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Report error from parse_nonnegative_int via handler

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This commit is contained in:
Victor Zverovich 2017-10-21 08:37:52 -07:00
parent 0ebdf41efa
commit 932ab2bfca
2 changed files with 16 additions and 13 deletions
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20
include/fmt/format.h
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@ -1924,7 +1924,7 @@ class parse_context {
return 0;
}
void check_arg_id(unsigned index) {
void check_arg_id(unsigned) {
const char *error = 0;
if (!check_no_auto_index(error))
FMT_THROW(format_error(error));
@ -3016,11 +3016,11 @@ constexpr bool is_name_start(Char c) {
return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c;
}
// Parses an unsigned integer advancing it to the end of the parsed input.
// This function assumes that the first character of it is a digit and a
// presence of a non-digit character at the end.
template <typename Iterator>
constexpr unsigned parse_nonnegative_int(Iterator &it) {
// Parses the input as an unsigned integer. This function assumes that the
// first character is a digit and presence of a non-digit character at the end.
// it: an iterator pointing to the beginning of the input range.
template <typename Iterator, typename ErrorHandler>
constexpr unsigned parse_nonnegative_int(Iterator &it, ErrorHandler& handler) {
assert('0' <= *it && *it <= '9');
unsigned value = 0;
do {
@ -3039,7 +3039,7 @@ constexpr unsigned parse_nonnegative_int(Iterator &it) {
// Convert to unsigned to prevent a warning.
unsigned max_int = (std::numeric_limits<int>::max)();
if (value > max_int)
FMT_THROW(format_error("number is too big"));
handler.on_error("number is too big");
return value;
}
@ -3341,7 +3341,7 @@ constexpr Iterator parse_arg_id(Iterator it, Handler& handler) {
return it;
}
if (c >= '0' && c <= '9') {
unsigned index = parse_nonnegative_int(it);
unsigned index = parse_nonnegative_int(it, handler);
if (*it != '}' && *it != ':') {
handler.on_error("invalid format string");
return it;
@ -3464,7 +3464,7 @@ constexpr Iterator parse_format_specs(Iterator it, Handler &handler) {
// Parse width.
if ('0' <= *it && *it <= '9') {
handler.on_width(parse_nonnegative_int(it));
handler.on_width(parse_nonnegative_int(it, handler));
} else if (*it == '{') {
width_handler<Handler, char_type> wh(handler);
it = parse_arg_id(it + 1, wh);
@ -3478,7 +3478,7 @@ constexpr Iterator parse_format_specs(Iterator it, Handler &handler) {
if (*it == '.') {
++it;
if ('0' <= *it && *it <= '9') {
handler.on_precision(parse_nonnegative_int(it));
handler.on_precision(parse_nonnegative_int(it, handler));
} else if (*it == '{') {
precision_handler<Handler, char_type> ph(handler);
it = parse_arg_id(it + 1, ph);

9
include/fmt/printf.h
View File

@ -389,7 +389,8 @@ unsigned printf_context<Char, AF>::parse_header(
if (c >= '0' && c <= '9') {
// Parse an argument index (if followed by '$') or a width possibly
// preceded with '0' flag(s).
unsigned value = internal::parse_nonnegative_int(it);
internal::error_handler eh;
unsigned value = parse_nonnegative_int(it, eh);
if (*it == '$') { // value is an argument index
++it;
arg_index = value;
@ -407,7 +408,8 @@ unsigned printf_context<Char, AF>::parse_header(
parse_flags(spec, it);
// Parse width.
if (*it >= '0' && *it <= '9') {
spec.width_ = internal::parse_nonnegative_int(it);
internal::error_handler eh;
spec.width_ = parse_nonnegative_int(it, eh);
} else if (*it == '*') {
++it;
spec.width_ = visit(internal::PrintfWidthHandler<Char>(spec), get_arg(it));
@ -441,7 +443,8 @@ void printf_context<Char, AF>::format(basic_buffer<Char> &buffer) {
if (*it == '.') {
++it;
if ('0' <= *it && *it <= '9') {
spec.precision_ = static_cast<int>(internal::parse_nonnegative_int(it));
internal::error_handler eh;
spec.precision_ = static_cast<int>(parse_nonnegative_int(it, eh));
} else if (*it == '*') {
++it;
spec.precision_ =