Geml it self (just arguments parsing and some utils)

1 files changed, 98 insertions, 0 deletions

diff --git a/src/args_parser.c b/src/args_parser.c
new file mode 100644
index 0000000..be55e43
--- /dev/null
+++ b/src/args_parser.c
@@ -0,0 +1,98 @@
+/* geml - General extendable macro language
+ *   args_parser.c Program arguments parser
+ *
+ * Copyright (C) 2016 Karel Kočí
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <getopt.h>
+#include "args_parser.h"
+#include "utils.h"
+#include "io.h"
+
+const char *help_text = 
+	"Usage: geml [OPTIONS]... INPUT_FILE\n"
+	"  General extendable macro language processing tool.\n"
+	"\n"
+	"Options:\n"
+	"  -v, --verbose\n"
+	"    Increases vebosity of output.\n"
+	"  -q, --quiet\n"
+	"    Dcreases verbosity of output.\n"
+	"  -o, --output OUTPUT_FILE\n"
+	"    Sets file in which output is going to be stored\n"
+	"  -h, --help\n"
+	"    Prints this text.\n"
+	"  --version\n"
+	"    Prints geml version\n"
+	"\n"
+	"Report bugs to: <" GEML_CONTACT ">\n"
+	;
+
+const char *version_text = "geml " GEML_VERSION "\n";
+
+enum ARGS_ENUM {
+	ARGS_ENUM_VERSION = 260
+};
+
+const struct option long_options[] = {
+	{"verbose", no_argument, NULL, 'v'},
+	{"quiet", no_argument, NULL, 'q'},
+	{"output", required_argument, NULL, 'o'},
+	{"help", no_argument, NULL, 'h'},
+	{"version", no_argument, NULL, ARGS_ENUM_VERSION}
+};
+
+bool args_parse(int argc, char *argv[]) {
+	char *output = NULL;
+
+	int index = 1;
+	int c;
+	while((c = getopt_long(argc, argv, "vqo:h;", long_options, &index)) != -1) {
+		switch (c) {
+		case 'v': // verbose
+			verbosity_inc();
+			break;
+		case 'q': // quiet
+			verbosity_dec();
+			break;
+		case 'o': // output
+			output = optarg;
+			break;
+		case 'h': // help
+			fputs(help_text, stderr);
+			return true;
+		case ARGS_ENUM_VERSION:
+			fputs(version_text, stderr);
+			return true;
+		default:
+			abort();
+		}
+	}
+
+	if (optind < argc) {
+		if (!set_input(argv[optind]))
+			abort();
+		if ((argc - optind) > 1)
+			WARN("Only first input file is accepted, rest is dropped.");
+	}
+	if (output != NULL && !set_output(output))
+		abort();
+
+	return false;
+}