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/**
*** iconv_open(), iconv(), iconv_close() wrappers for the OS/400.
***
*** See Copyright for the status of this software.
***
*** Author: Patrick Monnerat <pm@datasphere.ch>, DATASPHERE S.A.
**/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include "/QIBM/include/iconv.h" /* Force system definition. */
#define USE_SYSTEM_ICONV
#include "iconv.h" /* Use local definitions. */
/**
*** Bring-in the name-->CCSID mapping DFA tables.
**/
#include "ianatables.c"
static int
findEncoding(const unsigned char * * namep)
{
t_staterange curstate;
t_ccsid ccsid;
t_ccsid final;
t_transrange l;
t_transrange h;
const unsigned char * name;
/**
*** Get the CCSID correspong to the name at *`namep'.
*** If success, update pointer at `namep' to 1st byte after matched
*** name and return the CCSID.
*** If failure, set errno and return -1.
**/
if (!namep || !(name = *namep)) {
errno = EINVAL;
return -1;
}
curstate = 0;
final = 0;
for (;;) {
if (curstate < sizeof final_array / sizeof final_array[0])
if (final_array[curstate]) {
final = final_array[curstate];
*namep = name;
}
l = trans_array[curstate] - 1;
h = trans_array[curstate + 1];
do {
if (++l >= h) {
if (!final) {
errno = EINVAL;
return -1;
}
return final - 1;
}
} while (label_array[l] != *name);
curstate = goto_array[l];
name++;
}
/* NOTREACHED. */
}
static void
makeos400codename(char * buf, unsigned int ccsid)
{
ccsid &= 0xFFFF;
memset(buf, 0, 32);
sprintf(buf, "IBMCCSID%05u0000000", ccsid);
}
Iconv_t
IconvOpen(const char * tocode, const char * fromcode)
{
int toccsid = findEncoding(&tocode);
int fromccsid = findEncoding(&fromcode);
char fromibmccsid[33];
char toibmccsid[33];
iconv_t * cd;
if (toccsid < 0 || fromccsid < 0)
return (Iconv_t) -1;
makeos400codename(fromibmccsid, fromccsid);
makeos400codename(toibmccsid, toccsid);
memset(toibmccsid + 13, 0, sizeof toibmccsid - 13);
cd = (iconv_t *) malloc(sizeof *cd);
if (!cd)
return (Iconv_t) -1;
*cd = iconv_open(toibmccsid, fromibmccsid);
if (cd->return_value) {
free((char *) cd);
return (Iconv_t) -1;
}
return (Iconv_t) cd;
}
size_t
Iconv(Iconv_t cd, char * * inbuf, size_t * inbytesleft,
char * * outbuf, size_t * outbytesleft)
{
if (!cd || cd == (Iconv_t) -1) {
errno = EINVAL;
return (size_t) -1;
}
return iconv(*(iconv_t *) cd, inbuf, inbytesleft, outbuf, outbytesleft);
}
int
IconvClose(Iconv_t cd)
{
if (!cd || cd == (Iconv_t) -1) {
errno = EINVAL;
return -1;
}
if (iconv_close(*(iconv_t *) cd))
return -1;
free((char *) cd);
return 0;
}
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