main.c 4.72 KB
Newer Older
Damien's avatar
Damien committed
1
2
3
4
#include <stdint.h>
#include <stdio.h>
#include <string.h>

5
#include "nlr.h"
Damien's avatar
Damien committed
6
#include "misc.h"
7
#include "mpyconfig.h"
Damien's avatar
Damien committed
8
#include "lexer.h"
9
#include "lexerunix.h"
Damien's avatar
Damien committed
10
11
12
13
#include "parse.h"
#include "compile.h"
#include "runtime.h"

Damien's avatar
Damien committed
14
#include <readline/readline.h>
Damien's avatar
Damien committed
15

Damien's avatar
Damien committed
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
bool str_startswith_word(const char *str, const char *head) {
    int i;
    for (i = 0; str[i] && head[i]; i++) {
        if (str[i] != head[i]) {
            return false;
        }
    }
    return head[i] == '\0' && (str[i] == '\0' || !g_unichar_isalpha(str[i]));
}

bool is_compound_stmt(const char *line) {
    // TODO also "compound" if unmatched open bracket
    return
           str_startswith_word(line, "if")
        || str_startswith_word(line, "while")
        || str_startswith_word(line, "for")
        || str_startswith_word(line, "true")
        || str_startswith_word(line, "with")
        || str_startswith_word(line, "def")
        || str_startswith_word(line, "class")
        || str_startswith_word(line, "@");
}

char *str_join(const char *s1, int sep_char, const char *s2) {
    int l1 = strlen(s1);
    int l2 = strlen(s2);
    char *s = m_new(char, l1 + l2 + 2);
    memcpy(s, s1, l1);
    if (sep_char != 0) {
        s[l1] = sep_char;
        l1 += 1;
    }
    memcpy(s + l1, s2, l2);
    return s;
}

void do_repl() {
    for (;;) {
        char *line = readline(">>> ");
        if (line == NULL) {
            // EOF
            return;
        }
        if (is_compound_stmt(line)) {
            for (;;) {
                char *line2 = readline("... ");
                if (line2 == NULL || strlen(line2) == 0) {
                    break;
                }
                char *line3 = str_join(line, '\n', line2);
                m_free(line);
                m_free(line2);
                line = line3;
            }
        }
71

72
        py_lexer_t *lex = py_lexer_new_from_str_len("<stdin>", line, strlen(line), false);
Damien's avatar
Damien committed
73
        py_parse_node_t pn = py_parse(lex, PY_PARSE_SINGLE_INPUT);
74
75
        py_lexer_free(lex);

Damien's avatar
Damien committed
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
        if (pn != PY_PARSE_NODE_NULL) {
            //py_parse_node_show(pn, 0);
            bool comp_ok = py_compile(pn, true);
            if (comp_ok) {
                py_obj_t module_fun = rt_make_function_from_id(1);
                if (module_fun != py_const_none) {
                    nlr_buf_t nlr;
                    if (nlr_push(&nlr) == 0) {
                        rt_call_function_0(module_fun);
                        nlr_pop();
                    } else {
                        // uncaught exception
                        py_obj_print((py_obj_t)nlr.ret_val);
                        printf("\n");
                    }
                }
            }
        }
Damien's avatar
Damien committed
94
    }
Damien's avatar
Damien committed
95
96
97
}

void do_file(const char *file) {
98
    py_lexer_t *lex = py_lexer_new_from_file(file);
Damien's avatar
Damien committed
99
100
101
    //const char *pysrc = "def f():\n  x=x+1\n  print(42)\n";
    //py_lexer_t *lex = py_lexer_from_str_len("<>", pysrc, strlen(pysrc), false);
    if (lex == NULL) {
Damien's avatar
Damien committed
102
        return;
Damien's avatar
Damien committed
103
104
105
    }

    if (0) {
Damien's avatar
Damien committed
106
        // just tokenise
Damien's avatar
Damien committed
107
108
109
110
        while (!py_lexer_is_kind(lex, PY_TOKEN_END)) {
            py_token_show(py_lexer_cur(lex));
            py_lexer_to_next(lex);
        }
Damien's avatar
Damien committed
111
112
        py_lexer_free(lex);

Damien's avatar
Damien committed
113
    } else {
Damien's avatar
Damien committed
114
115
116
        // compile

        py_parse_node_t pn = py_parse(lex, PY_PARSE_FILE_INPUT);
117
118
        py_lexer_free(lex);

119
120
        if (pn != PY_PARSE_NODE_NULL) {
            //printf("----------------\n");
121
            //parse_node_show(pn, 0);
122
            //printf("----------------\n");
Damien's avatar
Damien committed
123
            bool comp_ok = py_compile(pn, false);
124
            //printf("----------------\n");
Damien's avatar
Damien committed
125

126
127
128
129
130
#if MICROPY_EMIT_CPYTHON
            if (!comp_ok) {
                printf("compile error\n");
            }
#else
Damien's avatar
Damien committed
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
            if (1 && comp_ok) {
                // execute it
                py_obj_t module_fun = rt_make_function_from_id(1);
                if (module_fun != py_const_none) {
                    nlr_buf_t nlr;
                    if (nlr_push(&nlr) == 0) {
                        py_obj_t ret = rt_call_function_0(module_fun);
                        printf("done! got: ");
                        py_obj_print(ret);
                        printf("\n");
                        nlr_pop();
                    } else {
                        // uncaught exception
                        printf("exception: ");
                        py_obj_print((py_obj_t)nlr.ret_val);
                        printf("\n");
                    }
                }
149
            }
Damien's avatar
Damien committed
150
#endif
Damien's avatar
Damien committed
151
152
        }
    }
Damien's avatar
Damien committed
153
}
Damien's avatar
Damien committed
154

Damien's avatar
Damien committed
155
156
157
158
159
160
161
162
163
164
165
166
int main(int argc, char **argv) {
    qstr_init();
    rt_init();

    if (argc == 1) {
        do_repl();
    } else if (argc == 2) {
        do_file(argv[1]);
    } else {
        printf("usage: py [<file>]\n");
        return 1;
    }
Damien's avatar
Damien committed
167
168
169
170
171
    rt_deinit();

    //printf("total bytes = %d\n", m_get_total_bytes_allocated());
    return 0;
}