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
|
/* $Id: strprintf2.cpp $ */
/** @file
* IPRT - String Formatters, alternative.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/string.h>
#include "internal/iprt.h"
#include <iprt/assert.h>
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
/** rtStrPrintf2Output() argument structure. */
typedef struct STRPRINTF2OUTPUTARGS
{
/** Pointer to current buffer position. */
char *pszCur;
/** Number of bytes left in the buffer (including the trailing zero). */
size_t cbLeft;
/** Set if we overflowed. */
bool fOverflowed;
} STRPRINTF2OUTPUTARGS;
/** Pointer to a rtStrPrintf2Output() argument structure. */
typedef STRPRINTF2OUTPUTARGS *PSTRPRINTF2OUTPUTARGS;
/**
* Output callback.
*
* @returns cbChars
*
* @param pvArg Pointer to a STRBUFARG structure.
* @param pachChars Pointer to an array of utf-8 characters.
* @param cbChars Number of bytes in the character array pointed to by pachChars.
*/
static DECLCALLBACK(size_t) rtStrPrintf2Output(void *pvArg, const char *pachChars, size_t cbChars)
{
PSTRPRINTF2OUTPUTARGS pArgs = (PSTRPRINTF2OUTPUTARGS)pvArg;
char *pszCur = pArgs->pszCur; /* We actually have to spell this out for VS2010, or it will load it for each case. */
if (cbChars < pArgs->cbLeft)
{
pArgs->cbLeft -= cbChars;
/* Note! For VS2010/64 we need at least 7 case statements before it generates a jump table. */
switch (cbChars)
{
default:
memcpy(pszCur, pachChars, cbChars);
break;
case 8: pszCur[7] = pachChars[7]; RT_FALL_THRU();
case 7: pszCur[6] = pachChars[6]; RT_FALL_THRU();
case 6: pszCur[5] = pachChars[5]; RT_FALL_THRU();
case 5: pszCur[4] = pachChars[4]; RT_FALL_THRU();
case 4: pszCur[3] = pachChars[3]; RT_FALL_THRU();
case 3: pszCur[2] = pachChars[2]; RT_FALL_THRU();
case 2: pszCur[1] = pachChars[1]; RT_FALL_THRU();
case 1: pszCur[0] = pachChars[0]; RT_FALL_THRU();
case 0:
break;
}
pArgs->pszCur = pszCur += cbChars;
*pszCur = '\0';
}
else
{
size_t cbLeft = pArgs->cbLeft;
if (cbLeft-- > 1)
{
memcpy(pszCur, pachChars, cbLeft);
pArgs->pszCur = pszCur += cbLeft;
*pszCur = '\0';
pArgs->cbLeft = 1;
}
pArgs->fOverflowed = true;
}
return cbChars;
}
RTDECL(ssize_t) RTStrPrintf2V(char *pszBuffer, size_t cchBuffer, const char *pszFormat, va_list args)
{
STRPRINTF2OUTPUTARGS Args;
size_t cchRet;
AssertMsg(cchBuffer > 0, ("Excellent idea! Format a string with no space for the output!\n"));
Args.pszCur = pszBuffer;
Args.cbLeft = cchBuffer;
Args.fOverflowed = false;
cchRet = RTStrFormatV(rtStrPrintf2Output, &Args, NULL, NULL, pszFormat, args);
return !Args.fOverflowed ? (ssize_t)cchRet : -(ssize_t)cchRet - 1;
}
RT_EXPORT_SYMBOL(RTStrPrintf2V);
RTDECL(ssize_t) RTStrPrintf2ExV(PFNSTRFORMAT pfnFormat, void *pvArg, char *pszBuffer, size_t cchBuffer,
const char *pszFormat, va_list args)
{
STRPRINTF2OUTPUTARGS Args;
size_t cchRet;
AssertMsg(cchBuffer > 0, ("Excellent idea! Format a string with no space for the output!\n"));
Args.pszCur = pszBuffer;
Args.cbLeft = cchBuffer;
Args.fOverflowed = false;
cchRet = RTStrFormatV(rtStrPrintf2Output, &Args, pfnFormat, pvArg, pszFormat, args);
return !Args.fOverflowed ? (ssize_t)cchRet : -(ssize_t)cchRet - 1;
}
RT_EXPORT_SYMBOL(RTStrPrintf2ExV);
|
