Usenet 1994 January/usenetsourcesnewsgroupsinfomagicjanuary1994.iso/sources/unix/volume6/uemacs3.7/part12

Internet Message Format | 1986-11-30 | 16.4 KB

Subject: v06i082:  MicroEmacs, Version 3.7 (uEmacs3.7), Part12/12
Newsgroups: mod.sources
Approved: [e-mail]

Submitted by: ihnp4!pur-ee!pur-phy!duncan!lawrence
Mod.sources: Volume 6, Issue 82
Archive-name: uEmacs/Part12

[  This is the last version of emacs that will be posted here for quite
   some time.  Anyone for a mod.sources.emacs?  --r$ ]

echo extracting - word.c
sed 's/^X//' > word.c << 'FRIDAY_NIGHT'
X/*
X * The routines in this file implement commands that work word or a
X * paragraph at a time.  There are all sorts of word mode commands.  If I
X * do any sentence mode commands, they are likely to be put in this file.
X */
X
X#include        <stdio.h>
X#include        "estruct.h"
X#include    "edef.h"
X
X/* Word wrap on n-spaces. Back-over whatever precedes the point on the current
X * line and stop on the first word-break or the beginning of the line. If we
X * reach the beginning of the line, jump back to the end of the word and start
X * a new line.  Otherwise, break the line at the word-break, eat it, and jump
X * back to the end of the word.
X * Returns TRUE on success, FALSE on errors.
X */
Xwrapword(n)
X
Xint n;
X
X{
X        register int cnt;    /* size of word wrapped to next line */
X    register int c;        /* charector temporary */
X
X    /* backup from the <NL> 1 char */
X        if (!backchar(0, 1))
X            return(FALSE);
X
X    /* back up until we aren't in a word,
X       make sure there is a break in the line */
X        cnt = 0;
X    while (((c = lgetc(curwp->w_dotp, curwp->w_doto)) != ' ')
X                && (c != '\t')) {
X                cnt++;
X                if (!backchar(0, 1))
X                        return(FALSE);
X        /* if we make it to the begining, start a new line */
X        if (curwp->w_doto == 0) {
X            gotoeol(FALSE, 0);
X            return(newline(0,1));
X        }
X        }
X
X    /* delete the forward white space */
X        if (!forwdel(0, 1))
X                return(FALSE);
X
X    /* put in a end of line */
X        if (!newline(0, 1))
X                return(FALSE);
X
X    /* and past the first word */
X    while (cnt-- > 0) {
X        if (forwchar(FALSE, 1) == FALSE)
X            return(FALSE);
X    }
X        return(TRUE);
X}
X
X/*
X * Move the cursor backward by "n" words. All of the details of motion are
X * performed by the "backchar" and "forwchar" routines. Error if you try to
X * move beyond the buffers.
X */
Xbackword(f, n)
X{
X        if (n < 0)
X                return (forwword(f, -n));
X        if (backchar(FALSE, 1) == FALSE)
X                return (FALSE);
X        while (n--) {
X                while (inword() == FALSE) {
X                        if (backchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                }
X                while (inword() != FALSE) {
X                        if (backchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                }
X        }
X        return (forwchar(FALSE, 1));
X}
X
X/*
X * Move the cursor forward by the specified number of words. All of the motion
X * is done by "forwchar". Error if you try and move beyond the buffer's end.
X */
Xforwword(f, n)
X{
X        if (n < 0)
X                return (backword(f, -n));
X        while (n--) {
X#if    NFWORD
X                while (inword() != FALSE) {
X                        if (forwchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                }
X#endif
X                while (inword() == FALSE) {
X                        if (forwchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                }
X#if    NFWORD == 0
X                while (inword() != FALSE) {
X                        if (forwchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                }
X#endif
X        }
X    return(TRUE);
X}
X
X/*
X * Move the cursor forward by the specified number of words. As you move,
X * convert any characters to upper case. Error if you try and move beyond the
X * end of the buffer. Bound to "M-U".
