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Add __has_include and __has_include_next support

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tcctok.h:
- Add __has_include_next

tccpp.c:
- New functions parse_include and get_include_file
- Changed expr_preprocess and preprocess
This commit is contained in:
herman ten brugge 2022-08-14 12:17:31 +02:00
parent 1de025c13a
commit 47dc6e6d7b
2 changed files with 136 additions and 88 deletions
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223
tccpp.c
View File

@ -1494,8 +1494,98 @@ static void maybe_run_test(TCCState *s)
define_push(tok, MACRO_OBJ, NULL, NULL);
}
static int parse_include(char *buf, size_t size_buf, int last)
{
int c;
skip_spaces();
if (ch == '<') {
c = '>';
goto read_name;
} else if (ch == '\"') {
char *q;
c = ch;
read_name:
inp();
q = buf;
while (ch != c && ch != '\n' && ch != CH_EOF) {
if ((q - buf) < size_buf - 1)
*q++ = ch;
if (ch == '\\') {
if (handle_stray_noerror() == 0)
--q;
} else
inp();
}
if (ch != c)
goto error;
*q = '\0';
minp();
#if 0
/* eat all spaces and comments after include */
/* XXX: slightly incorrect */
while (ch1 != '\n' && ch1 != CH_EOF)
inp();
#endif
} else {
int len;
/* computed #include : concatenate everything up to linefeed,
the result must be one of the two accepted forms.
Don't convert pp-tokens to tokens here. */
parse_flags = (PARSE_FLAG_PREPROCESS
| PARSE_FLAG_LINEFEED
| (parse_flags & PARSE_FLAG_ASM_FILE));
next();
buf[0] = '\0';
while (tok != TOK_LINEFEED && tok != last) {
pstrcat(buf, size_buf, get_tok_str(tok, &tokc));
next();
}
len = strlen(buf);
if (tok == last)
unget_tok(0);
/* check syntax and remove '<>|""' */
if ((len < 2 || ((buf[0] != '"' || buf[len-1] != '"') &&
(buf[0] != '<' || buf[len-1] != '>'))))
error:
tcc_error("'#include' expects \"FILENAME\" or <FILENAME>");
c = buf[len-1];
memmove(buf, buf + 1, len - 2);
buf[len - 2] = '\0';
}
return c;
}
static int get_include_file(TCCState *s1, int i, int c,
char *buf, char *buf1, size_t size_buf1)
{
const char *path;
if (i == 0) {
/* check absolute include path */
if (!IS_ABSPATH(buf))
return -1;
buf1[0] = 0;
} else if (i == 1) {
/* search in file's dir if "header.h" */
if (c != '\"')
return -1;
path = file->true_filename;
pstrncpy(buf1, path, tcc_basename(path) - path);
} else {
/* search in all the include paths */
int j = i - 2, k = j - s1->nb_include_paths;
path = k < 0 ? s1->include_paths[j] : s1->sysinclude_paths[k];
pstrcpy(buf1, size_buf1, path);
pstrcat(buf1, size_buf1, "/");
}
pstrcat(buf1, size_buf1, buf);
return 0;
}
/* eval an expression for #if/#elif */
static int expr_preprocess(void)
static int expr_preprocess(TCCState *s1)
{
int c, t;
TokenString *str;
@ -1510,11 +1600,15 @@ static int expr_preprocess(void)
t = tok;
if (t == '(')
next_nomacro();
if (tok < TOK_IDENT)
expect("identifier");
if (tcc_state->run_test)
maybe_run_test(tcc_state);
c = define_find(tok) != 0;
if (tok == TOK___HAS_INCLUDE || tok == TOK___HAS_INCLUDE_NEXT)
c = 1;
else {
if (tok < TOK_IDENT)
expect("identifier");
if (tcc_state->run_test)
maybe_run_test(tcc_state);
c = define_find(tok) != 0;
}
if (t == '(') {
next_nomacro();
if (tok != ')')
@ -1522,15 +1616,34 @@ static int expr_preprocess(void)
}
tok = TOK_CINT;
tokc.i = c;
} else if (1 && tok == TOK___HAS_INCLUDE) {
next(); /* XXX check if correct to use expansion */
skip('(');
while (tok != ')' && tok != TOK_EOF)
next();
} else if (tok == TOK___HAS_INCLUDE ||
tok == TOK___HAS_INCLUDE_NEXT) {
int c, n, i, fd, save_tok = tok;
char buf[1024];
next_nomacro();
if (tok != '(')
expect("(");
ch = file->buf_ptr[0];
c = parse_include(buf, sizeof(buf), ')');
next_nomacro();
if (tok != ')')
expect("')'");
expect("')'");
tok = TOK_CINT;
tokc.i = 0;
