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#include "config.h"
#include <errno.h>
#include <iconv.h>
#include <string.h>
#include "charset.h"
char charset_buf[CHARSET_BUF_SIZE];
char charset_hex_digit[] = "0123456789ABCDEF";
iconv_t charset_local2samba = (iconv_t) (-1);
iconv_t charset_samba2local = (iconv_t) (-1);
int charset_init(const char *local, const char *samba){
charset_local2samba = iconv_open(samba, local);
if (charset_local2samba == (iconv_t) (-1)) return -1;
charset_samba2local = iconv_open(local, samba);
if (charset_samba2local == (iconv_t) (-1)){
iconv_close(charset_local2samba);
charset_local2samba = (iconv_t) (-1);
return -1;
}
return 0;
}
char * charset_samba_to_local(iconv_t cd,
const char *str, size_t str_len,
char *buf, size_t buf_len){
size_t i, r, len, out_len;
char *in, *out;
if ((buf == NULL) || (buf_len == 0) || (cd == (iconv_t)(-1))) return NULL;
len = 0;
while(str_len > 0){
in = (char*) str;
out = buf + len;
out_len = buf_len - len;
if (out_len == 0) return NULL;
for(i = 1; i <= str_len; i++){
r = iconv(cd, &in, &i, &out, &out_len);
/* conversion error */
if (r == (size_t)(-1)){
if (errno == E2BIG) return NULL;
if (errno == EINVAL) continue;
goto conversion_is_bad;
}
/* conversion is ok, but not reversable */
if (r != 0) goto conversion_is_bad;
/* conversion is ok */
switch(buf[len]){
case ':':
case '@':
case '%':
case '/':
case '\\':
/* this characters is not allowed in names */
goto conversion_is_bad;
default:
goto conversion_is_ok;
};
}
conversion_is_bad:
if (buf_len - len < 3) return NULL;
buf[len++] = '%';
buf[len++] = charset_hex_digit[(*str & 0xF0) >> 4];
buf[len++] = charset_hex_digit[*str & 0x0F];
str++; str_len--;
continue;
conversion_is_ok:
str_len -= (in - str); str = in;
len = out - buf;
continue;
}
return buf;
}
char * charset_local_to_samba(iconv_t cd,
const char *str, size_t str_len,
char *buf, size_t buf_len){
size_t i, r, len, out_len;
char *in, *out;
if ((buf == NULL) || (buf_len == 0) || (cd == (iconv_t)(-1))) return NULL;
len = 0;
while(str_len > 0){
in = (char*) str;
out = buf + len;
out_len = buf_len - len;
if (out_len == 0) return NULL;
for(i = 1; i <= str_len; i++){
r = iconv(cd, &in, &i, &out, &out_len);
if (r != (size_t)(-1)) goto conversion_is_ok;
if (errno == E2BIG) return NULL;
if (errno == EINVAL) continue;
break;
}
/* conversion is bad */
return NULL;
conversion_is_ok:
str_len -= (in - str); str = in;
len = out - buf;
continue;
}
return buf;
}
char * charset_local2smb_r(const char *src, char *dst, size_t dst_len){
const char *smb_prefix = "smb:/";
const int smb_prefix_len = 5;
char *res;
memset(dst, 0, dst_len);
strcpy(dst, smb_prefix);
res = charset_local_to_samba(
charset_local2samba,
src, strlen(src),
dst + smb_prefix_len, dst_len - smb_prefix_len - 1);
return (res != NULL) ? dst : NULL;
}
char * charset_smb2local_r(const char *src, char *dst, size_t dst_len){
char *res;
memset(dst, 0, dst_len);
res = charset_samba_to_local(
charset_samba2local,
src, strlen(src),
dst, dst_len - 1);
return (res != NULL) ? dst : NULL;
}
char * charset_local2smb(const char *src){
return charset_local2smb_r(src,
charset_buf,
sizeof(charset_buf));
}
char * charset_smb2local(const char *src){
return charset_smb2local_r(src,
charset_buf,
sizeof(charset_buf));
}
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