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Move readline functionality into device-independent code

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This commit is contained in:
Josh Yelon
2021-10-12 12:46:11 -04:00
parent 315bf6e3b1
commit 995219d965
6 changed files with 122 additions and 42 deletions
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26
luprex/core/cpp/drivenengine.hpp
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@@ -123,6 +123,20 @@ public:
//
bool closed() const { return closed_; }
// True if the channel is in readline mode.
//
// Stdio always starts with this enabled, other channels always start
// with this disabled.
//
bool readline_enabled() const { return readline_enabled_; }
// Put the channel into readline mode.
//
// Caution: the channel better be coming from a raw tty, otherwise,
// this is going to produce weird results.
//
void set_readline(bool enabled);
// You may delete any channel except for stdio. This closes
// the channel.
//
@@ -134,7 +148,13 @@ private:
//
Channel(DrivenEngine *de, int chid, int port, const std::string &target);
int readline_space() { return READLINE_MAX - readline_len_; }
int echo_space() { return READLINE_MAX - echo_len_; }
void feed_readline(int nbytes, const char *bytes);
private:
static const int READLINE_MAX=512;
DrivenEngine *driven_;
int chid_;
std::unique_ptr<StreamBuffer> sb_in_;
@@ -142,6 +162,12 @@ private:
int port_;
bool closed_;
std::string target_;
char readline_buf_[READLINE_MAX];
int readline_len_;
char readline_lastc_;
char echo_buf_[READLINE_MAX];
int echo_len_;
bool readline_enabled_;
friend class DrivenEngine;
};
using UniqueChannel = std::unique_ptr<Channel>;