AVRO-2955: Build avromod and avropipe for Windows.

Import getopt_long() from FreeBSD.

lang/c/src/CMakeLists.txt

@@ -138,13 +138,18 @@ add_executable(avroappend avroappend.c)
 target_link_libraries(avroappend avro-static)
 install(TARGETS avroappend RUNTIME DESTINATION bin)
 
-if (NOT WIN32)
-#TODO: Port getopt() to Windows to compile avropipe.c and avromod.c
+if(MSVC)
+add_executable(avropipe avropipe.c getopt/getopt_long.c)
+else(MSVC)
 add_executable(avropipe avropipe.c)
+endif(MSVC)
 target_link_libraries(avropipe avro-static)
 install(TARGETS avropipe RUNTIME DESTINATION bin)
 
+if(MSVC)
+add_executable(avromod avromod.c getopt/getopt_long.c)
+else(MSVC)
 add_executable(avromod avromod.c)
+endif(MSVC)
 target_link_libraries(avromod avro-static)
 install(TARGETS avromod RUNTIME DESTINATION bin)
-endif(NOT WIN32)

lang/c/src/avromod.c

@@ -16,11 +16,15 @@
  */
 
 #include <errno.h>
-#include <getopt.h>
 #include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#ifdef _WIN32
+#include "getopt/getopt.h"
+#else
+#include <getopt.h>
+#endif
 
 #include "avro.h"
 #include "avro_private.h"
@@ -130,6 +134,15 @@ int main(int argc, char **argv)
 	char  *in_filename;
 	char  *out_filename;
 
+#ifdef _MSC_VER
+	{
+		const char *cp = argv[0] + strlen(argv[0]);
+		while (cp > argv[0] && *(cp-1) != '/' && *(cp-1) != '\\' && *(cp-1) != ':')
+			--cp;
+		opt_progname = cp;
+	}
+#endif
+
 	int  ch;
 	while ((ch = getopt_long(argc, argv, "b:c:", longopts, NULL)) != -1) {
 		switch (ch) {
@@ -157,7 +170,8 @@ int main(int argc, char **argv)
 		in_filename = NULL;
 		out_filename = argv[0];
 	} else {
-		fprintf(stderr, "Can't read from multiple input files.\n");
+		if (argc > 2)
+			fprintf(stderr, "Can't read from multiple input files.\n");
 		usage();
 		exit(1);
 	}

lang/c/src/avropipe.c

@@ -17,12 +17,15 @@
 
 #include <ctype.h>
 #include <errno.h>
-#include <getopt.h>
-#include <avro/platform.h>
 #include <avro/platform.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#ifdef _WIN32
+#include "getopt/getopt.h"
+#else
+#include <getopt.h>
+#endif
 
 #include "avro.h"
 #include "avro_private.h"
@@ -400,6 +403,15 @@ int main(int argc, char **argv)
 {
 	char  *data_filename;
 
+#ifdef _MSC_VER
+	{
+		const char *cp = argv[0] + strlen(argv[0]);
+		while (cp > argv[0] && *(cp-1) != '/' && *(cp-1) != '\\' && *(cp-1) != ':')
+			--cp;
+		opt_progname = cp;
+	}
+#endif
+
 	int  ch;
 	while ((ch = getopt_long(argc, argv, "s:", longopts, NULL) ) != -1) {
 		switch (ch) {

lang/c/src/getopt/getopt.h

@@ -0,0 +1,93 @@
+/*	$NetBSD: getopt.h,v 1.4 2000/07/07 10:43:54 ad Exp $	*/
+/*	$FreeBSD: release/12.2.0/include/getopt.h 326192 2017-11-25 17:09:43Z pfg $ */
+
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-NetBSD
+ *
+ * Copyright (c) 2000 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Dieter Baron and Thomas Klausner.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _GETOPT_H_
+#define _GETOPT_H_
+
+#ifdef __CYGWIN__
+#error Not for cygwin.
+#endif
+
+#ifdef unix
+#include <sys/cdefs.h>
+#endif
+
+/*
+ * GNU-like getopt_long()/getopt_long_only() with 4.4BSD optreset extension.
+ * getopt() is declared here too for GNU programs.
+ */
+#define no_argument        0
+#define required_argument  1
+#define optional_argument  2
+
+struct option {
+	/* name of long option */
+	const char *name;
+	/*
+	 * one of no_argument, required_argument, and optional_argument:
+	 * whether option takes an argument
+	 */
+	int has_arg;
+	/* if not NULL, set *flag to val when option found */
+	int *flag;
+	/* if flag not NULL, value to set *flag to; else return value */
+	int val;
+};
+
+#ifdef __FreeBSD__
+__BEGIN_DECLS
+#endif
+int	getopt_long(int, char * const *, const char *,
+	const struct option *, int *);
+int	getopt_long_only(int, char * const *, const char *,
+	const struct option *, int *);
+#ifndef _GETOPT_DECLARED
+#define	_GETOPT_DECLARED
+int	 getopt(int, char * const [], const char *);
+
+extern char *optarg;			/* getopt(3) external variables */
+extern int optind, opterr, optopt;
+#endif
+#ifndef _OPTRESET_DECLARED
+#define	_OPTRESET_DECLARED
+extern int optreset;			/* getopt(3) external variable */
+#endif
+#ifdef _MSC_VER
+extern const char *opt_progname;
+#endif
+#ifdef __FreeBSD__
+__END_DECLS
+#endif
+
+#endif /* !_GETOPT_H_ */