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bx: add more debug scaffolding

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-12-14 23:00:24 +01:00
parent 2ea53a45b7
commit 17df882a57
1 changed files with 21 additions and 4 deletions
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25
miscutils/bc.c
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@ -2965,7 +2965,7 @@ static BC_STATUS zbc_lex_next(BcLex *l)
l->buf + l->i);
ERROR_RETURN(s =) zcommon_lex_token(l);
} while (!s && l->t.t == BC_LEX_WHITESPACE);
dbg_lex("next l->t.t:%d", l->t.t);
dbg_lex("l->t.t from string:%d", l->t.t);
RETURN_STATUS(s);
}
@ -4094,6 +4094,7 @@ static BC_STATUS zbc_parse_endBody(BcParse *p, bool brace)
bc_vec_pop(&p->flags);
flag_ptr = BC_PARSE_TOP_FLAG_PTR(p);
dbg_lex("%s:%d setting BC_PARSE_FLAG_IF_END bit", __func__, __LINE__);
*flag_ptr = (*flag_ptr | BC_PARSE_FLAG_IF_END);
if (p->l.t.t == BC_LEX_KEY_ELSE)
@ -4151,6 +4152,7 @@ static void bc_parse_noElse(BcParse *p)
size_t *label;
uint8_t *flag_ptr = BC_PARSE_TOP_FLAG_PTR(p);
dbg_lex("%s:%d clearing BC_PARSE_FLAG_IF_END bit", __func__, __LINE__);
*flag_ptr = (*flag_ptr & ~(BC_PARSE_FLAG_IF_END));
ip = bc_vec_top(&p->exits);
@ -4200,7 +4202,7 @@ static BC_STATUS zbc_parse_else(BcParse *p)
{
BcInstPtr ip;
dbg_lex("%s:%d p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
dbg_lex_enter("%s:%d entered", __func__, __LINE__);
if (!BC_PARSE_IF_END(p)) RETURN_STATUS(bc_error_bad_token());
ip.idx = p->func->labels.len;
@ -4209,12 +4211,14 @@ static BC_STATUS zbc_parse_else(BcParse *p)
bc_parse_push(p, BC_INST_JUMP);
bc_parse_pushIndex(p, ip.idx);
dbg_lex("%s:%d calling bc_parse_noElse()", __func__, __LINE__);
bc_parse_noElse(p);
bc_vec_push(&p->exits, &ip);
bc_vec_push(&p->func->labels, &ip.idx);
bc_parse_startBody(p, BC_PARSE_FLAG_ELSE);
dbg_lex_done("%s:%d done", __func__, __LINE__);
RETURN_STATUS(zbc_lex_next(&p->l));
}
#if ERRORS_ARE_FATAL
@ -4520,9 +4524,11 @@ static BC_STATUS zbc_parse_body(BcParse *p, bool brace)
BcStatus s = BC_STATUS_SUCCESS;
uint8_t *flag_ptr = bc_vec_top(&p->flags);
dbg_lex_enter("%s:%d entered", __func__, __LINE__);
*flag_ptr &= ~(BC_PARSE_FLAG_BODY);
if (*flag_ptr & BC_PARSE_FLAG_FUNC_INNER) {
dbg_lex("%s:%d BC_PARSE_FLAG_FUNC_INNER", __func__, __LINE__);
if (!brace) RETURN_STATUS(bc_error_bad_token());
p->auto_part = p->l.t.t != BC_LEX_KEY_AUTO;
@ -4535,10 +4541,12 @@ static BC_STATUS zbc_parse_body(BcParse *p, bool brace)
if (p->l.t.t == BC_LEX_NLINE) s = zbc_lex_next(&p->l);
}
else {
dbg_lex("%s:%d !BC_PARSE_FLAG_FUNC_INNER", __func__, __LINE__);
s = zbc_parse_stmt(p);
if (!s && !brace) s = zbc_parse_endBody(p, false);
}
dbg_lex_done("%s:%d done", __func__, __LINE__);
RETURN_STATUS(s);
}
#if ERRORS_ARE_FATAL
@ -4553,6 +4561,7 @@ static BC_STATUS zbc_parse_stmt(BcParse *p)
dbg_lex_enter("%s:%d entered, p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
switch (p->l.t.t) {
case BC_LEX_NLINE:
dbg_lex_done("%s:%d done (seen BC_LEX_NLINE)", __func__, __LINE__);
RETURN_STATUS(zbc_lex_next(&p->l));
case BC_LEX_KEY_ELSE:
@ -4564,6 +4573,7 @@ static BC_STATUS zbc_parse_stmt(BcParse *p)
++p->nbraces;
s = zbc_lex_next(&p->l);
if (s) RETURN_STATUS(s);
dbg_lex_done("%s:%d done (returning zbc_parse_body())", __func__, __LINE__);
RETURN_STATUS(zbc_parse_body(p, true));
case BC_LEX_KEY_AUTO:
@ -4573,10 +4583,13 @@ static BC_STATUS zbc_parse_stmt(BcParse *p)
p->auto_part = false;
if (BC_PARSE_IF_END(p)) {
bc_parse_noElse(p);
dbg_lex_done("%s:%d done (BC_PARSE_IF_END is true)", __func__, __LINE__);
RETURN_STATUS(BC_STATUS_SUCCESS);
}
if (BC_PARSE_BODY(p))
if (BC_PARSE_BODY(p)) {
dbg_lex_done("%s:%d done (returning zbc_parse_body())", __func__, __LINE__);
RETURN_STATUS(zbc_parse_body(p, false));
}
break;
}
@ -4705,6 +4718,7 @@ static BcStatus bc_parse_expr_empty_ok(BcParse *p, uint8_t flags, BcParseNext ne
unsigned nparens, nrelops;
bool paren_first, paren_expr, rprn, done, get_token, assign, bin_last;
dbg_lex_enter("%s:%d entered", __func__, __LINE__);
paren_first = p->l.t.t == BC_LEX_LPAREN;
nparens = nrelops = 0;
paren_expr = rprn = done = get_token = assign = false;
@ -4803,8 +4817,10 @@ static BcStatus bc_parse_expr_empty_ok(BcParse *p, uint8_t flags, BcParseNext ne
get_token = false;
break;
}
else if (!paren_expr)
else if (!paren_expr) {
dbg_lex_done("%s:%d done (returning EMPTY_EXP)", __func__, __LINE__);
return BC_STATUS_PARSE_EMPTY_EXP;
}
--nparens;
paren_expr = rprn = true;
@ -4952,6 +4968,7 @@ static BcStatus bc_parse_expr_empty_ok(BcParse *p, uint8_t flags, BcParseNext ne
bc_parse_push(p, BC_INST_POP);
}
dbg_lex_done("%s:%d done", __func__, __LINE__);
return s;
}