83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) many different people.
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* If you wrote this, please acknowledge your work.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; 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>
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#include "libbb.h"
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/* get_line_from_file() - This function reads an entire line from a text file,
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* up to a newline. It returns a malloc'ed char * which must be stored and
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* free'ed by the caller. If 'c' is nonzero, the trailing '\n' (if any)
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* is removed. In event of a read error or EOF, NULL is returned. */
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static char *private_get_line_from_file(FILE *file, int c)
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{
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#define GROWBY (80) /* how large we will grow strings by */
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int ch;
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int idx = 0;
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char *linebuf = NULL;
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int linebufsz = 0;
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while ((ch = getc(file)) != EOF) {
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/* grow the line buffer as necessary */
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if (idx > linebufsz - 2) {
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linebuf = xrealloc(linebuf, linebufsz += GROWBY);
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}
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linebuf[idx++] = (char)ch;
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if (ch == '\n' || ch == '\0') {
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if (c) {
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--idx;
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}
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break;
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}
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}
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if (linebuf) {
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if (ferror(file)) {
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free(linebuf);
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return NULL;
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}
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linebuf[idx] = 0;
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}
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return linebuf;
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}
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extern char *bb_get_line_from_file(FILE *file)
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{
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return private_get_line_from_file(file, 0);
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}
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extern char *bb_get_chomped_line_from_file(FILE *file)
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{
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return private_get_line_from_file(file, 1);
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}
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/* END CODE */
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/*
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Local Variables:
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c-file-style: "linux"
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c-basic-offset: 4
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tab-width: 4
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End:
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*/
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