summaryrefslogtreecommitdiff
path: root/MLKReadEvalPrintLoop.m
blob: 4ccc33993ea1f3eb14dd02588e5a72a411fc80a7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
/* -*- mode: objc; coding: utf-8 -*- */
/* Étoilisp/Mulklisp, a Common Lisp subset for the Étoilé runtime.
 * Copyright (C) 2008  Matthias Andreas Benkard.
 *
 * 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 <http://www.gnu.org/licenses/>.
 */

#import "MLKDynamicContext.h"
#import "MLKInterpreter.h"
#import "MLKLexicalEnvironment.h"
#import "MLKPackage.h"
#import "MLKReadEvalPrintLoop.h"
#import "MLKReader.h"
#import "NSObject-MLKPrinting.h"
#import "runtime-compatibility.h"

#import <Foundation/NSAutoreleasePool.h>
#import <Foundation/NSException.h>
#import <Foundation/NSString.h>

#import <editline/history.h>
#import <editline/readline.h>
#import <histedit.h>


static int _argc;
static char **_argv;


static const char *prompt (EditLine *e) {
  NS_DURING
    {
      MLKPackage *package = [[MLKDynamicContext currentContext]
                              valueForSymbol:[[MLKPackage
                                                findPackage:@"COMMON-LISP"]
                                               intern:@"*PACKAGE*"]];

      return [[NSString stringWithFormat:@"%@> ", [package name]] UTF8String];
    }
  NS_HANDLER
    {
      printf ("Caught an unhandled exception.\nName: %s\nReason: %s\n",
              [[localException name] UTF8String],
              [[localException reason] UTF8String]);
      return "> ";
    }
  NS_ENDHANDLER
}


@implementation MLKReadEvalPrintLoop : NSObject
+(void) run
{
  EditLine *editline;
  History *commands;
  HistEvent event;

  editline = el_init (_argv[0], stdin, stdout, stderr);
  el_set (editline, EL_PROMPT, &prompt);
  el_set (editline, EL_EDITOR, "emacs");

  commands = history_init();
  history (commands, &event, H_SETSIZE, 1000);
  el_set (editline, EL_HIST, history, commands);
  
  printf ("This is Toilet Lisp, version 0.0.1.\n");
  printf ("Please make yourself at home.\n");

  while (1)
    {
      const char *line;
      ssize_t line_length;

      line = el_gets (editline, &line_length);

      if (line_length > 1)
        {
          NSAutoreleasePool *pool;
          id result;
          id code;

          pool = [[NSAutoreleasePool alloc] init];

          history (commands, &event, H_ENTER, line);

          NS_DURING
            {
              code = [MLKReader readFromString:[NSString stringWithUTF8String:line]];

              result = [MLKInterpreter eval:code
                                       inLexicalContext:[MLKLexicalContext
                                                          globalContext]
                                       withEnvironment:[MLKLexicalEnvironment
                                                         globalEnvironment]];
              
              if (result)
                printf ("%s\n", [[result descriptionForLisp] UTF8String]);
              else
                printf ("()\n");
            }
          NS_HANDLER
            {
              printf ("Caught an unhandled exception.\nName: %s\nReason: %s\n",
                      [[localException name] UTF8String],
                      [[localException reason] UTF8String]);
            }
          NS_ENDHANDLER

          RELEASE (pool);
        }

      //free (line);
    }

  history_end (commands);
  el_end (editline);
}
@end


int main (int argc, char **argv)
{
  _argc = argc;
  _argv = argv;
  NSAutoreleasePool *pool;
  pool = [[NSAutoreleasePool alloc] init];
  [MLKReadEvalPrintLoop run];
  RELEASE (pool);
  return 0;
}