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1 | /*************************************************************************** |
2 | * Copyright (C) 2006 by Massimiliano Torromeo * |
3 | * massimiliano.torromeo@gmail.com * |
4 | * * |
5 | * This program is free software; you can redistribute it and/or modify * |
6 | * it under the terms of the GNU General Public License as published by * |
7 | * the Free Software Foundation; either version 2 of the License, or * |
8 | * (at your option) any later version. * |
9 | * * |
10 | * This program is distributed in the hope that it will be useful, * |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
13 | * GNU General Public License for more details. * |
14 | * * |
15 | * You should have received a copy of the GNU General Public License * |
16 | * along with this program; if not, write to the * |
17 | * Free Software Foundation, Inc., * |
18 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * |
19 | ***************************************************************************/ |
20 | |
21 | #include "utilities.h" |
22 | |
23 | #include "debug.h" |
24 | |
25 | #include <SDL.h> |
26 | #include <algorithm> |
27 | |
28 | //for browsing the filesystem |
29 | #include <sys/stat.h> |
30 | #include <sys/types.h> |
31 | #include <fcntl.h> |
32 | #include <dirent.h> |
33 | #include <fstream> |
34 | #include <iostream> |
35 | #include <sstream> |
36 | #include <strings.h> |
37 | #include <unistd.h> |
38 | |
39 | using namespace std; |
40 | |
41 | bool case_less::operator()(const string &left, const string &right) const { |
42 | return strcasecmp(left.c_str(), right.c_str()) < 0; |
43 | } |
44 | |
45 | string trim(const string& s) { |
46 | auto b = s.find_first_not_of(" \t\r"); |
47 | auto e = s.find_last_not_of(" \t\r"); |
48 | return b == string::npos ? "" : string(s, b, e + 1 - b); |
49 | } |
50 | |
51 | string ltrim(const string& s) { |
52 | auto b = s.find_first_not_of(" \t\r"); |
53 | return b == string::npos ? "" : string(s, b); |
54 | } |
55 | |
56 | string rtrim(const string& s) { |
57 | auto e = s.find_last_not_of(" \t\r"); |
58 | return e == string::npos ? "" : string(s, 0, e + 1); |
59 | } |
60 | |
61 | // See this article for a performance comparison of different approaches: |
62 | // http://insanecoding.blogspot.com/2011/11/how-to-read-in-file-in-c.html |
63 | string readFileAsString(string const& filename) { |
64 | ifstream in(filename, ios::in | ios::binary); |
65 | if (!in) { |
66 | return "<error opening " + string(filename) + ">"; |
67 | } |
68 | |
69 | // Get file size. |
70 | in.seekg(0, ios::end); |
71 | auto size = max(int(in.tellg()), 0); // tellg() returns -1 on errors |
72 | in.seekg(0, ios::beg); |
73 | |
74 | string contents(size, '\0'); |
75 | in.read(&contents[0], contents.size()); |
76 | in.close(); |
77 | |
78 | if (in.fail()) { |
79 | return "<error reading " + string(filename) + ">"; |
80 | } else { |
81 | contents.shrink_to_fit(); |
82 | return contents; |
83 | } |
84 | } |
85 | |
86 | constexpr int writeOpenFlags = |
87 | #ifdef O_CLOEXEC |
88 | O_CLOEXEC | // Linux |
89 | #endif |
90 | O_CREAT | O_WRONLY | O_TRUNC; |
91 | |
92 | // Use C functions since STL doesn't seem to have any way of applying fsync(). |
93 | bool writeStringToFile(string const& filename, string const& data) { |
94 | // Open temporary file. |
95 | string tempname = filename + '~'; |
96 | int fd = open(tempname.c_str(), writeOpenFlags, S_IRUSR | S_IWUSR); |
97 | if (fd < 0) { |
98 | return false; |
99 | } |
100 | |
101 | // Write temporary file. |
102 | const char *bytes = data.c_str(); |
103 | size_t remaining = data.size(); |
104 | bool ok = true; |
105 | while (remaining != 0) { |
106 | ssize_t written = write(fd, bytes, remaining); |
107 | if (written <= 0) { |
108 | ok = false; |
109 | break; |
110 | } else { |
111 | bytes += written; |
112 | remaining -= written; |
113 | } |
114 | } |
