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1// Copyright (C) 2002-2012 Nikolaus Gebhardt
2// This file is part of the "Irrlicht Engine".
3// For conditions of distribution and use, see copyright notice in irrlicht.h
4
5#ifndef __IRR_CORE_UTIL_H_INCLUDED__
6#define __IRR_CORE_UTIL_H_INCLUDED__
7
8#include "irrString.h"
9#include "path.h"
10
11namespace irr
12{
13namespace core
14{
15
16/*! \file coreutil.h
17 \brief File containing useful basic utility functions
18*/
19
20// ----------- some basic quite often used string functions -----------------
21
22//! search if a filename has a proper extension
23inline s32 isFileExtension ( const io::path& filename,
24 const io::path& ext0,
25 const io::path& ext1,
26 const io::path& ext2)
27{
28 s32 extPos = filename.findLast ( '.' );
29 if ( extPos < 0 )
30 return 0;
31
32 extPos += 1;
33 if ( filename.equals_substring_ignore_case ( ext0, extPos ) ) return 1;
34 if ( filename.equals_substring_ignore_case ( ext1, extPos ) ) return 2;
35 if ( filename.equals_substring_ignore_case ( ext2, extPos ) ) return 3;
36 return 0;
37}
38
39//! search if a filename has a proper extension
40inline bool hasFileExtension ( const io::path& filename,
41 const io::path& ext0,
42 const io::path& ext1 = "",
43 const io::path& ext2 = "")
44{
45 return isFileExtension ( filename, ext0, ext1, ext2 ) > 0;
46}
47
48//! cut the filename extension from a source file path and store it in a dest file path
49inline io::path& cutFilenameExtension ( io::path &dest, const io::path &source )
50{
51 s32 endPos = source.findLast ( '.' );
52 dest = source.subString ( 0, endPos < 0 ? source.size () : endPos );
53 return dest;
54}
55
56//! get the filename extension from a file path
57inline io::path& getFileNameExtension ( io::path &dest, const io::path &source )
58{
59 s32 endPos = source.findLast ( '.' );
60 if ( endPos < 0 )
61 dest = "";
62 else
63 dest = source.subString ( endPos, source.size () );
64 return dest;
65}
66
67//! delete path from filename
68inline io::path& deletePathFromFilename(io::path& filename)
69{
70 // delete path from filename
71 const fschar_t* s = filename.c_str();
72 const fschar_t* p = s + filename.size();
73
74 // search for path separator or beginning
75 while ( *p != '/' && *p != '\\' && p != s )
76 p--;
77
78 if ( p != s )
79 {
80 ++p;
81 filename = p;
82 }
83 return filename;
84}
85
86//! trim paths
87inline io::path& deletePathFromPath(io::path& filename, s32 pathCount)
88{
89 // delete path from filename
90 s32 i = filename.size();
91
92 // search for path separator or beginning
93 while ( i>=0 )
94 {
95 if ( filename[i] == '/' || filename[i] == '\\' )
96 {
97 if ( --pathCount <= 0 )
98 break;
99 }
100 --i;
101 }
102
103 if ( i>0 )
104 {
105 filename [ i + 1 ] = 0;
106 filename.validate();
107 }
108 else
109 filename="";
110 return filename;
111}
112
113//! looks if file is in the same directory of path. returns offset of directory.
114//! 0 means in same directory. 1 means file is direct child of path
115inline s32 isInSameDirectory ( const io::path& path, const io::path& file )
116{
117 s32 subA = 0;
118 s32 subB = 0;
119 s32 pos;
120
121 if ( path.size() && !path.equalsn ( file, path.size() ) )
122 return -1;
123
124 pos = 0;
125 while ( (pos = path.findNext ( '/', pos )) >= 0 )
126 {
127 subA += 1;
128 pos += 1;
129 }
130
131 pos = 0;
132 while ( (pos = file.findNext ( '/', pos )) >= 0 )
133 {
134 subB += 1;
135 pos += 1;
136 }
137
138 return subB - subA;
139}
140
141// splits a path into components
142static inline void splitFilename(const io::path &name, io::path* path=0,
143 io::path* filename=0, io::path* extension=0, bool make_lower=false)
144{
145 s32 i = name.size();
146 s32 extpos = i;
147
148 // search for path separator or beginning
149 while ( i >= 0 )
150 {
151 if ( name[i] == '.' )
152 {
153 extpos = i;
154 if ( extension )
155 *extension = name.subString ( extpos + 1, name.size() - (extpos + 1), make_lower );
156 }
157 else
158 if ( name[i] == '/' || name[i] == '\\' )
159 {
160 if ( filename )
161 *filename = name.subString ( i + 1, extpos - (i + 1), make_lower );
162 if ( path )
163 {
164 *path = name.subString ( 0, i + 1, make_lower );
165 path->replace ( '\\', '/' );
166 }
167 return;
168 }
169 i -= 1;
170 }
171 if ( filename )
172 *filename = name.subString ( 0, extpos, make_lower );
173}
174
175
176//! some standard function ( to remove dependencies )
177#undef isdigit
178#undef isspace
179#undef isupper
180inline s32 isdigit(s32 c) { return c >= '0' && c <= '9'; }
181inline s32 isspace(s32 c) { return c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v'; }
182inline s32 isupper(s32 c) { return c >= 'A' && c <= 'Z'; }
183
184
185} // end namespace core
186} // end namespace irr
187
188#endif
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