# This is a shell archive. Remove anything before this line, # then unpack it by saving it in a file and typing "sh file". # # Wrapped by tralfaz!ove on Wed Jan 13 14:06:45 PST 1988 # Contents: isearc.c line.c lock.c uehelp uecomp uelink echo x - isearc.c sed 's/^@//' > "isearc.c" <<'@//E*O*F isearc.c//' /* * The functions in this file implement commands that perform incremental * searches in the forward and backward directions. This "ISearch" command * is intended to emulate the same command from the original EMACS * implementation (ITS). Contains references to routines internal to * SEARCH.C. * * REVISION HISTORY: * * D. R. Banks 9-May-86 * - added ITS EMACSlike ISearch * * John M. Gamble 5-Oct-86 * - Made iterative search use search.c's scanner() routine. * This allowed the elimination of bakscan(). * - Put isearch constants into esearc.h * - Eliminated the passing of 'status' to scanmore() and * checknext(), since there were no circumstances where * it ever equalled FALSE. */ #include #include "estruc.h" #include "edef.h" #include "esearc.h" #if ISRCH extern int scanner(); /* Handy search routine */ extern int eq(); /* Compare chars, match case */ extern char tap[]; /* Reverse pattern array.*/ /* A couple of "own" variables for re-eat */ int (*saved_get_char)(); /* Get character routine */ int eaten_char = -1; /* Re-eaten char */ /* A couple more "own" variables for the command string */ int cmd_buff[CMDBUFLEN]; /* Save the command args here */ int cmd_offset; /* Current offset into command buff */ int cmd_reexecute = -1; /* > 0 if re-executing command */ /* * Subroutine to do incremental reverse search. It actually uses the * same code as the normal incremental search, as both can go both ways. */ int risearch(f, n) { LINE *curline; /* Current line on entry */ int curoff; /* Current offset on entry */ /* remember the initial . on entry: */ curline = curwp->w_dotp; /* Save the current line pointer */ curoff = curwp->w_doto; /* Save the current offset */ /* Make sure the search doesn't match where we already are: */ backchar(TRUE, 1); /* Back up a character */ #if CRAY /* immediate mode on */ sends("\\(I)") ; #endif if (!(isearch(f, -n))) /* Call ISearch backwards */ { /* If error in search: */ curwp->w_dotp = curline; /* Reset the line pointer */ curwp->w_doto = curoff; /* and the offset to original value */ curwp->w_flag |= WFMOVE; /* Say we've moved */ update(FALSE); /* And force an update */ mlwrite ("[search failed]"); /* Say we died */ } else mlerase (); /* If happy, just erase the cmd line */ #if CRAY /* immediate mode off */ sends("\\(i)") ; #endif } /* Again, but for the forward direction */ int fisearch(f, n) { LINE *curline; /* Current line on entry */ int curoff; /* Current offset on entry */ /* remember the initial . on entry: */ curline = curwp->w_dotp; /* Save the current line pointer */ curoff = curwp->w_doto; /* Save the current offset */ /* do the search */ #if CRAY /* immediate mode on */ sends("\\(I)") ; #endif if (!(isearch(f, n))) /* Call ISearch forwards */ { /* If error in search: */ curwp->w_dotp = curline; /* Reset the line pointer */ curwp->w_doto = curoff; /* and the offset to original value */ curwp->w_flag |= WFMOVE; /* Say we've moved */ update(FALSE); /* And force an update */ mlwrite ("[search failed]"); /* Say we died */ } else mlerase (); /* If happy, just erase the cmd line */ #if CRAY /* immediate mode off */ sends("\\(i)") ; #endif } /* * Subroutine to do an incremental search. In general, this works similarly * to the older micro-emacs search function, except that the search happens * as each character is typed, with the screen and cursor updated with each * new search character. Because of this, the CRAY version must tell the * workstation to switch to immediate mode, so that every character is * flushed immediately. * * While searching forward, each successive character will leave the cursor * at the end of the entire matched string. Typing a Control-S or Control-X * will cause the next occurrence of the string to be searched for (where the * next occurrence does NOT overlap the current occurrence). A Control-R will * change to a backwards search, META will terminate the search and Control-G * will abort the search. Rubout will back up to the previous match of the * string, or if the starting point is reached first, it will delete the * last character from the search string. * * While searching backward, each successive character will leave the cursor * at the beginning of the matched string. Typing a Control-R will search * backward for the next occurrence of the string. Control-S or Control-X * will revert the search to the forward direction. In general, the reverse * incremental search is just like the forward incremental search inverted. * * In all cases, if the search fails, the user will be feeped, and the search * will stall until the pattern string is edited back into something that * exists (or until the search is aborted). */ isearch(f, n) { int status; /* Search status */ int col; /* prompt column */ register int cpos; /* character number in search string */ register int c; /* current input character */ register int expc; /* function expanded input char */ char pat_save[NPAT]; /* Saved copy of the old pattern str */ LINE *curline; /* Current line on entry */ int curoff; /* Current offset on entry */ int init_direction; /* The initial search direction */ /* Initialize starting conditions */ cmd_reexecute = -1; /* We're not re-executing (yet?) */ cmd_offset = 0; /* Start at the beginning of the buff */ cmd_buff[0] = '\0'; /* Init the command buffer */ strncpy (pat_save, pat, NPAT); /* Save the old pattern string */ curline = curwp->w_dotp; /* Save the current line pointer */ curoff = curwp->w_doto; /* Save the current offset */ init_direction = n; /* Save the initial search direction */ /* This is a good place to start a re-execution: */ start_over: /* ask the user for the text of a pattern */ col = promptpattern("ISearch: "); /* Prompt, remember the col */ cpos = 0; /* Start afresh */ status = TRUE; /* Assume everything's cool */ /* Get the first character in the pattern. If we get an initial Control-S or Control-R, re-use the old search string and find the first occurrence */ c = ectoc(expc = get_char()); /* Get the first character */ if ((c == IS_FORWARD) || (c == IS_REVERSE) || (c == IS_VMSFORW)) /* Reuse old search string? */ { for (cpos = 0; pat[cpos] != 0; cpos++) /* Yup, find the length */ col = echochar(pat[cpos],col); /* and re-echo the string */ if (c == IS_REVERSE) { /* forward search? */ n = -1; /* No, search in reverse */ backchar (TRUE, 1); /* Be defensive about EOB */ } else n = 1; /* Yes, search forward */ status = scanmore(pat, n); /* Do the search */ c = ectoc(expc = get_char()); /* Get another character */ } /* Top of the per character loop */ for (;;) /* ISearch per character loop */ { /* Check for special characters first: */ /* Most cases here change the search */ if (expc == metac) /* Want to quit searching? */ return (TRUE); /* Quit searching now */ switch (c) /* dispatch on the input char */ { case IS_ABORT: /* If abort search request */ return(FALSE); /* Quit searching again */ case IS_REVERSE: /* If backward search */ case IS_FORWARD: /* If forward search */ case IS_VMSFORW: /* of either flavor */ if (c == IS_REVERSE) /* If reverse search */ n = -1; /* Set the reverse direction */ else /* Otherwise, */ n = 1; /* go forward */ status = scanmore(pat, n); /* Start the search again */ c = ectoc(expc = get_char()); /* Get the next char */ continue; /* Go continue with the search*/ case IS_NEWLINE: /* Carriage return */ c = '\n'; /* Make it a new line */ break; /* Make sure we use it */ case IS_QUOTE: /* Quote character */ case IS_VMSQUOTE: /* of either variety */ c = ectoc(expc = get_char()); /* Get the next char */ case IS_TAB: /* Generically allowed */ case '\n': /* controlled characters */ break; /* Make sure we use it */ case IS_BACKSP: /* If a backspace: */ case IS_RUBOUT: /* or if a Rubout: */ if (cmd_offset <= 1) /* Anything to delete? */ return (TRUE); /* No, just exit */ --cmd_offset; /* Back up over the Rubout */ cmd_buff[--cmd_offset] = '\0'; /* Yes, delete last char */ curwp->w_dotp = curline; /* Reset the line pointer */ curwp->w_doto = curoff; /* and the offset */ n = init_direction; /* Reset the search direction */ strncpy (pat, pat_save, NPAT); /* Restore the old search str */ cmd_reexecute = 0; /* Start the whole mess over */ goto start_over; /* Let it take care of itself */ /* Presumably a quasi-normal character comes here */ default: /* All other chars */ if (c < ' ') /* Is it printable? */ { /* Nope. */ reeat (c); /* Re-eat the char */ return (TRUE); /* And return the last status */ } } /* Switch */ /* I guess we got something to search for, so search for it */ pat[cpos++] = c; /* put the char in the buffer */ if (cpos >= NPAT) /* too many chars in string? */ { /* Yup. Complain about it */ mlwrite("? Search string too long"); return(TRUE); /* Return an error */ } pat[cpos] = 0; /* null terminate the buffer */ col = echochar(c,col); /* Echo the character */ if (!status) { /* If we lost last time */ TTputc(BELL); /* Feep again */ TTflush(); /* see that the feep feeps */ } else /* Otherwise, we must have won*/ if (!(status = checknext(c, pat, n))) /* See if match */ status = scanmore(pat, n); /* or find the next match */ c = ectoc(expc = get_char()); /* Get the next char */ } /* for {;;} */ } /* * Trivial routine to insure that the next character in the search string is * still true to whatever we're pointing to in the buffer. This routine will * not attempt to move the "point" if the match fails, although it will * implicitly move the "point" if we're forward searching, and find a match, * since that's the way forward isearch works. * * If the compare fails, we return FALSE and assume the caller will call * scanmore or something. */ int checknext (chr, patrn, dir) /* Check next character in search string */ char chr; /* Next char to look for */ char *patrn; /* The entire search string (incl chr) */ int dir; /* Search direction */ { register LINE *curline; /* current line during scan */ register int curoff; /* position within current line */ register int buffchar; /* character at current position */ int status; /* how well things go */ /* setup the local scan pointer to current "." */ curline = curwp->w_dotp; /* Get the current line structure */ curoff = curwp->w_doto; /* Get the offset within that line */ if (dir > 0) /* If searching forward */ { if (curoff == llength(curline)) /* If at end of line */ { curline = lforw(curline); /* Skip to the next line */ if (curline == curbp->b_linep) return (FALSE); /* Abort if at end of buffer */ curoff = 0; /* Start at the beginning of the line */ buffchar = '\n'; /* And say the next char is NL */ } else buffchar = lgetc(curline, curoff++); /* Get the next char */ if (status = eq(buffchar, chr)) /* Is it what we're looking for? */ { curwp->w_dotp = curline; /* Yes, set