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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* © Copyright 1996-2012 ECMWF.
*
* This software is licensed under the terms of the Apache Licence Version 2.0
* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
* In applying this licence, ECMWF does not waive the privileges and immunities
* granted to it by virtue of its status as an intergovernmental organisation nor
* does it submit to any jurisdiction.
*/
#include <ctype.h>
#include <sys/types.h>
#include "mars.h"
static char* scan_file(const char* file) {
FILE* f = fopen(file, "r");
int len;
int max;
unsigned char c = ' ';
union {
char c;
short s;
long l;
char ch[8];
} buf;
if (f == NULL)
return "BAD";
memset(&buf, 0, sizeof(buf));
if ((len = fread((char*)&buf, 1, sizeof(buf), f)) < 0) {
fclose(f);
marslog(LOG_DBUG, "Bad len '%d' while reading '%s'", len, file);
return "BAD";
}
if (strncmp(buf.ch, "%!", 2) == 0) {
fclose(f);
return "PSFILE";
}
if (strncmp(buf.ch, "#!", 2) == 0) {
fclose(f);
return "SHELL";
}
if (strncmp(buf.ch, "GRIB", 4) == 0) {
fclose(f);
return "GRIB";
}
if (strncmp(buf.ch, "TIDE", 4) == 0) {
fclose(f);
return "GRIB";
}
if (strncmp(buf.ch, "BUDG", 4) == 0) {
fclose(f);
return "GRIB";
}
if (strncmp(buf.ch, "BUFR", 4) == 0) {
fclose(f);
return "BUFR";
}
if (strncmp(buf.ch, "%!", 2) == 0) {
fclose(f);
return "POSTSCRIPT";
}
if (strncmp(buf.ch, "#GEO", 4) == 0) {
fclose(f);
return "GEOPOINTS";
}
if (strncmp(buf.ch, "#LLM", 4) == 0) {
fclose(f);
return "LLMATRIX";
}
if (strncmp(buf.ch + 2, "GRIB", 4) == 0) {
fclose(f);
return "GRIB";
}
if (strncmp(buf.ch + 4, "GRIB", 4) == 0) {
fclose(f);
return "GRIB";
}
if (strncmp(buf.ch + 2, "BUFR", 4) == 0) {
fclose(f);
return "BUFR";
}
if (strncmp(buf.ch + 4, "BUFR", 4) == 0) {
fclose(f);
return "BUFR";
}
if (strncmp(buf.ch, "CDF", 3) == 0) {
fclose(f);
return "NETCDF";
}
rewind(f);
max = 4096; /* 4 K */
while (max-- > 0 && !feof(f)) {
fread((char*)&c, 1, 1, f);
if (!isprint(c) && !isspace(c)) {
fclose(f);
return "BINARY";
}
}
fclose(f);
return "NOTE";
}
char* guess_class(const char* file) {
struct stat buf;
if (stat(file, &buf) < 0)
return "BAD";
switch (buf.st_mode & S_IFMT) {
case S_IFDIR:
return "FOLDER";
case S_IFREG:
return scan_file(file);
default:
return "SPECIAL";
}
}
|
