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