X-Git-Url: https://git.draconx.ca/gitweb/cdecl99.git/blobdiff_plain/f5e2e659f116a49afd3b9d9f37553646e62fa4d4..c807d652225fe170ee442591bb2a0bfc91c8618c:/src/cdecl99.c

diff --git a/src/cdecl99.c b/src/cdecl99.c
index 6eb07cc..5ddc889 100644
--- a/src/cdecl99.c
+++ b/src/cdecl99.c
@@ -1,21 +1,283 @@
+/*
+ * Command line utility for making sense of C declarations.
+ * Copyright © 2011-2012, 2020-2023 Nick Bowler
+ *
+ * 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 3 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <locale.h>
+#include <assert.h>
+#include <stdarg.h>
+
+#include <getopt.h>
+#include <gettext.h>
+#include <readline.h>
+#include <localcharset.h>
+#include <mbswidth.h>
+
+#include "cdecl99.h"
 #include "cdecl.h"
+#include "help.h"
+#include "xtra.h"
+#include "copysym.h"
+#include "options.h"
 
-int main(int argc, char **argv)
+static const char *progname = "cdecl99";
+static bool interactive = true;
+
+void print_error(const char *fmt, ...)
 {
-	struct cdecl *decl;
+	va_list(ap);
 
-	if (argc < 2) {
-		fprintf(stderr, "usage: cdecl99 decl\n");
-		return EXIT_FAILURE;
+	if (!interactive)
+		fprintf(stderr, "%s: ", progname);
+	fprintf(stderr, "%s", _("error: "));
+
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
+	va_end(ap);
+
+	fprintf(stderr, "\n");
+}
+
+static void print_version(void)
+{
+	const char *copysign = copyright_symbol(locale_charset());
+
+	puts(PACKAGE_STRING);
+	printf("Copyright %s 2023 Nick Bowler.\n", copysign);
+	puts("License GPLv3+: GNU GPL version 3 or any later version.");
+	puts("This is free software: you are free to change and redistribute it.");
+	puts("There is NO WARRANTY, to the extent permitted by law.");
+}
+
+static void print_usage(FILE *f)
+{
+	fprintf(f, _("Usage: %s [options]\n"), progname);
+	if (f != stdout)
+		fprintf(f, _("Try %s --help for more information.\n"),
+		           progname);
+}
+
+static void print_help(const struct option *lopts)
+{
+	struct lopt_help help = {0};
+	const struct option *opt;
+
+	print_usage(stdout);
+
+	puts(_("This is \"cdecl99\": a command-line tool for parsing and constructing\n"
+               "complicated C declarations."));
+	putchar('\n');
+
+	puts(_("Options:"));
+	for (opt = lopts; opt->name; opt++) {
+		if (!lopt_get_help(opt, &help))
+			continue;
+
+		help_print_option(opt, help.arg, help.desc, 20);
 	}
+	putchar('\n');
 
-	decl = cdecl_parse_decl(argv[1]);
-	if (!decl) {
-		return EXIT_FAILURE;
+	puts(_("For more information, see the cdecl99(1) man page."));
+	putchar('\n');
+
+	/*
+	 * TRANSLATORS: Please add *another line* indicating where users should
+	 * report translation bugs.
+	 */
+	printf(_("Report bugs to <%s>.\n"), PACKAGE_BUGREPORT);
+}
+
+static int is_blank_line(const char *line)
+{
+	return !line[strspn(line, " \t")];
+}
+
+static int repl(void)
+{
+	char *line;
+
+	for (; (line = readline("> ")); free(line)) {
+		if (!is_blank_line(line))
+			add_history(line);
+
+		if (run_command(line, true) > 0)
+			break;
 	}
 
-	cdecl_free(decl);
+	free(line);
 	return 0;
 }
+
+static int repl_cmdline(unsigned count, char **commands)
+{
+	int ret = 0;
+	unsigned i;
+
+	for (i = 0; i < count; i++) {
+		int rc = run_command(commands[i], false);
+		if (rc < 0)
+			ret = -1;
+		else if (rc > 0)
+			break;
+	}
+
+	return ret;
+}
+
+static int repl_noninteractive(void)
+{
+	int rc, ret = 0, saved_errno;
+	char *line = NULL;
+	size_t n;
+
+	while (getline(&line, &n, stdin) >= 0) {
+		char *c = strchr(line, '\n');
+		if (c)
+			*c = '\0';
+
+		rc = run_command(line, false);
+		if (rc < 0)
+			ret = -1;
+		else if (rc > 0)
+			break;
+	}
+
+	saved_errno = errno;
+	free(line);
+
+	if (ferror(stdin)) {
+		print_error("%s", strerror(saved_errno));
+		return -1;
+	}
+
+	return ret;
+}
+
+/* Initialize gettext */
+static void init_i18n(void)
+{
+	if (!ENABLE_NLS)
+		return;
+
+	setlocale(LC_ALL, "");
+	bindtextdomain(PACKAGE, LOCALEDIR);
+	textdomain(PACKAGE);
+}
+
+enum {
+	INIT_EXIT_SUCCESS = -1,
+	INIT_EXIT_FAILURE = -2
+};
+
+static int initialize(int argc, char **argv)
+{
+	int i, opt, quiet = 0, execute = 0;
+	const char *filename = NULL;
+
+	XTRA_PACKED_LOPTS(lopts);
+
+	if (argc > 0)
+		progname = argv[0];
+
+	init_i18n();
+
+	while ((opt = getopt_long(argc, argv, SOPT_STRING, lopts, 0)) != -1) {
+		switch (opt) {
+		case 'q':
+			quiet = 1;
+			break;
+		case 'b':
+			interactive = false;
+			break;
+		case 'i':
+			interactive = true;
+			break;
+		case 'f':
+			filename = optarg;
+			break;
+		case 'e':
+			argv[execute++] = optarg;
+			break;
+		case 'V':
+			print_version();
+			return INIT_EXIT_SUCCESS;
+		case 'H':
+			print_help(lopts);
+			return INIT_EXIT_SUCCESS;
+		default:
+			print_usage(stderr);
+			return INIT_EXIT_FAILURE;
+		}
+	}
+
+	if (optind < argc) {
+		fprintf(stderr, "%s: ", progname);
+		fprintf(stderr, _("excess command-line arguments:"));
+		for (i = optind; i < argc; i++) {
+			fprintf(stderr, " %s", argv[i]);
+		}
+		fprintf(stderr, "\n");
+		print_usage(stderr);
+		return INIT_EXIT_FAILURE;
+	}
+
+	/* --filename and --execute imply --batch. */
+	if (filename || execute)
+		interactive = false;
+
+	/* --batch implies --quiet */
+	if (interactive && !quiet)
+		print_version();
+
+	/* --execute supersedes --filename */
+	if (filename && !execute) {
+		if (!freopen(filename, "r", stdin)) {
+			print_error("failed to open %s: %s", filename,
+			                                strerror(errno));
+			return INIT_EXIT_FAILURE;
+		}
+	}
+
+	return execute;
+}
+
+int main(int argc, char **argv)
+{
+	int rc, execute;
+
+	switch ((execute = initialize(argc, argv))) {
+	case INIT_EXIT_SUCCESS: return EXIT_SUCCESS;
+	case INIT_EXIT_FAILURE: return EXIT_FAILURE;
+	}
+
+	if (interactive)
+		rc = repl();
+	else if (execute)
+		rc = repl_cmdline(execute, argv);
+	else
+		rc = repl_noninteractive();
+
+	if (rc != 0)
+		return EXIT_FAILURE;
+	return EXIT_SUCCESS;
+}