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#include "charconv.h"
#include <iconv.h>
#include <langinfo.h>
#include <locale.h>
#include <stdio.h>
static iconv_t iconv_init_codepage(int codepage)
{
iconv_t result;
char codepage_name[16];
snprintf(codepage_name, sizeof(codepage_name), "CP%d", codepage);
result = iconv_open(nl_langinfo(CODESET), codepage_name);
if (result == (iconv_t) - 1)
perror(codepage_name);
return result;
}
static iconv_t dos_to_local;
/*
* Initialize conversion from codepage.
* codepage = -1 means default codepage.
* Returns 0 on success, non-zero on failure
*/
static int init_conversion(int codepage)
{
static int initialized = -1;
if (initialized < 0) {
initialized = 1;
if (codepage < 0)
codepage = DEFAULT_DOS_CODEPAGE;
setlocale(LC_ALL, ""); /* initialize locale */
dos_to_local = iconv_init_codepage(codepage);
if (dos_to_local == (iconv_t) - 1 && codepage != DEFAULT_DOS_CODEPAGE) {
printf("Trying to set fallback DOS codepage %d\n",
DEFAULT_DOS_CODEPAGE);
dos_to_local = iconv_init_codepage(DEFAULT_DOS_CODEPAGE);
if (dos_to_local == (iconv_t) - 1)
initialized = 0; /* no conversion available */
}
}
return initialized;
}
int set_dos_codepage(int codepage)
{
return init_conversion(codepage);
}
int dos_char_to_printable(char **p, unsigned char c)
{
char in[1] = { c };
char *pin = in;
size_t bytes_in = 1;
size_t bytes_out = 4;
if (!init_conversion(-1))
return 0;
return iconv(dos_to_local, &pin, &bytes_in, p, &bytes_out) != -1;
}
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