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Disallow leading zeros in arg-id

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This commit is contained in:
Victor Zverovich 2018-11-08 08:48:56 -08:00
parent 34030deca9
commit e01579231d
2 changed files with 9 additions and 0 deletions
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8
include/fmt/format.h
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@ -1547,6 +1547,10 @@ FMT_CONSTEXPR bool is_name_start(Char c) {
template <typename Iterator, typename ErrorHandler>
FMT_CONSTEXPR unsigned parse_nonnegative_int(Iterator &it, ErrorHandler &&eh) {
assert('0' <= *it && *it <= '9');
if (*it == '0') {
++it;
return 0;
}
unsigned value = 0;
// Convert to unsigned to prevent a warning.
unsigned max_int = (std::numeric_limits<int>::max)();
@ -1574,6 +1578,10 @@ template <typename Char, typename ErrorHandler>
FMT_CONSTEXPR unsigned parse_nonnegative_int(
const Char *&begin, const Char *end, ErrorHandler &&eh) {
assert(begin != end && '0' <= *begin && *begin <= '9');
if (*begin == '0') {
++begin;
return 0;
}
unsigned value = 0;
// Convert to unsigned to prevent a warning.
unsigned max_int = (std::numeric_limits<int>::max)();

1
test/format-test.cc
View File

@ -750,6 +750,7 @@ TEST(FormatterTest, ArgErrors) {
EXPECT_THROW_MSG(format("{?}"), format_error, "invalid format string");
EXPECT_THROW_MSG(format("{0"), format_error, "invalid format string");
EXPECT_THROW_MSG(format("{0}"), format_error, "argument index out of range");
EXPECT_THROW_MSG(format("{00}", 42), format_error, "invalid format string");
char format_str[BUFFER_SIZE];
safe_sprintf(format_str, "{%u", INT_MAX);