abbrev.c

早期freebsd实现

/***************************************************************************
 * This program is Copyright (C) 1986, 1987, 1988 by Jonathan Payne.  JOVE *
 * is provided to you without charge, and with no warranty.  You may give  *
 * away copies of JOVE, including sources, provided that this notice is    *
 * included in all the files.                                              *
 ***************************************************************************/

#include "jove.h"

#ifdef	ABBREV

#include "fp.h"
#include "ctype.h"

#ifdef	MSDOS
# include <io.h>
#endif
#define HASHSIZE	20

struct abbrev {
	unsigned int	a_hash;
	char	*a_abbrev,
		*a_phrase;
	struct abbrev	*a_next;
	data_obj	*a_cmdhook;
};

private	void
	define proto((struct abbrev **, char *, char *));

#define GLOBAL	NMAJORS
private struct abbrev	*A_tables[NMAJORS + 1][HASHSIZE];	/* Must be zeroed! */

bool AutoCaseAbbrev = ON;

private unsigned int
hash(a)
register char	*a;
{
	register unsigned int	hashval = 0;
	register int	c;

	while ((c = *a++) != '\0')
		hashval = (hashval << 2) + c;

	return hashval;
}

private void
def_abbrev(table)
struct abbrev	*table[HASHSIZE];
{
	char	abbrev[100],
		phrase[100];

	null_ncpy(abbrev, ask((char *)NULL, "abbrev: "), sizeof(abbrev)-1);
	null_ncpy(phrase, ask((char *)NULL, "abbrev: %s phrase: ", abbrev),
		sizeof(phrase)-1);
	define(table, abbrev, phrase);
}

private struct abbrev *
lookup_abbrev(table, abbrev)
register struct abbrev	*table[HASHSIZE];
register char	*abbrev;
{
	register struct abbrev	*ap;
	unsigned int	h;

	h = hash(abbrev);
	for (ap = table[h % HASHSIZE]; ap; ap = ap->a_next)
		if (ap->a_hash == h && strcmp(ap->a_abbrev, abbrev) == 0)
			break;
	return ap;
}

private void
define(table, abbrev, phrase)
register struct abbrev	*table[HASHSIZE];
char	*abbrev,
	*phrase;
{
	register struct abbrev	*ap;

	ap = lookup_abbrev(table, abbrev);
	if (ap == NULL) {
		register unsigned int	h = hash(abbrev);

		ap = (struct abbrev *) emalloc(sizeof *ap);
		ap->a_hash = h;
		ap->a_abbrev = copystr(abbrev);
		h %= HASHSIZE;
		ap->a_next = table[h];
		ap->a_cmdhook = NULL;
		table[h] = ap;
	} else
		free((UnivPtr) ap->a_phrase);
	ap->a_phrase = copystr(phrase);
}

void
AbbrevExpand()
{
	Bufpos	point;
	char	wordbuf[100];
	register char	*wp = wordbuf,
			*cp;
	register int	c;

	int	UC_count = 0;
	struct abbrev	*ap;

	DOTsave(&point);
	WITH_TABLE(curbuf->b_major)
	    b_word(1);
	    while (curchar < point.p_char && ismword(c = linebuf[curchar])) {
		    if (AutoCaseAbbrev) {
			    if (jisupper(c)) {
				    UC_count += 1;
				    c = jtolower(c);
			    }
		    }
		    *wp++ = c;
		    curchar += 1;
	    }
	    *wp = '\0';
	END_TABLE();

	if ((ap = lookup_abbrev(A_tables[curbuf->b_major], wordbuf)) == NULL &&
	    (ap = lookup_abbrev(A_tables[GLOBAL], wordbuf)) == NULL) {
		SetDot(&point);
		return;
	}
	del_char(BACKWARD, (wp - wordbuf), NO);

	for (cp = ap->a_phrase; (c = *cp) != '\0'; ) {
		if (AutoCaseAbbrev) {
			insert_c(jislower(c) && UC_count &&
			       (cp == ap->a_phrase || (UC_count > 1 && (cp[-1] == ' '))) ?
				CharUpcase(c) : c, 1);
		} else
			insert_c(c, 1);
		cp += 1;
	}
	if (ap->a_cmdhook != NULL)
		ExecCmd(ap->a_cmdhook);
}