X */
Xupperword(f, n)
X{
X        register int    c;
X
X    if (curbp->b_mode&MDVIEW)    /* don't allow this command if    */
X        return(rdonly());    /* we are in read only mode    */
X        if (n < 0)
X                return (FALSE);
X        while (n--) {
X                while (inword() == FALSE) {
X                        if (forwchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                }
X                while (inword() != FALSE) {
X                        c = lgetc(curwp->w_dotp, curwp->w_doto);
X                        if (c>='a' && c<='z') {
X                                c -= 'a'-'A';
X                                lputc(curwp->w_dotp, curwp->w_doto, c);
X                                lchange(WFHARD);
X                        }
X                        if (forwchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                }
X        }
X        return (TRUE);
X}
X
X/*
X * Move the cursor forward by the specified number of words. As you move
X * convert characters to lower case. Error if you try and move over the end of
X * the buffer. Bound to "M-L".
X */
Xlowerword(f, n)
X{
X        register int    c;
X
X    if (curbp->b_mode&MDVIEW)    /* don't allow this command if    */
X        return(rdonly());    /* we are in read only mode    */
X        if (n < 0)
X                return (FALSE);
X        while (n--) {
X                while (inword() == FALSE) {
X                        if (forwchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                }
X                while (inword() != FALSE) {
X                        c = lgetc(curwp->w_dotp, curwp->w_doto);
X                        if (c>='A' && c<='Z') {
X                                c += 'a'-'A';
X                                lputc(curwp->w_dotp, curwp->w_doto, c);
X                                lchange(WFHARD);
X                        }
X                        if (forwchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                }
X        }
X        return (TRUE);
X}
X
X/*
X * Move the cursor forward by the specified number of words. As you move
X * convert the first character of the word to upper case, and subsequent
X * characters to lower case. Error if you try and move past the end of the
X * buffer. Bound to "M-C".
X */
Xcapword(f, n)
X{
X        register int    c;
X
X    if (curbp->b_mode&MDVIEW)    /* don't allow this command if    */
X        return(rdonly());    /* we are in read only mode    */
X        if (n < 0)
X                return (FALSE);
X        while (n--) {
X                while (inword() == FALSE) {
X                        if (forwchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                }
X                if (inword() != FALSE) {
X                        c = lgetc(curwp->w_dotp, curwp->w_doto);
X                        if (c>='a' && c<='z') {
X                                c -= 'a'-'A';
X                                lputc(curwp->w_dotp, curwp->w_doto, c);
X                                lchange(WFHARD);
X                        }
X                        if (forwchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                        while (inword() != FALSE) {
X                                c = lgetc(curwp->w_dotp, curwp->w_doto);
X                                if (c>='A' && c<='Z') {
X                                        c += 'a'-'A';
X                                        lputc(curwp->w_dotp, curwp->w_doto, c);
X                                        lchange(WFHARD);
X                                }
X                                if (forwchar(FALSE, 1) == FALSE)
X                                        return (FALSE);
X                        }
X                }
X        }
X        return (TRUE);
X}
X
X/*
X * Kill forward by "n" words. Remember the location of dot. Move forward by
X * the right number of words. Put dot back where it was and issue the kill
X * command for the right number of characters. Bound to "M-D".
X */
Xdelfword(f, n)
X{
X        register LINE   *dotp;
X        register int    doto;
X        long size;
X
X    if (curbp->b_mode&MDVIEW)    /* don't allow this command if    */
X        return(rdonly());    /* we are in read only mode    */
X        if (n < 0)
X                return (FALSE);
X        if ((lastflag&CFKILL) == 0)     /* Clear kill buffer if */
X                kdelete();              /* last wasn't a kill.  */
X        thisflag |= CFKILL;
X        dotp = curwp->w_dotp;
X        doto = curwp->w_doto;
X        size = 0;
X        while (n--) {
X#if    NFWORD
X        if (curwp->w_doto == llength(curwp->w_dotp)) {
X            if (forwchar(FALSE,1) == FALSE)
X                return(FALSE);
X            ++size;
X        }
X
X        while (inword() != FALSE) {
X            if (forwchar(FALSE,1) == FALSE)
X                return(FALSE);
X            ++size;
X        }
X
X                while ((inword() == FALSE) &&
X                (curwp->w_doto != llength(curwp->w_dotp))) {
X                        if (forwchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                        ++size;
X                }
X#else
X                while (inword() == FALSE) {
X                        if (forwchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                        ++size;
X                }
X
X                while (inword() != FALSE) {
X                        if (forwchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                        ++size;
X                }
X#endif
X        }
X        curwp->w_dotp = dotp;
X        curwp->w_doto = doto;
X        return (ldelete(size, TRUE));
X}
X
X/*
X * Kill backwards by "n" words. Move backwards by the desired number of words,
X * counting the characters. When dot is finally moved to its resting place,
X * fire off the kill command. Bound to "M-Rubout" and to "M-Backspace".
