt = "Search: ";
|
||
TTYputs((CONST CHAR *)Prompt);
|
||
move = Repeat == NO_ARG ? prev_hist : next_hist;
|
||
p = editinput();
|
||
Prompt = old_prompt;
|
||
Searching = 0;
|
||
TTYputs((CONST CHAR *)Prompt);
|
||
if (p == NULL && Signal > 0) {
|
||
Signal = 0;
|
||
clear_line();
|
||
return redisplay();
|
||
}
|
||
p = search_hist(p, move);
|
||
clear_line();
|
||
if (p == NULL) {
|
||
(void)ring_bell();
|
||
return redisplay();
|
||
}
|
||
return do_insert_hist(p);
|
||
}
|
||
|
||
STATIC STATUS
|
||
fd_char()
|
||
{
|
||
int i;
|
||
|
||
i = 0;
|
||
do {
|
||
if (Point >= End)
|
||
break;
|
||
right(CSmove);
|
||
} while (++i < Repeat);
|
||
return CSstay;
|
||
}
|
||
|
||
STATIC void
|
||
save_yank(begin, i)
|
||
int begin;
|
||
int i;
|
||
{
|
||
if (Yanked) {
|
||
DISPOSE(Yanked);
|
||
Yanked = NULL;
|
||
}
|
||
|
||
if (i < 1)
|
||
return;
|
||
|
||
if ((Yanked = NEW(CHAR, (SIZE_T)i + 1)) != NULL) {
|
||
COPYFROMTO(Yanked, &Line[begin], i);
|
||
Yanked[i] = '\0';
|
||
}
|
||
}
|
||
|
||
STATIC STATUS
|
||
delete_string(count)
|
||
int count;
|
||
{
|
||
int i;
|
||
CHAR *p;
|
||
|
||
if (count <= 0 || End == Point)
|
||
return ring_bell();
|
||
|
||
if (count == 1 && Point == End - 1) {
|
||
/* Optimize common case of delete at end of line. */
|
||
End--;
|
||
p = &Line[Point];
|
||
i = 1;
|
||
TTYput(' ');
|
||
if (ISCTL(*p)) {
|
||
i = 2;
|
||
TTYput(' ');
|
||
}
|
||
else if (rl_meta_chars && ISMETA(*p)) {
|
||
i = 3;
|
||
TTYput(' ');
|
||
TTYput(' ');
|
||
}
|
||
TTYbackn(i);
|
||
*p = '\0';
|
||
return CSmove;
|
||
}
|
||
if (Point + count > End && (count = End - Point) <= 0)
|
||
return CSstay;
|
||
|
||
if (count > 1)
|
||
save_yank(Point, count);
|
||
|
||
for (p = &Line[Point], i = End - (Point + count) + 1; --i >= 0; p++)
|
||
p[0] = p[count];
|
||
ceol();
|
||
End -= count;
|
||
TTYstring(&Line[Point]);
|
||
return CSmove;
|
||
}
|
||
|
||
STATIC STATUS
|
||
bk_char()
|
||
{
|
||
int i;
|
||
|
||
i = 0;
|
||
do {
|
||
if (Point == 0)
|
||
break;
|
||
left(CSmove);
|
||
} while (++i < Repeat);
|
||
|
||
return CSstay;
|
||
}
|
||
|
||
STATIC STATUS
|
||
bk_del_char()
|
||
{
|
||
int i;
|
||
|
||
i = 0;
|
||
do {
|
||
if (Point == 0)
|
||
break;
|
||
left(CSmove);
|
||
} while (++i < Repeat);
|
||
|
||
return delete_string(i);
|
||
}
|
||
|
||
STATIC STATUS
|
||
kill_line()
|
||
{
|
||
int i;
|
||
|
||
if (Repeat != NO_ARG) {
|
||
if (Repeat < Point) {
|
||
i = Point;
|
||
Point = Repeat;
|
||
reposition();
|
||
(void)delete_string(i - Point);
|
||
}
|
||
else if (Repeat > Point) {
|
||
right(CSmove);
|
||
(void)delete_string(Repeat - Point - 1);
|
||
}
|
||
return CSmove;
|
||
}
|
||
|
||
save_yank(Point, End - Point);
|
||
Line[Point] = '\0';
|
||
ceol();
|
||
End = Point;
|
||
return CSstay;
|
||
}
|
||
|
||
STATIC STATUS
|
||
insert_char(c)
|
||
int c;
|
||
{
|
||
STATUS s;
|
