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/*

* This file is part of the Micro Python 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 <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 "lib/mp-readline/readline.h"

#elif MICROPY_USE_READLINE == 2

#include <readline/readline.h>

#include <readline/history.h>

#include <readline/tilde.h>

#endif

char *prompt(char *p) {

#if MICROPY_USE_READLINE == 1

// MicroPython supplied readline

vstr_t vstr;

vstr_init(&vstr, 16);

mp_hal_stdio_mode_raw();

int ret = readline(&vstr, p);

mp_hal_stdio_mode_orig();

if (ret != 0) {

vstr_clear(&vstr);

if (ret == CHAR_CTRL_D) {

// EOF

printf("\n");

return NULL;

} else {

printf("\n");

char *line = malloc(1);

line[0] = '\0';

return line;

}

}

vstr_null_terminated_str(&vstr);

char *line = malloc(vstr.len + 1);

memcpy(line, vstr.buf, vstr.len + 1);

vstr_clear(&vstr);

#elif MICROPY_USE_READLINE == 2

// GNU readline

char *line = readline(p);

if (line) {

add_history(line);

}

#else

// 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);

#endif

return line;

}

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) {

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);

}

#elif MICROPY_USE_READLINE == 2

read_history(tilde_expand("~/.micropython.history"));

#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) {

int res;

res = write(fd, line, strlen(line));

res = write(fd, "\n", 1);

(void)res;

}

}

close(fd);

}

}

#elif MICROPY_USE_READLINE == 2

write_history(tilde_expand("~/.micropython.history"));

#endif

#endif

}

STATIC mp_obj_t mp_builtin_input(size_t n_args, const mp_obj_t *args) {

if (n_args == 1) {

mp_obj_print(args[0], PRINT_STR);

}

char *line = prompt("");

if (line == NULL) {

nlr_raise(mp_obj_new_exception(&mp_type_EOFError));

}

mp_obj_t o = mp_obj_new_str(line, strlen(line), false);

free(line);

return o;

}

MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_input_obj, 0, 1, mp_builtin_input);