X */
Xdelbword(f, n)
X{
X        long size;
X
X    if (curbp->b_mode&MDVIEW)    /* don't allow this command if    */
X        return(rdonly());    /* we are in read only mode    */
X        if (n < 0)
X                return (FALSE);
X        if ((lastflag&CFKILL) == 0)     /* Clear kill buffer if */
X                kdelete();              /* last wasn't a kill.  */
X        thisflag |= CFKILL;
X        if (backchar(FALSE, 1) == FALSE)
X                return (FALSE);
X        size = 0;
X        while (n--) {
X                while (inword() == FALSE) {
X                        if (backchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                        ++size;
X                }
X                while (inword() != FALSE) {
X                        if (backchar(FALSE, 1) == FALSE)
X                                return (FALSE);
X                        ++size;
X                }
X        }
X        if (forwchar(FALSE, 1) == FALSE)
X                return (FALSE);
X        return (ldelete(size, TRUE));
X}
X
X/*
X * Return TRUE if the character at dot is a character that is considered to be
X * part of a word. The word character list is hard coded. Should be setable.
X */
Xinword()
X{
X        register int    c;
X
X        if (curwp->w_doto == llength(curwp->w_dotp))
X                return (FALSE);
X        c = lgetc(curwp->w_dotp, curwp->w_doto);
X        if (c>='a' && c<='z')
X                return (TRUE);
X        if (c>='A' && c<='Z')
X                return (TRUE);
X        if (c>='0' && c<='9')
X                return (TRUE);
X        if (c=='$' || c=='_')                   /* For identifiers      */
X                return (TRUE);
X        return (FALSE);
X}
X
X#if    WORDPRO
Xfillpara(f, n)    /* Fill the current paragraph according to the current
X           fill column                        */
X
Xint f, n;    /* deFault flag and Numeric argument */
X
X{
X    register int c;            /* current char durring scan    */
X    register int wordlen;        /* length of current word    */
X    register int clength;        /* position on line during fill    */
X    register int i;            /* index during word copy    */
X    register int newlength;        /* tentative new line length    */
X    register int eopflag;        /* Are we at the End-Of-Paragraph? */
X    register int firstflag;        /* first word? (needs no space)    */
X    register LINE *eopline;        /* pointer to line just past EOP */
X    register int dotflag;        /* was the last char a period?    */
X    char wbuf[NSTRING];        /* buffer for current word    */
X
X    if (curbp->b_mode&MDVIEW)    /* don't allow this command if    */
X        return(rdonly());    /* we are in read only mode    */
X    if (fillcol == 0) {    /* no fill column set */
X        mlwrite("No fill column set");
X        return(FALSE);
X    }
X
X    /* record the pointer to the line just past the EOP */
X    gotoeop(FALSE, 1);
X    eopline = lforw(curwp->w_dotp);
X
X    /* and back top the begining of the paragraph */
X    gotobop(FALSE, 1);
X
X    /* initialize various info */
X    clength = curwp->w_doto;
X    if (clength && curwp->w_dotp->l_text[0] == TAB)
X        clength = 8;
X    wordlen = 0;
X    dotflag = FALSE;
X
X    /* scan through lines, filling words */
X    firstflag = TRUE;
X    eopflag = FALSE;
X    while (!eopflag) {
X        /* get the next character in the paragraph */
X        if (curwp->w_doto == llength(curwp->w_dotp)) {
X            c = ' ';
X            if (lforw(curwp->w_dotp) == eopline)
X                eopflag = TRUE;
X        } else
X            c = lgetc(curwp->w_dotp, curwp->w_doto);
X
X        /* and then delete it */
X        ldelete(1L, FALSE);
X
X        /* if not a separator, just add it in */
X        if (c != ' ' && c != '    ') {
X            dotflag = (c == '.');        /* was it a dot */
X            if (wordlen < NSTRING - 1)
X                wbuf[wordlen++] = c;
X        } else if (wordlen) {
X            /* at a word break with a word waiting */
