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
|
#include "guess_extension.h"
#include <string.h>
#include "is_stl.h"
#include "ply.h"
IGL_INLINE void igl::guess_extension(FILE * fp, std::string & guess)
{
const auto is_off = [](FILE * fp)-> bool
{
char header[1000];
const std::string OFF("OFF");
const std::string NOFF("NOFF");
const std::string COFF("COFF");
bool f = (fscanf(fp,"%s\n",header)==1 && (
std::string(header).compare(0, OFF.length(), OFF)==0 ||
std::string(header).compare(0, COFF.length(), COFF)==0 ||
std::string(header).compare(0,NOFF.length(),NOFF)==0));
rewind(fp);
return f;
};
const auto is_ply = [](FILE * ply_file) -> bool
{
int nelems;
char ** elem_names;
igl::ply::PlyFile * in_ply = igl::ply::ply_read(ply_file,&nelems,&elem_names);
if(in_ply==NULL)
{
return false;
}
free(in_ply);
rewind(ply_file);
return true;
};
const auto is_wrl = [](FILE * wrl_file)->bool
{
bool still_comments = true;
char line[1000];
std::string needle("point [");
std::string haystack;
while(still_comments)
{
if(fgets(line,1000,wrl_file) == NULL)
{
rewind(wrl_file);
return false;
}
haystack = std::string(line);
still_comments = std::string::npos == haystack.find(needle);
}
rewind(wrl_file);
return true;
};
const auto is_mesh = [](FILE * mesh_file )->bool
{
char line[2048];
// eat comments at beginning of file
bool still_comments= true;
while(still_comments)
{
if(fgets(line,2048,mesh_file) == NULL)
{
rewind(mesh_file);
return false;
}
still_comments = (line[0] == '#' || line[0] == '\n');
}
char str[2048];
sscanf(line," %s",str);
// check that first word is MeshVersionFormatted
if(0!=strcmp(str,"MeshVersionFormatted"))
{
rewind(mesh_file);
return false;
}
rewind(mesh_file);
return true;
};
guess = "obj";
if(is_mesh(fp))
{
guess = "mesh";
}else if(is_off(fp))
{
guess = "off";
}else if(is_ply(fp))
{
guess = "ply";
}else if(igl::is_stl(fp))
{
guess = "stl";
}else if(is_wrl(fp))
{
guess = "wrl";
}
// else obj
rewind(fp);
}
IGL_INLINE std::string igl::guess_extension(FILE * fp)
{
std::string guess;
guess_extension(fp,guess);
return guess;
}
|
