1 /*
2 * Copyright 2013 Ecole Normale Superieure
3 *
4 * Use of this software is governed by the MIT license
5 *
6 * Written by Sven Verdoolaege,
7 * Ecole Normale Superieure, 45 rue d'Ulm, 75230 Paris, France
8 */
9
10 #include <string.h>
11
12 /* Extract a mapping key from the token "tok".
13 * Return KEY_ERROR on error, i.e., if "tok" does not
14 * correspond to any known key.
15 */
KEY_EXTRACT(__isl_keep isl_stream * s,struct isl_token * tok)16 static KEY KEY_EXTRACT(__isl_keep isl_stream *s, struct isl_token *tok)
17 {
18 isl_bool has_string;
19 char *name;
20 KEY key;
21 isl_ctx *ctx;
22
23 has_string = isl_token_has_str(tok);
24 if (has_string < 0)
25 return KEY_ERROR;
26 if (!has_string) {
27 isl_stream_error(s, tok, "expecting key");
28 return KEY_ERROR;
29 }
30
31 ctx = isl_stream_get_ctx(s);
32 name = isl_token_get_str(ctx, tok);
33 if (!name)
34 return KEY_ERROR;
35
36 for (key = 0; key < KEY_END; ++key) {
37 if (KEY_STR[key] && !strcmp(name, KEY_STR[key]))
38 break;
39 }
40 free(name);
41
42 if (key >= KEY_END)
43 isl_die(ctx, isl_error_invalid, "unknown key",
44 return KEY_ERROR);
45 return key;
46 }
47
48 /* Read a key from "s" and return the corresponding enum.
49 * Return KEY_ERROR on error, i.e., if the first token
50 * on the stream does not correspond to any known key.
51 */
KEY_GET(__isl_keep isl_stream * s)52 static KEY KEY_GET(__isl_keep isl_stream *s)
53 {
54 struct isl_token *tok;
55 KEY key;
56
57 tok = isl_stream_next_token(s);
58 key = KEY_EXTRACT(s, tok);
59 isl_token_free(tok);
60
61 return key;
62 }
63