X            /* calculate tantitive new length with word added */
X            newlength = clength + 1 + wordlen;
X            if (newlength <= fillcol) {
X                /* add word to current line */
X                if (!firstflag) {
X                    linsert(1, ' '); /* the space */
X                    ++clength;
X                }
X                firstflag = FALSE;
X            } else {
X                /* start a new line */
X                lnewline();
X                clength = 0;
X            }
X
X            /* and add the word in in either case */
X            for (i=0; i<wordlen; i++) {
X                linsert(1, wbuf[i]);
X                ++clength;
X            }
X            if (dotflag) {
X                linsert(1, ' ');
X                ++clength;
X            }
X            wordlen = 0;
X        }
X    }
X    /* and add a last newline for the end of our new paragraph */
X    lnewline();
X    return(TRUE);
X}
X
Xkillpara(f, n)    /* delete n paragraphs starting with the current one */
X
Xint f;    /* default flag */
Xint n;    /* # of paras to delete */
X
X{
X    register int status;    /* returned status of functions */
X
X    while (n--) {        /* for each paragraph to delete */
X
X        /* mark out the end and begining of the para to delete */
X        gotoeop(FALSE, 1);
X
X        /* set the mark here */
X            curwp->w_markp = curwp->w_dotp;
X            curwp->w_marko = curwp->w_doto;
X
X        /* go to the begining of the paragraph */
X        gotobop(FALSE, 1);
X        curwp->w_doto = 0;    /* force us to the begining of line */
X
X        /* and delete it */
X        if ((status = killregion(FALSE, 1)) != TRUE)
X            return(status);
X
X        /* and clean up the 2 extra lines */
X        ldelete(2L, TRUE);
X    }
X    return(TRUE);
X}
X
X
X/*    wordcount:    count the # of words in the marked region,
X            along with average word sizes, # of chars, etc,
X            and report on them.            */
X
Xwordcount(f, n)
X
Xint f, n;    /* ignored numeric arguments */
X
X{
X    register LINE *lp;    /* current line to scan */
X    register int offset;    /* current char to scan */
X    long size;        /* size of region left to count */
X    register int ch;    /* current character to scan */
X    register int wordflag;    /* are we in a word now? */
X    register int lastflag;    /* were we just in a word? */
X    long nwords;        /* total # of words */
X    long nchars;        /* total number of chars */
X    int nlines;        /* total number of lines in region */
X    int avgch;        /* average number of chars/word */
X    int status;        /* status return code */
X    REGION region;        /* region to look at */
X
X    /* make sure we have a region to count */
X        if ((status = getregion(®ion)) != TRUE)
X                return(status);
X    lp = region.r_linep;
X    offset = region.r_offset;
X    size = region.r_size;
X
X    /* count up things */
X    lastflag = FALSE;
X    nchars = 0L;
X    nwords = 0L;
X    nlines = 0;
X    while (size--) {
X
X        /* get the current character */
X        if (offset == llength(lp)) {    /* end of line */
X            ch = '\n';
X            lp = lforw(lp);
X            offset = 0;
X            ++nlines;
X        } else {
X            ch = lgetc(lp, offset);
X            ++offset;
X        }
X
X        /* and tabulate it */
X        wordflag = ((ch >= 'a' && ch <= 'z') ||
X                (ch >= 'A' && ch <= 'Z') ||
X                (ch >= '0' && ch <= '9') ||
X                (ch == '$' || ch == '_'));
X        if (wordflag == TRUE && lastflag == FALSE)
X            ++nwords;
X        lastflag = wordflag;
X        ++nchars;
X    }
X
X    /* and report on the info */
X    if (nwords > 0L)
X        avgch = (int)((100L * nchars) / nwords);
X    else
X        avgch = 0;
X
X    mlwrite("Words %D Chars %D Lines %d Avg chars/word %f",
X        nwords, nchars, nlines + 1, avgch);
X    return(TRUE);
X}
X#endif
FRIDAY_NIGHT