||
CHAR buff[2];
|
||
CHAR *p;
|
||
CHAR *q;
|
||
int i;
|
||
|
||
if (Repeat == NO_ARG || Repeat < 2) {
|
||
buff[0] = c;
|
||
buff[1] = '\0';
|
||
return insert_string(buff);
|
||
}
|
||
|
||
if ((p = NEW(CHAR, Repeat + 1)) == NULL)
|
||
return CSstay;
|
||
for (i = Repeat, q = p; --i >= 0; )
|
||
*q++ = c;
|
||
*q = '\0';
|
||
Repeat = 0;
|
||
s = insert_string(p);
|
||
DISPOSE(p);
|
||
return s;
|
||
}
|
||
|
||
STATIC STATUS
|
||
meta()
|
||
{
|
||
unsigned int c;
|
||
KEYMAP *kp;
|
||
|
||
if ((c = TTYget()) == EOF)
|
||
return CSeof;
|
||
#if defined(ANSI_ARROWS)
|
||
/* Also include VT-100 arrows. */
|
||
if (c == '[' || c == 'O')
|
||
switch (c = TTYget()) {
|
||
default: return ring_bell();
|
||
case EOF: return CSeof;
|
||
case 'A': return h_prev();
|
||
case 'B': return h_next();
|
||
case 'C': return fd_char();
|
||
case 'D': return bk_char();
|
||
}
|
||
#endif /* defined(ANSI_ARROWS) */
|
||
|
||
if (isdigit(c)) {
|
||
for (Repeat = c - '0'; (c = TTYget()) != EOF && isdigit(c); )
|
||
Repeat = Repeat * 10 + c - '0';
|
||
Pushed = 1;
|
||
PushBack = c;
|
||
return CSstay;
|
||
}
|
||
|
||
if (isupper(c))
|
||
return do_macro(c);
|
||
for (kp = MetaMap; kp->Function; kp++)
|
||
if (kp->Key == c)
|
||
return (*kp->Function)();
|
||
|
||
return ring_bell();
|
||
}
|
||
|
||
STATIC STATUS
|
||
emacs(c)
|
||
unsigned int c;
|
||
{
|
||
STATUS s;
|
||
KEYMAP *kp;
|
||
|
||
OldPoint = Point;
|
||
if (rl_meta_chars && ISMETA(c)) {
|
||
Pushed = 1;
|
||
PushBack = UNMETA(c);
|
||
return meta();
|
||
}
|
||
for (kp = Map; kp->Function; kp++)
|
||
if (kp->Key == c)
|
||
break;
|
||
s = kp->Function ? (*kp->Function)() : insert_char((int)c);
|
||
if (!Pushed)
|
||
/* No pushback means no repeat count; hacky, but true. */
|
||
Repeat = NO_ARG;
|
||
return s;
|
||
}
|
||
|
||
STATIC STATUS
|
||
TTYspecial(c)
|
||
unsigned int c;
|
||
{
|
||
if (ISMETA(c))
|
||
return CSdispatch;
|
||
|
||
if (c == rl_erase || c == DEL)
|
||
return bk_del_char();
|
||
if (c == rl_kill) {
|
||
if (Point != 0) {
|
||
Point = 0;
|
||
reposition();
|
||
}
|
||
Repeat = NO_ARG;
|
||
return kill_line();
|
||
}
|
||
if (c == rl_eof && Point == 0 && End == 0)
|
||
return CSeof;
|
||
if (c == rl_intr) {
|
||
Signal = SIGINT;
|
||
return CSsignal;
|
||
}
|
||
if (c == rl_quit) {
|
||
Signal = SIGQUIT;
|
||
return CSeof;
|
||
}
|
||
|
||
return CSdispatch;
|
||
}
|
||
|
||
STATIC CHAR *
|
||
editinput()
|
||
{
|
||
unsigned int c;
|
||
|
||
Repeat = NO_ARG;
|
||
OldPoint = Point = Mark = End = 0;
|
||
Line[0] = '\0';
|
||
|
||
Signal = -1;
|
||
while ((c = TTYget()) != EOF)
|
||
switch (TTYspecial(c)) {
|
||
case CSdone:
|
||
return Line;
|
||
case CSeof:
|
||
return NULL;
|
||
case CSsignal:
|
||
return (CHAR *)"";
|
||
case CSmove:
|
||
reposition();
|
||
break;
|
||
case CSdispatch:
|
||
switch (emacs(c)) {
|
||
case CSdone:
