llvm/flang/lib/parser/message.cc
2018-04-02 15:51:04 -07:00

107 lines
2.5 KiB
C++

#include "message.h"
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstring>
namespace Fortran {
namespace parser {
std::ostream &operator<<(std::ostream &o, const MessageFixedText &t) {
for (std::size_t j{0}; j < t.size(); ++j) {
o << t.str()[j];
}
return o;
}
std::string MessageFixedText::ToString() const {
return std::string{str_, /*not in std::*/ strnlen(str_, bytes_)};
}
MessageFormattedText::MessageFormattedText(MessageFixedText text, ...)
: isFatal_{text.isFatal()} {
const char *p{text.str()};
std::string asString;
if (p[text.size()] != '\0') {
// not NUL-terminated
asString = text.ToString();
p = asString.data();
}
char buffer[256];
va_list ap;
va_start(ap, text);
vsnprintf(buffer, sizeof buffer, p, ap);
va_end(ap);
string_ = buffer;
}
MessageFixedText MessageExpectedText::AsMessageFixedText() const {
if (str_ != nullptr) {
return {str_, bytes_};
}
static char chars[256];
if (chars[1] == '\0') {
// one-time initialization of array used for permanant single-byte string
// pointers
for (std::size_t j{0}; j < sizeof chars; ++j) {
chars[j] = j;
}
}
return {&chars[static_cast<unsigned char>(singleton_)], 1};
}
Provenance Message::Emit(
std::ostream &o, const CookedSource &cooked, bool echoSourceLine) const {
Provenance provenance{provenance_};
if (cookedSourceLocation_ != nullptr) {
provenance = cooked.GetProvenance(cookedSourceLocation_).start();
}
if (!context_ || context_->Emit(o, cooked, false) != provenance) {
cooked.allSources().Identify(o, provenance, "", echoSourceLine);
}
o << " ";
if (isFatal_) {
o << "ERROR: ";
}
if (string_.empty()) {
if (isExpectedText_) {
std::string goal{text_.ToString()};
if (goal == "\n") {
o << "expected end of line"_err_en_US;
} else {
o << MessageFormattedText("expected '%s'"_err_en_US, goal.data())
.MoveString();
}
} else {
o << text_;
}
} else {
o << string_;
}
o << '\n';
return provenance;
}
void Messages::Emit(
std::ostream &o, const char *prefix, bool echoSourceLines) const {
for (const auto &msg : messages_) {
if (prefix) {
o << prefix;
}
if (msg.context()) {
o << "In the context ";
}
msg.Emit(o, cooked_, echoSourceLines);
}
}
bool Messages::AnyFatalError() const {
for (const auto &msg : messages_) {
if (msg.isFatal()) {
return true;
}
}
return false;
}
} // namespace parser
} // namespace Fortran