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formatting.cpp
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353 lines (328 loc) · 13.1 KB
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#include <cpptrace/formatting.hpp>
#include <cpptrace/utils.hpp>
#include "utils/optional.hpp"
#include "utils/utils.hpp"
#include "snippets/snippet.hpp"
#include <memory>
#include <cstdio>
#include <string>
#include <functional>
#include <iostream>
#include <sstream>
namespace cpptrace {
class formatter::impl {
struct {
std::string header = "Stack trace (most recent call first):";
color_mode color = color_mode::automatic;
address_mode addresses = address_mode::raw;
path_mode paths = path_mode::full;
bool snippets = false;
int context_lines = 2;
bool columns = true;
bool show_filtered_frames = true;
std::function<bool(const stacktrace_frame&)> filter;
} options;
public:
void header(std::string header) {
options.header = std::move(header);
}
void colors(formatter::color_mode mode) {
options.color = mode;
}
void addresses(formatter::address_mode mode) {
options.addresses = mode;
}
void paths(path_mode mode) {
options.paths = mode;
}
void snippets(bool snippets) {
options.snippets = snippets;
}
void snippet_context(int lines) {
options.context_lines = lines;
}
void columns(bool columns) {
options.columns = columns;
}
void filtered_frame_placeholders(bool show) {
options.show_filtered_frames = show;
}
void filter(std::function<bool(const stacktrace_frame&)> filter) {
options.filter = filter;
}
std::string format(const stacktrace_frame& frame, detail::optional<bool> color_override = detail::nullopt) const {
std::ostringstream oss;
print_frame_inner(oss, frame, color_override.value_or(options.color == color_mode::always));
return std::move(oss).str();
}
std::string format(const stacktrace& trace, detail::optional<bool> color_override = detail::nullopt) const {
std::ostringstream oss;
print_internal(oss, trace, false, color_override);
return std::move(oss).str();
}
void print(const stacktrace_frame& frame, detail::optional<bool> color_override = detail::nullopt) const {
print(std::cout, frame, color_override);
}
void print(
std::ostream& stream,
const stacktrace_frame& frame,
detail::optional<bool> color_override = detail::nullopt
) const {
print_frame_internal(stream, frame, color_override);
}
void print(
std::FILE* file,
const stacktrace_frame& frame,
detail::optional<bool> color_override = detail::nullopt
) const {
auto str = format(frame, color_override);
std::fwrite(str.data(), 1, str.size(), file);
}
void print(const stacktrace& trace, detail::optional<bool> color_override = detail::nullopt) const {
print(std::cout, trace, color_override);
}
void print(
std::ostream& stream,
const stacktrace& trace,
detail::optional<bool> color_override = detail::nullopt
) const {
print_internal(stream, trace, true, color_override);
}
void print(
std::FILE* file,
const stacktrace& trace,
detail::optional<bool> color_override = detail::nullopt
) const {
auto str = format(trace, color_override);
std::fwrite(str.data(), 1, str.size(), file);
}
private:
bool stream_is_tty(std::ostream& stream) const {
// not great, but it'll have to do
return (&stream == &std::cout && isatty(stdout_fileno))
|| (&stream == &std::cerr && isatty(stderr_fileno));
}
void maybe_ensure_virtual_terminal_processing(std::ostream& stream, bool color) const {
if(color && stream_is_tty(stream)) {
detail::enable_virtual_terminal_processing_if_needed();
}
}
bool should_do_color(std::ostream& stream, detail::optional<bool> color_override) const {
bool do_color = options.color == color_mode::always || color_override.value_or(false);
if(
(options.color == color_mode::automatic || options.color == color_mode::always) &&
(!color_override || color_override.unwrap() != false) &&
stream_is_tty(stream)
) {
detail::enable_virtual_terminal_processing_if_needed();
do_color = true;
}
return do_color;
}
void print_internal(std::ostream& stream, const stacktrace& trace, bool newline_at_end, detail::optional<bool> color_override) const {
bool do_color = should_do_color(stream, color_override);
maybe_ensure_virtual_terminal_processing(stream, do_color);
print_internal(stream, trace, newline_at_end, do_color);
}
void print_internal(std::ostream& stream, const stacktrace& trace, bool newline_at_end, bool color) const {
if(!options.header.empty()) {
stream << options.header << '\n';
}
std::size_t counter = 0;
const auto& frames = trace.frames;
if(frames.empty()) {
stream << "<empty trace>\n";
return;
}
const auto frame_number_width = detail::n_digits(static_cast<int>(frames.size()) - 1);
for(const auto& frame : frames) {
if(options.filter && !options.filter(frame)) {
if(!options.show_filtered_frames) {
counter++;
continue;
}
print_placeholder_frame(stream, frame_number_width, counter);
} else {
print_frame_internal(stream, frame, color, frame_number_width, counter);
if(frame.line.has_value() && !frame.filename.empty() && options.snippets) {
auto snippet = detail::get_snippet(
frame.filename,
frame.line.value(),
options.context_lines,
color
);
if(!snippet.empty()) {
stream << '\n';
stream << snippet;
}
}
}
if(newline_at_end || &frame != &frames.back()) {
