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#include "wvfdstream.h"
#include "wvistreamlist.h"
#include "wvstrutils.h"
#include "wvunixsocket.h"
#include <readline/readline.h>
#include <readline/history.h>
#ifndef MACOS // The version of READLINE shipped with MacOS is brain damaged.
class WvReadLineStream : public WvStream
{
static WvReadLineStream *me;
WvStream *base;
WvString prompt;
WvDynBuf line_buf;
WvStringList commands;
virtual size_t uread(void *_buf, size_t count)
{
size_t result = 0;
char *buf = (char *)_buf;
while (count > 0 && line_buf.used() > 0)
{
size_t chunk = line_buf.optgettable();
if (chunk > count)
chunk = count;
memcpy(buf, line_buf.get(chunk), chunk);
count -= chunk;
buf += chunk;
result += chunk;
}
return result;
}
virtual size_t uwrite(const void *_buf, size_t count)
{
const char *buf = (const char *)_buf;
for (size_t i=0; i<count; ++i)
{
if (buf[i] == '\n')
rl_crlf();
else
rl_show_char(buf[i]);
}
return count;
}
static void readline_callback(char *str)
{
if (str == NULL)
return;
size_t len = strlen(str);
if (len == 0)
return;
me->line_buf.put(str, len);
me->line_buf.putch('\n');
add_history(str);
}
static int readline_getc(FILE *)
{
char ch;
assert(me->base->read(&ch, 1) == 1);
return ch;
}
static char *readline_command_completion_function(const char *text, int state)
{
static int skip = 0;
if (state == 0)
skip = 0;
int my_skip = skip;
size_t len = strlen(text);
WvStringList::Iter i(me->commands);
for (i.rewind(); i.next(); )
{
if (my_skip-- > 0)
continue;
++skip;
if (i->len() >= len && strncmp(*i, text, len) == 0)
return strdup(*i);
}
return NULL;
}
virtual void pre_select(SelectInfo &si)
{
if (si.wants.readable && line_buf.used() > 0)
si.msec_timeout = 0;
base->pre_select(si);
}
virtual bool post_select(SelectInfo &si)
{
bool now = false;
if (si.wants.readable && line_buf.used() > 0)
now = true;
while (base->isreadable())
rl_callback_read_char();
return base->post_select(si) || now;
}
public:
WvReadLineStream(WvStream *_base, WvStringParm _prompt)
{
base = _base;
prompt = _prompt;
assert(!me);
me = this;
set_wsname("readline on %s", base->wsname());
rl_already_prompted = 1;
rl_completion_entry_function = readline_command_completion_function;
rl_callback_handler_install(prompt, readline_callback);
rl_getc_function = readline_getc;
}
~WvReadLineStream()
{
rl_getc_function = NULL;
rl_callback_handler_remove();
me = NULL;
}
virtual bool isok() const
{
return WvStream::isok() && base->isok();
}
void display_prompt()
{
base->print("%s", prompt);
rl_already_prompted = 1;
}
void set_commands(const WvStringList &_commands)
{
commands.zap();
WvStringList::Iter i(_commands);
for (i.rewind(); i.next(); )
commands.append(*i);
}
const char *wstype() const { return "WvReadLineStream"; }
};
WvReadLineStream *WvReadLineStream::me = NULL;
void remote_cb(WvStream &remote, WvReadLineStream &local)
{
const char *line = remote.getline();
if (line == NULL)
return;
WvStringList words;
wvtcl_decode(words, line);
WvString first = words.popstr();
bool last_line = !!first && first != "-";
if (last_line)
local.print("%s ", first);
local.print("%s\n", words.join(" "));
if (last_line)
local.display_prompt();
if (words.popstr() == "Commands availible:")
local.set_commands(words);
}
void local_cb(WvReadLineStream &local, WvStream &remote)
{
const char *line = local.getline();
if (line == NULL)
return;
if (strcmp(line, "quit") == 0)
remote.close();
remote.print("%s\n", line);
}
int main(int argc, char **argv)
{
WvReadLineStream readlinestream(wvcon, "> ");
const char *sockname = "/tmp/weaver.wsd";
if (argc >= 2)
sockname = argv[1];
WvUnixConn *s = new WvUnixConn(sockname);
if (!s->isok())
{
wverr->print("Failed to connect to %s: %s\n",
sockname, s->errstr());
return 1;
}
s->set_wsname("%s", sockname);
s->print("help\n");
s->setcallback(wv::bind(remote_cb, wv::ref(*s), wv::ref(readlinestream)));
WvIStreamList::globallist.append(s, true, "wvstreams debugger client");
readlinestream.setcallback(wv::bind(local_cb, wv::ref(readlinestream),
wv::ref(*s)));
WvIStreamList::globallist.append(&readlinestream, false,
"wvstreams debugger readline");
while (s->isok() && readlinestream.isok())
WvIStreamList::globallist.runonce();
return 0;
}
#endif // Apple brain damaged Readline.
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