Implement the interactive cdecl99 loop.

[cdecl99.git] / src / cdecl99.c

diff --git a/src/cdecl99.c b/src/cdecl99.c
index 6eb07cc71c5188ee765ea86f536963701103881e..76e64bc4d1932d91c0eaa6148a4169b77143562a 100644 (file)
--- a/src/cdecl99.c
+++ b/src/cdecl99.c
@@ -1,21 +1,74 @@
+#include <config.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <getopt.h>
+#include "readline.h"
 #include "cdecl.h"
 
-int main(int argc, char **argv)
+static const char *progname = "cdecl99";
+static const char sopts[] = "VH";
+static const struct option lopts[] = {
+       { "version", 0, NULL, 'V' },
+       { "help",    0, NULL, 'H' },
+       { 0 }
+};
+
+static void print_version(void)
+{
+       puts(PACKAGE_STRING);
+       puts("Copyright (C) 2011 Nick Bowler.");
+       puts("License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.");
+       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);
+}
+
+static void print_help(void)
+{
+       print_usage(stdout);
+       puts("Detailed help coming soon.");
+}
+
+static int repl(void)
 {
        struct cdecl *decl;
+       print_version();
 
-       if (argc < 2) {
-               fprintf(stderr, "usage: cdecl99 decl\n");
-               return EXIT_FAILURE;
+       for (char *line; (line = readline("> ")); free(line)) {
+               decl = cdecl_parse_decl(line);
+               cdecl_free(decl);
        }
 
-       decl = cdecl_parse_decl(argv[1]);
-       if (!decl) {
-               return EXIT_FAILURE;
+       return 0;
+}
+
+int main(int argc, char **argv)
+{
+       int opt;
+
+       if (argc > 0)
+               progname = argv[0];
+
+       while ((opt = getopt_long(argc, argv, sopts, lopts, NULL)) != -1) {
+               switch (opt) {
+               case 'V':
+                       print_version();
+                       return EXIT_SUCCESS;
+               case 'H':
+                       print_help();
+                       return EXIT_SUCCESS;
+               default:
+                       print_usage(stderr);
+                       return EXIT_FAILURE;
+               }
        }
 
-       cdecl_free(decl);
-       return 0;
+       if (repl() != 0)
+               return EXIT_FAILURE;
+
+       return EXIT_SUCCESS;
 }