tools/include/getline.h

   1 /*-
   2  * Copyright (c) 2006 SPARTA, Inc.
   3  * All rights reserved.
   4  *
   5  * This software was developed by SPARTA ISSO under SPAWAR contract
   6  * N66001-04-C-6019 ("SEFOS").
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #ifndef __linux__
  31 #include <sys/types.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35
  36 /*
  37  * Emulate glibc getline() via BSD fgetln().
  38  * Note that outsize is not changed unless memory is allocated.
  39  */
  40 static inline ssize_t
  41 getline(char **outbuf, size_t *outsize, FILE *fp)
  42 {
  43         size_t len;
  44
  45 #ifndef __CYGWIN__
  46         char *buf;
  47         buf = fgetln(fp, &len);
  48 #else
  49         char buf[512];
  50         fgets(buf, sizeof(buf), fp);
  51         len = strlen(buf);
  52 #endif
  53         if (buf == NULL)
  54                 return (-1);
  55
  56         /* Assumes realloc() accepts NULL for ptr (C99) */
  57         if (*outbuf == NULL || *outsize < len + 1) {
  58                 void *tmp = realloc(*outbuf, len + 1);
  59                 if (tmp == NULL)
  60                         return (-1);
  61                 *outbuf = tmp;
  62                 *outsize = len + 1;
  63         }
  64         memcpy(*outbuf, buf, len);
  65         (*outbuf)[len] = '\0';
  66         return (len);
  67 }
  68 #endif