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-rw-r--r--src/eyetil.cc103
1 files changed, 103 insertions, 0 deletions
diff --git a/src/eyetil.cc b/src/eyetil.cc
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1#include <stdlib.h>
2#include <syslog.h>
3#include <iostream>
4#include <cassert>
5#include <stdexcept>
6#include <openssl/md5.h>
7#include "eyetil.h"
8
9binary_t& binary_t::from_hex(const std::string& h) {
10 /* TODO: algorithmize */
11 std::string::size_type hs = h.length();
12 if(hs&1)
13 throw std::runtime_error("odd number of characters in hexadecimal number");
14 int rvs = hs>>1;
15 resize(rvs);
16 const unsigned char *hp = (const unsigned char*)h.data();
17 iterator oi=begin();
18 char t[3] = { 0,0,0 };
19 for(int i=0;i<rvs;++i) {
20 t[0]=*(hp++); t[1]=*(hp++);
21 *(oi++) = strtol(t,0,16);
22 }
23 return *this;
24}
25
26binary_t& binary_t::from_data(const void *d,size_t s) {
27 resize(s);
28 std::copy((const unsigned char*)d,(const unsigned char *)d+s,
29 begin() );
30 return *this;
31}
32
33std::string binary_t::hex() const {
34 std::string rv;
35 rv.reserve((size()<<1)+1);
36 char t[3] = {0,0,0};
37 for(const_iterator i=begin(),ie=end();i!=ie;++i) {
38 int rc = snprintf(t,sizeof(t),"%02x",*i);
39 assert(rc<sizeof(t));
40 rv += t;
41 }
42 return rv;
43}
44
45binary_t binary_t::md5() const {
46 binary_t rv(MD5_DIGEST_LENGTH);
47 if(!MD5(
48 (const unsigned char*)&(front()),size(),
49 (unsigned char*)&(rv.front()) ))
50 throw std::runtime_error("failed to md5()");
51 return rv;
52}
53
54tmpdir_t::tmpdir_t(const std::string& dt) : dir(dt) {
55 if(!mkdtemp((char*)dir.data()))
56 throw std::runtime_error("failed to mkdtmp()");
57}
58tmpdir_t::~tmpdir_t() {
59 assert(!dir.empty());
60 if(rmdir(dir.c_str())) {
61 syslog(LOG_WARNING,"Failed to remove '%s' directory",dir.c_str());
62 }
63}
64
65std::string tmpdir_t::get_file(const std::string& f) {
66 std::string::size_type ls = f.rfind('/');
67 return dir+'/'+(
68 (ls==std::string::npos)
69 ? f
70 : f.substr(ls+1)
71 );
72}
73
74tarchive_t::tarchive_t(void *p,size_t s) : a(archive_read_new()), e(0) {
75 if(!a) throw std::runtime_error("failed to archive_read_new()");
76 if(archive_read_support_format_tar(a)) {
77 archive_read_finish(a);
78 throw std::runtime_error("failed to archive_read_support_format_tar()");
79 }
80 if(archive_read_open_memory(a,p,s)) {
81 archive_read_finish(a);
82 throw std::runtime_error("failed to archive_read_open_memory()");
83 }
84}
85tarchive_t::~tarchive_t() {
86 assert(a);
87 archive_read_finish(a);
88}
89
90bool tarchive_t::read_next_header() {
91 assert(a);
92 return archive_read_next_header(a,&e)==ARCHIVE_OK;
93}
94
95std::string tarchive_t::entry_pathname() {
96 assert(a); assert(e);
97 return archive_entry_pathname(e);
98}
99
100bool tarchive_t::read_data_into_fd(int fd) {
101 assert(a);
102 return archive_read_data_into_fd(a,fd)==ARCHIVE_OK;
103}