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json: fix handling of 32-bit parameters

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See YosysHQ/yosys#1671 for rationale.  Also, added some validation
to our parser, so that out-of-range values are reported and the user
knows they should update yosys.
This commit is contained in:
Marcin Kościelnicki 2020-02-01 17:23:05 +01:00
parent 85f4452b0a
commit 24e3f8417e
3 changed files with 14 additions and 16 deletions
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11
3rdparty/json11/json11.cpp vendored
View File

@ -24,7 +24,8 @@
#include <cmath>
#include <cstdlib>
#include <cstdio>
#include <limits>
#include <climits>
#include <cerrno>
namespace json11 {
@ -589,9 +590,11 @@ struct JsonParser final {
return fail("invalid " + esc(str[i]) + " in number");
}
if (str[i] != '.' && str[i] != 'e' && str[i] != 'E'
&& (i - start_pos) <= static_cast<size_t>(std::numeric_limits<int>::digits10)) {
return std::atoi(str.c_str() + start_pos);
if (str[i] != '.' && str[i] != 'e' && str[i] != 'E') {
errno = 0;
long val = std::strtol(str.c_str() + start_pos, nullptr, 0);
if (!errno && val >= INT_MIN && val <= INT_MAX)
return int(val);
}
// Decimal part

8
frontend/json_frontend.cc
View File

@ -105,11 +105,15 @@ struct JsonFrontendImpl
Property parse_property(const Json &val) const
{
if (val.is_number())
if (val.is_number()) {
if (val.int_value() != val.number_value())
log_error("Found an out-of-range integer parameter in the JSON file.\n"
"Please regenerate the input file with an up-to-date version of yosys.\n");
return Property(val.int_value(), 32);
else
} else {
return Property::from_string(val.string_value());
}
}
template <typename TFunc> void foreach_attr(const Json &obj, TFunc Func) const
{

11
json/jsonwrite.cc
View File

@ -45,15 +45,6 @@ std::string get_string(std::string str)
std::string get_name(IdString name, Context *ctx) { return get_string(name.c_str(ctx)); }
void write_parameter_value(std::ostream &f, const Property &value)
{
if (value.size() == 32 && value.is_fully_def()) {
f << stringf("%d", value.as_int64());
} else {
f << get_string(value.to_string());
}
}
void write_parameters(std::ostream &f, Context *ctx, const std::unordered_map<IdString, Property> &parameters,
bool for_module = false)
{
@ -61,7 +52,7 @@ void write_parameters(std::ostream &f, Context *ctx, const std::unordered_map<Id
for (auto &param : parameters) {
f << stringf("%s\n", first ? "" : ",");
f << stringf(" %s%s: ", for_module ? "" : " ", get_name(param.first, ctx).c_str());
write_parameter_value(f, param.second);
f << get_string(param.second.to_string());
first = false;
}
}