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Enhance chibicc

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This commit is contained in:
Justine Tunney 2020-12-09 04:00:48 -08:00
parent 8da931a7f6
commit 9df2cef4c4
52 changed files with 2606 additions and 2004 deletions
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26
third_party/chibicc/tokenize.c vendored
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@ -1,6 +1,6 @@
#include "third_party/chibicc/chibicc.h"
#define LOOKINGAT(TOK, OP) lookingat(TOK, OP, strlen(OP))
#define LOOKINGAT(TOK, OP) (!memcmp(TOK, OP, strlen(OP)))
// Input file
static File *current_file;
@ -75,29 +75,18 @@ void warn_tok(Token *tok, char *fmt, ...) {
ap);
}
forceinline int compare_strings(const char *a, const char *b, size_t n) {
size_t i = 0;
if (!n-- || a == b) return 0;
while (a[i] == b[i] && b[i] && i < n) ++i;
return (a[i] & 0xff) - (b[i] & 0xff);
}
static int is_space(int c) {
return c == ' ' || c == '\t' || c == '\r' || c == '\n' || c == '\f' ||
c == '\v';
}
static bool lookingat(const char *a, const char *b, size_t n) {
return !compare_strings(a, b, n);
}
// Consumes the current token if it matches `op`.
bool equal(Token *tok, char *op, size_t n) {
return n == tok->len && !compare_strings(tok->loc, op, tok->len);
return n == tok->len && !memcmp(tok->loc, op, tok->len);
}
bool consume(Token **rest, Token *tok, char *str, size_t n) {
if (n == tok->len && !compare_strings(tok->loc, str, n)) {
if (n == tok->len && !memcmp(tok->loc, str, n)) {
*rest = tok->next;
return true;
}
@ -106,9 +95,12 @@ bool consume(Token **rest, Token *tok, char *str, size_t n) {
}
// Ensure that the current token is `op`.
Token *skip(Token *tok, char *op) {
if (!EQUAL(tok, op)) error_tok(tok, "expected '%s'", op);
return tok->next;
Token *skip(Token *tok, char op) {
if (tok->len == 1 && *tok->loc == op) {
return tok->next;
} else {
error_tok(tok, "expected '%c'", op);
}
}
// Create a new token and add it as the next token of `cur`.