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126 lines
3.0 KiB
126 lines
3.0 KiB
/** |
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* getline.c --- Based on... |
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* |
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* getdelim.c --- Implementation of replacement getdelim function. |
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* Copyright (C) 1994, 1996, 1997, 1998, 2001, 2003, 2005 Free |
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* Software Foundation, Inc. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2, or (at |
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* 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, but |
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* 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., 51 Franklin Street, Fifth Floor, Boston, MA |
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* 02110-1301, USA. |
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*/ |
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/* Ported from glibc by Simon Josefsson. */ |
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#ifdef HAVE_CONFIG_H |
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#include <config.h> |
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#endif |
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#if !HAVE_GETLINE |
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//#include "getdelim.h" |
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#include <stdio.h> |
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#include <limits.h> |
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#include <stdlib.h> |
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#include <errno.h> |
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#ifndef SIZE_MAX |
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#define SIZE_MAX ((size_t) -1) |
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#endif |
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#ifndef SSIZE_MAX |
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#define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2)) |
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#endif |
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#if !HAVE_FLOCKFILE |
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#undef flockfile |
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#define flockfile(x) ((void)0) |
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#endif |
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#if !HAVE_FUNLOCKFILE |
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#undef funlockfile |
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#define funlockfile(x) ((void)0) |
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#endif |
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/* Read up to (and including) a DELIMITER from FP into *LINEPTR (and |
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NUL-terminate it). *LINEPTR is a pointer returned from malloc (or |
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NULL), pointing to *N characters of space. It is realloc'ed as |
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necessary. Returns the number of characters read (not including |
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the null terminator), or -1 on error or EOF. */ |
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ssize_t |
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getdelim (char **lineptr, size_t *n, int delimiter, FILE *fp) { |
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ssize_t result; |
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size_t cur_len = 0; |
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if (lineptr == NULL || n == NULL || fp == NULL) { |
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errno = EINVAL; |
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return -1; |
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} |
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flockfile (fp); |
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if (*lineptr == NULL || *n == 0) { |
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*n = 120; |
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*lineptr = (char *) malloc(*n); |
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if (*lineptr == NULL) { |
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result = -1; |
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goto unlock_return; |
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} |
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} |
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for (;;) { |
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int i; |
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i = getc(fp); |
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if (i == EOF) { |
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result = -1; |
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break; |
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} |
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/* Make enough space for len+1 (for final NUL) bytes. */ |
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if (cur_len + 1 >= *n) { |
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size_t needed_max = |
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SSIZE_MAX < SIZE_MAX ? (size_t) SSIZE_MAX + 1 : SIZE_MAX; |
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size_t needed = 2 * *n + 1; /* Be generous. */ |
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char *new_lineptr; |
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if (needed_max < needed) |
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needed = needed_max; |
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if (cur_len + 1 >= needed) { |
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result = -1; |
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goto unlock_return; |
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} |
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new_lineptr = (char *) realloc (*lineptr, needed); |
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if (new_lineptr == NULL) { |
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result = -1; |
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goto unlock_return; |
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} |
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*lineptr = new_lineptr; |
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*n = needed; |
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} |
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(*lineptr)[cur_len] = i; |
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cur_len++; |
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if (i == delimiter) break; |
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} |
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(*lineptr)[cur_len] = '\0'; |
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result = cur_len ? (int) cur_len : (int) result; |
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unlock_return: |
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funlockfile(fp); |
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return result; |
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} |
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#endif
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