altsvc: Fix building with cookies disables

ALTSVC requires Curl_get_line which is defined in lib/cookie.c inside a #if
check of HTTP and COOKIES. That makes Curl_get_line undefined if COOKIES is
disabled. Fix by splitting out the function into a separate file which can
be included where needed.

Closes #3717
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Marcel Raad <Marcel.Raad@teamviewer.com>

lib/Makefile.inc

@@ -55,7 +55,7 @@ LIB_CFILES = file.c timeval.c base64.c hostip.c progress.c formdata.c   \
   curl_multibyte.c hostcheck.c conncache.c dotdot.c                     \
   x509asn1.c http2.c smb.c curl_endian.c curl_des.c system_win32.c      \
   mime.c sha256.c setopt.c curl_path.c curl_ctype.c curl_range.c psl.c  \
-  doh.c urlapi.c altsvc.c
+  doh.c urlapi.c curl_get_line.c altsvc.c
 
 LIB_HFILES = arpa_telnet.h netrc.h file.h timeval.h hostip.h progress.h \
   formdata.h cookie.h http.h sendf.h ftp.h url.h dict.h if2ip.h         \
@@ -76,7 +76,7 @@ LIB_HFILES = arpa_telnet.h netrc.h file.h timeval.h hostip.h progress.h \
   x509asn1.h http2.h sigpipe.h smb.h curl_endian.h curl_des.h           \
   curl_printf.h system_win32.h rand.h mime.h curl_sha256.h setopt.h     \
   curl_path.h curl_ctype.h curl_range.h psl.h doh.h urlapi-int.h        \
-  altsvc.h
+  curl_get_line.h altsvc.h
 
 LIB_RCFILES = libcurl.rc
 

lib/altsvc.c

@@ -29,7 +29,7 @@
 #include <curl/curl.h>
 #include "urldata.h"
 #include "altsvc.h"
-#include "cookie.h" /* for Curl_get_line() */
+#include "curl_get_line.h"
 #include "strcase.h"
 #include "parsedate.h"
 #include "sendf.h"

lib/cookie.c

@@ -93,6 +93,7 @@ Example set of cookies:
 #include "share.h"
 #include "strtoofft.h"
 #include "strcase.h"
+#include "curl_get_line.h"
 #include "curl_memrchr.h"
 #include "inet_pton.h"
 
@@ -1085,33 +1086,6 @@ Curl_cookie_add(struct Curl_easy *data,
   return co;
 }
 
-/*
- * get_line() makes sure to only return complete whole lines that fit in 'len'
- * bytes and end with a newline.
- */
-char *Curl_get_line(char *buf, int len, FILE *input)
-{
-  bool partial = FALSE;
-  while(1) {
-    char *b = fgets(buf, len, input);
-    if(b) {
-      size_t rlen = strlen(b);
-      if(rlen && (b[rlen-1] == '\n')) {
-        if(partial) {
-          partial = FALSE;
-          continue;
-        }
-        return b;
-      }
-      /* read a partial, discard the next piece that ends with newline */
-      partial = TRUE;
-    }
-    else
-      break;
-  }
-  return NULL;
-}
-
 
 /*****************************************************************************
  *

lib/cookie.h

@@ -101,7 +101,6 @@ struct Cookie *Curl_cookie_getlist(struct CookieInfo *, const char *,
 void Curl_cookie_freelist(struct Cookie *cookies);
 void Curl_cookie_clearall(struct CookieInfo *cookies);
 void Curl_cookie_clearsess(struct CookieInfo *cookies);
-char *Curl_get_line(char *buf, int len, FILE *input);
 
 #if defined(CURL_DISABLE_HTTP) || defined(CURL_DISABLE_COOKIES)
 #define Curl_cookie_list(x) NULL

lib/curl_get_line.c

@@ -0,0 +1,55 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#include "curl_get_line.h"
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "memdebug.h"
+
+/*
+ * get_line() makes sure to only return complete whole lines that fit in 'len'
+ * bytes and end with a newline.
+ */
+char *Curl_get_line(char *buf, int len, FILE *input)
+{
+  bool partial = FALSE;
+  while(1) {
+    char *b = fgets(buf, len, input);
+    if(b) {
+      size_t rlen = strlen(b);
+      if(rlen && (b[rlen-1] == '\n')) {
+        if(partial) {
+          partial = FALSE;
+          continue;
+        }
+        return b;
+      }
+      /* read a partial, discard the next piece that ends with newline */
+      partial = TRUE;
+    }
+    else
+      break;
+  }
+  return NULL;
+}

lib/curl_get_line.h

@@ -0,0 +1,29 @@
+#ifndef HEADER_CURL_GET_LINE_H
+#define HEADER_CURL_GET_LINE_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+/* get_line() makes sure to only return complete whole lines that fit in 'len'
+ * bytes and end with a newline. */
+char *Curl_get_line(char *buf, int len, FILE *input);
+
+#endif /* HEADER_CURL_GET_LINE_H */