1/* Copyright (c) 2010-2011, Google Inc.
2 * All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Neither the name of Google Inc. nor the names of its
11 * contributors may be used to endorse or promote products derived from
12 * this software without specific prior written permission.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
15 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "common_util.h"
28
29bool StringMatch(const string& wildcard, const string& text) {
30  const char* c_text = text.c_str();
31  const char* c_wildcard = wildcard.c_str();
32  // Start of the current look-ahead. Everything before these positions is a
33  // definite, optimal match.
34  const char* c_text_last = NULL;
35  const char* c_wildcard_last = NULL;
36
37  char last_wc_char = wildcard[wildcard.size() - 1];
38
39  if (last_wc_char == '*' && wildcard.size() == 1) {
40    return true;  // '*' matches everything.
41  }
42
43  if (last_wc_char != '*' && last_wc_char != '?'
44      && last_wc_char != text[text.size() - 1]) {
45    // short cut for the case when the wildcard does not end with '*' or '?'
46    // and the last characters of wildcard and text do not match.
47    return false;
48  }
49
50  while (*c_text) {
51    if (*c_wildcard == '*') {
52      while (*++c_wildcard == '*') {
53        // Skip all '*'.
54      }
55      if (!*c_wildcard) {
56        // Ends with a series of '*'.
57        return true;
58      }
59      c_text_last = c_text;
60      c_wildcard_last = c_wildcard;
61    } else if ((*c_text == *c_wildcard) || (*c_wildcard == '?')) {
62      ++c_text;
63      ++c_wildcard;
64    } else if (c_text_last) {
65      // No match. But we have seen at least one '*', so rollback and try at the
66      // next position.
67      c_wildcard = c_wildcard_last;
68      c_text = c_text_last++;
69    } else {
70      return false;
71    }
72  }
73
74  // Skip all '*' at the end of the wildcard.
75  while (*c_wildcard == '*') {
76    ++c_wildcard;
77  }
78
79  return !*c_wildcard;
80}
81
82string ConvertToPlatformIndependentPath(const string &s) {
83  string ret = s;
84#ifdef _MSC_VER
85  // TODO(timurrrr): do we need anything apart from s/\\///g?
86  size_t it = 0;
87  while ((it = ret.find("\\", it)) != string::npos) {
88    ret.replace(it, 1, "/");
89  }
90#endif // _MSC_VER
91  return ret;
92}
93
94TS_FILE OpenFileReadOnly(const string &file_name, bool die_if_failed) {
95  TS_FILE ret = TS_FILE_INVALID;
96#ifdef TS_VALGRIND
97  SysRes sres = VG_(open)((const Char*)file_name.c_str(), VKI_O_RDONLY, 0);
98  if (!sr_isError(sres))
99    ret = sr_Res(sres);
100#elif defined(_MSC_VER)
101  ret = fopen(file_name.c_str(), "r");
102#else // no TS_VALGRIND
103  ret = open(file_name.c_str(), O_RDONLY);
104#endif
105  if (ret == TS_FILE_INVALID && die_if_failed) {
106    Printf("ERROR: can not open file %s\n", file_name.c_str());
107    exit(1);
108  }
109  return ret;
110}
111
112// Read the contents of a file to string. Valgrind version.
113string ReadFileToString(const string &file_name, bool die_if_failed) {
114  TS_FILE fd = OpenFileReadOnly(file_name, die_if_failed);
115  if (fd == TS_FILE_INVALID) {
116    return string();
117  }
118  char buff[257] = {0};
119  int n_read;
120  string res;
121  while ((n_read = read(fd, buff, sizeof(buff) - 1)) > 0) {
122    buff[n_read] = 0;
123    res.append(buff, n_read);
124  }
125  close(fd);
126  return res;
127}
128