- str = do_format(cdecl_declare, decl);
- if (!str)
- goto out;
-
- printf("%s\n", str);
- ret = 1;
-out:
- cdecl_free(decl);
- return ret;
-}
-
-static int cmd_quit(const char *cmd, const char *arg)
-{
- return 0;
-}
-
-static int cmd_help(const char *cmd, const char *arg);
-
-static const struct command {
- char name[16];
- int (*func)(const char *cmd, const char *arg);
- const char *blurb;
-} commands[] = {
- { "explain", cmd_explain, "Explain a C declaration." },
- { "simplify", cmd_simplify, "Simplify a C declaration." },
- { "declare", cmd_declare, "Construct a C declaration." },
- { "type", cmd_declare, "Construct a C type name." },
- { "help", cmd_help, "Print this list of commands." },
- { "quit", cmd_quit, "Quit the program." },
- { "exit", cmd_quit, NULL }
-};
-static const size_t ncommands = sizeof commands / sizeof commands[0];
-
-static int cmd_help(const char *cmd, const char *arg)
-{
- for (size_t i = 0; i < ncommands; i++) {
- if (!commands[i].blurb)
- continue;
-
- printf("%s -- %s\n", commands[i].name, commands[i].blurb);
- }
-
- return 1;
-}
-
-/*
- * Ensure that the first n characters of str equal the entire (null-terminated)
- * string cmd.
- */
-static int cmd_cmp(const char *str, const char *cmd, size_t n)
-{
- size_t cmdlen = strlen(cmd);
-
- if (n < cmdlen)
- return -1;
- if (n > cmdlen)
- return 1;
- return memcmp(str, cmd, n);
-}
-
-static int run_command(const char *line)
-{
- const char *cmd = line + strspn(line, " \t");
- const char *arg = cmd + strcspn(cmd, " \t");
-
- if (cmd[0] == '\0')
- return 1;
-
- for (size_t i = 0; i < ncommands; i++) {
- if (cmd_cmp(cmd, commands[i].name, arg-cmd) != 0)
- continue;
-
- return commands[i].func(cmd, arg);
- }
-
- fprintf(stderr, "Undefined command: %.*s\n", (int)(arg-cmd), cmd);
- return -1;