circuitpython/ports/unix/input.c

126 lines
3.8 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include "py/mpstate.h"
#include "py/mphal.h"
#include "input.h"
#if MICROPY_USE_READLINE == 1
#include "shared/readline/readline.h"
#endif
#if MICROPY_USE_READLINE == 0
char *prompt(char *p) {
// simple read string
static char buf[256];
fputs(p, stdout);
char *s = fgets(buf, sizeof(buf), stdin);
if (!s) {
return NULL;
}
int l = strlen(buf);
if (buf[l - 1] == '\n') {
buf[l - 1] = 0;
} else {
l++;
}
char *line = malloc(l);
memcpy(line, buf, l);
return line;
}
#endif
void prompt_read_history(void) {
#if MICROPY_USE_READLINE_HISTORY
#if MICROPY_USE_READLINE == 1
readline_init0(); // will clear history pointers
char *home = getenv("HOME");
if (home != NULL) {
vstr_t vstr;
vstr_init(&vstr, 50);
vstr_printf(&vstr, "%s/.micropython.history", home);
int fd = open(vstr_null_terminated_str(&vstr), O_RDONLY);
if (fd != -1) {
vstr_reset(&vstr);
for (;;) {
char c;
int sz = read(fd, &c, 1);
if (sz < 0) {
if (errno == EINTR) {
continue;
}
break;
}
if (sz == 0 || c == '\n') {
readline_push_history(vstr_null_terminated_str(&vstr));
if (sz == 0) {
break;
}
vstr_reset(&vstr);
} else {
vstr_add_byte(&vstr, c);
}
}
close(fd);
}
vstr_clear(&vstr);
}
#endif
#endif
}
void prompt_write_history(void) {
#if MICROPY_USE_READLINE_HISTORY
#if MICROPY_USE_READLINE == 1
char *home = getenv("HOME");
if (home != NULL) {
vstr_t vstr;
vstr_init(&vstr, 50);
vstr_printf(&vstr, "%s/.micropython.history", home);
int fd = open(vstr_null_terminated_str(&vstr), O_CREAT | O_TRUNC | O_WRONLY, 0644);
if (fd != -1) {
for (int i = MP_ARRAY_SIZE(MP_STATE_PORT(readline_hist)) - 1; i >= 0; i--) {
const char *line = MP_STATE_PORT(readline_hist)[i];
if (line != NULL) {
while (write(fd, line, strlen(line)) == -1 && errno == EINTR) {
}
while (write(fd, "\n", 1) == -1 && errno == EINTR) {
}
}
}
close(fd);
}
}
#endif
#endif
}