Full native win32 support

This will now compile with MSVC using the make.bat batch file. It does
however bring in some additional third party dependencies: ports of
dirent and getopt (something I'd ideally like to work on in the future).

Signed-off-by: Rory Bradford <roryrjb@gmail.com>

1 files changed, 127 insertions, 0 deletions

diff --git a/dirent/examples/cat.c b/dirent/examples/cat.c
new file mode 100644
index 0000000..5346922
--- /dev/null
+++ b/dirent/examples/cat.c
@@ -0,0 +1,127 @@
+/*
+ * Output contents of a file.
+ *
+ * Compile this file with Visual Studio and run the produced command in
+ * console with a file name argument.  For example, command
+ *
+ *     cat include\dirent.h
+ *
+ * will output the dirent.h to screen.
+ *
+ * Copyright (C) 1998-2019 Toni Ronkko
+ * This file is part of dirent.  Dirent may be freely distributed
+ * under the MIT license.  For all details and documentation, see
+ * https://github.com/tronkko/dirent
+ */
+#define _CRT_SECURE_NO_WARNINGS
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dirent.h>
+#include <errno.h>
+#include <locale.h>
+
+static void output_file(const char *fn);
+static int _main(int argc, char *argv[]);
+
+static int
+_main(int argc, char *argv[])
+{
+	/* Require at least one file */
+	if (argc == 1) {
+		fprintf(stderr, "Usage: cat filename\n");
+		return EXIT_FAILURE;
+	}
+
+	/* For each file name argument in command line */
+	int i = 1;
+	while (i < argc) {
+		output_file(argv[i]);
+		i++;
+	}
+	return EXIT_SUCCESS;
+}
+
+/*
+ * Output file to screen
+ */
+static void
+output_file(const char *fn)
+{
+	/* Open file */
+	FILE *fp = fopen(fn, "r");
+	if (!fp) {
+		/* Could not open directory */
+		fprintf(stderr, "Cannot open %s (%s)\n", fn, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+
+	/* Output file to screen */
+	size_t n;
+	do {
+		/* Read some bytes from file */
+		char buffer[4096];
+		n = fread(buffer, 1, 4096, fp);
+
+		/* Output bytes to screen */
+		fwrite(buffer, 1, n, stdout);
+	} while (n != 0);
+
+	/* Close file */
+	fclose(fp);
+}
+
+/* Stub for converting arguments to UTF-8 on Windows */
+#ifdef _MSC_VER
+int
+wmain(int argc, wchar_t *argv[])
+{
+	/* Select UTF-8 locale */
+	setlocale(LC_ALL, ".utf8");
+	SetConsoleCP(CP_UTF8);
+	SetConsoleOutputCP(CP_UTF8);
+
+	/* Allocate memory for multi-byte argv table */
+	char **mbargv;
+	mbargv = (char**) malloc(argc * sizeof(char*));
+	if (!mbargv) {
+		puts("Out of memory");
+		exit(3);
+	}
+
+	/* Convert each argument in argv to UTF-8 */
+	for (int i = 0; i < argc; i++) {
+		size_t n;
+		wcstombs_s(&n, NULL, 0, argv[i], 0);
+
+		/* Allocate room for ith argument */
+		mbargv[i] = (char*) malloc(n + 1);
+		if (!mbargv[i]) {
+			puts("Out of memory");
+			exit(3);
+		}
+
+		/* Convert ith argument to utf-8 */
+		wcstombs_s(NULL, mbargv[i], n + 1, argv[i], n);
+	}
+
+	/* Pass UTF-8 converted arguments to the main program */
+	int errorcode = _main(argc, mbargv);
+
+	/* Release UTF-8 arguments */
+	for (int i = 0; i < argc; i++) {
+		free(mbargv[i]);
+	}
+
+	/* Release the argument table */
+	free(mbargv);
+	return errorcode;
+}
+#else
+int
+main(int argc, char *argv[])
+{
+	return _main(argc, argv);
+}
+#endif
+