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minix/lib/editline/editline.c

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Initial revision
2005-04-21 16:53:53 +02:00
/* $Revision$
**
** Main editing routines for editline library.
*/
#include "editline.h"
#include <signal.h>
#include <ctype.h>
/*
** Manifest constants.
*/
#define SCREEN_WIDTH 80
#define SCREEN_ROWS 24
#define NO_ARG (-1)
#define DEL 127
#define CTL(x) ((x) & 0x1F)
#define ISCTL(x) ((x) && (x) < ' ')
#define UNCTL(x) ((x) + 64)
#define META(x) ((x) | 0x80)
#define ISMETA(x) ((x) & 0x80)
#define UNMETA(x) ((x) & 0x7F)
#if !defined(HIST_SIZE)
#define HIST_SIZE 20
#endif /* !defined(HIST_SIZE) */
/*
** Command status codes.
*/
typedef enum _STATUS {
CSdone, CSeof, CSmove, CSdispatch, CSstay, CSsignal
} STATUS;
/*
** The type of case-changing to perform.
*/
typedef enum _CASE {
TOupper, TOlower
} CASE;
/*
** Key to command mapping.
*/
typedef struct _KEYMAP {
CHAR Key;
STATUS (*Function)();
} KEYMAP;
/*
** Command history structure.
*/
typedef struct _HISTORY {
int Size;
int Pos;
CHAR *Lines[HIST_SIZE];
} HISTORY;
/*
** Globals.
*/
int rl_eof;
int rl_erase;
int rl_intr;
int rl_kill;
int rl_quit;
STATIC CHAR NIL[] = "";
STATIC CONST CHAR *Input = NIL;
STATIC CHAR *Line;
STATIC CONST char *Prompt;
STATIC CHAR *Yanked;
STATIC char *Screen;
STATIC char NEWLINE[]= CRLF;
STATIC HISTORY H;
STATIC int Repeat;
STATIC int End;
STATIC int Mark;
STATIC int OldPoint;
STATIC int Point;
STATIC int PushBack;
STATIC int Pushed;
STATIC int Signal;
FORWARD KEYMAP Map[33];
FORWARD KEYMAP MetaMap[17];
STATIC SIZE_T Length;
STATIC SIZE_T ScreenCount;
STATIC SIZE_T ScreenSize;
STATIC char *backspace;
STATIC int TTYwidth;
STATIC int TTYrows;
/* Display print 8-bit chars as `M-x' or as the actual 8-bit char? */
int rl_meta_chars = 0;
/*
** Declarations.
*/
STATIC CHAR *editinput();
extern int read();
extern int write();
#if defined(USE_TERMCAP)
extern char *getenv();
extern char *tgetstr();
extern int tgetent();
#endif /* defined(USE_TERMCAP) */
/*
** TTY input/output functions.
*/
STATIC void
TTYflush()
{
if (ScreenCount) {
(void)write(1, Screen, ScreenCount);
ScreenCount = 0;
}
}
STATIC void
TTYput(c)
CHAR c;
{
Screen[ScreenCount] = c;
if (++ScreenCount >= ScreenSize - 1) {
ScreenSize += SCREEN_INC;
RENEW(Screen, char, ScreenSize);
}
}
STATIC void
TTYputs(p)
CHAR *p;
{
while (*p)
TTYput(*p++);
}
STATIC void
TTYshow(c)
CHAR c;
{
if (c == DEL) {
TTYput('^');
TTYput('?');
}
else if (ISCTL(c)) {
TTYput('^');
TTYput(UNCTL(c));
}
else if (rl_meta_chars && ISMETA(c)) {
TTYput('M');
TTYput('-');
TTYput(UNMETA(c));
}
else
TTYput(c);
}
STATIC void
TTYstring(p)
CHAR *p;
{
while (*p)
TTYshow(*p++);
}
STATIC unsigned int
TTYget()
{
CHAR c;
TTYflush();
if (Pushed) {
Pushed = 0;
return PushBack;
}
if (*Input)
return *Input++;
return read(0, &c, (SIZE_T)1) == 1 ? c : EOF;
}
#define TTYback() (backspace ? TTYputs((CHAR *)backspace) : TTYput('\b'))
STATIC void
TTYbackn(n)
int n;
{
while (--n >= 0)
TTYback();
}
STATIC void
TTYinfo()
{
static int init;
#if defined(USE_TERMCAP)
char *term;
char buff[2048];
char *bp;
#endif /* defined(USE_TERMCAP) */
#if defined(TIOCGWINSZ)
struct winsize W;
#endif /* defined(TIOCGWINSZ) */
if (init) {
#if defined(TIOCGWINSZ)
/* Perhaps we got resized. */
if (ioctl(0, TIOCGWINSZ, &W) >= 0
&& W.ws_col > 0 && W.ws_row > 0) {
TTYwidth = (int)W.ws_col;
TTYrows = (int)W.ws_row;
}
#endif /* defined(TIOCGWINSZ) */
return;
}
init++;
TTYwidth = TTYrows = 0;
#if defined(USE_TERMCAP)
bp = &buff[0];
if ((term = getenv("TERM")) == NULL)
term = "dumb";
if (tgetent(buff, term) < 0) {
TTYwidth = SCREEN_WIDTH;
TTYrows = SCREEN_ROWS;
return;
}
if ((backspace = tgetstr("le", &bp)) != NULL)
backspace = strdup(backspace);
TTYwidth = tgetnum("co");
TTYrows = tgetnum("li");
#endif /* defined(USE_TERMCAP) */
#if defined(TIOCGWINSZ)
if (ioctl(0, TIOCGWINSZ, &W) >= 0) {
TTYwidth = (int)W.ws_col;
TTYrows = (int)W.ws_row;
}
#endif /* defined(TIOCGWINSZ) */
if (TTYwidth <= 0 || TTYrows <= 0) {
TTYwidth = SCREEN_WIDTH;
TTYrows = SCREEN_ROWS;
