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-rw-r--r--emacs.c2174
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diff --git a/emacs.c b/emacs.c
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+++ b/emacs.c
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+/* $NetBSD: emacs.c,v 1.38 2018/05/08 16:37:59 kamil Exp $ */
+
+/*
+ * Emacs-like command line editing and history
+ *
+ * created by Ron Natalie at BRL
+ * modified by Doug Kingston, Doug Gwyn, and Lou Salkind
+ * adapted to PD ksh by Eric Gisin
+ */
+#include <sys/cdefs.h>
+
+#ifndef lint
+__RCSID("$NetBSD: emacs.c,v 1.38 2018/05/08 16:37:59 kamil Exp $");
+#endif
+
+#include "config.h"
+#ifdef EMACS
+
+#include <sys/stat.h>
+#include <ctype.h>
+#include <locale.h>
+#include <stdbool.h>
+
+#include "sh.h"
+#include "ksh_dir.h"
+#include "edit.h"
+
+static Area aedit;
+#define AEDIT &aedit /* area for kill ring and macro defns */
+
+#undef CTRL /* _BSD brain damage */
+#define CTRL(x) ((x) == '?' ? 0x7F : (x) & 0x1F) /* ASCII */
+#define UNCTRL(x) ((x) == 0x7F ? '?' : (x) | 0x40) /* ASCII */
+#define META(x) ((x) & 0x7f)
+#define ISMETA(x) (Flag(FEMACSUSEMETA) && ((x) & 0x80))
+
+
+/* values returned by keyboard functions */
+#define KSTD 0
+#define KEOL 1 /* ^M, ^J */
+#define KINTR 2 /* ^G, ^C */
+
+struct x_ftab {
+ int (*xf_func) ARGS((int c));
+ const char *xf_name;
+ short xf_flags;
+};
+
+/* index into struct x_ftab x_ftab[] - small is good */
+typedef unsigned char Findex;
+
+struct x_defbindings {
+ Findex xdb_func; /* XFUNC_* */
+ unsigned char xdb_tab;
+ unsigned char xdb_char;
+};
+
+#define XF_ARG 1 /* command takes number prefix */
+#define XF_NOBIND 2 /* not allowed to bind to function */
+#define XF_PREFIX 4 /* function sets prefix */
+
+/* Separator for completion */
+#define is_cfs(c) (c == ' ' || c == '\t' || c == '"' || c == '\'')
+#define is_mfs(c) (!(isalnum((unsigned char)c) || c == '_' || c == '$')) /* Separator for motion */
+
+# define CHARMASK 0xFF /* 8-bit character mask */
+# define X_NTABS 3 /* normal, meta1, meta2 */
+#define X_TABSZ (CHARMASK+1) /* size of keydef tables etc */
+
+/* Arguments for do_complete()
+ * 0 = enumerate M-= complete as much as possible and then list
+ * 1 = complete M-Esc
+ * 2 = list M-?
+ */
+typedef enum { CT_LIST, /* list the possible completions */
+ CT_COMPLETE, /* complete to longest prefix */
+ CT_COMPLIST /* complete and then list (if non-exact) */
+ } Comp_type;
+
+/* { from 4.9 edit.h */
+/*
+ * The following are used for my horizontal scrolling stuff
+ */
+static char *xbuf; /* beg input buffer */
+static char *xend; /* end input buffer */
+static char *xcp; /* current position */
+static char *xep; /* current end */
+static char *xbp; /* start of visible portion of input buffer */
+static char *xlp; /* last char visible on screen */
+static int x_adj_ok;
+/*
+ * we use x_adj_done so that functions can tell
+ * whether x_adjust() has been called while they are active.
+ */
+static int x_adj_done;
+
+static int xx_cols;
+static int x_col;
+static int x_displen;
+static int x_arg; /* general purpose arg */
+static int x_arg_defaulted;/* x_arg not explicitly set; defaulted to 1 */
+
+static int xlp_valid;
+/* end from 4.9 edit.h } */
+
+static int x_prefix1 = CTRL('['), x_prefix2 = CTRL('X');
+static char **x_histp; /* history position */
+static int x_nextcmd; /* for newline-and-next */
+static char *xmp; /* mark pointer */
+static Findex x_last_command;
+static Findex (*x_tab)[X_TABSZ]; /* key definition */
+static char *(*x_atab)[X_TABSZ]; /* macro definitions */
+static unsigned char x_bound[(X_TABSZ * X_NTABS + 7) / 8];
+#define KILLSIZE 20
+static char *killstack[KILLSIZE];
+static int killsp, killtp;
+static int x_curprefix;
+static char *macroptr;
+static int prompt_trunc;
+static int prompt_skip;
+
+static int x_ins ARGS((char *cp));
+static void x_delete ARGS((int nc, int push));
+static int x_bword ARGS((void));
+static int x_fword ARGS((void));
+static void x_goto ARGS((char *cp));
+static void x_bs ARGS((int c));
+static int x_size_str ARGS((char *cp));
+static int x_size ARGS((int c));
+static void x_zots ARGS((char *str));
+static void x_zotc ARGS((int c));
+static void x_load_hist ARGS((char **hp));
+static int x_search ARGS((char *pat, int sameline, int offset));
+static int x_match ARGS((char *str, char *pat));
+static void x_redraw ARGS((int limit));
+static void x_push ARGS((int nchars));
+static char * x_mapin ARGS((const char *cp, Area *area));
+static char * x_mapout ARGS((int c));
+static void x_print ARGS((int prefix, int key));
+static void x_adjust ARGS((void));
+static void x_e_ungetc ARGS((int c));
+static int x_e_getc ARGS((void));
+static void x_e_putc ARGS((int c));
+static void x_e_puts ARGS((const char *s));
+static int x_comment ARGS((int c));
+static int x_fold_case ARGS((int c));
+static char *x_lastcp ARGS((void));
+static void do_complete ARGS((int flags, Comp_type type));
+static int x_emacs_putbuf ARGS((const char *s, size_t len));
+
+
+/* The lines between START-FUNC-TAB .. END-FUNC-TAB are run through a
+ * script (emacs-gen.sh) that generates emacs.out which contains:
+ * - function declarations for x_* functions
+ * - defines of the form XFUNC_<name> where <name> is function
+ * name, sans leading x_.
+ * Note that the script treats #ifdef and { 0, 0, 0} specially - use with
+ * caution.
