/** $MirBSD: emacs.c,v 1.12 2004/10/28 11:53:41 tg Exp $ */ /* $OpenBSD: emacs.c,v 1.28 2003/10/22 07:40:38 jmc 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 "config.h" #ifdef EMACS #include "sh.h" #include "ksh_stat.h" #include "ksh_dir.h" #include #include #include "edit.h" __RCSID("$MirBSD: emacs.c,v 1.12 2004/10/28 11:53:41 tg Exp $"); static Area aedit; #define AEDIT &aedit /* area for kill ring and macro defns */ #undef CTRL /* _BSD brain damage */ #define CTRL(x) ((x) == '?' ? 0x7F : (x) & 0x1F) /* ASCII */ #define UNCTRL(x) ((x) == 0x7F ? '?' : (x) | 0x40) /* ASCII */ #define META(x) ((x) & 0x7f) #define ISMETA(x) (Flag(FEMACSUSEMETA) && ((x) & 0x80)) /* values returned by keyboard functions */ #define KSTD 0 #define KEOL 1 /* ^M, ^J */ #define KINTR 2 /* ^G, ^C */ struct x_ftab { int (*xf_func)(int c); const char *xf_name; short xf_flags; }; /* index into struct x_ftab x_ftab[] - small is good */ typedef unsigned char Findex; struct x_defbindings { Findex xdb_func; /* XFUNC_* */ unsigned char xdb_tab; unsigned char xdb_char; }; #define XF_ARG 1 /* command takes number prefix */ #define XF_NOBIND 2 /* not allowed to bind to function */ #define XF_PREFIX 4 /* function sets prefix */ /* Separator for completion */ #define is_cfs(c) (c == ' ' || c == '\t' || c == '"' || c == '\'') #define is_mfs(c) (!(isalnum(c) || c == '_' || c == '$')) /* Separator for motion */ #ifdef OS2 /* Deal with 8 bit chars & an extra prefix for function key (these two * changes increase memory usage from 9,216 bytes to 24,416 bytes...) */ # define CHARMASK 0xFF /* 8-bit ASCII character mask */ # define X_NTABS 4 /* normal, meta1, meta2, meta3 */ static int x_prefix3 = 0xE0; #else /* OS2 */ # define CHARMASK 0xFF /* 8-bit character mask */ # define X_NTABS 3 /* normal, meta1, meta2 */ #endif /* OS2 */ #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_skip; static int x_ins(char *cp); static void x_delete(int nc, int push); static int x_bword(void); static int x_fword(void); static void x_goto(char *cp); static void x_bs(int c); static int x_size_str(char *cp); static int x_size(int c); static void x_zots(char *str); static void x_zotc(int c); static void x_load_hist(char **hp); static int x_search(char *pat, int sameline, int offset); static int x_match(char *str, char *pat); static void x_redraw(int limit); static void x_push(int nchars); static char * x_mapin(const char *cp); static char * x_mapout(int c); static void x_print(int prefix, int key); static void x_adjust(void); static void x_e_ungetc(int c); static int x_e_getc(void); static void x_e_putc(int c); static void x_e_puts(const char *s); static int x_comment(int c); static int x_fold_case(int c); static char *x_lastcp(void); static void do_complete(int flags, Comp_type type); static int x_emacs_putbuf(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_ where 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 DEBUG { x_debug_info, "debug-info", 0 }, #else { 0, 0, 0 }, #endif #ifdef OS2 { x_meta3, "prefix-3", XF_PREFIX }, #else { 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' }, #ifdef OS2 { XFUNC_meta3, 0, 0xE0 }, { XFUNC_mv_back, 3, 'K' }, { XFUNC_mv_forw, 3, 'M' }, { XFUNC_next_com, 3, 'P' }, { XFUNC_prev_com, 3, 'H' }, #endif /* OS2 */ /* 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(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; x_adj_ok = 1; x_displen = xx_cols - 2 - x_col; x_adj_done = 0; pprompt(prompt, 0); if (x_nextcmd >= 0) { int off = source->line - x_nextcmd; if (histptr - history >= 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(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { 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(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(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(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(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { 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(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 = xx_cols - 2 - x_col) > 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(int c GCC_FUNC_ATTR(unused)) { x_delete(x_bword(), TRUE); return KSTD; } static int x_mv_bword(int c GCC_FUNC_ATTR(unused)) { (void)x_bword(); return KSTD; } static int x_mv_fword(int c