1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/****************************************************************************
* apps/system/readline/std_readline.c
*
* Copyright (C) 2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <nuttx/arch.h>
#include <apps/readline.h>
#include "readline.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Type Declarations
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int readline_getc(FAR struct rl_common_s *vtbl);
static void readline_putc(FAR struct rl_common_s *vtbl, int ch);
static void readline_write(FAR struct rl_common_s *vtbl,
FAR const char *buffer, size_t buflen);
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static const struct rl_common_s g_stdreadline =
{
readline_getc
#ifdef CONFIG_READLINE_ECHO
, readline_putc
, readline_write
#endif
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: readline_getc
****************************************************************************/
static int readline_getc(FAR struct rl_common_s *vtbl)
{
return up_getc();
}
/****************************************************************************
* Name: readline_putc
****************************************************************************/
#ifdef CONFIG_READLINE_ECHO
static void readline_putc(FAR struct rl_common_s *vtbl, int ch)
{
up_putc(ch);
}
#endif
/****************************************************************************
* Name: readline_write
****************************************************************************/
#ifdef CONFIG_READLINE_ECHO
static void readline_write(FAR struct rl_common_s *vtbl,
FAR const char *buffer, size_t buflen)
{
for (; buflen > 0; buflen--)
{
up_putc(*buffer++);
}
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: std_readline
*
* readline() reads in at most one less than 'buflen' characters from
* 'stdin' and stores them into the buffer pointed to by 'buf'.
* Characters are echoed on 'stdout'. Reading stops after an EOF or a
* newline. If a newline is read, it is stored into the buffer. A null
* terminator is stored after the last character in the buffer.
*
* This version of realine assumes that we are reading and writing to
* a VT100 console. This will not work well if 'stdin' or 'stdout'
* corresponds to a raw byte steam.
*
* This function is inspired by the GNU readline but is an entirely
* different creature.
*
* Input Parameters:
* buf - The user allocated buffer to be filled.
* buflen - the size of the buffer.
*
* Returned values:
* On success, the (positive) number of bytes transferred is returned.
* EOF is returned to indicate either an end of file condition or a
* failure.
*
**************************************************************************/
ssize_t std_readline(FAR char *buf, int buflen)
{
return readline_common((FAR struct rl_common_s *)&g_stdreadline,
buf, buflen);
}
|