+ */
+#include "emacs.out"
+static const struct x_ftab x_ftab[] = {
+/* @START-FUNC-TAB@ */
+ { x_abort, "abort", 0 },
+ { x_beg_hist, "beginning-of-history", 0 },
+ { x_comp_comm, "complete-command", 0 },
+ { x_comp_file, "complete-file", 0 },
+ { x_complete, "complete", 0 },
+ { x_del_back, "delete-char-backward", XF_ARG },
+ { x_del_bword, "delete-word-backward", XF_ARG },
+ { x_del_char, "delete-char-forward", XF_ARG },
+ { x_del_fword, "delete-word-forward", XF_ARG },
+ { x_del_line, "kill-line", 0 },
+ { x_draw_line, "redraw", 0 },
+ { x_end_hist, "end-of-history", 0 },
+ { x_end_of_text, "eot", 0 },
+ { x_enumerate, "list", 0 },
+ { x_eot_del, "eot-or-delete", XF_ARG },
+ { x_error, "error", 0 },
+ { x_goto_hist, "goto-history", XF_ARG },
+ { x_ins_string, "macro-string", XF_NOBIND },
+ { x_insert, "auto-insert", XF_ARG },
+ { x_kill, "kill-to-eol", XF_ARG },
+ { x_kill_region, "kill-region", 0 },
+ { x_list_comm, "list-command", 0 },
+ { x_list_file, "list-file", 0 },
+ { x_literal, "quote", 0 },
+ { x_meta1, "prefix-1", XF_PREFIX },
+ { x_meta2, "prefix-2", XF_PREFIX },
+ { x_meta_yank, "yank-pop", 0 },
+ { x_mv_back, "backward-char", XF_ARG },
+ { x_mv_begin, "beginning-of-line", 0 },
+ { x_mv_bword, "backward-word", XF_ARG },
+ { x_mv_end, "end-of-line", 0 },
+ { x_mv_forw, "forward-char", XF_ARG },
+ { x_mv_fword, "forward-word", XF_ARG },
+ { x_newline, "newline", 0 },
+ { x_next_com, "down-history", XF_ARG },
+ { x_nl_next_com, "newline-and-next", 0 },
+ { x_noop, "no-op", 0 },
+ { x_prev_com, "up-history", XF_ARG },
+ { x_prev_histword, "prev-hist-word", XF_ARG },
+ { x_search_char_forw, "search-character-forward", XF_ARG },
+ { x_search_char_back, "search-character-backward", XF_ARG },
+ { x_search_hist, "search-history", 0 },
+ { x_set_mark, "set-mark-command", 0 },
+ { x_stuff, "stuff", 0 },
+ { x_stuffreset, "stuff-reset", 0 },
+ { x_transpose, "transpose-chars", 0 },
+ { x_version, "version", 0 },
+ { x_xchg_point_mark, "exchange-point-and-mark", 0 },
+ { x_yank, "yank", 0 },
+ { x_comp_list, "complete-list", 0 },
+ { x_expand, "expand-file", 0 },
+ { x_fold_capitalize, "capitalize-word", XF_ARG },
+ { x_fold_lower, "downcase-word", XF_ARG },
+ { x_fold_upper, "upcase-word", XF_ARG },
+ { x_set_arg, "set-arg", XF_NOBIND },
+ { x_comment, "comment", 0 },
+#ifdef SILLY
+ { x_game_of_life, "play-game-of-life", 0 },
+#else
+ { 0, 0, 0 },
+#endif
+#ifdef DEBUG
+ { x_debug_info, "debug-info", 0 },
+#else
+ { 0, 0, 0 },
+ { 0, 0, 0 },
+#endif
+/* @END-FUNC-TAB@ */
+ };
+
+static struct x_defbindings const x_defbindings[] = {
+ { XFUNC_del_back, 0, CTRL('?') },
+ { XFUNC_del_bword, 1, CTRL('?') },
+ { XFUNC_eot_del, 0, CTRL('D') },
+ { XFUNC_del_back, 0, CTRL('H') },
+ { XFUNC_del_bword, 1, CTRL('H') },
+ { XFUNC_del_bword, 1, 'h' },
+ { XFUNC_mv_bword, 1, 'b' },
+ { XFUNC_mv_fword, 1, 'f' },
+ { XFUNC_del_fword, 1, 'd' },
+ { XFUNC_mv_back, 0, CTRL('B') },
+ { XFUNC_mv_forw, 0, CTRL('F') },
+ { XFUNC_search_char_forw, 0, CTRL(']') },
+ { XFUNC_search_char_back, 1, CTRL(']') },
+ { XFUNC_newline, 0, CTRL('M') },
+ { XFUNC_newline, 0, CTRL('J') },
+ { XFUNC_end_of_text, 0, CTRL('_') },
+ { XFUNC_abort, 0, CTRL('G') },
+ { XFUNC_prev_com, 0, CTRL('P') },
+ { XFUNC_next_com, 0, CTRL('N') },
+ { XFUNC_nl_next_com, 0, CTRL('O') },
+ { XFUNC_search_hist, 0, CTRL('R') },
+ { XFUNC_beg_hist, 1, '<' },
+ { XFUNC_end_hist, 1, '>' },
+ { XFUNC_goto_hist, 1, 'g' },
+ { XFUNC_mv_end, 0, CTRL('E') },
+ { XFUNC_mv_begin, 0, CTRL('A') },
+ { XFUNC_draw_line, 0, CTRL('L') },
+ { XFUNC_meta1, 0, CTRL('[') },
+ { XFUNC_meta2, 0, CTRL('X') },
+ { XFUNC_kill, 0, CTRL('K') },
+ { XFUNC_yank, 0, CTRL('Y') },
+ { XFUNC_meta_yank, 1, 'y' },
+ { XFUNC_literal, 0, CTRL('^') },
+ { XFUNC_comment, 1, '#' },
+#if defined(BRL) && defined(TIOCSTI)
+ { XFUNC_stuff, 0, CTRL('T') },
+#else
+ { XFUNC_transpose, 0, CTRL('T') },
+#endif
+ { XFUNC_complete, 1, CTRL('[') },
+ { XFUNC_comp_list, 0, CTRL('I') },
+ { XFUNC_comp_list, 1, '=' },
+ { XFUNC_enumerate, 1, '?' },
+ { XFUNC_expand, 1, '*' },
+ { XFUNC_comp_file, 1, CTRL('X') },
+ { XFUNC_comp_comm, 2, CTRL('[') },
+ { XFUNC_list_comm, 2, '?' },
+ { XFUNC_list_file, 2, CTRL('Y') },
+ { XFUNC_set_mark, 1, ' ' },
+ { XFUNC_kill_region, 0, CTRL('W') },
+ { XFUNC_xchg_point_mark, 2, CTRL('X') },
+ { XFUNC_version, 0, CTRL('V') },
+#ifdef DEBUG
+ { XFUNC_debug_info, 1, CTRL('H') },
+#endif
+ { XFUNC_prev_histword, 1, '.' },
+ { XFUNC_prev_histword, 1, '_' },
+ { XFUNC_set_arg, 1, '0' },
+ { XFUNC_set_arg, 1, '1' },
+ { XFUNC_set_arg, 1, '2' },
+ { XFUNC_set_arg, 1, '3' },
+ { XFUNC_set_arg, 1, '4' },
+ { XFUNC_set_arg, 1, '5' },
+ { XFUNC_set_arg, 1, '6' },
+ { XFUNC_set_arg, 1, '7' },
+ { XFUNC_set_arg, 1, '8' },
+ { XFUNC_set_arg, 1, '9' },
+ { XFUNC_fold_upper, 1, 'U' },
+ { XFUNC_fold_upper, 1, 'u' },
+ { XFUNC_fold_lower, 1, 'L' },
+ { XFUNC_fold_lower, 1, 'l' },
+ { XFUNC_fold_capitalize, 1, 'C' },
+ { XFUNC_fold_capitalize, 1, 'c' },
+ /* These for ansi arrow keys: arguablely shouldn't be here by
+ * default, but its simpler/faster/smaller than using termcap
+ * entries.