}
}
/*
** Print an array of words in columns.
*/
STATIC void
columns(ac, av)
int ac;
CHAR **av;
{
CHAR *p;
int i;
int j;
int k;
int len;
int skip;
int longest;
int cols;
/* Find longest name, determine column count from that. */
for (longest = 0, i = 0; i < ac; i++)
if ((j = strlen((char *)av[i])) > longest)
longest = j;
cols = TTYwidth / (longest + 3);
TTYputs((CHAR *)NEWLINE);
for (skip = ac / cols + 1, i = 0; i < skip; i++) {
for (j = i; j < ac; j += skip) {
for (p = av[j], len = strlen((char *)p), k = len; --k >= 0; p++)
TTYput(*p);
if (j + skip < ac)
while (++len < longest + 3)
TTYput(' ');
}
TTYputs((CHAR *)NEWLINE);
}
}
STATIC void
reposition()
{
int i;
CHAR *p;
TTYput('\r');
TTYputs((CONST CHAR *)Prompt);
for (i = Point, p = Line; --i >= 0; p++)
TTYshow(*p);
}
STATIC void
left(Change)
STATUS Change;
{
TTYback();
if (Point) {
if (ISCTL(Line[Point - 1]))
TTYback();
else if (rl_meta_chars && ISMETA(Line[Point - 1])) {
TTYback();
TTYback();
}
}
if (Change == CSmove)
Point--;
}
STATIC void
right(Change)
STATUS Change;
{
TTYshow(Line[Point]);
if (Change == CSmove)
Point++;
}
STATIC STATUS
ring_bell()
{
TTYput('\07');
TTYflush();
return CSstay;
}
STATIC STATUS
do_macro(c)
unsigned int c;
{
CHAR name[4];
name[0] = '_';
name[1] = c;
name[2] = '_';
name[3] = '\0';
if ((Input = (CHAR *)getenv((char *)name)) == NULL) {
Input = NIL;
return ring_bell();
}
return CSstay;
}
STATIC STATUS
do_forward(move)
STATUS move;
{
int i;
CHAR *p;
i = 0;
do {
p = &Line[Point];
for ( ; Point < End && (*p == ' ' || !isalnum(*p)); Point++, p++)
if (move == CSmove)
right(CSstay);
for (; Point < End && isalnum(*p); Point++, p++)
if (move == CSmove)
right(CSstay);
if (Point == End)
break;
} while (++i < Repeat);
return CSstay;
}
STATIC STATUS
do_case(type)
CASE type;
{
int i;
int end;
int count;
CHAR *p;
(void)do_forward(CSstay);
if (OldPoint != Point) {
if ((count = Point - OldPoint) < 0)
count = -count;
Point = OldPoint;
if ((end = Point + count) > End)
end = End;
for (i = Point, p = &Line[i]; i < end; i++, p++) {
if (type == TOupper) {
if (islower(*p))
*p = toupper(*p);
}
else if (isupper(*p))
*p = tolower(*p);
right(CSmove);
}
}
return CSstay;
}
STATIC STATUS
case_down_word()
{
return do_case(TOlower);
}
STATIC STATUS
case_up_word()
{
return do_case(TOupper);
}
STATIC void
ceol()
{
int extras;
int i;
CHAR *p;
for (extras = 0, i = Point, p = &Line[i]; i <= End; i++, p++) {
TTYput(' ');
if (ISCTL(*p)) {
TTYput(' ');
extras++;
}
else if (rl_meta_chars && ISMETA(*p)) {
TTYput(' ');
TTYput(' ');
extras += 2;
}
}
for (i += extras; i > Point; i--)
TTYback();
}
STATIC void
clear_line()
{
Point = -strlen(Prompt);
TTYput('\r');
ceol();
Point = 0;
End = 0;
Line[0] = '\0';
}
STATIC STATUS
insert_string(p)
CHAR *p;
{
SIZE_T len;
int i;
CHAR *new;
CHAR *q;
len = strlen((char *)p);
if (End + len >= Length) {
if ((new = NEW(CHAR, Length + len + MEM_INC)) == NULL)
return CSstay;
if (Length) {
COPYFROMTO(new, Line, Length);
DISPOSE(Line);
}
Line = new;
Length += len + MEM_INC;
}
for (q = &Line[Point], i = End - Point; --i >= 0; )
q[len + i] = q[i];
COPYFROMTO(&Line[Point], p, len);
End += len;
Line[End] = '\0';
TTYstring(&Line[Point]);
Point += len;
return Point == End ? CSstay : CSmove;
}
STATIC STATUS
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 $
*/
Reference in a new issue Copy permalink