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
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "unicode/charsets.h"
#include "unicode/encoding.h"
#include "internal.h"
struct table_entry {
const char *alias;
const char *encname;
};
/* This table contains special cases to allow us to use UnicodeLib sensibly. */
static const struct table_entry mapping_table[] = {
{"/UTF-7/UNICODE-1-1-UTF-7/UNICODE-2-0-UTF-7/", "UTF-7" },
{"/ISO-10646-UCS-4/UCS-4/UTF-32/", "ISO-10646-UCS-4" },
{"/UTF-16/UCS-2/ISO-10646-UCS-2/UNICODE-1-1/UNICODE-2-0/", "UTF-16" },
{"/ISO-2022/", "ISO-2022" },
};
#define TABLE_SIZE (sizeof(mapping_table) / sizeof(mapping_table[0]))
/**
* Look up an encoding number, based on its name
*
* \param name The encoding name
* \return The encoding number, or 0 if not found.
*/
int iconv_encoding_number_from_name(const char *name)
{
unsigned int i;
char buf[256];
struct canon *c;
if (!name)
return 0;
snprintf(buf, sizeof buf, "/%s/", name);
/* convert to upper case */
for (i = 0; i != strlen(buf); i++) {
if (buf[i] >= 'a' && buf[i] <= 'z')
buf[i] = buf[i] - 32;
}
for (i = 0; i != TABLE_SIZE; i++)
if (strstr(mapping_table[i].alias, buf) != NULL)
return encoding_number_from_name(mapping_table[i].encname);
c = alias_canonicalise(name);
if (!c)
return 0;
return encoding_number_from_name(c->name);
}
/**
* Look up an encoding name, based on its MIB number
*
* \param number The encoding MIB number
* \return Pointer to encoding name, or NULL if not found
*/
const char *iconv_encoding_name_from_number(int number)
{
const char *ret = NULL;
/* This is a PITA - UnicodeLib doesn't have a call to do this,
* so implement it ourselves. */
switch (number) {
case csUnicode11UTF7:
ret = mapping_table[0].alias;
break;
case csUCS4:
ret = mapping_table[1].alias;
break;
case csUnicode11:
ret = mapping_table[2].alias;
break;
case csVenturaMath:
ret = mapping_table[3].alias;
break;
default:
ret = mibenum_to_name(number);
break;
}
return ret;
}
|
