168 lines
3.2 KiB
C
168 lines
3.2 KiB
C
#include <xp/lisp/lisp.h>
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#include <xp/c/stdio.h>
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#include <xp/c/ctype.h>
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#include <xp/c/stdcli.h>
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#ifdef __linux
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#include <mcheck.h>
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#endif
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static int get_char (xp_cint_t* ch, void* arg)
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{
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xp_cint_t c;
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c = xp_fgetc(xp_stdin);
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if (c == XP_EOF) {
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if (xp_ferror(xp_stdin)) return -1;
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c = XP_EOF;
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}
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*ch = c;
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return 0;
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}
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int to_int (const xp_char_t* str)
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{
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int r = 0;
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while (*str != XP_CHAR('\0')) {
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if (!xp_isdigit(*str)) break;
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r = r * 10 + (*str - XP_CHAR('0'));
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str++;
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}
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return r;
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}
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#include <locale.h>
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int handle_cli_error (
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const xp_cli_t* cli, int code,
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const xp_char_t* name, const xp_char_t* value)
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{
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xp_printf (XP_TEXT("usage: %s /memory=nnn /increment=nnn\n"), cli->verb);
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if (code == XP_CLI_ERROR_INVALID_OPTNAME) {
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xp_printf (XP_TEXT("unknown option - %s\n"), name);
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}
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else if (code == XP_CLI_ERROR_MISSING_OPTNAME) {
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xp_printf (XP_TEXT("missing option - %s\n"), name);
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}
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else if (code == XP_CLI_ERROR_REDUNDANT_OPTVAL) {
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xp_printf (XP_TEXT("redundant value %s for %s\n"), value, name);
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}
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else if (code == XP_CLI_ERROR_MISSING_OPTVAL) {
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xp_printf (XP_TEXT("missing value for %s\n"), name);
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}
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else if (code == XP_CLI_ERROR_MEMORY) {
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xp_printf (XP_TEXT("memory error in processing %s\n"), name);
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}
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else {
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xp_printf (XP_TEXT("error code: %d\n"), code);
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}
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return -1;
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}
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xp_cli_t* parse_cli (int argc, xp_char_t* argv[])
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{
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static const xp_char_t* optsta[] =
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{
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XP_TEXT("/"), XP_TEXT("--"), XP_NULL
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};
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static xp_cliopt_t opts[] =
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{
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{ XP_TEXT("memory"), XP_CLI_OPTNAME | XP_CLI_OPTVAL },
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{ XP_TEXT("increment"), XP_CLI_OPTNAME | XP_CLI_OPTVAL },
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{ XP_NULL, 0 }
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};
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static xp_cli_t cli =
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{
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handle_cli_error,
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optsta,
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XP_TEXT("="),
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opts
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};
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if (xp_parsecli (argc, argv, &cli) == -1) return XP_NULL;
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return &cli;
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}
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int xp_main (int argc, xp_char_t* argv[])
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{
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xp_lisp_t* lisp;
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xp_lisp_obj_t* obj;
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xp_cli_t* cli;
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int mem, inc;
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#ifdef __linux
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mtrace ();
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#endif
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setlocale (LC_ALL, "");
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if ((cli = parse_cli (argc, argv)) == XP_NULL) return -1;
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mem = to_int(xp_getclioptval(cli, XP_TEXT("memory")));
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inc = to_int(xp_getclioptval(cli, XP_TEXT("increment")));
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xp_clearcli (cli);
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if (mem <= 0) {
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xp_fprintf (xp_stderr,
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XP_TEXT("error: invalid memory size given\n"));
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return -1;
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}
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lisp = xp_lisp_new (mem, inc);
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if (lisp == NULL) {
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xp_fprintf (xp_stderr,
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XP_TEXT("error: cannot create a lisp instance\n"));
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return -1;
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}
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xp_printf (XP_TEXT("LISP 0.0001\n"));
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xp_lisp_set_creader (lisp, get_char, NULL);
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for (;;) {
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xp_printf (XP_TEXT("%s> "), argv[0]);
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obj = xp_lisp_read (lisp);
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if (obj == NULL) {
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if (lisp->error != XP_LISP_ERR_END &&
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lisp->error != XP_LISP_ERR_ABORT) {
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xp_fprintf (xp_stderr,
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XP_TEXT("error while reading: %d\n"), lisp->error);
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}
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if (lisp->error < XP_LISP_ERR_SYNTAX) break;
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continue;
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}
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if ((obj = xp_lisp_eval (lisp, obj)) != NULL) {
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xp_lisp_print (lisp, obj);
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xp_printf (XP_TEXT("\n"));
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}
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else {
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if (lisp->error == XP_LISP_ERR_ABORT) break;
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xp_fprintf (xp_stderr,
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XP_TEXT("error while reading: %d\n"), lisp->error);
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}
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/*
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printf ("-----------\n");
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xp_lisp_print (lisp, obj);
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printf ("\n-----------\n");
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*/
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}
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xp_lisp_free (lisp);
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#ifdef __linux
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muntrace ();
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#endif
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return 0;
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}
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