the buffer's point */ curwp->w_doto = curoff; /* to the matched character */ curwp->w_flag |= WFMOVE; /* Say that we've moved */ } return (status); /* And return the status */ } else /* Else, if reverse search: */ return (match_pat (patrn)); /* See if we're in the right place */ } /* * This hack will search for the next occurrence of in the buffer, either * forward or backward. It is called with the status of the prior search * attempt, so that it knows not to bother if it didn't work last time. If * we can't find any more matches, "point" is left where it was before. If * we do find a match, "point" will be at the end of the matched string for * forward searches and at the beginning of the matched string for reverse * searches. */ int scanmore(patrn, dir) /* search forward or back for a pattern */ char *patrn; /* string to scan for */ int dir; /* direction to search */ { int sts; /* search status */ if (dir < 0) /* reverse search? */ { rvstrcpy(tap, patrn); /* Put reversed string in tap */ sts = scanner(tap, REVERSE, PTBEG); } else sts = scanner(patrn, FORWARD, PTEND); /* Nope. Go forward */ if (!sts) { TTputc(BELL); /* Feep if search fails */ TTflush(); /* see that the feep feeps */ } return(sts); /* else, don't even try */ } /* * The following is a worker subroutine used by the reverse search. It * compares the pattern string with the characters at "." for equality. If * any characters mismatch, it will return FALSE. * * This isn't used for forward searches, because forward searches leave "." * at the end of the search string (instead of in front), so all that needs to * be done is match the last char input. */ int match_pat (patrn) /* See if the pattern string matches string at "." */ char *patrn; /* String to match to buffer */ { register int i; /* Generic loop index/offset */ register int buffchar; /* character at current position */ register LINE *curline; /* current line during scan */ register int curoff; /* position within current line */ /* setup the local scan pointer to current "." */ curline = curwp->w_dotp; /* Get the current line structure */ curoff = curwp->w_doto; /* Get the offset within that line */ /* top of per character compare loop: */ for (i = 0; i < strlen(patrn); i++) /* Loop for all characters in patrn */ { if (curoff == llength(curline)) /* If at end of line */ { curline = lforw(curline); /* Skip to the next line */ curoff = 0; /* Start at the beginning of the line */ if (curline == curbp->b_linep) return (FALSE); /* Abort if at end of buffer */ buffchar = '\n'; /* And say the next char is NL */ } else buffchar = lgetc(curline, curoff++); /* Get the next char */ if (!eq(buffchar, patrn[i])) /* Is it what we're looking for? */ return (FALSE); /* Nope, just punt it then */ } return (TRUE); /* Everything matched? Let's celebrate*/ } /* Routine to prompt for I-Search string. */ int promptpattern(prompt) char *prompt; { char tpat[NPAT+20]; strcpy(tpat, prompt); /* copy prompt to output string */ strcat(tpat, " ["); /* build new prompt string */ expandp(pat, &tpat[strlen(tpat)], NPAT/2); /* add old pattern */ strcat(tpat, "]: "); /* check to see if we are executing a command line */ if (!clexec) { mlwrite(tpat); } return(strlen(tpat)); } /* routine to echo i-search characters */ int echochar(c,col) int c; /* character to be echoed */ int col; /* column to be echoed in */ { movecursor(term.t_nrow,col); /* Position the cursor */ if ((c < ' ') || (c == 0x7F)) /* Control character? */ { switch (c) /* Yes, dispatch special cases*/ { case '\n': /* Newline */ TTputc('<'); TTputc('N'); TTputc('L'); TTputc('>'); col += 3; break; case '\t': /* Tab */ TTputc('<'); TTputc('T'); TTputc('A'); TTputc('B'); TTputc('>'); col += 4; break; case 0x7F: /* Rubout: */ TTputc('^'); /* Output a funny looking */ TTputc('?'); /* indication of Rubout */ col++; /* Count the extra char */ break; default: /* Vanilla control char */ TTputc('^'); /* Yes, output prefix */ TTputc(c+0x40); /* Make it "^X" */ col++; /* Count this char */ } } else TTputc(c); /* Otherwise, output raw char */ TTflush(); /* Flush the output */ return(++col); /* return the new column no */ } /* * Routine to get the next character from the input stream. If we're reading * from the real terminal, force a screen update before we get the char. * Otherwise, we must be re-executing the command string, so just return the * next character. */ int get_char () { int c; /* A place to get a character */ /* See if we're re-executing: */ if (cmd_reexecute >= 0) /* Is there an offset? */ if ((c = cmd_buff[cmd_reexecute++]) != 0) return (c); /* Yes, return any character */ /* We're not re-executing (or aren't any more). Try for a real char */ cmd_reexecute = -1; /* Say we're in real mode again */ update(FALSE); /* Pretty up the screen */ if (cmd_offset >= CMDBUFLEN-1) /* If we're getting too big ... */ { mlwrite ("? command too long"); /* Complain loudly and bitterly */ return (metac); /* And force a quit */ } c = get1key(); /* Get the next character */ cmd_buff[cmd_offset++] = c; /* Save the char for next time */ cmd_buff[cmd_offset] = '\0';/* And terminate the buffer */ return (c); /* Return the character */ } /* * Hacky routine to re-eat a character. This will save the character to be * re-eaten by redirecting the input call to a routine here. Hack, etc. */ /* Come here on the next term.t_getchar call: */ int uneat() { int c; term.t_getchar = saved_get_char; /* restore the routine address */ c = eaten_char; /* Get the re-eaten char */ eaten_char = -1; /* Clear the old char */ return(c); /* and return the last char */ } int reeat(c) int c; { if (eaten_char != -1) /* If we've already been here */ return (NULL); /* Don't do it again */ eaten_char = c; /* Else, save the char for later */ saved_get_char = term.t_getchar; /* Save the char get routine */ term.t_getchar = uneat; /* Replace it with ours */ } #else isearch() { } #endif @//E*O*F isearc.c// chmod u=rw,g=r,o=r isearc.c echo x - line.c sed 's/^@//' > "line.c" <<'@//E*O*F line.c//' /* * The functions in this file are a general set of line management utilities. * They are the only routines that touch the text. They also touch the buffer * and window structures, to make sure that the necessary updating gets done. * There are routines in this file that handle the kill buffer too. It isn't * here for any good reason. * * Note that this code only updates the dot and mark values in the window list. * Since all the code acts on the current window, the buffer that we are * editing must be being displayed, which means that "b_nwnd" is non zero, * which means that the dot and mark values in the buffer headers are nonsense. */ #include #include "estruc.h" #include "edef.h" #if MEGAMAX overlay "line" #endif KILL *ykbuf; /* ptr to current kill buffer chunk being yanked */ int ykboff; /* offset into that chunk */ /* * This routine allocates a block of memory large enough to hold a LINE * containing "used" characters. The block is always rounded up a bit. Return * a pointer to the new block, or NULL if there isn't any memory left. Print a * message in the message line if no space. */ LINE * lalloc(used) register int used; { register LINE *lp; register int size; char *malloc(); size = (used+NBLOCK-1) & ~(NBLOCK-1); if (size == 0) /* Assume that an empty */ size = NBLOCK; /* line is for type-in. */ if ((lp = (LINE *) malloc(sizeof(LINE)+size)) == NULL) { mlwrite("Cannot allocate %d bytes", size); return (NULL); } lp->l_size = size; lp->l_used = used; return (lp); } /* * Delete line "lp". Fix all of the links that might point at it (they are * moved to offset 0 of the next line. Unlink the line from whatever buffer it * might be in. Release the memory. The buffers are updated too; the magic * conditions described in the above comments don't hold here. */ lfree(lp) register LINE *lp; { register BUFFER *bp; register WINDOW *wp; wp = wheadp; while (wp != NULL) { if (wp->w_linep == lp) wp->w_linep = lp->l_fp; if (wp->w_dotp == lp) { wp->w_dotp = lp->l_fp; wp->w_doto = 0; } if (wp->w_markp == lp) { wp->w_markp = lp->l_fp; wp->w_marko = 0; } wp = wp->w_wndp; } bp = bheadp; while (bp != NULL) { if (bp->b_nwnd == 0) { if (bp->b_dotp == lp) { bp->b_dotp = lp->l_fp; bp->b_doto = 0; } if (bp->b_markp == lp) { bp->b_markp = lp->l_fp; bp->b_marko = 0; } } bp = bp->b_bufp; } lp->l_bp->l_fp = lp->l_fp; lp->l_fp->l_bp = lp->l_bp; free((char *) lp); } /* * This routine gets called when a character is changed in place in the current * buffer. It updates all of the required flags in the buffer and window * system. The flag used is passed as an argument; if the buffer is being * displayed in more than 1 window we change EDIT t HARD. Set MODE if the * mode line needs to be updated (the "*" has to be set). */ lchange(flag) register int flag; { register WINDOW *wp; if (curbp->b_nwnd != 1) /* Ensure hard. */ flag = WFHARD; if ((curbp->b_flag&BFCHG) == 0) { /* First change, so */ flag |= WFMODE; /* update mode lines. */ curbp->b_flag |= BFCHG; } wp = wheadp; while (wp != NULL) { if (wp->w_bufp == curbp) wp->w_flag |= flag; wp = wp->w_wndp; } } insspace(f, n) /* insert spaces forward into text */ int f, n; /* default flag and numeric argument */ { linsert(n, ' '); backchar(f, n); } /* * Insert "n" copies of the character "c" at the current location of dot. In * the easy case all that happens is the text is stored in the line. In the * hard case, the line has to be reallocated. When the window list is updated, * take special care; I screwed it up once. You always update dot in the * current window. You update mark, and a dot in another window, if it is * greater than the place where you did the insert. Return TRUE if all is * well, and FALSE on errors. */ linsert(n, c) { register char *cp1; register char *cp2; register LINE *lp1; register LINE *lp2; register LINE *lp3; register int doto; register int i; register WINDOW *wp; /* test */ /*char mybuf[81] ; for (i=0; i<80; i++) mybuf[i] = curwp->w_dotp->l_text[i] ; mybuf[80] = NULL ; printf("B<%s>\n", mybuf) ; */ /*end test */ if (curbp->b_mode&MDVIEW) /* don't allow this command if */ return(rdonly()); /* we are in read only mode */ lchange(WFEDIT); lp1 = curwp->w_dotp; /* Current line */ if (lp1 == curbp->b_linep) { /* At the end: special */ if (curwp->w_doto != 0) { mlwrite("bug: linsert"); return (FALSE); } if ((lp2=lalloc(n)) == NULL) /* Allocate new line */ return (FALSE); lp3 = lp1->l_bp; /* Previous line */ lp3->l_fp = lp2; /* Link in */ lp2->l_fp = lp1; lp1->l_bp = lp2; lp2->l_bp = lp3; for (i=0; il_text[i] = c; curwp->w_dotp = lp2; curwp->w_doto = n; return (TRUE); } doto = curwp->w_doto; /* Save for later. */ if (lp1->l_used+n > lp1->l_size) { /* Hard: reallocate */ if ((lp2=lalloc(lp1->l_used+n)) == NULL) return (FALSE); cp1 = &lp1->l_text[0]; cp2 = &lp2->l_text[0]; while (cp1 != &lp1->l_text[doto]) *cp2++ = *cp1++; cp2 += n; while (cp1 != &lp1->l_text[lp1->l_used]) *cp2++ = *cp1++; lp1->l_bp->l_fp = lp2; lp2->l_fp = lp1->l_fp; lp1->l_fp->l_bp = lp2; lp2->l_bp = lp1->l_bp; free((char *) lp1); } else { /* Easy: in place */ lp2 = lp1; /* Pretend new line */ lp2->l_used += n; cp2 = &lp1->l_text[lp1->l_used]; cp1 = cp2-n; while (cp1 != &lp1->l_text[doto]) *--cp2 = *--cp1; } for (i=0; il_text[doto+i] = c; wp = wheadp; /* Update windows */ while (wp != NULL) { if (wp->w_linep == lp1) wp->w_linep = lp2; if (wp->w_dotp == lp1) { wp->w_dotp = lp2; if (wp==curwp || wp->w_doto>doto) wp->w_doto += n; } if (wp->w_markp == lp1) { wp->w_markp = lp2; if (wp->w_marko > doto) wp->w_marko += n; } wp = wp->w_wndp; } /* test */ /*for (i=0; i<80; i++) mybuf[i] = curwp->w_dotp->l_text[i] ; mybuf[80] = NULL ; printf("A<%s>\n", mybuf) ; */ /*end test */ return (TRUE); } /* * Insert a newline into the buffer at the current location of dot in the * current window. The funny ass-backwards way it does things is not a botch; * it just makes the last line in the file not a special case. Return TRUE if * everything works out and FALSE on error (memory allocation failure). The * update of dot and mark is a bit easier then in the above case, because the * split forces more updating. */ lnewline() { register char *cp1; register char *cp2; register LINE *lp1; register LINE *lp2; register int doto; register WINDOW *wp; if (curbp->b_mode&MDVIEW) /* don't allow this command if */ return(rdonly()); /* we are in read only mode */ lchange(WFHARD); lp1 = curwp->w_dotp; /* Get the address and */ doto = curwp->w_doto; /* offset of "." */ if ((lp2=lalloc(doto)) == NULL) /* New first half line */ return (FALSE); cp1 = &lp1->l_text[0]; /* Shuffle text around */ cp2 = &lp2->l_text[0]; while (cp1 != &lp1->l_text[doto]) *cp2++ = *cp1++; cp2 = &lp1->l_text[0]; while (cp1 != &lp1->l_text[lp1->l_used]) *cp2++ = *cp1++; lp1->l_used -= doto; lp2->l_bp = lp1->l_bp; lp1->l_bp = lp2; lp2->l_bp->l_fp = lp2; lp2->l_fp = lp1; wp = wheadp; /* Windows */ while (wp != NULL) { if (wp->w_linep == lp1) wp->w_linep = lp2; if (wp->w_dotp == lp1) { if (wp->w_doto < doto) wp->w_dotp = lp2; else wp->w_doto -= doto; } if (wp->w_markp == lp1) { if (wp->w_marko < doto) wp->w_markp = lp2; else wp->w_marko -= doto; } wp = wp->w_wndp; } return (TRUE); } /* * This function deletes "n" bytes, starting at dot. It understands how do deal * with end of lines, etc. It returns TRUE if all of the characters were * deleted, and FALSE if they were not (because dot ran into the end of the * buffer. The "kflag" is TRUE if the text should be put in the kill buffer. */ ldelete(n, kflag) long n; /* # of chars to delete */ int kflag; /* put killed text in kill buffer flag */ { register char *cp1; register char *cp2; register LINE *dotp; register int doto; register int chunk; register WINDOW *wp; if (curbp->b_mode&MDVIEW) /* don't allow this command if */ return(rdonly()); /* we are in read only mode */ while (n != 0) { dotp = curwp->w_dotp; doto = curwp->w_doto; if (dotp == curbp->b_linep) /* Hit end of buffer. */ return (FALSE); chunk = dotp->l_used-doto; /* Size of chunk. */ if (chunk > n) chunk = n; if (chunk == 0) { /* End of line, merge. */ lchange(WFHARD); if (ldelnewline() == FALSE || (kflag!=FALSE && kinsert('\n')==FALSE)) return (FALSE); --n; continue; } lchange(WFEDIT); cp1 = &dotp->l_text[doto]; /* Scrunch text. */ cp2 = cp1 + chunk; if (kflag != FALSE) { /* Kill? */ while (cp1 != cp2) { if (kinsert(*cp1) == FALSE) return (FALSE); ++cp1; } cp1 = &dotp->l_text[doto]; } while (cp2 != &dotp->l_text[dotp->l_used]) *cp1++ = *cp2++; dotp->l_used -= chunk; wp = wheadp; /* Fix windows */ while (wp != NULL) { if (wp->w_dotp==dotp && wp->w_doto>=doto) { wp->w_doto -= chunk; if (wp->w_doto < doto) wp->w_doto = doto; } if (wp->w_markp==dotp && wp->w_marko>=doto) { wp->w_marko -= chunk; if (wp->w_marko < doto) wp->w_marko = doto; } wp = wp->w_wndp; } n -= chunk; } return (TRUE); } /* * Delete a newline. Join the current line with the next line. If the next line * is the magic header line always return TRUE; merging the last line with the * header line can be thought of as always being a successful operation, even * if nothing is done, and this makes the kill buffer work "right". Easy cases * can be done by shuffling data around. Hard cases require that lines be moved * about in memory. Return FALSE on error and TRUE if all looks ok. Called by * "ldelete" only. */ ldelnewline() { register char *cp1; register char *cp2; register LINE *lp1; register LINE *lp2; register LINE *lp3; register WINDOW *wp; if (curbp->b_mode&MDVIEW) /* don't allow this command if */ return(rdonly()); /* we are in read only mode */ lp1 = curwp->w_dotp; lp2 = lp1->l_fp; if (lp2 == curbp->b_linep) { /* At the buffer end. */ if (lp1->l_used == 0) /* Blank line. */ lfree(lp1); return (TRUE); } if (lp2->l_used <= lp1->l_size-lp1->l_used) { cp1 = &lp1->l_text[lp1->l_used]; cp2 = &lp2->l_text[0]; while (cp2 != &lp2->l_text[lp2->l_used]) *cp1++ = *cp2++; wp = wheadp; while (wp != NULL) { if (wp->w_linep == lp2) wp->w_linep = lp1; if (wp->w_dotp == lp2) { wp->w_dotp = lp1; wp->w_doto += lp1->l_used; } if (wp->w_markp == lp2) { wp->w_markp = lp1; wp->w_marko += lp1->l_used; } wp = wp->w_wndp; } lp1->l_used += lp2->l_used; lp1->l_fp = lp2->l_fp; lp2->l_fp->l_bp = lp1; free((char *) lp2); return (TRUE); } if ((lp3=lalloc(lp1->l_used+lp2->l_used)) == NULL) return (FALSE); cp1 = &lp1->l_text[0]; cp2 = &lp3->l_text[0]; while (cp1 != &lp1->l_text[lp1->l_used]) *cp2++ = *cp1++; cp1 = &lp2->l_text[0]; while (cp1 != &lp2->l_text[lp2->l_used]) *cp2++ = *cp1++; lp1->l_bp->l_fp = lp3; lp3->l_fp = lp2->l_fp; lp2->l_fp->l_bp = lp3; lp3->l_bp = lp1->l_bp; wp = wheadp; while (wp != NULL) { if (wp->w_linep==lp1 || wp->w_linep==lp2) wp->w_linep = lp3; if (wp->w_dotp == lp1) wp->w_dotp = lp3; else if (wp->w_dotp == lp2) { wp->w_dotp = lp3; wp->w_doto += lp1->l_used; } if (wp->w_markp == lp1) wp->w_markp = lp3; else if (wp->w_markp == lp2) { wp->w_markp = lp3; wp->w_marko += lp1->l_used; } wp = wp->w_wndp; } free((char *) lp1); free((char *) lp2); return (TRUE); } /* * Delete all of the text saved in the kill buffer. Called by commands when a * new kill context is being created. The kill buffer array is released, just * in case the buffer has grown to immense size. No errors. */ kdelete() { KILL *kp; /* ptr to scan kill buffer chunk list */ if (kbufh != NULL) { /* first, delete all the chunks */ kbufp = kbufh; while (kbufp != NULL) { kp = kbufp->d_next; free(kbufp); kbufp = kp; } /* and reset all the kill buffer pointers */ kbufh = kbufp = NULL; kused = KBLOCK; } } /* * Insert a character to the kill buffer, allocating new chunks as needed. * Return TRUE if all is well, and FALSE on errors. */ kinsert(c) int c; /* character to insert in the kill buffer */ { KILL *nchunk; /* ptr to newly malloced chunk */ /* check to see if we need a new chunk */ if (kused >= KBLOCK) { if ((nchunk = (KILL *)malloc(sizeof(KILL))) == NULL) return(FALSE); if (kbufh == NULL) /* set head ptr if first time */ kbufh = nchunk; if (kbufp != NULL) /* point the current to this new one */ kbufp->d_next = nchunk; kbufp = nchunk; kbufp->d_next = NULL; kused = 0; } /* and now insert the character */ kbufp->d_chunk[kused++] = c; return(TRUE); } /* * Yank text back from the kill buffer. This is really easy. All of the work * is done by the standard insert routines. All you do is run the loop, and * check for errors. Bound to "C-Y". */ yank(f, n) { register int c; register int i; register char *sp; /* pointer into string to insert */ KILL *kp; /* pointer into kill buffer */ if (curbp->b_mode&MDVIEW) /* don't allow this command if */ return(rdonly()); /* we are in read only mode */ if (n < 0) return (FALSE); /* make sure there is something to yank */ if (kbufh == NULL) return(TRUE); /* not an error, just nothing */ /* for each time.... */ while (n--) { kp = kbufh; while (kp != NULL) { if (kp->d_next == NULL) i = kused; else i = KBLOCK; sp = kp->d_chunk; while (i--) { if ((c = *sp++) == '\n') { if (lnewline() == FALSE) return (FALSE); } else { if (linsert(1, c) == FALSE) return (FALSE); } } kp = kp->d_next; } } return (TRUE); } @//E*O*F line.c// chmod u=rw,g=r,o=r line.c echo x - lock.c sed 's/^@//' > "lock.c" <<'@//E*O*F lock.c//' /* LOCK: File locking command routines for MicroEMACS written by Daniel Lawrence */ #include #include "estruc.h" #include "edef.h" #if FILOCK #if BSD #include extern int sys_nerr; /* number of system error messages defined */ extern char *sys_errlist[]; /* list of message texts */ extern int errno; /* current error */ char *lname[NLOCKS]; /* names of all locked files */ int numlocks; /* # of current locks active */ /* lockchk: check a file for locking and add it to the list */ lockchk(fname) char *fname; /* file to check for a lock */ { register int i; /* loop indexes */ register int status; /* return status */ char *undolock(); /* check to see if that file is already locked here */ if (numlocks > 0) for (i=0; i < numlocks; ++i) if (strcmp(fname, lname[i]) == 0) return(TRUE); /* if we have a full locking table, bitch and leave */ if (numlocks == NLOCKS) { mlwrite("LOCK ERROR: Lock table full"); return(ABORT); } /* next, try to lock it */ status = lock(fname); if (status == ABORT) /* file is locked, no override */ return(ABORT); if (status == FALSE) /* locked, overriden, dont add to table */ return(TRUE); /* we have now locked it, add it to our table */ lname[++numlocks - 1] = (char *)malloc(strlen(fname) + 1); if (lname[numlocks - 1] == NULL) { /* malloc failure */ undolock(fname); /* free the lock */ mlwrite("Cannot lock, out of memory"); --numlocks; return(ABORT); } /* everthing is cool, add it to the table */ strcpy(lname[numlocks-1], fname); return(TRUE); } /* lockrel: release all the file locks so others may edit */ lockrel() { register int i; /* loop index */ register int status; /* status of locks */ register int s; /* status of one unlock */ status = TRUE; if (numlocks > 0) for (i=0; i < numlocks; ++i) { if ((s = unlock(lname[i])) != TRUE) status = s; free(lname[i]); } numlocks = 0; return(status); } /* lock: Check and lock a file from access by others returns TRUE = files was not locked and now is FALSE = file was locked and overridden ABORT = file was locked, abort command */ lock(fname) char *fname; /* file name to lock */ { register char *locker; /* lock error message */ register int status; /* return status */ char msg[NSTRING]; /* message string */ char *dolock(); /* attempt to lock the file */ locker = dolock(fname); if (locker == NULL) /* we win */ return(TRUE); /* file failed...abort */ if (strncmp(locker, "LOCK", 4) == 0) { lckerror(locker); return(ABORT); } /* someone else has it....override? */ strcpy(msg, "File in use by "); strcat(msg, locker); strcat(msg, ", overide?"); status = mlyesno(msg); /* ask them */ if (status == TRUE) return(FALSE); else return(ABORT); } /* unlock: Unlock a file this only warns the user if it fails */ unlock(fname) char *fname; /* file to unlock */ { register char *locker; /* undolock return string */ char *undolock(); /* unclock and return */ locker = undolock(fname); if (locker == NULL) return(TRUE); /* report the error and come back */ lckerror(locker); return(FALSE); } lckerror(errstr) /* report a lock error */ char *errstr; /* lock error string to print out */ { char obuf[NSTRING]; /* output buffer for error message */ strcpy(obuf, errstr); strcat(obuf, " - "); if (errno < sys_nerr) strcat(obuf, sys_errlist[errno]); else strcat(obuf, "[can not get system error message]"); mlwrite(obuf); } #endif #else lckhello() /* dummy function */ { } #endif @//E*O*F lock.c// chmod u=rw,g=r,o=r lock.c echo x - uehelp sed 's/^@//' > "uehelp" <<'@//E*O*F uehelp//' => Cray/Sun MicroEMACS 3.8 Help screens (9/18/87) M-? or Display this help window, ^ to remove it. M-A or Apropos. List commands related to a key word. ^V or Scroll down M-< or Begining of file ^Z or Scroll up M-> or End of file ----------------------------------------------------------------------- => (0) Notation **** the command is not implemented M- use the key prior to using another key ^A use control key at the same time as the A key function keys: right shifted right ^ control right top shifted top ^ control top ----------------------------------------------------------------------- => (1) MOVING THE CURSOR ^F Forward character M-F Forward word Keypad arrows ^B Backward character M-B Backward word are active! ^A Front of line M-G Goto a line ^E End of line ^N Next line M-N Front of paragraph ^P Previous line M-P End of paragraph ----------------------------------------------------------------------- => (2) MOUSE SUPPORT Left button: cut text. Press down, move to end of region, release. Middle button: set mark at mouse cursor. Right button: Yank back text from kill buffer to current mouse location. To move the text cursor, move the mouse cursor to the desired location and leave it motionless for ~1/5 second. ----------------------------------------------------------------------- => (3) DELETING & INSERTING <-- Delete previous character ^D Delete next character ^C Insert a space M-<-- Delete previous word M-D Delete next word ^K Close (delete) to end of line ----------------------------------------------------------------------- => (3a) MORE DELETING & INSERTING Insert a newline Advance to next tab stop ^J Insert a newline and indent M-^W Delete paragraph ^O Open (insert) line ^W Delete region between mark (set using M-) and cursor M-W Copy region to kill buffer ^X ^O Delete blank lines around cursor ----------------------------------------------------------------------- => (4) SEARCHING ^S Search forward from cursor position. ^R Reverse search from cursor position. ^X S Forward incremental search ^X R Reverse incremental search (note: Terminate ^S/^R search string with ESC ESC. Terminate an incremental search at the current location with an arrow key). ----------------------------------------------------------------------- => (5) REPLACING M-R Replace all instances of first typed-in string with second typed-in string. End the string with ESC ESC. M-^R Replace with query. Answer with: ^G cancel . exit to entry point ! replace the rest Y replace & continue ? Get a list of options N no replacement & continue ----------------------------------------------------------------------- => (6) CAPITALIZING & TRANSPOSING M-U UPPERCASE word M-C Capitalize word ^T Transpose characters M-L lowercase word ^X ^L lowercase region ^X ^U uppercase region ^Q Quote next entry, so control codes may be entered into text ----------------------------------------------------------------------- => (7) REGIONS & THE KILL BUFFER M- set MARK at current position ^X ^X eXchange mark and cursor A REGION will then be continuously-defined as the area between the mark and the current cursor position. The KILL BUFFER is the text which has been most recently saved or deleted. ----------------------------------------------------------------------- => (8) COPYING AND MOVING ^W Delete (Wipe) region M-W copy region to KILL buffer ^Y Yankback save buffer at cursor Generally, the procedure for copying or moving text is: 1) Mark a REGION using M- at beginning and cursor at end. 2) Delete it (with ^W) or copy it (with M-W) into the KILL buffer. 3) Move the cursor to the desired location and yank it back (with ^Y). ----------------------------------------------------------------------- => (9) MODES OF OPERATION ^X M Add mode in buffer M-M Add global mode ^X ^M Delete mode in buffer M-^M Delete global mode OVER Replaces (overwrites) rather than inserts characters **** WRAP Turns on word wrap (automatic carraige return). VIEW Allows viewing file without insertion and deletion. CMODE Automatic indenting for C program entry EXACT/MAGIC Changes how search and replace commands work (see next page) ----------------------------------------------------------------------- => (10) SEARCH AND REPLACE MODES EXACT Uppper/lower case is not ignored in searches MAGIC Regular pattern matching characters are active . Matches any one character * Matches any any number of the preceding character ^ Beginning of line [ ] Character class enclosure $ End of line \ Quote next character ----------------------------------------------------------------------- => (11) ON-SCREEN FORMATTING ^X F Set fill column Mn- Set tab spacing to n charecters between tabs stops M-Q Format paragraph so that text lies between margins ^X = Position report -- displays line number, char count, file size and character under cursor M-^C Count words/lines/chars in marked region ----------------------------------------------------------------------- => (12) MULTIPLE