+ */
+ { XFUNC_meta2, 1, '[' },
+ { XFUNC_meta2, 1, 'O' },
+ { XFUNC_prev_com, 2, 'A' },
+ { XFUNC_next_com, 2, 'B' },
+ { XFUNC_mv_forw, 2, 'C' },
+ { XFUNC_mv_back, 2, 'D' },
+};
+
+int
+x_emacs(buf, len)
+ char *buf;
+ size_t len;
+{
+ int c;
+ const char *p;
+ int i;
+ Findex f;
+
+ xbp = xbuf = buf; xend = buf + len;
+ xlp = xcp = xep = buf;
+ *xcp = 0;
+ xlp_valid = true;
+ xmp = NULL;
+ x_curprefix = 0;
+ macroptr = (char *) 0;
+ x_histp = histptr + 1;
+ x_last_command = XFUNC_error;
+
+ xx_cols = x_cols;
+ x_col = promptlen(prompt, &p);
+ prompt_skip = p - prompt;
+ prompt_trunc = x_col - (x_cols - 3 - MIN_EDIT_SPACE);
+ if (prompt_trunc > 0)
+ x_col -= prompt_trunc;
+ else
+ prompt_trunc = 0;
+ x_adj_ok = 1;
+ x_displen = xx_cols - 2 - x_col;
+ x_adj_done = 0;
+
+ pprompt(prompt, prompt_trunc);
+
+ if (x_nextcmd >= 0) {
+ int off = source->line - x_nextcmd;
+ if (histptr - histlist >= off)
+ x_load_hist(histptr - off);
+ x_nextcmd = -1;
+ }
+
+ while (1) {
+ x_flush();
+ if ((c = x_e_getc()) < 0)
+ return 0;
+
+ if (ISMETA(c)) {
+ c = META(c);
+ x_curprefix = 1;
+ }
+
+ f = x_curprefix == -1 ? XFUNC_insert
+ : x_tab[x_curprefix][c&CHARMASK];
+
+ if (!(x_ftab[f].xf_flags & XF_PREFIX)
+ && x_last_command != XFUNC_set_arg)
+ {
+ x_arg = 1;
+ x_arg_defaulted = 1;
+ }
+ i = c | (x_curprefix << 8);
+ x_curprefix = 0;
+ switch (i = (*x_ftab[f].xf_func)(i)) {
+ case KSTD:
+ if (!(x_ftab[f].xf_flags & XF_PREFIX))
+ x_last_command = f;
+ break;
+ case KEOL:
+ i = xep - xbuf;
+ return i;
+ case KINTR: /* special case for interrupt */
+ trapsig(SIGINT);
+ x_mode(false);
+ unwind(LSHELL);
+ }
+ }
+}
+
+static int
+x_insert(c)
+ int c;
+{
+ char str[2];
+
+ /*
+ * Should allow tab and control chars.
+ */
+ if (c == 0) {
+ x_e_putc(BEL);
+ return KSTD;
+ }
+ str[0] = c;
+ str[1] = '\0';
+ while (x_arg--)
+ x_ins(str);
+ return KSTD;
+}
+
+static int
+x_ins_string(c)
+ int c;
+{
+ if (macroptr) {
+ x_e_putc(BEL);
+ return KSTD;
+ }
+ macroptr = x_atab[c>>8][c & CHARMASK];
+ if (macroptr && !*macroptr) {
+ /* XXX bell? */
+ macroptr = (char *) 0;
+ }
+ return KSTD;
+}
+
+static int x_do_ins(const char *cp, int len);
+
+static int
+x_do_ins(cp, len)
+ const char *cp;
+ int len;
+{
+ if (xep+len >= xend) {
+ x_e_putc(BEL);
+ return -1;
+ }
+
+ memmove(xcp+len, xcp, xep - xcp + 1);
+ memmove(xcp, cp, len);
+ xcp += len;
+ xep += len;
+ return 0;
+}
+
+static int
+x_ins(s)
+ char *s;
+{
+ char *cp = xcp;
+ int adj = x_adj_done;
+
+ if (x_do_ins(s, strlen(s)) < 0)
+ return -1;
+ /*
+ * x_zots() may result in a call to x_adjust()
+ * we want xcp to reflect the new position.
+ */
+ xlp_valid = false;
+ x_lastcp();
+ x_adj_ok = (xcp >= xlp);
+ x_zots(cp);
+ if (adj == x_adj_done) /* has x_adjust() been called? */
+ {
+ /* no */
+ for (cp = xlp; cp > xcp; )
+ x_bs(*--cp);
+ }
+
+ x_adj_ok = 1;
+ return 0;
+}
+
+/*
+ * this is used for x_escape() in do_complete()
+ */
+static int
+x_emacs_putbuf(s, len)
+ const char *s;
+ size_t len;
+{
+ int rval;
+
+ if ((rval = x_do_ins(s, len)) != 0)
+ return (rval);
+ return (rval);
+}
+
+static int
+x_del_back(c)
+ int c;
+{
+ int col = xcp - xbuf;
+
+ if (col == 0) {
+ x_e_putc(BEL);
+ return KSTD;
+ }
+ if (x_arg > col)
+ x_arg = col;
+ x_goto(xcp - x_arg);
+ x_delete(x_arg, false);
+ return KSTD;
+}
+
+static int
+x_del_char(c)
+ int c;
+{
+ int nleft = xep - xcp;
+
+ if (!nleft) {
+ x_e_putc(BEL);
+ return KSTD;
+ }
+ if (x_arg > nleft)
+ x_arg = nleft;
+ x_delete(x_arg, false);
+ return KSTD;
+}
+
+/* Delete nc chars to the right of the cursor (including cursor position) */
+static void
+x_delete(nc, push)
+ int nc;
+ int push;
+{
+ int i,j;
+ char *cp;
+
+ if (nc == 0)
+ return;
+ if (xmp != NULL && xmp > xcp) {
+ if (xcp + nc > xmp)
+ xmp = xcp;
+ else
+ xmp -= nc;
+ }
+
+ /*
+ * This lets us yank a word we have deleted.
+ */
+ if (push)
+ x_push(nc);
+
+ xep -= nc;
+ cp = xcp;
+ j = 0;
+ i = nc;
+ while (i--) {
+ j += x_size(*cp++);
+ }
+ memmove(xcp, xcp+nc, xep - xcp + 1); /* Copies the null */
+ x_adj_ok = 0; /* don't redraw */
+ x_zots(xcp);
+ /*
+ * if we are already filling the line,
+ * there is no need to ' ','\b'.
+ * But if we must, make sure we do the minimum.
+ */
+ if ((i = x_displen) > 0)
+ {
+ j = (j < i) ? j : i;
+ i = j;
+ while (i--)
+ x_e_putc(' ');
+ i = j;
+ while (i--)
+ x_e_putc('\b');
+ }
+ /*x_goto(xcp);*/
+ x_adj_ok = 1;
+ xlp_valid = false;
+ for (cp = x_lastcp(); cp > xcp; )
+ x_bs(*--cp);
+
+ return;
+}
+
+static int
+x_del_bword(c)
+ int c;
+{
+ x_delete(x_bword(), true);
+ return KSTD;
+}
+
+static int
+x_mv_bword(c)
+ int c;
+{
+ (void)x_bword();
+ return KSTD;
+}
+
+static int
+x_mv_fword(c)
+ int c;
+{
+ x_goto(xcp + x_fword());
+ return KSTD;
+}
+
+static int
+x_del_fword(c)
+ int c;
+{
+ x_delete(x_fword(), true);
+ return KSTD;
+}
+
+static int
+x_bword()
+{
+ int nc = 0;
+ char *cp = xcp;
+
+ if (cp == xbuf) {
+ x_e_putc(BEL);
+ return 0;
+ }
+ while (x_arg--)
+ {
+ while (cp != xbuf && is_mfs(cp[-1]))
+ {
+ cp--;
+ nc++;
+ }
+ while (cp != xbuf && !is_mfs(cp[-1]))
+ {
+ cp--;
+ nc++;
+ }
+ }
+ x_goto(cp);
+ return nc;
+}
+
+static int
+x_fword()
+{
+ int nc = 0;
+ char *cp = xcp;
+
+ if (cp == xep) {
+ x_e_putc(BEL);
+ return 0;
+ }
+ while (x_arg--)
+ {
+ while (cp != xep && is_mfs(*cp))
+ {
+ cp++;
+ nc++;
+ }
+ while (cp != xep && !is_mfs(*cp))
+ {
+ cp++;
+ nc++;
+ }
+ }
+ return nc;
+}
+
+static void
+x_goto(cp)
+ char *cp;
+{
+ if (cp < xbp || cp >= (xbp + x_displen))
+ {
+ /* we are heading off screen */
+ xcp = cp;
+ x_adjust();
+ }
+ else
+ {
+ if (cp < xcp) /* move back */
+ {
+ while (cp < xcp)
+ x_bs(*--xcp);
+ }
+ else
+ {
+ if (cp > xcp) /* move forward */
+ {
+ while (cp > xcp)
+ x_zotc(*xcp++);
+ }
+ }
+ }
+}
+
+static void
+x_bs(c)
+ int c;
+{
+ int i;
+ i = x_size(c);