i = save_tok == TOK___HAS_INCLUDE_NEXT ? file->include_next_index + 1 : 0;
n = 2 + s1->nb_include_paths + s1->nb_sysinclude_paths;
for (; i < n; i++) {
char buf1[sizeof file->filename];
if (get_include_file(s1, i, c, buf, buf1, sizeof(buf1)))
continue;
if ((fd = open(buf1, O_RDONLY | O_BINARY)) >= 0) {
close(fd);
tokc.i = 1;
break;
}
}
} else if (tok >= TOK_IDENT) {
/* if undefined macro, replace with zero, check for func-like */
t = tok;
@ -1842,55 +1955,8 @@ ST_FUNC void preprocess(int is_bof)
case TOK_INCLUDE_NEXT:
ch = file->buf_ptr[0];
/* XXX: incorrect if comments : use next_nomacro with a special mode */
skip_spaces();
if (ch == '<') {
c = '>';
goto read_name;
} else if (ch == '\"') {
c = ch;
read_name:
inp();
q = buf;
while (ch != c && ch != '\n' && ch != CH_EOF) {
if ((q - buf) < sizeof(buf) - 1)
*q++ = ch;
if (ch == '\\') {
if (handle_stray_noerror() == 0)
--q;
} else
inp();
}
*q = '\0';
minp();
#if 0
/* eat all spaces and comments after include */
/* XXX: slightly incorrect */
while (ch1 != '\n' && ch1 != CH_EOF)
inp();
#endif
} else {
int len;
/* computed #include : concatenate everything up to linefeed,
the result must be one of the two accepted forms.
Don't convert pp-tokens to tokens here. */
parse_flags = (PARSE_FLAG_PREPROCESS
| PARSE_FLAG_LINEFEED
| (parse_flags & PARSE_FLAG_ASM_FILE));
next();
buf[0] = '\0';
while (tok != TOK_LINEFEED) {
pstrcat(buf, sizeof(buf), get_tok_str(tok, &tokc));
next();
}
len = strlen(buf);
/* check syntax and remove '<>|""' */
if ((len < 2 || ((buf[0] != '"' || buf[len-1] != '"') &&
(buf[0] != '<' || buf[len-1] != '>'))))
tcc_error("'#include' expects \"FILENAME\" or <FILENAME>");
c = buf[len-1];
memmove(buf, buf + 1, len - 2);
buf[len - 2] = '\0';
}
c = parse_include(buf, sizeof(buf), 0);
if (s1->include_stack_ptr >= s1->include_stack + INCLUDE_STACK_SIZE)
tcc_error("#include recursion too deep");
@ -1899,31 +1965,9 @@ ST_FUNC void preprocess(int is_bof)
for (; i < n; ++i) {
char buf1[sizeof file->filename];
CachedInclude *e;
const char *path;
if (i == 0) {
/* check absolute include path */
if (!IS_ABSPATH(buf))
continue;
buf1[0] = 0;
} else if (i == 1) {
/* search in file's dir if "header.h" */
if (c != '\"')
continue;
/* https://savannah.nongnu.org/bugs/index.php?50847 */
path = file->true_filename;
pstrncpy(buf1, path, tcc_basename(path) - path);
} else {
/* search in all the include paths */
int j = i - 2, k = j - s1->nb_include_paths;
path = k < 0 ? s1->include_paths[j] : s1->sysinclude_paths[k];
pstrcpy(buf1, sizeof(buf1), path);
pstrcat(buf1, sizeof(buf1), "/");
}
pstrcat(buf1, sizeof(buf1), buf);
if (get_include_file(s1, i, c, buf, buf1, sizeof(buf1)))
continue;
e = search_cached_include(s1, buf1, 0);
if (e && (define_find(e->ifndef_macro) || e->once == pp_once)) {
/* no need to parse the include because the 'ifndef macro'
@ -1965,7 +2009,7 @@ include_done:
c = 1;
goto do_ifdef;
case TOK_IF:
c = expr_preprocess();
c = expr_preprocess(s1);
goto do_if;
case TOK_IFDEF:
c = 0;
@ -1981,7 +2025,10 @@ include_done:
file->ifndef_macro = tok;
}
}
c = (define_find(tok) != 0) ^ c;
if (tok == TOK___HAS_INCLUDE || tok == TOK___HAS_INCLUDE_NEXT)
c = 1 ^ c;
else
c = (define_find(tok) != 0) ^ c;
do_if:
if (s1->ifdef_stack_ptr >= s1->ifdef_stack + IFDEF_STACK_SIZE)
tcc_error("memory full (ifdef)");
@ -2004,7 +2051,7 @@ include_done:
if (c == 1) {
c = 0;
} else {
c = expr_preprocess();
c = expr_preprocess(s1);
s1->ifdef_stack_ptr[-1] = c;
}
test_else:

1
tcctok.h
View File

@ -94,6 +94,7 @@
DEF(TOK___VA_ARGS__, "__VA_ARGS__")
DEF(TOK___COUNTER__, "__COUNTER__")
DEF(TOK___HAS_INCLUDE, "__has_include")
DEF(TOK___HAS_INCLUDE_NEXT, "__has_include_next")
/* special identifiers */
DEF(TOK___FUNC__, "__func__")