| 0,0 → 1,116 |
|---|
| /* getdelim.c --- Implementation of replacement getdelim function. |
| Copyright (C) 1994, 1996, 1997, 1998, 2001, 2003, 2005 Free |
| Software Foundation, Inc. |
| |
| 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, 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., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301, USA. */ |
| |
| /* Ported from glibc by Simon Josefsson. */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include "getdelim.h" |
| |
| #include <limits.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| |
| #ifndef SIZE_MAX |
| # define SIZE_MAX ((size_t) -1) |
| #endif |
| #ifndef SSIZE_MAX |
| # define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2)) |
| #endif |
| #if !HAVE_FLOCKFILE |
| # undef flockfile |
| # define flockfile(x) ((void) 0) |
| #endif |
| #if !HAVE_FUNLOCKFILE |
| # undef funlockfile |
| # define funlockfile(x) ((void) 0) |
| #endif |
| |
| /* Read up to (and including) a DELIMITER from FP into *LINEPTR (and |
| NUL-terminate it). *LINEPTR is a pointer returned from malloc (or |
| NULL), pointing to *N characters of space. It is realloc'ed as |
| necessary. Returns the number of characters read (not including |
| the null terminator), or -1 on error or EOF. */ |
| ssize_t getdelim(char **lineptr, size_t *n, int delimiter, FILE *fp) { |
| ssize_t result; |
| size_t cur_len = 0; |
| |
| if ((lineptr == NULL) || (n == NULL) || (fp == NULL)) { |
| errno = EINVAL; |
| return(-1); |
| } |
| |
| flockfile (fp); |
| |
| if ((*lineptr == NULL) || (*n == 0)) { |
| *n = 120; |
| *lineptr = (char *)malloc(*n); |
| if (*lineptr == NULL) { |
| result = -1; |
| goto unlock_return; |
| } |
| } |
| |
| for (;;) { |
| int i; |
| |
| i = getc(fp); |
| if (i == EOF) { |
| result = -1; |
| break; |
| } |
| |
| /* Make enough space for len+1 (for final NUL) bytes. */ |
| if (cur_len + 1 >= *n) { |
| size_t needed_max = SSIZE_MAX < SIZE_MAX ? (size_t) SSIZE_MAX + 1 : SIZE_MAX; |
| size_t needed = 2 * *n + 1; /* Be generous. */ |
| char *new_lineptr; |
| |
| if (needed_max < needed) needed = needed_max; |
| if (cur_len + 1 >= needed) { |
| result = -1; |
| goto unlock_return; |
| } |
| |
| new_lineptr = (char *) realloc (*lineptr, needed); |
| if (new_lineptr == NULL) { |
| result = -1; |
| goto unlock_return; |
| } |
| |
| *lineptr = new_lineptr; |
| *n = needed; |
| } |
| |
| (*lineptr)[cur_len] = i; |
| cur_len++; |
| |
| if (i == delimiter) break; |
| } |
| (*lineptr)[cur_len] = '\0'; |
| |
| if (cur_len != 0) result = cur_len; |
| /* result = cur_len ? cur_len : result; */ /* this one have been replaced by the line above for reading simplicity */ |
| |
| unlock_return: |
| funlockfile(fp); |
| return(result); |
| } |