|
||
return Line;
|
||
case CSeof:
|
||
return NULL;
|
||
case CSsignal:
|
||
return (CHAR *)"";
|
||
case CSmove:
|
||
reposition();
|
||
break;
|
||
case CSdispatch:
|
||
case CSstay:
|
||
break;
|
||
}
|
||
break;
|
||
case CSstay:
|
||
break;
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
STATIC void
|
||
hist_add(p)
|
||
CHAR *p;
|
||
{
|
||
int i;
|
||
|
||
if ((p = (CHAR *)strdup((char *)p)) == NULL)
|
||
return;
|
||
if (H.Size < HIST_SIZE)
|
||
H.Lines[H.Size++] = p;
|
||
else {
|
||
DISPOSE(H.Lines[0]);
|
||
for (i = 0; i < HIST_SIZE - 1; i++)
|
||
H.Lines[i] = H.Lines[i + 1];
|
||
H.Lines[i] = p;
|
||
}
|
||
H.Pos = H.Size - 1;
|
||
}
|
||
|
||
/*
|
||
** For compatibility with FSF readline.
|
||
*/
|
||
/* ARGSUSED0 */
|
||
void
|
||
rl_reset_terminal(p)
|
||
char *p;
|
||
{
|
||
}
|
||
|
||
void
|
||
rl_initialize()
|
||
{
|
||
}
|
||
|
||
char *
|
||
readline(prompt)
|
||
CONST char *prompt;
|
||
{
|
||
CHAR *line;
|
||
int s;
|
||
|
||
if (Line == NULL) {
|
||
Length = MEM_INC;
|
||
if ((Line = NEW(CHAR, Length)) == NULL)
|
||
return NULL;
|
||
}
|
||
|
||
TTYinfo();
|
||
rl_ttyset(0);
|
||
hist_add(NIL);
|
||
ScreenSize = SCREEN_INC;
|
||
Screen = NEW(char, ScreenSize);
|
||
Prompt = prompt ? prompt : (char *)NIL;
|
||
TTYputs((CONST CHAR *)Prompt);
|
||
if ((line = editinput()) != NULL) {
|
||
line = (CHAR *)strdup((char *)line);
|
||
TTYputs((CHAR *)NEWLINE);
|
||
TTYflush();
|
||
}
|
||
rl_ttyset(1);
|
||
DISPOSE(Screen);
|
||
DISPOSE(H.Lines[--H.Size]);
|
||
|
||
if (line != NULL && *line != '\0'
|
||
#if defined(UNIQUE_HISTORY)
|
||
&& !(H.Pos && strcmp((char *) line, (char *) H.Lines[H.Pos - 1]) == 0)
|
||
#endif /* defined(UNIQUE_HISTORY) */
|
||
&& !(H.Size && strcmp((char *) line, (char *) H.Lines[H.Size - 1]) == 0)
|
||
) {
|
||
hist_add(line);
|
||
}
|
||
|
||
if (Signal > 0) {
|
||
s = Signal;
|
||
Signal = 0;
|
||
(void)kill(getpid(), s);
|
||
}
|
||
return (char *)line;
|
||
}
|
||
|
||
void
|
||
add_history(p)
|
||
char *p;
|
||
{
|
||
#ifdef obsolete /* Made part of readline(). -- kjb */
|
||
if (p == NULL || *p == '\0')
|
||
return;
|
||
|
||
#if defined(UNIQUE_HISTORY)
|
||
if (H.Pos && strcmp(p, (char *) H.Lines[H.Pos - 1]) == 0)
|
||
return;
|
||
#endif /* defined(UNIQUE_HISTORY) */
|
||
if (H.Size && strcmp(p, (char *) H.Lines[H.Size - 1]) == 0)
|
||
return;
|
||
hist_add((CHAR *)p);
|
||
#endif
|
||
}
|
||
|
||
|
||
STATIC STATUS
|
||
beg_line()
|
||
{
|
||
if (Point) {
|
||
Point = 0;
|
||
return CSmove;
|
||
}
|
||
return CSstay;
|
||
}
|
||
|
||
STATIC STATUS
|
||
del_char()
|
||
{
|
||
return delete_string(Repeat == NO_ARG ? 1 : Repeat);
|
||
}
|
||
|
||
STATIC STATUS
|
||
end_line()
|
||
{
|
||
if (Point != End) {
|
||
Point = End;
|
||
return CSmove;
|
||
}
|
||
return CSstay;
|
||
}
|
||
|
||
STATIC char SEPS[] = "\"#$&'()*:;<=>?[\\]^`{|}~\n\t ";
