extract_key.c
1.32 KB
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/*
* Copyright 2013 Ecole Normale Superieure
*
* Use of this software is governed by the MIT license
*
* Written by Sven Verdoolaege,
* Ecole Normale Superieure, 45 rue d'Ulm, 75230 Paris, France
*/
#include <string.h>
/* Extract a mapping key from the token "tok".
* Return KEY_ERROR on error, i.e., if "tok" does not
* correspond to any known key.
*/
static KEY extract_key(__isl_keep isl_stream *s, struct isl_token *tok)
{
int type;
char *name;
KEY key;
isl_ctx *ctx;
if (!tok)
return KEY_ERROR;
type = isl_token_get_type(tok);
if (type != ISL_TOKEN_IDENT && type != ISL_TOKEN_STRING) {
isl_stream_error(s, tok, "expecting key");
return KEY_ERROR;
}
ctx = isl_stream_get_ctx(s);
name = isl_token_get_str(ctx, tok);
if (!name)
return KEY_ERROR;
for (key = 0; key < KEY_END; ++key) {
if (!strcmp(name, key_str[key]))
break;
}
free(name);
if (key >= KEY_END)
isl_die(ctx, isl_error_invalid, "unknown key",
return KEY_ERROR);
return key;
}
/* Read a key from "s" and return the corresponding enum.
* Return KEY_ERROR on error, i.e., if the first token
* on the stream does not correspond to any known key.
*/
static KEY get_key(__isl_keep isl_stream *s)
{
struct isl_token *tok;
KEY key;
tok = isl_stream_next_token(s);
key = extract_key(s, tok);
isl_token_free(tok);
return key;
}