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
|
#ifndef _BUF_H
#define _BUF_H
/* $OpenPackages$ */
/* $OpenBSD: buf.h,v 1.16 2003/06/03 02:56:11 millert Exp $ */
/* $NetBSD: buf.h,v 1.7 1996/12/31 17:53:22 christos Exp $ */
/*
* Copyright (c) 1999 Marc Espie.
*
* Extensive code changes for the OpenBSD project.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT 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 OPENBSD
* PROJECT 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.
*/
/*
* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
* Copyright (c) 1988, 1989 by Adam de Boor
* Copyright (c) 1989 by Berkeley Softworks
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* 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 of the University 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 REGENTS 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 REGENTS 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.
*
* from: @(#)buf.h 8.1 (Berkeley) 6/6/93
*/
/*
* buf
* Support for extensible char buffers.
* One adds chars to a buffer, then retrieves the contents using
* Buf_Retrieve (no copy involved), or releases the memory using
* Buf_Destroy.
*/
/* Internal data structures and functions. BUFFER is visible so
* that users can allocate the memory themselves. */
typedef struct Buffer_ {
char *buffer; /* The buffer itself. */
char *inPtr; /* Place to write to. */
char *endPtr; /* End of allocated space. */
} BUFFER;
/* Internal support for Buf_AddChar. */
extern void BufOverflow(Buffer);
/* User interface */
/* Buf_AddChars(buf, n, str);
* Adds n chars to buffer buf starting from str. */
extern void Buf_AddChars(Buffer, size_t, const char *);
/* Buf_Reset(buf);
* Empties buffer. */
#define Buf_Reset(bp) ((void)((bp)->inPtr = (bp)->buffer))
/* n = Buf_Size(buf);
* Returns number of chars currently in buf.
* Doesn't include the null-terminating char. */
#define Buf_Size(bp) ((size_t)((bp)->inPtr - (bp)->buffer))
/* Buf_Init(buf, init);
* Initializes a buffer, to hold approximately init chars.
* Set init to 0 if you have no idea. */
extern void Buf_Init(Buffer, size_t);
/* Buf_Destroy(buf);
* Nukes a buffer and all its resources. */
#define Buf_Destroy(bp) ((void)free((bp)->buffer))
/* str = Buf_Retrieve(buf);
* Retrieves data from a buffer, as a NULL terminated string. */
#define Buf_Retrieve(bp) (*(bp)->inPtr = '\0', (bp)->buffer)
/* Buf_AddChar(buf, c);
* Adds a single char to buffer. */
#define Buf_AddChar(bp, byte) \
do { \
if ((bp)->endPtr - (bp)->inPtr <= 1) \
BufOverflow(bp); \
*(bp)->inPtr++ = (byte); \
} while (0)
/* Buf_AddSpace(buf);
* Adds a space to buffer. */
#define Buf_AddSpace(b) Buf_AddChar((b), ' ')
/* Buf_AddString(buf, str);
* Adds the contents of a NULL terminated string to buffer. */
#define Buf_AddString(b, s) Buf_AddChars((b), strlen(s), (s))
/* Buf_Addi(buf, s, e);
* Adds characters between s and e to buffer. */
#define Buf_Addi(b, s, e) Buf_AddChars((b), (e) - (s), (s))
/* Buf_KillTrailingSpaces(buf);
* Removes non-backslashed spaces at the end of a buffer. */
extern void Buf_KillTrailingSpaces(Buffer);
#endif /* _BUF_H */
|
