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/* vi: set sw=4 ts=4: */

/* getdelim for uClibc

 *

 * Copyright (C) 2000 by Lineo, inc. and Erik Andersen

 * Copyright (C) 2000,2001 by Erik Andersen <andersen@uclibc.org>

 * Written by Erik Andersen <andersen@uclibc.org>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU Library General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or (at your

 * option) any later version.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License

 * for more details.

 *

 * You should have received a copy of the GNU Library General Public License

 * along with this program; if not, write to the Free Software Foundation,

 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

 *

 */

#include <stddef.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <limits.h>

#include <errno.h>

/* Read up to (and including) a TERMINATOR from STREAM into *LINEPTR

   (and null-terminate it). *LINEPTR is a pointer returned from malloc (or

   NULL), pointing to *N characters of space.  It is realloc'd as

   necessary.  Returns the number of characters read (not including the

   null delimiter), or -1 on error or EOF.  */

ssize_t getdelim(char **linebuf, size_t *linebufsz, int delimiter, FILE *file)

{

        static const int GROWBY = 80; /* how large we will grow strings by */

        int ch;

        int idx = 0;

        if (file == NULL || linebuf==NULL || linebufsz == NULL) {

            __set_errno(EINVAL);

            return -1;

        }

        if (*linebuf == NULL || *linebufsz < 2) {

                *linebuf = malloc(GROWBY);

                if (!*linebuf) {

                        __set_errno(ENOMEM);

                        return -1;

                }

                *linebufsz += GROWBY;

        }

        while (1) {

                ch = fgetc(file);

                if (ch == EOF)

                        break;

                /* grow the line buffer as necessary */

                while (idx > *linebufsz-2) {

                        *linebuf = realloc(*linebuf, *linebufsz += GROWBY);

                        if (!*linebuf) {

                                __set_errno(ENOMEM);

                                return -1;

                        }

                }

                (*linebuf)[idx++] = (char)ch;

                if ((char)ch == delimiter)

                        break;

        }

        if (idx != 0)

            (*linebuf)[idx] = 0;

        else if ( ch == EOF )

                return -1;

        return idx;

}