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1.8.7

    1: /*
    2:  * Copyright (c) 2009-2010, 2012-2013 Todd C. Miller <Todd.Miller@courtesan.com>
    3:  *
    4:  * Permission to use, copy, modify, and distribute this software for any
    5:  * purpose with or without fee is hereby granted, provided that the above
    6:  * copyright notice and this permission notice appear in all copies.
    7:  *
    8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   12:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   13:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   14:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   15:  */
   16: 
   17: #include <config.h>
   18: 
   19: #ifndef HAVE_GETLINE
   20: 
   21: #include <sys/types.h>
   22: 
   23: #include <stdio.h>
   24: #ifdef STDC_HEADERS
   25: # include <stdlib.h>
   26: # include <stddef.h>
   27: #else
   28: # ifdef HAVE_STDLIB_H
   29: #  include <stdlib.h>
   30: # endif
   31: #endif /* STDC_HEADERS */
   32: #ifdef HAVE_STRING_H
   33: # include <string.h>
   34: #endif /* HAVE_STRING_H */
   35: #ifdef HAVE_STRINGS_H
   36: # include <strings.h>
   37: #endif /* HAVE_STRINGS_H */
   38: #include <limits.h>
   39: 
   40: #include "missing.h"
   41: 
   42: #ifndef LINE_MAX
   43: # define LINE_MAX 2048
   44: #endif
   45: 
   46: #ifdef HAVE_FGETLN
   47: ssize_t
   48: getline(char **bufp, size_t *bufsizep, FILE *fp)
   49: {
   50:     char *buf, *cp;
   51:     size_t bufsize;
   52:     size_t len;
   53: 
   54:     buf = fgetln(fp, &len);
   55:     if (buf) {
   56: 	bufsize = *bufp ? *bufsizep : 0;
   57: 	if (bufsize == 0 || bufsize - 1 < len) {
   58: 	    bufsize = len + 1;
   59: 	    cp = *bufp ? realloc(*bufp, bufsize) : malloc(bufsize);
   60: 	    if (cp == NULL)
   61: 		return -1;
   62: 	    *bufp = cp;
   63: 	    *bufsizep = bufsize;
   64: 	}
   65: 	memcpy(*bufp, buf, len);
   66: 	(*bufp)[len] = '\0';
   67:     }
   68:     return buf ? len : -1;
   69: }
   70: #else
   71: ssize_t
   72: getline(char **bufp, size_t *bufsizep, FILE *fp)
   73: {
   74:     char *buf, *cp;
   75:     size_t bufsize;
   76:     ssize_t len = 0;
   77: 
   78:     buf = *bufp;
   79:     bufsize = *bufsizep;
   80:     if (buf == NULL || bufsize == 0) {
   81: 	bufsize = LINE_MAX;
   82: 	cp = buf ? realloc(buf, bufsize) : malloc(bufsize);
   83: 	if (cp == NULL)
   84: 	    return -1;
   85: 	buf = cp;
   86:     }
   87: 
   88:     for (;;) {
   89: 	if (fgets(buf + len, bufsize - len, fp) == NULL) {
   90: 	    len = -1;
   91: 	    break;
   92: 	}
   93: 	len = strlen(buf);
   94: 	if (!len || buf[len - 1] == '\n' || feof(fp))
   95: 	    break;
   96: 	bufsize *= 2;
   97: 	cp = realloc(buf, bufsize);
   98: 	if (cp == NULL)
   99: 	    return -1;
  100: 	buf = cp;
  101:     }
  102:     *bufp = buf;
  103:     *bufsizep = bufsize;
  104:     return len;
  105: }
  106: #endif /* HAVE_FGETLN */
  107: #endif /* HAVE_GETLINE */