+ while (i--)
+ x_e_putc('\b');
+}
+
+static int
+x_size_str(cp)
+ char *cp;
+{
+ int size = 0;
+ while (*cp)
+ size += x_size(*cp++);
+ return size;
+}
+
+static int
+x_size(c)
+ int c;
+{
+ if (c=='\t')
+ return 4; /* Kludge, tabs are always four spaces. */
+ if (iscntrl((unsigned char)c)) /* control char */
+ return 2;
+ return 1;
+}
+
+static void
+x_zots(str)
+ char *str;
+{
+ int adj = x_adj_done;
+
+ x_lastcp();
+ while (*str && str < xlp && adj == x_adj_done)
+ x_zotc(*str++);
+}
+
+static void
+x_zotc(c)
+ int c;
+{
+ if (c == '\t') {
+ /* Kludge, tabs are always four spaces. */
+ x_e_puts(" ");
+ } else if (iscntrl((unsigned char)c)) {
+ x_e_putc('^');
+ x_e_putc(UNCTRL(c));
+ } else
+ x_e_putc(c);
+}
+
+static int
+x_mv_back(c)
+ int c;
+{
+ int col = xcp - xbuf;
+
+ if (col == 0) {
+ x_e_putc(BEL);
+ return KSTD;
+ }
+ if (x_arg > col)
+ x_arg = col;
+ x_goto(xcp - x_arg);
+ return KSTD;
+}
+
+static int
+x_mv_forw(c)
+ int c;
+{
+ int nleft = xep - xcp;
+
+ if (!nleft) {
+ x_e_putc(BEL);
+ return KSTD;
+ }
+ if (x_arg > nleft)
+ x_arg = nleft;
+ x_goto(xcp + x_arg);
+ return KSTD;
+}
+
+static int
+x_search_char_forw(c)
+ int c;
+{
+ char *cp = xcp;
+
+ *xep = '\0';
+ c = x_e_getc();
+ while (x_arg--) {
+ if (c < 0
+ || ((cp = (cp == xep) ? NULL : strchr(cp + 1, c)) == NULL
+ && (cp = strchr(xbuf, c)) == NULL))
+ {
+ x_e_putc(BEL);
+ return KSTD;
+ }
+ }
+ x_goto(cp);
+ return KSTD;
+}
+
+static int
+x_search_char_back(c)
+ int c;
+{
+ char *cp = xcp, *p;
+
+ c = x_e_getc();
+ for (; x_arg--; cp = p)
+ for (p = cp; ; ) {
+ if (p-- == xbuf)
+ p = xep;
+ if (c < 0 || p == cp) {
+ x_e_putc(BEL);
+ return KSTD;
+ }
+ if (*p == c)
+ break;
+ }
+ x_goto(cp);
+ return KSTD;
+}
+
+static int
+x_newline(c)
+ int c;
+{
+ x_e_putc('\r');
+ x_e_putc('\n');
+ x_flush();
+ *xep++ = '\n';
+ return KEOL;
+}
+
+static int
+x_end_of_text(c)
+ int c;
+{
+ return KEOL;
+}
+
+static int x_beg_hist(c) int c; { x_load_hist(histlist); return KSTD;}
+
+static int x_end_hist(c) int c; { x_load_hist(histptr); return KSTD;}
+
+static int x_prev_com(c) int c; { x_load_hist(x_histp - x_arg); return KSTD;}
+
+static int x_next_com(c) int c; { x_load_hist(x_histp + x_arg); return KSTD;}
+
+/* Goto a particular history number obtained from argument.
+ * If no argument is given history 1 is probably not what you
+ * want so we'll simply go to the oldest one.
+ */
+static int
+x_goto_hist(c)
+ int c;
+{
+ if (x_arg_defaulted)
+ x_load_hist(histlist);
+ else
+ x_load_hist(histptr + x_arg - source->line);
+ return KSTD;
+}
+
+static void
+x_load_hist(hp)
+ char **hp;
+{
+ int oldsize;
+
+ if (hp < histlist || hp > histptr) {
+ x_e_putc(BEL);
+ return;
+ }
+ x_histp = hp;
+ oldsize = x_size_str(xbuf);
+ strlcpy(xbuf, *hp, xend - xbuf);
+ xbp = xbuf;
+ xep = xcp = xbuf + strlen(xbuf);
+ xlp_valid = false;
+ if (xep > x_lastcp())
+ x_goto(xep);
+ else
+ x_redraw(oldsize);
+}
+
+static int
+x_nl_next_com(c)
+ int c;
+{
+ x_nextcmd = source->line - (histptr - x_histp) + 1;
+ return (x_newline(c));
+}
+
+static int
+x_eot_del(c)
+ int c;
+{
+ if (xep == xbuf && x_arg_defaulted)
+ return (x_end_of_text(c));
+ else
+ return (x_del_char(c));
+}
+
+/* reverse incremental history search */
+static int
+x_search_hist(c)
+ int c;
+{
+ int offset = -1; /* offset of match in xbuf, else -1 */
+ char pat [256+1]; /* pattern buffer */
+ char *p = pat;
+ Findex f;
+
+ *p = '\0';
+ while (1) {
+ if (offset < 0) {
+ x_e_puts("\nI-search: ");
+ x_e_puts(pat);
+ }
+ x_flush();
+ if ((c = x_e_getc()) < 0)
+ return KSTD;
+ f = x_tab[0][c&CHARMASK];
+ if (c == CTRL('['))
+ break;
+ else if (f == XFUNC_search_hist)
+ offset = x_search(pat, 0, offset);
+ else if (f == XFUNC_del_back) {
+ if (p == pat) {
+ offset = -1;
+ break;
+ }
+ if (p > pat)
+ *--p = '\0';
+ if (p == pat)
+ offset = -1;
+ else
+ offset = x_search(pat, 1, offset);
+ continue;
+ } else if (f == XFUNC_insert) {
+ /* add char to pattern */
+ /* overflow check... */
+ if (p >= &pat[sizeof(pat) - 1]) {
+ x_e_putc(BEL);
+ continue;
+ }
+ *p++ = c, *p = '\0';
+ if (offset >= 0) {
+ /* already have partial match */
+ offset = x_match(xbuf, pat);
+ if (offset >= 0) {
+ x_goto(xbuf + offset + (p - pat) - (*pat == '^'));
+ continue;
+ }
+ }
+ offset = x_search(pat, 0, offset);
+ } else { /* other command */
+ x_e_ungetc(c);
+ break;
+ }
+ }
+ if (offset < 0)
+ x_redraw(-1);
+ return KSTD;
+}
+
+/* search backward from current line */
+static int
+x_search(pat, sameline, offset)
+ char *pat;
+ int sameline;
+ int offset;
+{
+ char **hp;
+ int i;
+
+ for (hp = x_histp - (sameline ? 0 : 1) ; hp >= histlist; --hp) {
+ i = x_match(*hp, pat);
+ if (i >= 0) {
+ if (offset < 0)
+ x_e_putc('\n');
+ x_load_hist(hp);
+ x_goto(xbuf + i + strlen(pat) - (*pat == '^'));
+ return i;
+ }
+ }
+ x_e_putc(BEL);
+ x_histp = histptr;
+ return -1;
+}
+
+/* return position of first match of pattern in string, else -1 */
+static int
+x_match(str, pat)
+ char *str, *pat;
+{
+ if (*pat == '^') {
+ return (strncmp(str, pat+1, strlen(pat+1)) == 0) ? 0 : -1;
+ } else {
+ char *q = strstr(str, pat);
+ return (q == NULL) ? -1 : q - str;
+ }
+}
+
+static int
+x_del_line(c)
+ int c;
+{
+ int i, j;
+
+ *xep = 0;
+ i = xep - xbuf;
+ j = x_size_str(xbuf);
+ xcp = xbuf;
+ x_push(i);
+ xlp = xbp = xep = xbuf;
+ xlp_valid = true;
+ *xcp = 0;
+ xmp = NULL;
+ x_redraw(j);
+ return KSTD;
+}
+
+static int
+x_mv_end(c)
+ int c;
+{
+ x_goto(xep);
+ return KSTD;
+}
+
+static int
+x_mv_begin(c)
+ int c;
+{
+ x_goto(xbuf);
+ return KSTD;
+}
+
+static int
+x_draw_line(c)
+ int c;
+{
+ x_redraw(-1);
+ return KSTD;
+
+}
+
+/* Redraw (part of) the line. If limit is < 0, the everything is redrawn
+ * on a NEW line, otherwise limit is the screen column up to which needs
+ * redrawing.
