1/*
2 * This file is part of the MicroPython project, http://micropython.org/
3 *
4 * The MIT License (MIT)
5 *
6 * Copyright (c) 2013, 2014 Damien P. George
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 * THE SOFTWARE.
25 */
26
27#include <errno.h>
28#include <stdio.h>
29#include <stdlib.h>
30#include <string.h>
31#include <fcntl.h>
32
33#include "py/mpstate.h"
34#include "py/mphal.h"
35#include "input.h"
36
37#if MICROPY_USE_READLINE == 1
38#include "lib/mp-readline/readline.h"
39#endif
40
41#if MICROPY_USE_READLINE == 0
42char *prompt(char *p) {
43 // simple read string
44 static char buf[256];
45 fputs(p, stdout);
46 char *s = fgets(buf, sizeof(buf), stdin);
47 if (!s) {
48 return NULL;
49 }
50 int l = strlen(buf);
51 if (buf[l - 1] == '\n') {
52 buf[l - 1] = 0;
53 } else {
54 l++;
55 }
56 char *line = malloc(l);
57 memcpy(line, buf, l);
58 return line;
59}
60#endif
61
62void prompt_read_history(void) {
63 #if MICROPY_USE_READLINE_HISTORY
64 #if MICROPY_USE_READLINE == 1
65 readline_init0(); // will clear history pointers
66 char *home = getenv("HOME");
67 if (home != NULL) {
68 vstr_t vstr;
69 vstr_init(&vstr, 50);
70 vstr_printf(&vstr, "%s/.micropython.history", home);
71 int fd = open(vstr_null_terminated_str(&vstr), O_RDONLY);
72 if (fd != -1) {
73 vstr_reset(&vstr);
74 for (;;) {
75 char c;
76 int sz = read(fd, &c, 1);
77 if (sz < 0) {
78 if (errno == EINTR) {
79 continue;
80 }
81 break;
82 }
83 if (sz == 0 || c == '\n') {
84 readline_push_history(vstr_null_terminated_str(&vstr));
85 if (sz == 0) {
86 break;
87 }
88 vstr_reset(&vstr);
89 } else {
90 vstr_add_byte(&vstr, c);
91 }
92 }
93 close(fd);
94 }
95 vstr_clear(&vstr);
96 }
97 #endif
98 #endif
99}
100
101void prompt_write_history(void) {
102 #if MICROPY_USE_READLINE_HISTORY
103 #if MICROPY_USE_READLINE == 1
104 char *home = getenv("HOME");
105 if (home != NULL) {
106 vstr_t vstr;
107 vstr_init(&vstr, 50);
108 vstr_printf(&vstr, "%s/.micropython.history", home);
109 int fd = open(vstr_null_terminated_str(&vstr), O_CREAT | O_TRUNC | O_WRONLY, 0644);
110 if (fd != -1) {
111 for (int i = MP_ARRAY_SIZE(MP_STATE_PORT(readline_hist)) - 1; i >= 0; i--) {
112 const char *line = MP_STATE_PORT(readline_hist)[i];
113 if (line != NULL) {
114 while (write(fd, line, strlen(line)) == -1 && errno == EINTR) {
115 }
116 while (write(fd, "\n", 1) == -1 && errno == EINTR) {
117 }
118 }
119 }
120 close(fd);
121 }
122 }
123 #endif
124 #endif
125}
126