/* 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; }