Please take a look at this program.
http://gayatri-hitech.com/languageclasses/editline-sample.c.html
I have also pasted the code here:
/*
cc -g test.c -o test -ledit -ltermcap
*/
#include <stdio.h>
#include <histedit.h>
/* To print out the prompt you need to use a function. This could be
made to do something special, but I opt to just have a static prompt.
*/
char * prompt(EditLine *e) {
return "test> ";
}
int main(int argc, char *argv[]) {
/* This holds all the state for our line editor */
EditLine *el;
/* This holds the info for our history */
History *myhistory;
/* Temp variables */
int count;
const char *line;
int keepreading = 1;
HistEvent ev;
/* Initialize the EditLine state to use our prompt function and
emacs style editing. */
el = el_init(argv[0], stdin, stdout, stderr);
el_set(el, EL_PROMPT, &prompt);
el_set(el, EL_EDITOR, "emacs");
/* Initialize the history */
myhistory = history_init();
if (myhistory == 0) {
fprintf(stderr, "history could not be initialized\n");
return 1;
}
/* Set the size of the history */
history(myhistory, &ev, H_SETSIZE, 800);
/* This sets up the call back functions for history functionality */
el_set(el, EL_HIST, history, myhistory);
while (keepreading) {
/* count is the number of characters read.
line is a const char* of our command line with the tailing
\n */
line = el_gets(el, &count);
/* In order to use our history we have to explicitly add
commands
to the history */
if (count > 0) {
history(myhistory, &ev, H_ENTER, line);
printf("You typed \"%s\"\n", line);
}
}
/* Clean up our memory */
history_end(myhistory);
el_end(el);
return 0;
}
Please compile this program and see what it does. Actually bash uses
readline and editline is a
BSD licensed BSD alternative to the bulky readline library.
The other day I googled and got this code. I ran it and was very happy
with the results.
So this is what you need to do to integrate history features into your
application.
I think the code is mostly self explanatory. ;)
That guy has commented the code very well.
By the way please look at this page:
http://gayatri-hitech.com/languageclasses/
It is evolving and not ready yet. But I shall put up all the code samples here.
Not the LUG mails. You only need the code right? ;)
I shall send better language tips from next week onwards.
Best,
Girish
--
Gayatri Hitech
web: http://gayatri-hitech.com
SpamCheetah Spam filter:
http://spam-cheetah.com
