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bc: for(;;) fix from upstream

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-12-21 00:35:22 +01:00
parent 047154472a
commit 52caa007e3
2 changed files with 12 additions and 1 deletions
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8
miscutils/bc.c
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@ -4205,8 +4205,14 @@ static BC_STATUS zbc_parse_for(BcParse *p)
if (p->l.t.t != BC_LEX_SCOLON)
s = zbc_parse_expr(p, BC_PARSE_REL);
else
else {
// Set this for the next call to bc_parse_number.
// This is safe to set because the current token is a semicolon,
// which has no string requirement.
bc_vec_string(&p->l.t.v, 1, "1");
bc_parse_pushNUM(p);
s = bc_POSIX_does_not_allow_empty_X_expression_in_for("condition");
}
if (s) RETURN_STATUS(s);
if (p->l.t.t != BC_LEX_SCOLON) RETURN_STATUS(bc_error_bad_token());

5
testsuite/bc.tests
View File

@ -51,6 +51,11 @@ testing "bc if 0 else if 1" \
"2\n9\n" \
"" "if (0) 1 else if (1) 2; 9"
testing "bc for(;;)" \
"bc" \
"2\n3\n2\n9\n" \
"" "i=2; for (;;) { 2; if(--i==0) break; 3; }; 9"
testing "bc define auto" \
"bc" \
"8\n9\n" \