|
||
|
||
/*
|
||
** Move back to the beginning of the current word and return an
|
||
** allocated copy of it.
|
||
*/
|
||
STATIC CHAR *
|
||
find_word()
|
||
{
|
||
CHAR *p, *q;
|
||
CHAR *new;
|
||
SIZE_T len;
|
||
|
||
p = &Line[Point];
|
||
while (p > Line) {
|
||
p--;
|
||
if (p > Line && p[-1] == '\\') {
|
||
p--;
|
||
} else {
|
||
if (strchr(SEPS, (char) *p) != NULL) {
|
||
p++;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
len = Point - (p - Line) + 1;
|
||
if ((new = NEW(CHAR, len)) == NULL)
|
||
return NULL;
|
||
q = new;
|
||
while (p < &Line[Point]) {
|
||
if (*p == '\\') {
|
||
if (++p == &Line[Point]) break;
|
||
}
|
||
*q++ = *p++;
|
||
}
|
||
*q = '\0';
|
||
return new;
|
||
}
|
||
|
||
STATIC STATUS
|
||
c_possible()
|
||
{
|
||
CHAR **av;
|
||
CHAR *word;
|
||
int ac;
|
||
|
||
word = find_word();
|
||
ac = rl_list_possib((char *)word, (char ***)&av);
|
||
if (word)
|
||
DISPOSE(word);
|
||
if (ac) {
|
||
columns(ac, av);
|
||
while (--ac >= 0)
|
||
DISPOSE(av[ac]);
|
||
DISPOSE(av);
|
||
return CSmove;
|
||
}
|
||
return ring_bell();
|
||
}
|
||
|
||
STATIC STATUS
|
||
c_complete()
|
||
{
|
||
CHAR *p, *q;
|
||
CHAR *word, *new;
|
||
SIZE_T len;
|
||
int unique;
|
||
STATUS s;
|
||
|
||
word = find_word();
|
||
p = (CHAR *)rl_complete((char *)word, &unique);
|
||
if (word)
|
||
DISPOSE(word);
|
||
if (p) {
|
||
len = strlen((char *)p);
|
||
word = p;
|
||
new = q = NEW(CHAR, 2 * len + 1);
|
||
while (*p) {
|
||
if ((*p < ' ' || strchr(SEPS, (char) *p) != NULL)
|
||
&& (!unique || p[1] != 0)) {
|
||
*q++ = '\\';
|
||
}
|
||
*q++ = *p++;
|
||
}
|
||
*q = '\0';
|
||
DISPOSE(word);
|
||
if (len > 0) {
|
||
s = insert_string(new);
|
||
#if ANNOYING_NOISE
|
||
if (!unique)
|
||
(void)ring_bell();
|
||
#endif
|
||
}
|
||
DISPOSE(new);
|
||
if (len > 0) return s;
|
||
}
|
||
return c_possible();
|
||
}
|
||
|
||
STATIC STATUS
|
||
accept_line()
|
||
{
|
||
Line[End] = '\0';
|
||
return CSdone;
|
||
}
|
||
|
||
STATIC STATUS
|
||
transpose()
|
||
{
|
||
CHAR c;
|
||
|
||
if (Point) {
|
||
if (Point == End)
|
||
left(CSmove);
|
||
c = Line[Point - 1];
|
||
left(CSstay);
|
||
Line[Point - 1] = Line[Point];
|
||
TTYshow(Line[Point - 1]);
|
||
Line[Point++] = c;
|
||
TTYshow(c);
|
||
}
|
||
return CSstay;
|
||
}
|
||
|
||
STATIC STATUS
|
||
quote()
|
||
{
|
||
unsigned int c;
|
||
|
||
return (c = TTYget()) == EOF ? CSeof : insert_char((int)c);
|
||
}
|
||
|
||
STATIC STATUS
|
||
wipe()
|
||
{
|
||
int i;
|
||
|
