ypcmd/mknetid/getname.c

	getname.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (C) 1986,1987,1988,1989,1990 Sun Microsystems, Inc.
 * All rights reserved.
 */


#ident  "%Z%%M% %I% %E% SMI"    /* SMI4.1 1.3 */

#include <stdio.h>
#include <string.h>

#define iseol(c)    (c == 0 || c == '\n' || strchr(com, c) != NULL)
#define issep(c)    (strchr(sep, c) != NULL)
#define isignore(c) (strchr(ignore, c) != NULL)

/*
 * getline()
 * Read a line from a file.
 * What's returned is a cookie to be passed to getname
 */
char **
getline(line, maxlinelen, f, lcount, com)
    char *line;
    int maxlinelen;
    FILE *f;
    int *lcount;
    char *com;
{
    char *p;
    static char *lp;
    do {
        if (! fgets(line, maxlinelen, f)) {
            return (NULL);
        }
        (*lcount)++;
    } while (iseol(line[0]));
    p = line;
    for (;;) {
        while (*p) {
            p++;
        }
        if (*--p == '\n' && *--p == '\\') {
            if (! fgets(p, maxlinelen, f)) {
                break;
            }
            (*lcount)++;
        } else {
            break;
        }
    }
    lp = line;
    return (&lp);
}


/*
 * getname()
 * Get the next entry from the line.
 * You tell getname() which characters to ignore before storing them
 * into name, and which characters separate entries in a line.
 * The cookie is updated appropriately.
 * return:
 *    1: one entry parsed
 *    0: partial entry parsed, ran out of space in name
 *  -1: no more entries in line
 */
getname(name, namelen, ignore, sep, linep, com)
    char *name;
    int namelen;
    char *ignore;
    char *sep;
    char **linep;
    char *com;
{
    register char c;
    register char *lp;
    register char *np;

    lp = *linep;
    do {
        c = *lp++;
    } while (isignore(c) && !iseol(c));
    if (iseol(c)) {
        *linep = lp - 1;
        return (-1);
    }
    np = name;
    while (! issep(c) && ! iseol(c) && np - name < namelen) {
        *np++ = c;
        c = *lp++;
    }
    lp--;
    if (np - name < namelen) {
        *np = 0;
        if (iseol(c)) {
            *lp = 0;
        } else {
            lp++;   /* advance over separator */
        }
    } else {
        *linep = lp;
        return (0);
    }
    *linep = lp;
    return (1);
}