private char	*mode_names[NMAJORS + 1] = {
	"Fundamental Mode",
	"Text Mode",
	"C Mode",
#ifdef	LISP
	"Lisp Mode",
#endif
	"Global"
};

private void
save_abbrevs(file)
char	*file;
{
	File	*fp;
	struct abbrev	*ap,
			**tp;
	char	buf[LBSIZE];
	int	i,
		count = 0;

	fp = open_file(file, buf, F_WRITE, YES, YES);
	for (i = 0; i <= GLOBAL; i++) {
		fwritef(fp, "------%s abbrevs------\n", mode_names[i]);
		for (tp = A_tables[i]; tp < &A_tables[i][HASHSIZE]; tp++)
			for (ap = *tp; ap; ap = ap->a_next) {
				fwritef(fp, "%s:%s\n",
					ap->a_abbrev,
					ap->a_phrase);
				count += 1;
			}
	}
	f_close(fp);
	add_mess(" %d written.", count);
}

private void
rest_abbrevs(file)
char	*file;
{
	int	mode = -1,	/* Will be ++'d immediately */
		lnum = 0;
	char	*phrase_p;
	File	*fp;
	char	buf[LBSIZE];

	fp = open_file(file, buf, F_READ, YES, YES);
	while (mode <= GLOBAL) {
		if (f_gets(fp, genbuf, (size_t) LBSIZE) || genbuf[0] == '\0')
			break;
		lnum += 1;
		if (strncmp(genbuf, "------", (size_t)6) == 0) {
			mode += 1;
			continue;
		}
		if (mode == -1 || (phrase_p = strchr(genbuf, ':')) == NULL)
			complain("Abbrev. format error, line %d.", file, lnum);
		*phrase_p++ = '\0';	/* Null terminate the abbrev. */
		define(A_tables[mode], genbuf, phrase_p);
	}
	f_close(fp);
	message(NullStr);
}

void
DefGAbbrev()
{
	def_abbrev(A_tables[GLOBAL]);
}

void
DefMAbbrev()
{
	def_abbrev(A_tables[curbuf->b_major]);
}

void
SaveAbbrevs()
{
	char	filebuf[FILESIZE];

	save_abbrevs(ask_file((char *)NULL, (char *)NULL, filebuf));
}

void
RestAbbrevs()
{
	char	filebuf[FILESIZE];

	rest_abbrevs(ask_file((char *)NULL, (char *)NULL, filebuf));
}

void
EditAbbrevs()
{
	char	*tname = "jove_wam.$$$",
		*EditName = "Abbreviation Edit";
	Buffer	*obuf = curbuf,
		*ebuf;

	if ((ebuf = buf_exists(EditName)) != NULL) {
		if (ebuf->b_type != B_SCRATCH)
			confirm("Over-write buffer %b? ", ebuf);
	}
	SetBuf(ebuf = do_select(curwind, EditName));
	ebuf->b_type = B_SCRATCH;
	initlist(ebuf);
	/* Empty buffer.  Save the definitions to a tmp file
	   and read them into this buffer so we can edit them. */
	save_abbrevs(tname);
	read_file(tname, NO);
	message("[Edit definitions and then type C-X C-C]");
	Recur();		/* We edit them ... now */
	/* RESetBuf in case we deleted the buffer while we were editing. */
	SetBuf(ebuf = do_select(curwind, EditName));
	if (IsModified(ebuf)) {
		SetBuf(ebuf);
		file_write(tname, NO);
		rest_abbrevs(tname);
	}
	(void) unlink(tname);
	SetBuf(do_select(curwind, obuf->b_name));
}

void
BindMtoW()
{
	struct abbrev	*ap;
	char	*word;
	data_obj	*hook;

	word = ask((char *)NULL, "Word: ");

	if ((ap = lookup_abbrev(A_tables[curbuf->b_major], word)) == NULL &&
	    (ap = lookup_abbrev(A_tables[GLOBAL], word)) == NULL)
		complain("%s: unknown abbrev.", word);

	hook = findmac("Macro: ");
	if (hook == NULL)
		complain("[Undefined macro]");
	ap->a_cmdhook = hook;
}

#endif	/* ABBREV */