stream << '\n';
}
counter++;
}
}
void print_frame_internal(
std::ostream& stream,
const stacktrace_frame& frame,
bool color,
unsigned frame_number_width,
std::size_t counter
) const {
microfmt::print(stream, "#{<{}} ", frame_number_width, counter);
print_frame_inner(stream, frame, color);
}
void print_placeholder_frame(std::ostream& stream, unsigned frame_number_width, std::size_t counter) const {
microfmt::print(stream, "#{<{}} (filtered)", frame_number_width, counter);
}
void print_frame_internal(
std::ostream& stream,
const stacktrace_frame& frame,
detail::optional<bool> color_override
) const {
bool do_color = should_do_color(stream, color_override);
maybe_ensure_virtual_terminal_processing(stream, do_color);
print_frame_inner(stream, frame, do_color);
}
void print_frame_inner(std::ostream& stream, const stacktrace_frame& frame, bool color) const {
const auto reset = color ? RESET : "";
const auto green = color ? GREEN : "";
const auto yellow = color ? YELLOW : "";
const auto blue = color ? BLUE : "";
if(frame.is_inline) {
microfmt::print(stream, "{<{}} ", 2 * sizeof(frame_ptr) + 2, "(inlined)");
} else if(options.addresses != address_mode::none) {
auto address = options.addresses == address_mode::raw ? frame.raw_address : frame.object_address;
microfmt::print(stream, "{}0x{>{}:0h}{} ", blue, 2 * sizeof(frame_ptr), address, reset);
}
if(!frame.symbol.empty()) {
microfmt::print(stream, "in {}{}{}", yellow, frame.symbol, reset);
}
if(!frame.filename.empty()) {
microfmt::print(
stream,
"{}at {}{}{}",
frame.symbol.empty() ? "" : " ",
green,
options.paths == path_mode::full ? frame.filename : detail::basename(frame.filename, true),
reset
);
if(frame.line.has_value()) {
microfmt::print(stream, ":{}{}{}", blue, frame.line.value(), reset);
if(frame.column.has_value() && options.columns) {
microfmt::print(stream, ":{}{}{}", blue, frame.column.value(), reset);
}
}
}
}
};
formatter::formatter() : pimpl(new impl) {}
formatter::~formatter() {
delete pimpl;
}
formatter::formatter(formatter&& other) : pimpl(detail::exchange(other.pimpl, nullptr)) {}
formatter::formatter(const formatter& other) : pimpl(new impl(*other.pimpl)) {}
formatter& formatter::operator=(formatter&& other) {
if(pimpl) {
delete pimpl;
}
pimpl = detail::exchange(other.pimpl, nullptr);
return *this;
}
formatter& formatter::operator=(const formatter& other) {
if(pimpl) {
delete pimpl;
}
pimpl = new impl(*other.pimpl);
return *this;
}
formatter& formatter::header(std::string header) {
pimpl->header(std::move(header));
return *this;
}
formatter& formatter::colors(color_mode mode) {
pimpl->colors(mode);
return *this;
}
formatter& formatter::addresses(address_mode mode) {
pimpl->addresses(mode);
return *this;
}
formatter& formatter::paths(path_mode mode) {
pimpl->paths(mode);
return *this;
}
formatter& formatter::snippets(bool snippets) {
pimpl->snippets(snippets);
return *this;
}
formatter& formatter::snippet_context(int lines) {
pimpl->snippet_context(lines);
return *this;
}
formatter& formatter::columns(bool columns) {
pimpl->columns(columns);
return *this;
}
formatter& formatter::filtered_frame_placeholders(bool show) {
pimpl->filtered_frame_placeholders(show);
return *this;
}
formatter& formatter::filter(std::function<bool(const stacktrace_frame&)> filter) {
pimpl->filter(std::move(filter));
return *this;
}
std::string formatter::format(const stacktrace_frame& frame) const {
return pimpl->format(frame);
}
std::string formatter::format(const stacktrace_frame& frame, bool color) const {
return pimpl->format(frame, color);
}
std::string formatter::format(const stacktrace& trace) const {
return pimpl->format(trace);
}
std::string formatter::format(const stacktrace& trace, bool color) const {
return pimpl->format(trace, color);
}
void formatter::print(const stacktrace& trace) const {
pimpl->print(trace);
}
void formatter::print(const stacktrace& trace, bool color) const {
pimpl->print(trace, color);
}
void formatter::print(std::ostream& stream, const stacktrace& trace) const {
pimpl->print(stream, trace);
}
void formatter::print(std::ostream& stream, const stacktrace& trace, bool color) const {
pimpl->print(stream, trace, color);
}
void formatter::print(std::FILE* file, const stacktrace& trace) const {
pimpl->print(file, trace);
}
void formatter::print(std::FILE* file, const stacktrace& trace, bool color) const {
pimpl->print(file, trace, color);
}
void formatter::print(const stacktrace_frame& frame) const {
pimpl->print(frame);
}
void formatter::print(const stacktrace_frame& frame, bool color) const {
pimpl->print(frame, color);
}
void formatter::print(std::ostream& stream, const stacktrace_frame& frame) const {
pimpl->print(stream, frame);
}
void formatter::print(std::ostream& stream, const stacktrace_frame& frame, bool color) const {
pimpl->print(stream, frame, color);
}
void formatter::print(std::FILE* file, const stacktrace_frame& frame) const {
pimpl->print(file, frame);
}
void formatter::print(std::FILE* file, const stacktrace_frame& frame, bool color) const {
pimpl->print(file, frame, color);
}
const formatter& get_default_formatter() {
static formatter formatter;
return formatter;
}
}