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Marlin-Artillery-M600/buildroot/share/fonts/getline.c

126 lines
3 KiB
C

/**
* getline.c --- Based on...
*
* 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
#if !HAVE_GETLINE
//#include "getdelim.h"
#include <stdio.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';
result = cur_len ? (int) cur_len : (int) result;
unlock_return:
funlockfile(fp);
return result;
}
#endif