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
|
/* Generated by re2c 0.13.5 */
// Copyright 2011 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "depfile_parser.h"
// A note on backslashes in Makefiles, from reading the docs:
// Backslash-newline is the line continuation character.
// Backslash-# escapes a # (otherwise meaningful as a comment start).
// Backslash-% escapes a % (otherwise meaningful as a special).
// Finally, quoting the GNU manual, "Backslashes that are not in danger
// of quoting ‘%’ characters go unmolested."
// How do you end a line with a backslash? The netbsd Make docs suggest
// reading the result of a shell command echoing a backslash!
//
// Rather than implement the above, we do the simpler thing here.
// If anyone actually has depfiles that rely on the more complicated
// behavior we can adjust this.
bool DepfileParser::Parse(const string& content, string* err) {
const char* p = content.data();
const char* end = content.data() + content.size();
for (;;) {
const char* start = p;
char yych;
{
static const unsigned char yybm[] = {
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 128, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
128, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 0, 0, 0, 0, 0,
0, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 0, 64, 0, 0, 64,
0, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
};
if ((end - p) < 2) break;
yych = *p;
if (yych <= '@') {
if (yych <= 0x1F) {
if (yych == '\n') goto yy5;
goto yy7;
} else {
if (yych <= ' ') goto yy5;
if (yych <= '*') goto yy7;
if (yych <= ':') goto yy6;
goto yy7;
}
} else {
if (yych <= '^') {
if (yych <= 'Z') goto yy6;
if (yych == '\\') goto yy3;
goto yy7;
} else {
if (yych == '`') goto yy7;
if (yych <= 'z') goto yy6;
goto yy7;
}
}
yy2:
{ continue; }
yy3:
++p;
if ((yych = *p) == '\n') goto yy13;
goto yy10;
yy4:
{
// Got a filename.
int len = p - start;;
if (start[len - 1] == ':')
len--; // Strip off trailing colon, if any.
if (len == 0)
continue; // Drop isolated colons.
if (!out_.str_) {
out_ = StringPiece(start, len);
} else {
ins_.push_back(StringPiece(start, len));
}
continue;
}
yy5:
yych = *++p;
goto yy12;
yy6:
yych = *++p;
goto yy10;
yy7:
++p;
{
*err = "BUG: depfile lexer encountered unknown state";
return false;
}
yy9:
++p;
if (end <= p) break;
yych = *p;
yy10:
if (yybm[0+yych] & 64) {
goto yy9;
}
goto yy4;
yy11:
++p;
if (end <= p) break;
yych = *p;
yy12:
if (yybm[0+yych] & 128) {
goto yy11;
}
goto yy2;
yy13:
++p;
{ continue; }
}
}
return true;
}
|