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curl/ares/ares__read_line.c
Daniel Stenberg c85bf83e88 - Fixed a few variable return types for some system calls. Made configure
check for ssize_t to make it possible to use that when receiving the send()
  error code. This is necessary to prevent compiler warnings on some systems.

- Made configure create config.h, and all source files now include setup.h that
  might include the proper config.h (or a handicrafted alternative).

- Switched to 'ares_socket_t' type for sockets in ares, since Windows don't
  use 'int' for that.

- automake-ified and libool-ified c-ares. Now it builds libcares as a shared
  lib on most platforms if wanted. (This bloated the size of the release
  archive with another 200K!)

- Makefile.am now uses Makefile.inc for the c sources, h headers and man
  pages, to make it easier for other makefiles to use the exact same set of
  files.

- Adjusted 'maketgz' to use the new automake magic when building distribution
  archives.
2004-07-22 22:18:45 +00:00

65 lines
1.9 KiB
C

/* Copyright 1998 by the Massachusetts Institute of Technology.
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting
* documentation, and that the name of M.I.T. not be used in
* advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is"
* without express or implied warranty.
*/
#include "setup.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "ares.h"
#include "ares_private.h"
/* This is an internal function. Its contract is to read a line from
* a file into a dynamically allocated buffer, zeroing the trailing
* newline if there is one. The calling routine may call
* ares__read_line multiple times with the same buf and bufsize
* pointers; *buf will be reallocated and *bufsize adjusted as
* appropriate. The initial value of *buf should be NULL. After the
* calling routine is done reading lines, it should free *buf.
*/
int ares__read_line(FILE *fp, char **buf, int *bufsize)
{
char *newbuf;
size_t offset = 0;
size_t len;
if (*buf == NULL)
{
*buf = malloc(128);
if (!*buf)
return ARES_ENOMEM;
*bufsize = 128;
}
while (1)
{
if (!fgets(*buf + offset, *bufsize - (int)offset, fp))
return (offset != 0) ? 0 : (ferror(fp)) ? ARES_EFILE : ARES_EOF;
len = offset + strlen(*buf + offset);
if ((*buf)[len - 1] == '\n')
{
(*buf)[len - 1] = 0;
return ARES_SUCCESS;
}
offset = len;
/* Allocate more space. */
newbuf = realloc(*buf, *bufsize * 2);
if (!newbuf)
return ARES_ENOMEM;
*buf = newbuf;
*bufsize *= 2;
}
}