115 | if (ok) { |
116 | ok = fsync(fd) == 0; |
117 | } |
118 | |
119 | // Close temporary file. |
120 | ok &= close(fd) == 0; |
121 | |
122 | // Replace actual output file with temporary file. |
123 | if (ok) { |
124 | ok = rename(tempname.c_str(), filename.c_str()) == 0; |
125 | } |
126 | |
127 | return ok; |
128 | } |
129 | |
130 | constexpr int dirOpenFlags = |
131 | #ifdef O_DIRECTORY |
132 | O_DIRECTORY | // Linux |
133 | #endif |
134 | #ifdef O_CLOEXEC |
135 | O_CLOEXEC | // Linux |
136 | #endif |
137 | O_RDONLY; |
138 | |
139 | bool syncDir(string const& dirname) |
140 | { |
141 | int fd = open(dirname.c_str(), dirOpenFlags); |
142 | if (fd < 0) { |
143 | return false; |
144 | } |
145 | |
146 | bool ok = fsync(fd) == 0; |
147 | |
148 | ok &= close(fd) == 0; |
149 | |
150 | return ok; |
151 | } |
152 | |
153 | string parentDir(string const& dir) { |
154 | // Note that size() is unsigned, so for short strings the '- 2' wraps |
155 | // around and as a result the entire string is searched, which is fine. |
156 | auto p = dir.rfind('/', dir.size() - 2); |
157 | return p == string::npos ? "/" : dir.substr(0, p + 1); |
158 | } |
159 | |
160 | bool fileExists(const string &file) { |
161 | return access(file.c_str(), F_OK) == 0; |
162 | } |
163 | |
164 | string uniquePath(string const& dir, string const& name) |
165 | { |
166 | string path = dir + "/" + name; |
167 | unsigned int x = 2; |
168 | while (fileExists(path)) { |
169 | stringstream ss; |
170 | ss << dir << '/' << name << x; |
171 | ss >> path; |
172 | x++; |
173 | } |
174 | return path; |
175 | } |
176 | |
177 | int constrain(int x, int imin, int imax) { |
178 | return min(imax, max(imin, x)); |
179 | } |
180 | |
181 | //Configuration parsing utilities |
182 | int evalIntConf (ConfIntHash& hash, const std::string &key, int def, int imin, int imax) { |
183 | auto it = hash.find(key); |
184 | if (it == hash.end()) { |
185 | return hash[key] = def; |
186 | } else { |
187 | return it->second = constrain(it->second, imin, imax); |
188 | } |
189 | } |
190 | |
191 | void split(vector<string>& vec, string const& str, string const& delim) { |
192 | vec.clear(); |
193 | |
194 | if (delim.empty()) { |
195 | vec.push_back(str); |
196 | return; |
197 | } |
198 | |
199 | string::size_type i = 0, j; |
200 | while ((j = str.find(delim, i)) != string::npos) { |
201 | vec.push_back(str.substr(i, j - i)); |
202 | i = j + delim.size(); |
203 | } |
204 | vec.push_back(str.substr(i)); |
205 | } |
206 | |
207 | string strreplace (string orig, const string &search, const string &replace) { |
208 | string::size_type pos = orig.find( search, 0 ); |
209 | while (pos != string::npos) { |
210 | orig.replace(pos,search.length(),replace); |
211 | pos = orig.find( search, pos+replace.length() ); |
212 | } |
213 | return orig; |
214 | } |
215 | |
216 | string cmdclean (string cmdline) { |
217 | string spchars = "\\`$();|{}&'\"*?<>[]!^~-#\n\r "; |
218 | for (uint i=0; i<spchars.length(); i++) { |
219 | string curchar = spchars.substr(i,1); |
220 | cmdline = strreplace(cmdline, curchar, "\\"+curchar); |
221 | } |
222 | return cmdline; |
223 | } |
224 | |
225 | int intTransition(int from, int to, long tickStart, long duration, long tickNow) { |
226 | if (tickNow<0) tickNow = SDL_GetTicks(); |
227 | return constrain(((tickNow-tickStart) * (to-from)) / duration, from, to); |
228 | // elapsed increments |
229 | } |
230 | |
231 | void inject_user_event(enum EventCode code, void *data1, void *data2) |
232 | { |
233 | SDL_UserEvent e = { |
234 | .type = SDL_USEREVENT, |
235 | .code = code, |
236 | .data1 = data1, |
237 | .data2 = data2, |
238 | }; |
239 | |
240 | /* Inject an user event, that will be handled as a "repaint" |
241 | * event by the InputManager */ |
242 | SDL_PushEvent((SDL_Event *) &e); |
243 | DEBUG("Injecting event code %i\n", e.code); |
244 | } |
245 |
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