+ */
+static void
+x_redraw(limit)
+ int limit;
+{
+ int i, j;
+ char *cp;
+
+ x_adj_ok = 0;
+ if (limit == -1)
+ x_e_putc('\n');
+ else
+ x_e_putc('\r');
+ x_flush();
+ if (xbp == xbuf)
+ {
+ pprompt(prompt + prompt_skip, 0);
+ x_col = promptlen(prompt, (const char **) 0);
+ }
+ x_displen = xx_cols - 2 - x_col;
+ xlp_valid = false;
+ cp = x_lastcp();
+ x_zots(xbp);
+ if (xbp != xbuf || xep > xlp)
+ limit = xx_cols;
+ if (limit >= 0)
+ {
+ if (xep > xlp)
+ i = 0; /* we fill the line */
+ else
+ i = limit - (xlp - xbp);
+
+ for (j = 0; j < i && x_col < (xx_cols - 2); j++)
+ x_e_putc(' ');
+ i = ' ';
+ if (xep > xlp) /* more off screen */
+ {
+ if (xbp > xbuf)
+ i = '*';
+ else
+ i = '>';
+ }
+ else
+ if (xbp > xbuf)
+ i = '<';
+ x_e_putc(i);
+ j++;
+ while (j--)
+ x_e_putc('\b');
+ }
+ for (cp = xlp; cp > xcp; )
+ x_bs(*--cp);
+ x_adj_ok = 1;
+ D__(x_flush();)
+ return;
+}
+
+static int
+x_transpose(c)
+ int c;
+{
+ char tmp;
+
+ /* What transpose is meant to do seems to be up for debate. This
+ * is a general summary of the options; the text is abcd with the
+ * upper case character or underscore indicating the cursor position:
+ * Who Before After Before After
+ * at&t ksh in emacs mode: abCd abdC abcd_ (bell)
+ * at&t ksh in gmacs mode: abCd baCd abcd_ abdc_
+ * gnu emacs: abCd acbD abcd_ abdc_
+ * Pdksh currently goes with GNU behavior since I believe this is the
+ * most common version of emacs, unless in gmacs mode, in which case
+ * it does the at&t ksh gmacs mode.
+ * This should really be broken up into 3 functions so users can bind
+ * to the one they want.
+ */
+ if (xcp == xbuf) {
+ x_e_putc(BEL);
+ return KSTD;
+ } else if (xcp == xep || Flag(FGMACS)) {
+ if (xcp - xbuf == 1) {
+ x_e_putc(BEL);
+ return KSTD;
+ }
+ /* Gosling/Unipress emacs style: Swap two characters before the
+ * cursor, do not change cursor position
+ */
+ x_bs(xcp[-1]);
+ x_bs(xcp[-2]);
+ x_zotc(xcp[-1]);
+ x_zotc(xcp[-2]);
+ tmp = xcp[-1];
+ xcp[-1] = xcp[-2];
+ xcp[-2] = tmp;
+ } else {
+ /* GNU emacs style: Swap the characters before and under the
+ * cursor, move cursor position along one.
+ */
+ x_bs(xcp[-1]);
+ x_zotc(xcp[0]);
+ x_zotc(xcp[-1]);
+ tmp = xcp[-1];
+ xcp[-1] = xcp[0];
+ xcp[0] = tmp;
+ x_bs(xcp[0]);
+ x_goto(xcp + 1);
+ }
+ return KSTD;
+}
+
+static int
+x_literal(c)
+ int c;
+{
+ x_curprefix = -1;
+ return KSTD;
+}
+
+static int
+x_meta1(c)
+ int c;
+{
+ x_curprefix = 1;
+ return KSTD;
+}
+
+static int
+x_meta2(c)
+ int c;
+{
+ x_curprefix = 2;
+ return KSTD;
+}
+
+static int
+x_kill(c)
+ int c;
+{
+ int col = xcp - xbuf;
+ int lastcol = xep - xbuf;
+ int ndel;
+
+ if (x_arg_defaulted)
+ x_arg = lastcol;
+ else if (x_arg > lastcol)
+ x_arg = lastcol;
+ ndel = x_arg - col;
+ if (ndel < 0) {
+ x_goto(xbuf + x_arg);
+ ndel = -ndel;
+ }
+ x_delete(ndel, true);
+ return KSTD;
+}
+
+static void
+x_push(nchars)
+ int nchars;
+{
+ char *cp = str_nsave(xcp, nchars, AEDIT);
+ if (killstack[killsp])
+ afree((void *)killstack[killsp], AEDIT);
+ killstack[killsp] = cp;
+ killsp = (killsp + 1) % KILLSIZE;
+}
+
+static int
+x_yank(c)
+ int c;
+{
+ if (killsp == 0)
+ killtp = KILLSIZE;
+ else
+ killtp = killsp;
+ killtp--;
+ if (killstack[killtp] == 0) {
+ x_e_puts("\nnothing to yank");
+ x_redraw(-1);
+ return KSTD;
+ }
+ xmp = xcp;
+ x_ins(killstack[killtp]);
+ return KSTD;
+}
+
+static int
+x_meta_yank(c)
+ int c;
+{
+ int len;
+ if ((x_last_command != XFUNC_yank && x_last_command != XFUNC_meta_yank)
+ || killstack[killtp] == 0) {
+ killtp = killsp;
+ x_e_puts("\nyank something first");
+ x_redraw(-1);
+ return KSTD;
+ }
+ len = strlen(killstack[killtp]);
+ x_goto(xcp - len);
+ x_delete(len, false);
+ do {
+ if (killtp == 0)
+ killtp = KILLSIZE - 1;
+ else
+ killtp--;
+ } while (killstack[killtp] == 0);
+ x_ins(killstack[killtp]);
+ return KSTD;
+}
+
+static int
+x_abort(c)
+ int c;
+{
+ /* x_zotc(c); */
+ xlp = xep = xcp = xbp = xbuf;
+ xlp_valid = true;
+ *xcp = 0;
+ return KINTR;
+}
+
+static int
+x_error(c)
+ int c;
+{
+ x_e_putc(BEL);
+ return KSTD;
+}
+
+static int
+x_stuffreset(c)
+ int c;
+{
+#ifdef TIOCSTI
+ (void)x_stuff(c);
+ return KINTR;
+#else
