NetBSD-5.0.2/dist/nvi/common/conv.c
/* $NetBSD: conv.c,v 1.3.6.2 2009/01/20 02:47:43 snj Exp $ */
/*-
* Copyright (c) 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "Id: conv.c,v 1.27 2001/08/18 21:41:41 skimo Exp (Berkeley) Date: 2001/08/18 21:41:41";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "common.h"
#ifdef USE_ICONV
#include <langinfo.h>
#include <iconv.h>
#define LANGCODESET nl_langinfo(CODESET)
#else
typedef int iconv_t;
#define LANGCODESET ""
#endif
#include <locale.h>
#ifdef USE_WIDECHAR
static int
raw2int(SCR *sp, const char * str, ssize_t len, CONVWIN *cw, size_t *tolen,
const CHAR_T **dst)
{
int i;
CHAR_T **tostr = (CHAR_T **)(void *)&cw->bp1;
size_t *blen = &cw->blen1;
BINC_RETW(NULL, *tostr, *blen, len);
*tolen = len;
for (i = 0; i < len; ++i)
(*tostr)[i] = (u_char) str[i];
*dst = cw->bp1;
return 0;
}
#define CONV_BUFFER_SIZE 512
/* fill the buffer with codeset encoding of string pointed to by str
* left has the number of bytes left in str and is adjusted
* len contains the number of bytes put in the buffer
*/
#ifdef USE_ICONV
#define CONVERT(str, left, src, len) \
do { \
size_t outleft; \
char *bp = buffer; \
outleft = CONV_BUFFER_SIZE; \
errno = 0; \
if (iconv(id, (const char **)&str, &left, &bp, &outleft) == -1 \
/* && errno != E2BIG */) \
goto err; \
if ((len = CONV_BUFFER_SIZE - outleft) == 0) { \
error = -left; \
goto err; \
} \
src = buffer; \
} while (0)
#else
#define CONVERT(str, left, src, len)
#endif
static int
default_char2int(SCR *sp, const char * str, ssize_t len, CONVWIN *cw,
size_t *tolen, const CHAR_T **dst, const char *enc)
{
int i = 0, j;
CHAR_T **tostr = (CHAR_T **)(void *)&cw->bp1;
size_t *blen = &cw->blen1;
mbstate_t mbs;
size_t n;
ssize_t nlen = len;
const char *src = (const char *)str;
iconv_t id = (iconv_t)-1;
char buffer[CONV_BUFFER_SIZE];
size_t left = len;
int error = 1;
MEMSET(&mbs, 0, 1);
BINC_RETW(NULL, *tostr, *blen, nlen);
#ifdef USE_ICONV
if (strcmp(nl_langinfo(CODESET), enc)) {
id = iconv_open(nl_langinfo(CODESET), enc);
if (id == (iconv_t)-1)
goto err;
CONVERT(str, left, src, len);
}
#endif
for (i = 0, j = 0; j < len; ) {
n = mbrtowc((*tostr)+i, src+j, len-j, &mbs);
/* NULL character converted */
if (n == -2) error = -(len-j);
if (n == -1 || n == -2) goto err;
if (n == 0) n = 1;
j += n;
if (++i >= *blen) {
nlen += 256;
BINC_RETW(NULL, *tostr, *blen, nlen);
}
if (id != (iconv_t)-1 && j == len && left) {
CONVERT(str, left, src, len);
j = 0;
}
}
*tolen = i;
if (id != (iconv_t)-1)
iconv_close(id);
*dst = cw->bp1;
return 0;
err:
*tolen = i;
if (id != (iconv_t)-1)
iconv_close(id);
*dst = cw->bp1;
return error;
}
static int
fe_char2int(SCR *sp, const char * str, ssize_t len, CONVWIN *cw,
size_t *tolen, const CHAR_T **dst)
{
return default_char2int(sp, str, len, cw, tolen, dst, O_STR(sp, O_FILEENCODING));
}
static int
ie_char2int(SCR *sp, const char * str, ssize_t len, CONVWIN *cw,
size_t *tolen, const CHAR_T **dst)
{
return default_char2int(sp, str, len, cw, tolen, dst, O_STR(sp, O_INPUTENCODING));
}
static int
cs_char2int(SCR *sp, const char * str, ssize_t len, CONVWIN *cw,
size_t *tolen, const CHAR_T **dst)
{
return default_char2int(sp, str, len, cw, tolen, dst, LANGCODESET);
}
static int
CHAR_T_int2char(SCR *sp, const CHAR_T * str, ssize_t len, CONVWIN *cw,
size_t *tolen, const char **dst)
{
*tolen = len * sizeof(CHAR_T);
*dst = (const char *)(const void *)str;
return 0;
}
static int
CHAR_T_char2int(SCR *sp, const char * str, ssize_t len, CONVWIN *cw,
size_t *tolen, const CHAR_T **dst)
{
*tolen = len / sizeof(CHAR_T);
*dst = (const CHAR_T*) str;
return 0;
}
static int
int2raw(SCR *sp, const CHAR_T * str, ssize_t len, CONVWIN *cw, size_t *tolen,
const char **dst)
{
int i;
char **tostr = (char **)(void *)&cw->bp1;
size_t *blen = &cw->blen1;
BINC_RETC(NULL, *tostr, *blen, len);
*tolen = len;
for (i = 0; i < len; ++i)
(*tostr)[i] = str[i];
