/* * Copyright (c) 1980 Regents of the University of California. * All rights reserved. The Berkeley software License Agreement * specifies the terms and conditions for redistribution. */ #if !defined(lint) && defined(DOSCCS) static char *sccsid = "@(#)ex_cmds.c 7.10.1 (2.11BSD) 1996/11/19"; #endif #include "ex.h" #include "ex_argv.h" #include "ex_temp.h" #include "ex_tty.h" #include "ex_vis.h" bool pflag, nflag; int poffset; const char *versionstring = "@(#) Version 3.7, 6/7/85. Changes by Gunnar Ritter 31/05/00." + 5; #define nochng() lchng = chng /* * Main loop for command mode command decoding. * A few commands are executed here, but main function * is to strip command addresses, do a little address oriented * processing and call command routines to do the real work. */ commands(noprompt, exitoneof) bool noprompt, exitoneof; { register line *addr; register int c; register int lchng; int given; int seensemi; int cnt; bool hadpr; resetflav(); nochng(); for (;;) { /* * If dot at last command * ended up at zero, advance to one if there is a such. */ if (dot <= zero) { dot = zero; if (dol > zero) dot = one; } shudclob = 0; /* * If autoprint or trailing print flags, * print the line at the specified offset * before the next command. */ if (pflag || lchng != chng && value(AUTOPRINT) && !inglobal && !inopen && endline) { pflag = 0; nochng(); if (dol != zero) { addr1 = addr2 = dot + poffset; if (addr1 < one || addr1 > dol) error("Offset out-of-bounds|Offset after command too large"); setdot1(); goto print; } } nochng(); /* * Print prompt if appropriate. * If not in global flush output first to prevent * going into pfast mode unreasonably. */ if (inglobal == 0) { flush(); if (!hush && value(PROMPT) && !globp && !noprompt && endline) { putchar(':'); hadpr = 1; } TSYNC(); } /* * Gobble up the address. * Degenerate addresses yield ".". */ addr2 = 0; given = seensemi = 0; do { addr1 = addr2; addr = address(0); c = getcd(); if (addr == 0) if (c == ',') addr = dot; else if (addr1 != 0) { addr2 = dot; break; } else break; addr2 = addr; given++; if (c == ';') { c = ','; dot = addr; seensemi = 1; } } while (c == ','); if (c == '%') { /* %: same as 1,$ */ addr1 = one; addr2 = dol; given = 2; c = getchar(); } if (addr1 == 0) addr1 = addr2; if (c == ':') c = getchar(); /* * Set command name for special character commands. */ tailspec(c); /* * If called via : escape from open or visual, limit * the set of available commands here to save work below. */ if (inopen) { if (c=='\n' || c=='\r' || c==CTRL('d') || c==EOF) { if (addr2) dot = addr2; if (c == EOF) return; continue; } if (any(c, "o")) notinvis: tailprim(Command, 1, 1); } choice: switch (c) { case 'a': switch(peekchar()) { case 'b': /* abbreviate */ tail("abbreviate"); setnoaddr(); mapcmd(0, 1); anyabbrs = 1; continue; case 'r': /* args */ tail("args"); setnoaddr(); eol(); pargs(); continue; } /* append */ if (inopen) goto notinvis; tail("append"); setdot(); aiflag = exclam(); newline(); vmacchng(0); deletenone(); setin(addr2); inappend = 1; ignore(append(gettty, addr2)); inappend = 0; nochng(); continue; case 'c': switch (peekchar()) { /* copy */ case 'o': tail("copy"); vmacchng(0); move(); continue; #ifdef CHDIR /* cd */ case 'd': tail("cd"); goto changdir; /* chdir */ case 'h': ignchar(); if (peekchar() == 'd') { register char *p; tail2of("chdir"); changdir: if (savedfile[0] == '/' || !value(WARN)) ignore(exclam()); else ignore(quickly()); if (skipend()) { p = getenv("HOME"); if (p == NULL) error("Home directory unknown"); } else getone(), p = file; eol(); if (chdir(p) < 0) filioerr(p); if (savedfile[0] != '/') edited = 0; continue; } if (inopen) tailprim("change", 2, 1); tail2of("change"); break; #endif default: if (inopen) goto notinvis; tail("change"); break; } /* change */ aiflag = exclam(); setCNL(); vmacchng(0); setin(addr1); delete(0); inappend = 1; ignore(append(gettty, addr1 - 1)); inappend = 0; nochng(); continue; /* delete */ case 'd': /* * Caution: dp and dl have special meaning already. */ tail("delete"); c = cmdreg(); setCNL(); vmacchng(0); if (c) YANKreg(c); delete(0); appendnone(); continue; /* edit */ /* ex */ case 'e': tail(peekchar() == 'x' ? "ex" : "edit"); editcmd: if (!exclam() && chng) c = 'E'; filename(c); if (c == 'E') { ungetchar(lastchar()); ignore(quickly()); } setnoaddr(); doecmd: init(); addr2 = zero; laste++; sync(); rop(c); #ifdef VMUNIX tlaste(); #endif laste = 0; sync(); nochng(); continue; /* file */ case 'f': tail("file"); setnoaddr(); filename(c); noonl(); /* synctmp(); */ continue; /* global */ case 'g': tail("global"); global(!exclam()); nochng(); continue; /* insert */ case 'i': if (inopen) goto notinvis; tail("insert"); setdot(); nonzero(); aiflag = exclam(); newline(); vmacchng(0); deletenone(); setin(addr2); inappend = 1; ignore(append(gettty, addr2 - 1)); inappend = 0; if (dot == zero && dol > zero) dot = one; nochng(); continue; /* join */ case 'j': tail("join"); c = exclam(); setcount(); nonzero(); newline(); vmacchng(0); if (given < 2 && addr2 != dol) addr2++; join(c); continue; /* k */ case 'k': casek: pastwh(); c = getchar(); if (endcmd(c)) serror("Mark what?|%s requires following letter", Command); newline(); if (!islower(c)) error("Bad mark|Mark must specify a letter"); setdot(); nonzero(); names[c - 'a'] = *addr2 &~ 01; anymarks = 1; continue; /* list */ case 'l': tail("list"); setCNL(); ignorf(setlist(1)); pflag = 0; goto print; case 'm': if (peekchar() == 'a') { ignchar(); if (peekchar() == 'p') { /* map */ tail2of("map"); setnoaddr(); mapcmd(0, 0); continue; } /* mark */ tail2of("mark"); goto casek; } /* move */ tail("move"); vmacchng(0); move(); continue; case 'n': if (peekchar() == 'u') { tail("number"); goto numberit; } /* next */ tail("next"); setnoaddr(); ckaw(); ignore(quickly()); if (getargs()) makargs(); next(); c = 'e'; filename(c); goto doecmd; /* open */ case 'o': tail("open"); oop(); pflag = 0; nochng(); continue; case 'p': case 'P': switch (peekchar()) { /* put */ case 'u': tail("put"); setdot(); c = cmdreg(); eol(); vmacchng(0); if (c) putreg(c); else put(); continue; case 'r': ignchar(); if (peekchar() == 'e') { /* preserve */ tail2of("preserve"); eol(); if (preserve() == 0) error("Preserve failed!"); else error("File preserved."); } tail2of("print"); break; default: tail("print"); break; } /* print */ setCNL(); pflag = 0; print: nonzero(); if (CL && span() > LINES) { flush1(); vclear(); } plines(addr1, addr2, 1); continue; /* quit */ case 'q': tail("quit"); setnoaddr(); c = quickly(); eol(); if (!c) quit: nomore(); if (inopen) { vgoto(WECHO, 0); if (!ateopr()) vnfl(); else { tostop(); } flush(); setty(normf); } cleanup(1); exit(0); case 'r': if (peekchar() == 'e') { ignchar(); switch (peekchar()) { /* rewind */ case 'w': tail2of("rewind"); setnoaddr(); if (!exclam()) { ckaw(); if (chng && dol > zero) error("No write@since last change (:rewind! overrides)"); } eol(); erewind(); next(); c = 'e'; ungetchar(lastchar()); filename(c); goto doecmd; /* recover */ case 'c': tail2of("recover"); setnoaddr(); c = 'e'; if (!exclam() && chng) c = 'E'; filename(c); if (c == 'E') { ungetchar(lastchar()); ignore(quickly()); } init(); addr2 = zero; laste++; sync(); recover(); rop2(); revocer(); if (status == 0) rop3(c); if (dol != zero) change(); #ifdef VMUNIX tlaste(); #endif laste = 0; nochng(); continue; } tail2of("read"); } else tail("read"); /* read */ if (savedfile[0] == 0 && dol == zero) c = 'e'; pastwh(); vmacchng(0); if (peekchar() == '!') { setdot(); ignchar(); unix0(0); filter(0); continue; } filename(c); rop(c); nochng(); if (inopen && endline && addr1 > zero && addr1 < dol) dot = addr1 + 1; continue; case 's': switch (peekchar()) { /* * Caution: 2nd char cannot be c, g, or r * because these have meaning to substitute. */ /* set */ case 'e': tail("set"); setnoaddr(); set(); continue; /* shell */ case 'h': tail("shell"); setNAEOL(); vnfl(); putpad(TE); flush(); unixwt(1, unixex("-i", (char *) 0, 0, 0)); vcontin(0); continue; /* source */ case 'o': #ifdef notdef if (inopen) goto notinvis; #endif tail("source"); setnoaddr(); getone(); eol(); source(file, 0); continue; #ifdef SIGTSTP /* stop, suspend */ case 't': tail("stop"); goto suspend; case 'u': tail("suspend"); suspend: if (!ldisc) error("Old tty driver|Not using new tty driver/shell"); c = exclam(); eol(); if (!c) ckaw(); onsusp(); continue; #endif } /* fall into ... */ /* & */ /* ~ */ /* substitute */ case '&': case '~': Command = "substitute"; if (c == 's') tail(Command); vmacchng(0); if (!substitute(c)) pflag = 0; continue; /* t */ case 't': if (peekchar() == 'a') { tail("tag"); tagfind(exclam()); if (!inopen) lchng = chng - 1; else nochng(); continue; } tail("t"); vmacchng(0); move(); continue; case 'u': if (peekchar() == 'n') { ignchar(); switch(peekchar()) { /* unmap */ case 'm': tail2of("unmap"); setnoaddr(); mapcmd(1, 0); continue; /* unabbreviate */ case 'a': tail2of("unabbreviate"); setnoaddr(); mapcmd(1, 1); anyabbrs = 1; continue; } /* undo */ tail2of("undo"); } else tail("undo"); setnoaddr(); markDOT(); c = exclam(); newline(); undo(c); continue; case 'v': switch (peekchar()) { case 'e': /* version */ tail("version"); setNAEOL(); printf(versionstring); noonl(); continue; /* visual */ case 'i': tail("visual"); if (inopen) { c = 'e'; goto editcmd; } vop(); pflag = 0; nochng(); continue; } /* v */ tail("v"); global(0); nochng(); continue; /* write */ case 'w': c = peekchar(); tail(c == 'q' ? "wq" : "write"); wq: if (skipwh() && peekchar() == '!') { pofix(); ignchar(); setall(); unix0(0); filter(1); } else { setall(); wop(1); nochng(); } if (c == 'q') goto quit; continue; /* xit */ case 'x': tail("xit"); if (!chng) goto quit; c = 'q'; goto wq; /* yank */ case 'y': tail("yank"); c = cmdreg(); setcount(); eol(); vmacchng(0); if (c) YANKreg(c); else yank(); continue; /* z */ case 'z': zop(0); pflag = 0; continue; /* * */ /* @ */ case '*': case '@': c = getchar(); if (c=='\n' || c=='\r') ungetchar(c); if (any(c, "@*\n\r")) c = lastmac; if (isupper(c)) c = tolower(c); if (!islower(c)) error("Bad register"); newline(); setdot(); cmdmac(c); continue; /* | */ case '|': endline = 0; goto caseline; /* \n */ case '\n': endline = 1; caseline: notempty(); if (addr2 == 0) { if (UP != NOSTR && c == '\n' && !inglobal) c = CTRL('k'); if (inglobal) addr1 = addr2 = dot; else { if (dot == dol) error("At EOF|At end-of-file"); addr1 = addr2 = dot + 1; } } setdot(); nonzero(); if (seensemi) addr1 = addr2; getline(*addr1); if (c == CTRL('k')) { flush1(); destline--; if (hadpr) shudclob = 1; } plines(addr1, addr2, 1); continue; /* " */ case '"': comment(); continue; /* # */ case '#': numberit: setCNL(); ignorf(setnumb(1)); pflag = 0; goto print; /* = */ case '=': newline(); setall(); if (inglobal == 2) pofix(); printf("%d", lineno(addr2)); noonl(); continue; /* ! */ case '!': if (addr2 != 0) { vmacchng(0); unix0(0); setdot(); filter(2); } else { unix0(1); pofix(); putpad(TE); flush(); unixwt(1, unixex("-c", uxb, 0, 0)); vclrech(1); /* vcontin(0); */ nochng(); } continue; /* < */ /* > */ case '<': case '>': for (cnt = 1; peekchar() == c; cnt++) ignchar(); setCNL(); vmacchng(0); shift(c, cnt); continue; /* ^D */ /* EOF */ case CTRL('d'): case EOF: if (exitoneof) { if (addr2 != 0) dot = addr2; return; } if (!isatty(0)) { if (intty) /* * Chtty sys call at UCB may cause a * input which was a tty to suddenly be * turned into /dev/null. */ onhup(); return; } if (addr2 != 0) { setlastchar('\n'); putnl(); } if (dol == zero) { if (addr2 == 0) putnl(); notempty(); } ungetchar(EOF); zop(hadpr); continue; default: if (!isalpha(c)) break; ungetchar(c); tailprim("", 0, 0); } error("What?|Unknown command character '%c'", c); } }