+ x_zotc(c);
+ xlp = xcp = xep = xbp = xbuf;
+ xlp_valid = true;
+ *xcp = 0;
+ x_redraw(-1);
+ return KSTD;
+#endif
+}
+
+static int
+x_stuff(c)
+ int c;
+{
+#if 0 || defined TIOCSTI
+ char ch = c;
+ bool savmode = x_mode(false);
+
+ (void)ioctl(TTY, TIOCSTI, &ch);
+ (void)x_mode(savmode);
+ x_redraw(-1);
+#endif
+ return KSTD;
+}
+
+static char *
+x_mapin(cp, area)
+ const char *cp;
+ Area *area;
+{
+ char *new, *op;
+
+ op = new = str_save(cp, area);
+ while (*cp) {
+ /* XXX -- should handle \^ escape? */
+ if (*cp == '^') {
+ cp++;
+ if (*cp >= '?') /* includes '?'; ASCII */
+ *op++ = CTRL(*cp);
+ else {
+ *op++ = '^';
+ cp--;
+ }
+ } else
+ *op++ = *cp;
+ cp++;
+ }
+ *op = '\0';
+
+ return new;
+}
+
+static char *
+x_mapout(c)
+ int c;
+{
+ static char buf[8];
+ char *p = buf;
+
+ if (iscntrl((unsigned char)c)) {
+ *p++ = '^';
+ *p++ = UNCTRL(c);
+ } else
+ *p++ = c;
+ *p = 0;
+ return buf;
+}
+
+static void
+x_print(prefix, key)
+ int prefix, key;
+{
+ if (prefix == 1)
+ shprintf("%s", x_mapout(x_prefix1));
+ if (prefix == 2)
+ shprintf("%s", x_mapout(x_prefix2));
+
+ shprintf("%s = ", x_mapout(key));
+ if (x_tab[prefix][key] != XFUNC_ins_string)
+ shprintf("%s\n", x_ftab[x_tab[prefix][key]].xf_name);
+ else
+ shprintf("'%s'\n", x_atab[prefix][key]);
+}
+
+int
+x_bind(a1, a2, macro, list)
+ const char *a1, *a2;
+ int macro; /* bind -m */
+ int list; /* bind -l */
+{
+ Findex f;
+ int prefix, key;
+ char *sp = NULL;
+ char *m1, *m2;
+
+ if (x_tab == NULL) {
+ bi_errorf("cannot bind, not a tty");
+ return 1;
+ }
+
+ /* List function names */
+ if (list) {
+ for (f = 0; f < NELEM(x_ftab); f++)
+ if (x_ftab[f].xf_name
+ && !(x_ftab[f].xf_flags & XF_NOBIND))
+ shprintf("%s\n", x_ftab[f].xf_name);
+ return 0;
+ }
+
+ if (a1 == NULL) {
+ for (prefix = 0; prefix < X_NTABS; prefix++)
+ for (key = 0; key < X_TABSZ; key++) {
+ f = x_tab[prefix][key];
+ if (f == XFUNC_insert || f == XFUNC_error
+ || (macro && f != XFUNC_ins_string))
+ continue;
+ x_print(prefix, key);
+ }
+ return 0;
+ }
+
+ m2 = m1 = x_mapin(a1, ATEMP);
+ prefix = key = 0;
+ for (;; m1++) {
+ key = *m1 & CHARMASK;
+ if (x_tab[prefix][key] == XFUNC_meta1)
+ prefix = 1;
+ else if (x_tab[prefix][key] == XFUNC_meta2)
+ prefix = 2;
+ else
+ break;
+ }
+ afree(m2, ATEMP);
+
+ if (a2 == NULL) {
+ x_print(prefix, key);
+ return 0;
+ }
+
+ if (*a2 == 0)
+ f = XFUNC_insert;
+ else if (!macro) {
+ for (f = 0; f < NELEM(x_ftab); f++)
+ if (x_ftab[f].xf_name
+ && strcmp(x_ftab[f].xf_name, a2) == 0)
+ break;
+ if (f == NELEM(x_ftab) || x_ftab[f].xf_flags & XF_NOBIND) {
+ bi_errorf("%s: no such function", a2);
+ return 1;
+ }
+#if 0 /* This breaks the bind commands that map arrow keys */
+ if (f == XFUNC_meta1)
+ x_prefix1 = key;
+ if (f == XFUNC_meta2)
+ x_prefix2 = key;
+#endif /* 0 */
+ } else {
+ f = XFUNC_ins_string;
+ sp = x_mapin(a2, AEDIT);
+ }
+
+ if (x_tab[prefix][key] == XFUNC_ins_string && x_atab[prefix][key])
+ afree((void *)x_atab[prefix][key], AEDIT);
+ x_tab[prefix][key] = f;
+ x_atab[prefix][key] = sp;
+
+ /* Track what the user has bound so x_emacs_keys() won't toast things */
+ if (f == XFUNC_insert)
+ x_bound[(prefix * X_TABSZ + key) / 8] &=
+ ~(1 << ((prefix * X_TABSZ + key) % 8));
+ else
+ x_bound[(prefix * X_TABSZ + key) / 8] |=
+ (1 << ((prefix * X_TABSZ + key) % 8));
+
+ return 0;
+}
+
+void
+x_init_emacs()
+{
+ size_t i;
+ int j;
+ char *locale;
+
+ ainit(AEDIT);
+ x_nextcmd = -1;
+
+ x_tab = (Findex (*)[X_TABSZ]) alloc(sizeofN(*x_tab, X_NTABS), AEDIT);
+ for (j = 0; j < X_TABSZ; j++)
+ x_tab[0][j] = XFUNC_insert;
+ for (i = 1; i < X_NTABS; i++)
+ for (j = 0; j < X_TABSZ; j++)
+ x_tab[i][j] = XFUNC_error;
+ for (i = 0; i < NELEM(x_defbindings); i++)
+ x_tab[(unsigned char)x_defbindings[i].xdb_tab][x_defbindings[i].xdb_char]
+ = x_defbindings[i].xdb_func;
+
+ x_atab = (char *(*)[X_TABSZ]) alloc(sizeofN(*x_atab, X_NTABS), AEDIT);
+ for (i = 1; i < X_NTABS; i++)
+ for (j = 0; j < X_TABSZ; j++)
+ x_atab[i][j] = NULL;
+
+ /* Determine if we can translate meta key or use 8-bit AscII
+ * XXX - It would be nice if there was a locale attribute to
+ * determine if the locale is 7-bit or not.
