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Diffstat (limited to 'mixutils/mixvm_loop.c')
-rw-r--r-- | mixutils/mixvm_loop.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/mixutils/mixvm_loop.c b/mixutils/mixvm_loop.c new file mode 100644 index 0000000..ef84444 --- /dev/null +++ b/mixutils/mixvm_loop.c @@ -0,0 +1,160 @@ +/* -*-c-*- -------------- mixvm_loop.c : + * Implementation of mix vm command loop. + * ------------------------------------------------------------------ + * $Id: mixvm_loop.c,v 1.15 2005/09/20 19:43:13 jao Exp $ + * ------------------------------------------------------------------ + * Copyright (C) 2000, 2001, 2002, 2004 Free Software Foundation, Inc. + * + * 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 <stdio.h> +#include <string.h> + +#include <mixlib/mix.h> +#include <mixlib/mix_config.h> +#include <mixlib/mix_vm.h> +#include <mixlib/mix_device.h> +#include <mixlib/mix_vm_dump.h> + +#ifdef MAKE_GUILE +#include <mixguile/mixguile.h> +#endif + +#include "mixvm_command.h" +#include "mixvm_loop.h" + +#ifdef HAVE_LIBHISTORY +# include <readline/history.h> +#else +# define add_history(x) ((void)0) +#endif + +#ifdef HAVE_LIBREADLINE +# include <readline/readline.h> +#else /* !HAVE_LIBREADLINE */ +static char * +readline (char *prompt) +{ + enum {LINE_LEN = 256}; + char *line = g_new (char, LINE_LEN); + printf ("%s", prompt); + return fgets (line, LINE_LEN, stdin); +} +#endif /* HAVE_LIBREADLINE */ + +/* A static variable for holding the line. */ +static char *line_read = (char *)NULL; + +#define PROMPT_LEN 128 +static char PROMPT[PROMPT_LEN + 1] = {'M', 'I', 'X', ' ', '>'}; +static const char *CONFIG_FILE_ = "mixvm.config"; +static const char *PROMPT_KEY_ = "Prompt"; + +/* Read a string, and return a pointer to it. Returns NULL on EOF. */ +static char * +rl_gets () +{ + /* If the buffer has already been allocated, return the memory + to the free pool. */ + if (line_read) + { + g_free (line_read); + line_read = (char *)NULL; + } + + /* Get a line from the user. */ + line_read = readline ((char *)PROMPT); + + /* If the line has any text in it, save it on the history. */ + if (line_read && *line_read) + add_history (line_read); + + return (line_read); +} + + +/* The main command loop of the virtual machine */ +static mix_config_t *config_ = NULL; + +static mix_vm_cmd_dispatcher_t * +init_mixvm_ (const gchar *file, gboolean use_emacs) +{ + static const gchar *HISTORY_FILE = "mixvm.history"; + static gint HISTORY_SIZE = 100; + config_ = mix_config_new (NULL, CONFIG_FILE_); + + mix_config_set_autosave (config_, TRUE); + if (!mix_config_get_history_file (config_)) + mix_config_set_history_file (config_, HISTORY_FILE); + if (mix_config_get_history_size (config_) == 0) + mix_config_set_history_size (config_, HISTORY_SIZE); + + mix_vmloop_set_prompt (mix_config_get (config_, PROMPT_KEY_)); + + return mixvm_cmd_init (config_, (char *)file, use_emacs); +} + +void +mix_vmloop_set_prompt (const gchar *prompt) +{ + if (prompt) + { + g_snprintf (PROMPT, PROMPT_LEN, "%s ", prompt); + mix_config_update (config_, PROMPT_KEY_, prompt); + } +} + +static void +loop_ (int argc, char *argv[]) +{ + while ( mixvm_cmd_exec (rl_gets ()) ) + ; + mix_config_delete (config_); +} + +void +mix_vmloop (int argc, char *argv[], gboolean initfile, + const gchar *file, gboolean use_emacs) +{ +#ifdef MAKE_GUILE + mix_vm_cmd_dispatcher_t *dis = init_mixvm_ (file, use_emacs); + mixguile_init (argc, argv, initfile, loop_, dis); +#else + (void) init_mixvm_ (file, use_emacs); + loop_ (argc, argv); +#endif +} + +/* run a program and exit */ +void +mix_vmrun (const gchar *code_file, gboolean dump, gboolean ptime) +{ + gchar *time_cmd = ptime? g_strdup ("stime on") : g_strdup ("stime off"); + gchar *run_cmd = g_strdup ("run"); + gchar *dump_cmd = dump? g_strdup ("pall") : NULL; + gboolean result; + + init_mixvm_ (code_file, FALSE); + result = mixvm_cmd_exec (time_cmd) && mixvm_cmd_exec (run_cmd); + if (result && dump) mixvm_cmd_exec (dump_cmd); + mix_config_set_autosave (config_, FALSE); + mix_config_delete (config_); + g_free(time_cmd); + g_free(run_cmd); + if (dump_cmd) g_free(dump_cmd); +} |