WINDOWS Many WINDOWS may be active at once on the screen. All windows may show different parts of the same buffer, or each may display a different one. ^X 2 ^ split the current window ^X O ^ Change to next window ^X 0 ^ delete current window ^X P ^ Change to previous window ^X 1 ^ delete all other windows M-^V ^ Page down next window M-^Z ^ Page up next window ----------------------------------------------------------------------- => (13) CONTROLLING WINDOWS AND THE SCREEN ^X ^ ^ Enlarge current window ^X W ^ Resize window to lines ^X ^Z ^ Shrink current window M-S Change screen to lines ^X ^N Move window down M-T Change screen to columns ^X ^P Move window up M-^L ^ Reposition window ^L Refresh the screen ----------------------------------------------------------------------- => (14) MULTIPLE BUFFERS A BUFFER is a named area containing a document being edited. Many buffers may be activated at once. ^X B Switch to another buffer. = use just-previous buffer ^X X Switch to next buffer in buffer list M-^N Change name of current buffer ^X K Delete a non-displayed buffer. ^X ^B Display buffer directory in a window ----------------------------------------------------------------------- => (15) READING FROM DISK ^X ^F Find file; read into a new buffer created from filename. (This is the usual way to begin editing a new file.) ^X ^R Read file into current buffer, erasing its previous contents. No new buffer will be created. ^X ^I Insert file into current buffer at cursor's location. ^X ^V Find a file to make current in VIEW mode ----------------------------------------------------------------------- => (16) SAVING TO DISK ^X ^S Save current buffer to disk ^X ^W Write current buffer to disk ^X N Change file name of current buffer M-Z Write out all changed buffers and exit MicroEMACS ----------------------------------------------------------------------- => (17) ACCESSING THE OPERATING SYSTEM **** ^X ! Send one command to the operating system and return **** ^X @ Pipe DOS command results to buffer **** ^X # Filter buffer through DOS filter program **** ^X C Start a new command processor under MicroEMACS **** ^X D Suspend MicroEMACS into the background (UNIX BSD4.2 only) ^X ^C Exit MicroEMACS ----------------------------------------------------------------------- => (18) KEY BINDINGS AND COMMANDS M-K Bind a key to a command M-A Describe a class of commands M-^K Unbind a key from a command ^X ? Describe command bound to a key M-X Execute a named (and possibly unbound) command {Describe-bindings} Display a list of all commands and key bindings to a buffer ----------------------------------------------------------------------- => (19) COMMAND EXECUTION Commands can be specified as command lines in the form: {command-name} {Execute-command-line} execute a typed in command line {Execute-buffer} executes commands lines in a buffer {Execute-file} executes command lines from a file {clear-message-line} clears the message line during execution M-~ clears the change flag for a buffer ----------------------------------------------------------------------- => (20) MACRO EXECUTION ^X ( Start recording keyboard macro ^X ) Stop recording keyboard macro ^X E Execute keyboard macro M- {store-macro} Start recording named macro !endm Stop recording named macro {execute-macro-n} Execute macro n (where n is from 1 to 20) ----------------------------------------------------------------------- => (21) SPECIAL KEYS ^G Cancel current command and return to top level of processing. ^U or Universal repeat. May be followed by an integer (default = 4) and repeats the next command that many times. M- Similar to ^U, but for this distributed implementation this should only be used for single digits. @//E*O*F uehelp// chmod u=rw,g=r,o=r uehelp echo x - uecomp sed 's/^@//' > "uecomp" <<'@//E*O*F uecomp//' * select printlog=uelog */ * hcc -c -Obcdefi ansi.c * hcc -c -Obcdefi basic.c * hcc -c -Obcdefi bind.c * hcc -c -Obcdefi buffer.c * hcc -c -Obcdefi displa.c * hcc -c -Obcdefi file.c * hcc -c -Obcdefi fileio.c * hcc -c -Obcdefi input.c * hcc -c -Obcdefi line.c * hcc -c -Obcdefi lock.c * hcc -c -Obcdefi main.c * hcc -c -Obcdefi random.c * hcc -c -Obcdefi region.c * hcc -c -Obcdefi search.c * hcc -c -Obcdefi spawn.c * hcc -c -Obcdefi termio.c * hcc -c -Obcdefi window.c * hcc -c -Obcdefi word.c * hcc -c -Obcdefi exec.c * hcc -c -Obcdefi eval.c * hcc -c -Obcdefi isearc.c * hcc -c -Obcdefi io.c */ */ make a library * destroy templib * build nl=templib, b=(ansi.o, basic.o, bind.o, buffer.o, displa.o) * build ol=templib, b=(file.o, fileio.o, input.o, line.o, lock.o, random.o),a * build ol=templib, b=(region.o, search.o, spawn.o, termio.o),a * build ol=templib, b=(window.o, word.o, exec.o, eval.o, isearc.o),a * build ol=templib, b=(io.o),a */ */ link em up * hcc -Obcdefi main.o -lib templib -lib clibt -o uemacs @//E*O*F uecomp// chmod u=rw,g=r,o=r uecomp echo x - uelink sed 's/^@//' > "uelink" <<'@//E*O*F uelink//' * select printlog=uelog */ * hcc -Obcdefi -c <1>.c */ make a library * destroy templib * build nl=templib, b=(ansi.o, basic.o, bind.o, buffer.o, displa.o) * build ol=templib, b=(file.o, fileio.o, input.o, line.o, lock.o, random.o),a * build ol=templib, b=(region.o, search.o, spawn.o, termio.o),a * build ol=templib, b=(window.o, word.o, exec.o, eval.o, isearc.o),a * build ol=templib, b=(io.o),a */ */ link em up * hcc -Obcdefi main.o -lib templib -lib clibt -o uemacs @//E*O*F uelink// chmod u=rw,g=r,o=r uelink exit 0