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