||
if (Mark > End)
|
||
return ring_bell();
|
||
|
||
if (Point > Mark) {
|
||
i = Point;
|
||
Point = Mark;
|
||
Mark = i;
|
||
reposition();
|
||
}
|
||
|
||
return delete_string(Mark - Point);
|
||
}
|
||
|
||
STATIC STATUS
|
||
mk_set()
|
||
{
|
||
Mark = Point;
|
||
return CSstay;
|
||
}
|
||
|
||
STATIC STATUS
|
||
exchange()
|
||
{
|
||
unsigned int c;
|
||
|
||
if ((c = TTYget()) != CTL('X'))
|
||
return c == EOF ? CSeof : ring_bell();
|
||
|
||
if ((c = Mark) <= End) {
|
||
Mark = Point;
|
||
Point = c;
|
||
return CSmove;
|
||
}
|
||
return CSstay;
|
||
}
|
||
|
||
STATIC STATUS
|
||
yank()
|
||
{
|
||
if (Yanked && *Yanked)
|
||
return insert_string(Yanked);
|
||
return CSstay;
|
||
}
|
||
|
||
STATIC STATUS
|
||
copy_region()
|
||
{
|
||
if (Mark > End)
|
||
return ring_bell();
|
||
|
||
if (Point > Mark)
|
||
save_yank(Mark, Point - Mark);
|
||
else
|
||
save_yank(Point, Mark - Point);
|
||
|
||
return CSstay;
|
||
}
|
||
|
||
STATIC STATUS
|
||
move_to_char()
|
||
{
|
||
unsigned int c;
|
||
int i;
|
||
CHAR *p;
|
||
|
||
if ((c = TTYget()) == EOF)
|
||
return CSeof;
|
||
for (i = Point + 1, p = &Line[i]; i < End; i++, p++)
|
||
if (*p == c) {
|
||
Point = i;
|
||
return CSmove;
|
||
}
|
||
return CSstay;
|
||
}
|
||
|
||
STATIC STATUS
|
||
fd_word()
|
||
{
|
||
return do_forward(CSmove);
|
||
}
|
||
|
||
STATIC STATUS
|
||
fd_kill_word()
|
||
{
|
||
int i;
|
||
|
||
(void)do_forward(CSstay);
|
||
if (OldPoint != Point) {
|
||
i = Point - OldPoint;
|
||
Point = OldPoint;
|
||
return delete_string(i);
|
||
}
|
||
return CSstay;
|
||
}
|
||
|
||
STATIC STATUS
|
||
bk_word()
|
||
{
|
||
int i;
|
||
CHAR *p;
|
||
|
||
i = 0;
|
||
do {
|
||
for (p = &Line[Point]; p > Line && !isalnum(p[-1]); p--)
|
||
left(CSmove);
|
||
|
||
for (; p > Line && p[-1] != ' ' && isalnum(p[-1]); p--)
|
||
left(CSmove);
|
||
|
||
if (Point == 0)
|
||
break;
|
||
} while (++i < Repeat);
|
||
|
||
return CSstay;
|
||
}
|
||
|
||
STATIC STATUS
|
||
bk_kill_word()
|
||
{
|
||
(void)bk_word();
|
||
if (OldPoint != Point)
|
||
return delete_string(OldPoint - Point);
|
||
return CSstay;
|
||
}
|
||
|
||
STATIC int
|
||
argify(line, avp)
|
||
CHAR *line;
|
||
CHAR ***avp;
|
||
{
|
||
CHAR *c;
|
||
CHAR **p;
|
||
CHAR **new;
|
||
int ac;
|
||
int i;
|
||
|
||
i = MEM_INC;
|
||
if ((*avp = p = NEW(CHAR*, i))== NULL)
|
||
return 0;
|
||
|
||
for (c = line; isspace(*c); c++)
|
||
continue;
|
||
if (*c == '\n' || *c == '\0')
|
||
return 0;
|
||
|
||
