Move DebugChar into its own file

Change-Id: Ia40549e5d0b78ece8dd0722c3a5a032b9915f24b
This commit is contained in:
Rebecca Turner 2024-03-22 16:41:42 -07:00
parent 62332c1250
commit 5ec2efb686
7 changed files with 54 additions and 32 deletions

View file

@ -0,0 +1,22 @@
#include <boost/io/ios_state.hpp>
#include <iomanip>
#include <iostream>
#include "escape-char.hh"
namespace nix {
std::ostream & operator<<(std::ostream & s, MaybeHexEscapedChar c)
{
boost::io::ios_flags_saver _ifs(s);
if (isprint(c.c)) {
s << static_cast<char>(c.c);
} else {
s << "\\x" << std::hex << std::setfill('0') << std::setw(2)
<< (static_cast<unsigned int>(c.c) & 0xff);
}
return s;
}
} // namespace nix

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@ -0,0 +1,22 @@
#pragma once
#include <ostream>
namespace nix {
/**
* A struct that prints a debug representation of a character, like `\x1f` for
* non-printable characters, or the character itself for other characters.
*
* Note that these are suitable for human readable output, but further care is
* necessary to include them in C++ strings to avoid running into adjacent
* hex-like characters. (`"puppy\x1bdoggy"` parses as `"puppy" "\x1bd" "oggy"`
* and errors because 0x1bd is too big for a `char`.)
*/
struct MaybeHexEscapedChar
{
char c;
};
std::ostream & operator<<(std::ostream & s, MaybeHexEscapedChar c);
} // namespace nix

View file

@ -8,6 +8,7 @@ libutil_sources = files(
'config.cc', 'config.cc',
'english.cc', 'english.cc',
'error.cc', 'error.cc',
'escape-char.cc',
'exit.cc', 'exit.cc',
'experimental-features.cc', 'experimental-features.cc',
'filesystem.cc', 'filesystem.cc',
@ -49,6 +50,7 @@ libutil_headers = files(
'config.hh', 'config.hh',
'english.hh', 'english.hh',
'error.hh', 'error.hh',
'escape-char.hh',
'exit.hh', 'exit.hh',
'experimental-features.hh', 'experimental-features.hh',
'experimental-features-json.hh', 'experimental-features-json.hh',

View file

@ -3,7 +3,7 @@
#include "test-session.hh" #include "test-session.hh"
#include "util.hh" #include "util.hh"
#include "tests/debug-char.hh" #include "escape-char.hh"
namespace nix { namespace nix {
@ -60,7 +60,7 @@ std::ostream & operator<<(std::ostream & os, ReplOutputParser::State s)
void ReplOutputParser::transition(State new_state, char responsible_char, bool wasPrompt) void ReplOutputParser::transition(State new_state, char responsible_char, bool wasPrompt)
{ {
if constexpr (DEBUG_REPL_PARSER) { if constexpr (DEBUG_REPL_PARSER) {
std::cerr << "transition " << new_state << " for " << DebugChar{responsible_char} std::cerr << "transition " << new_state << " for " << MaybeHexEscapedChar{responsible_char}
<< (wasPrompt ? " [prompt]" : "") << "\n"; << (wasPrompt ? " [prompt]" : "") << "\n";
} }
state = new_state; state = new_state;
@ -118,7 +118,7 @@ bool TestSession::waitForPrompt()
}); });
if constexpr (DEBUG_REPL_PARSER) { if constexpr (DEBUG_REPL_PARSER) {
std::cerr << "raw " << DebugChar{buf[i]} << (wasEaten ? " [eaten]" : "") << "\n"; std::cerr << "raw " << MaybeHexEscapedChar{buf[i]} << (wasEaten ? " [eaten]" : "") << "\n";
} }
} }

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@ -1,6 +1,6 @@
#include "cli-literate-parser.hh" #include "cli-literate-parser.hh"
#include "libexpr/print.hh" #include "libexpr/print.hh"
#include "debug-char.hh" #include "escape-char.hh"
#include "types.hh" #include "types.hh"
#include "util.hh" #include "util.hh"
#include <ranges> #include <ranges>
@ -77,7 +77,7 @@ CLILiterateParser::CLILiterateParser(std::string prompt, size_t indent)
void CLILiterateParser::feed(char c) void CLILiterateParser::feed(char c)
{ {
if constexpr (DEBUG_PARSER) { if constexpr (DEBUG_PARSER) {
std::cout << stateDebug(state_) << " " << DebugChar{c} << "\n"; std::cout << stateDebug(state_) << " " << MaybeHexEscapedChar{c} << "\n";
} }
if (c == '\n') { if (c == '\n') {

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@ -1,24 +0,0 @@
///@file
#include <ostream>
#include <boost/io/ios_state.hpp>
namespace nix {
struct DebugChar
{
char c;
};
inline std::ostream & operator<<(std::ostream & s, DebugChar c)
{
boost::io::ios_flags_saver _ifs(s);
if (isprint(c.c)) {
s << static_cast<char>(c.c);
} else {
s << std::hex << "0x" << (static_cast<unsigned int>(c.c) & 0xff);
}
return s;
}
}

View file

@ -1,5 +1,5 @@
#include "terminal-code-eater.hh" #include "terminal-code-eater.hh"
#include "debug-char.hh" #include "escape-char.hh"
#include <assert.h> #include <assert.h>
#include <cstdint> #include <cstdint>
#include <iostream> #include <iostream>
@ -14,7 +14,7 @@ void TerminalCodeEater::feed(char c, std::function<void(char)> on_char)
auto isIntermediateChar = [](char v) -> bool { return v >= 0x20 && v <= 0x2f; }; auto isIntermediateChar = [](char v) -> bool { return v >= 0x20 && v <= 0x2f; };
auto isFinalChar = [](char v) -> bool { return v >= 0x40 && v <= 0x7e; }; auto isFinalChar = [](char v) -> bool { return v >= 0x40 && v <= 0x7e; };
if constexpr (DEBUG_EATER) { if constexpr (DEBUG_EATER) {
std::cerr << "eater" << DebugChar{c} << "\n"; std::cerr << "eater" << MaybeHexEscapedChar{c} << "\n";
} }
switch (state) { switch (state) {
@ -28,7 +28,7 @@ void TerminalCodeEater::feed(char c, std::function<void(char)> on_char)
return; return;
} }
if constexpr (DEBUG_EATER) { if constexpr (DEBUG_EATER) {
std::cerr << "eater uneat" << DebugChar{c} << "\n"; std::cerr << "eater uneat" << MaybeHexEscapedChar{c} << "\n";
} }
on_char(c); on_char(c);
break; break;