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/* 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(string* content, string* err) {
char* p = &(*content)[0];
char* end = p + 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 yy4;
goto yy7;
} else {
if (yych <= ' ') goto yy4;
if (yych <= '*') goto yy7;
if (yych <= ':') goto yy6;
goto yy7;
}
} else {
if (yych <= '^') {
if (yych <= 'Z') goto yy6;
if (yych != '\\') goto yy7;
} else {
if (yych == '`') goto yy7;
if (yych <= 'z') goto yy6;
goto yy7;
}
}
++p;
if ((yych = *p) == '\n') goto yy13;
goto yy10;
yy3:
{
// 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;
}
yy4:
++p;
yych = *p;
goto yy12;
yy5:
{ continue; }
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 yy3;
yy11:
++p;
if (end <= p) break;
yych = *p;
yy12:
if (yybm[0+yych] & 128) {
goto yy11;
}
goto yy5;
yy13:
++p;
{ continue; }
}
}
return true;
}
|