*dst = cw->bp1;
return 0;
}
static int
default_int2char(SCR *sp, const CHAR_T * str, ssize_t len, CONVWIN *cw,
size_t *tolen, const char **pdst, const char *enc)
{
size_t i, j;
int offset = 0;
char **tostr = (char **)(void *)&cw->bp1;
size_t *blen = &cw->blen1;
mbstate_t mbs;
size_t n;
ssize_t nlen = len + MB_CUR_MAX;
char *dst;
size_t buflen;
char buffer[CONV_BUFFER_SIZE];
iconv_t id = (iconv_t)-1;
/* convert first len bytes of buffer and append it to cw->bp
* len is adjusted => 0
* offset contains the offset in cw->bp and is adjusted
* cw->bp is grown as required
*/
#ifdef USE_ICONV
#define CONVERT2(len, cw, offset) \
do { \
const char *bp = buffer; \
while (len != 0) { \
size_t outleft = cw->blen1 - offset; \
char *obp = (char *)cw->bp1 + offset; \
if (cw->blen1 < offset + MB_CUR_MAX) { \
nlen += 256; \
BINC_RETC(NULL, cw->bp1, cw->blen1, nlen); \
} \
errno = 0; \
if (iconv(id, &bp, &len, &obp, &outleft) == -1 && \
errno != E2BIG) \
goto err; \
offset = cw->blen1 - outleft; \
} \
} while (0)
#else
#define CONVERT2(len, cw, offset)
#endif
MEMSET(&mbs, 0, 1);
BINC_RETC(NULL, *tostr, *blen, nlen);
dst = *tostr; buflen = *blen;
#ifdef USE_ICONV
if (strcmp(nl_langinfo(CODESET), enc)) {
id = iconv_open(enc, nl_langinfo(CODESET));
if (id == (iconv_t)-1)
goto err;
dst = buffer; buflen = CONV_BUFFER_SIZE;
}
#endif
for (i = 0, j = 0; i < len; ++i) {
n = wcrtomb(dst+j, str[i], &mbs);
if (n == -1) goto err;
j += n;
if (buflen < j + MB_CUR_MAX) {
if (id != (iconv_t)-1) {
CONVERT2(j, cw, offset);
} else {
nlen += 256;
BINC_RETC(NULL, *tostr, *blen, nlen);
dst = *tostr; buflen = *blen;
}
}
}
n = wcrtomb(dst+j, L'\0', &mbs);
j += n - 1; /* don't count NUL at the end */
*tolen = j;
if (id != (iconv_t)-1) {
CONVERT2(j, cw, offset);
*tolen = offset;
}
*pdst = cw->bp1;
return 0;
err:
*tolen = j;
*pdst = cw->bp1;
return 1;
}
static int
fe_int2char(SCR *sp, const CHAR_T * str, ssize_t len, CONVWIN *cw,
size_t *tolen, const char **dst)
{
return default_int2char(sp, str, len, cw, tolen, dst, O_STR(sp, O_FILEENCODING));
}
static int
cs_int2char(SCR *sp, const CHAR_T * str, ssize_t len, CONVWIN *cw,
size_t *tolen, const char **dst)
{
return default_int2char(sp, str, len, cw, tolen, dst, LANGCODESET);
}
#endif
void
conv_init (SCR *orig, SCR *sp)
{
if (orig != NULL)
MEMCPY(&sp->conv, &orig->conv, 1);
else {
setlocale(LC_ALL, "");
#ifdef USE_WIDECHAR
sp->conv.sys2int = cs_char2int;
sp->conv.int2sys = cs_int2char;
sp->conv.file2int = fe_char2int;
sp->conv.int2file = fe_int2char;
sp->conv.input2int = ie_char2int;
#endif
#ifdef USE_ICONV
o_set(sp, O_FILEENCODING, OS_STRDUP, nl_langinfo(CODESET), 0);
o_set(sp, O_INPUTENCODING, OS_STRDUP, nl_langinfo(CODESET), 0);
#endif
}
}
int
conv_enc (SCR *sp, int option, const char *enc)
{
#if defined(USE_WIDECHAR) && defined(USE_ICONV)
iconv_t id;
char2wchar_t *c2w;
wchar2char_t *w2c;
switch (option) {
case O_FILEENCODING:
c2w = &sp->conv.file2int;
w2c = &sp->conv.int2file;
break;
case O_INPUTENCODING:
c2w = &sp->conv.input2int;
w2c = NULL;
break;
default:
c2w = NULL;
w2c = NULL;
break;
}
if (!*enc) {
if (c2w) *c2w = raw2int;
if (w2c) *w2c = int2raw;
return 0;
}
if (!strcmp(enc, "WCHAR_T")) {
if (c2w) *c2w = CHAR_T_char2int;
if (w2c) *w2c = CHAR_T_int2char;
return 0;
}
id = iconv_open(enc, nl_langinfo(CODESET));
if (id == (iconv_t)-1)
goto err;
iconv_close(id);
id = iconv_open(nl_langinfo(CODESET), enc);
if (id == (iconv_t)-1)
goto err;
iconv_close(id);
switch (option) {
case O_FILEENCODING:
*c2w = fe_char2int;
*w2c = fe_int2char;
break;
case O_INPUTENCODING:
*c2w = ie_char2int;
break;
}
F_CLR(sp, SC_CONV_ERROR);
F_SET(sp, SC_SCR_REFORMAT);
return 0;
err:
switch (option) {
case O_FILEENCODING:
msgq(sp, M_ERR,
"321|File encoding conversion not supported");
break;
case O_INPUTENCODING:
msgq(sp, M_ERR,
"322|Input encoding conversion not supported");
break;
}
#endif
return 1;
}