+ */
+ locale = setlocale(LC_CTYPE, NULL);
+ if (locale == NULL || !strcmp(locale, "C") || !strcmp(locale, "POSIX"))
+ Flag(FEMACSUSEMETA) = 0;
+}
+
+static void bind_if_not_bound(int p, int k, int func);
+
+static void
+bind_if_not_bound(p, k, func)
+ int p, k;
+ int func;
+{
+ /* Has user already bound this key? If so, don't override it */
+ if (x_bound[((p) * X_TABSZ + (k)) / 8]
+ & (1 << (((p) * X_TABSZ + (k)) % 8)))
+ return;
+
+ x_tab[p][k] = func;
+}
+
+void
+x_emacs_keys(ec)
+ X_chars *ec;
+{
+ if (ec->erase >= 0) {
+ bind_if_not_bound(0, ec->erase, XFUNC_del_back);
+ bind_if_not_bound(1, ec->erase, XFUNC_del_bword);
+ }
+ if (ec->kill >= 0)
+ bind_if_not_bound(0, ec->kill, XFUNC_del_line);
+ if (ec->werase >= 0)
+ bind_if_not_bound(0, ec->werase, XFUNC_del_bword);
+ if (ec->intr >= 0)
+ bind_if_not_bound(0, ec->intr, XFUNC_abort);
+ if (ec->quit >= 0)
+ bind_if_not_bound(0, ec->quit, XFUNC_noop);
+}
+
+static int
+x_set_mark(c)
+ int c;
+{
+ xmp = xcp;
+ return KSTD;
+}
+
+static int
+x_kill_region(c)
+ int c;
+{
+ int rsize;
+ char *xr;
+
+ if (xmp == NULL) {
+ x_e_putc(BEL);
+ return KSTD;
+ }
+ if (xmp > xcp) {
+ rsize = xmp - xcp;
+ xr = xcp;
+ } else {
+ rsize = xcp - xmp;
+ xr = xmp;
+ }
+ x_goto(xr);
+ x_delete(rsize, true);
+ xmp = xr;
+ return KSTD;
+}
+
+static int
+x_xchg_point_mark(c)
+ int c;
+{
+ char *tmp;
+
+ if (xmp == NULL) {
+ x_e_putc(BEL);
+ return KSTD;
+ }
+ tmp = xmp;
+ xmp = xcp;
+ x_goto( tmp );
+ return KSTD;
+}
+
+static int
+x_version(c)
+ int c;
+{
+ char *o_xbuf = xbuf, *o_xend = xend;
+ char *o_xbp = xbp, *o_xep = xep, *o_xcp = xcp;
+ int lim = x_lastcp() - xbp;
+
+ xbuf = xbp = xcp = ksh_version + 4;
+ xend = xep = ksh_version + 4 + strlen(ksh_version + 4);
+ x_redraw(lim);
+ x_flush();
+
+ c = x_e_getc();
+ xbuf = o_xbuf;
+ xend = o_xend;
+ xbp = o_xbp;
+ xep = o_xep;
+ xcp = o_xcp;
+ x_redraw(strlen(ksh_version));
+
+ if (c < 0)
+ return KSTD;
+ /* This is what at&t ksh seems to do... Very bizarre */
+ if (c != ' ')
+ x_e_ungetc(c);
+
+ return KSTD;
+}
+
+static int
+x_noop(c)
+ int c;
+{
+ return KSTD;
+}
+
+#ifdef SILLY
+static int
+x_game_of_life(c)
+ int c;
+{
+ char newbuf [256+1];
+ char *ip, *op;
+ int i, len;
+
+ i = xep - xbuf;
+ *xep = 0;
+ len = x_size_str(xbuf);
+ xcp = xbp = xbuf;
+ memmove(newbuf+1, xbuf, i);
+ newbuf[0] = 'A';
+ newbuf[i] = 'A';
+ for (ip = newbuf+1, op = xbuf; --i >= 0; ip++, op++) {
+ /* Empty space */
+ if (*ip < '@' || *ip == '_' || *ip == 0x7F) {
+ /* Two adults, make whoopee */
+ if (ip[-1] < '_' && ip[1] < '_') {
+ /* Make kid look like parents. */
+ *op = '`' + ((ip[-1] + ip[1])/2)%32;
+ if (*op == 0x7F) /* Birth defect */
+ *op = '`';
+ }
+ else
+ *op = ' '; /* nothing happens */
+ continue;
+ }
+ /* Child */
+ if (*ip > '`') {
+ /* All alone, dies */
+ if (ip[-1] == ' ' && ip[1] == ' ')
+ *op = ' ';
+ else /* Gets older */
+ *op = *ip-'`'+'@';
+ continue;
+ }
+ /* Adult */
+ /* Overcrowded, dies */
+ if (ip[-1] >= '@' && ip[1] >= '@') {
+ *op = ' ';
+ continue;
+ }
+ *op = *ip;
+ }
+ *op = 0;
+ x_redraw(len);
+ return KSTD;
+}
+#endif
+
+/*
+ * File/command name completion routines
+ */
+
+
+static int
+x_comp_comm(c)
+ int c;
+{
+ do_complete(XCF_COMMAND, CT_COMPLETE);
+ return KSTD;
+}
+static int
+x_list_comm(c)
+ int c;
+{
+ do_complete(XCF_COMMAND, CT_LIST);
+ return KSTD;
+}
+static int
+x_complete(c)
+ int c;
+{
+ do_complete(XCF_COMMAND_FILE, CT_COMPLETE);
+ return KSTD;
+}
+static int
+x_enumerate(c)
+ int c;
+{
+ do_complete(XCF_COMMAND_FILE, CT_LIST);
+ return KSTD;
+}
+static int
+x_comp_file(c)
+ int c;
+{
+ do_complete(XCF_FILE, CT_COMPLETE);
+ return KSTD;
+}
+static int
+x_list_file(c)
+ int c;
+{
+ do_complete(XCF_FILE, CT_LIST);
+ return KSTD;
+}
+static int
+x_comp_list(c)
+ int c;
+{
+ do_complete(XCF_COMMAND_FILE, CT_COMPLIST);
+ return KSTD;
+}
+static int
+x_expand(c)
+ int c;
+{
+ char **words;
+ int nwords = 0;
+ int start, end;
+ int is_command;
+ int i;
+
+ nwords = x_cf_glob(XCF_FILE,
+ xbuf, xep - xbuf, xcp - xbuf,
+ &start, &end, &words, &is_command);
+
+ if (nwords == 0) {
+ x_e_putc(BEL);
+ return KSTD;
+ }
+
+ x_goto(xbuf + start);
+ x_delete(end - start, false);
+ for (i = 0; i < nwords;) {
+ if (x_escape(words[i], strlen(words[i]), x_emacs_putbuf) < 0 ||
+ (++i < nwords && x_ins(space) < 0))
+ {
+ x_e_putc(BEL);
+ return KSTD;
+ }
+ }
+ x_adjust();
+
+ return KSTD;
+}
+
+/* type == 0 for list, 1 for complete and 2 for complete-list */
+static void
+do_complete(flags, type)
+ int flags; /* XCF_{COMMAND,FILE,COMMAND_FILE} */
+ Comp_type type;
+{
+ char **words;
+ int nwords;
+ int start, end, nlen, olen;
+ int is_command;
+ int completed = 0;
+
+ nwords = x_cf_glob(flags, xbuf, xep - xbuf, xcp - xbuf,
+ &start, &end, &words, &is_command);
+ /* no match */
+ if (nwords == 0) {
+ x_e_putc(BEL);
+ return;
+ }
+
+ if (type == CT_LIST) {
+ x_print_expansions(nwords, words, is_command);
+ x_redraw(0);
+ x_free_words(nwords, words);
+ return;
+ }
+
+ olen = end - start;
+ nlen = x_longest_prefix(nwords, words);
+ /* complete */
+ if (nwords == 1 || nlen > olen) {
+ x_goto(xbuf + start);
+ x_delete(olen, false);
+ x_escape(words[0], nlen, x_emacs_putbuf);
+ x_adjust();
+ completed = 1;
+ }
+ /* add space if single non-dir match */
+ if ((nwords == 1) && (!ISDIRSEP(words[0][nlen - 1]))) {
+ x_ins(space);
+ completed = 1;
+ }
+
+ if (type == CT_COMPLIST && !completed) {
+ x_print_expansions(nwords, words, is_command);
+ completed = 1;
+ }
+
+ if (completed)
+ x_redraw(0);
+
+ x_free_words(nwords, words);
+}
+
+/* NAME:
+ * x_adjust - redraw the line adjusting starting point etc.
+ *
+ * DESCRIPTION:
+ * This function is called when we have exceeded the bounds
+ * of the edit window. It increments x_adj_done so that
+ * functions like x_ins and x_delete know that we have been
+ * called and can skip the x_bs() stuff which has already
+ * been done by x_redraw.
