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Factor some code

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Three places that skip (and store) tokens in some fashion can
be factored a bit.
This commit is contained in:
Michael Matz 2017-03-06 21:43:48 +01:00
parent 328b06a3fc
commit 21b12ea10d
1 changed files with 47 additions and 63 deletions
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110
tccgen.c
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@ -5902,6 +5902,42 @@ static void block(int *bsym, int *csym, int is_expr)
}
}
/* This skips over a stream of tokens containing balanced {} and ()
pairs, stopping at outer ',' ';' and '}'. If STR then allocates
and stores the skipped tokens in *STR. This doesn't check if
() and {} are nested correctly, i.e. "({)}" is accepted. */
static void skip_or_save_block(TokenString **str)
{
int level = 0;
if (str)
*str = tok_str_alloc();
while ((level > 0 || (tok != '}' && tok != ',' && tok != ';'))) {
int t;
if (tok == TOK_EOF) {
if (str || level > 0)
tcc_error("unexpected end of file");
else
break;
}
if (str)
tok_str_add_tok(*str);
t = tok;
next();
if (t == '{' || t == '(') {
level++;
} else if (t == '}' || t == ')') {
level--;
if (level == 0)
break;
}
}
if (str) {
tok_str_add(*str, -1);
tok_str_add(*str, 0);
}
}
#define EXPR_CONST 1
#define EXPR_ANY 2
@ -6256,7 +6292,7 @@ static void init_putz(Section *sec, unsigned long c, int size)
static void decl_initializer(CType *type, Section *sec, unsigned long c,
int first, int size_only)
{
int index, array_length, n, no_oblock, nb, parlevel, parlevel1, i;
int index, array_length, n, no_oblock, nb, i;
int size1, align1;
int have_elem;
Sym *s, *f;
@ -6429,25 +6465,9 @@ static void decl_initializer(CType *type, Section *sec, unsigned long c,
But GNU C supports it, so we need to recurse even into
subfields of structs and arrays when size_only is set. */
/* just skip expression */
parlevel = parlevel1 = 0;
while ((parlevel > 0 || parlevel1 > 0 ||
(tok != '}' && tok != ',')) && tok != -1) {
if (tok == '(')
parlevel++;
else if (tok == ')') {
if (parlevel == 0 && parlevel1 == 0)
break;
parlevel--;
}
else if (tok == '{')
parlevel1++;
else if (tok == '}') {
if (parlevel == 0 && parlevel1 == 0)
break;
parlevel1--;
}
next();
}
do {
skip_or_save_block(NULL);
} while (tok != '}' && tok != ',' && tok != -1);
} else {
if (!have_elem) {
/* This should happen only when we haven't parsed
@ -6472,7 +6492,6 @@ static void decl_initializer_alloc(CType *type, AttributeDef *ad, int r,
int has_init, int v, int scope)
{
int size, align, addr, data_offset;
int level;
ParseState saved_parse_state = {0};
TokenString *init_str = NULL;
Section *sec;
@ -6500,33 +6519,18 @@ static void decl_initializer_alloc(CType *type, AttributeDef *ad, int r,
if (!has_init)
tcc_error("unknown type size");
/* get all init string */
init_str = tok_str_alloc();
if (has_init == 2) {
init_str = tok_str_alloc();
/* only get strings */
while (tok == TOK_STR || tok == TOK_LSTR) {
tok_str_add_tok(init_str);
next();
}
} else {
level = 0;
while (level > 0 || (tok != ',' && tok != ';')) {
if (tok < 0)
tcc_error("unexpected end of file in initializer");
tok_str_add_tok(init_str);
if (tok == '{')
level++;
else if (tok == '}') {
level--;
if (level <= 0) {
next();
break;
}
}
next();
}
}
tok_str_add(init_str, -1);
tok_str_add(init_str, 0);
} else {
skip_or_save_block(&init_str);
}
/* compute size */
save_parse_state(&saved_parse_state);
@ -7029,7 +7033,6 @@ static int decl0(int l, int is_for_loop_init)
the compilation unit only if they are used */
if ((type.t & (VT_INLINE | VT_STATIC)) ==
(VT_INLINE | VT_STATIC)) {
int block_level;
struct InlineFunc *fn;
const char *filename;
@ -7037,28 +7040,9 @@ static int decl0(int l, int is_for_loop_init)
fn = tcc_malloc(sizeof *fn + strlen(filename));
strcpy(fn->filename, filename);
fn->sym = sym;
fn->func_str = tok_str_alloc();
block_level = 0;
for(;;) {
int t;
if (tok == TOK_EOF)
tcc_error("unexpected end of file");
tok_str_add_tok(fn->func_str);
t = tok;
next();
if (t == '{') {
block_level++;
} else if (t == '}') {
block_level--;
if (block_level == 0)
break;
}
}
tok_str_add(fn->func_str, -1);
tok_str_add(fn->func_str, 0);
dynarray_add(&tcc_state->inline_fns, &tcc_state->nb_inline_fns, fn);
skip_or_save_block(&fn->func_str);
dynarray_add(&tcc_state->inline_fns,
&tcc_state->nb_inline_fns, fn);
} else {
/* compute text section */
cur_text_section = ad.section;