GCC_FUNC_ATTR(unused)) { x_goto(xcp + x_fword()); return KSTD; } static int x_del_fword(int c GCC_FUNC_ATTR(unused)) { x_delete(x_fword(), TRUE); return KSTD; } static int x_bword(void) { 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(void) { 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(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(int c GCC_FUNC_ATTR(unused)) { int i; i = x_size(c); while (i--) x_e_putc('\b'); } static int x_size_str(char *cp) { int size = 0; while (*cp) size += x_size(*cp++); return size; } static int x_size(int c GCC_FUNC_ATTR(unused)) { if (c=='\t') return 4; /* Kludge, tabs are always four spaces. */ if (iscntrl(c)) /* control char */ return 2; return 1; } static void x_zots(char *str) { int adj = x_adj_done; x_lastcp(); while (*str && str < xlp && adj == x_adj_done) x_zotc(*str++); } static void x_zotc(int c GCC_FUNC_ATTR(unused)) { if (c == '\t') { /* Kludge, tabs are always four spaces. */ x_e_puts(" "); } else if (iscntrl(c)) { x_e_putc('^'); x_e_putc(UNCTRL(c)); } else x_e_putc(c); } static int x_mv_back(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { x_e_putc('\r'); x_e_putc('\n'); x_flush(); *xep++ = '\n'; return KEOL; } static int x_end_of_text(int c GCC_FUNC_ATTR(unused)) { return KEOL; } static int x_beg_hist(int c GCC_FUNC_ATTR(unused)) { x_load_hist(history); return KSTD; } static int x_end_hist(int c GCC_FUNC_ATTR(unused)) { x_load_hist(histptr); return KSTD; } static int x_prev_com(int c GCC_FUNC_ATTR(unused)) { x_load_hist(x_histp - x_arg); return KSTD; } static int x_next_com(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { if (x_arg_defaulted) x_load_hist(history); else x_load_hist(histptr + x_arg - source->line); return KSTD; } static void x_load_hist(char **hp) { int oldsize; if (hp < history || 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(int c) { x_nextcmd = source->line - (histptr - x_histp) + 1; return (x_newline(c)); } static int x_eot_del(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(int c GCC_FUNC_ATTR(unused)) { 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(char *pat, int sameline, int offset) { char **hp; int i; for (hp = x_histp - (sameline ? 0 : 1) ; hp >= history; --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(char *str, char *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(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { x_goto(xep); return KSTD; } static int x_mv_begin(int c GCC_FUNC_ATTR(unused)) { x_goto(xbuf); return KSTD; } static int x_draw_line(int c GCC_FUNC_ATTR(unused)) { 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(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(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { x_curprefix = -1; return KSTD; } static int x_meta1(int c GCC_FUNC_ATTR(unused)) { x_curprefix = 1; return KSTD; } static int x_meta2(int c GCC_FUNC_ATTR(unused)) { x_curprefix = 2; return KSTD; } #ifdef OS2 static int x_meta3(int c GCC_FUNC_ATTR(unused)) { x_curprefix = 3; return KSTD; } #endif /* OS2 */ static int x_kill(int c GCC_FUNC_ATTR(unused)) { 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(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(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { /* x_zotc(c); */ xlp = xep = xcp = xbp = xbuf; xlp_valid = TRUE; *xcp = 0; return KINTR; } static int x_error(int c GCC_FUNC_ATTR(unused)) { x_e_putc(BEL); return KSTD; } static int x_stuffreset(int c GCC_FUNC_ATTR(unused)) { #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(int c GCC_FUNC_ATTR(unused)) { #if defined(TIOCSTI) char ch = c; bool_t savmode = x_mode(FALSE); (void)ioctl(TTY, TIOCSTI, &ch); (void)x_mode(savmode); x_redraw(-1); #endif return KSTD; } static char * x_mapin(const char *cp) { char *new, *op; op = new = str_save(cp, ATEMP); while (*cp) { /* XXX -- should handle \^ escape? */ if (*cp == '^') { cp++; #ifdef OS2 if (*cp == '0') /* To define function keys */ *op++ = 0xE0; else #endif /* OS2 */ if (*cp >= '?') /* includes '?'; ASCII */ *op++ = CTRL(*cp); else { *op++ = '^'; cp--; } } else *op++ = *cp; cp++; } *op = '\0'; return new; } static char * x_mapout(int c GCC_FUNC_ATTR(unused)) { static char buf[8]; char *p = buf; #ifdef OS2 if (c == 0xE0) { *p++ = '^'; *p++ = '0'; } else #endif /* OS2 */ if (iscntrl(c)) { *p++ = '^'; *p++ = UNCTRL(c); } else *p++ = c; *p = 0; return buf; } static void x_print(int prefix, int key) { if (prefix == 1) shprintf("%s", x_mapout(x_prefix1)); if (prefix == 2) shprintf("%s", x_mapout(x_prefix2)); #ifdef OS2 if (prefix == 3) shprintf("%s", x_mapout(x_prefix3)); #endif /* OS2 */ 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(const char *a1, const char *a2, int macro, int list) /* bind -m */ /* 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; } m1 = x_mapin(a1); 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; #ifdef OS2 else if (x_tab[prefix][key] == XFUNC_meta3) prefix = 3; #endif /* OS2 */ else break; } 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; } } else { f = XFUNC_ins_string; m2 = x_mapin(a2); sp = str_save(m2, 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(void) { unsigned 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) = 1; } static void bind_if_not_bound(int p, int k, int func); static void bind_if_not_bound(int p, int 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(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(int c GCC_FUNC_ATTR(unused)) { xmp = xcp; return KSTD; } static int x_kill_region(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { char *tmp; if (xmp == NULL) { x_e_putc(BEL); return KSTD; } tmp = xmp; xmp = xcp; x_goto( tmp ); return KSTD; } static int x_version(int c GCC_FUNC_ATTR(unused)) { 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 = (char *) ksh_version + 4; xend = xep = (char *) 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(int c GCC_FUNC_ATTR(unused)) { return KSTD; } /* * File/command name completion routines */ static int x_comp_comm(int c GCC_FUNC_ATTR(unused)) { do_complete(XCF_COMMAND, CT_COMPLETE); return KSTD; } static int x_list_comm(int c GCC_FUNC_ATTR(unused)) { do_complete(XCF_COMMAND, CT_LIST); return KSTD; } static int x_complete(int c GCC_FUNC_ATTR(unused)) { do_complete(XCF_COMMAND_FILE, CT_COMPLETE); return KSTD; } static int x_enumerate(int c GCC_FUNC_ATTR(unused)) { do_complete(XCF_COMMAND_FILE, CT_LIST); return KSTD; } static int x_comp_file(int c GCC_FUNC_ATTR(unused)) { do_complete(XCF_FILE, CT_COMPLETE); return KSTD; } static int x_list_file(int c GCC_FUNC_ATTR(unused)) { do_complete(XCF_FILE, CT_LIST); return KSTD; } static int x_comp_list(int c GCC_FUNC_ATTR(unused)) { do_complete(XCF_COMMAND_FILE, CT_COMPLIST); return KSTD; } static int x_expand(int c GCC_FUNC_ATTR(unused)) { 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(int flags, Comp_type type) /* XCF_{COMMAND,FILE,COMMAND_FILE} */ { 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(void) { 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(int c GCC_FUNC_ATTR(unused)) { unget_char = c; } static int x_e_getc(void) { int c; if (unget_char >= 0) { c = unget_char; unget_char = -1; } else { if (macroptr) { c = *macroptr++; if (!*macroptr) macroptr = (char *) 0; } else c = x_getc(); } return c <= CHARMASK ? c : (c & CHARMASK); } static void x_e_putc(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { 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(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(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { 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 c; 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++; c = *rcp; *rcp = '\0'; x_ins(cp); *rcp = c; } return KSTD; } /* Uppercase N(1) words */ static int x_fold_upper(int c GCC_FUNC_ATTR(unused)) { return x_fold_case('U'); } /* Lowercase N(1) words */ static int x_fold_lower(int c GCC_FUNC_ATTR(unused)) { return x_fold_case('L'); } /* Lowercase N(1) words */ static int x_fold_capitalize(int c GCC_FUNC_ATTR(unused)) { 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(int c GCC_FUNC_ATTR(unused)) { 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(*cp)) *cp = tolower(*cp); } else { /* uppercase, capitalize */ if (islower(*cp)) *cp = toupper(*cp); } cp++; } /* * now for the rest of the word */ while (cp != xep && !is_mfs(*cp)) { if (c == 'U') { /* uppercase */ if (islower(*cp)) *cp = toupper(*cp); } else { /* lowercase, capitalize */ if (isupper(*cp)) *cp = tolower(*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(void) { 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 */