+ *
+ * RETURN VALUE:
+ * None
+ */
+
+static void
+x_adjust()
+{
+ x_adj_done++; /* flag the fact that we were called. */
+ /*
+ * we had a problem if the prompt length > xx_cols / 2
+ */
+ if ((xbp = xcp - (x_displen / 2)) < xbuf)
+ xbp = xbuf;
+ xlp_valid = false;
+ x_redraw(xx_cols);
+ x_flush();
+}
+
+static int unget_char = -1;
+
+static void
+x_e_ungetc(c)
+ int c;
+{
+ unget_char = c;
+}
+
+static int
+x_e_getc()
+{
+ int c;
+
+ if (unget_char >= 0) {
+ c = unget_char;
+ unget_char = -1;
+ } else {
+ if (macroptr) {
+ c = (unsigned char) *macroptr++;
+ if (!*macroptr)
+ macroptr = (char *) 0;
+ } else
+ c = x_getc();
+ }
+
+ return c <= CHARMASK ? c : (c & CHARMASK);
+}
+
+static void
+x_e_putc(c)
+ int c;
+{
+ if (c == '\r' || c == '\n')
+ x_col = 0;
+ if (x_col < xx_cols)
+ {
+ x_putc(c);
+ switch(c)
+ {
+ case BEL:
+ break;
+ case '\r':
+ case '\n':
+ break;
+ case '\b':
+ x_col--;
+ break;
+ default:
+ x_col++;
+ break;
+ }
+ }
+ if (x_adj_ok && (x_col < 0 || x_col >= (xx_cols - 2)))
+ {
+ x_adjust();
+ }
+}
+
+#ifdef DEBUG
+static int
+x_debug_info(c)
+ int c;
+{
+ x_flush();
+ shellf("\nksh debug:\n");
+ shellf("\tx_col == %d,\t\tx_cols == %d,\tx_displen == %d\n",
+ x_col, xx_cols, x_displen);
+ shellf("\txcp == 0x%lx,\txep == 0x%lx\n", (long) xcp, (long) xep);
+ shellf("\txbp == 0x%lx,\txbuf == 0x%lx\n", (long) xbp, (long) xbuf);
+ shellf("\txlp == 0x%lx\n", (long) xlp);
+ shellf("\txlp == 0x%lx\n", (long) x_lastcp());
+ shellf(newline);
+ x_redraw(-1);
+ return 0;
+}
+#endif
+
+static void
+x_e_puts(s)
+ const char *s;
+{
+ int adj = x_adj_done;
+
+ while (*s && adj == x_adj_done)
+ x_e_putc(*s++);
+}
+
+/* NAME:
+ * x_set_arg - set an arg value for next function
+ *
+ * DESCRIPTION:
+ * This is a simple implementation of M-[0-9].
+ *
+ * RETURN VALUE:
+ * KSTD
+ */
+
+static int
+x_set_arg(c)
+ int c;
+{
+ int n = 0;
+ int first = 1;
+
+ c &= CHARMASK; /* strip command prefix */
+ for (; c >= 0 && isdigit(c); c = x_e_getc(), first = 0)
+ n = n * 10 + (c - '0');
+ if (c < 0 || first) {
+ x_e_putc(BEL);
+ x_arg = 1;
+ x_arg_defaulted = 1;
+ } else {
+ x_e_ungetc(c);
+ x_arg = n;
+ x_arg_defaulted = 0;
+ }
+ return KSTD;
+}
+
+
+/* Comment or uncomment the current line. */
+static int
+x_comment(c)
+ int c;
+{
+ int oldsize = x_size_str(xbuf);
+ int len = xep - xbuf;
+ int ret = x_do_comment(xbuf, xend - xbuf, &len);
+
+ if (ret < 0)
+ x_e_putc(BEL);
+ else {
+ xep = xbuf + len;
+ *xep = '\0';
+ xcp = xbp = xbuf;
+ x_redraw(oldsize);
+ if (ret > 0)
+ return x_newline('\n');
+ }
+ return KSTD;
+}
+
+
+/* NAME:
+ * x_prev_histword - recover word from prev command
+ *
+ * DESCRIPTION:
+ * This function recovers the last word from the previous
+ * command and inserts it into the current edit line. If a
+ * numeric arg is supplied then the n'th word from the
+ * start of the previous command is used.
+ *
+ * Bound to M-.
+ *
+ * RETURN VALUE:
+ * KSTD
+ */
+
+static int
+x_prev_histword(c)
+ int c;
+{
+ char *rcp;
+ char *cp;
+
+ cp = *histptr;
+ if (!cp)
+ x_e_putc(BEL);
+ else if (x_arg_defaulted) {
+ rcp = &cp[strlen(cp) - 1];
+ /*
+ * ignore white-space after the last word
+ */
+ while (rcp > cp && is_cfs(*rcp))
+ rcp--;
+ while (rcp > cp && !is_cfs(*rcp))
+ rcp--;
+ if (is_cfs(*rcp))
+ rcp++;
+ x_ins(rcp);
+ } else {
+ int i;
+
+ rcp = cp;
+ /*
+ * ignore white-space at start of line
+ */
+ while (*rcp && is_cfs(*rcp))
+ rcp++;
+ while (x_arg-- > 1)
+ {
+ while (*rcp && !is_cfs(*rcp))
+ rcp++;
+ while (*rcp && is_cfs(*rcp))
+ rcp++;
+ }
+ cp = rcp;
+ while (*rcp && !is_cfs(*rcp))
+ rcp++;
+ i = *rcp;
+ *rcp = '\0';
+ x_ins(cp);
+ *rcp = i;
+ }
+ return KSTD;
+}
+
+/* Uppercase N(1) words */
+static int
+x_fold_upper(c)
+ int c;
+{
+ return x_fold_case('U');
+}
+
+/* Lowercase N(1) words */
+static int
+x_fold_lower(c)
+ int c;
+{
+ return x_fold_case('L');
+}
+
+/* Lowercase N(1) words */
+static int
+x_fold_capitalize(c)
+ int c;
+{
+ return x_fold_case('C');
+}
+
+/* NAME:
+ * x_fold_case - convert word to UPPER/lower/Capital case
+ *
+ * DESCRIPTION:
+ * This function is used to implement M-U,M-u,M-L,M-l,M-C and M-c
+ * to UPPER case, lower case or Capitalize words.
+ *
+ * RETURN VALUE:
+ * None
+ */
+
+static int
+x_fold_case(c)
+ int c;
+{
+ char *cp = xcp;
+
+ if (cp == xep) {
+ x_e_putc(BEL);
+ return KSTD;
+ }
+ while (x_arg--) {
+ /*
+ * first skip over any white-space
+ */
+ while (cp != xep && is_mfs(*cp))
+ cp++;
+ /*
+ * do the first char on its own since it may be
+ * a different action than for the rest.
+ */
+ if (cp != xep) {
+ if (c == 'L') { /* lowercase */
+ if (isupper((unsigned char)*cp))
+ *cp = tolower((unsigned char)*cp);
+ } else { /* uppercase, capitialize */
+ if (islower((unsigned char)*cp))
+ *cp = toupper((unsigned char)*cp);
+ }
+ cp++;
+ }
+ /*
+ * now for the rest of the word
+ */
+ while (cp != xep && !is_mfs((unsigned char)*cp)) {
+ if (c == 'U') { /* uppercase */
+ if (islower((unsigned char)*cp))
+ *cp = toupper((unsigned char)*cp);
+ } else { /* lowercase, capitialize */
+ if (isupper((unsigned char)*cp))
+ *cp = tolower((unsigned char)*cp);
+ }
+ cp++;
+ }
+ }
+ x_goto(cp);
+ return KSTD;
+}
+
+/* NAME:
+ * x_lastcp - last visible char
+ *
+ * SYNOPSIS:
+ * x_lastcp()
+ *
+ * DESCRIPTION:
+ * This function returns a pointer to that char in the
+ * edit buffer that will be the last displayed on the
+ * screen. The sequence:
+ *
+ * for (cp = x_lastcp(); cp > xcp; cp)
+ * x_bs(*--cp);
+ *
+ * Will position the cursor correctly on the screen.
+ *
+ * RETURN VALUE:
+ * cp or NULL
+ */
+
+static char *
+x_lastcp()
+{
+ char *rcp;
+ int i;
+
+ if (!xlp_valid)
+ {
+ for (i = 0, rcp = xbp; rcp < xep && i < x_displen; rcp++)
+ i += x_size(*rcp);
+ xlp = rcp;
+ }
+ xlp_valid = true;
+ return (xlp);
+}
+
+#endif /* EDIT */
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-20 13:42:20 +0000