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#define _POSIX_C_SOURCE 200809L
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "shed.h"
/*
* BIG FAT TODO: DEAL WITH MULTIBYTE CHARACTERS CORRECTLY
*/
struct shed *shed(struct shed *e)
{
if (e == NULL) {
e = calloc(1, sizeof(*e));
if (e == NULL) {
return NULL;
}
}
/* TODO: head/tail/history */
if (e->cur == NULL) {
e->cur = calloc(1, sizeof(*e->cur));
if (e->cur == NULL) {
/* FIXME */
return e;
}
e->handle = shed_handle_non_vi;
e->head = e->cur;
e->tail = e->cur;
} else {
/* TODO: skip if the last input was blank */
e->tail->next = calloc(1, sizeof(*e->cur));
if (e->tail->next == NULL) {
/* FIXME */
return e;
}
e->tail->next->prev = e->tail;
e->tail = e->tail->next;
e->cur = e->tail;
}
struct termios original_tio;
if (tcgetattr(STDIN_FILENO, &original_tio) != 0) {
e->cur = NULL;
return e;
}
struct termios tio = original_tio;
tio.c_iflag &= ~BRKINT;
tio.c_lflag &= ~ECHO;
tio.c_lflag &= ~IEXTEN;
tio.c_lflag &= ~ICANON;
tio.c_lflag &= ~ISIG;
tcsetattr(STDIN_FILENO, TCSADRAIN, &tio);
if (e->prompt == NULL) {
e->prompt = getenv("PS1");
if (e->prompt == NULL) {
e->prompt = "$ ";
}
}
write(STDOUT_FILENO, e->prompt, strlen(e->prompt));
char c;
do {
if (read(STDIN_FILENO, &c, 1) == -1) {
//b.nread = -1;
/* TODO: signal failure */
break;
}
} while (e->handle(e, &tio, c));
/* TODO: make sure this doesn't overflow */
e->cur->buf[e->cur->nread] = '\0';
tcsetattr(STDIN_FILENO, TCSADRAIN, &original_tio);
return e;
}
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