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/* get_line - this function will read a string from the file. The
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string may be broken across several lines using a "continue_ch" as
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the final character on a line. */
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/* THIS FUNCTION WILL malloc() MEMORY FOR THE STRING. THE CALLING
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FUNCTION MUST free() THE STRING!! */
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/* Copyright (C) 2000 Jim Hall <jhall1@isd.net> */
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/*
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include <stdlib.h> /* malloc */
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char *
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get_line (FILE *pfile, int continue_ch)
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{
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char *str; /* string that we will return */
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char *tmp_str;
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int str_len; /* current length of the string */
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int str_size; /* malloc size of the string */
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int ch;
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int last_ch;
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/* this function will malloc memory for the string. the calling
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function must free() the string. */
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str_len = 0;
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str_size = 10;
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str = malloc (sizeof (char) * str_size);
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if (!str)
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{
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/* failed! */
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return (str);
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}
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/* now, read the string */
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last_ch = '\0';
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while ((ch = fgetc (pfile)) != EOF)
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{
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/* do we have enough room in the str for this ch? */
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if (str_len >= str_size)
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{
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/* reallocate memory */
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str_size *= 2;
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tmp_str = realloc (str, sizeof (char) * str_size);
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if (tmp_str)
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{
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/* move the pointer */
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str = tmp_str;
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}
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else
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{
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/* failure! return what we have */
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return (str);
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}
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}
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/* add the ch to the str */
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if (ch == '\n')
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{
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/* is the string terminated? */
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if (last_ch == continue_ch)
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{
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/* string is continued on next line ... ignore this ch
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and erase last_ch in the string */
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str_len--;
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}
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else
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{
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/* string is terminated. return it. */
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str[str_len++] = '\0';
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return (str);
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}
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}
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else
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{
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str[str_len++] = ch;
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last_ch = ch;
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}
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} /* while */
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/* we hit eof without eol. return what we have. */
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return (NULL);
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}
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