lchat

A line oriented chat front end for ii.
git clone git://git.suckless.org/lchat
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commit 197736f5ab3283803a6ff9925ec9418decb746a1
parent 55128841b0b84282c27239d9b0ec920f0546a2d5
Author: Jan Klemkow <j.klemkow@wemelug.de>
Date:   Fri, 23 Oct 2015 23:09:48 +0200

add slackline stub

Diffstat:
slackline.c | 60++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
slackline.h | 23+++++++++++++++++++++++
2 files changed, 83 insertions(+), 0 deletions(-)

diff --git a/slackline.c b/slackline.c @@ -0,0 +1,60 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "slackline.h" + +struct slackline * +sl_init(void) +{ + struct slackline *sl = malloc(sizeof *sl); + + if (sl == NULL) + return NULL; + + sl->bufsize = BUFSIZ; + sl->buf = malloc(sl->bufsize); + sl->buf[0] = '\0'; + sl->len = 0; + sl->cur = 0; + + return sl; +} + +void +sl_free(struct slackline *sl) +{ + free(sl->buf); + free(sl); +} + +int +sl_keystroke(struct slackline *sl, int key) +{ + if (sl == NULL || sl->len < sl->cur) + return -1; + + /* add character to buffer */ + if (key >= 32 && key <= 127) { + if (sl->cur < sl->len) { + memmove(sl->buf + sl->cur + 1, sl->buf + sl->cur, + sl->len - sl->cur); + sl->buf[sl->cur++] = key; + } else { + sl->buf[sl->cur++] = key; + sl->buf[sl->cur] = '\0'; + } + + return 0; + } + + /* handle ctl keys */ + switch (key) { + case 8: /* backspace */ + sl->cur--; + sl->buf[sl->cur] = '\0'; + break; + } + + return 0; +} diff --git a/slackline.h b/slackline.h @@ -0,0 +1,23 @@ +#ifndef SLACKLIINE_H +#define SLACKLIINE_H + +/* + * +-+-+-+-+-+ + * |c|c|c|0|0| + * +-+-+-+-+-+ + * ^ ^ + * len bufsize + */ + +struct slackline { + char *buf; + size_t bufsize; + size_t len; + size_t cur; +}; + +struct slackline * sl_init(void); +void sl_free(struct slackline *); +int sl_keystroke(struct slackline *sl, int key); + +#endif