for (ac = 0, p[ac++] = c; *c && *c != '\n'; ) {
|
||
if (isspace(*c)) {
|
||
*c++ = '\0';
|
||
if (*c && *c != '\n') {
|
||
if (ac + 1 == i) {
|
||
new = NEW(CHAR*, i + MEM_INC);
|
||
if (new == NULL) {
|
||
p[ac] = NULL;
|
||
return ac;
|
||
}
|
||
COPYFROMTO(new, p, i * sizeof (char **));
|
||
i += MEM_INC;
|
||
DISPOSE(p);
|
||
*avp = p = new;
|
||
}
|
||
p[ac++] = c;
|
||
}
|
||
}
|
||
else
|
||
c++;
|
||
}
|
||
*c = '\0';
|
||
p[ac] = NULL;
|
||
return ac;
|
||
}
|
||
|
||
STATIC STATUS
|
||
last_argument()
|
||
{
|
||
CHAR **av;
|
||
CHAR *p;
|
||
STATUS s;
|
||
int ac;
|
||
|
||
if (H.Size == 1 || (p = H.Lines[H.Size - 2]) == NULL)
|
||
return ring_bell();
|
||
|
||
if ((p = (CHAR *)strdup((char *)p)) == NULL)
|
||
return CSstay;
|
||
ac = argify(p, &av);
|
||
|
||
if (Repeat != NO_ARG)
|
||
s = Repeat < ac ? insert_string(av[Repeat]) : ring_bell();
|
||
else
|
||
s = ac ? insert_string(av[ac - 1]) : CSstay;
|
||
|
||
if (ac)
|
||
DISPOSE(av);
|
||
DISPOSE(p);
|
||
return s;
|
||
}
|
||
|
||
STATIC KEYMAP Map[33] = {
|
||
{ CTL('@'), mk_set },
|
||
{ CTL('A'), beg_line },
|
||
{ CTL('B'), bk_char },
|
||
{ CTL('D'), del_char },
|
||
{ CTL('E'), end_line },
|
||
{ CTL('F'), fd_char },
|
||
{ CTL('G'), ring_bell },
|
||
{ CTL('H'), bk_del_char },
|
||
{ CTL('I'), c_complete },
|
||
{ CTL('J'), accept_line },
|
||
{ CTL('K'), kill_line },
|
||
{ CTL('L'), redisplay },
|
||
{ CTL('M'), accept_line },
|
||
{ CTL('N'), h_next },
|
||
{ CTL('O'), ring_bell },
|
||
{ CTL('P'), h_prev },
|
||
{ CTL('Q'), ring_bell },
|
||
{ CTL('R'), h_search },
|
||
{ CTL('S'), ring_bell },
|
||
{ CTL('T'), transpose },
|
||
{ CTL('U'), ring_bell },
|
||
{ CTL('V'), quote },
|
||
{ CTL('W'), bk_kill_word },
|
||
{ CTL('X'), exchange },
|
||
{ CTL('Y'), yank },
|
||
{ CTL('Z'), end_line },
|
||
{ CTL('['), meta },
|
||
{ CTL(']'), move_to_char },
|
||
{ CTL('^'), ring_bell },
|
||
{ CTL('_'), ring_bell },
|
||
{ 0, NULL }
|
||
};
|
||
|
||
STATIC KEYMAP MetaMap[17]= {
|
||
{ CTL('H'), wipe },
|
||
{ DEL, wipe },
|
||
{ ' ', mk_set },
|
||
{ '.', last_argument },
|
||
{ '<', h_first },
|
||
{ '>', h_last },
|
||
{ '?', c_possible },
|
||
{ 'b', bk_word },
|
||
{ 'd', fd_kill_word },
|
||
{ 'f', fd_word },
|
||
{ 'l', case_down_word },
|
||
{ 'm', toggle_meta_mode },
|
||
{ 'u', case_up_word },
|
||
{ 'y', yank },
|
||
{ 'w', copy_region },
|
||
{ 0, NULL }
|
||
};
|
||
|
||
/*
|
||
* $PchId: editline.c,v 1.4 1996/02/22 21:16:56 philip Exp $
|
||
*/
|