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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* Version: MPL 1.1 / GPLv3+ / LGPLv3+
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License or as specified alternatively below. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Major Contributor(s):
* Copyright (C) 2011 Red Hat, Inc., Stephan Bergmann <sbergman@redhat.com>
* (initial developer)
*
* All Rights Reserved.
*
* For minor contributions see the git repository.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 3 or later (the "GPLv3+"), or
* the GNU Lesser General Public License Version 3 or later (the "LGPLv3+"),
* in which case the provisions of the GPLv3+ or the LGPLv3+ are applicable
* instead of those above.
*/
#include "sal/config.h"
#include <cassert>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <sstream>
#include <stdio.h> // vsnprintf
#include "osl/thread.hxx"
#include "rtl/string.h"
#include "sal/detail/log.h"
#include "sal/log.hxx"
#include "sal/types.h"
#include "logformat.hxx"
#if defined WNT
#include <process.h>
#define OSL_DETAIL_GETPID _getpid()
#else
#include <unistd.h>
#define OSL_DETAIL_GETPID getpid()
#endif
// Avoid the use of other sal code in this file as much as possible, so that
// this code can be called from other sal code without causing endless
// recursion.
namespace {
bool equalStrings(
char const * string1, std::size_t length1, char const * string2,
std::size_t length2)
{
return length1 == length2 && std::memcmp(string1, string2, length1) == 0;
}
char const * toString(sal_detail_LogLevel level) {
switch (level) {
default:
assert(false); // this cannot happen
// fall through
case SAL_DETAIL_LOG_LEVEL_INFO:
return "info";
case SAL_DETAIL_LOG_LEVEL_WARN:
return "warn";
}
}
bool report(sal_detail_LogLevel level, char const * area) {
assert(area != 0);
char const * env = std::getenv("SAL_LOG");
if (env == 0) {
env = "+WARN";
}
std::size_t areaLen = std::strlen(area);
enum Sense { POSITIVE = 0, NEGATIVE = 1 };
std::size_t senseLen[2] = { 0, 1 };
// initial senseLen[POSITIVE] < senseLen[NEGATIVE], so that if there are
// no matching switches at all, the result will be negative (and
// initializing with 1 is safe as the length of a valid switch, even
// without the "+"/"-" prefix, will always be > 1)
for (char const * p = env;;) {
Sense sense;
switch (*p++) {
case '\0':
return senseLen[POSITIVE] >= senseLen[NEGATIVE];
// if a specific item is both postiive and negative
// (senseLen[POSITIVE] == senseLen[NEGATIVE]), default to
// positive
case '+':
sense = POSITIVE;
break;
case '-':
sense = NEGATIVE;
break;
default:
return true; // upon an illegal SAL_LOG value, enable everything
}
char const * p1 = p;
while (*p1 != '.' && *p1 != '+' && *p1 != '-' && *p1 != '\0') {
++p1;
}
bool match;
if (equalStrings(p, p1 - p, RTL_CONSTASCII_STRINGPARAM("INFO"))) {
match = level == SAL_DETAIL_LOG_LEVEL_INFO;
} else if (equalStrings(p, p1 - p, RTL_CONSTASCII_STRINGPARAM("WARN")))
{
match = level == SAL_DETAIL_LOG_LEVEL_WARN;
} else {
return true;
// upon an illegal SAL_LOG value, everything is considered
// positive
}
char const * p2 = p1;
while (*p2 != '+' && *p2 != '-' && *p2 != '\0') {
++p2;
}
if (match) {
if (*p1 == '.') {
++p1;
std::size_t n = p2 - p1;
if ((n == areaLen && equalStrings(p1, n, area, areaLen))
|| (n < areaLen && area[n] == '.'
&& equalStrings(p1, n, area, n)))
{
senseLen[sense] = p2 - p;
}
} else {
senseLen[sense] = p1 - p;
}
}
p = p2;
}
}
void log(
sal_detail_LogLevel level, char const * area, char const * where,
char const * message)
{
std::ostringstream s;
s << toString(level) << ':' << area << ':' << OSL_DETAIL_GETPID << ':'
<< osl::Thread::getCurrentIdentifier() << ':' << where << message
<< '\n';
std::fputs(s.str().c_str(), stderr);
}
}
void sal_detail_log(
sal_detail_LogLevel level, char const * area, char const * where,
char const * message)
{
if (report(level, area)) {
log(level, area, where, message);
}
}
void sal_detail_logFormat(
sal_detail_LogLevel level, char const * area, char const * where,
char const * format, ...)
{
if (report(level, area)) {
std::va_list args;
va_start(args, format);
osl::detail::logFormat(level, area, where, format, args);
va_end(args);
}
}
void osl::detail::logFormat(
sal_detail_LogLevel level, char const * area, char const * where,
char const * format, std::va_list arguments)
{
char buf[1024];
int const len = sizeof buf - RTL_CONSTASCII_LENGTH("...");
int n = vsnprintf(buf, len, format, arguments);
if (n < 0) {
std::strcpy(buf, "???");
} else if (n >= len) {
std::strcpy(buf + len - 1, "...");
}
log(level, area, where, buf);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
